diff options
Diffstat (limited to 'drivers/iio/light/si1133.c')
| -rw-r--r-- | drivers/iio/light/si1133.c | 18 |
1 files changed, 6 insertions, 12 deletions
diff --git a/drivers/iio/light/si1133.c b/drivers/iio/light/si1133.c index 9174ab928880..c1adab2a50fd 100644 --- a/drivers/iio/light/si1133.c +++ b/drivers/iio/light/si1133.c @@ -17,6 +17,8 @@ #include <linux/util_macros.h> +#include <asm/unaligned.h> + #define SI1133_REG_PART_ID 0x00 #define SI1133_REG_REV_ID 0x01 #define SI1133_REG_MFR_ID 0x02 @@ -104,8 +106,6 @@ #define SI1133_LUX_BUFFER_SIZE 9 #define SI1133_MEASURE_BUFFER_SIZE 3 -#define SI1133_SIGN_BIT_INDEX 23 - static const int si1133_scale_available[] = { 1, 2, 4, 8, 16, 32, 64, 128}; @@ -633,8 +633,7 @@ static int si1133_measure(struct si1133_data *data, if (err) return err; - *val = sign_extend32((buffer[0] << 16) | (buffer[1] << 8) | buffer[2], - SI1133_SIGN_BIT_INDEX); + *val = sign_extend32(get_unaligned_be24(&buffer[0]), 23); return err; } @@ -723,16 +722,11 @@ static int si1133_get_lux(struct si1133_data *data, int *val) if (err) return err; - high_vis = - sign_extend32((buffer[0] << 16) | (buffer[1] << 8) | buffer[2], - SI1133_SIGN_BIT_INDEX); + high_vis = sign_extend32(get_unaligned_be24(&buffer[0]), 23); - low_vis = - sign_extend32((buffer[3] << 16) | (buffer[4] << 8) | buffer[5], - SI1133_SIGN_BIT_INDEX); + low_vis = sign_extend32(get_unaligned_be24(&buffer[3]), 23); - ir = sign_extend32((buffer[6] << 16) | (buffer[7] << 8) | buffer[8], - SI1133_SIGN_BIT_INDEX); + ir = sign_extend32(get_unaligned_be24(&buffer[6]), 23); if (high_vis > SI1133_ADC_THRESHOLD || ir > SI1133_ADC_THRESHOLD) lux = si1133_calc_polynomial(high_vis, ir, |