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-rw-r--r--drivers/watchdog/Kconfig74
-rw-r--r--drivers/watchdog/Makefile7
-rw-r--r--drivers/watchdog/atlas7_wdt.c221
-rw-r--r--drivers/watchdog/coh901327_wdt.c408
-rw-r--r--drivers/watchdog/hpwdt.c6
-rw-r--r--drivers/watchdog/intel-mid_wdt.c8
-rw-r--r--drivers/watchdog/intel_scu_watchdog.c533
-rw-r--r--drivers/watchdog/intel_scu_watchdog.h50
-rw-r--r--drivers/watchdog/it8712f_wdt.c1
-rw-r--r--drivers/watchdog/keembay_wdt.c286
-rw-r--r--drivers/watchdog/mei_wdt.c1
-rw-r--r--drivers/watchdog/mtk_wdt.c23
-rw-r--r--drivers/watchdog/pcwd.c7
-rw-r--r--drivers/watchdog/qcom-wdt.c13
-rw-r--r--drivers/watchdog/renesas_wdt.c33
-rw-r--r--drivers/watchdog/sirfsoc_wdt.c216
-rw-r--r--drivers/watchdog/tangox_wdt.c209
-rw-r--r--drivers/watchdog/watchdog_core.c2
-rw-r--r--drivers/watchdog/ziirave_wdt.c1
-rw-r--r--drivers/watchdog/zx2967_wdt.c279
20 files changed, 359 insertions, 2019 deletions
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 7ff941e71b79..1fe0042a48d2 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -254,17 +254,6 @@ config MENZ069_WATCHDOG
This driver can also be built as a module. If so the module
will be called menz069_wdt.
-config TANGOX_WATCHDOG
- tristate "Sigma Designs SMP86xx/SMP87xx watchdog"
- select WATCHDOG_CORE
- depends on ARCH_TANGO || COMPILE_TEST
- depends on HAS_IOMEM
- help
- Support for the watchdog in Sigma Designs SMP86xx (tango3)
- and SMP87xx (tango4) family chips.
-
- This driver can be built as a module. The module name is tangox_wdt.
-
config WDAT_WDT
tristate "ACPI Watchdog Action Table (WDAT)"
depends on ACPI
@@ -630,17 +619,6 @@ config SUNXI_WATCHDOG
To compile this driver as a module, choose M here: the
module will be called sunxi_wdt.
-config COH901327_WATCHDOG
- bool "ST-Ericsson COH 901 327 watchdog"
- depends on ARCH_U300 || (ARM && COMMON_CLK && COMPILE_TEST)
- default y if MACH_U300
- select WATCHDOG_CORE
- help
- Say Y here to include Watchdog timer support for the
- watchdog embedded into the ST-Ericsson U300 series platforms.
- This watchdog is used to reset the system and thus cannot be
- compiled as a module.
-
config NPCM7XX_WATCHDOG
tristate "Nuvoton NPCM750 watchdog"
depends on ARCH_NPCM || COMPILE_TEST
@@ -788,16 +766,6 @@ config MOXART_WDT
To compile this driver as a module, choose M here: the
module will be called moxart_wdt.
-config SIRFSOC_WATCHDOG
- tristate "SiRFSOC watchdog"
- depends on HAS_IOMEM
- depends on ARCH_SIRF || COMPILE_TEST
- select WATCHDOG_CORE
- default y
- help
- Support for CSR SiRFprimaII and SiRFatlasVI watchdog. When
- the watchdog triggers the system will be reset.
-
config ST_LPC_WATCHDOG
tristate "STMicroelectronics LPC Watchdog"
depends on ARCH_STI || COMPILE_TEST
@@ -900,16 +868,6 @@ config LPC18XX_WATCHDOG
To compile this driver as a module, choose M here: the
module will be called lpc18xx_wdt.
-config ATLAS7_WATCHDOG
- tristate "CSRatlas7 watchdog"
- depends on ARCH_ATLAS7 || COMPILE_TEST
- help
- Say Y here to include Watchdog timer support for the watchdog
- existing on the CSRatlas7 series platforms.
-
- To compile this driver as a module, choose M here: the
- module will be called atlas7_wdt.
-
config RENESAS_WDT
tristate "Renesas WDT Watchdog"
depends on ARCH_RENESAS || COMPILE_TEST
@@ -939,16 +897,6 @@ config ASPEED_WATCHDOG
To compile this driver as a module, choose M here: the
module will be called aspeed_wdt.
-config ZX2967_WATCHDOG
- tristate "ZTE zx2967 SoCs watchdog support"
- depends on ARCH_ZX
- select WATCHDOG_CORE
- help
- Say Y here to include support for the watchdog timer
- in ZTE zx2967 SoCs.
- To compile this driver as a module, choose M here: the
- module will be called zx2967_wdt.
-
config STM32_WATCHDOG
tristate "STM32 Independent WatchDoG (IWDG) support"
depends on ARCH_STM32
@@ -1219,15 +1167,6 @@ config IE6XX_WDT
To compile this driver as a module, choose M here: the
module will be called ie6xx_wdt.
-config INTEL_SCU_WATCHDOG
- bool "Intel SCU Watchdog for Mobile Platforms"
- depends on X86_INTEL_MID
- help
- Hardware driver for the watchdog time built into the Intel SCU
- for Intel Mobile Platforms.
-
- To compile this driver as a module, choose M here.
-
config INTEL_MID_WATCHDOG
tristate "Intel MID Watchdog Timer"
depends on X86_INTEL_MID
@@ -2155,4 +2094,17 @@ config USBPCWATCHDOG
Most people will say N.
+config KEEMBAY_WATCHDOG
+ tristate "Intel Keem Bay SoC non-secure watchdog"
+ depends on ARCH_KEEMBAY || (ARM64 && COMPILE_TEST)
+ select WATCHDOG_CORE
+ help
+ This option enable support for an In-secure watchdog timer driver for
+ Intel Keem Bay SoC. This WDT has a 32 bit timer and decrements in every
+ count unit. An interrupt will be triggered, when the count crosses
+ the thershold configured in the register.
+
+ To compile this driver as a module, choose M here: the
+ module will be called keembay_wdt.
+
endif # WATCHDOG
diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index 5c74ee19d441..f3a6540e725e 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -61,7 +61,6 @@ obj-$(CONFIG_K3_RTI_WATCHDOG) += rti_wdt.o
obj-$(CONFIG_ORION_WATCHDOG) += orion_wdt.o
obj-$(CONFIG_SUNXI_WATCHDOG) += sunxi_wdt.o
obj-$(CONFIG_RN5T618_WATCHDOG) += rn5t618_wdt.o
-obj-$(CONFIG_COH901327_WATCHDOG) += coh901327_wdt.o
obj-$(CONFIG_NPCM7XX_WATCHDOG) += npcm_wdt.o
obj-$(CONFIG_STMP3XXX_RTC_WATCHDOG) += stmp3xxx_rtc_wdt.o
obj-$(CONFIG_TS4800_WATCHDOG) += ts4800_wdt.o
@@ -73,7 +72,6 @@ obj-$(CONFIG_UX500_WATCHDOG) += ux500_wdt.o
obj-$(CONFIG_RETU_WATCHDOG) += retu_wdt.o
obj-$(CONFIG_BCM2835_WDT) += bcm2835_wdt.o
obj-$(CONFIG_MOXART_WDT) += moxart_wdt.o
-obj-$(CONFIG_SIRFSOC_WATCHDOG) += sirfsoc_wdt.o
obj-$(CONFIG_ST_LPC_WATCHDOG) += st_lpc_wdt.o
obj-$(CONFIG_QCOM_WDT) += qcom-wdt.o
obj-$(CONFIG_BCM_KONA_WDT) += bcm_kona_wdt.o
@@ -84,11 +82,9 @@ obj-$(CONFIG_MEDIATEK_WATCHDOG) += mtk_wdt.o
obj-$(CONFIG_DIGICOLOR_WATCHDOG) += digicolor_wdt.o
obj-$(CONFIG_LPC18XX_WATCHDOG) += lpc18xx_wdt.o
obj-$(CONFIG_BCM7038_WDT) += bcm7038_wdt.o
-obj-$(CONFIG_ATLAS7_WATCHDOG) += atlas7_wdt.o
obj-$(CONFIG_RENESAS_WDT) += renesas_wdt.o
obj-$(CONFIG_RENESAS_RZAWDT) += rza_wdt.o
obj-$(CONFIG_ASPEED_WATCHDOG) += aspeed_wdt.o
-obj-$(CONFIG_ZX2967_WATCHDOG) += zx2967_wdt.o
obj-$(CONFIG_STM32_WATCHDOG) += stm32_iwdg.o
obj-$(CONFIG_UNIPHIER_WATCHDOG) += uniphier_wdt.o
obj-$(CONFIG_RTD119X_WATCHDOG) += rtd119x_wdt.o
@@ -140,12 +136,12 @@ obj-$(CONFIG_W83877F_WDT) += w83877f_wdt.o
obj-$(CONFIG_W83977F_WDT) += w83977f_wdt.o
obj-$(CONFIG_MACHZ_WDT) += machzwd.o
obj-$(CONFIG_SBC_EPX_C3_WATCHDOG) += sbc_epx_c3.o
-obj-$(CONFIG_INTEL_SCU_WATCHDOG) += intel_scu_watchdog.o
obj-$(CONFIG_INTEL_MID_WATCHDOG) += intel-mid_wdt.o
obj-$(CONFIG_INTEL_MEI_WDT) += mei_wdt.o
obj-$(CONFIG_NI903X_WDT) += ni903x_wdt.o
obj-$(CONFIG_NIC7018_WDT) += nic7018_wdt.o
obj-$(CONFIG_MLX_WDT) += mlx_wdt.o
+obj-$(CONFIG_KEEMBAY_WATCHDOG) += keembay_wdt.o
# M68K Architecture
obj-$(CONFIG_M54xx_WATCHDOG) += m54xx_wdt.o
@@ -213,7 +209,6 @@ obj-$(CONFIG_DA9055_WATCHDOG) += da9055_wdt.o
obj-$(CONFIG_DA9062_WATCHDOG) += da9062_wdt.o
obj-$(CONFIG_DA9063_WATCHDOG) += da9063_wdt.o
obj-$(CONFIG_GPIO_WATCHDOG) += gpio_wdt.o
-obj-$(CONFIG_TANGOX_WATCHDOG) += tangox_wdt.o
obj-$(CONFIG_WDAT_WDT) += wdat_wdt.o
obj-$(CONFIG_WM831X_WATCHDOG) += wm831x_wdt.o
obj-$(CONFIG_WM8350_WATCHDOG) += wm8350_wdt.o
diff --git a/drivers/watchdog/atlas7_wdt.c b/drivers/watchdog/atlas7_wdt.c
deleted file mode 100644
index 9bfe650d802f..000000000000
--- a/drivers/watchdog/atlas7_wdt.c
+++ /dev/null
@@ -1,221 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Watchdog driver for CSR Atlas7
- *
- * Copyright (c) 2015 Cambridge Silicon Radio Limited, a CSR plc group company.
