[RFC PATCH 1/6] hwmon: axi-fan-control: make sure the clock is enabled

["Nuno Sá" <nuno.sa@analog.com>]

The core will only work if it's clock is enabled. This patch is a
minor enhancement to make sure that's the case.

Signed-off-by: Nuno Sá <nuno.sa@analog.com>
---
 drivers/hwmon/axi-fan-control.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/hwmon/axi-fan-control.c b/drivers/hwmon/axi-fan-control.c
index e3f6b03e6764..901d1588234d 100644
--- a/drivers/hwmon/axi-fan-control.c
+++ b/drivers/hwmon/axi-fan-control.c
@@ -351,6 +351,11 @@ 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),
@@ -406,6 +411,14 @@ static int axi_fan_control_probe(struct platform_device *pdev)
 		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;
-- 
2.32.0