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

[Yangtao Li]

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.win...@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