- */
-
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/of.h>
-#include <linux/platform_device.h>
-#include <linux/watchdog.h>
-
-#define ATLAS7_TIMER_WDT_INDEX 5
-#define ATLAS7_WDT_DEFAULT_TIMEOUT 20
-
-#define ATLAS7_WDT_CNT_CTRL (0 + 4 * ATLAS7_TIMER_WDT_INDEX)
-#define ATLAS7_WDT_CNT_MATCH (0x18 + 4 * ATLAS7_TIMER_WDT_INDEX)
-#define ATLAS7_WDT_CNT (0x48 + 4 * ATLAS7_TIMER_WDT_INDEX)
-#define ATLAS7_WDT_CNT_EN (BIT(0) | BIT(1))
-#define ATLAS7_WDT_EN 0x64
-
-static unsigned int timeout = ATLAS7_WDT_DEFAULT_TIMEOUT;
-static bool nowayout = WATCHDOG_NOWAYOUT;
-
-module_param(timeout, uint, 0);
-module_param(nowayout, bool, 0);
-
-MODULE_PARM_DESC(timeout, "Default watchdog timeout (in seconds)");
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
- __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-struct atlas7_wdog {
- struct device *dev;
- void __iomem *base;
- unsigned long tick_rate;
- struct clk *clk;
-};
-
-static unsigned int atlas7_wdt_gettimeleft(struct watchdog_device *wdd)
-{
- struct atlas7_wdog *wdt = watchdog_get_drvdata(wdd);
- u32 counter, match, delta;
-
- counter = readl(wdt->base + ATLAS7_WDT_CNT);
- match = readl(wdt->base + ATLAS7_WDT_CNT_MATCH);
- delta = match - counter;
-
- return delta / wdt->tick_rate;
-}
-
-static int atlas7_wdt_ping(struct watchdog_device *wdd)
-{
- struct atlas7_wdog *wdt = watchdog_get_drvdata(wdd);
- u32 counter, match, delta;
-
- counter = readl(wdt->base + ATLAS7_WDT_CNT);
- delta = wdd->timeout * wdt->tick_rate;
- match = counter + delta;
-
- writel(match, wdt->base + ATLAS7_WDT_CNT_MATCH);
-
- return 0;
-}
-
-static int atlas7_wdt_enable(struct watchdog_device *wdd)
-{
- struct atlas7_wdog *wdt = watchdog_get_drvdata(wdd);
-
- atlas7_wdt_ping(wdd);
-
- writel(readl(wdt->base + ATLAS7_WDT_CNT_CTRL) | ATLAS7_WDT_CNT_EN,
- wdt->base + ATLAS7_WDT_CNT_CTRL);
- writel(1, wdt->base + ATLAS7_WDT_EN);
-
- return 0;
-}
-
-static int atlas7_wdt_disable(struct watchdog_device *wdd)
-{
- struct atlas7_wdog *wdt = watchdog_get_drvdata(wdd);
-
- writel(0, wdt->base + ATLAS7_WDT_EN);
- writel(readl(wdt->base + ATLAS7_WDT_CNT_CTRL) & ~ATLAS7_WDT_CNT_EN,
- wdt->base + ATLAS7_WDT_CNT_CTRL);
-
- return 0;
-}
-
-static int atlas7_wdt_settimeout(struct watchdog_device *wdd, unsigned int to)
-{
- wdd->timeout = to;
-
- return 0;
-}
-
-#define OPTIONS (WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE)
-
-static const struct watchdog_info atlas7_wdt_ident = {
- .options = OPTIONS,
- .firmware_version = 0,
- .identity = "atlas7 Watchdog",
-};
-
-static const struct watchdog_ops atlas7_wdt_ops = {
- .owner = THIS_MODULE,
- .start = atlas7_wdt_enable,
- .stop = atlas7_wdt_disable,
- .get_timeleft = atlas7_wdt_gettimeleft,
- .ping = atlas7_wdt_ping,
- .set_timeout = atlas7_wdt_settimeout,
-};
-
-static struct watchdog_device atlas7_wdd = {
- .info = &atlas7_wdt_ident,
- .ops = &atlas7_wdt_ops,
- .timeout = ATLAS7_WDT_DEFAULT_TIMEOUT,
-};
-
-static const struct of_device_id atlas7_wdt_ids[] = {
- { .compatible = "sirf,atlas7-tick"},
- {}
-};
-
-static void atlas7_clk_disable_unprepare(void *data)
-{
- clk_disable_unprepare(data);
-}
-
-static int atlas7_wdt_probe(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- struct atlas7_wdog *wdt;
- struct clk *clk;
- int ret;
-
- wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);
- if (!wdt)
- return -ENOMEM;
- wdt->base = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(wdt->base))
- return PTR_ERR(wdt->base);
-
- clk = devm_clk_get(dev, NULL);
- if (IS_ERR(clk))
- return PTR_ERR(clk);
- ret = clk_prepare_enable(clk);
- if (ret) {
- dev_err(dev, "clk enable failed\n");
- return ret;
- }
- ret = devm_add_action_or_reset(dev, atlas7_clk_disable_unprepare, clk);
- if (ret)
- return ret;
-
- /* disable watchdog hardware */
- writel(0, wdt->base + ATLAS7_WDT_CNT_CTRL);
-
- wdt->tick_rate = clk_get_rate(clk);
- if (!wdt->tick_rate)
- return -EINVAL;
-
- wdt->clk = clk;
- atlas7_wdd.min_timeout = 1;
- atlas7_wdd.max_timeout = UINT_MAX / wdt->tick_rate;
-
- watchdog_init_timeout(&atlas7_wdd, 0, dev);
- watchdog_set_nowayout(&atlas7_wdd, nowayout);
-
- watchdog_set_drvdata(&atlas7_wdd, wdt);
- platform_set_drvdata(pdev, &atlas7_wdd);
-
- watchdog_stop_on_reboot(&atlas7_wdd);
- watchdog_stop_on_unregister(&atlas7_wdd);
- return devm_watchdog_register_device(dev, &atlas7_wdd);
-}
-
-static int __maybe_unused atlas7_wdt_suspend(struct device *dev)
-{
- /*
- * NOTE:timer controller registers settings are saved
- * and restored back by the timer-atlas7.c
- */
- return 0;
-}
-
-static int __maybe_unused atlas7_wdt_resume(struct device *dev)
-{
- struct watchdog_device *wdd = dev_get_drvdata(dev);
-
- /*
- * NOTE: Since timer controller registers settings are saved
- * and restored back by the timer-atlas7.c, so we need not
- * update WD settings except refreshing timeout.
- */
- atlas7_wdt_ping(wdd);
-
- return 0;
-}
-
-static SIMPLE_DEV_PM_OPS(atlas7_wdt_pm_ops,
- atlas7_wdt_suspend, atlas7_wdt_resume);
-
-MODULE_DEVICE_TABLE(of, atlas7_wdt_ids);
-
-static struct platform_driver atlas7_wdt_driver = {
- .driver = {
- .name = "atlas7-wdt",
- .pm = &atlas7_wdt_pm_ops,
- .of_match_table = atlas7_wdt_ids,
- },
- .probe = atlas7_wdt_probe,
-};
-module_platform_driver(atlas7_wdt_driver);
-
-MODULE_DESCRIPTION("CSRatlas7 watchdog driver");
-MODULE_AUTHOR("Guo Zeng <Guo.Zeng@csr.com>");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:atlas7-wdt");
diff --git a/drivers/watchdog/coh901327_wdt.c b/drivers/watchdog/coh901327_wdt.c
deleted file mode 100644
index 260c50b08483..000000000000
--- a/drivers/watchdog/coh901327_wdt.c
+++ /dev/null
@@ -1,408 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * coh901327_wdt.c
- *
- * Copyright (C) 2008-2009 ST-Ericsson AB
- * Watchdog driver for the ST-Ericsson AB COH 901 327 IP core
- * Author: Linus Walleij <linus.walleij@stericsson.com>
- */
-#include <linux/moduleparam.h>
-#include <linux/mod_devicetable.h>
-#include <linux/types.h>
-#include <linux/watchdog.h>
-#include <linux/interrupt.h>
-#include <linux/pm.h>
-#include <linux/platform_device.h>
-#include <linux/io.h>
-#include <linux/bitops.h>
-#include <linux/clk.h>
-#include <linux/delay.h>
-#include <linux/err.h>
-
-#define DRV_NAME "WDOG COH 901 327"
-
-/*
- * COH 901 327 register definitions
- */
-
-/* WDOG_FEED Register 32bit (-/W) */
-#define U300_WDOG_FR 0x00
-#define U300_WDOG_FR_FEED_RESTART_TIMER 0xFEEDU
-/* WDOG_TIMEOUT Register 32bit (R/W) */
-#define U300_WDOG_TR 0x04
-#define U300_WDOG_TR_TIMEOUT_MASK 0x7FFFU
-/* WDOG_DISABLE1 Register 32bit (-/W) */
-#define U300_WDOG_D1R 0x08
-#define U300_WDOG_D1R_DISABLE1_DISABLE_TIMER 0x2BADU
-/* WDOG_DISABLE2 Register 32bit (R/W) */
-#define U300_WDOG_D2R 0x0C
-#define U300_WDOG_D2R_DISABLE2_DISABLE_TIMER 0xCAFEU
-#define U300_WDOG_D2R_DISABLE_STATUS_DISABLED 0xDABEU
-#define U300_WDOG_D2R_DISABLE_STATUS_ENABLED 0x0000U
-/* WDOG_STATUS Register 32bit (R/W) */
-#define U300_WDOG_SR 0x10
-#define U300_WDOG_SR_STATUS_TIMED_OUT 0xCFE8U
-#define U300_WDOG_SR_STATUS_NORMAL 0x0000U
-#define U300_WDOG_SR_RESET_STATUS_RESET 0xE8B4U
-/* WDOG_COUNT Register 32bit (R/-) */
-#define U300_WDOG_CR 0x14
-#define U300_WDOG_CR_VALID_IND 0x8000U
-#define U300_WDOG_CR_VALID_STABLE 0x0000U
-#define U300_WDOG_CR_COUNT_VALUE_MASK 0x7FFFU
-/* WDOG_JTAGOVR Register 32bit (R/W) */
-#define U300_WDOG_JOR 0x18
-#define U300_WDOG_JOR_JTAG_MODE_IND 0x0002U
-#define U300_WDOG_JOR_JTAG_WATCHDOG_ENABLE 0x0001U
-/* WDOG_RESTART Register 32bit (-/W) */
-#define U300_WDOG_RR 0x1C
-#define U300_WDOG_RR_RESTART_VALUE_RESUME 0xACEDU
-/* WDOG_IRQ_EVENT Register 32bit (R/W) */
-#define U300_WDOG_IER 0x20
-#define U300_WDOG_IER_WILL_BARK_IRQ_EVENT_IND 0x0001U
-#define U300_WDOG_IER_WILL_BARK_IRQ_ACK_ENABLE 0x0001U
-/* WDOG_IRQ_MASK Register 32bit (R/W) */
-#define U300_WDOG_IMR 0x24
-#define U300_WDOG_IMR_WILL_BARK_IRQ_ENABLE 0x0001U
-/* WDOG_IRQ_FORCE Register 32bit (R/W) */
-#define U300_WDOG_IFR 0x28
-#define U300_WDOG_IFR_WILL_BARK_IRQ_FORCE_ENABLE 0x0001U
-
-/* Default timeout in seconds = 1 minute */
-#define U300_WDOG_DEFAULT_TIMEOUT 60
-
-static unsigned int margin;
-static int irq;
-static void __iomem *virtbase;
-static struct device *parent;
-
-static struct clk *clk;
-
-/*
- * Enabling and disabling functions.
- */
-static void coh901327_enable(u16 timeout)
-{
- u16 val;
- unsigned long freq;
- unsigned long delay_ns;
-
- /* Restart timer if it is disabled */
- val = readw(virtbase + U300_WDOG_D2R);
- if (val == U300_WDOG_D2R_DISABLE_STATUS_DISABLED)
- writew(U300_WDOG_RR_RESTART_VALUE_RESUME,
- virtbase + U300_WDOG_RR);
- /* Acknowledge any pending interrupt so it doesn't just fire off */
- writew(U300_WDOG_IER_WILL_BARK_IRQ_ACK_ENABLE,
- virtbase + U300_WDOG_IER);
- /*
- * The interrupt is cleared in the 32 kHz clock domain.
- * Wait 3 32 kHz cycles for it to take effect
- */
- freq = clk_get_rate(clk);
- delay_ns = DIV_ROUND_UP(1000000000, freq); /* Freq to ns and round up */
- delay_ns = 3 * delay_ns; /* Wait 3 cycles */
- ndelay(delay_ns);
- /* Enable the watchdog interrupt */
- writew(U300_WDOG_IMR_WILL_BARK_IRQ_ENABLE, virtbase + U300_WDOG_IMR);
- /* Activate the watchdog timer */
- writew(timeout, virtbase + U300_WDOG_TR);
- /* Start the watchdog timer */
- writew(U300_WDOG_FR_FEED_RESTART_TIMER, virtbase + U300_WDOG_FR);
- /*
- * Extra read so that this change propagate in the watchdog.
