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pwm: rockchip: keep the mode fixed in capture mode although pwm is disabled

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The PWM io input/output state is controlled by PWM mode
configuration. In order to avoid the antagonistic drive
state between the PWM pin and the external pin, keep the
PWM mode fixed in capture mode although PWM is disabled.

Change-Id: I6183987c9bef6f444726643f878c5384f63844d0
Signed-off-by: Damon Ding <damon.ding@rock-chips.com>
This commit is contained in:
Damon Ding
2024-04-23 14:49:14 +08:00
parent 40e33abf50
commit 718382dfea
1 changed files with 18 additions and 5 deletions
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23
drivers/pwm/pwm-rockchip.c
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@@ -604,10 +604,18 @@ static int rockchip_pwm_enable_v1(struct pwm_chip *chip, struct pwm_device *pwm,
enable_conf |= PWM_CAPTURE;
}
if (enable)
if (enable) {
val |= enable_conf;
else
val &= ~enable_conf;
} else {
/*
* The PWM io input/output state is controlled by PWM mode
* configuration. In order to avoid the antagonistic drive
* state between the PWM pin and the external pin, keep the
* PWM mode fixed in capture mode although PWM is disabled.
*/
if (pc->capture_en)
val |= PWM_CAPTURE;
}
writel_relaxed(val, pc->base + PWM_CTRL_V1);
if (pc->data->vop_pwm)
@@ -919,8 +927,13 @@ static void rockchip_pwm_set_capture_v4(struct pwm_chip *chip, struct pwm_device
pc->capture_cnt = 0;
writel_relaxed(enable ? PWM_MODE(CAPTURE_MODE) : PWM_MODE(CONTINUOUS_MODE),
pc->base + CTRL_V4);
/*
* The PWM io input/output state is controlled by PWM mode
* configuration. In order to avoid the antagonistic drive
* state between the PWM pin and the external pin, keep the
* PWM mode fixed in capture mode although PWM is disabled.
*/
writel_relaxed(PWM_MODE(CAPTURE_MODE), pc->base + CTRL_V4);
writel_relaxed(CAP_LPR_INT_EN(enable) | CAP_HPR_INT_EN(enable) | PWM_IN_SEL(channel_sel),
pc->base + INT_EN);
}