From 8f1ae77f466660b6da2455cccecc07ae631fa66d Mon Sep 17 00:00:00 2001 From: Maxime Ripard Date: Tue, 24 Sep 2013 11:07:43 +0300 Subject: reset: Add Allwinner SoCs Reset Controller Driver The Allwinner A31 and most of the other Allwinner SoCs have an IP maintaining a few other IPs in the SoC in reset by default. Among these IPs are the A31's High Speed Timers, hence why we can't use the regular driver construct in every cases, and need to call the registering function directly during machine initialisation. Apart from this, the implementation is fairly straightforward, and could easily be moved to a generic MMIO-based reset controller driver if the need ever arise. Signed-off-by: Maxime Ripard Acked-by: Philipp Zabel --- drivers/reset/Makefile | 1 + drivers/reset/reset-sunxi.c | 175 ++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 176 insertions(+) create mode 100644 drivers/reset/reset-sunxi.c (limited to 'drivers') diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile index 1e2d83f2b995..cc29832c9638 100644 --- a/drivers/reset/Makefile +++ b/drivers/reset/Makefile @@ -1 +1,2 @@ obj-$(CONFIG_RESET_CONTROLLER) += core.o +obj-$(CONFIG_ARCH_SUNXI) += reset-sunxi.o diff --git a/drivers/reset/reset-sunxi.c b/drivers/reset/reset-sunxi.c new file mode 100644 index 000000000000..695bd3496eba --- /dev/null +++ b/drivers/reset/reset-sunxi.c @@ -0,0 +1,175 @@ +/* + * Allwinner SoCs Reset Controller driver + * + * Copyright 2013 Maxime Ripard + * + * Maxime Ripard + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct sunxi_reset_data { + spinlock_t lock; + void __iomem *membase; + struct reset_controller_dev rcdev; +}; + +static int sunxi_reset_assert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct sunxi_reset_data *data = container_of(rcdev, + struct sunxi_reset_data, + rcdev); + int bank = id / BITS_PER_LONG; + int offset = id % BITS_PER_LONG; + unsigned long flags; + u32 reg; + + spin_lock_irqsave(&data->lock, flags); + + reg = readl(data->membase + (bank * 4)); + writel(reg & ~BIT(offset), data->membase + (bank * 4)); + + spin_unlock_irqrestore(&data->lock, flags); + + return 0; +} + +static int sunxi_reset_deassert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct sunxi_reset_data *data = container_of(rcdev, + struct sunxi_reset_data, + rcdev); + int bank = id / BITS_PER_LONG; + int offset = id % BITS_PER_LONG; + unsigned long flags; + u32 reg; + + spin_lock_irqsave(&data->lock, flags); + + reg = readl(data->membase + (bank * 4)); + writel(reg | BIT(offset), data->membase + (bank * 4)); + + spin_unlock_irqrestore(&data->lock, flags); + + return 0; +} + +static struct reset_control_ops sunxi_reset_ops = { + .assert = sunxi_reset_assert, + .deassert = sunxi_reset_deassert, +}; + +static int sunxi_reset_init(struct device_node *np) +{ + struct sunxi_reset_data *data; + struct resource res; + resource_size_t size; + int ret; + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + ret = of_address_to_resource(np, 0, &res); + if (ret) + goto err_alloc; + + size = resource_size(&res); + if (!request_mem_region(res.start, size, np->name)) { + ret = -EBUSY; + goto err_alloc; + } + + data->membase = ioremap(res.start, size); + if (!data->membase) { + ret = -ENOMEM; + goto err_alloc; + } + + data->rcdev.owner = THIS_MODULE; + data->rcdev.nr_resets = size * 32; + data->rcdev.ops = &sunxi_reset_ops; + data->rcdev.of_node = np; + reset_controller_register(&data->rcdev); + + return 0; + +err_alloc: + kfree(data); + return ret; +}; + +/* + * These are the reset controller we need to initialize early on in + * our system, before we can even think of using a regular device + * driver for it. + */ +static const struct of_device_id sunxi_early_reset_dt_ids[] __initdata = { + { .compatible = "allwinner,sun6i-a31-ahb1-reset", }, + { /* sentinel */ }, +}; + +void __init sun6i_reset_init(void) +{ + struct device_node *np; + + for_each_matching_node(np, sunxi_early_reset_dt_ids) + sunxi_reset_init(np); +} + +/* + * And these are the controllers we can register through the regular + * device model. + */ +static const struct of_device_id sunxi_reset_dt_ids[] = { + { .compatible = "allwinner,sun6i-a31-clock-reset", }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, sunxi_reset_dt_ids); + +static int sunxi_reset_probe(struct platform_device *pdev) +{ + return sunxi_reset_init(pdev->dev.of_node); +} + +static int sunxi_reset_remove(struct platform_device *pdev) +{ + struct sunxi_reset_data *data = platform_get_drvdata(pdev); + + reset_controller_unregister(&data->rcdev); + iounmap(data->membase); + kfree(data); + + return 0; +} + +static struct platform_driver sunxi_reset_driver = { + .probe = sunxi_reset_probe, + .remove = sunxi_reset_remove, + .driver = { + .name = "sunxi-reset", + .owner = THIS_MODULE, + .of_match_table = sunxi_reset_dt_ids, + }, +}; +module_platform_driver(sunxi_reset_driver); + +MODULE_AUTHOR("Maxime Ripard Date: Sat, 9 Nov 2013 13:33:48 +0100 Subject: ARM: Rename ARCH_SHMOBILE to ARCH_SHMOBILE_LEGACY SH-Mobile platforms are transitioning from non-multiplatform to multiplatform kernel. A new ARCH_SHMOBILE_MULTI configuration symbol has been created to group all multiplatform-enabled SH-Mobile SoCs. The existing ARCH_SHMOBILE configuration symbol groups SoCs that haven't been converted yet. This arrangement works fine for the arch/ code, but lots of drivers needed on both ARCH_SHMOBILE and ARCH_SHMOBILE_MULTI depend on ARCH_SHMOBILE only. In order to avoid changing them, rename ARCH_SHMOBILE to ARCH_SHMOBILE_LEGACY, and create a new boolean ARCH_SHMOBILE configuration symbol that is selected by both ARCH_SHMOBILE_LEGACY and ARCH_SHMOBILE_MULTI. Signed-off-by: Laurent Pinchart Acked-by: Magnus Damm Signed-off-by: Simon Horman --- arch/arm/Kconfig | 14 ++++++++------ arch/arm/Makefile | 1 - arch/arm/boot/compressed/Makefile | 2 +- arch/arm/boot/dts/Makefile | 2 +- arch/arm/configs/ape6evm_defconfig | 2 +- arch/arm/configs/armadillo800eva_defconfig | 2 +- arch/arm/configs/bockw_defconfig | 2 +- arch/arm/configs/koelsch_defconfig | 2 +- arch/arm/configs/kzm9d_defconfig | 2 +- arch/arm/configs/kzm9g_defconfig | 2 +- arch/arm/configs/lager_defconfig | 2 +- arch/arm/configs/mackerel_defconfig | 2 +- arch/arm/configs/marzen_defconfig | 2 +- arch/arm/mach-shmobile/Kconfig | 8 ++++++-- drivers/Makefile | 2 +- 15 files changed, 26 insertions(+), 21 deletions(-) (limited to 'drivers') diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index c1f1a7eee953..483d316543ad 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -644,8 +644,9 @@ config ARCH_MSM stack and controls some vital subsystems (clock and power control, etc). -config ARCH_SHMOBILE - bool "Renesas SH-Mobile / R-Mobile" +config ARCH_SHMOBILE_LEGACY + bool "Renesas SH-Mobile / R-Mobile (non-multiplatform)" + select ARCH_SHMOBILE select ARM_PATCH_PHYS_VIRT select CLKDEV_LOOKUP select GENERIC_CLOCKEVENTS @@ -660,7 +661,8 @@ config ARCH_SHMOBILE select PM_GENERIC_DOMAINS if PM select SPARSE_IRQ help - Support for Renesas's SH-Mobile and R-Mobile ARM platforms. + Support for Renesas's SH-Mobile and R-Mobile ARM platforms using + a non-multiplatform kernel. config ARCH_RPC bool "RiscPC" @@ -1611,7 +1613,7 @@ config HZ_FIXED default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \ ARCH_S5PV210 || ARCH_EXYNOS4 default AT91_TIMER_HZ if ARCH_AT91 - default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE + default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE_LEGACY default 0 choice @@ -1796,8 +1798,8 @@ config ARCH_WANT_GENERAL_HUGETLB source "mm/Kconfig" config FORCE_MAX_ZONEORDER - int "Maximum zone order" if ARCH_SHMOBILE - range 11 64 if ARCH_SHMOBILE + int "Maximum zone order" if ARCH_SHMOBILE_LEGACY + range 11 64 if ARCH_SHMOBILE_LEGACY default "12" if SOC_AM33XX default "9" if SA1111 default "11" diff --git a/arch/arm/Makefile b/arch/arm/Makefile index c99b1086d83d..1edf8ebd8494 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -190,7 +190,6 @@ machine-$(CONFIG_ARCH_S5PC100) += s5pc100 machine-$(CONFIG_ARCH_S5PV210) += s5pv210 machine-$(CONFIG_ARCH_SA1100) += sa1100 machine-$(CONFIG_ARCH_SHMOBILE) += shmobile -machine-$(CONFIG_ARCH_SHMOBILE_MULTI) += shmobile machine-$(CONFIG_ARCH_SIRF) += prima2 machine-$(CONFIG_ARCH_SOCFPGA) += socfpga machine-$(CONFIG_ARCH_STI) += sti diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile index e7190bb5998e..f54d5a25c7ee 100644 --- a/arch/arm/boot/compressed/Makefile +++ b/arch/arm/boot/compressed/Makefile @@ -64,7 +64,7 @@ else endif endif -ifeq ($(CONFIG_ARCH_SHMOBILE),y) +ifeq ($(CONFIG_ARCH_SHMOBILE_LEGACY),y) OBJS += head-shmobile.o endif diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile index d57c1a65b24f..5839077fac91 100644 --- a/arch/arm/boot/dts/Makefile +++ b/arch/arm/boot/dts/Makefile @@ -216,7 +216,7 @@ dtb-$(CONFIG_ARCH_U8500) += ste-snowball.dtb \ dtb-$(CONFIG_ARCH_S3C24XX) += s3c2416-smdk2416.dtb dtb-$(CONFIG_ARCH_S3C64XX) += s3c6410-mini6410.dtb \ s3c6410-smdk6410.dtb -dtb-$(CONFIG_ARCH_SHMOBILE) += emev2-kzm9d.dtb \ +dtb-$(CONFIG_ARCH_SHMOBILE_LEGACY) += emev2-kzm9d.dtb \ r7s72100-genmai.dtb \ r8a7740-armadillo800eva.dtb \ r8a7778-bockw.dtb \ diff --git a/arch/arm/configs/ape6evm_defconfig b/arch/arm/configs/ape6evm_defconfig index 1ce39940795d..cb26c62dc722 100644 --- a/arch/arm/configs/ape6evm_defconfig +++ b/arch/arm/configs/ape6evm_defconfig @@ -13,7 +13,7 @@ CONFIG_EMBEDDED=y CONFIG_PERF_EVENTS=y CONFIG_SLAB=y # CONFIG_BLOCK is not set -CONFIG_ARCH_SHMOBILE=y +CONFIG_ARCH_SHMOBILE_LEGACY=y CONFIG_ARCH_R8A73A4=y CONFIG_MACH_APE6EVM=y # CONFIG_ARM_THUMB is not set diff --git a/arch/arm/configs/armadillo800eva_defconfig b/arch/arm/configs/armadillo800eva_defconfig index fae939d3d7f0..5abf1a2e3160 100644 --- a/arch/arm/configs/armadillo800eva_defconfig +++ b/arch/arm/configs/armadillo800eva_defconfig @@ -15,7 +15,7 @@ CONFIG_MODULE_FORCE_UNLOAD=y # CONFIG_BLK_DEV_BSG is not set # CONFIG_IOSCHED_DEADLINE is not set # CONFIG_IOSCHED_CFQ is not set -CONFIG_ARCH_SHMOBILE=y +CONFIG_ARCH_SHMOBILE_LEGACY=y CONFIG_ARCH_R8A7740=y CONFIG_MACH_ARMADILLO800EVA=y # CONFIG_SH_TIMER_TMU is not set diff --git a/arch/arm/configs/bockw_defconfig b/arch/arm/configs/bockw_defconfig index b38cd107f82d..1dd39716d7cb 100644 --- a/arch/arm/configs/bockw_defconfig +++ b/arch/arm/configs/bockw_defconfig @@ -8,7 +8,7 @@ CONFIG_SYSCTL_SYSCALL=y CONFIG_EMBEDDED=y CONFIG_SLAB=y # CONFIG_IOSCHED_CFQ is not set -CONFIG_ARCH_SHMOBILE=y +CONFIG_ARCH_SHMOBILE_LEGACY=y CONFIG_ARCH_R8A7778=y CONFIG_MACH_BOCKW=y CONFIG_MEMORY_START=0x60000000 diff --git a/arch/arm/configs/koelsch_defconfig b/arch/arm/configs/koelsch_defconfig index 825c16dee8a0..7fd65a01ec7e 100644 --- a/arch/arm/configs/koelsch_defconfig +++ b/arch/arm/configs/koelsch_defconfig @@ -9,7 +9,7 @@ CONFIG_EMBEDDED=y CONFIG_PERF_EVENTS=y CONFIG_SLAB=y # CONFIG_BLOCK is not set -CONFIG_ARCH_SHMOBILE=y +CONFIG_ARCH_SHMOBILE_LEGACY=y CONFIG_ARCH_R8A7791=y CONFIG_MACH_KOELSCH=y # CONFIG_SWP_EMULATE is not set diff --git a/arch/arm/configs/kzm9d_defconfig b/arch/arm/configs/kzm9d_defconfig index 6c37f4a98eb8..217f1dda2965 100644 --- a/arch/arm/configs/kzm9d_defconfig +++ b/arch/arm/configs/kzm9d_defconfig @@ -13,7 +13,7 @@ CONFIG_SLAB=y # CONFIG_BLK_DEV_BSG is not set # CONFIG_IOSCHED_DEADLINE is not set # CONFIG_IOSCHED_CFQ is not set -CONFIG_ARCH_SHMOBILE=y +CONFIG_ARCH_SHMOBILE_LEGACY=y CONFIG_ARCH_EMEV2=y CONFIG_MACH_KZM9D=y CONFIG_MEMORY_START=0x40000000 diff --git a/arch/arm/configs/kzm9g_defconfig b/arch/arm/configs/kzm9g_defconfig index 1ad028023a64..9934dbc23d64 100644 --- a/arch/arm/configs/kzm9g_defconfig +++ b/arch/arm/configs/kzm9g_defconfig @@ -22,7 +22,7 @@ CONFIG_MODULE_UNLOAD=y # CONFIG_BLK_DEV_BSG is not set # CONFIG_IOSCHED_DEADLINE is not set # CONFIG_IOSCHED_CFQ is not set -CONFIG_ARCH_SHMOBILE=y +CONFIG_ARCH_SHMOBILE_LEGACY=y CONFIG_ARCH_SH73A0=y CONFIG_MACH_KZM9G=y CONFIG_MEMORY_START=0x41000000 diff --git a/arch/arm/configs/lager_defconfig b/arch/arm/configs/lager_defconfig index 35bff5e0d57a..35dc8b2be47f 100644 --- a/arch/arm/configs/lager_defconfig +++ b/arch/arm/configs/lager_defconfig @@ -12,7 +12,7 @@ CONFIG_SLAB=y # CONFIG_BLK_DEV_BSG is not set # CONFIG_IOSCHED_DEADLINE is not set # CONFIG_IOSCHED_CFQ is not set -CONFIG_ARCH_SHMOBILE=y +CONFIG_ARCH_SHMOBILE_LEGACY=y CONFIG_ARCH_R8A7790=y CONFIG_MACH_LAGER=y # CONFIG_SH_TIMER_TMU is not set diff --git a/arch/arm/configs/mackerel_defconfig b/arch/arm/configs/mackerel_defconfig index 9fb11895b2e2..a61e1653fc5e 100644 --- a/arch/arm/configs/mackerel_defconfig +++ b/arch/arm/configs/mackerel_defconfig @@ -14,7 +14,7 @@ CONFIG_MODULE_UNLOAD=y # CONFIG_BLK_DEV_BSG is not set # CONFIG_IOSCHED_DEADLINE is not set # CONFIG_IOSCHED_CFQ is not set -CONFIG_ARCH_SHMOBILE=y +CONFIG_ARCH_SHMOBILE_LEGACY=y CONFIG_ARCH_SH7372=y CONFIG_MACH_MACKEREL=y CONFIG_MEMORY_SIZE=0x10000000 diff --git a/arch/arm/configs/marzen_defconfig b/arch/arm/configs/marzen_defconfig index 5cc6360340b1..6981338cd08d 100644 --- a/arch/arm/configs/marzen_defconfig +++ b/arch/arm/configs/marzen_defconfig @@ -9,7 +9,7 @@ CONFIG_SYSCTL_SYSCALL=y CONFIG_EMBEDDED=y CONFIG_SLAB=y # CONFIG_IOSCHED_CFQ is not set -CONFIG_ARCH_SHMOBILE=y +CONFIG_ARCH_SHMOBILE_LEGACY=y CONFIG_ARCH_R8A7779=y CONFIG_MACH_MARZEN=y CONFIG_MEMORY_START=0x60000000 diff --git a/arch/arm/mach-shmobile/Kconfig b/arch/arm/mach-shmobile/Kconfig index 180b71fd86f8..1b7df173db0e 100644 --- a/arch/arm/mach-shmobile/Kconfig +++ b/arch/arm/mach-shmobile/Kconfig @@ -1,6 +1,10 @@ +config ARCH_SHMOBILE + bool + config ARCH_SHMOBILE_MULTI bool "SH-Mobile Series" if ARCH_MULTI_V7 depends on MMU + select ARCH_SHMOBILE select CPU_V7 select GENERIC_CLOCKEVENTS select HAVE_ARM_SCU if SMP @@ -30,7 +34,7 @@ config MACH_KZM9D comment "SH-Mobile System Configuration" endif -if ARCH_SHMOBILE +if ARCH_SHMOBILE_LEGACY comment "SH-Mobile System Type" @@ -272,7 +276,7 @@ source "drivers/sh/Kconfig" endif -if ARCH_SHMOBILE || ARCH_SHMOBILE_MULTI +if ARCH_SHMOBILE menu "Timer and clock configuration" diff --git a/drivers/Makefile b/drivers/Makefile index 3cc8214f9b26..8e3b8b06c0b2 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -118,7 +118,7 @@ obj-$(CONFIG_SGI_SN) += sn/ obj-y += firmware/ obj-$(CONFIG_CRYPTO) += crypto/ obj-$(CONFIG_SUPERH) += sh/ -obj-$(CONFIG_ARCH_SHMOBILE) += sh/ +obj-$(CONFIG_ARCH_SHMOBILE_LEGACY) += sh/ ifndef CONFIG_ARCH_USES_GETTIMEOFFSET obj-y += clocksource/ endif -- cgit v1.2.3 From 350d71b94fc9ed4ba9a349786f928aa5e594adc1 Mon Sep 17 00:00:00 2001 From: Sebastian Hesselbarth Date: Mon, 9 Sep 2013 14:01:20 +0200 Subject: irqchip: add DesignWare APB ICTL interrupt controller This adds an irqchip driver and corresponding devicetree binding for the secondary interrupt controllers based on Synopsys DesignWare IP dw_apb_ictl. Signed-off-by: Sebastian Hesselbarth Reviewed-by: Mark Rutland Reviewed-by: Jisheng Zhang Reviewed-by: Thomas Gleixner --- .../interrupt-controller/snps,dw-apb-ictl.txt | 32 +++++ drivers/irqchip/Kconfig | 4 + drivers/irqchip/Makefile | 1 + drivers/irqchip/irq-dw-apb-ictl.c | 150 +++++++++++++++++++++ 4 files changed, 187 insertions(+) create mode 100644 Documentation/devicetree/bindings/interrupt-controller/snps,dw-apb-ictl.txt create mode 100644 drivers/irqchip/irq-dw-apb-ictl.c (limited to 'drivers') diff --git a/Documentation/devicetree/bindings/interrupt-controller/snps,dw-apb-ictl.txt b/Documentation/devicetree/bindings/interrupt-controller/snps,dw-apb-ictl.txt new file mode 100644 index 000000000000..492911744ca3 --- /dev/null +++ b/Documentation/devicetree/bindings/interrupt-controller/snps,dw-apb-ictl.txt @@ -0,0 +1,32 @@ +Synopsys DesignWare APB interrupt controller (dw_apb_ictl) + +Synopsys DesignWare provides interrupt controller IP for APB known as +dw_apb_ictl. The IP is used as secondary interrupt controller in some SoCs with +APB bus, e.g. Marvell Armada 1500. + +Required properties: +- compatible: shall be "snps,dw-apb-ictl" +- reg: physical base address of the controller and length of memory mapped + region starting with ENABLE_LOW register +- interrupt-controller: identifies the node as an interrupt controller +- #interrupt-cells: number of cells to encode an interrupt-specifier, shall be 1 +- interrupts: interrupt reference to primary interrupt controller +- interrupt-parent: (optional) reference specific primary interrupt