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authorMika Westerberg <mika.westerberg@linux.intel.com>2014-09-15 14:09:44 (GMT)
committerLinus Walleij <linus.walleij@linaro.org>2014-09-23 15:51:39 (GMT)
commit7ca267faba8ad097f57cb71c32ae1865de83241a (patch)
treed8ae52f88f30ef5e170a39bd0695091cdfa1769c /include/asm-generic
parent56b427678cc3c1c4e305a96c9cfa8ba985c70a48 (diff)
downloadlinux-7ca267faba8ad097f57cb71c32ae1865de83241a.tar.xz
gpio: Increase ARCH_NR_GPIOs to 512
Some newer Intel SoCs, like Braswell already have more than 256 GPIOs available so the default limit is exceeded. Instead of adding more architecture specific gpio.h files with custom ARCH_NR_GPIOs we increase the gpiolib default limit to be twice the current. Current generic ARCH_NR_GPIOS limit is 256 which starts to be too small for newer Intel SoCs like Braswell. In order to support GPIO controllers on these SoCs we increase ARCH_NR_GPIOS to be 512 which should be sufficient for now. The kernel size increases a bit with this change. Below is an example of x86_64 kernel image. ARCH_NR_GPIOS=256 text data bss dec hex filename 11476173 1971328 1265664 14713165 e0814d vmlinux ARCH_NR_GPIOS=512 text data bss dec hex filename 11476173 1971328 1269760 14717261 e0914d vmlinux So the BSS size and this the kernel image size increases by 4k. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'include/asm-generic')
-rw-r--r--include/asm-generic/gpio.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h
index c1d4105..383ade1 100644
--- a/include/asm-generic/gpio.h
+++ b/include/asm-generic/gpio.h
@@ -27,7 +27,7 @@
*/
#ifndef ARCH_NR_GPIOS
-#define ARCH_NR_GPIOS 256
+#define ARCH_NR_GPIOS 512
#endif
/*