diff options
Diffstat (limited to 'arch/arm/mach-imx/cpu-imx5.c')
| -rw-r--r-- | arch/arm/mach-imx/cpu-imx5.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/arch/arm/mach-imx/cpu-imx5.c b/arch/arm/mach-imx/cpu-imx5.c index c1c99a7..3403bac 100644 --- a/arch/arm/mach-imx/cpu-imx5.c +++ b/arch/arm/mach-imx/cpu-imx5.c @@ -16,6 +16,8 @@ #include <linux/init.h> #include <linux/module.h> #include <linux/io.h> +#include <linux/of.h> +#include <linux/of_address.h> #include "hardware.h" #include "common.h" @@ -24,10 +26,26 @@ static int mx5_cpu_rev = -1; #define IIM_SREV 0x24 +static u32 imx5_read_srev_reg(const char *compat) +{ + void __iomem *iim_base; + struct device_node *np; + u32 srev; + + np = of_find_compatible_node(NULL, NULL, compat); + iim_base = of_iomap(np, 0); + WARN_ON(!iim_base); + + srev = readl(iim_base + IIM_SREV) & 0xff; + + iounmap(iim_base); + + return srev; +} + static int get_mx51_srev(void) { - void __iomem *iim_base = MX51_IO_ADDRESS(MX51_IIM_BASE_ADDR); - u32 rev = readl(iim_base + IIM_SREV) & 0xff; + u32 rev = imx5_read_srev_reg("fsl,imx51-iim"); switch (rev) { case 0x0: @@ -77,8 +95,7 @@ int __init mx51_neon_fixup(void) static int get_mx53_srev(void) { - void __iomem *iim_base = MX51_IO_ADDRESS(MX53_IIM_BASE_ADDR); - u32 rev = readl(iim_base + IIM_SREV) & 0xff; + u32 rev = imx5_read_srev_reg("fsl,imx53-iim"); switch (rev) { case 0x0: |