- */
- (void) readw(virtbase + U300_WDOG_CR);
- val = readw(virtbase + U300_WDOG_D2R);
- if (val != U300_WDOG_D2R_DISABLE_STATUS_ENABLED)
- dev_err(parent,
- "%s(): watchdog not enabled! D2R value %04x\n",
- __func__, val);
-}
-
-static void coh901327_disable(void)
-{
- u16 val;
-
- /* Disable the watchdog interrupt if it is active */
- writew(0x0000U, virtbase + U300_WDOG_IMR);
- /* If the watchdog is currently enabled, attempt to disable it */
- val = readw(virtbase + U300_WDOG_D2R);
- if (val != U300_WDOG_D2R_DISABLE_STATUS_DISABLED) {
- writew(U300_WDOG_D1R_DISABLE1_DISABLE_TIMER,
- virtbase + U300_WDOG_D1R);
- writew(U300_WDOG_D2R_DISABLE2_DISABLE_TIMER,
- virtbase + U300_WDOG_D2R);
- /* Write this twice (else problems occur) */
- writew(U300_WDOG_D2R_DISABLE2_DISABLE_TIMER,
- virtbase + U300_WDOG_D2R);
- }
- val = readw(virtbase + U300_WDOG_D2R);
- if (val != U300_WDOG_D2R_DISABLE_STATUS_DISABLED)
- dev_err(parent,
- "%s(): watchdog not disabled! D2R value %04x\n",
- __func__, val);
-}
-
-static int coh901327_start(struct watchdog_device *wdt_dev)
-{
- coh901327_enable(wdt_dev->timeout * 100);
- return 0;
-}
-
-static int coh901327_stop(struct watchdog_device *wdt_dev)
-{
- coh901327_disable();
- return 0;
-}
-
-static int coh901327_ping(struct watchdog_device *wdd)
-{
- /* Feed the watchdog */
- writew(U300_WDOG_FR_FEED_RESTART_TIMER,
- virtbase + U300_WDOG_FR);
- return 0;
-}
-
-static int coh901327_settimeout(struct watchdog_device *wdt_dev,
- unsigned int time)
-{
- wdt_dev->timeout = time;
- /* Set new timeout value */
- writew(time * 100, virtbase + U300_WDOG_TR);
- /* Feed the dog */
- writew(U300_WDOG_FR_FEED_RESTART_TIMER,
- virtbase + U300_WDOG_FR);
- return 0;
-}
-
-static unsigned int coh901327_gettimeleft(struct watchdog_device *wdt_dev)
-{
- u16 val;
-
- /* Read repeatedly until the value is stable! */
- val = readw(virtbase + U300_WDOG_CR);
- while (val & U300_WDOG_CR_VALID_IND)
- val = readw(virtbase + U300_WDOG_CR);
- val &= U300_WDOG_CR_COUNT_VALUE_MASK;
- if (val != 0)
- val /= 100;
-
- return val;
-}
-
-/*
- * This interrupt occurs 10 ms before the watchdog WILL bark.
- */
-static irqreturn_t coh901327_interrupt(int irq, void *data)
-{
- u16 val;
-
- /*
- * Ack IRQ? If this occurs we're FUBAR anyway, so
- * just acknowledge, disable the interrupt and await the imminent end.
- * If you at some point need a host of callbacks to be called
- * when the system is about to watchdog-reset, add them here!
- *
- * NOTE: on future versions of this IP-block, it will be possible
- * to prevent a watchdog reset by feeding the watchdog at this
- * point.
- */
- val = readw(virtbase + U300_WDOG_IER);
- if (val == U300_WDOG_IER_WILL_BARK_IRQ_EVENT_IND)
- writew(U300_WDOG_IER_WILL_BARK_IRQ_ACK_ENABLE,
- virtbase + U300_WDOG_IER);
- writew(0x0000U, virtbase + U300_WDOG_IMR);
- dev_crit(parent, "watchdog is barking!\n");
- return IRQ_HANDLED;
-}
-
-static const struct watchdog_info coh901327_ident = {
- .options = WDIOF_CARDRESET | WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
- .identity = DRV_NAME,
-};
-
-static const struct watchdog_ops coh901327_ops = {
- .owner = THIS_MODULE,
- .start = coh901327_start,
- .stop = coh901327_stop,
- .ping = coh901327_ping,
- .set_timeout = coh901327_settimeout,
- .get_timeleft = coh901327_gettimeleft,
-};
-
-static struct watchdog_device coh901327_wdt = {
- .info = &coh901327_ident,
- .ops = &coh901327_ops,
- /*
- * Max timeout is 327 since the 10ms
- * timeout register is max
- * 0x7FFF = 327670ms ~= 327s.
- */
- .min_timeout = 1,
- .max_timeout = 327,
- .timeout = U300_WDOG_DEFAULT_TIMEOUT,
-};
-
-static int __init coh901327_probe(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- int ret;
- u16 val;
-
- parent = dev;
-
- virtbase = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(virtbase))
- return PTR_ERR(virtbase);
-
- clk = clk_get(dev, NULL);
- if (IS_ERR(clk)) {
- ret = PTR_ERR(clk);
- dev_err(dev, "could not get clock\n");
- return ret;
- }
- ret = clk_prepare_enable(clk);
- if (ret) {
- dev_err(dev, "could not prepare and enable clock\n");
- goto out_no_clk_enable;
- }
-
- val = readw(virtbase + U300_WDOG_SR);
- switch (val) {
- case U300_WDOG_SR_STATUS_TIMED_OUT:
- dev_info(dev, "watchdog timed out since last chip reset!\n");
- coh901327_wdt.bootstatus |= WDIOF_CARDRESET;
- /* Status will be cleared below */
- break;
- case U300_WDOG_SR_STATUS_NORMAL:
- dev_info(dev, "in normal status, no timeouts have occurred.\n");
- break;
- default:
- dev_info(dev, "contains an illegal status code (%08x)\n", val);
- break;
- }
-
- val = readw(virtbase + U300_WDOG_D2R);
- switch (val) {
- case U300_WDOG_D2R_DISABLE_STATUS_DISABLED:
- dev_info(dev, "currently disabled.\n");
- break;
- case U300_WDOG_D2R_DISABLE_STATUS_ENABLED:
- dev_info(dev, "currently enabled! (disabling it now)\n");
- coh901327_disable();
- break;
- default:
- dev_err(dev, "contains an illegal enable/disable code (%08x)\n",
- val);
- break;
- }
-
- /* Reset the watchdog */
- writew(U300_WDOG_SR_RESET_STATUS_RESET, virtbase + U300_WDOG_SR);
-
- irq = platform_get_irq(pdev, 0);
- if (request_irq(irq, coh901327_interrupt, 0,
- DRV_NAME " Bark", pdev)) {
- ret = -EIO;
- goto out_no_irq;
- }
-
- watchdog_init_timeout(&coh901327_wdt, margin, dev);
-
- coh901327_wdt.parent = dev;
- ret = watchdog_register_device(&coh901327_wdt);
- if (ret)
- goto out_no_wdog;
-
- dev_info(dev, "initialized. (timeout=%d sec)\n",
- coh901327_wdt.timeout);
- return 0;
-
-out_no_wdog:
- free_irq(irq, pdev);
-out_no_irq:
- clk_disable_unprepare(clk);
-out_no_clk_enable:
- clk_put(clk);
- return ret;
-}
-
-#ifdef CONFIG_PM
-
-static u16 wdogenablestore;
-static u16 irqmaskstore;
-
-static int coh901327_suspend(struct platform_device *pdev, pm_message_t state)
-{
- irqmaskstore = readw(virtbase + U300_WDOG_IMR) & 0x0001U;
- wdogenablestore = readw(virtbase + U300_WDOG_D2R);
- /* If watchdog is on, disable it here and now */
- if (wdogenablestore == U300_WDOG_D2R_DISABLE_STATUS_ENABLED)
- coh901327_disable();
- return 0;
-}
-
-static int coh901327_resume(struct platform_device *pdev)
-{
- /* Restore the watchdog interrupt */
- writew(irqmaskstore, virtbase + U300_WDOG_IMR);
- if (wdogenablestore == U300_WDOG_D2R_DISABLE_STATUS_ENABLED) {
- /* Restart the watchdog timer */
- writew(U300_WDOG_RR_RESTART_VALUE_RESUME,
- virtbase + U300_WDOG_RR);
- writew(U300_WDOG_FR_FEED_RESTART_TIMER,
- virtbase + U300_WDOG_FR);
- }
- return 0;
-}
-#else
-#define coh901327_suspend NULL
-#define coh901327_resume NULL
-#endif
-
-/*
- * Mistreating the watchdog is the only way to perform a software reset of the
- * system on EMP platforms. So we implement this and export a symbol for it.
- */
-void coh901327_watchdog_reset(void)
-{
- /* Enable even if on JTAG too */
- writew(U300_WDOG_JOR_JTAG_WATCHDOG_ENABLE,
- virtbase + U300_WDOG_JOR);
- /*
- * Timeout = 5s, we have to wait for the watchdog reset to
- * actually take place: the watchdog will be reloaded with the
- * default value immediately, so we HAVE to reboot and get back
- * into the kernel in 30s, or the device will reboot again!
- * The boot loader will typically deactivate the watchdog, so we
- * need time enough for the boot loader to get to the point of
- * deactivating the watchdog before it is shut down by it.
- *
- * NOTE: on future versions of the watchdog, this restriction is
- * gone: the watchdog will be reloaded with a default value (1 min)
- * instead of last value, and you can conveniently set the watchdog
- * timeout to 10ms (value = 1) without any problems.
- */
- coh901327_enable(500);
- /* Return and await doom */
-}
-
-static const struct of_device_id coh901327_dt_match[] = {
- { .compatible = "stericsson,coh901327" },
- {},
-};
-
-static struct platform_driver coh901327_driver = {
- .driver = {
- .name = "coh901327_wdog",
- .of_match_table = coh901327_dt_match,
- .suppress_bind_attrs = true,
- },
- .suspend = coh901327_suspend,
- .resume = coh901327_resume,
-};
-builtin_platform_driver_probe(coh901327_driver, coh901327_probe);
-
-/* not really modular, but ... */
-module_param(margin, uint, 0);
-MODULE_PARM_DESC(margin, "Watchdog margin in seconds (default 60s)");
diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c
index cbd1498ff015..22ddba3802ef 100644
--- a/drivers/watchdog/hpwdt.c
+++ b/drivers/watchdog/hpwdt.c
@@ -123,7 +123,7 @@ static int hpwdt_settimeout(struct watchdog_device *wdd, unsigned int val)
if (val <= wdd->pretimeout) {
dev_dbg(wdd->parent, "pretimeout < timeout. Setting to zero\n");
wdd->pretimeout = 0;
- pretimeout = 0;
+ pretimeout = false;
if (watchdog_active(wdd))
hpwdt_start(wdd);
}
@@ -336,13 +336,13 @@ static int hpwdt_init_one(struct pci_dev *dev,
watchdog_init_timeout(&hpwdt_dev, soft_margin, NULL);
if (is_kdump_kernel()) {
- pretimeout = 0;
+ pretimeout = false;
kdumptimeout = 0;
}
if (pretimeout && hpwdt_dev.timeout <= PRETIMEOUT_SEC) {
dev_warn(&dev->dev, "timeout <= pretimeout. Setting pretimeout to zero\n");
- pretimeout = 0;
+ pretimeout = false;
}
hpwdt_dev.pretimeout = pretimeout ? PRETIMEOUT_SEC : 0;
kdumptimeout = min(kdumptimeout, HPWDT_MAX_TIMER);
diff --git a/drivers/watchdog/intel-mid_wdt.c b/drivers/watchdog/intel-mid_wdt.c
index 1ae03b64ef8b..9b2173f765c8 100644
--- a/drivers/watchdog/intel-mid_wdt.c
+++ b/drivers/watchdog/intel-mid_wdt.c
@@ -154,6 +154,10 @@ static int mid_wdt_probe(struct platform_device *pdev)
watchdog_set_nowayout(wdt_dev, WATCHDOG_NOWAYOUT);
watchdog_set_drvdata(wdt_dev, mid);
+ mid->scu = devm_intel_scu_ipc_dev_get(dev);
+ if (!mid->scu)
+ return -EPROBE_DEFER;
+
ret = devm_request_irq(dev, pdata->irq, mid_wdt_irq,
IRQF_SHARED | IRQF_NO_SUSPEND, "watchdog",
wdt_dev);
@@ -162,10 +166,6 @@ static int mid_wdt_probe(struct platform_device *pdev)
return ret;
}
- mid->scu = devm_intel_scu_ipc_dev_get(dev);
- if (!mid->scu)
- return -EPROBE_DEFER;
-
/*
* The firmware followed by U-Boot leaves the watchdog running
* with the default threshold which may vary. When we get here
diff --git a/drivers/watchdog/intel_scu_watchdog.c b/drivers/watchdog/intel_scu_watchdog.c
deleted file mode 100644
index 804e35940983..000000000000
--- a/drivers/watchdog/intel_scu_watchdog.c
+++ /dev/null
@@ -1,533 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel_SCU 0.2: An Intel SCU IOH Based Watchdog Device
- * for Intel part #(s):
- * - AF82MP20 PCH
- *
- * Copyright (C) 2009-2010 Intel Corporation. All rights reserved.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/compiler.h>
-#include <linux/kernel.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/fs.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/jiffies.h>
-#include <linux/uaccess.h>
-#include <linux/slab.h>
-#include <linux/io.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/sched.h>
-#include <linux/signal.h>
-#include <linux/sfi.h>
-#include <asm/irq.h>
-#include <linux/atomic.h>
-#include <asm/intel_scu_ipc.h>
-#include <asm/apb_timer.h>
-#include <asm/intel-mid.h>
-
-#include "intel_scu_watchdog.h"
-
-/* Bounds number of times we will retry loading time count */
-/* This retry is a work around for a silicon bug. */
-#define MAX_RETRY 16
-
-#define IPC_SET_WATCHDOG_TIMER 0xF8
-
-static int timer_margin = DEFAULT_SOFT_TO_HARD_MARGIN;
-module_param(timer_margin, int, 0);
-MODULE_PARM_DESC(timer_margin,
- "Watchdog timer margin"
- "Time between interrupt and resetting the system"
- "The range is from 1 to 160"
- "This is the time for all keep alives to arrive");
-
-static int timer_set = DEFAULT_TIME;
-module_param(timer_set, int, 0);
-MODULE_PARM_DESC(timer_set,
- "Default Watchdog timer setting"
- "Complete cycle time"
- "The range is from 1 to 170"
- "This is the time for all keep alives to arrive");
-
-/* After watchdog device is closed, check force_boot. If:
- * force_boot == 0, then force boot on next watchdog interrupt after close,
- * force_boot == 1, then force boot immediately when device is closed.
