From mboxrd@z Thu Jan 1 00:00:00 1970 From: boris.brezillon@free-electrons.com (Boris BREZILLON) Date: Fri, 25 Jul 2014 11:31:10 +0200 Subject: [PATCH] ARM: at91: at91sam9x5: sets NPCS0 (PA14) back to GPIO In-Reply-To: <53D21FCF.7010402@aksignal.cz> References: <1405074175-22444-1-git-send-email-voice.shen@atmel.com> <53D10C50.50305@aksignal.cz> <20140724162645.4e19c26c@bbrezillon> <53D12103.3020103@aksignal.cz> <20140724175848.44f5da10@bbrezillon> <53D1F5D0.1080006@aksignal.cz> <20140725095319.16a8465c@bbrezillon> <53D214E1.4050105@aksignal.cz> <20140725104553.403921b1@bbrezillon> <53D21B3F.7060006@aksignal.cz> <20140725110124.3f0dce6c@bbrezillon> <53D21FCF.7010402@aksignal.cz> Message-ID: <20140725113110.70c4aa41@bbrezillon> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Fri, 25 Jul 2014 11:13:51 +0200 Ji?? Prchal wrote: > > > > Every thing seems in place. > > Could you enable CONFIG_DEBUG_PINCTRL and grep on "enable pin" ? > / # dmesg | grep "enable pin" > [ 0.968750] pinctrl-at91 ahb:apb:pinctrl at fffff400: enable pin 101 as GPIO > [ 0.968750] pinctrl-at91 ahb:apb:pinctrl at fffff400: enable pin 101 as PIOD5 0x20 > [ 0.968750] pinctrl-at91 ahb:apb:pinctrl at fffff400: enable pin 100 as GPIO > [ 0.968750] pinctrl-at91 ahb:apb:pinctrl at fffff400: enable pin 100 as PIOD4 0x10 > [ 1.238281] pinctrl-at91 ahb:apb:pinctrl at fffff400: enable pin 23 as GPIO > [ 1.238281] pinctrl-at91 ahb:apb:pinctrl at fffff400: enable pin 23 as PIOA23 0x800000 > [ 1.238281] pinctrl-at91 ahb:apb:pinctrl at fffff400: enable pin 22 as GPIO > [ 1.238281] pinctrl-at91 ahb:apb:pinctrl at fffff400: enable pin 22 as PIOA22 0x400000 > [ 1.242187] pinctrl-at91 ahb:apb:pinctrl at fffff400: enable pin 93 as GPIO > [ 1.242187] pinctrl-at91 ahb:apb:pinctrl at fffff400: enable pin 93 as PIOC29 0x20000000 > [ 1.246093] pinctrl-at91 ahb:apb:pinctrl at fffff400: enable pin 14 as GPIO > [ 1.246093] pinctrl-at91 ahb:apb:pinctrl at fffff400: enable pin 14 as PIOA14 0x4000 Okay, this cleary shows that PA14 pin is muxed as a GPIO (or at least the driver think it is). Could you launch these commands (you'll need the devmem tool) and paste the results ? #devmem 0xfffff408 #devmem 0xfffff418 #devmem 0xfffff438 #devmem 0xfffff43c #devmem 0xfffff458 #devmem 0xfffff468 #devmem 0xfffff470 #devmem 0xfffff474 #devmem 0xfffff498 -- Boris Brezillon, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com