From: Fabio Estevam <fabio.estevam@freescale.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 1/2] ARM: mx25: Print the silicon revison
Date: Tue, 30 Aug 2011 10:54:09 -0300 [thread overview]
Message-ID: <1314712450-571-1-git-send-email-fabio.estevam@freescale.com> (raw)
Print the silicon revison during boot.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
---
arch/arm/cpu/arm926ejs/mx25/generic.c | 32 ++++++++++++++++++++++++++++-
arch/arm/include/asm/arch-mx25/imx-regs.h | 4 +++
2 files changed, 35 insertions(+), 1 deletions(-)
diff --git a/arch/arm/cpu/arm926ejs/mx25/generic.c b/arch/arm/cpu/arm926ejs/mx25/generic.c
index 76e4b5c..a4e8c14 100644
--- a/arch/arm/cpu/arm926ejs/mx25/generic.c
+++ b/arch/arm/cpu/arm926ejs/mx25/generic.c
@@ -105,12 +105,42 @@ ulong imx_get_perclk (int clk)
return lldiv (fref, div);
}
+
+u32 get_cpu_rev(void)
+{
+ u32 srev;
+ u32 system_rev = 0x25000;
+
+ /* read SREV register from IIM module */
+ struct iim_regs *iim = (struct iim_regs *)IMX_IIM_BASE;
+ srev = readl(&iim->iim_srev);
+
+ switch (srev) {
+ case 0x00:
+ system_rev |= CHIP_REV_1_0;
+ break;
+ case 0x01:
+ system_rev |= CHIP_REV_1_1;
+ break;
+ default:
+ system_rev |= CHIP_REV_UNKNOWN;
+ break;
+ }
+
+ return system_rev;
+}
+
#if defined(CONFIG_DISPLAY_CPUINFO)
int print_cpuinfo (void)
{
char buf[32];
+ u32 cpurev;
+
+ cpurev = get_cpu_rev();
- printf ("CPU: Freescale i.MX25 at %s MHz\n\n",
+ printf("CPU: Freescale i.MX25 rev%d.%d at %s MHz\n\n",
+ (cpurev & 0x000F0) >> 4,
+ (cpurev & 0x0000F) >> 0,
strmhz (buf, imx_get_armclk ()));
return 0;
}
diff --git a/arch/arm/include/asm/arch-mx25/imx-regs.h b/arch/arm/include/asm/arch-mx25/imx-regs.h
index 9e30f7c..92b58be 100644
--- a/arch/arm/include/asm/arch-mx25/imx-regs.h
+++ b/arch/arm/include/asm/arch-mx25/imx-regs.h
@@ -351,4 +351,8 @@ struct aips_regs {
#define GPIO3_BASE_ADDR IMX_GPIO3_BASE
#define GPIO4_BASE_ADDR IMX_GPIO4_BASE
+#define CHIP_REV_1_0 0x10
+#define CHIP_REV_1_1 0x11
+#define CHIP_REV_UNKNOWN 0xFF
+
#endif /* _IMX_REGS_H */
--
1.7.1
next reply other threads:[~2011-08-30 13:54 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-30 13:54 Fabio Estevam [this message]
2011-08-30 13:54 ` [U-Boot] [PATCH 2/2] ARM: mx25: Print the source of reset Fabio Estevam
2011-09-02 7:50 ` Stefano Babic
2011-09-02 7:38 ` [U-Boot] [PATCH 1/2] ARM: mx25: Print the silicon revison Stefano Babic
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