- */
-static int force_boot;
-module_param(force_boot, int, 0);
-MODULE_PARM_DESC(force_boot,
- "A value of 1 means that the driver will reboot"
- "the system immediately if the /dev/watchdog device is closed"
- "A value of 0 means that when /dev/watchdog device is closed"
- "the watchdog timer will be refreshed for one more interval"
- "of length: timer_set. At the end of this interval, the"
- "watchdog timer will reset the system."
- );
-
-/* there is only one device in the system now; this can be made into
- * an array in the future if we have more than one device */
-
-static struct intel_scu_watchdog_dev watchdog_device;
-
-/* Forces restart, if force_reboot is set */
-static void watchdog_fire(void)
-{
- if (force_boot) {
- pr_crit("Initiating system reboot\n");
- emergency_restart();
- pr_crit("Reboot didn't ?????\n");
- }
-
- else {
- pr_crit("Immediate Reboot Disabled\n");
- pr_crit("System will reset when watchdog timer times out!\n");
- }
-}
-
-static int check_timer_margin(int new_margin)
-{
- if ((new_margin < MIN_TIME_CYCLE) ||
- (new_margin > MAX_TIME - timer_set)) {
- pr_debug("value of new_margin %d is out of the range %d to %d\n",
- new_margin, MIN_TIME_CYCLE, MAX_TIME - timer_set);
- return -EINVAL;
- }
- return 0;
-}
-
-/*
- * IPC operations
- */
-static int watchdog_set_ipc(int soft_threshold, int threshold)
-{
- u32 *ipc_wbuf;
- u8 cbuf[16] = { '\0' };
- int ipc_ret = 0;
-
- ipc_wbuf = (u32 *)&cbuf;
- ipc_wbuf[0] = soft_threshold;
- ipc_wbuf[1] = threshold;
-
- ipc_ret = intel_scu_ipc_command(
- IPC_SET_WATCHDOG_TIMER,
- 0,
- ipc_wbuf,
- 2,
- NULL,
- 0);
-
- if (ipc_ret != 0)
- pr_err("Error setting SCU watchdog timer: %x\n", ipc_ret);
-
- return ipc_ret;
-};
-
-/*
- * Intel_SCU operations
- */
-
-/* timer interrupt handler */
-static irqreturn_t watchdog_timer_interrupt(int irq, void *dev_id)
-{
- int int_status;
- int_status = ioread32(watchdog_device.timer_interrupt_status_addr);
-
- pr_debug("irq, int_status: %x\n", int_status);
-
- if (int_status != 0)
- return IRQ_NONE;
-
- /* has the timer been started? If not, then this is spurious */
- if (watchdog_device.timer_started == 0) {
- pr_debug("spurious interrupt received\n");
- return IRQ_HANDLED;
- }
-
- /* temporarily disable the timer */
- iowrite32(0x00000002, watchdog_device.timer_control_addr);
-
- /* set the timer to the threshold */
- iowrite32(watchdog_device.threshold,
- watchdog_device.timer_load_count_addr);
-
- /* allow the timer to run */
- iowrite32(0x00000003, watchdog_device.timer_control_addr);
-
- return IRQ_HANDLED;
-}
-
-static int intel_scu_keepalive(void)
-{
-
- /* read eoi register - clears interrupt */
- ioread32(watchdog_device.timer_clear_interrupt_addr);
-
- /* temporarily disable the timer */
- iowrite32(0x00000002, watchdog_device.timer_control_addr);
-
- /* set the timer to the soft_threshold */
- iowrite32(watchdog_device.soft_threshold,
- watchdog_device.timer_load_count_addr);
-
- /* allow the timer to run */
- iowrite32(0x00000003, watchdog_device.timer_control_addr);
-
- return 0;
-}
-
-static int intel_scu_stop(void)
-{
- iowrite32(0, watchdog_device.timer_control_addr);
- return 0;
-}
-
-static int intel_scu_set_heartbeat(u32 t)
-{
- int ipc_ret;
- int retry_count;
- u32 soft_value;
- u32 hw_value;
-
- watchdog_device.timer_set = t;
- watchdog_device.threshold =
- timer_margin * watchdog_device.timer_tbl_ptr->freq_hz;
- watchdog_device.soft_threshold =
- (watchdog_device.timer_set - timer_margin)
- * watchdog_device.timer_tbl_ptr->freq_hz;
-
- pr_debug("set_heartbeat: timer freq is %d\n",
- watchdog_device.timer_tbl_ptr->freq_hz);
- pr_debug("set_heartbeat: timer_set is %x (hex)\n",
- watchdog_device.timer_set);
- pr_debug("set_heartbeat: timer_margin is %x (hex)\n", timer_margin);
- pr_debug("set_heartbeat: threshold is %x (hex)\n",
- watchdog_device.threshold);
- pr_debug("set_heartbeat: soft_threshold is %x (hex)\n",
- watchdog_device.soft_threshold);
-
- /* Adjust thresholds by FREQ_ADJUSTMENT factor, to make the */
- /* watchdog timing come out right. */
- watchdog_device.threshold =
- watchdog_device.threshold / FREQ_ADJUSTMENT;
- watchdog_device.soft_threshold =
- watchdog_device.soft_threshold / FREQ_ADJUSTMENT;
-
- /* temporarily disable the timer */
- iowrite32(0x00000002, watchdog_device.timer_control_addr);
-
- /* send the threshold and soft_threshold via IPC to the processor */
- ipc_ret = watchdog_set_ipc(watchdog_device.soft_threshold,
- watchdog_device.threshold);
-
- if (ipc_ret != 0) {
- /* Make sure the watchdog timer is stopped */
- intel_scu_stop();
- return ipc_ret;
- }
-
- /* Soft Threshold set loop. Early versions of silicon did */
- /* not always set this count correctly. This loop checks */
- /* the value and retries if it was not set correctly. */
-
- retry_count = 0;
- soft_value = watchdog_device.soft_threshold & 0xFFFF0000;
- do {
-
- /* Make sure timer is stopped */
- intel_scu_stop();
-
- if (MAX_RETRY < retry_count++) {
- /* Unable to set timer value */
- pr_err("Unable to set timer\n");
- return -ENODEV;
- }
-
- /* set the timer to the soft threshold */
- iowrite32(watchdog_device.soft_threshold,
- watchdog_device.timer_load_count_addr);
-
- /* read count value before starting timer */
- ioread32(watchdog_device.timer_load_count_addr);
-
- /* Start the timer */
- iowrite32(0x00000003, watchdog_device.timer_control_addr);
-
- /* read the value the time loaded into its count reg */
- hw_value = ioread32(watchdog_device.timer_load_count_addr);
- hw_value = hw_value & 0xFFFF0000;
-
-
- } while (soft_value != hw_value);
-
- watchdog_device.timer_started = 1;
-
- return 0;
-}
-
-/*
- * /dev/watchdog handling
- */
-
-static int intel_scu_open(struct inode *inode, struct file *file)
-{
-
- /* Set flag to indicate that watchdog device is open */
- if (test_and_set_bit(0, &watchdog_device.driver_open))
- return -EBUSY;
-
- /* Check for reopen of driver. Reopens are not allowed */
- if (watchdog_device.driver_closed)
- return -EPERM;
-
- return stream_open(inode, file);
-}
-
-static int intel_scu_release(struct inode *inode, struct file *file)
-{
- /*
- * This watchdog should not be closed, after the timer
- * is started with the WDIPC_SETTIMEOUT ioctl
- * If force_boot is set watchdog_fire() will cause an
- * immediate reset. If force_boot is not set, the watchdog
- * timer is refreshed for one more interval. At the end
- * of that interval, the watchdog timer will reset the system.
- */
-
- if (!test_and_clear_bit(0, &watchdog_device.driver_open)) {
- pr_debug("intel_scu_release, without open\n");
- return -ENOTTY;
- }
-
- if (!watchdog_device.timer_started) {
- /* Just close, since timer has not been started */
- pr_debug("closed, without starting timer\n");
- return 0;
- }
-
- pr_crit("Unexpected close of /dev/watchdog!\n");
-
- /* Since the timer was started, prevent future reopens */
- watchdog_device.driver_closed = 1;
-
- /* Refresh the timer for one more interval */
- intel_scu_keepalive();
-
- /* Reboot system (if force_boot is set) */
- watchdog_fire();
-
- /* We should only reach this point if force_boot is not set */
- return 0;
-}
-
-static ssize_t intel_scu_write(struct file *file,
- char const *data,
- size_t len,
- loff_t *ppos)
-{
-
- if (watchdog_device.timer_started)
- /* Watchdog already started, keep it alive */
- intel_scu_keepalive();
- else
- /* Start watchdog with timer value set by init */
- intel_scu_set_heartbeat(watchdog_device.timer_set);
-
- return len;
-}
-
-static long intel_scu_ioctl(struct file *file,
- unsigned int cmd,
- unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- u32 __user *p = argp;
- u32 new_margin;
-
-
- static const struct watchdog_info ident = {
- .options = WDIOF_SETTIMEOUT
- | WDIOF_KEEPALIVEPING,
- .firmware_version = 0, /* @todo Get from SCU via
- ipc_get_scu_fw_version()? */
- .identity = "Intel_SCU IOH Watchdog" /* len < 32 */
- };
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp,
- &ident,
- sizeof(ident)) ? -EFAULT : 0;
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
- case WDIOC_KEEPALIVE:
- intel_scu_keepalive();
-
- return 0;
- case WDIOC_SETTIMEOUT:
- if (get_user(new_margin, p))
- return -EFAULT;
-
- if (check_timer_margin(new_margin))
- return -EINVAL;
-
- if (intel_scu_set_heartbeat(new_margin))
- return -EINVAL;
- return 0;
- case WDIOC_GETTIMEOUT:
- return put_user(watchdog_device.soft_threshold, p);
-
- default:
- return -ENOTTY;
- }
-}
-
-/*
- * Notifier for system down
- */
-static int intel_scu_notify_sys(struct notifier_block *this,
- unsigned long code,
- void *another_unused)
-{
- if (code == SYS_DOWN || code == SYS_HALT)
- /* Turn off the watchdog timer. */
- intel_scu_stop();
- return NOTIFY_DONE;
-}
-
-/*
- * Kernel Interfaces
- */
-static const struct file_operations intel_scu_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = intel_scu_write,
- .unlocked_ioctl = intel_scu_ioctl,
- .compat_ioctl = compat_ptr_ioctl,
- .open = intel_scu_open,
- .release = intel_scu_release,
-};
-
-static int __init intel_scu_watchdog_init(void)
-{
- int ret;
- u32 __iomem *tmp_addr;
-
- /*
- * We don't really need to check this as the SFI timer get will fail
- * but if we do so we can exit with a clearer reason and no noise.
