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iio: ad74413r: wire up support for drive-strength-microamp property

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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>
This commit is contained in:
Rasmus Villemoes 2023-03-06 10:43:01 +01:00 committed by Jonathan Cameron
parent 954ea91fb6
commit 504eb48558
1 changed files with 23 additions and 0 deletions
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23
drivers/iio/addac/ad74413r.c
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@ -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;