From e074f9803227236252c8e7be16d836d709abff57 Mon Sep 17 00:00:00 2001 From: Ben Dooks Date: Tue, 24 Mar 2009 17:31:42 +0000 Subject: [PATCH] [ARM] S3C64XX: Add S3C6400 CPU detection. Add detection support for the S3C6400 SoC which has it's id register in a different place to the S3C6410. Signed-off-by: Ben Dooks --- arch/arm/plat-s3c64xx/cpu.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/arm/plat-s3c64xx/cpu.c b/arch/arm/plat-s3c64xx/cpu.c index f9fdaab32ab4..19f68b5f0d36 100644 --- a/arch/arm/plat-s3c64xx/cpu.c +++ b/arch/arm/plat-s3c64xx/cpu.c @@ -126,6 +126,14 @@ void __init s3c64xx_init_io(struct map_desc *mach_desc, int size) iotable_init(mach_desc, size); idcode = __raw_readl(S3C_VA_SYS + 0x118); + if (!idcode) { + /* S3C6400 has the ID register in a different place, + * and needs a write before it can be read. */ + + __raw_writel(0x0, S3C_VA_SYS + 0xA1C); + idcode = __raw_readl(S3C_VA_SYS + 0xA1C); + } + s3c_init_cpu(idcode, cpu_ids, ARRAY_SIZE(cpu_ids)); } -- 2.39.5