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hwmon: (axi-fan-control) Make sure the clock is enabled

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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>
Link: https://lore.kernel.org/r/20210811114853.159298-2-nuno.sa@analog.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Nuno Sá 2021-08-11 13:48:51 +02:00 committed by Guenter Roeck
parent 76b72736f5
commit a3933625de
1 changed files with 13 additions and 0 deletions
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13
drivers/hwmon/axi-fan-control.c
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@ -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;