diff options
Diffstat (limited to 'include/linux/soc/ixp4xx/cpu.h')
| -rw-r--r-- | include/linux/soc/ixp4xx/cpu.h | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/include/linux/soc/ixp4xx/cpu.h b/include/linux/soc/ixp4xx/cpu.h index 88bd8de0e803..f526ac33afea 100644 --- a/include/linux/soc/ixp4xx/cpu.h +++ b/include/linux/soc/ixp4xx/cpu.h @@ -9,6 +9,7 @@ #define __SOC_IXP4XX_CPU_H__ #include <linux/io.h> +#include <linux/regmap.h> #ifdef CONFIG_ARM #include <asm/cputype.h> #endif @@ -23,6 +24,9 @@ #define IXP46X_PROCESSOR_ID_VALUE 0x69054200 /* including IXP455 */ #define IXP46X_PROCESSOR_ID_MASK 0xfffffff0 +/* Feature register in the expansion bus controller */ +#define IXP4XX_EXP_CNFG2 0x2c + /* "fuse" bits of IXP_EXP_CFG2 */ /* All IXP4xx CPUs */ #define IXP4XX_FEATURE_RCOMP (1 << 0) @@ -86,21 +90,31 @@ IXP43X_PROCESSOR_ID_VALUE) #define cpu_is_ixp46x() ((read_cpuid_id() & IXP46X_PROCESSOR_ID_MASK) == \ IXP46X_PROCESSOR_ID_VALUE) +static inline u32 cpu_ixp4xx_features(struct regmap *rmap) +{ + u32 val; -u32 ixp4xx_read_feature_bits(void); -void ixp4xx_write_feature_bits(u32 value); + regmap_read(rmap, IXP4XX_EXP_CNFG2, &val); + /* For some reason this register is inverted */ + val = ~val; + if (cpu_is_ixp42x_rev_a0()) + return IXP42X_FEATURE_MASK & ~(IXP4XX_FEATURE_RCOMP | + IXP4XX_FEATURE_AES); + if (cpu_is_ixp42x()) + return val & IXP42X_FEATURE_MASK; + if (cpu_is_ixp43x()) + return val & IXP43X_FEATURE_MASK; + return val & IXP46X_FEATURE_MASK; +} #else #define cpu_is_ixp42x_rev_a0() 0 #define cpu_is_ixp42x() 0 #define cpu_is_ixp43x() 0 #define cpu_is_ixp46x() 0 -static inline u32 ixp4xx_read_feature_bits(void) +static inline u32 cpu_ixp4xx_features(struct regmap *rmap) { return 0; } -static inline void ixp4xx_write_feature_bits(u32 value) -{ -} #endif #endif /* _ASM_ARCH_CPU_H */ |