diff options
Diffstat (limited to 'arch/arm/plat-samsung/watchdog-reset.c')
-rw-r--r-- | arch/arm/plat-samsung/watchdog-reset.c | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/arch/arm/plat-samsung/watchdog-reset.c b/arch/arm/plat-samsung/watchdog-reset.c deleted file mode 100644 index 71d85ff323f7..000000000000 --- a/arch/arm/plat-samsung/watchdog-reset.c +++ /dev/null @@ -1,93 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -// -// Copyright (c) 2008 Simtec Electronics -// Ben Dooks <ben@simtec.co.uk> -// -// Copyright (c) 2013 Tomasz Figa <tomasz.figa@gmail.com> -// -// Watchdog reset support for Samsung SoCs. - -#include <linux/clk.h> -#include <linux/err.h> -#include <linux/io.h> -#include <linux/delay.h> -#include <linux/of.h> -#include <linux/of_address.h> - -#define S3C2410_WTCON 0x00 -#define S3C2410_WTDAT 0x04 -#define S3C2410_WTCNT 0x08 - -#define S3C2410_WTCON_ENABLE (1 << 5) -#define S3C2410_WTCON_DIV16 (0 << 3) -#define S3C2410_WTCON_RSTEN (1 << 0) -#define S3C2410_WTCON_PRESCALE(x) ((x) << 8) - -static void __iomem *wdt_base; -static struct clk *wdt_clock; - -void samsung_wdt_reset(void) -{ - if (!wdt_base) { - pr_err("%s: wdt reset not initialized\n", __func__); - /* delay to allow the serial port to show the message */ - mdelay(50); - return; - } - - if (!IS_ERR(wdt_clock)) - clk_prepare_enable(wdt_clock); - - /* disable watchdog, to be safe */ - __raw_writel(0, wdt_base + S3C2410_WTCON); - - /* put initial values into count and data */ - __raw_writel(0x80, wdt_base + S3C2410_WTCNT); - __raw_writel(0x80, wdt_base + S3C2410_WTDAT); - - /* set the watchdog to go and reset... */ - __raw_writel(S3C2410_WTCON_ENABLE | S3C2410_WTCON_DIV16 | - S3C2410_WTCON_RSTEN | S3C2410_WTCON_PRESCALE(0x20), - wdt_base + S3C2410_WTCON); - - /* wait for reset to assert... */ - mdelay(500); - - pr_err("Watchdog reset failed to assert reset\n"); - - /* delay to allow the serial port to show the message */ - mdelay(50); -} - -#ifdef CONFIG_OF -static const struct of_device_id s3c2410_wdt_match[] = { - { .compatible = "samsung,s3c2410-wdt" }, - { .compatible = "samsung,s3c6410-wdt" }, - {}, -}; - -void __init samsung_wdt_reset_of_init(void) -{ - struct device_node *np; - - np = of_find_matching_node(NULL, s3c2410_wdt_match); - if (!np) { - pr_err("%s: failed to find watchdog node\n", __func__); - return; - } - - wdt_base = of_iomap(np, 0); - if (!wdt_base) { - pr_err("%s: failed to map watchdog registers\n", __func__); - return; - } - - wdt_clock = of_clk_get(np, 0); -} -#endif - -void __init samsung_wdt_reset_init(void __iomem *base) -{ - wdt_base = base; - wdt_clock = clk_get(NULL, "watchdog"); -} |