[PATCH v4 08/11] thermal: sun8i: support ahb clocks

Yangtao Li
2019-06-23T16:42:34Z

H3 has extra clock, so introduce something in ths_thermal_chip/ths_device
and adds the process of the clock.

This is pre-work for supprt it.

Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
---
drivers/thermal/sun8i_thermal.c | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/thermal/sun8i_thermal.c b/drivers/thermal/sun8i_thermal.c
index ed1c19bb27cf..04f53ffb6a14 100644
--- a/drivers/thermal/sun8i_thermal.c
+++ b/drivers/thermal/sun8i_thermal.c
@@ -54,6 +54,7 @@ struct tsensor {
};

struct ths_thermal_chip {
+ bool has_ahb_clk;
int sensor_num;
int offset;
int scale;
@@ -69,6 +70,7 @@ struct ths_device {
struct regmap *regmap;
struct reset_control *reset;
struct clk *bus_clk;
+ struct clk *ahb_clk;
struct tsensor sensor[MAX_SENSOR_NUM];
};

@@ -280,6 +282,12 @@ static int sun8i_ths_resource_init(struct ths_device *tmdev)
if (IS_ERR(tmdev->bus_clk))
return PTR_ERR(tmdev->bus_clk);

+ if (tmdev->chip->has_ahb_clk) {
+ tmdev->ahb_clk = devm_clk_get(&pdev->dev, "ahb");
+ if (IS_ERR(tmdev->ahb_clk))
+ return PTR_ERR(tmdev->ahb_clk);
+ }
+
ret = reset_control_deassert(tmdev->reset);
if (ret)
return ret;
@@ -288,12 +296,18 @@ static int sun8i_ths_resource_init(struct ths_device *tmdev)
if (ret)
goto assert_reset;

- ret = sun50i_ths_calibrate(tmdev);
+ ret = clk_prepare_enable(tmdev->ahb_clk);
if (ret)
goto bus_disable;

+ ret = sun50i_ths_calibrate(tmdev);
+ if (ret)
+ goto ahb_disable;
+
return 0;

+ahb_disable:
+ clk_disable_unprepare(tmdev->ahb_clk);
bus_disable:
clk_disable_unprepare(tmdev->bus_clk);
assert_reset:
@@ -401,6 +415,7 @@ static int sun8i_ths_remove(struct platform_device *pdev)
{
struct ths_device *tmdev = platform_get_drvdata(pdev);

+ clk_disable_unprepare(tmdev->ahb_clk);
clk_disable_unprepare(tmdev->bus_clk);
reset_control_assert(tmdev->reset);

--
2.17.1