From mboxrd@z Thu Jan 1 00:00:00 1970 From: festevam@gmail.com (Fabio Estevam) Date: Thu, 3 Mar 2011 21:22:04 -0300 Subject: [PATCH v2] ARM: mx51: Print silicon revision on boot Message-ID: <1299198124-4064-1-git-send-email-festevam@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 --- Changes since v1: - Added patch description arch/arm/mach-mx5/clock-mx51-mx53.c | 1 + arch/arm/mach-mx5/cpu.c | 21 +++++++++++++++++++++ arch/arm/plat-mxc/include/mach/mx51.h | 1 + 3 files changed, 23 insertions(+), 0 deletions(-) diff --git a/arch/arm/mach-mx5/clock-mx51-mx53.c b/arch/arm/mach-mx5/clock-mx51-mx53.c index 652ace4..1282a60 100644 --- a/arch/arm/mach-mx5/clock-mx51-mx53.c +++ b/arch/arm/mach-mx5/clock-mx51-mx53.c @@ -1510,6 +1510,7 @@ int __init mx51_clocks_init(unsigned long ckil, unsigned long osc, clk_enable(&iim_clk); mx51_revision(); + mx51_display_revision(); clk_disable(&iim_clk); /* move usb_phy_clk to 24MHz */ diff --git a/arch/arm/mach-mx5/cpu.c b/arch/arm/mach-mx5/cpu.c index df46b5e..565ed4d 100644 --- a/arch/arm/mach-mx5/cpu.c +++ b/arch/arm/mach-mx5/cpu.c @@ -51,6 +51,27 @@ 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 = "2.0"; + break; + case IMX_CHIP_REVISION_3_0: + srev = "3.0"; + break; + default: + return IMX_CHIP_REVISION_UNKNOWN; + srev = "unknown"; + } + 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 1eb339e..dede19a 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 */ -- 1.6.0.4