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Code Issues Releases Wiki Activity

pwm: mxs: Remove legacy methods

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Since we now have ->apply(), these are no longer relevant.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Rasmus Villemoes 2019-10-04 15:32:03 +02:00 committed by Thierry Reding
parent bf29c2ff82
commit ebbfb1592c
1 changed files with 0 additions and 77 deletions
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77
drivers/pwm/pwm-mxs.c
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@ -110,85 +110,8 @@ static int mxs_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
return 0;
}
static int mxs_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
int duty_ns, int period_ns)
{
struct mxs_pwm_chip *mxs = to_mxs_pwm_chip(chip);
int ret, div = 0;
unsigned int period_cycles, duty_cycles;
unsigned long rate;
unsigned long long c;
rate = clk_get_rate(mxs->clk);
while (1) {
c = rate / cdiv[div];
c = c * period_ns;
do_div(c, 1000000000);
if (c < PERIOD_PERIOD_MAX)
break;
div++;
if (div >= PERIOD_CDIV_MAX)
return -EINVAL;
}
period_cycles = c;
c *= duty_ns;
do_div(c, period_ns);
duty_cycles = c;
/*
* If the PWM channel is disabled, make sure to turn on the clock
* before writing the register. Otherwise, keep it enabled.
*/
if (!pwm_is_enabled(pwm)) {
ret = clk_prepare_enable(mxs->clk);
if (ret)
return ret;
}
writel(duty_cycles << 16,
mxs->base + PWM_ACTIVE0 + pwm->hwpwm * 0x20);
writel(PERIOD_PERIOD(period_cycles) | PERIOD_ACTIVE_HIGH |
PERIOD_INACTIVE_LOW | PERIOD_CDIV(div),
mxs->base + PWM_PERIOD0 + pwm->hwpwm * 0x20);
/*
* If the PWM is not enabled, turn the clock off again to save power.
*/
if (!pwm_is_enabled(pwm))
clk_disable_unprepare(mxs->clk);
return 0;
}
static int mxs_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
{
struct mxs_pwm_chip *mxs = to_mxs_pwm_chip(chip);
int ret;
ret = clk_prepare_enable(mxs->clk);
if (ret)
return ret;
writel(1 << pwm->hwpwm, mxs->base + PWM_CTRL + SET);
return 0;
}
static void mxs_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
{
struct mxs_pwm_chip *mxs = to_mxs_pwm_chip(chip);
writel(1 << pwm->hwpwm, mxs->base + PWM_CTRL + CLR);
clk_disable_unprepare(mxs->clk);
}
static const struct pwm_ops mxs_pwm_ops = {
.apply = mxs_pwm_apply,
.config = mxs_pwm_config,
.enable = mxs_pwm_enable,
.disable = mxs_pwm_disable,
.owner = THIS_MODULE,
};