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pwm: vt8500: Change prototype of a helper to prepare further changes

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This prepares the driver for further changes that will make it harder to
determine the pwm_chip from a given vt8500_chip. To just not have to do
that, rework vt8500_pwm_busy_wait() to take a pwm_chip.

Link: https://lore.kernel.org/r/fb384c550b359e7707219f87872bcf36482875ff.1707900770.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
This commit is contained in:
Uwe Kleine-König 2024-02-14 10:33:12 +01:00
parent 7fe09324df
commit 58803adcb7
1 changed files with 10 additions and 9 deletions
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19
drivers/pwm/pwm-vt8500.c
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@ -53,8 +53,9 @@ struct vt8500_chip {
#define to_vt8500_chip(chip) container_of(chip, struct vt8500_chip, chip)
#define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
static inline void vt8500_pwm_busy_wait(struct vt8500_chip *vt8500, int nr, u8 bitmask)
static inline void vt8500_pwm_busy_wait(struct pwm_chip *chip, int nr, u8 bitmask)
{
struct vt8500_chip *vt8500 = to_vt8500_chip(chip);
int loops = msecs_to_loops(10);
u32 mask = bitmask << (nr << 8);
@ -62,7 +63,7 @@ static inline void vt8500_pwm_busy_wait(struct vt8500_chip *vt8500, int nr, u8 b
cpu_relax();
if (unlikely(!loops))
dev_warn(vt8500->chip.dev, "Waiting for status bits 0x%x to clear timed out\n",
dev_warn(chip->dev, "Waiting for status bits 0x%x to clear timed out\n",
mask);
}
@ -103,18 +104,18 @@ static int vt8500_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
dc = div64_u64(c, period_ns);
writel(prescale, vt8500->base + REG_SCALAR(pwm->hwpwm));
vt8500_pwm_busy_wait(vt8500, pwm->hwpwm, STATUS_SCALAR_UPDATE);
vt8500_pwm_busy_wait(chip, pwm->hwpwm, STATUS_SCALAR_UPDATE);
writel(pv, vt8500->base + REG_PERIOD(pwm->hwpwm));
vt8500_pwm_busy_wait(vt8500, pwm->hwpwm, STATUS_PERIOD_UPDATE);
vt8500_pwm_busy_wait(chip, pwm->hwpwm, STATUS_PERIOD_UPDATE);
writel(dc, vt8500->base + REG_DUTY(pwm->hwpwm));
vt8500_pwm_busy_wait(vt8500, pwm->hwpwm, STATUS_DUTY_UPDATE);
vt8500_pwm_busy_wait(chip, pwm->hwpwm, STATUS_DUTY_UPDATE);
val = readl(vt8500->base + REG_CTRL(pwm->hwpwm));
val |= CTRL_AUTOLOAD;
writel(val, vt8500->base + REG_CTRL(pwm->hwpwm));
vt8500_pwm_busy_wait(vt8500, pwm->hwpwm, STATUS_CTRL_UPDATE);
vt8500_pwm_busy_wait(chip, pwm->hwpwm, STATUS_CTRL_UPDATE);
clk_disable(vt8500->clk);
return 0;
@ -135,7 +136,7 @@ static int vt8500_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
val = readl(vt8500->base + REG_CTRL(pwm->hwpwm));
val |= CTRL_ENABLE;
writel(val, vt8500->base + REG_CTRL(pwm->hwpwm));
vt8500_pwm_busy_wait(vt8500, pwm->hwpwm, STATUS_CTRL_UPDATE);
vt8500_pwm_busy_wait(chip, pwm->hwpwm, STATUS_CTRL_UPDATE);
return 0;
}
@ -148,7 +149,7 @@ static void vt8500_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
val = readl(vt8500->base + REG_CTRL(pwm->hwpwm));
val &= ~CTRL_ENABLE;
writel(val, vt8500->base + REG_CTRL(pwm->hwpwm));
vt8500_pwm_busy_wait(vt8500, pwm->hwpwm, STATUS_CTRL_UPDATE);
vt8500_pwm_busy_wait(chip, pwm->hwpwm, STATUS_CTRL_UPDATE);
clk_disable(vt8500->clk);
}
@ -168,7 +169,7 @@ static int vt8500_pwm_set_polarity(struct pwm_chip *chip,
val &= ~CTRL_INVERT;
writel(val, vt8500->base + REG_CTRL(pwm->hwpwm));
vt8500_pwm_busy_wait(vt8500, pwm->hwpwm, STATUS_CTRL_UPDATE);
vt8500_pwm_busy_wait(chip, pwm->hwpwm, STATUS_CTRL_UPDATE);
return 0;
}