[RFC PATCH 1/6] hwmon: axi-fan-control: make sure the clock is enabled
From: Nuno Sá <nuno.sa@analog.com>
Date: 2021-07-08 11:58:47
Also in:
linux-hwmon
Subsystem:
axi-fan-control hardware monitor driver, hardware monitoring, the rest · Maintainers:
Nuno Sá, Guenter Roeck, Linus Torvalds
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