diff options
| author | Rasmus Villemoes <linux@rasmusvillemoes.dk> | 2023-03-06 10:43:01 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2023-03-12 15:47:57 +0000 |
| commit | 504eb485589d146e99a53cd982b52fe1728fc19e (patch) | |
| tree | 383dcc0df4028078d62ff7b5f08855fcf2b41056 | |
| parent | 954ea91fb68b771dba6d87cfa61b68e09cc2497f (diff) | |
| download | iio-504eb485589d146e99a53cd982b52fe1728fc19e.tar.gz | |
iio: ad74413r: wire up support for drive-strength-microamp property
Use the value specified in the channel configuration node to populate
the DIN_SINK field of the DIN_CONFIGx register.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Link: https://lore.kernel.org/r/20230306094301.1357543-3-linux@rasmusvillemoes.dk
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
| -rw-r--r-- | drivers/iio/addac/ad74413r.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/iio/addac/ad74413r.c b/drivers/iio/addac/ad74413r.c index f32c8c2fb26d2..4395758dbaa60 100644 --- a/drivers/iio/addac/ad74413r.c +++ b/drivers/iio/addac/ad74413r.c @@ -39,6 +39,7 @@ struct ad74413r_chip_info { struct ad74413r_channel_config { u32 func; + u32 drive_strength; bool gpo_comparator; bool initialized; }; @@ -111,6 +112,7 @@ struct ad74413r_state { #define AD74413R_REG_DIN_CONFIG_X(x) (0x09 + (x)) #define AD74413R_DIN_DEBOUNCE_MASK GENMASK(4, 0) #define AD74413R_DIN_DEBOUNCE_LEN BIT(5) +#define AD74413R_DIN_SINK_MASK GENMASK(9, 6) #define AD74413R_REG_DAC_CODE_X(x) (0x16 + (x)) #define AD74413R_DAC_CODE_MAX GENMASK(12, 0) @@ -261,6 +263,18 @@ static int ad74413r_set_comp_debounce(struct ad74413r_state *st, val); } +static int ad74413r_set_comp_drive_strength(struct ad74413r_state *st, + unsigned int offset, + unsigned int strength) +{ + strength = min(strength, 1800U); + + return regmap_update_bits(st->regmap, AD74413R_REG_DIN_CONFIG_X(offset), + AD74413R_DIN_SINK_MASK, + FIELD_PREP(AD74413R_DIN_SINK_MASK, strength / 120)); +} + + static void ad74413r_gpio_set(struct gpio_chip *chip, unsigned int offset, int val) { @@ -1190,6 +1204,9 @@ static int ad74413r_parse_channel_config(struct iio_dev *indio_dev, config->gpo_comparator = fwnode_property_read_bool(channel_node, "adi,gpo-comparator"); + fwnode_property_read_u32(channel_node, "drive-strength-microamp", + &config->drive_strength); + if (!config->gpo_comparator) st->num_gpo_gpios++; @@ -1269,6 +1286,7 @@ static int ad74413r_setup_gpios(struct ad74413r_state *st) unsigned int gpo_gpio_i = 0; unsigned int i; u8 gpo_config; + u32 strength; int ret; for (i = 0; i < AD74413R_CHANNEL_MAX; i++) { @@ -1285,6 +1303,11 @@ static int ad74413r_setup_gpios(struct ad74413r_state *st) config->func == CH_FUNC_DIGITAL_INPUT_LOOP_POWER) st->comp_gpio_offsets[comp_gpio_i++] = i; + strength = config->drive_strength; + ret = ad74413r_set_comp_drive_strength(st, i, strength); + if (ret) + return ret; + ret = ad74413r_set_gpo_config(st, i, gpo_config); if (ret) return ret; |