From: fabio.estevam@freescale.com (Fabio Estevam)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: mx53: Print silicon revision on boot
Date: Fri, 25 Mar 2011 12:52:47 -0300 [thread overview]
Message-ID: <1301068367-18937-1-git-send-email-fabio.estevam@freescale.com> (raw)
Having the silicon revision to appear on the boot log is a useful information.
MX31, MX35 and MX51 already show the silicon revision on boot.
Add support for displaying such information for MX53 as well.
Tested on a mx53loco board, where it shows:
CPU identified as i.MX53, silicon rev 2.0
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
---
arch/arm/mach-mx5/clock-mx51-mx53.c | 1 +
arch/arm/mach-mx5/cpu.c | 23 +++++++++++++++++++++++
arch/arm/plat-mxc/include/mach/common.h | 1 +
arch/arm/plat-mxc/include/mach/mx53.h | 13 -------------
4 files changed, 25 insertions(+), 13 deletions(-)
diff --git a/arch/arm/mach-mx5/clock-mx51-mx53.c b/arch/arm/mach-mx5/clock-mx51-mx53.c
index cc6ad1c..e014289 100644
--- a/arch/arm/mach-mx5/clock-mx51-mx53.c
+++ b/arch/arm/mach-mx5/clock-mx51-mx53.c
@@ -1555,6 +1555,7 @@ int __init mx53_clocks_init(unsigned long ckil, unsigned long osc,
clk_enable(&iim_clk);
mx53_revision();
clk_disable(&iim_clk);
+ mx53_display_revision();
/* Set SDHC parents to be PLL2 */
clk_set_parent(&esdhc1_clk, &pll2_sw_clk);
diff --git a/arch/arm/mach-mx5/cpu.c b/arch/arm/mach-mx5/cpu.c
index 3b4c307..6ef7856 100644
--- a/arch/arm/mach-mx5/cpu.c
+++ b/arch/arm/mach-mx5/cpu.c
@@ -127,6 +127,29 @@ int mx53_revision(void)
}
EXPORT_SYMBOL(mx53_revision);
+void mx53_display_revision(void)
+{
+ int rev;
+ char *srev;
+ rev = mx53_revision();
+
+ switch (rev) {
+ case IMX_CHIP_REVISION_1_0:
+ srev = IMX_CHIP_REVISION_1_0_STRING;
+ break;
+ case IMX_CHIP_REVISION_2_0:
+ srev = IMX_CHIP_REVISION_2_0_STRING;
+ break;
+ case IMX_CHIP_REVISION_2_1:
+ srev = IMX_CHIP_REVISION_2_1_STRING;
+ break;
+ default:
+ srev = IMX_CHIP_REVISION_UNKNOWN_STRING;
+ }
+ printk(KERN_INFO "CPU identified as i.MX53, silicon rev %s\n", srev);
+}
+EXPORT_SYMBOL(mx53_display_revision);
+
static int __init post_cpu_init(void)
{
unsigned int reg;
diff --git a/arch/arm/plat-mxc/include/mach/common.h b/arch/arm/plat-mxc/include/mach/common.h
index a22ebe1..bfa1ffc 100644
--- a/arch/arm/plat-mxc/include/mach/common.h
+++ b/arch/arm/plat-mxc/include/mach/common.h
@@ -68,4 +68,5 @@ extern void mxc91231_arch_reset(int, const char *);
extern void mxc91231_prepare_idle(void);
extern void mx51_efikamx_reset(void);
extern int mx53_revision(void);
+extern int mx53_display_revision(void);
#endif
diff --git a/arch/arm/plat-mxc/include/mach/mx53.h b/arch/arm/plat-mxc/include/mach/mx53.h
index ace1786..9d2a1ef 100644
--- a/arch/arm/plat-mxc/include/mach/mx53.h
+++ b/arch/arm/plat-mxc/include/mach/mx53.h
@@ -337,17 +337,4 @@
#define MX53_INT_GPIO7_LOW 107
#define MX53_INT_GPIO7_HIGH 108
-/* silicon revisions specific to i.MX53 */
-#define MX53_CHIP_REV_1_0 0x10
-#define MX53_CHIP_REV_1_1 0x11
-#define MX53_CHIP_REV_1_2 0x12
-#define MX53_CHIP_REV_1_3 0x13
-#define MX53_CHIP_REV_2_0 0x20
-#define MX53_CHIP_REV_2_1 0x21
-#define MX53_CHIP_REV_2_2 0x22
-#define MX53_CHIP_REV_2_3 0x23
-#define MX53_CHIP_REV_3_0 0x30
-#define MX53_CHIP_REV_3_1 0x31
-#define MX53_CHIP_REV_3_2 0x32
-
#endif /* ifndef __MACH_MX53_H__ */
--
1.6.0.4
reply other threads:[~2011-03-25 15:52 UTC|newest]
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