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authorJason Liu <jason.hui@linaro.org>2011-08-26 09:35:21 +0400
committerSascha Hauer <s.hauer@pengutronix.de>2011-08-26 10:50:59 +0400
commitab116a86faf6aeafd0acf766c0c5d9475bf8493e (patch)
tree06d70594ebff86d1ea529308e08e7106ba46f0be /arch/arm/mach-imx/cpu-imx31.c
parent3f5492c51367ed7bf39eaf9f86ba5b4f8a27a111 (diff)
downloadlinux-ab116a86faf6aeafd0acf766c0c5d9475bf8493e.tar.xz
ARM: mx31: use generic function for displaying silicon revision
Update to use generic function for displaying silicon revision Tested on mx31pdk board as print the following information: CPU identified as i.MX31, silicon rev 2.0 Signed-off-by: Jason Liu <jason.hui@linaro.org> Cc: Fabio Estevam <fabio.estevam@freescale.com> Cc: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/mach-imx/cpu-imx31.c')
-rw-r--r--arch/arm/mach-imx/cpu-imx31.c49
1 files changed, 27 insertions, 22 deletions
diff --git a/arch/arm/mach-imx/cpu-imx31.c b/arch/arm/mach-imx/cpu-imx31.c
index a3780700a882..3f2345f0cdaf 100644
--- a/arch/arm/mach-imx/cpu-imx31.c
+++ b/arch/arm/mach-imx/cpu-imx31.c
@@ -13,45 +13,50 @@
#include <linux/io.h>
#include <mach/hardware.h>
#include <mach/iim.h>
+#include <mach/common.h>
-unsigned int mx31_cpu_rev;
-EXPORT_SYMBOL(mx31_cpu_rev);
+static int mx31_cpu_rev = -1;
static struct {
u8 srev;
const char *name;
- const char *v;
unsigned int rev;
-} mx31_cpu_type[] __initdata = {
- { .srev = 0x00, .name = "i.MX31(L)", .v = "1.0", .rev = IMX_CHIP_REVISION_1_0 },
- { .srev = 0x10, .name = "i.MX31", .v = "1.1", .rev = IMX_CHIP_REVISION_1_1 },
- { .srev = 0x11, .name = "i.MX31L", .v = "1.1", .rev = IMX_CHIP_REVISION_1_1 },
- { .srev = 0x12, .name = "i.MX31", .v = "1.15", .rev = IMX_CHIP_REVISION_1_1 },
- { .srev = 0x13, .name = "i.MX31L", .v = "1.15", .rev = IMX_CHIP_REVISION_1_1 },
- { .srev = 0x14, .name = "i.MX31", .v = "1.2", .rev = IMX_CHIP_REVISION_1_2 },
- { .srev = 0x15, .name = "i.MX31L", .v = "1.2", .rev = IMX_CHIP_REVISION_1_2 },
- { .srev = 0x28, .name = "i.MX31", .v = "2.0", .rev = IMX_CHIP_REVISION_2_0 },
- { .srev = 0x29, .name = "i.MX31L", .v = "2.0", .rev = IMX_CHIP_REVISION_2_0 },
+} mx31_cpu_type[] = {
+ { .srev = 0x00, .name = "i.MX31(L)", .rev = IMX_CHIP_REVISION_1_0 },
+ { .srev = 0x10, .name = "i.MX31", .rev = IMX_CHIP_REVISION_1_1 },
+ { .srev = 0x11, .name = "i.MX31L", .rev = IMX_CHIP_REVISION_1_1 },
+ { .srev = 0x12, .name = "i.MX31", .rev = IMX_CHIP_REVISION_1_1 },
+ { .srev = 0x13, .name = "i.MX31L", .rev = IMX_CHIP_REVISION_1_1 },
+ { .srev = 0x14, .name = "i.MX31", .rev = IMX_CHIP_REVISION_1_2 },
+ { .srev = 0x15, .name = "i.MX31L", .rev = IMX_CHIP_REVISION_1_2 },
+ { .srev = 0x28, .name = "i.MX31", .rev = IMX_CHIP_REVISION_2_0 },
+ { .srev = 0x29, .name = "i.MX31L", .rev = IMX_CHIP_REVISION_2_0 },
};
-void __init mx31_read_cpu_rev(void)
+static int mx31_read_cpu_rev(void)
{
u32 i, srev;
/* read SREV register from IIM module */
srev = __raw_readl(MX31_IO_ADDRESS(MX31_IIM_BASE_ADDR + MXC_IIMSREV));
+ srev &= 0xff;
for (i = 0; i < ARRAY_SIZE(mx31_cpu_type); i++)
if (srev == mx31_cpu_type[i].srev) {
- printk(KERN_INFO
- "CPU identified as %s, silicon rev %s\n",
- mx31_cpu_type[i].name, mx31_cpu_type[i].v);
-
- mx31_cpu_rev = mx31_cpu_type[i].rev;
- return;
+ imx_print_silicon_rev(mx31_cpu_type[i].name,
+ mx31_cpu_type[i].rev);
+ return mx31_cpu_type[i].rev;
}
- mx31_cpu_rev = IMX_CHIP_REVISION_UNKNOWN;
+ imx_print_silicon_rev("i.MX31", IMX_CHIP_REVISION_UNKNOWN);
+ return IMX_CHIP_REVISION_UNKNOWN;
+}
+
+int mx31_revision(void)
+{
+ if (mx31_cpu_rev == -1)
+ mx31_cpu_rev = mx31_read_cpu_rev();
- printk(KERN_WARNING "Unknown CPU identifier. srev = %02x\n", srev);
+ return mx31_cpu_rev;
}
+EXPORT_SYMBOL(mx31_revision);