From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Ruehl Subject: imx27: pinctrl: GPIO set output value failed Date: Mon, 13 Jan 2014 18:58:05 +0800 Message-ID: <52D3C6BD.1090606@gtsys.com.hk> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: devicetree@vger.kernel.org Hi, some kind of weired problem: some GPIO's can modified via /sysfs others cannot Working OK [ 1.553601] imx27-pinctrl 10015000.iomuxc: imx1_pmx_enable, pin 0x9, function 0, gpio 1, direction 1, oconf 3, iconfa 0, iconfb 0 [ 1.553657] imx27-pinctrl 10015000.iomuxc: write: register 0xf4415004 offset 18 value 0x3 [ 1.553712] imx27-pinctrl 10015000.iomuxc: write: register 0xf441500c offset 18 value 0x0 [ 1.553766] imx27-pinctrl 10015000.iomuxc: write: register 0xf4415010 offset 18 value 0x0 NOT Working [ 1.553833] imx27-pinctrl 10015000.iomuxc: imx1_pmx_enable, pin 0xa, function 0, gpio 1, direction 1, oconf 3, iconfa 0, iconfb 0 [ 1.553889] imx27-pinctrl 10015000.iomuxc: write: register 0xf4415004 offset 20 value 0x3 [ 1.553944] imx27-pinctrl 10015000.iomuxc: write: register 0xf441500c offset 20 value 0x0 [ 1.553997] imx27-pinctrl 10015000.iomuxc: write: register 0xf4415010 offset 20 value 0x0 GPIOs 0-31, platform/10015000.gpio, 10015000.gpio: gpio-9 (sysfs ) out hi gpio-10 (sysfs ) out lo gpio-12 (sysfs ) out lo gpio-14 (sysfs ) in hi gpio-16 (sysfs ) in hi gpio-24 (green ) out hi gpio-26 (red ) out lo gpio-30 (yellow ) out lo gpio-31 (10024170.usbphy ) out hi root@gtsir20:~# echo 1 > /sys/class/gpio/gpio10/value root@gtsir20:~# cat /sys/kernel/debug/gpio GPIOs 0-31, platform/10015000.gpio, 10015000.gpio: gpio-9 (sysfs ) out hi gpio-10 (sysfs ) out lo gpio-12 (sysfs ) out lo gpio-14 (sysfs ) in hi gpio-16 (sysfs ) in hi gpio-24 (green ) out hi gpio-26 (red ) out lo gpio-30 (yellow ) out lo gpio-31 (10024170.usbphy ) out hi pinctrl_userio1: userio1-1 { fsl,pins = < /* 2x GPIO in */ /* MX27_PAD_LD8__GPIO1_14 (in) */ /* MX27_PAD_LD10__GPIO1_16 (in) */ 0x0e 0x032 0x0 0x10 0x032 0x0 /* 3x GPIO out */ /* UHF Enable */ MX27_PAD_LD3__GPIO1_9 0x0 MX27_PAD_LD4__GPIO1_10 0x0 MX27_PAD_LD6__GPIO1_12 0x0 /* LED 1,2,3 */ MX27_PAD_PS__GPIO1_26 0x0 MX27_PAD_CONTRAST__GPIO1_30 0x0 MX27_PAD_REV__GPIO1_24 0x0 ... I review the pinctrl code but cannot find the problem. Help needed. Thanks Chris -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html