FEX-Emu/linux
1
0
Fork 0
mirror of https://github.com/FEX-Emu/linux.git synced 2024-12-26 11:28:28 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

bcma: use absolute base for SoC GPIO pins

Browse Source 
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>
This commit is contained in:
Felix Fietkau 2015-04-15 15:07:52 +02:00 committed by Kalle Valo
parent c436553452
commit 2d57b7126d
1 changed files with 10 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/bcma/driver_gpio.c
View File

@ -235,16 +235,17 @@ int bcma_gpio_init(struct bcma_drv_cc *cc)
} }
/* /*
* On MIPS we register GPIO devices (LEDs, buttons) using absolute GPIO * Register SoC GPIO devices with absolute GPIO pin base.
* pin numbers. We don't have Device Tree there and we can't really use * On MIPS, we don't have Device Tree and we can't use relative (per chip)
* relative (per chip) numbers. * GPIO numbers.
* So let's use predictable base for BCM47XX and "random" for all other. * 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) if (IS_BUILTIN(CONFIG_BCM47XX) ||
cc->core->bus->hosttype == BCMA_HOSTTYPE_SOC)
chip->base = bus->num * BCMA_GPIO_MAX_PINS; chip->base = bus->num * BCMA_GPIO_MAX_PINS;
#else else
chip->base = -1; chip->base = -1;
#endif
err = bcma_gpio_irq_domain_init(cc); err = bcma_gpio_irq_domain_init(cc);
if (err) if (err)