[PATCH] ep93xx: add errata info about pwm outputs

[Ryan Mallon]

H Hartley Sweeten wrote:
> The EP93xx User's guide has an error about the number of pwm
> channels available in the various chips.  Add comments about
> this in the driver since the guide will probably never get
> updated.
> 
>   EP9301/02 only have pwm.1, pin PMWOUT is not on the chip
>   EP9307 only has pwm.0, pin PWMOUT1 (EGPIO14) is not on the chip
>   EP9312/15 have both pwm0 and pwm.1
> 
> Signed-off-by: H Hartley Sweeten <hsweeten at visionengravers.com>
> Cc: Ryan Mallon <ryan at bluewatersys.com>
> 
> ---
> 
> diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
> index f95dc16..f30be28 100644
> --- a/arch/arm/mach-ep93xx/core.c
> +++ b/arch/arm/mach-ep93xx/core.c
> @@ -648,6 +648,7 @@ static struct platform_device ep93xx_pwm1_device = {
>  
>  void __init ep93xx_register_pwm(int pwm0, int pwm1)
>  {
> +	/* NOTE: EP9301/02 do not have PWMOUT */
>  	if (pwm0)
>  		platform_device_register(&ep93xx_pwm0_device);
>  
> diff --git a/drivers/misc/ep93xx_pwm.c b/drivers/misc/ep93xx_pwm.c
> index ba46941..de9f405 100644
> --- a/drivers/misc/ep93xx_pwm.c
> +++ b/drivers/misc/ep93xx_pwm.c
> @@ -9,12 +9,18 @@
>   *	as published by the Free Software Foundation; either version
>   *	2 of the License, or (at your option) any later version.
>   *
> - *  EP9307 has only one channel:
> - *    - PWMOUT
> + * The EP93xx User's Guide has an error about the number of pwm channels
> + * available in the various chips.

Is there an official errata for this that we can link to?

~Ryan

-- 
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