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authorFelix Fietkau <nbd@openwrt.org>2015-04-15 16:07:52 +0300
committerKalle Valo <kvalo@codeaurora.org>2015-05-09 16:28:06 +0300
commit2d57b7126d6d80b9b97ce83335a246ca796babd2 (patch)
tree4c78e295d449282e9f4e8ab91c6320a8ca745bf4 /drivers/bcma/driver_gpio.c
parentc43655345234acb974144c1527cab7af77369f3a (diff)
downloadlinux-2d57b7126d6d80b9b97ce83335a246ca796babd2.tar.xz
bcma: use absolute base for SoC GPIO pins
On some BCM5301x ARM devices, user space still needs to control some system GPIO pins for which no driver exists. This is a lot easier to do with a predictable GPIO base. Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/bcma/driver_gpio.c')
-rw-r--r--drivers/bcma/driver_gpio.c19
1 files changed, 10 insertions, 9 deletions
diff --git a/drivers/bcma/driver_gpio.c b/drivers/bcma/driver_gpio.c
index 74ccb02e0f10..9b8d9bfd036f 100644
--- a/drivers/bcma/driver_gpio.c
+++ b/drivers/bcma/driver_gpio.c
@@ -235,16 +235,17 @@ int bcma_gpio_init(struct bcma_drv_cc *cc)
}
/*
- * On MIPS we register GPIO devices (LEDs, buttons) using absolute GPIO
- * pin numbers. We don't have Device Tree there and we can't really use
- * relative (per chip) numbers.
- * So let's use predictable base for BCM47XX and "random" for all other.
+ * Register SoC GPIO devices with absolute GPIO pin base.
+ * On MIPS, we don't have Device Tree and we can't use relative (per chip)
+ * GPIO numbers.
+ * On some ARM devices, user space may want to access some system GPIO
+ * pins directly, which is easier to do with a predictable GPIO base.
*/
-#if IS_BUILTIN(CONFIG_BCM47XX)
- chip->base = bus->num * BCMA_GPIO_MAX_PINS;
-#else
- chip->base = -1;
-#endif
+ if (IS_BUILTIN(CONFIG_BCM47XX) ||
+ cc->core->bus->hosttype == BCMA_HOSTTYPE_SOC)
+ chip->base = bus->num * BCMA_GPIO_MAX_PINS;
+ else
+ chip->base = -1;
err = bcma_gpio_irq_domain_init(cc);
if (err)