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| author | Eric Bénard <eric@eukrea.com> | 2010-10-08 16:00:10 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2010-10-11 15:28:32 +0200 |
| commit | 67520f3a896acb1635894fd25626f7fa7c91e61c (patch) | |
| tree | adf892987b6ae02cf42fa469a106d102b53d9e2d | |
| parent | fdb03870a9714ba2695daa0c2b3e6b6be4318e9d (diff) | |
| download | linux-67520f3a896acb1635894fd25626f7fa7c91e61c.tar.gz linux-67520f3a896acb1635894fd25626f7fa7c91e61c.tar.bz2 linux-67520f3a896acb1635894fd25626f7fa7c91e61c.zip | |
ARM: mx35: Add mx35_revision function to query the silicon revision
Based on work done earlier by Sascha Hauer
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Eric Bénard <eric@eukrea.com>
[ukl: actually squash the two approaches together]
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| -rw-r--r-- | arch/arm/mach-mx3/clock-imx35.c | 3 | ||||
| -rw-r--r-- | arch/arm/mach-mx3/cpu.c | 27 | ||||
| -rw-r--r-- | arch/arm/plat-mxc/include/mach/mx35.h | 18 | ||||
| -rw-r--r-- | arch/arm/plat-mxc/include/mach/mx3x.h | 10 |
4 files changed, 43 insertions, 15 deletions
diff --git a/arch/arm/mach-mx3/clock-imx35.c b/arch/arm/mach-mx3/clock-imx35.c index f08b407cdb3f..9a1009884164 100644 --- a/arch/arm/mach-mx3/clock-imx35.c +++ b/arch/arm/mach-mx3/clock-imx35.c @@ -535,6 +535,9 @@ int __init mx35_clocks_init() __raw_writel(cgr2, CCM_BASE + CCM_CGR2); __raw_writel(cgr3, CCM_BASE + CCM_CGR3); + clk_enable(&iim_clk); + mx35_read_cpu_rev(); + #ifdef CONFIG_MXC_USE_EPIT epit_timer_init(&epit1_clk, MX35_IO_ADDRESS(MX35_EPIT1_BASE_ADDR), MX35_INT_EPIT1); diff --git a/arch/arm/mach-mx3/cpu.c b/arch/arm/mach-mx3/cpu.c index 47b0573c11f5..d00a75457812 100644 --- a/arch/arm/mach-mx3/cpu.c +++ b/arch/arm/mach-mx3/cpu.c @@ -55,3 +55,30 @@ void __init mx31_read_cpu_rev(void) printk(KERN_WARNING "Unknown CPU identifier. srev = %02x\n", srev); } + +unsigned int mx35_cpu_rev; +EXPORT_SYMBOL(mx35_cpu_rev); + +void __init mx35_read_cpu_rev(void) +{ + u32 rev; + char *srev = "unknown"; + + rev = __raw_readl(MX35_IO_ADDRESS(MX35_IIM_BASE_ADDR + MXC_IIMSREV)); + switch (rev) { + case 0x00: + mx35_cpu_rev = MX3x_CHIP_REV_1_0; + srev = "1.0"; + break; + case 0x10: + mx35_cpu_rev = MX3x_CHIP_REV_2_0; + srev = "2.0"; + break; + case 0x11: + mx35_cpu_rev = MX3x_CHIP_REV_2_1; + srev = "2.1"; + break; + } + + printk(KERN_INFO "CPU identified as i.MX35, silicon rev %s\n", srev); +} diff --git a/arch/arm/plat-mxc/include/mach/mx35.h b/arch/arm/plat-mxc/include/mach/mx35.h index 5a1c621aeba1..cb071b7b17e5 100644 --- a/arch/arm/plat-mxc/include/mach/mx35.h +++ b/arch/arm/plat-mxc/include/mach/mx35.h @@ -1,5 +1,6 @@ #ifndef __MACH_MX35_H__ #define __MACH_MX35_H__ + /* * IRAM */ @@ -66,6 +67,8 @@ #define MX35_CAN1_BASE_ADDR (MX35_AIPS2_BASE_ADDR + 0xe4000) #define MX35_CAN2_BASE_ADDR (MX35_AIPS2_BASE_ADDR + 0xe8000) #define MX35_RTIC_BASE_ADDR (MX35_AIPS2_BASE_ADDR + 0xec000) +#define MX35_IIM_BASE_ADDR (MX35_AIPS2_BASE_ADDR + 0xf0000) + #define MX35_OTG_BASE_ADDR 0x53ff4000 #define MX35_ROMP_BASE_ADDR 0x60000000 @@ -187,20 +190,7 @@ #define MX35_PROD_SIGNATURE 0x1 /* For MX31 */ -/* silicon revisions specific to i.MX31 */ -#define MX35_CHIP_REV_1_0 0x10 -#define MX35_CHIP_REV_1_1 0x11 -#define MX35_CHIP_REV_1_2 0x12 -#define MX35_CHIP_REV_1_3 0x13 -#define MX35_CHIP_REV_2_0 0x20 -#define MX35_CHIP_REV_2_1 0x21 -#define MX35_CHIP_REV_2_2 0x22 -#define MX35_CHIP_REV_2_3 0x23 -#define MX35_CHIP_REV_3_0 0x30 -#define MX35_CHIP_REV_3_1 0x31 -#define MX35_CHIP_REV_3_2 0x32 - -#define MX35_SYSTEM_REV_MIN MX35_CHIP_REV_1_0 +#define MX35_SYSTEM_REV_MIN MX3x_CHIP_REV_1_0 #define MX35_SYSTEM_REV_NUM 3 #ifdef IMX_NEEDS_DEPRECATED_SYMBOLS diff --git a/arch/arm/plat-mxc/include/mach/mx3x.h b/arch/arm/plat-mxc/include/mach/mx3x.h index d41ad68c1315..d1bd26d7b8a6 100644 --- a/arch/arm/plat-mxc/include/mach/mx3x.h +++ b/arch/arm/plat-mxc/include/mach/mx3x.h @@ -240,7 +240,7 @@ #define MX3x_PROD_SIGNATURE 0x1 /* For MX31 */ -/* silicon revisions specific to i.MX31 */ +/* silicon revisions specific to i.MX31 and i.MX35 */ #define MX3x_CHIP_REV_1_0 0x10 #define MX3x_CHIP_REV_1_1 0x11 #define MX3x_CHIP_REV_1_2 0x12 @@ -267,6 +267,14 @@ static inline int mx31_revision(void) { return mx31_cpu_rev; } + +extern unsigned int mx35_cpu_rev; +extern void mx35_read_cpu_rev(void); + +static inline int mx35_revision(void) +{ + return mx35_cpu_rev; +} #endif #ifdef IMX_NEEDS_DEPRECATED_SYMBOLS |