On 11/16/10 4:37 AM, Hemanth V wrote:
> ----- Original Message -----
> From: "Grant Erickson" <[email protected]>
> Sent: Monday, November 15, 2010 12:58 AM
>
>> This patch adds support to request and use one or more of the OMAP
>> dual-mode timers as a generic PWM device compatible with other generic
>> PWM drivers such as the PWM backlight or PWM beeper driver.
>
> Generally PWMs are supported on PMIC chip. Is this driver intended for use
> when OMAP is used standalone?
Correct.
>> Boards can register such devices using platform data such as in the
>> following
>> example:
>>
>> static struct omap2_pwm_platform_config pwm_config = {
>> .timer_id = 10, // GPT10_PWM_EVT
>
> Since only specific GPTs can be configured for PWM, can some check
> we added in probe function?
Yes, that check is already present in the probe function:
pwm->dm_timer = omap_dm_timer_request_specific(pdata->timer_id);
if (pwm->dm_timer == NULL) {
status = -ENOENT;
goto err_free;
}
> Can the above file be part of mach-omap2, since comment say its
> specifically for OMAP2/3 or will this work on OMAP1 also?
It should work wherever dmtimers are supported. To the extent that dmtimer.c
is in plat-omap/, I located pwm.c there as well.
Thanks for the feedback!
Best,
Grant
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