diff options
| author | Linus Walleij <linus.walleij@linaro.org> | 2016-09-01 11:44:45 +0200 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2016-09-18 11:32:49 +0100 |
| commit | 11adc2b218028934540be4f235a486d575d74b54 (patch) | |
| tree | ac32e8dd42d641d7aab0c247b31d3f187a30f355 /drivers/iio | |
| parent | 0427a106a98adf94b53cc88607ceabc2ecebd2cc (diff) | |
| download | op-kernel-dev-11adc2b218028934540be4f235a486d575d74b54.zip op-kernel-dev-11adc2b218028934540be4f235a486d575d74b54.tar.gz | |
iio: accel: kxsd9: Deploy proper register bit defines
There are some hardcoded register values etc in the code, define
proper bitfield definitions, and use them when getting and setting
the scale. Optimize a read/modify/write to use regmap_update_bits()
at the same time.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/accel/kxsd9.c | 36 |
1 files changed, 27 insertions, 9 deletions
diff --git a/drivers/iio/accel/kxsd9.c b/drivers/iio/accel/kxsd9.c index d84413a..8c6a455 100644 --- a/drivers/iio/accel/kxsd9.c +++ b/drivers/iio/accel/kxsd9.c @@ -20,6 +20,7 @@ #include <linux/slab.h> #include <linux/module.h> #include <linux/regmap.h> +#include <linux/bitops.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #include <linux/iio/buffer.h> @@ -35,9 +36,29 @@ #define KXSD9_REG_RESET 0x0a #define KXSD9_REG_CTRL_C 0x0c -#define KXSD9_FS_MASK 0x03 +#define KXSD9_CTRL_C_FS_MASK 0x03 +#define KXSD9_CTRL_C_FS_8G 0x00 +#define KXSD9_CTRL_C_FS_6G 0x01 +#define KXSD9_CTRL_C_FS_4G 0x02 +#define KXSD9_CTRL_C_FS_2G 0x03 +#define KXSD9_CTRL_C_MOT_LAT BIT(3) +#define KXSD9_CTRL_C_MOT_LEV BIT(4) +#define KXSD9_CTRL_C_LP_MASK 0xe0 +#define KXSD9_CTRL_C_LP_NONE 0x00 +#define KXSD9_CTRL_C_LP_2000HZC BIT(5) +#define KXSD9_CTRL_C_LP_2000HZB BIT(6) +#define KXSD9_CTRL_C_LP_2000HZA (BIT(5)|BIT(6)) +#define KXSD9_CTRL_C_LP_1000HZ BIT(7) +#define KXSD9_CTRL_C_LP_500HZ (BIT(7)|BIT(5)) +#define KXSD9_CTRL_C_LP_100HZ (BIT(7)|BIT(6)) +#define KXSD9_CTRL_C_LP_50HZ (BIT(7)|BIT(6)|BIT(5)) #define KXSD9_REG_CTRL_B 0x0d + +#define KXSD9_CTRL_B_CLK_HLD BIT(7) +#define KXSD9_CTRL_B_ENABLE BIT(6) +#define KXSD9_CTRL_B_ST BIT(5) /* Self-test */ + #define KXSD9_REG_CTRL_A 0x0e /** @@ -65,7 +86,6 @@ static int kxsd9_write_scale(struct iio_dev *indio_dev, int micro) int ret, i; struct kxsd9_state *st = iio_priv(indio_dev); bool foundit = false; - unsigned int val; for (i = 0; i < 4; i++) if (micro == kxsd9_micro_scales[i]) { @@ -75,14 +95,12 @@ static int kxsd9_write_scale(struct iio_dev *indio_dev, int micro) if (!foundit) return -EINVAL; - ret = regmap_read(st->map, - KXSD9_REG_CTRL_C, - &val); + ret = regmap_update_bits(st->map, + KXSD9_REG_CTRL_C, + KXSD9_CTRL_C_FS_MASK, + i); if (ret < 0) goto error_ret; - ret = regmap_write(st->map, - KXSD9_REG_CTRL_C, - (val & ~KXSD9_FS_MASK) | i); error_ret: return ret; } @@ -150,7 +168,7 @@ static int kxsd9_read_raw(struct iio_dev *indio_dev, if (ret < 0) goto error_ret; *val = 0; - *val2 = kxsd9_micro_scales[regval & KXSD9_FS_MASK]; + *val2 = kxsd9_micro_scales[regval & KXSD9_CTRL_C_FS_MASK]; ret = IIO_VAL_INT_PLUS_MICRO; break; } |
