diff options
| author | Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> | 2016-06-22 22:22:18 +0300 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2016-06-29 21:54:00 -0700 |
| commit | a74a198249c473fba092ee549068cea30d54f07e (patch) | |
| tree | 674a20fb59ea4f47516a643233e3b87935b8de8c /drivers/pwm | |
| parent | 4406d52a0b735b27472846953fd0565302af6f3c (diff) | |
| download | linux-a74a198249c473fba092ee549068cea30d54f07e.tar.gz | |
pwm: omap-dmtimer: Allow for setting dmtimer clock source
OMAP GP timers can have different input clocks that allow different PWM frequencies. However, there is no other way of setting the clock source but through clocks or clock-names properties of the timer itself. This limits PWM functionality to only the frequencies allowed by the particular clock source. Allowing setting the clock source by PWM rather than by timer allows different PWMs to have different ranges by not hard-wiring the clock source to the timer. Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> Acked-by: Rob Herring <robh@kernel.org> Acked-by: Thierry Reding <treding@nvidia.com> Acked-by: Pali Rohár <pali.rohar@gmail.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'drivers/pwm')
| -rw-r--r-- | drivers/pwm/pwm-omap-dmtimer.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/pwm/pwm-omap-dmtimer.c b/drivers/pwm/pwm-omap-dmtimer.c index 3e95090cd7cf..5ad42f33e70c 100644 --- a/drivers/pwm/pwm-omap-dmtimer.c +++ b/drivers/pwm/pwm-omap-dmtimer.c @@ -245,7 +245,7 @@ static int pwm_omap_dmtimer_probe(struct platform_device *pdev) struct pwm_omap_dmtimer_chip *omap; struct pwm_omap_dmtimer_pdata *pdata; pwm_omap_dmtimer *dm_timer; - u32 prescaler; + u32 v; int status; pdata = dev_get_platdata(&pdev->dev); @@ -306,10 +306,12 @@ static int pwm_omap_dmtimer_probe(struct platform_device *pdev) if (pm_runtime_active(&omap->dm_timer_pdev->dev)) omap->pdata->stop(omap->dm_timer); - /* setup dmtimer prescaler */ - if (!of_property_read_u32(pdev->dev.of_node, "ti,prescaler", - &prescaler)) - omap->pdata->set_prescaler(omap->dm_timer, prescaler); + if (!of_property_read_u32(pdev->dev.of_node, "ti,prescaler", &v)) + omap->pdata->set_prescaler(omap->dm_timer, v); + + /* setup dmtimer clock source */ + if (!of_property_read_u32(pdev->dev.of_node, "ti,clock-source", &v)) + omap->pdata->set_source(omap->dm_timer, v); omap->chip.dev = &pdev->dev; omap->chip.ops = &pwm_omap_dmtimer_ops; |