[PATCH 3/5] mx51: Add mx51 processor to the pwm driver

[Uwe Kleine-König]

On Tue, Nov 16, 2010 at 10:36:35AM -0800, Fabio Estevam wrote:
> Signed-off-by: Fabio Estevam <fabio.estevam at freescale.com>
> ---
>  arch/arm/plat-mxc/pwm.c |    8 +++++---
>  1 files changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/arm/plat-mxc/pwm.c b/arch/arm/plat-mxc/pwm.c
> index c36f263..c6cdced 100644
> --- a/arch/arm/plat-mxc/pwm.c
> +++ b/arch/arm/plat-mxc/pwm.c
> @@ -26,7 +26,7 @@
>  #define MX1_PWMP    0x08   /* PWM Period Register */
>  
>  
> -/* i.MX27, i.MX31, i.MX35 share the same PWM function block: */
> +/* i.MX25/27/31/35/51 share the same PWM function block: */
If this is correct, ...
>  
>  #define MX3_PWMCR                 0x00    /* PWM Control Register */
>  #define MX3_PWMSAR                0x0C    /* PWM Sample Register */
> @@ -57,7 +57,7 @@ int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns)
>      if (pwm == NULL || period_ns == 0 || duty_ns > period_ns)
>          return -EINVAL;
>  
> -    if (cpu_is_mx27() || cpu_is_mx3() || cpu_is_mx25()) {
> +    if (cpu_is_mx27() || cpu_is_mx3() || cpu_is_mx25() || cpu_is_mx51()) {
>          unsigned long long c;
>          unsigned long period_cycles, duty_cycles, prescale;
>          u32 cr;
> @@ -79,7 +79,7 @@ int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns)
>  
>          cr = MX3_PWMCR_PRESCALER(prescale) | MX3_PWMCR_EN;
>  
> -        if (cpu_is_mx25())
> +        if (cpu_is_mx25() || cpu_is_mx51())
I wonder why mx27 and mx3 are missing here.

>              cr |= MX3_PWMCR_CLKSRC_IPG;
>          else
>              cr |= MX3_PWMCR_CLKSRC_IPG_HIGH;
> @@ -198,6 +198,7 @@ static int __devinit mxc_pwm_probe(struct platform_device *pdev)
>  
>      if (IS_ERR(pwm->clk)) {
>          ret = PTR_ERR(pwm->clk);
> +        dev_err(&pdev->dev, "can't get PWM clock\n");
>          goto err_free;
>      }
>  
> @@ -233,6 +234,7 @@ static int __devinit mxc_pwm_probe(struct platform_device *pdev)
>      mutex_unlock(&pwm_lock);
>  
>      platform_set_drvdata(pdev, pwm);
> +    dev_info(&pdev->dev, "i.MX PWM Driver Enabled\n");
>      return 0;
>  
>  err_free_mem:
Some general comments for this driver:

 - should move to drivers/something
 - IMHO should use platform ids to get rid of the cpu_is_ stuff

(And BTW, you forgot to use --thread making your mails being spread in
(at least my) lakml folder.)

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |