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iio: sx9324: Add Setting for internal compensation resistor

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Based on device tree setting, set the internal compensation resistor.

Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20220429220144.1476049-7-gwendal@chromium.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Gwendal Grignou 2022-04-29 15:01:40 -07:00 committed by Jonathan Cameron
parent f337f41f5d
commit 841a329b5f
1 changed files with 20 additions and 1 deletions
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21
drivers/iio/proximity/sx9324.c
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@ -52,6 +52,11 @@
#define SX9324_REG_CLK_SPRD 0x15
#define SX9324_REG_AFE_CTRL0 0x20
#define SX9324_REG_AFE_CTRL0_RINT_SHIFT 6
#define SX9324_REG_AFE_CTRL0_RINT_MASK \
GENMASK(SX9324_REG_AFE_CTRL0_RINT_SHIFT + 1, \
SX9324_REG_AFE_CTRL0_RINT_SHIFT)
#define SX9324_REG_AFE_CTRL0_RINT_LOWEST 0x00
#define SX9324_REG_AFE_CTRL1 0x21
#define SX9324_REG_AFE_CTRL2 0x22
#define SX9324_REG_AFE_CTRL3 0x23
@ -783,7 +788,7 @@ static const struct sx_common_reg_default sx9324_default_regs[] = {
*/
{ SX9324_REG_GNRL_CTRL1, SX9324_REG_GNRL_CTRL1_PAUSECTRL },
{ SX9324_REG_AFE_CTRL0, 0x00 },
{ SX9324_REG_AFE_CTRL0, SX9324_REG_AFE_CTRL0_RINT_LOWEST },
{ SX9324_REG_AFE_CTRL3, 0x00 },
{ SX9324_REG_AFE_CTRL4, SX9324_REG_AFE_CTRL4_FREQ_83_33HZ |
SX9324_REG_AFE_CTRL4_RES_100 },
@ -864,6 +869,8 @@ static const struct sx_common_reg_default *
sx9324_get_default_reg(struct device *dev, int idx,
struct sx_common_reg_default *reg_def)
{
static const char * const sx9324_rints[] = { "lowest", "low", "high",
"highest" };
#define SX9324_PIN_DEF "semtech,ph0-pin"
#define SX9324_RESOLUTION_DEF "semtech,ph01-resolution"
#define SX9324_PROXRAW_DEF "semtech,ph01-proxraw-strength"
@ -871,6 +878,7 @@ sx9324_get_default_reg(struct device *dev, int idx,
char prop[] = SX9324_PROXRAW_DEF;
u32 start = 0, raw = 0, pos = 0;
int ret, count, ph, pin;
const char *res;
memcpy(reg_def, &sx9324_default_regs[idx], sizeof(*reg_def));
switch (reg_def->reg) {
@ -891,6 +899,17 @@ sx9324_get_default_reg(struct device *dev, int idx,
SX9324_REG_AFE_PH0_PIN_MASK(pin);
reg_def->def = raw;
break;
case SX9324_REG_AFE_CTRL0:
ret = device_property_read_string(dev,
"semtech,int-comp-resistor", &res);
if (ret)
break;
ret = match_string(sx9324_rints, ARRAY_SIZE(sx9324_rints), res);
if (ret < 0)
break;
reg_def->def &= ~SX9324_REG_AFE_CTRL0_RINT_MASK;
reg_def->def |= ret << SX9324_REG_AFE_CTRL0_RINT_SHIFT;
break;
case SX9324_REG_AFE_CTRL4:
case SX9324_REG_AFE_CTRL7:
if (reg_def->reg == SX9324_REG_AFE_CTRL4)