pwm: lpc32xx: Remove handling of PWM channels
[ Upstream commit 4aae44f6 ] Because LPC32xx PWM controllers have only a single output which is registered as the only PWM device/channel per controller, it is known in advance that pwm->hwpwm value is always 0. On basis of this fact simplify the code by removing operations with pwm->hwpwm, there is no controls which require channel number as input. Even though I wasn't aware at the time when I forward ported that patch, this fixes a null pointer dereference as lpc32xx->chip.pwms is NULL before devm_pwmchip_add() is called. Reported-by:Dan Carpenter <dan.carpenter@linaro.org> Signed-off-by:
Vladimir Zapolskiy <vz@mleia.com> Signed-off-by:
Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Fixes: 3d2813fb ("pwm: lpc32xx: Don't modify HW state in .probe() after the PWM chip was registered") Signed-off-by:
Thierry Reding <thierry.reding@gmail.com> Signed-off-by:
Sasha Levin <sashal@kernel.org>
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