Add ability to set the precharge internal resistance from the device
tree.
Signed-off-by: Gwendal Grignou <gwendal@xxxxxxxxxxxx>
---
drivers/iio/proximity/sx9324.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/iio/proximity/sx9324.c b/drivers/iio/proximity/sx9324.c
index 1bef16437aa84..785af857b23a1 100644
--- a/drivers/iio/proximity/sx9324.c
+++ b/drivers/iio/proximity/sx9324.c
@@ -70,7 +70,8 @@
#define SX9324_REG_AFE_PH2 0x2a
#define SX9324_REG_AFE_PH3 0x2b
#define SX9324_REG_AFE_CTRL8 0x2c
-#define SX9324_REG_AFE_CTRL8_RESFILTN_4KOHM 0x02
+#define SX9324_REG_AFE_CTRL8_RESFILTIN_4KOHM 0x02
+#define SX9324_REG_AFE_CTRL8_RESFILTIN_MASK GENMASK(3, 0)
#define SX9324_REG_AFE_CTRL9 0x2d
#define SX9324_REG_AFE_CTRL9_AGAIN_1 0x08
@@ -781,7 +782,7 @@ static const struct sx_common_reg_default sx9324_default_regs[] = {
{ SX9324_REG_AFE_PH2, 0x1a },
{ SX9324_REG_AFE_PH3, 0x16 },
- { SX9324_REG_AFE_CTRL8, SX9324_REG_AFE_CTRL8_RESFILTN_4KOHM },
+ { SX9324_REG_AFE_CTRL8, 0x10 | SX9324_REG_AFE_CTRL8_RESFILTIN_4KOHM },
{ SX9324_REG_AFE_CTRL9, SX9324_REG_AFE_CTRL9_AGAIN_1 },
{ SX9324_REG_PROX_CTRL0, SX9324_REG_PROX_CTRL0_GAIN_1 |
@@ -891,6 +892,15 @@ sx9324_get_default_reg(struct device *dev, int idx,
reg_def->def |= FIELD_PREP(SX9324_REG_AFE_CTRL4_RESOLUTION_MASK,
raw);
break;
+ case SX9324_REG_AFE_CTRL8:
+ ret = device_property_read_u32(dev,
+ "semtech,input-precharge-resistor",
+ &raw);
+ reg_def->def &= ~SX9324_REG_AFE_CTRL8_RESFILTIN_MASK;
+ reg_def->def |= FIELD_PREP(SX9324_REG_AFE_CTRL8_RESFILTIN_MASK,
+ raw / 2);
+ break;
+
case SX9324_REG_ADV_CTRL5:
ret = device_property_read_u32(dev, "semtech,startup-sensor",
&start);
--
2.35.1.723.g4982287a31-goog