controller + +The interrupt sources map to the corresponding bits in the interrupt +registers, i.e. +- 0 maps to bit 0 of low interrupts, +- 1 maps to bit 1 of low interrupts, +- 32 maps to bit 0 of high interrupts, +- 33 maps to bit 1 of high interrupts, +- (optional) fast interrupts start at 64. + +Example: + aic: interrupt-controller@3000 { + compatible = "snps,dw-apb-ictl"; + reg = <0x3000 0xc00>; + interrupt-controller; + #interrupt-cells = <1>; + interrupt-parent = <&gic>; + interrupts = ; + }; diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index 3792a1aa52b8..940638ddc982 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -30,6 +30,10 @@ config ARM_VIC_NR The maximum number of VICs available in the system, for power management. +config DW_APB_ICTL + bool + select IRQ_DOMAIN + config IMGPDC_IRQ bool select GENERIC_IRQ_CHIP diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile index c60b9010b152..6427323af4c3 100644 --- a/drivers/irqchip/Makefile +++ b/drivers/irqchip/Makefile @@ -6,6 +6,7 @@ obj-$(CONFIG_ARCH_MMP) += irq-mmp.o obj-$(CONFIG_ARCH_MVEBU) += irq-armada-370-xp.o obj-$(CONFIG_ARCH_MXS) += irq-mxs.o obj-$(CONFIG_ARCH_S3C24XX) += irq-s3c24xx.o +obj-$(CONFIG_DW_APB_ICTL) += irq-dw-apb-ictl.o obj-$(CONFIG_METAG) += irq-metag-ext.o obj-$(CONFIG_METAG_PERFCOUNTER_IRQS) += irq-metag.o obj-$(CONFIG_ARCH_MOXART) += irq-moxart.o diff --git a/drivers/irqchip/irq-dw-apb-ictl.c b/drivers/irqchip/irq-dw-apb-ictl.c new file mode 100644 index 000000000000..31e231e1f566 --- /dev/null +++ b/drivers/irqchip/irq-dw-apb-ictl.c @@ -0,0 +1,150 @@ +/* + * Synopsys DW APB ICTL irqchip driver. + * + * Sebastian Hesselbarth + * + * based on GPL'ed 2.6 kernel sources + * (c) Marvell International Ltd. + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include +#include +#include +#include +#include + +#include "irqchip.h" + +#define APB_INT_ENABLE_L 0x00 +#define APB_INT_ENABLE_H 0x04 +#define APB_INT_MASK_L 0x08 +#define APB_INT_MASK_H 0x0c +#define APB_INT_FINALSTATUS_L 0x30 +#define APB_INT_FINALSTATUS_H 0x34 + +static void dw_apb_ictl_handler(unsigned int irq, struct irq_desc *desc) +{ + struct irq_chip *chip = irq_get_chip(irq); + struct irq_chip_generic *gc = irq_get_handler_data(irq); + struct irq_domain *d = gc->private; + u32 stat; + int n; + + chained_irq_enter(chip, desc); + + for (n = 0; n < gc->num_ct; n++) { + stat = readl_relaxed(gc->reg_base + + APB_INT_FINALSTATUS_L + 4 * n); + while (stat) { + u32 hwirq = ffs(stat) - 1; + generic_handle_irq(irq_find_mapping(d, + gc->irq_base + hwirq + 32 * n)); + stat &= ~(1 << hwirq); + } + } + + chained_irq_exit(chip, desc); +} + +static int __init dw_apb_ictl_init(struct device_node *np, + struct device_node *parent) +{ + unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN; + struct resource r; + struct irq_domain *domain; + struct irq_chip_generic *gc; + void __iomem *iobase; + int ret, nrirqs, irq; + u32 reg; + + /* Map the parent interrupt for the chained handler */ + irq = irq_of_parse_and_map(np, 0); + if (irq <= 0) { + pr_err("%s: unable to parse irq\n", np->full_name); + return -EINVAL; + } + + ret = of_address_to_resource(np, 0, &r); + if (ret) { + pr_err("%s: unable to get resource\n", np->full_name); + return ret; + } + + if (!request_mem_region(r.start, resource_size(&r), np->full_name)) { + pr_err("%s: unable to request mem region\n", np->full_name); + return -ENOMEM; + } + + iobase = ioremap(r.start, resource_size(&r)); + if (!iobase) { + pr_err("%s: unable to map resource\n", np->full_name); + ret = -ENOMEM; + goto err_release; + } + + /* + * DW IP can be configured to allow 2-64 irqs. We can determine + * the number of irqs supported by writing into enable register + * and look for bits not set, as corresponding flip-flops will + * have been removed by sythesis tool. + */ + + /* mask and enable all interrupts */ + writel(~0, iobase + APB_INT_MASK_L); + writel(~0, iobase + APB_INT_MASK_H); + writel(~0, iobase + APB_INT_ENABLE_L); + writel(~0, iobase + APB_INT_ENABLE_H); + + reg = readl(iobase + APB_INT_ENABLE_H); + if (reg) + nrirqs = 32 + fls(reg); + else + nrirqs = fls(readl(iobase + APB_INT_ENABLE_L)); + + domain = irq_domain_add_linear(np, nrirqs, + &irq_generic_chip_ops, NULL); + if (!domain) { + pr_err("%s: unable to add irq domain\n", np->full_name); + ret = -ENOMEM; + goto err_unmap; + } + + ret = irq_alloc_domain_generic_chips(domain, 32, (nrirqs > 32) ? 2 : 1, + np->name, handle_level_irq, clr, 0, + IRQ_GC_INIT_MASK_CACHE); + if (ret) { + pr_err("%s: unable to alloc irq domain gc\n", np->full_name); + goto err_unmap; + } + + gc = irq_get_domain_generic_chip(domain, 0); + gc->private = domain; + gc->reg_base = iobase; + + gc->chip_types[0].regs.mask = APB_INT_MASK_L; + gc->chip_types[0].chip.irq_mask = irq_gc_mask_set_bit; + gc->chip_types[0].chip.irq_unmask = irq_gc_mask_clr_bit; + + if (nrirqs > 32) { + gc->chip_types[1].regs.mask = APB_INT_MASK_H; + gc->chip_types[1].chip.irq_mask = irq_gc_mask_set_bit; + gc->chip_types[1].chip.irq_unmask = irq_gc_mask_clr_bit; + } + + irq_set_handler_data(irq, gc); + irq_set_chained_handler(irq, dw_apb_ictl_handler); + + return 0; + +err_unmap: + iounmap(iobase); +err_release: + release_mem_region(r.start, resource_size(&r)); + return ret; +} +IRQCHIP_DECLARE(dw_apb_ictl, + "snps,dw-apb-ictl", dw_apb_ictl_init); -- cgit v1.2.3 From 047ef2fa4e687b6c0d4e7d47b8a184147151482c Mon Sep 17 00:00:00 2001 From: Christian Daudt Date: Mon, 23 Sep 2013 10:20:34 -0700 Subject: rename ARCH_BCM to ARCH_BCM_MOBILE (clocksource) Currently ARCH_BCM has been used for Broadcom Mobile V7 based SoCs. In order to allow other Broadcom SoCs to also use mach-bcm directory and files, this patch renames the original ARCH_BCM to ARCH_BCM_MOBILE, and uses ARCH_BCM to define any Broadcom chip residing in mach-bcm directory. Signed-off-by: Christian Daudt Acked-by: Olof Johansson Acked-by: Daniel Lezcano --- drivers/clocksource/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile index 33621efb9148..1f42e8f0d7c2 100644 --- a/drivers/clocksource/Makefile +++ b/drivers/clocksource/Makefile @@ -25,7 +25,7 @@ obj-$(CONFIG_SUN4I_TIMER) += sun4i_timer.o obj-$(CONFIG_ARCH_TEGRA) += tegra20_timer.o obj-$(CONFIG_VT8500_TIMER) += vt8500_timer.o obj-$(CONFIG_ARCH_NSPIRE) += zevio-timer.o -obj-$(CONFIG_ARCH_BCM) += bcm_kona_timer.o +obj-$(CONFIG_ARCH_BCM_MOBILE) += bcm_kona_timer.o obj-$(CONFIG_CADENCE_TTC_TIMER) += cadence_ttc_timer.o obj-$(CONFIG_CLKSRC_EFM32) += time-efm32.o obj-$(CONFIG_CLKSRC_EXYNOS_MCT) += exynos_mct.o -- cgit v1.2.3