- *
- * If it isn't an intel MID device then it doesn't have this watchdog
- */
- if (!intel_mid_identify_cpu())
- return -ENODEV;
-
- /* Check boot parameters to verify that their initial values */
- /* are in range. */
- /* Check value of timer_set boot parameter */
- if ((timer_set < MIN_TIME_CYCLE) ||
- (timer_set > MAX_TIME - MIN_TIME_CYCLE)) {
- pr_err("value of timer_set %x (hex) is out of range from %x to %x (hex)\n",
- timer_set, MIN_TIME_CYCLE, MAX_TIME - MIN_TIME_CYCLE);
- return -EINVAL;
- }
-
- /* Check value of timer_margin boot parameter */
- if (check_timer_margin(timer_margin))
- return -EINVAL;
-
- watchdog_device.timer_tbl_ptr = sfi_get_mtmr(sfi_mtimer_num-1);
-
- if (watchdog_device.timer_tbl_ptr == NULL) {
- pr_debug("timer is not available\n");
- return -ENODEV;
- }
- /* make sure the timer exists */
- if (watchdog_device.timer_tbl_ptr->phys_addr == 0) {
- pr_debug("timer %d does not have valid physical memory\n",
- sfi_mtimer_num);
- return -ENODEV;
- }
-
- if (watchdog_device.timer_tbl_ptr->irq == 0) {
- pr_debug("timer %d invalid irq\n", sfi_mtimer_num);
- return -ENODEV;
- }
-
- tmp_addr = ioremap(watchdog_device.timer_tbl_ptr->phys_addr,
- 20);
-
- if (tmp_addr == NULL) {
- pr_debug("timer unable to ioremap\n");
- return -ENOMEM;
- }
-
- watchdog_device.timer_load_count_addr = tmp_addr++;
- watchdog_device.timer_current_value_addr = tmp_addr++;
- watchdog_device.timer_control_addr = tmp_addr++;
- watchdog_device.timer_clear_interrupt_addr = tmp_addr++;
- watchdog_device.timer_interrupt_status_addr = tmp_addr++;
-
- /* Set the default time values in device structure */
-
- watchdog_device.timer_set = timer_set;
- watchdog_device.threshold =
- timer_margin * watchdog_device.timer_tbl_ptr->freq_hz;
- watchdog_device.soft_threshold =
- (watchdog_device.timer_set - timer_margin)
- * watchdog_device.timer_tbl_ptr->freq_hz;
-
-
- watchdog_device.intel_scu_notifier.notifier_call =
- intel_scu_notify_sys;
-
- ret = register_reboot_notifier(&watchdog_device.intel_scu_notifier);
- if (ret) {
- pr_err("cannot register notifier %d)\n", ret);
- goto register_reboot_error;
- }
-
- watchdog_device.miscdev.minor = WATCHDOG_MINOR;
- watchdog_device.miscdev.name = "watchdog";
- watchdog_device.miscdev.fops = &intel_scu_fops;
-
- ret = misc_register(&watchdog_device.miscdev);
- if (ret) {
- pr_err("cannot register miscdev %d err =%d\n",
- WATCHDOG_MINOR, ret);
- goto misc_register_error;
- }
-
- ret = request_irq((unsigned int)watchdog_device.timer_tbl_ptr->irq,
- watchdog_timer_interrupt,
- IRQF_SHARED, "watchdog",
- &watchdog_device.timer_load_count_addr);
- if (ret) {
- pr_err("error requesting irq %d\n", ret);
- goto request_irq_error;
- }
- /* Make sure timer is disabled before returning */
- intel_scu_stop();
- return 0;
-
-/* error cleanup */
-
-request_irq_error:
- misc_deregister(&watchdog_device.miscdev);
-misc_register_error:
- unregister_reboot_notifier(&watchdog_device.intel_scu_notifier);
-register_reboot_error:
- intel_scu_stop();
- iounmap(watchdog_device.timer_load_count_addr);
- return ret;
-}
-late_initcall(intel_scu_watchdog_init);
diff --git a/drivers/watchdog/intel_scu_watchdog.h b/drivers/watchdog/intel_scu_watchdog.h
deleted file mode 100644
index fb12a25ee417..000000000000
--- a/drivers/watchdog/intel_scu_watchdog.h
+++ /dev/null
@@ -1,50 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Intel_SCU 0.2: An Intel SCU IOH Based Watchdog Device
- * for Intel part #(s):
- * - AF82MP20 PCH
- *
- * Copyright (C) 2009-2010 Intel Corporation. All rights reserved.
- */
-
-#ifndef __INTEL_SCU_WATCHDOG_H
-#define __INTEL_SCU_WATCHDOG_H
-
-#define WDT_VER "0.3"
-
-/* minimum time between interrupts */
-#define MIN_TIME_CYCLE 1
-
-/* Time from warning to reboot is 2 seconds */
-#define DEFAULT_SOFT_TO_HARD_MARGIN 2
-
-#define MAX_TIME 170
-
-#define DEFAULT_TIME 5
-
-#define MAX_SOFT_TO_HARD_MARGIN (MAX_TIME-MIN_TIME_CYCLE)
-
-/* Ajustment to clock tick frequency to make timing come out right */
-#define FREQ_ADJUSTMENT 8
-
-struct intel_scu_watchdog_dev {
- ulong driver_open;
- ulong driver_closed;
- u32 timer_started;
- u32 timer_set;
- u32 threshold;
- u32 soft_threshold;
- u32 __iomem *timer_load_count_addr;
- u32 __iomem *timer_current_value_addr;
- u32 __iomem *timer_control_addr;
- u32 __iomem *timer_clear_interrupt_addr;
- u32 __iomem *timer_interrupt_status_addr;
- struct sfi_timer_table_entry *timer_tbl_ptr;
- struct notifier_block intel_scu_notifier;
- struct miscdevice miscdev;
-};
-
-extern int sfi_mtimer_num;
-
-/* extern struct sfi_timer_table_entry *sfi_get_mtmr(int hint); */
-#endif /* __INTEL_SCU_WATCHDOG_H */
diff --git a/drivers/watchdog/it8712f_wdt.c b/drivers/watchdog/it8712f_wdt.c
index 9b89d2f09568..3ce6a58bd81e 100644
--- a/drivers/watchdog/it8712f_wdt.c
+++ b/drivers/watchdog/it8712f_wdt.c
@@ -31,7 +31,6 @@
#include <linux/io.h>
#include <linux/ioport.h>
-#define DEBUG
#define NAME "it8712f_wdt"
MODULE_AUTHOR("Jorge Boncompte - DTI2 <jorge@dti2.net>");
diff --git a/drivers/watchdog/keembay_wdt.c b/drivers/watchdog/keembay_wdt.c
new file mode 100644
index 000000000000..547d3fea33ff
--- /dev/null
+++ b/drivers/watchdog/keembay_wdt.c
@@ -0,0 +1,286 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Watchdog driver for Intel Keem Bay non-secure watchdog.
+ *
+ * Copyright (C) 2020 Intel Corporation
+ */
+
+#include <linux/arm-smccc.h>
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/limits.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+#include <linux/watchdog.h>
+
+/* Non-secure watchdog register offsets */
+#define TIM_WATCHDOG 0x0
+#define TIM_WATCHDOG_INT_THRES 0x4
+#define TIM_WDOG_EN 0x8
+#define TIM_SAFE 0xc
+
+#define WDT_ISR_MASK GENMASK(9, 8)
+#define WDT_ISR_CLEAR 0x8200ff18
+#define WDT_UNLOCK 0xf1d0dead
+#define WDT_LOAD_MAX U32_MAX
+#define WDT_LOAD_MIN 1
+#define WDT_TIMEOUT 5
+
+static unsigned int timeout = WDT_TIMEOUT;
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout, "Watchdog timeout period in seconds (default = "
+ __MODULE_STRING(WDT_TIMEOUT) ")");
+
+static bool nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, bool, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default = "
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+struct keembay_wdt {
+ struct watchdog_device wdd;
+ struct clk *clk;
+ unsigned int rate;
+ int to_irq;
+ int th_irq;
+ void __iomem *base;
+};
+
+static inline u32 keembay_wdt_readl(struct keembay_wdt *wdt, u32 offset)
+{
+ return readl(wdt->base + offset);
+}
+
+static inline void keembay_wdt_writel(struct keembay_wdt *wdt, u32 offset, u32 val)
+{
+ writel(WDT_UNLOCK, wdt->base + TIM_SAFE);
+ writel(val, wdt->base + offset);
+}
+
+static void keembay_wdt_set_timeout_reg(struct watchdog_device *wdog)
+{
+ struct keembay_wdt *wdt = watchdog_get_drvdata(wdog);
+
+ keembay_wdt_writel(wdt, TIM_WATCHDOG, wdog->timeout * wdt->rate);
+}
+
+static void keembay_wdt_set_pretimeout_reg(struct watchdog_device *wdog)
+{
+ struct keembay_wdt *wdt = watchdog_get_drvdata(wdog);
+ u32 th_val = 0;
+
+ if (wdog->pretimeout)
+ th_val = wdog->timeout - wdog->pretimeout;
+
+ keembay_wdt_writel(wdt, TIM_WATCHDOG_INT_THRES, th_val * wdt->rate);
+}
+
+static int keembay_wdt_start(struct watchdog_device *wdog)
+{
+ struct keembay_wdt *wdt = watchdog_get_drvdata(wdog);
+
+ keembay_wdt_set_timeout_reg(wdog);
+ keembay_wdt_writel(wdt, TIM_WDOG_EN, 1);
+
+ return 0;
+}
+
+static int keembay_wdt_stop(struct watchdog_device *wdog)
+{
+ struct keembay_wdt *wdt = watchdog_get_drvdata(wdog);
+
+ keembay_wdt_writel(wdt, TIM_WDOG_EN, 0);
+
+ return 0;
+}
+
+static int keembay_wdt_ping(struct watchdog_device *wdog)
+{
+ keembay_wdt_set_timeout_reg(wdog);
+
+ return 0;
+}
+
+static int keembay_wdt_set_timeout(struct watchdog_device *wdog, u32 t)
+{
+ wdog->timeout = t;
+ keembay_wdt_set_timeout_reg(wdog);
+
+ return 0;
+}
+
+static int keembay_wdt_set_pretimeout(struct watchdog_device *wdog, u32 t)
+{
+ if (t > wdog->timeout)
+ return -EINVAL;
+
+ wdog->pretimeout = t;
+ keembay_wdt_set_pretimeout_reg(wdog);
+
+ return 0;
+}
+
+static unsigned int keembay_wdt_get_timeleft(struct watchdog_device *wdog)
+{
+ struct keembay_wdt *wdt = watchdog_get_drvdata(wdog);
+
+ return keembay_wdt_readl(wdt, TIM_WATCHDOG) / wdt->rate;
+}
+
+/*
+ * SMC call is used to clear the interrupt bits, because the TIM_GEN_CONFIG
+ * register is in the secure bank.
