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Commit fce9e5bb authored by Pankaj Dubey's avatar Pankaj Dubey Committed by Kukjin Kim
Browse files

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: default avatarPankaj Dubey <pankaj.dubey@samsung.com>
Reviewed-by: default avatarTomasz Figa <t.figa@samsung.com>
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
parent 632b98ae

arch/arm/mach-exynos/common.h

+1 −0
Original line number Diff line number Diff line
@@ -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);

arch/arm/mach-exynos/exynos.c

+37 −0
Original line number Diff line number Diff line
@@ -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,