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ARM: EXYNOS: use chip_id reg in uncompress to select uart base phys

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Signed-off-by: Dima Zavin <dima@android.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Dima Zavin 2012-04-04 09:27:37 -07:00 committed by Kukjin Kim
parent fd9abe1b5b
commit 6aa51068f5
1 changed files with 16 additions and 1 deletions
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17
arch/arm/mach-exynos/include/mach/uncompress.h
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@ -20,9 +20,24 @@ volatile u8 *uart_base;
#include <plat/uncompress.h>
static unsigned int __raw_readl(unsigned int ptr)
{
return *((volatile unsigned int *)ptr);
}
static void arch_detect_cpu(void)
{
if (machine_is_smdk5250())
u32 chip_id = __raw_readl(EXYNOS_PA_CHIPID);
/*
* product_id is bits 31:12
* bits 23:20 describe the exynosX family
*
*/
chip_id >>= 20;
chip_id &= 0xf;
if (chip_id == 0x5)
uart_base = (volatile u8 *)EXYNOS5_PA_UART + (S3C_UART_OFFSET * CONFIG_S3C_LOWLEVEL_UART_PORT);
else
uart_base = (volatile u8 *)EXYNOS4_PA_UART + (S3C_UART_OFFSET * CONFIG_S3C_LOWLEVEL_UART_PORT);