+ */
+static irqreturn_t keembay_wdt_to_isr(int irq, void *dev_id)
+{
+ struct keembay_wdt *wdt = dev_id;
+ struct arm_smccc_res res;
+
+ keembay_wdt_writel(wdt, TIM_WATCHDOG, 1);
+ arm_smccc_smc(WDT_ISR_CLEAR, WDT_ISR_MASK, 0, 0, 0, 0, 0, 0, &res);
+ dev_crit(wdt->wdd.parent, "Intel Keem Bay non-sec wdt timeout.\n");
+ emergency_restart();
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t keembay_wdt_th_isr(int irq, void *dev_id)
+{
+ struct keembay_wdt *wdt = dev_id;
+ struct arm_smccc_res res;
+
+ arm_smccc_smc(WDT_ISR_CLEAR, WDT_ISR_MASK, 0, 0, 0, 0, 0, 0, &res);
+ dev_crit(wdt->wdd.parent, "Intel Keem Bay non-sec wdt pre-timeout.\n");
+ watchdog_notify_pretimeout(&wdt->wdd);
+
+ return IRQ_HANDLED;
+}
+
+static const struct watchdog_info keembay_wdt_info = {
+ .identity = "Intel Keem Bay Watchdog Timer",
+ .options = WDIOF_SETTIMEOUT |
+ WDIOF_PRETIMEOUT |
+ WDIOF_MAGICCLOSE |
+ WDIOF_KEEPALIVEPING,
+};
+
+static const struct watchdog_ops keembay_wdt_ops = {
+ .owner = THIS_MODULE,
+ .start = keembay_wdt_start,
+ .stop = keembay_wdt_stop,
+ .ping = keembay_wdt_ping,
+ .set_timeout = keembay_wdt_set_timeout,
+ .set_pretimeout = keembay_wdt_set_pretimeout,
+ .get_timeleft = keembay_wdt_get_timeleft,
+};
+
+static int keembay_wdt_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct keembay_wdt *wdt;
+ int ret;
+
+ wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);
+ if (!wdt)
+ return -ENOMEM;
+
+ wdt->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(wdt->base))
+ return PTR_ERR(wdt->base);
+
+ /* we do not need to enable the clock as it is enabled by default */
+ wdt->clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(wdt->clk))
+ return dev_err_probe(dev, PTR_ERR(wdt->clk), "Failed to get clock\n");
+
+ wdt->rate = clk_get_rate(wdt->clk);
+ if (!wdt->rate)
+ return dev_err_probe(dev, -EINVAL, "Failed to get clock rate\n");
+
+ wdt->th_irq = platform_get_irq_byname(pdev, "threshold");
+ if (wdt->th_irq < 0)
+ return dev_err_probe(dev, wdt->th_irq, "Failed to get IRQ for threshold\n");
+
+ ret = devm_request_irq(dev, wdt->th_irq, keembay_wdt_th_isr, 0,
+ "keembay-wdt", wdt);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to request IRQ for threshold\n");
+
+ wdt->to_irq = platform_get_irq_byname(pdev, "timeout");
+ if (wdt->to_irq < 0)
+ return dev_err_probe(dev, wdt->to_irq, "Failed to get IRQ for timeout\n");
+
+ ret = devm_request_irq(dev, wdt->to_irq, keembay_wdt_to_isr, 0,
+ "keembay-wdt", wdt);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to request IRQ for timeout\n");
+
+ wdt->wdd.parent = dev;
+ wdt->wdd.info = &keembay_wdt_info;
+ wdt->wdd.ops = &keembay_wdt_ops;
+ wdt->wdd.min_timeout = WDT_LOAD_MIN;
+ wdt->wdd.max_timeout = WDT_LOAD_MAX / wdt->rate;
+ wdt->wdd.timeout = WDT_TIMEOUT;
+
+ watchdog_set_drvdata(&wdt->wdd, wdt);
+ watchdog_set_nowayout(&wdt->wdd, nowayout);
+ watchdog_init_timeout(&wdt->wdd, timeout, dev);
+ keembay_wdt_set_timeout(&wdt->wdd, wdt->wdd.timeout);
+
+ ret = devm_watchdog_register_device(dev, &wdt->wdd);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to register watchdog device.\n");
+
+ platform_set_drvdata(pdev, wdt);
+ dev_info(dev, "Initial timeout %d sec%s.\n",
+ wdt->wdd.timeout, nowayout ? ", nowayout" : "");
+
+ return 0;
+}
+
+static int __maybe_unused keembay_wdt_suspend(struct device *dev)
+{
+ struct keembay_wdt *wdt = dev_get_drvdata(dev);
+
+ if (watchdog_active(&wdt->wdd))
+ return keembay_wdt_stop(&wdt->wdd);
+
+ return 0;
+}
+
+static int __maybe_unused keembay_wdt_resume(struct device *dev)
+{
+ struct keembay_wdt *wdt = dev_get_drvdata(dev);
+
+ if (watchdog_active(&wdt->wdd))
+ return keembay_wdt_start(&wdt->wdd);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(keembay_wdt_pm_ops, keembay_wdt_suspend,
+ keembay_wdt_resume);
+
+static const struct of_device_id keembay_wdt_match[] = {
+ { .compatible = "intel,keembay-wdt" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, keembay_wdt_match);
+
+static struct platform_driver keembay_wdt_driver = {
+ .probe = keembay_wdt_probe,
+ .driver = {
+ .name = "keembay_wdt",
+ .of_match_table = keembay_wdt_match,
+ .pm = &keembay_wdt_pm_ops,
+ },
+};
+
+module_platform_driver(keembay_wdt_driver);
+
+MODULE_DESCRIPTION("Intel Keem Bay SoC watchdog driver");
+MODULE_AUTHOR("Wan Ahmad Zainie <wan.ahmad.zainie.wan.mohamad@intel.com");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/watchdog/mei_wdt.c b/drivers/watchdog/mei_wdt.c
index 53165e49c298..e023d7d90d66 100644
--- a/drivers/watchdog/mei_wdt.c
+++ b/drivers/watchdog/mei_wdt.c
@@ -382,6 +382,7 @@ static int mei_wdt_register(struct mei_wdt *wdt)
watchdog_set_drvdata(&wdt->wdd, wdt);
watchdog_stop_on_reboot(&wdt->wdd);
+ watchdog_stop_on_unregister(&wdt->wdd);
ret = watchdog_register_device(&wdt->wdd);
if (ret)
diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c
index d6a6393f609d..97ca993bd009 100644
--- a/drivers/watchdog/mtk_wdt.c
+++ b/drivers/watchdog/mtk_wdt.c
@@ -11,6 +11,7 @@
#include <dt-bindings/reset-controller/mt2712-resets.h>
#include <dt-bindings/reset-controller/mt8183-resets.h>
+#include <dt-bindings/reset-controller/mt8192-resets.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/init.h>
@@ -76,6 +77,10 @@ static const struct mtk_wdt_data mt8183_data = {
.toprgu_sw_rst_num = MT8183_TOPRGU_SW_RST_NUM,
};
+static const struct mtk_wdt_data mt8192_data = {
+ .toprgu_sw_rst_num = MT8192_TOPRGU_SW_RST_NUM,
+};
+
static int toprgu_reset_update(struct reset_controller_dev *rcdev,
unsigned long id, bool assert)
{
@@ -195,6 +200,19 @@ static int mtk_wdt_set_timeout(struct watchdog_device *wdt_dev,
return 0;
}
+static void mtk_wdt_init(struct watchdog_device *wdt_dev)
+{
+ struct mtk_wdt_dev *mtk_wdt = watchdog_get_drvdata(wdt_dev);
+ void __iomem *wdt_base;
+
+ wdt_base = mtk_wdt->wdt_base;
+
+ if (readl(wdt_base + WDT_MODE) & WDT_MODE_EN) {
+ set_bit(WDOG_HW_RUNNING, &wdt_dev->status);
+ mtk_wdt_set_timeout(wdt_dev, wdt_dev->timeout);
+ }
+}
+
static int mtk_wdt_stop(struct watchdog_device *wdt_dev)
{
struct mtk_wdt_dev *mtk_wdt = watchdog_get_drvdata(wdt_dev);
@@ -264,7 +282,7 @@ static int mtk_wdt_probe(struct platform_device *pdev)
mtk_wdt->wdt_dev.info = &mtk_wdt_info;
mtk_wdt->wdt_dev.ops = &mtk_wdt_ops;
mtk_wdt->wdt_dev.timeout = WDT_MAX_TIMEOUT;
- mtk_wdt->wdt_dev.max_timeout = WDT_MAX_TIMEOUT;
+ mtk_wdt->wdt_dev.max_hw_heartbeat_ms = WDT_MAX_TIMEOUT * 1000;
mtk_wdt->wdt_dev.min_timeout = WDT_MIN_TIMEOUT;
mtk_wdt->wdt_dev.parent = dev;
@@ -274,7 +292,7 @@ static int mtk_wdt_probe(struct platform_device *pdev)
watchdog_set_drvdata(&mtk_wdt->wdt_dev, mtk_wdt);
- mtk_wdt_stop(&mtk_wdt->wdt_dev);
+ mtk_wdt_init(&mtk_wdt->wdt_dev);
watchdog_stop_on_reboot(&mtk_wdt->wdt_dev);
err = devm_watchdog_register_device(dev, &mtk_wdt->wdt_dev);
@@ -322,6 +340,7 @@ static const struct of_device_id mtk_wdt_dt_ids[] = {
{ .compatible = "mediatek,mt2712-wdt", .data = &mt2712_data },
{ .compatible = "mediatek,mt6589-wdt" },
{ .compatible = "mediatek,mt8183-wdt", .data = &mt8183_data },
+ { .compatible = "mediatek,mt8192-wdt", .data = &mt8192_data },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, mtk_wdt_dt_ids);
diff --git a/drivers/watchdog/pcwd.c b/drivers/watchdog/pcwd.c
index e86fa7f8351d..a793b03a785d 100644
--- a/drivers/watchdog/pcwd.c
+++ b/drivers/watchdog/pcwd.c
@@ -951,14 +951,11 @@ error_request_region:
return ret;
}
-static int pcwd_isa_remove(struct device *dev, unsigned int id)
+static void pcwd_isa_remove(struct device *dev, unsigned int id)
{
if (debug >= DEBUG)
pr_debug("pcwd_isa_remove id=%d\n", id);
- if (!pcwd_private.io_addr)
- return 1;
-
/* Disable the board */
if (!nowayout)
pcwd_stop();
@@ -971,8 +968,6 @@ static int pcwd_isa_remove(struct device *dev, unsigned int id)
(pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4);
pcwd_private.io_addr = 0x0000;
cards_found--;
-
- return 0;
}
static void pcwd_isa_shutdown(struct device *dev, unsigned int id)
diff --git a/drivers/watchdog/qcom-wdt.c b/drivers/watchdog/qcom-wdt.c
index 7cf0f2ec649b..e38a87ffe5f5 100644
--- a/drivers/watchdog/qcom-wdt.c
+++ b/drivers/watchdog/qcom-wdt.c
@@ -22,7 +22,6 @@ enum wdt_reg {
};
#define QCOM_WDT_ENABLE BIT(0)
-#define QCOM_WDT_ENABLE_IRQ BIT(1)
static const u32 reg_offset_data_apcs_tmr[] = {
[WDT_RST] = 0x38,
@@ -63,16 +62,6 @@ struct qcom_wdt *to_qcom_wdt(struct watchdog_device *wdd)
return container_of(wdd, struct qcom_wdt, wdd);
}
-static inline int qcom_get_enable(struct watchdog_device *wdd)
-{
- int enable = QCOM_WDT_ENABLE;
-
- if (wdd->pretimeout)
- enable |= QCOM_WDT_ENABLE_IRQ;
-
- return enable;
-}
-
static irqreturn_t qcom_wdt_isr(int irq, void *arg)
{
struct watchdog_device *wdd = arg;
@@ -91,7 +80,7 @@ static int qcom_wdt_start(struct watchdog_device *wdd)
writel(1, wdt_addr(wdt, WDT_RST));
writel(bark * wdt->rate, wdt_addr(wdt, WDT_BARK_TIME));
writel(wdd->timeout * wdt->rate, wdt_addr(wdt, WDT_BITE_TIME));
- writel(qcom_get_enable(wdd), wdt_addr(wdt, WDT_EN));
+ writel(QCOM_WDT_ENABLE, wdt_addr(wdt, WDT_EN));
return 0;
}
diff --git a/drivers/watchdog/renesas_wdt.c b/drivers/watchdog/renesas_wdt.c
index 47fce4de0110..5791198960e6 100644
--- a/drivers/watchdog/renesas_wdt.c
+++ b/drivers/watchdog/renesas_wdt.c
@@ -9,6 +9,7 @@
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/io.h>
+#include <linux/iopoll.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
@@ -50,6 +51,7 @@ struct rwdt_priv {
struct watchdog_device wdev;
unsigned long clk_rate;
u8 cks;
+ struct clk *clk;
};
static void rwdt_write(struct rwdt_priv *priv, u32 val, unsigned int reg)
@@ -125,13 +127,33 @@ static unsigned int rwdt_get_timeleft(struct watchdog_device *wdev)
return DIV_BY_CLKS_PER_SEC(priv, 65536 - val);
}
+/* needs to be atomic - no RPM, no usleep_range, no scheduling! */
static int rwdt_restart(struct watchdog_device *wdev, unsigned long action,
void *data)
{
struct rwdt_priv *priv = watchdog_get_drvdata(wdev);
+ u8 val;
+
+ clk_prepare_enable(priv->clk);
+
+ /* Stop the timer before we modify any register */
+ val = readb_relaxed(priv->base + RWTCSRA) & ~RWTCSRA_TME;
+ rwdt_write(priv, val, RWTCSRA);
+ /* Delay 2 cycles before setting watchdog counter */
+ udelay(DIV_ROUND_UP(2 * 1000000, priv->clk_rate));
- rwdt_start(wdev);
rwdt_write(priv, 0xffff, RWTCNT);
+ /* smallest divider to reboot soon */
+ rwdt_write(priv, 0, RWTCSRA);
+
+ readb_poll_timeout_atomic(priv->base + RWTCSRA, val,
+ !(val & RWTCSRA_WRFLG), 1, 100);
+
+ rwdt_write(priv, RWTCSRA_TME, RWTCSRA);
+
+ /* wait 2 cycles, so watchdog will trigger */
+ udelay(DIV_ROUND_UP(2 * 1000000, priv->clk_rate));
+
return 0;
}
@@ -191,7 +213,6 @@ static int rwdt_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct rwdt_priv *priv;
- struct clk *clk;
unsigned long clks_per_sec;
int ret, i;
u8 csra;
@@ -207,13 +228,13 @@ static int rwdt_probe(struct platform_device *pdev)
if (IS_ERR(priv->base))
return PTR_ERR(priv->base);
- clk = devm_clk_get(dev, NULL);
- if (IS_ERR(clk))
- return PTR_ERR(clk);
+ priv->clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(priv->clk))
+ return PTR_ERR(priv->clk);
pm_runtime_enable(dev);
pm_runtime_get_sync(dev);
- priv->clk_rate = clk_get_rate(clk);
+ priv->clk_rate = clk_get_rate(priv->clk);
csra = readb_relaxed(priv->base + RWTCSRA);
priv->wdev.bootstatus = csra & RWTCSRA_WOVF ? WDIOF_CARDRESET : 0;
pm_runtime_put(dev);
diff --git a/drivers/watchdog/sirfsoc_wdt.c b/drivers/watchdog/sirfsoc_wdt.c
deleted file mode 100644
index 734cf2966ecb..000000000000
--- a/drivers/watchdog/sirfsoc_wdt.c
+++ /dev/null
@@ -1,216 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Watchdog driver for CSR SiRFprimaII and SiRFatlasVI
- *
- * Copyright (c) 2013 Cambridge Silicon Radio Limited, a CSR plc group company.
