diff options
Diffstat (limited to 'arch/arm/mach-imx/imx51.c')
-rw-r--r-- | arch/arm/mach-imx/imx51.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/imx51.c b/arch/arm/mach-imx/imx51.c index 8c4fc11a0c..075ed22f20 100644 --- a/arch/arm/mach-imx/imx51.c +++ b/arch/arm/mach-imx/imx51.c @@ -15,7 +15,10 @@ * MA 02111-1307 USA */ +#include <init.h> #include <common.h> +#include <asm/io.h> +#include <mach/imx51-regs.h> #include "gpio.h" @@ -28,3 +31,51 @@ void *imx_gpio_base[] = { int imx_gpio_count = ARRAY_SIZE(imx_gpio_base) * 32; +#define SI_REV 0x48 + +static u32 mx51_silicon_revision; +static char *mx51_rev_string = "unknown"; + +int imx_silicon_revision(void) +{ + return mx51_silicon_revision; +} + +static int query_silicon_revision(void) +{ + void __iomem *rom = MX51_IROM_BASE_ADDR; + u32 rev; + + rev = readl(rom + SI_REV); + switch (rev) { + case 0x1: + mx51_silicon_revision = MX51_CHIP_REV_1_0; + mx51_rev_string = "1.0"; + break; + case 0x2: + mx51_silicon_revision = MX51_CHIP_REV_1_1; + mx51_rev_string = "1.1"; + break; + case 0x10: + mx51_silicon_revision = MX51_CHIP_REV_2_0; + mx51_rev_string = "2.0"; + break; + case 0x20: + mx51_silicon_revision = MX51_CHIP_REV_3_0; + mx51_rev_string = "3.0"; + break; + default: + mx51_silicon_revision = 0; + } + + return 0; +} +core_initcall(query_silicon_revision); + +static int imx51_print_silicon_rev(void) +{ + printf("detected i.MX51 rev %s\n", mx51_rev_string); + + return 0; +} +device_initcall(imx51_print_silicon_rev); |