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1 // SPDX-License-Identifier: GPL-2.0+3 * Generic driver for memory-mapped GPIO controllers.10 * ..The simplest form of a GPIO controller that the driver supports is``11 * `.just a single "data" register, where GPIO state can be read and/or `16 __________|~$@~~~ %~ /o*o*o*o*o*o\ .. Implementing such a GPIO .22 * . big-endian notation, just`. .. A bit more sophisticated controllers ,23 * . register the device with -be`. .with a pair of set/clear-bit registers ,29 * .. The expectation is that in at least some cases . ,-~~~-,30 * .this will be used with roll-your-own ASIC/FPGA .` \ /58 #include <linux/gpio/driver.h>[all …]