From 256311b71098adf36d9cd021f0314d54d16658e2 Mon Sep 17 00:00:00 2001
From: Icenowy Zheng <icenowy@aosc.io>
Date: Tue, 10 Sep 2019 12:03:32 +0800
Subject: [PATCH 277/463] iio: adc: axp20x_adc: allow to set TS pin to GPADC
 mode

The TS pin of AXP PMICs can be set to GPADC mode. In this situation, it
doesn't affect battery charging.

Add the code to do the mode setting.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
---
 drivers/iio/adc/axp20x_adc.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/iio/adc/axp20x_adc.c b/drivers/iio/adc/axp20x_adc.c
index b487e577befb3..05936931ff461 100644
--- a/drivers/iio/adc/axp20x_adc.c
+++ b/drivers/iio/adc/axp20x_adc.c
@@ -48,6 +48,7 @@
 #define AXP813_TS_GPIO0_ADC_RATE_HZ(x)		AXP20X_ADC_RATE_HZ(x)
 #define AXP813_V_I_ADC_RATE_HZ(x)		((ilog2((x) / 100) << 4) & AXP813_V_I_ADC_RATE_MASK)
 #define AXP813_ADC_RATE_HZ(x)			(AXP20X_ADC_RATE_HZ(x) | AXP813_V_I_ADC_RATE_HZ(x))
+#define AXP20X_TS_FUNCTION_GPADC		BIT(2)
 
 #define AXP20X_ADC_CHANNEL(_channel, _name, _type, _reg)	\
 	{							\
@@ -994,6 +995,11 @@ static int axp20x_probe(struct platform_device *pdev)
 		regmap_set_bits(info->regmap, AXP20X_ADC_EN2,
 				info->data->adc_en2_mask);
 
+	if (of_property_read_bool(pdev->dev.of_node, "x-powers,ts-as-gpadc"))
+		regmap_update_bits(info->regmap, AXP20X_ADC_RATE,
+				   AXP20X_TS_FUNCTION_GPADC,
+				   AXP20X_TS_FUNCTION_GPADC);
+
 	/* Configure ADCs rate */
 	info->data->adc_rate(info, 100);
 
-- 
2.46.0