- */
-
-#include <linux/module.h>
-#include <linux/watchdog.h>
-#include <linux/platform_device.h>
-#include <linux/moduleparam.h>
-#include <linux/of.h>
-#include <linux/io.h>
-#include <linux/uaccess.h>
-
-#define CLOCK_FREQ 1000000
-
-#define SIRFSOC_TIMER_COUNTER_LO 0x0000
-#define SIRFSOC_TIMER_MATCH_0 0x0008
-#define SIRFSOC_TIMER_INT_EN 0x0024
-#define SIRFSOC_TIMER_WATCHDOG_EN 0x0028
-#define SIRFSOC_TIMER_LATCH 0x0030
-#define SIRFSOC_TIMER_LATCHED_LO 0x0034
-
-#define SIRFSOC_TIMER_WDT_INDEX 5
-
-#define SIRFSOC_WDT_MIN_TIMEOUT 30 /* 30 secs */
-#define SIRFSOC_WDT_MAX_TIMEOUT (10 * 60) /* 10 mins */
-#define SIRFSOC_WDT_DEFAULT_TIMEOUT 30 /* 30 secs */
-
-static unsigned int timeout;
-static bool nowayout = WATCHDOG_NOWAYOUT;
-
-module_param(timeout, uint, 0);
-module_param(nowayout, bool, 0);
-
-MODULE_PARM_DESC(timeout, "Default watchdog timeout (in seconds)");
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
- __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-static void __iomem *sirfsoc_wdt_base(struct watchdog_device *wdd)
-{
- return (void __iomem __force *)watchdog_get_drvdata(wdd);
-}
-
-static unsigned int sirfsoc_wdt_gettimeleft(struct watchdog_device *wdd)
-{
- u32 counter, match;
- void __iomem *wdt_base;
- int time_left;
-
- wdt_base = sirfsoc_wdt_base(wdd);
- counter = readl(wdt_base + SIRFSOC_TIMER_COUNTER_LO);
- match = readl(wdt_base +
- SIRFSOC_TIMER_MATCH_0 + (SIRFSOC_TIMER_WDT_INDEX << 2));
-
- time_left = match - counter;
-
- return time_left / CLOCK_FREQ;
-}
-
-static int sirfsoc_wdt_updatetimeout(struct watchdog_device *wdd)
-{
- u32 counter, timeout_ticks;
- void __iomem *wdt_base;
-
- timeout_ticks = wdd->timeout * CLOCK_FREQ;
- wdt_base = sirfsoc_wdt_base(wdd);
-
- /* Enable the latch before reading the LATCH_LO register */
- writel(1, wdt_base + SIRFSOC_TIMER_LATCH);
-
- /* Set the TO value */
- counter = readl(wdt_base + SIRFSOC_TIMER_LATCHED_LO);
-
- counter += timeout_ticks;
-
- writel(counter, wdt_base +
- SIRFSOC_TIMER_MATCH_0 + (SIRFSOC_TIMER_WDT_INDEX << 2));
-
- return 0;
-}
-
-static int sirfsoc_wdt_enable(struct watchdog_device *wdd)
-{
- void __iomem *wdt_base = sirfsoc_wdt_base(wdd);
- sirfsoc_wdt_updatetimeout(wdd);
-
- /*
- * NOTE: If interrupt is not enabled
- * then WD-Reset doesn't get generated at all.
- */
- writel(readl(wdt_base + SIRFSOC_TIMER_INT_EN)
- | (1 << SIRFSOC_TIMER_WDT_INDEX),
- wdt_base + SIRFSOC_TIMER_INT_EN);
- writel(1, wdt_base + SIRFSOC_TIMER_WATCHDOG_EN);
-
- return 0;
-}
-
-static int sirfsoc_wdt_disable(struct watchdog_device *wdd)
-{
- void __iomem *wdt_base = sirfsoc_wdt_base(wdd);
-
- writel(0, wdt_base + SIRFSOC_TIMER_WATCHDOG_EN);
- writel(readl(wdt_base + SIRFSOC_TIMER_INT_EN)
- & (~(1 << SIRFSOC_TIMER_WDT_INDEX)),
- wdt_base + SIRFSOC_TIMER_INT_EN);
-
- return 0;
-}
-
-static int sirfsoc_wdt_settimeout(struct watchdog_device *wdd, unsigned int to)
-{
- wdd->timeout = to;
- sirfsoc_wdt_updatetimeout(wdd);
-
- return 0;
-}
-
-#define OPTIONS (WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE)
-
-static const struct watchdog_info sirfsoc_wdt_ident = {
- .options = OPTIONS,
- .firmware_version = 0,
- .identity = "SiRFSOC Watchdog",
-};
-
-static const struct watchdog_ops sirfsoc_wdt_ops = {
- .owner = THIS_MODULE,
- .start = sirfsoc_wdt_enable,
- .stop = sirfsoc_wdt_disable,
- .get_timeleft = sirfsoc_wdt_gettimeleft,
- .ping = sirfsoc_wdt_updatetimeout,
- .set_timeout = sirfsoc_wdt_settimeout,
-};
-
-static struct watchdog_device sirfsoc_wdd = {
- .info = &sirfsoc_wdt_ident,
- .ops = &sirfsoc_wdt_ops,
- .timeout = SIRFSOC_WDT_DEFAULT_TIMEOUT,
- .min_timeout = SIRFSOC_WDT_MIN_TIMEOUT,
- .max_timeout = SIRFSOC_WDT_MAX_TIMEOUT,
-};
-
-static int sirfsoc_wdt_probe(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- int ret;
- void __iomem *base;
-
- base = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(base))
- return PTR_ERR(base);
-
- watchdog_set_drvdata(&sirfsoc_wdd, (__force void *)base);
-
- watchdog_init_timeout(&sirfsoc_wdd, timeout, dev);
- watchdog_set_nowayout(&sirfsoc_wdd, nowayout);
- sirfsoc_wdd.parent = dev;
-
- watchdog_stop_on_reboot(&sirfsoc_wdd);
- watchdog_stop_on_unregister(&sirfsoc_wdd);
- ret = devm_watchdog_register_device(dev, &sirfsoc_wdd);
- if (ret)
- return ret;
-
- platform_set_drvdata(pdev, &sirfsoc_wdd);
-
- return 0;
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int sirfsoc_wdt_suspend(struct device *dev)
-{
- return 0;
-}
-
-static int sirfsoc_wdt_resume(struct device *dev)
-{
- struct watchdog_device *wdd = dev_get_drvdata(dev);
-
- /*
- * NOTE: Since timer controller registers settings are saved
- * and restored back by the timer-prima2.c, so we need not
- * update WD settings except refreshing timeout.
- */
- sirfsoc_wdt_updatetimeout(wdd);
-
- return 0;
-}
-#endif
-
-static SIMPLE_DEV_PM_OPS(sirfsoc_wdt_pm_ops,
- sirfsoc_wdt_suspend, sirfsoc_wdt_resume);
-
-static const struct of_device_id sirfsoc_wdt_of_match[] = {
- { .compatible = "sirf,prima2-tick"},
- {},
-};
-MODULE_DEVICE_TABLE(of, sirfsoc_wdt_of_match);
-
-static struct platform_driver sirfsoc_wdt_driver = {
- .driver = {
- .name = "sirfsoc-wdt",
- .pm = &sirfsoc_wdt_pm_ops,
- .of_match_table = sirfsoc_wdt_of_match,
- },
- .probe = sirfsoc_wdt_probe,
-};
-module_platform_driver(sirfsoc_wdt_driver);
-
-MODULE_DESCRIPTION("SiRF SoC watchdog driver");
-MODULE_AUTHOR("Xianglong Du <Xianglong.Du@csr.com>");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:sirfsoc-wdt");
diff --git a/drivers/watchdog/tangox_wdt.c b/drivers/watchdog/tangox_wdt.c
deleted file mode 100644
index 1afb0e9d808c..000000000000
--- a/drivers/watchdog/tangox_wdt.c
+++ /dev/null
@@ -1,209 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Copyright (C) 2015 Mans Rullgard <mans@mansr.com>
- * SMP86xx/SMP87xx Watchdog driver
- */
-
-#include <linux/bitops.h>
-#include <linux/clk.h>
-#include <linux/delay.h>
-#include <linux/io.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/mod_devicetable.h>
-#include <linux/platform_device.h>
-#include <linux/watchdog.h>
-
-#define DEFAULT_TIMEOUT 30
-
-static bool nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, bool, 0);
-MODULE_PARM_DESC(nowayout,
- "Watchdog cannot be stopped once started (default="
- __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-static unsigned int timeout;
-module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout");
-
-/*
- * Counter counts down from programmed value. Reset asserts when
- * the counter reaches 1.
- */
-#define WD_COUNTER 0
-
-#define WD_CONFIG 4
-#define WD_CONFIG_XTAL_IN BIT(0)
-#define WD_CONFIG_DISABLE BIT(31)
-
-struct tangox_wdt_device {
- struct watchdog_device wdt;
- void __iomem *base;
- unsigned long clk_rate;
- struct clk *clk;
-};
-
-static int tangox_wdt_set_timeout(struct watchdog_device *wdt,
- unsigned int new_timeout)
-{
- wdt->timeout = new_timeout;
-
- return 0;
-}
-
-static int tangox_wdt_start(struct watchdog_device *wdt)
-{
- struct tangox_wdt_device *dev = watchdog_get_drvdata(wdt);
- u32 ticks;
-
- ticks = 1 + wdt->timeout * dev->clk_rate;
- writel(ticks, dev->base + WD_COUNTER);
-
- return 0;
-}
-
-static int tangox_wdt_stop(struct watchdog_device *wdt)
-{
- struct tangox_wdt_device *dev = watchdog_get_drvdata(wdt);
-
- writel(0, dev->base + WD_COUNTER);
-
- return 0;
-}
-
-static unsigned int tangox_wdt_get_timeleft(struct watchdog_device *wdt)
-{
- struct tangox_wdt_device *dev = watchdog_get_drvdata(wdt);
- u32 count;
-
- count = readl(dev->base + WD_COUNTER);
-
- if (!count)
- return 0;
-
- return (count - 1) / dev->clk_rate;
-}
-
-static const struct watchdog_info tangox_wdt_info = {
- .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
- .identity = "tangox watchdog",
-};
-
-static int tangox_wdt_restart(struct watchdog_device *wdt,
- unsigned long action, void *data)
-{
- struct tangox_wdt_device *dev = watchdog_get_drvdata(wdt);
-
- writel(1, dev->base + WD_COUNTER);
-
- return 0;
-}
-
-static const struct watchdog_ops tangox_wdt_ops = {
- .start = tangox_wdt_start,
- .stop = tangox_wdt_stop,
- .set_timeout = tangox_wdt_set_timeout,
- .get_timeleft = tangox_wdt_get_timeleft,
- .restart = tangox_wdt_restart,
-};
-
-static void tangox_clk_disable_unprepare(void *data)
-{
- clk_disable_unprepare(data);
-}
-
-static int tangox_wdt_probe(struct platform_device *pdev)
-{
- struct tangox_wdt_device *dev;
- u32 config;
- int err;
-
- dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
- if (!dev)
- return -ENOMEM;
-
- dev->base = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(dev->base))
- return PTR_ERR(dev->base);
-
- dev->clk = devm_clk_get(&pdev->dev, NULL);
- if (IS_ERR(dev->clk))
- return PTR_ERR(dev->clk);
-
- err = clk_prepare_enable(dev->clk);
- if (err)
- return err;
- err = devm_add_action_or_reset(&pdev->dev,
- tangox_clk_disable_unprepare, dev->clk);
- if (err)
- return err;
-
- dev->clk_rate = clk_get_rate(dev->clk);
- if (!dev->clk_rate)
- return -EINVAL;
-
- dev->wdt.parent = &pdev->dev;
- dev->wdt.info = &tangox_wdt_info;
- dev->wdt.ops = &tangox_wdt_ops;
- dev->wdt.timeout = DEFAULT_TIMEOUT;
- dev->wdt.min_timeout = 1;
- dev->wdt.max_hw_heartbeat_ms = (U32_MAX - 1) / dev->clk_rate;
-
- watchdog_init_timeout(&dev->wdt, timeout, &pdev->dev);
- watchdog_set_nowayout(&dev->wdt, nowayout);
- watchdog_set_drvdata(&dev->wdt, dev);
-
- /*
- * Deactivate counter if disable bit is set to avoid
- * accidental reset.
- */
- config = readl(dev->base + WD_CONFIG);
- if (config & WD_CONFIG_DISABLE)
- writel(0, dev->base + WD_COUNTER);
-
- writel(WD_CONFIG_XTAL_IN, dev->base + WD_CONFIG);
-
- /*
- * Mark as active and restart with configured timeout if
- * already running.
