From fdbb740d7c3fd701ca3af1f6033060cfd358c2bc Mon Sep 17 00:00:00 2001 From: Przemyslaw Marczak Date: Tue, 27 Oct 2015 13:07:55 +0100 Subject: [PATCH] s5p: cpu_info: print "cpu-model" if exists in dts The CPU name for Exynos was concatenated with cpu id, but for new Exynos platforms, like Chromebook Peach Pi based on Exynos5800, the name of SoC variant does not include the real SoC cpu id (0x5422). For such case, the CPU name should be defined in device tree. This commit introduces new device-tree property for Exynos: - "cpu-model" - with cpu name string If defined, then the cpu id is not printed. Signed-off-by: Przemyslaw Marczak Cc: Minkyu Kang Cc: Simon Glass Reviewed-by: Simon Glass Tested-by: Anand Moon Signed-off-by: Minkyu Kang --- arch/arm/cpu/armv7/s5p-common/cpu_info.c | 14 +++++++++++++- doc/device-tree-bindings/exynos/soc.txt | 21 +++++++++++++++++++++ 2 files changed, 34 insertions(+), 1 deletion(-) create mode 100644 doc/device-tree-bindings/exynos/soc.txt diff --git a/arch/arm/cpu/armv7/s5p-common/cpu_info.c b/arch/arm/cpu/armv7/s5p-common/cpu_info.c index 154d67490d..764c6614ea 100644 --- a/arch/arm/cpu/armv7/s5p-common/cpu_info.c +++ b/arch/arm/cpu/armv7/s5p-common/cpu_info.c @@ -5,9 +5,12 @@ * SPDX-License-Identifier: GPL-2.0+ */ #include +#include #include #include +DECLARE_GLOBAL_DATA_PTR; + /* Default is s5pc100 */ unsigned int s5p_cpu_id = 0xC100; /* Default is EVT1 */ @@ -30,7 +33,16 @@ u32 get_device_type(void) #ifdef CONFIG_DISPLAY_CPUINFO int print_cpuinfo(void) { - printf("CPU: %s%X @ ", s5p_get_cpu_name(), s5p_cpu_id); + const char *cpu_model; + int len; + + /* For SoC with no real CPU ID in naming convention. */ + cpu_model = fdt_getprop(gd->fdt_blob, 0, "cpu-model", &len); + if (cpu_model) + printf("CPU: %.*s @ ", len, cpu_model); + else + printf("CPU: %s%X @ ", s5p_get_cpu_name(), s5p_cpu_id); + print_freq(get_arm_clk(), "\n"); return 0; diff --git a/doc/device-tree-bindings/exynos/soc.txt b/doc/device-tree-bindings/exynos/soc.txt new file mode 100644 index 0000000000..9ba6f3b9f8 --- /dev/null +++ b/doc/device-tree-bindings/exynos/soc.txt @@ -0,0 +1,21 @@ +Exynos SoC model + +The "cpu-model" property is a non-standard extension for the device tree root +node. Since the cpu id of some Exynos variants does not correspond to product +name, this property fills the gap. + +For almost all Exynos based boards in the kernel, the product name corresponds +to the device tree file name. The same name is generated in U-Boot, so the new +property allows doing it automatically. + +Required properties: + - cpu-model : Exynos product name + +Example: + +/ { + model = "Samsung/Google Peach Pi board based on Exynos5800"; + cpu-model = "Exynos5800"; + + compatible = ... +}; -- 2.39.5