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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>
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@ -113,6 +113,7 @@ IS_SAMSUNG_CPU(exynos5800, EXYNOS5800_SOC_ID, EXYNOS5_SOC_MASK)
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extern void __iomem *sysram_ns_base_addr;
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extern void __iomem *sysram_base_addr;
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extern void __iomem *pmu_base_addr;
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void exynos_sysram_init(void);
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void exynos_firmware_init(void);
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@ -19,6 +19,7 @@
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/pm_domain.h>
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#include <linux/irqchip.h>
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#include <asm/cacheflush.h>
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#include <asm/hardware/cache-l2x0.h>
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@ -31,6 +32,8 @@
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#include "regs-pmu.h"
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#include "regs-sys.h"
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void __iomem *pmu_base_addr;
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static struct map_desc exynos4_iodesc[] __initdata = {
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{
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.virtual = (unsigned long)S3C_VA_SYS,
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@ -264,6 +267,39 @@ static void __init exynos_init_io(void)
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exynos_map_io();
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}
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static const struct of_device_id exynos_dt_pmu_match[] = {
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{ .compatible = "samsung,exynos3250-pmu" },
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{ .compatible = "samsung,exynos4210-pmu" },
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{ .compatible = "samsung,exynos4212-pmu" },
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{ .compatible = "samsung,exynos4412-pmu" },
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{ .compatible = "samsung,exynos5250-pmu" },
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{ .compatible = "samsung,exynos5420-pmu" },
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{ /*sentinel*/ },
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};
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static void exynos_map_pmu(void)
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{
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struct device_node *np;
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np = of_find_matching_node(NULL, exynos_dt_pmu_match);
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if (np)
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pmu_base_addr = of_iomap(np, 0);
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if (!pmu_base_addr)
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panic("failed to find exynos pmu register\n");
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}
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static void __init exynos_init_irq(void)
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{
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irqchip_init();
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/*
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* Since platsmp.c needs pmu base address by the time
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* DT is not unflatten so we can't use DT APIs before
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* init_irq
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*/
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exynos_map_pmu();
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}
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static void __init exynos_dt_machine_init(void)
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{
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struct device_node *i2c_np;
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@ -344,6 +380,7 @@ DT_MACHINE_START(EXYNOS_DT, "SAMSUNG EXYNOS (Flattened Device Tree)")
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.smp = smp_ops(exynos_smp_ops),
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.map_io = exynos_init_io,
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.init_early = exynos_firmware_init,
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.init_irq = exynos_init_irq,
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.init_machine = exynos_dt_machine_init,
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.init_late = exynos_init_late,
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.dt_compat = exynos_dt_compat,
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