diff options
Diffstat (limited to 'drivers/iio/potentiometer/mcp4531.c')
| -rw-r--r-- | drivers/iio/potentiometer/mcp4531.c | 104 |
1 files changed, 62 insertions, 42 deletions
diff --git a/drivers/iio/potentiometer/mcp4531.c b/drivers/iio/potentiometer/mcp4531.c index 13b6ae2fcf7b..0d1bcf89ae17 100644 --- a/drivers/iio/potentiometer/mcp4531.c +++ b/drivers/iio/potentiometer/mcp4531.c @@ -38,7 +38,7 @@ struct mcp4531_cfg { int wipers; - int max_pos; + int avail[3]; int kohms; }; @@ -78,38 +78,38 @@ enum mcp4531_type { }; static const struct mcp4531_cfg mcp4531_cfg[] = { - [MCP453x_502] = { .wipers = 1, .max_pos = 128, .kohms = 5, }, - [MCP453x_103] = { .wipers = 1, .max_pos = 128, .kohms = 10, }, - [MCP453x_503] = { .wipers = 1, .max_pos = 128, .kohms = 50, }, - [MCP453x_104] = { .wipers = 1, .max_pos = 128, .kohms = 100, }, - [MCP454x_502] = { .wipers = 1, .max_pos = 128, .kohms = 5, }, - [MCP454x_103] = { .wipers = 1, .max_pos = 128, .kohms = 10, }, - [MCP454x_503] = { .wipers = 1, .max_pos = 128, .kohms = 50, }, - [MCP454x_104] = { .wipers = 1, .max_pos = 128, .kohms = 100, }, - [MCP455x_502] = { .wipers = 1, .max_pos = 256, .kohms = 5, }, - [MCP455x_103] = { .wipers = 1, .max_pos = 256, .kohms = 10, }, - [MCP455x_503] = { .wipers = 1, .max_pos = 256, .kohms = 50, }, - [MCP455x_104] = { .wipers = 1, .max_pos = 256, .kohms = 100, }, - [MCP456x_502] = { .wipers = 1, .max_pos = 256, .kohms = 5, }, - [MCP456x_103] = { .wipers = 1, .max_pos = 256, .kohms = 10, }, - [MCP456x_503] = { .wipers = 1, .max_pos = 256, .kohms = 50, }, - [MCP456x_104] = { .wipers = 1, .max_pos = 256, .kohms = 100, }, - [MCP463x_502] = { .wipers = 2, .max_pos = 128, .kohms = 5, }, - [MCP463x_103] = { .wipers = 2, .max_pos = 128, .kohms = 10, }, - [MCP463x_503] = { .wipers = 2, .max_pos = 128, .kohms = 50, }, - [MCP463x_104] = { .wipers = 2, .max_pos = 128, .kohms = 100, }, - [MCP464x_502] = { .wipers = 2, .max_pos = 128, .kohms = 5, }, - [MCP464x_103] = { .wipers = 2, .max_pos = 128, .kohms = 10, }, - [MCP464x_503] = { .wipers = 2, .max_pos = 128, .kohms = 50, }, - [MCP464x_104] = { .wipers = 2, .max_pos = 128, .kohms = 100, }, - [MCP465x_502] = { .wipers = 2, .max_pos = 256, .kohms = 5, }, - [MCP465x_103] = { .wipers = 2, .max_pos = 256, .kohms = 10, }, - [MCP465x_503] = { .wipers = 2, .max_pos = 256, .kohms = 50, }, - [MCP465x_104] = { .wipers = 2, .max_pos = 256, .kohms = 100, }, - [MCP466x_502] = { .wipers = 2, .max_pos = 256, .kohms = 5, }, - [MCP466x_103] = { .wipers = 2, .max_pos = 256, .kohms = 10, }, - [MCP466x_503] = { .wipers = 2, .max_pos = 256, .kohms = 50, }, - [MCP466x_104] = { .wipers = 2, .max_pos = 256, .kohms = 100, }, + [MCP453x_502] = { .wipers = 1, .avail = { 0, 1, 128 }, .kohms = 5, }, + [MCP453x_103] = { .wipers = 1, .avail = { 0, 1, 128 }, .kohms = 10, }, + [MCP453x_503] = { .wipers = 1, .avail = { 0, 1, 128 }, .kohms = 50, }, + [MCP453x_104] = { .wipers = 1, .avail = { 0, 1, 128 }, .kohms = 100, }, + [MCP454x_502] = { .wipers = 1, .avail = { 0, 1, 128 }, .kohms = 5, }, + [MCP454x_103] = { .wipers = 1, .avail = { 0, 1, 128 }, .kohms = 10, }, + [MCP454x_503] = { .wipers = 1, .avail = { 0, 1, 128 }, .kohms = 50, }, + [MCP454x_104] = { .wipers = 1, .avail = { 0, 1, 128 }, .kohms = 100, }, + [MCP455x_502] = { .wipers = 1, .avail = { 0, 1, 256 }, .kohms = 5, }, + [MCP455x_103] = { .wipers = 1, .avail = { 0, 1, 256 }, .kohms = 10, }, + [MCP455x_503] = { .wipers = 1, .avail = { 0, 1, 256 }, .kohms = 50, }, + [MCP455x_104] = { .wipers = 1, .avail = { 0, 1, 256 }, .kohms = 100, }, + [MCP456x_502] = { .wipers = 1, .avail = { 0, 1, 256 }, .kohms = 5, }, + [MCP456x_103] = { .wipers = 1, .avail = { 0, 1, 256 }, .kohms = 10, }, + [MCP456x_503] = { .wipers = 1, .avail = { 0, 1, 256 }, .kohms = 50, }, + [MCP456x_104] = { .wipers = 1, .avail = { 0, 1, 256 }, .kohms = 100, }, + [MCP463x_502] = { .wipers = 2, .avail = { 0, 1, 128 }, .kohms = 5, }, + [MCP463x_103] = { .wipers = 2, .avail = { 0, 1, 128 }, .kohms = 10, }, + [MCP463x_503] = { .wipers = 2, .avail = { 0, 1, 128 }, .kohms = 50, }, + [MCP463x_104] = { .wipers = 2, .avail = { 0, 1, 128 }, .kohms = 100, }, + [MCP464x_502] = { .wipers = 2, .avail = { 0, 1, 128 }, .kohms = 5, }, + [MCP464x_103] = { .wipers = 2, .avail = { 0, 1, 128 }, .kohms = 10, }, + [MCP464x_503] = { .wipers = 2, .avail = { 0, 1, 128 }, .kohms = 50, }, + [MCP464x_104] = { .wipers = 2, .avail = { 0, 1, 128 }, .kohms = 100, }, + [MCP465x_502] = { .wipers = 2, .avail = { 0, 1, 256 }, .kohms = 5, }, + [MCP465x_103] = { .wipers = 2, .avail = { 0, 1, 256 }, .kohms = 10, }, + [MCP465x_503] = { .wipers = 2, .avail = { 0, 1, 256 }, .kohms = 50, }, + [MCP465x_104] = { .wipers = 2, .avail = { 0, 1, 256 }, .kohms = 100, }, + [MCP466x_502] = { .wipers = 2, .avail = { 0, 1, 256 }, .kohms = 5, }, + [MCP466x_103] = { .wipers = 2, .avail = { 0, 1, 256 }, .kohms = 10, }, + [MCP466x_503] = { .wipers = 2, .avail = { 0, 1, 256 }, .kohms = 50, }, + [MCP466x_104] = { .wipers = 2, .avail = { 0, 1, 256 }, .kohms = 100, }, }; #define MCP4531_WRITE (0 << 2) @@ -124,13 +124,14 @@ struct mcp4531_data { const struct mcp4531_cfg *cfg; }; -#define MCP4531_CHANNEL(ch) { \ - .type = IIO_RESISTANCE, \ - .indexed = 1, \ - .output = 1, \ - .channel = (ch), \ - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ - .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ +#define MCP4531_CHANNEL(ch) { \ + .type = IIO_RESISTANCE, \ + .indexed = 1, \ + .output = 1, \ + .channel = (ch), \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ + .info_mask_shared_by_type_available = BIT(IIO_CHAN_INFO_RAW), \ } static const struct iio_chan_spec mcp4531_channels[] = { @@ -156,13 +157,31 @@ static int mcp4531_read_raw(struct iio_dev *indio_dev, return IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: *val = 1000 * data->cfg->kohms; - *val2 = data->cfg->max_pos; + *val2 = data->cfg->avail[2]; return IIO_VAL_FRACTIONAL; } return -EINVAL; } +static int mcp4531_read_avail(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + const int **vals, int *type, int *length, + long mask) +{ + struct mcp4531_data *data = iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_RAW: + *length = ARRAY_SIZE(data->cfg->avail); + *vals = data->cfg->avail; + *type = IIO_VAL_INT; + return IIO_AVAIL_RANGE; + } + + return -EINVAL; +} + static int mcp4531_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) @@ -172,7 +191,7 @@ static int mcp4531_write_raw(struct iio_dev *indio_dev, switch (mask) { case IIO_CHAN_INFO_RAW: - if (val > data->cfg->max_pos || val < 0) + if (val > data->cfg->avail[2] || val < 0) return -EINVAL; break; default: @@ -186,6 +205,7 @@ static int mcp4531_write_raw(struct iio_dev *indio_dev, static const struct iio_info mcp4531_info = { .read_raw = mcp4531_read_raw, + .read_avail = mcp4531_read_avail, .write_raw = mcp4531_write_raw, .driver_module = THIS_MODULE, }; |