Changelog: v2: 1. Remove "pinctrl-single,gpio-mask". Since GPIO function is one of the mux function in the pinmux register of both OMAP and PXA/MMP silicons. Use "pinctrl-single,function-mask" instead. 2. Remove "pinctrl-single,gpio-enable" & "pinctrl-single,gpio-disable". Use "pinctrl-single,gpio-func" instead. Because GPIO mode is only one of the mux functions in the pinmux register. Defining "gpio-enable" & "gpio-disable" are redundant. 3. Define register with __iomem, not u32 type. 4. Remove "pinctrl-single,input-schmit-shift", "pinctrl-single,power-source-shift", "pinctrl-single,bias-shift". All these properties could be calculated by mask fields. 5. Return -EPROBE_DEFER if pinmux could be got in device driver. And the device driver would be probed again deferred.
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