From fce9e5bb25264153f9f002eada41757118d25ba9 Mon Sep 17 00:00:00 2001 From: Pankaj Dubey Date: Fri, 11 Jul 2014 08:08:29 +0900 Subject: [PATCH] ARM: EXYNOS: Add support for mapping PMU base address via DT Add support for mapping Samsung Power Management Unit (PMU) base address from device tree. Signed-off-by: Pankaj Dubey Reviewed-by: Tomasz Figa Signed-off-by: Kukjin Kim --- arch/arm/mach-exynos/common.h | 1 + arch/arm/mach-exynos/exynos.c | 37 +++++++++++++++++++++++++++++++++++++ 2 files changed, 38 insertions(+) diff --git a/arch/arm/mach-exynos/common.h b/arch/arm/mach-exynos/common.h index 152b46417112..f8daa9cc5617 100644 --- a/arch/arm/mach-exynos/common.h +++ b/arch/arm/mach-exynos/common.h @@ -113,6 +113,7 @@ IS_SAMSUNG_CPU(exynos5800, EXYNOS5800_SOC_ID, EXYNOS5_SOC_MASK) extern void __iomem *sysram_ns_base_addr; extern void __iomem *sysram_base_addr; +extern void __iomem *pmu_base_addr; void exynos_sysram_init(void); void exynos_firmware_init(void); diff --git a/arch/arm/mach-exynos/exynos.c b/arch/arm/mach-exynos/exynos.c index 269526bcc039..80cbbc74d2c8 100644 --- a/arch/arm/mach-exynos/exynos.c +++ b/arch/arm/mach-exynos/exynos.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include @@ -31,6 +32,8 @@ #include "regs-pmu.h" #include "regs-sys.h" +void __iomem *pmu_base_addr; + static struct map_desc exynos4_iodesc[] __initdata = { { .virtual = (unsigned long)S3C_VA_SYS, @@ -264,6 +267,39 @@ static void __init exynos_init_io(void) exynos_map_io(); } +static const struct of_device_id exynos_dt_pmu_match[] = { + { .compatible = "samsung,exynos3250-pmu" }, + { .compatible = "samsung,exynos4210-pmu" }, + { .compatible = "samsung,exynos4212-pmu" }, + { .compatible = "samsung,exynos4412-pmu" }, + { .compatible = "samsung,exynos5250-pmu" }, + { .compatible = "samsung,exynos5420-pmu" }, + { /*sentinel*/ }, +}; + +static void exynos_map_pmu(void) +{ + struct device_node *np; + + np = of_find_matching_node(NULL, exynos_dt_pmu_match); + if (np) + pmu_base_addr = of_iomap(np, 0); + + if (!pmu_base_addr) + panic("failed to find exynos pmu register\n"); +} + +static void __init exynos_init_irq(void) +{ + irqchip_init(); + /* + * Since platsmp.c needs pmu base address by the time + * DT is not unflatten so we can't use DT APIs before + * init_irq + */ + exynos_map_pmu(); +} + static void __init exynos_dt_machine_init(void) { struct device_node *i2c_np; @@ -344,6 +380,7 @@ DT_MACHINE_START(EXYNOS_DT, "SAMSUNG EXYNOS (Flattened Device Tree)") .smp = smp_ops(exynos_smp_ops), .map_io = exynos_init_io, .init_early = exynos_firmware_init, + .init_irq = exynos_init_irq, .init_machine = exynos_dt_machine_init, .init_late = exynos_init_late, .dt_compat = exynos_dt_compat, -- 2.11.0