[PATCH v3 6/8] iio: sx9324: Add Setting for internal compensation resistor

[Gwendal Grignou <gwendal@xxxxxxxxxxxx>]

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

Signed-off-by: Gwendal Grignou <gwendal@xxxxxxxxxxxx>
---
Changes since v2:
- No changes.

Changes since v1:
- No changes.

 drivers/iio/proximity/sx9324.c | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/proximity/sx9324.c b/drivers/iio/proximity/sx9324.c
index 3f229dffd5380..38dfdc6dc86ad 100644
--- a/drivers/iio/proximity/sx9324.c
+++ b/drivers/iio/proximity/sx9324.c
@@ -52,6 +52,11 @@
 #define SX9324_REG_CLK_SPRD		0x15
 
 #define SX9324_REG_AFE_CTRL0		0x20
+#define SX9324_REG_AFE_CTRL0_RINT_MASK GENMASK(7, 6)
+#define SX9324_REG_AFE_CTRL0_RINT_LOWEST	0x00
+#define SX9324_REG_AFE_CTRL0_RINT_LOW		0x40
+#define SX9324_REG_AFE_CTRL0_RINT_HIGH		0x80
+#define SX9324_REG_AFE_CTRL0_RINT_HIGHEST	0xc0
 #define SX9324_REG_AFE_CTRL1		0x21
 #define SX9324_REG_AFE_CTRL2		0x22
 #define SX9324_REG_AFE_CTRL3		0x23
@@ -769,7 +774,7 @@ 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 },
@@ -855,6 +860,7 @@ 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) {
@@ -875,6 +881,22 @@ 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;
+		reg_def->def &= ~SX9324_REG_AFE_CTRL0_RINT_MASK;
+		if (!strcmp(res, "lowest"))
+			reg_def->def |= SX9324_REG_AFE_CTRL0_RINT_LOWEST;
+		else if (!strcmp(res, "low"))
+			reg_def->def |= SX9324_REG_AFE_CTRL0_RINT_LOW;
+		else if (!strcmp(res, "high"))
+			reg_def->def |= SX9324_REG_AFE_CTRL0_RINT_HIGH;
+		else if (!strcmp(res, "highest"))
+			reg_def->def |= SX9324_REG_AFE_CTRL0_RINT_HIGHEST;
+
+		break;
 	case SX9324_REG_AFE_CTRL4:
 	case SX9324_REG_AFE_CTRL7:
 		if (reg_def->reg == SX9324_REG_AFE_CTRL4)
-- 
2.35.1.1021.g381101b075-goog