[PATCH v8 03/16] hwmon: Make use of devm_clk_get_enabled()

Uwe Kleine-König
2022-03-14T14:18:16Z

Several drivers manually register a devm handler to disable their clk.
Convert them to devm_clk_get_enabled().

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
drivers/hwmon/axi-fan-control.c | 15 +--------------
drivers/hwmon/ltc2947-core.c | 17 +----------------
drivers/hwmon/mr75203.c | 26 +-------------------------
drivers/hwmon/sparx5-temp.c | 19 +------------------
4 files changed, 4 insertions(+), 73 deletions(-)

diff --git a/drivers/hwmon/axi-fan-control.c b/drivers/hwmon/axi-fan-control.c
index d2092c17d993..ce404ed9c53e 100644
--- a/drivers/hwmon/axi-fan-control.c
+++ b/drivers/hwmon/axi-fan-control.c
@@ -393,11 +393,6 @@ static int axi_fan_control_init(struct axi_fan_control_data *ctl,
return ret;
}

-static void axi_fan_control_clk_disable(void *clk)
-{
- clk_disable_unprepare(clk);
-}
-
static const struct hwmon_channel_info *axi_fan_control_info[] = {
HWMON_CHANNEL_INFO(pwm, HWMON_PWM_INPUT),
HWMON_CHANNEL_INFO(fan, HWMON_F_INPUT | HWMON_F_FAULT | HWMON_F_LABEL),
@@ -477,20 +472,12 @@ static int axi_fan_control_probe(struct platform_device *pdev)
if (IS_ERR(ctl->base))
return PTR_ERR(ctl->base);

- clk = devm_clk_get(&pdev->dev, NULL);
+ clk = devm_clk_get_enabled(&pdev->dev, NULL);
if (IS_ERR(clk)) {
dev_err(&pdev->dev, "clk_get failed with %ld\n", PTR_ERR(clk));
return PTR_ERR(clk);
}

- ret = clk_prepare_enable(clk);
- if (ret)
- return ret;
-
- ret = devm_add_action_or_reset(&pdev->dev, axi_fan_control_clk_disable, clk);
- if (ret)
- return ret;
-
ctl->clk_rate = clk_get_rate(clk);
if (!ctl->clk_rate)
return -EINVAL;
diff --git a/drivers/hwmon/ltc2947-core.c b/drivers/hwmon/ltc2947-core.c
index 5423466de697..626f5bf2c9c7 100644
--- a/drivers/hwmon/ltc2947-core.c
+++ b/drivers/hwmon/ltc2947-core.c
@@ -956,13 +956,6 @@ static struct attribute *ltc2947_attrs[] = {
};
ATTRIBUTE_GROUPS(ltc2947);

-static void ltc2947_clk_disable(void *data)
-{
- struct clk *extclk = data;
-
- clk_disable_unprepare(extclk);
-}
-
static int ltc2947_setup(struct ltc2947_data *st)
{
int ret;
@@ -989,7 +982,7 @@ static int ltc2947_setup(struct ltc2947_data *st)
return ret;

/* check external clock presence */
- extclk = devm_clk_get_optional(st->dev, NULL);
+ extclk = devm_clk_get_optional_enabled(st->dev, NULL);
if (IS_ERR(extclk))
return dev_err_probe(st->dev, PTR_ERR(extclk),
"Failed to get external clock\n");
@@ -1007,14 +1000,6 @@ static int ltc2947_setup(struct ltc2947_data *st)
return -EINVAL;
}

- ret = clk_prepare_enable(extclk);
- if (ret)
- return ret;
-
- ret = devm_add_action_or_reset(st->dev, ltc2947_clk_disable,
- extclk);
- if (ret)
- return ret;
/* as in table 1 of the datasheet */
if (rate_hz >= LTC2947_CLK_MIN && rate_hz <= 1000000)
pre = 0;
diff --git a/drivers/hwmon/mr75203.c b/drivers/hwmon/mr75203.c
index 1ba1e3145969..0c691f291a64 100644
--- a/drivers/hwmon/mr75203.c
+++ b/drivers/hwmon/mr75203.c
@@ -461,24 +461,6 @@ static int pvt_get_regmap(struct platform_device *pdev, char *reg_name,
return 0;
}

-static void pvt_clk_disable(void *data)
-{
- struct pvt_device *pvt = data;
-
- clk_disable_unprepare(pvt->clk);
-}
-
-static int pvt_clk_enable(struct device *dev, struct pvt_device *pvt)
-{
- int ret;
-
- ret = clk_prepare_enable(pvt->clk);
- if (ret)
- return ret;
-
- return devm_add_action_or_reset(dev, pvt_clk_disable, pvt);
-}
-
static void pvt_reset_control_assert(void *data)
{
struct pvt_device *pvt = data;
@@ -515,16 +497,10 @@ static int mr75203_probe(struct platform_device *pdev)
if (ret)
return ret;

- pvt->clk = devm_clk_get(dev, NULL);
+ pvt->clk = devm_clk_get_enabled(dev, NULL);
if (IS_ERR(pvt->clk))
return dev_err_probe(dev, PTR_ERR(pvt->clk), "failed to get clock\n");

- ret = pvt_clk_enable(dev, pvt);
- if (ret) {
- dev_err(dev, "failed to enable clock\n");
- return ret;
- }
-
pvt->rst = devm_reset_control_get_exclusive(dev, NULL);
if (IS_ERR(pvt->rst))
return dev_err_probe(dev, PTR_ERR(pvt->rst),
diff --git a/drivers/hwmon/sparx5-temp.c b/drivers/hwmon/sparx5-temp.c
index 98be48e3a22a..04fd8505e5d6 100644
--- a/drivers/hwmon/sparx5-temp.c
+++ b/drivers/hwmon/sparx5-temp.c
@@ -26,13 +26,6 @@ struct s5_hwmon {
struct clk *clk;
};

-static void s5_temp_clk_disable(void *data)
-{
- struct clk *clk = data;
-
- clk_disable_unprepare(clk);
-}
-
static void s5_temp_enable(struct s5_hwmon *hwmon)
{
u32 val = readl(hwmon->base + TEMP_CFG);
@@ -113,7 +106,6 @@ static int s5_temp_probe(struct platform_device *pdev)
{
struct device *hwmon_dev;
struct s5_hwmon *hwmon;
- int ret;

hwmon = devm_kzalloc(&pdev->dev, sizeof(*hwmon), GFP_KERNEL);
if (!hwmon)
@@ -123,19 +115,10 @@ static int s5_temp_probe(struct platform_device *pdev)
if (IS_ERR(hwmon->base))
return PTR_ERR(hwmon->base);

- hwmon->clk = devm_clk_get(&pdev->dev, NULL);
+ hwmon->clk = devm_clk_get_enabled(&pdev->dev, NULL);
if (IS_ERR(hwmon->clk))
return PTR_ERR(hwmon->clk);

- ret = clk_prepare_enable(hwmon->clk);
- if (ret)
- return ret;
-
- ret = devm_add_action_or_reset(&pdev->dev, s5_temp_clk_disable,
- hwmon->clk);
- if (ret)
- return ret;
-
s5_temp_enable(hwmon);

hwmon_dev = devm_hwmon_device_register_with_info(&pdev->dev,
--
2.35.1