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Date: Thu, 30 Jun 2011 20:55:33 -0400 From: Mike Frysinger <vapier.adi@...il.com> To: H Hartley Sweeten <hartleys@...ionengravers.com> Cc: Ryan Mallon <rmallon@...il.com>, Sascha Hauer <s.hauer@...gutronix.de>, Bill Gatliff <bgat@...lgatliff.com>, Arnd Bergmann <arnd@...db.de>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Ryan Mallon <ryan@...ewatersys.com>, Shawn Guo <shawn.guo@...aro.org>, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>, Linus Walleij <linus.walleij@...aro.org> Subject: Re: [PATCH 1/3] PWM: add pwm framework support On Thu, Jun 30, 2011 at 20:33, H Hartley Sweeten wrote: > On Thursday, June 30, 2011 4:24 PM, Ryan Mallon wrote: >> On 01/07/11 03:02, Sascha Hauer wrote: >>> I think that you made the fundamental mistake to completly ignore the >>> existing pwm API and its users. With a competing api we are basically >>> stuck. We can't convert the existing hardware drivers to the new API >>> because leds-pwm.c, pwm_bl.c and others still depend on the old API and >>> boards using it would break. >> >> I don't think this is really a blocker to Bill's patches. There are >> three (that I can see) pwm users currently: >> drivers/video/backlight/pwm_bl.c >> drivers/leds/leds-pwm.c >> drivers/input/misc/pwm-beeper.c >> >> All of those drivers are trivial and good easily be updated to work with >> Bill's patches. Bill already provided a leds-pwm driver. > > I agree with Ryan. The three drivers listed above appear to be the only > pwm "user" drivers. They are all trivial and could be updated easily. indeed ... the current pwm API is almost toy like in its simplicity. > The "core" drivers using the existing API appear to be: > arch/blackfin/kernel/pwm.c i only wrote this because Bill's subsystem wasnt yet merged. but i made sure that it was done in such a way that it's trivial to convert over to Bill's work once it's done. -mike -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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