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pwm: rockchip: Disable irq for pwm config

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Add irq disabled protection at the PWM configuration, which can
speed up the PWM configuration and reduce the possibility of
interrupting the configuration.

Change-Id: I8ca3c4b9790b747c12804fa82b51456a0de7fb92
Signed-off-by: David Wu <david.wu@rock-chips.com>
This commit is contained in:
David Wu
2018-03-13 20:16:39 +08:00
committed by Tao Huang
parent aff06ee422
commit 906cea2b56
1 changed files with 4 additions and 0 deletions
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4
drivers/pwm/pwm-rockchip.c
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@@ -108,6 +108,7 @@ static void rockchip_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
{
struct rockchip_pwm_chip *pc = to_rockchip_pwm_chip(chip);
unsigned long period, duty;
unsigned long flags;
u64 clk_rate, div;
u32 ctrl;
@@ -125,6 +126,7 @@ static void rockchip_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
div = clk_rate * state->duty_cycle;
duty = DIV_ROUND_CLOSEST_ULL(div, pc->data->prescaler * NSEC_PER_SEC);
local_irq_save(flags);
/*
* Lock the period and duty of previous configuration, then
* change the duty and period, that would not be effective.
@@ -136,6 +138,7 @@ static void rockchip_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
else
ctrl &= ~PWM_ENABLE;
}
if (pc->data->supports_lock) {
ctrl |= PWM_LOCK_EN;
writel_relaxed(ctrl, pc->base + pc->data->regs.ctrl);
@@ -161,6 +164,7 @@ static void rockchip_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
ctrl &= ~PWM_LOCK_EN;
writel(ctrl, pc->base + pc->data->regs.ctrl);
local_irq_restore(flags);
}
static int rockchip_pwm_enable(struct pwm_chip *chip,