[PATCH 1/6] thermal/drivers/sun8i: add gpadc clock

[iuncuim <iuncuim@gmail.com>]

From: Mikhail Kalashnikov <iuncuim@gmail.com>

Some processors (e.g. Allwinner A523) require GPADC clocking activation for
temperature sensors to work. So let's add support for enabling it.

Signed-off-by: Mikhail Kalashnikov <iuncuim@gmail.com>
---
 drivers/thermal/sun8i_thermal.c | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/drivers/thermal/sun8i_thermal.c b/drivers/thermal/sun8i_thermal.c
index 226747906..1f3908a60 100644
--- a/drivers/thermal/sun8i_thermal.c
+++ b/drivers/thermal/sun8i_thermal.c
@@ -66,8 +66,9 @@ struct tsensor {
 };
 
 struct ths_thermal_chip {
-	bool            has_mod_clk;
-	bool            has_bus_clk_reset;
+	bool		has_gpadc_clk;
+	bool		has_mod_clk;
+	bool		has_bus_clk_reset;
 	bool		needs_sram;
 	int		sensor_num;
 	int		offset;
@@ -89,7 +90,8 @@ struct ths_device {
 	struct regmap_field			*sram_regmap_field;
 	struct reset_control			*reset;
 	struct clk				*bus_clk;
-	struct clk                              *mod_clk;
+	struct clk				*mod_clk;
+	struct clk				*gpadc_clk;
 	struct tsensor				sensor[MAX_SENSOR_NUM];
 };
 
@@ -417,6 +419,16 @@ static int sun8i_ths_resource_init(struct ths_device *tmdev)
 	if (ret)
 		return ret;
 
+	if (tmdev->chip->has_gpadc_clk) {
+		tmdev->gpadc_clk = devm_clk_get_enabled(&pdev->dev, "gpadc");
+		if (IS_ERR(tmdev->gpadc_clk))
+			return PTR_ERR(tmdev->gpadc_clk);
+	}
+
+	ret = clk_prepare_enable(tmdev->gpadc_clk);
+	if (ret)
+		return ret;
+
 	if (tmdev->chip->needs_sram) {
 		struct regmap *regmap;
 
-- 
2.49.0