BMC/Intel-BMC/linux.git/arch/unicore32/kernel/gpio.c, branch dev-4.6 Intel OpenBMC Linux kernel source tree (mirror) https://git.radix-linux.su/BMC/Intel-BMC/linux.git/atom?h=dev-4.6 2016-01-25T17:02:26+00:00 unicore: gpio: Be sure to clamp return value 2016-01-25T17:02:26+00:00 Linus Walleij linus.walleij@linaro.org 2015-12-21T21:45:55+00:00 urn:sha1:a80bb4c9ec200ab4fc3ad502bf80e00ca5db12a7 As we want gpio_chip .get() calls to be able to return negative error codes and propagate to drivers, we need to go over all drivers and make sure their return values are clamped to [0,1]. We do this by using the ret = !!(val) design pattern. Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> unicore32 io: redefine __REG(x) and re-use readl/writel funcs 2011-03-17T01:19:19+00:00 GuanXuetao gxt@mprc.pku.edu.cn 2011-02-26T13:21:18+00:00 urn:sha1:e5abf78b57199a417eb01ff922a5ea6ff9e10b61 -- by advice of Arnd Bergmann Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn> Reviewed-by: Arnd Bergmann <arnd@arndb.de> unicore32 core architecture: interrupts ang gpio handling 2011-03-17T01:19:10+00:00 GuanXuetao gxt@mprc.pku.edu.cn 2011-01-15T10:19:35+00:00 urn:sha1:752bcb4d02ccfd5e7a8d810424154169b4cca8ae This patch implements interrupts and gpio handling. UniCore32 has 9 gpio interrupt sources. And gpio device operations are also here. Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>