On 01/10/2015 05:38 PM, Stephen Warren wrote: > On 01/05/2015 08:33 AM, Bart Tanghe wrote: >> To probe the bcm2835-pwm driver properly, this dts bindings has to be added >> to the bcm2835 dtsi file. >> In expectation of a bcm2835 clock driver, I've added fixed-clock clock binding. >> To change the status of the gpio pins into pwm output pins, some additional >> bindings has to be added but this has not to be done automatically. >> Is it possible to document this bindings somewhere? > > The pinctrl bindings allow you to do this. They're documented in: > > Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt > Documentation/devicetree/bindings/pinctrl/brcm,bcm2835-gpio.txt > > pinctrl setup would typically be added to the board file (i.e. > arch/arm/boot/dts/bcm2835-rpi-b.dts) rather than the SoC file. I think > on the RPi, the pins that can generate PWM aren't dedicated to PWM by > the RPi board design (they could be GPIOs and probably other functions > too) so we probably need to leave it up to individual users to add PWM > configuration to their DT, if/when they use the PWM feature. > Indeed, the pins aren't dedicated to pwm and can be used for other functions. Is it usefull to add the pwm pinctrl description to Documentation/devicetree/bindings/pinctrl/brcm,bcm2835-gpio.txt or is this useless? Regards, Bart -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
