[PATCH v4 09/10] pwm: Add PXA support

[Shawn Guo]

On Wed, Mar 14, 2012 at 04:56:32PM +0100, Thierry Reding wrote:
> Signed-off-by: Thierry Reding <thierry.reding at avionic-design.de>
> ---
> Changes in v3:
>   - update PWM ops for changes in patch 2
> 
>  arch/arm/plat-pxa/Makefile |    1 -
>  arch/arm/plat-pxa/pwm.c    |  304 --------------------------------------------
>  drivers/pwm/Kconfig        |    9 ++
>  drivers/pwm/Makefile       |    1 +
>  drivers/pwm/pwm-pxa.c      |  244 +++++++++++++++++++++++++++++++++++
>  5 files changed, 254 insertions(+), 305 deletions(-)
>  delete mode 100644 arch/arm/plat-pxa/pwm.c
>  create mode 100644 drivers/pwm/pwm-pxa.c
> 
The patch should be generated with "git format-patch -M", so that we
can see the diff like below. 

--- a/arch/arm/plat-pxa/pwm.c
+++ b/drivers/pwm/pwm-pxa.c

-int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns)
+static int pxa_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
+                         int duty_ns, int period_ns)
 {
+       struct pxa_pwm_chip *pc = to_pxa_pwm_chip(chip);
        unsigned long long c;
        unsigned long period_cycles, prescale, pv, dc;
+       unsigned long offset;

-       if (pwm == NULL || period_ns == 0 || duty_ns > period_ns)
+       if (period_ns == 0 || duty_ns > period_ns)
                return -EINVAL;

Then I will have a question why "pwm == NULL" check is removed?

Regards,
Shawn