diff options
author | Olof Johansson <olof@lixom.net> | 2013-04-28 12:24:08 -0700 |
---|---|---|
committer | Olof Johansson <olof@lixom.net> | 2013-04-28 12:24:20 -0700 |
commit | 775c4f66fd855e68a98fc5049003810fe98e2e20 (patch) | |
tree | f5d8e44d5a335b60ee6e3d480a3f3a854b85d974 /arch/arm/mach-exynos/common.c | |
parent | a4591dcf743ac841f9a7d81399405b8fe77c87bf (diff) | |
parent | 096ee6adcfb79a13ae04150023725c8a67e00ae8 (diff) |
Merge tag 'late-exynos-v3-for-v3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into late/dt
From Kukjin Kim:
This allows that device tree enables platform to setup a runtime IO
mapping for the chip id
* tag 'late-exynos-v3-for-v3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
ARM: dts: Add chip-id controller node on Exynos4/5 SoC
ARM: EXYNOS: Create virtual I/O mapping for Chip-ID controller using device tree
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'arch/arm/mach-exynos/common.c')
-rw-r--r-- | arch/arm/mach-exynos/common.c | 53 |
1 files changed, 30 insertions, 23 deletions
diff --git a/arch/arm/mach-exynos/common.c b/arch/arm/mach-exynos/common.c index d3efd6768ff8..3f945cf92c0f 100644 --- a/arch/arm/mach-exynos/common.c +++ b/arch/arm/mach-exynos/common.c @@ -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); |