- */
- if (readl(dev->base + WD_COUNTER)) {
- set_bit(WDOG_HW_RUNNING, &dev->wdt.status);
- tangox_wdt_start(&dev->wdt);
- }
-
- watchdog_set_restart_priority(&dev->wdt, 128);
-
- watchdog_stop_on_unregister(&dev->wdt);
- err = devm_watchdog_register_device(&pdev->dev, &dev->wdt);
- if (err)
- return err;
-
- platform_set_drvdata(pdev, dev);
-
- dev_info(&pdev->dev, "SMP86xx/SMP87xx watchdog registered\n");
-
- return 0;
-}
-
-static const struct of_device_id tangox_wdt_dt_ids[] = {
- { .compatible = "sigma,smp8642-wdt" },
- { .compatible = "sigma,smp8759-wdt" },
- { }
-};
-MODULE_DEVICE_TABLE(of, tangox_wdt_dt_ids);
-
-static struct platform_driver tangox_wdt_driver = {
- .probe = tangox_wdt_probe,
- .driver = {
- .name = "tangox-wdt",
- .of_match_table = tangox_wdt_dt_ids,
- },
-};
-
-module_platform_driver(tangox_wdt_driver);
-
-MODULE_AUTHOR("Mans Rullgard <mans@mansr.com>");
-MODULE_DESCRIPTION("SMP86xx/SMP87xx Watchdog driver");
-MODULE_LICENSE("GPL");
diff --git a/drivers/watchdog/watchdog_core.c b/drivers/watchdog/watchdog_core.c
index 0e9a99559609..5df0a22e2cb4 100644
--- a/drivers/watchdog/watchdog_core.c
+++ b/drivers/watchdog/watchdog_core.c
@@ -158,7 +158,7 @@ static int watchdog_reboot_notifier(struct notifier_block *nb,
wdd = container_of(nb, struct watchdog_device, reboot_nb);
if (code == SYS_DOWN || code == SYS_HALT) {
- if (watchdog_active(wdd)) {
+ if (watchdog_active(wdd) || watchdog_hw_running(wdd)) {
int ret;
ret = wdd->ops->stop(wdd);
diff --git a/drivers/watchdog/ziirave_wdt.c b/drivers/watchdog/ziirave_wdt.c
index cab86a08456b..4297280807ca 100644
--- a/drivers/watchdog/ziirave_wdt.c
+++ b/drivers/watchdog/ziirave_wdt.c
@@ -18,7 +18,6 @@
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <linux/types.h>
-#include <linux/version.h>
#include <linux/watchdog.h>
#include <asm/unaligned.h>
diff --git a/drivers/watchdog/zx2967_wdt.c b/drivers/watchdog/zx2967_wdt.c
deleted file mode 100644
index bf183e73671a..000000000000
--- a/drivers/watchdog/zx2967_wdt.c
+++ /dev/null
@@ -1,279 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * watchdog driver for ZTE's zx2967 family
- *
- * Copyright (C) 2017 ZTE Ltd.
- *
- * Author: Baoyou Xie <baoyou.xie@linaro.org>
- */
-
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/mfd/syscon.h>
-#include <linux/module.h>
-#include <linux/of_address.h>
-#include <linux/platform_device.h>
-#include <linux/regmap.h>
-#include <linux/reset.h>
-#include <linux/watchdog.h>
-
-#define ZX2967_WDT_CFG_REG 0x4
-#define ZX2967_WDT_LOAD_REG 0x8
-#define ZX2967_WDT_REFRESH_REG 0x18
-#define ZX2967_WDT_START_REG 0x1c
-
-#define ZX2967_WDT_REFRESH_MASK GENMASK(5, 0)
-
-#define ZX2967_WDT_CFG_DIV(n) ((((n) & 0xff) - 1) << 8)
-#define ZX2967_WDT_START_EN 0x1
-
-/*
- * Hardware magic number.
- * When watchdog reg is written, the lowest 16 bits are valid, but
- * the highest 16 bits should be always this number.
- */
-#define ZX2967_WDT_WRITEKEY (0x1234 << 16)
-#define ZX2967_WDT_VAL_MASK GENMASK(15, 0)
-
-#define ZX2967_WDT_DIV_DEFAULT 16
-#define ZX2967_WDT_DEFAULT_TIMEOUT 32
-#define ZX2967_WDT_MIN_TIMEOUT 1
-#define ZX2967_WDT_MAX_TIMEOUT 524
-#define ZX2967_WDT_MAX_COUNT 0xffff
-
-#define ZX2967_WDT_CLK_FREQ 0x8000
-
-#define ZX2967_WDT_FLAG_REBOOT_MON BIT(0)
-
-struct zx2967_wdt {
- struct watchdog_device wdt_device;
- void __iomem *reg_base;
- struct clk *clock;
-};
-
-static inline u32 zx2967_wdt_readl(struct zx2967_wdt *wdt, u16 reg)
-{
- return readl_relaxed(wdt->reg_base + reg);
-}
-
-static inline void zx2967_wdt_writel(struct zx2967_wdt *wdt, u16 reg, u32 val)
-{
- writel_relaxed(val | ZX2967_WDT_WRITEKEY, wdt->reg_base + reg);
-}
-
-static void zx2967_wdt_refresh(struct zx2967_wdt *wdt)
-{
- u32 val;
-
- val = zx2967_wdt_readl(wdt, ZX2967_WDT_REFRESH_REG);
- /*
- * Bit 4-5, 1 and 2: refresh config info
- * Bit 2-3, 1 and 2: refresh counter
- * Bit 0-1, 1 and 2: refresh int-value
- * we shift each group value between 1 and 2 to refresh all data.
- */
- val ^= ZX2967_WDT_REFRESH_MASK;
- zx2967_wdt_writel(wdt, ZX2967_WDT_REFRESH_REG,
- val & ZX2967_WDT_VAL_MASK);
-}
-
-static int
-zx2967_wdt_set_timeout(struct watchdog_device *wdd, unsigned int timeout)
-{
- struct zx2967_wdt *wdt = watchdog_get_drvdata(wdd);
- unsigned int divisor = ZX2967_WDT_DIV_DEFAULT;
- u32 count;
-
- count = timeout * ZX2967_WDT_CLK_FREQ;
- if (count > divisor * ZX2967_WDT_MAX_COUNT)
- divisor = DIV_ROUND_UP(count, ZX2967_WDT_MAX_COUNT);
- count = DIV_ROUND_UP(count, divisor);
- zx2967_wdt_writel(wdt, ZX2967_WDT_CFG_REG,
- ZX2967_WDT_CFG_DIV(divisor) & ZX2967_WDT_VAL_MASK);
- zx2967_wdt_writel(wdt, ZX2967_WDT_LOAD_REG,
- count & ZX2967_WDT_VAL_MASK);
- zx2967_wdt_refresh(wdt);
- wdd->timeout = (count * divisor) / ZX2967_WDT_CLK_FREQ;
-
- return 0;
-}
-
-static void __zx2967_wdt_start(struct zx2967_wdt *wdt)
-{
- u32 val;
-
- val = zx2967_wdt_readl(wdt, ZX2967_WDT_START_REG);
- val |= ZX2967_WDT_START_EN;
- zx2967_wdt_writel(wdt, ZX2967_WDT_START_REG,
- val & ZX2967_WDT_VAL_MASK);
-}
-
-static void __zx2967_wdt_stop(struct zx2967_wdt *wdt)
-{
- u32 val;
-
- val = zx2967_wdt_readl(wdt, ZX2967_WDT_START_REG);
- val &= ~ZX2967_WDT_START_EN;
- zx2967_wdt_writel(wdt, ZX2967_WDT_START_REG,
- val & ZX2967_WDT_VAL_MASK);
-}
-
-static int zx2967_wdt_start(struct watchdog_device *wdd)
-{
- struct zx2967_wdt *wdt = watchdog_get_drvdata(wdd);
-
- zx2967_wdt_set_timeout(wdd, wdd->timeout);
- __zx2967_wdt_start(wdt);
-
- return 0;
-}
-
-static int zx2967_wdt_stop(struct watchdog_device *wdd)
-{
- struct zx2967_wdt *wdt = watchdog_get_drvdata(wdd);
-
- __zx2967_wdt_stop(wdt);
-
- return 0;
-}
-
-static int zx2967_wdt_keepalive(struct watchdog_device *wdd)
-{
- struct zx2967_wdt *wdt = watchdog_get_drvdata(wdd);
-
- zx2967_wdt_refresh(wdt);
-
- return 0;
-}
-
-#define ZX2967_WDT_OPTIONS \
- (WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE)
-static const struct watchdog_info zx2967_wdt_ident = {
- .options = ZX2967_WDT_OPTIONS,
- .identity = "zx2967 watchdog",
-};
-
-static const struct watchdog_ops zx2967_wdt_ops = {
- .owner = THIS_MODULE,
- .start = zx2967_wdt_start,
- .stop = zx2967_wdt_stop,
- .ping = zx2967_wdt_keepalive,
- .set_timeout = zx2967_wdt_set_timeout,
-};
-
-static void zx2967_wdt_reset_sysctrl(struct device *dev)
-{
- int ret;
- void __iomem *regmap;
- unsigned int offset, mask, config;
- struct of_phandle_args out_args;
-
- ret = of_parse_phandle_with_fixed_args(dev->of_node,
- "zte,wdt-reset-sysctrl", 3, 0, &out_args);
- if (ret)
- return;
-
- offset = out_args.args[0];
- config = out_args.args[1];
- mask = out_args.args[2];
-
- regmap = syscon_node_to_regmap(out_args.np);
- if (IS_ERR(regmap)) {
- of_node_put(out_args.np);
- return;
- }
-
- regmap_update_bits(regmap, offset, mask, config);
- of_node_put(out_args.np);
-}
-
-static void zx2967_clk_disable_unprepare(void *data)
-{
- clk_disable_unprepare(data);
-}
-
-static int zx2967_wdt_probe(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- struct zx2967_wdt *wdt;
- int ret;
- struct reset_control *rstc;
-
- wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);
- if (!wdt)
- return -ENOMEM;
-
- platform_set_drvdata(pdev, wdt);
-
- wdt->wdt_device.info = &zx2967_wdt_ident;
- wdt->wdt_device.ops = &zx2967_wdt_ops;
- wdt->wdt_device.timeout = ZX2967_WDT_DEFAULT_TIMEOUT;
- wdt->wdt_device.max_timeout = ZX2967_WDT_MAX_TIMEOUT;
- wdt->wdt_device.min_timeout = ZX2967_WDT_MIN_TIMEOUT;
- wdt->wdt_device.parent = dev;
-
- wdt->reg_base = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(wdt->reg_base))
- return PTR_ERR(wdt->reg_base);
-
- zx2967_wdt_reset_sysctrl(dev);
-
- wdt->clock = devm_clk_get(dev, NULL);
- if (IS_ERR(wdt->clock)) {
- dev_err(dev, "failed to find watchdog clock source\n");
- return PTR_ERR(wdt->clock);
- }
-
- ret = clk_prepare_enable(wdt->clock);
- if (ret < 0) {
- dev_err(dev, "failed to enable clock\n");
- return ret;
- }
- ret = devm_add_action_or_reset(dev, zx2967_clk_disable_unprepare,
- wdt->clock);
- if (ret)
- return ret;
- clk_set_rate(wdt->clock, ZX2967_WDT_CLK_FREQ);
-
- rstc = devm_reset_control_get_exclusive(dev, NULL);
- if (IS_ERR(rstc)) {
- dev_err(dev, "failed to get rstc");
- return PTR_ERR(rstc);
- }
-
- reset_control_assert(rstc);
- reset_control_deassert(rstc);
-
- watchdog_set_drvdata(&wdt->wdt_device, wdt);
- watchdog_init_timeout(&wdt->wdt_device,
- ZX2967_WDT_DEFAULT_TIMEOUT, dev);
- watchdog_set_nowayout(&wdt->wdt_device, WATCHDOG_NOWAYOUT);
-
- ret = devm_watchdog_register_device(dev, &wdt->wdt_device);
- if (ret)
- return ret;
-
- dev_info(dev, "watchdog enabled (timeout=%d sec, nowayout=%d)",
- wdt->wdt_device.timeout, WATCHDOG_NOWAYOUT);
-
- return 0;
-}
-
-static const struct of_device_id zx2967_wdt_match[] = {
- { .compatible = "zte,zx296718-wdt", },
- {}
-};
-MODULE_DEVICE_TABLE(of, zx2967_wdt_match);
-
-static struct platform_driver zx2967_wdt_driver = {
- .probe = zx2967_wdt_probe,
- .driver = {
- .name = "zx2967-wdt",
- .of_match_table = of_match_ptr(zx2967_wdt_match),
- },
-};
-module_platform_driver(zx2967_wdt_driver);
-
-MODULE_AUTHOR("Baoyou Xie <baoyou.xie@linaro.org>");
-MODULE_DESCRIPTION("ZTE zx2967 Watchdog Device Driver");
-MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-01 02:53:13 +0300