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| author | Pankaj Dubey <pankaj.dubey@samsung.com> | 2014-07-11 08:08:29 +0900 |
|---|---|---|
| committer | Kukjin Kim <kgene.kim@samsung.com> | 2014-07-15 08:40:32 +0900 |
| commit | fce9e5bb25264153f9f002eada41757118d25ba9 (patch) | |
| tree | fe13933c80c122ffd0cd782edfc2ef1535f86223 /arch/arm/mach-exynos/exynos.c | |
| parent | 632b98ae8adbe12fda9d1f4cc6c0c177bcb44b1e (diff) | |
| download | lwn-fce9e5bb25264153f9f002eada41757118d25ba9.tar.gz lwn-fce9e5bb25264153f9f002eada41757118d25ba9.zip | |
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 <pankaj.dubey@samsung.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'arch/arm/mach-exynos/exynos.c')
| -rw-r--r-- | arch/arm/mach-exynos/exynos.c | 37 |
1 files changed, 37 insertions, 0 deletions
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 <linux/of_platform.h> #include <linux/platform_device.h> #include <linux/pm_domain.h> +#include <linux/irqchip.h> #include <asm/cacheflush.h> #include <asm/hardware/cache-l2x0.h> @@ -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, |