From 76422dbf3ccdd46d925cdb0909445e4616b55187 Mon Sep 17 00:00:00 2001 From: Fabio Estevam Date: Thu, 17 Mar 2011 23:32:11 -0300 Subject: [PATCH] ARM: mx51: Print silicon revision on boot Having the silicon revision to appear on the boot log is a useful information. MX31 and MX35 already show the silicon revision on boot. Add support for displaying such information for MX51 as well. Tested on a MX51EVK, where it shows: CPU identified as i.MX51, silicon rev 3.0 Signed-off-by: Fabio Estevam Signed-off-by: Sascha Hauer --- arch/arm/mach-mx5/clock-mx51-mx53.c | 1 + arch/arm/mach-mx5/cpu.c | 20 ++++++++++++++++++++ arch/arm/plat-mxc/include/mach/mx51.h | 1 + arch/arm/plat-mxc/include/mach/mxc.h | 14 ++++++++++++++ 4 files changed, 36 insertions(+) diff --git a/arch/arm/mach-mx5/clock-mx51-mx53.c b/arch/arm/mach-mx5/clock-mx51-mx53.c index 652ace413825..cc6ad1cf48db 100644 --- a/arch/arm/mach-mx5/clock-mx51-mx53.c +++ b/arch/arm/mach-mx5/clock-mx51-mx53.c @@ -1511,6 +1511,7 @@ int __init mx51_clocks_init(unsigned long ckil, unsigned long osc, clk_enable(&iim_clk); mx51_revision(); clk_disable(&iim_clk); + mx51_display_revision(); /* move usb_phy_clk to 24MHz */ clk_set_parent(&usb_phy1_clk, &osc_clk); diff --git a/arch/arm/mach-mx5/cpu.c b/arch/arm/mach-mx5/cpu.c index df46b5e60857..3b4c30743052 100644 --- a/arch/arm/mach-mx5/cpu.c +++ b/arch/arm/mach-mx5/cpu.c @@ -51,6 +51,26 @@ int mx51_revision(void) } EXPORT_SYMBOL(mx51_revision); +void mx51_display_revision(void) +{ + int rev; + char *srev; + rev = mx51_revision(); + + switch (rev) { + case IMX_CHIP_REVISION_2_0: + srev = IMX_CHIP_REVISION_2_0_STRING; + break; + case IMX_CHIP_REVISION_3_0: + srev = IMX_CHIP_REVISION_3_0_STRING; + break; + default: + srev = IMX_CHIP_REVISION_UNKNOWN_STRING; + } + printk(KERN_INFO "CPU identified as i.MX51, silicon rev %s\n", srev); +} +EXPORT_SYMBOL(mx51_display_revision); + #ifdef CONFIG_NEON /* diff --git a/arch/arm/plat-mxc/include/mach/mx51.h b/arch/arm/plat-mxc/include/mach/mx51.h index 1eb339e6c857..dede19a766ff 100644 --- a/arch/arm/plat-mxc/include/mach/mx51.h +++ b/arch/arm/plat-mxc/include/mach/mx51.h @@ -347,6 +347,7 @@ #if !defined(__ASSEMBLY__) && !defined(__MXC_BOOT_UNCOMPRESS) extern int mx51_revision(void); +extern void mx51_display_revision(void); #endif /* tape-out 1 defines */ diff --git a/arch/arm/plat-mxc/include/mach/mxc.h b/arch/arm/plat-mxc/include/mach/mxc.h index 7e072637eefa..3322c7a79c57 100644 --- a/arch/arm/plat-mxc/include/mach/mxc.h +++ b/arch/arm/plat-mxc/include/mach/mxc.h @@ -51,6 +51,20 @@ #define IMX_CHIP_REVISION_3_3 0x33 #define IMX_CHIP_REVISION_UNKNOWN 0xff +#define IMX_CHIP_REVISION_1_0_STRING "1.0" +#define IMX_CHIP_REVISION_1_1_STRING "1.1" +#define IMX_CHIP_REVISION_1_2_STRING "1.2" +#define IMX_CHIP_REVISION_1_3_STRING "1.3" +#define IMX_CHIP_REVISION_2_0_STRING "2.0" +#define IMX_CHIP_REVISION_2_1_STRING "2.1" +#define IMX_CHIP_REVISION_2_2_STRING "2.2" +#define IMX_CHIP_REVISION_2_3_STRING "2.3" +#define IMX_CHIP_REVISION_3_0_STRING "3.0" +#define IMX_CHIP_REVISION_3_1_STRING "3.1" +#define IMX_CHIP_REVISION_3_2_STRING "3.2" +#define IMX_CHIP_REVISION_3_3_STRING "3.3" +#define IMX_CHIP_REVISION_UNKNOWN_STRING "unknown" + #ifndef __ASSEMBLY__ extern unsigned int __mxc_cpu_type; #endif -- 2.20.1