On 08/26/2013 09:48 PM, Xiubo Li-B47053 wrote: > Hi Stephen, > > >> Subject: Re: [PATCH 4/4] Documentation: Add device tree bindings for >> Freescale FTM PWM >> >> On 08/25/2013 11:35 PM, Xiubo Li-B47053 wrote: >>>> Subject: Re: [PATCH 4/4] Documentation: Add device tree bindings for >> ... >>>>> Why do you need to manipulate the pinctrl to en/disable a channel? >>>> >>>> This is because in Vybrid VF610 TOWER board, there are 4 leds, and >>>> each led's one point(diode's positive pole) is connected to 3.3V, and >>>> the other point is connected to pwm's one channel. When the 4 >>>> pinctrls are configured as enable at the same time, the 4 pinctrls is >>>> low valtage, and the 4 leds will be lighted up as default, then when >>>> you enable/disable one led will effects others. >>>> >>>> These pinctrls are belong to pwm, and I don't think led or other >>>> customer could control them directly. >>>> So, here I authorize the 4 pinctrls to each channel controls. >>>> >>> " >>> For the reason above, I have to control the pinctrls separately. >>> >>> If all the pinctrls set as default state, the 8 pinctrls must be >> controlled together. >>> And the 4 leds will all be lighted up as default and will influence >> each other. >> >> Sorry, that still doesn't make much sense. ... What may help here is to show the exact content you expect the various en/dis states to have, so that we can see exactly which pinctrl options get set when and why. -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
