hwmon: (adt7470) Use cached PWM frequency value

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adt7470_pwm_read() currently ignores failures returned by
pwm1_freq_get(). If the register read fails, the negative error code is
returned through *val while the function itself reports success,
potentially exposing a negative PWM frequency through sysfs.

Fix this by using the cached PWM frequency maintained by the driver,
eliminating the register access from the read path.

Apart from the corrected error propagation and using the cached value,
no functional change is intended.

Fixes: ef67959c42 ("hwmon: (adt7470) Convert to use regmap")
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
Link: https://lore.kernel.org/r/20260727-adt7470_fixes-v2-6-598e38a46ba6@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

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Luiz Angelo Daros de Luca 2026-07-27 21:22:22 -03:00 • committed by Guenter Roeck

parent a385023152

commit 60677cd4c2

1 changed files with 18 additions and 2 deletions

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drivers/hwmon/adt7470.c

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