Add ability to set the precharge internal resistance from the device
tree.
Signed-off-by: Gwendal Grignou <gwendal@xxxxxxxxxxxx>
Reviewed-by: Stephen Boyd <swboyd@xxxxxxxxxxxx>
---
Changes since v4:
- Added missing tests when property is not found.
Changes since v3:
- Added Review tags.
Changes since v2:
- Change kOhms into ohms.
Changes since v1:
- Suffix field with kOhms unit.
drivers/iio/proximity/sx9360.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/proximity/sx9360.c b/drivers/iio/proximity/sx9360.c
index 3ebb30c8a4f61..d9a12e6be6ca6 100644
--- a/drivers/iio/proximity/sx9360.c
+++ b/drivers/iio/proximity/sx9360.c
@@ -51,6 +51,8 @@
#define SX9360_REG_GNRL_REG_2_FREQ(_r) (SX9360_FOSC_HZ / ((_r) * 8192))
#define SX9360_REG_AFE_CTRL1 0x21
+#define SX9360_REG_AFE_CTRL1_RESFILTIN_MASK GENMASK(3, 0)
+#define SX9360_REG_AFE_CTRL1_RESFILTIN_0OHMS 0
#define SX9360_REG_AFE_PARAM0_PHR 0x22
#define SX9360_REG_AFE_PARAM1_PHR 0x23
#define SX9360_REG_AFE_PARAM0_PHM 0x24
@@ -671,7 +673,7 @@ static const struct sx_common_reg_default sx9360_default_regs[] = {
{ SX9360_REG_GNRL_CTRL1, 0x00 },
{ SX9360_REG_GNRL_CTRL2, SX9360_REG_GNRL_CTRL2_PERIOD_102MS },
- { SX9360_REG_AFE_CTRL1, 0x00 },
+ { SX9360_REG_AFE_CTRL1, SX9360_REG_AFE_CTRL1_RESFILTIN_0OHMS },
{ SX9360_REG_AFE_PARAM0_PHR, SX9360_REG_AFE_PARAM0_RSVD |
SX9360_REG_AFE_PARAM0_RESOLUTION_128 },
{ SX9360_REG_AFE_PARAM1_PHR, SX9360_REG_AFE_PARAM1_AGAIN_PHM_6PF |
@@ -722,6 +724,17 @@ sx9360_get_default_reg(struct device *dev, int idx,
memcpy(reg_def, &sx9360_default_regs[idx], sizeof(*reg_def));
switch (reg_def->reg) {
+ case SX9360_REG_AFE_CTRL1:
+ ret = device_property_read_u32(dev,
+ "semtech,input-precharge-resistor-ohms",
+ &raw);
+ if (ret)
+ break;
+
+ reg_def->def &= ~SX9360_REG_AFE_CTRL1_RESFILTIN_MASK;
+ reg_def->def |= FIELD_PREP(SX9360_REG_AFE_CTRL1_RESFILTIN_MASK,
+ raw / 2000);
+ break;
case SX9360_REG_AFE_PARAM0_PHR:
case SX9360_REG_AFE_PARAM0_PHM:
ret = device_property_read_u32(dev, "semtech,resolution", &raw);
--
2.36.0.464.gb9c8b46e94-goog
