Messages in this thread | | | Date | Wed, 18 May 2011 22:02:47 +0200 | Subject | Re: [PATCH 0/4] Pinmux subsystem | From | Linus Walleij <> |
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2011/5/17 Kyungmin Park <kmpark@infradead.org>:
> In this case we only need to set the function at interrupt by like > s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(0xf)); > So pinmux function provides this feature also.
This function: s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(0xf));
Isn't part of the gpiolib I can see, I am discussing with Grant how to handle custom GPIO configuration. Looking in archa/arm/plat-samsung/include/plat/gpio-core.h it looks like you have your own reimplementation of the entire gpiolib in order to get these special configuration functions... (So hopefully if I can add custom GPIO configs to gpiolib, all of this can move to drivers/gpio/*)
So I don't know exactly what this means, if it means that you want to mux pin 0xf to become GPIO, then yes, in the pinmux framework you would:
pinmux_request_gpio(pinno, gpiono);
(As you see pins and GPIOs are now in different address spaces and that is why two number have to be given, but if you manage it the number space it can basically be the same number if the platform so permits.)
Yours, Linus Walleij
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