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Commit f5f83c71 authored by Thomas Abraham's avatar Thomas Abraham Committed by Kukjin Kim
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ARM: EXYNOS: Create virtual I/O mapping for Chip-ID controller using device tree 



On device tree enabled exynos platforms, retrieve the physical base address
of the chip-id controller from device tree and create a virtual I/O mapping
for the chip-id controller. This helps to remove the chip-id controller entry
from the statically defined I/O mapping tables.

Signed-off-by: default avatarThomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
parent 58a7bbf7

arch/arm/mach-exynos/common.c

+30 −23
Original line number Diff line number Diff line
@@ -119,17 +119,6 @@ static struct map_desc exynos_iodesc[] __initdata = { 
	},

};



#ifdef CONFIG_ARCH_EXYNOS5

static struct map_desc exynos5440_iodesc[] __initdata = {

	{

		.virtual	= (unsigned long)S5P_VA_CHIPID,

		.pfn		= __phys_to_pfn(EXYNOS5440_PA_CHIPID),

		.length		= SZ_4K,

		.type		= MT_DEVICE,

	},

};

#endif



static struct map_desc exynos4_iodesc[] __initdata = {

	{

		.virtual	= (unsigned long)S3C_VA_SYS,
@@ -320,6 +309,31 @@ void __init exynos_init_late(void) 
	exynos_pm_late_initcall();

}



#ifdef CONFIG_OF

int __init exynos_fdt_map_chipid(unsigned long node, const char *uname,

					int depth, void *data)

{

	struct map_desc iodesc;

	__be32 *reg;

	unsigned long len;



	if (!of_flat_dt_is_compatible(node, "samsung,exynos4210-chipid") &&

		!of_flat_dt_is_compatible(node, "samsung,exynos5440-clock"))

		return 0;



	reg = of_get_flat_dt_prop(node, "reg", &len);

	if (reg == NULL || len != (sizeof(unsigned long) * 2))

		return 0;



	iodesc.pfn = __phys_to_pfn(be32_to_cpu(reg[0]));

	iodesc.length = be32_to_cpu(reg[1]) - 1;

	iodesc.virtual = (unsigned long)S5P_VA_CHIPID;

	iodesc.type = MT_DEVICE;

	iotable_init(&iodesc, 1);

	return 1;

}

#endif



/*

 * exynos_map_io

 *
@@ -328,19 +342,12 @@ void __init exynos_init_late(void) 


void __init exynos_init_io(struct map_desc *mach_desc, int size)

{

	struct map_desc *iodesc = exynos_iodesc;

	int iodesc_sz = ARRAY_SIZE(exynos_iodesc);

#if defined(CONFIG_OF) && defined(CONFIG_ARCH_EXYNOS5)

	unsigned long root = of_get_flat_dt_root();



	/* initialize the io descriptors we need for initialization */

	if (of_flat_dt_is_compatible(root, "samsung,exynos5440")) {

		iodesc = exynos5440_iodesc;

		iodesc_sz = ARRAY_SIZE(exynos5440_iodesc);

	}

#ifdef CONFIG_OF

	if (initial_boot_params)

		of_scan_flat_dt(exynos_fdt_map_chipid, NULL);

	else

#endif



	iotable_init(iodesc, iodesc_sz);

		iotable_init(exynos_iodesc, ARRAY_SIZE(exynos_iodesc));



	if (mach_desc)

		iotable_init(mach_desc, size);

arch/arm/mach-exynos/include/mach/map.h

+0 −1
Original line number Diff line number Diff line
@@ -53,7 +53,6 @@ 
#define EXYNOS4_PA_ONENAND_DMA		0x0C600000



#define EXYNOS_PA_CHIPID		0x10000000

#define EXYNOS5440_PA_CHIPID		0x00160000



#define EXYNOS4_PA_SYSCON		0x10010000

#define EXYNOS5_PA_SYSCON		0x10050100