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pwm: pwm-tiehrpwm: Update the clock handling of pwm-tiehrpwm driver 

The clock framework has changed and it's now better to invoke
clock_prepare_enable() and clk_disable_unprepare() rather than the
legacy clk_enable() and clk_disable() calls. This patch converts the
pwm-tiehrpwm driver to the new framework.

Signed-off-by: Philip Avinash <avinashphilip@ti.com>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
This commit is contained in:
Philip, Avinash 2013-01-10 18:35:26 +05:30 committed by Thierry Reding
parent 3ccb1c1702
commit 0074b49b3f
1 changed files with 8 additions and 2 deletions
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10
drivers/pwm/pwm-tiehrpwm.c
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@ -318,6 +318,7 @@ static int ehrpwm_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
{
struct ehrpwm_pwm_chip *pc = to_ehrpwm_pwm_chip(chip);
unsigned short aqcsfrc_val, aqcsfrc_mask;
int ret;
/* Leave clock enabled on enabling PWM */
pm_runtime_get_sync(chip->dev);
@ -341,7 +342,12 @@ static int ehrpwm_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
configure_polarity(pc, pwm->hwpwm);
/* Enable TBCLK before enabling PWM device */
clk_enable(pc->tbclk);
ret = clk_prepare_enable(pc->tbclk);
if (ret) {
pr_err("Failed to enable TBCLK for %s\n",
dev_name(pc->chip.dev));
return ret;
}
/* Enable time counter for free_run */
ehrpwm_modify(pc->mmio_base, TBCTL, TBCTL_RUN_MASK, TBCTL_FREE_RUN);
@ -372,7 +378,7 @@ static void ehrpwm_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
ehrpwm_modify(pc->mmio_base, AQCSFRC, aqcsfrc_mask, aqcsfrc_val);
/* Disabling TBCLK on PWM disable */
clk_disable(pc->tbclk);
clk_disable_unprepare(pc->tbclk);
/* Stop Time base counter */
ehrpwm_modify(pc->mmio_base, TBCTL, TBCTL_RUN_MASK, TBCTL_STOP_NEXT);