Messages in this thread Patch in this message | | | From | Philip Avinash <> | Subject | [PATCH v2] pwm: pwm-tiehrpwm: Update the clock handling of pwm-tiehrpwm driver | Date | Thu, 10 Jan 2013 18:35:26 +0530 |
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From: "Philip, Avinash" <avinashphilip@ti.com>
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> --- Changes Since v1: - Check the return value of TBCLK enable in .pwm_enable()
In 3.8-rc1, common clock frame work support added to AM335x.
drivers/pwm/pwm-tiehrpwm.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/pwm/pwm-tiehrpwm.c b/drivers/pwm/pwm-tiehrpwm.c index 72a6dd4..4fcafbf 100644 --- a/drivers/pwm/pwm-tiehrpwm.c +++ b/drivers/pwm/pwm-tiehrpwm.c @@ -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); -- 1.7.9.5
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