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rockchip: pwm: add mask for config setting

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Use mask to clear old setting before direct set the new config,
or else there it will mess up the config when it's not the same
with default value.

Fixes: 3851059 rockchip: Setup default PWM flags
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
This commit is contained in:
Kever Yang 2017-07-19 19:54:23 +08:00 • committed by Philipp Tomsich
parent 3030c951f1
commit 06f4e36baf
2 changed files with 3 additions and 0 deletions
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2
arch/arm/include/asm/arch-rockchip/pwm.h
View file

@ -25,9 +25,11 @@ check_member(rk3288_pwm, ctrl, 0xc);
#define PWM_DUTY_POSTIVE (1 << 3)
#define PWM_DUTY_NEGATIVE (0 << 3)
#define PWM_DUTY_MASK (1 << 3)
#define PWM_INACTIVE_POSTIVE (1 << 4)
#define PWM_INACTIVE_NEGATIVE (0 << 4)
#define PWM_INACTIVE_MASK (1 << 4)
#define PWM_OUTPUT_LEFT (0 << 5)
#define PWM_OUTPUT_CENTER (1 << 5)

1
drivers/pwm/rk_pwm.c
View file

@ -29,6 +29,7 @@ static int rk_pwm_set_invert(struct udevice *dev, uint channel, bool polarity)
struct rk_pwm_priv *priv = dev_get_priv(dev);
debug("%s: polarity=%u\n", __func__, polarity);
priv->enable_conf &= ~(PWM_DUTY_MASK | PWM_INACTIVE_MASK);
if (polarity)
priv->enable_conf |= PWM_DUTY_NEGATIVE | PWM_INACTIVE_POSTIVE;
else