diff options
| author | Rafał Miłecki <zajec5@gmail.com> | 2015-03-15 19:43:14 +0100 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2015-03-20 09:08:56 +0200 |
| commit | 057fcd426e146d0603b7320ea22b8caa24f83b0a (patch) | |
| tree | 569c0e02ee6e8d98c9feded0c9fc2c0343e19e5b /drivers/bcma/driver_gpio.c | |
| parent | 080465f27aca1315cf882297cf31a376452fa188 (diff) | |
| download | linux-057fcd426e146d0603b7320ea22b8caa24f83b0a.tar.bz2 | |
bcma: gpio: use predictable base for all BCM47XX buses
Some BCM47XX SoC routers have LEDs connected to extra PCIe bcma buses.
Handling them in arch code requires predictable GPIO numbers.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/bcma/driver_gpio.c')
| -rw-r--r-- | drivers/bcma/driver_gpio.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/drivers/bcma/driver_gpio.c b/drivers/bcma/driver_gpio.c index dce34fb52e27..74ccb02e0f10 100644 --- a/drivers/bcma/driver_gpio.c +++ b/drivers/bcma/driver_gpio.c @@ -17,6 +17,8 @@ #include "bcma_private.h" +#define BCMA_GPIO_MAX_PINS 32 + static inline struct bcma_drv_cc *bcma_gpio_get_cc(struct gpio_chip *chip) { return container_of(chip, struct bcma_drv_cc, gpio); @@ -204,6 +206,7 @@ static void bcma_gpio_irq_domain_exit(struct bcma_drv_cc *cc) int bcma_gpio_init(struct bcma_drv_cc *cc) { + struct bcma_bus *bus = cc->core->bus; struct gpio_chip *chip = &cc->gpio; int err; @@ -222,7 +225,7 @@ int bcma_gpio_init(struct bcma_drv_cc *cc) if (cc->core->bus->hosttype == BCMA_HOSTTYPE_SOC) chip->of_node = cc->core->dev.of_node; #endif - switch (cc->core->bus->chipinfo.id) { + switch (bus->chipinfo.id) { case BCMA_CHIP_ID_BCM5357: case BCMA_CHIP_ID_BCM53572: chip->ngpio = 32; @@ -231,13 +234,17 @@ int bcma_gpio_init(struct bcma_drv_cc *cc) chip->ngpio = 16; } - /* There is just one SoC in one device and its GPIO addresses should be - * deterministic to address them more easily. The other buses could get - * a random base number. */ - if (cc->core->bus->hosttype == BCMA_HOSTTYPE_SOC) - chip->base = 0; - else - chip->base = -1; + /* + * 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. + */ +#if IS_BUILTIN(CONFIG_BCM47XX) + chip->base = bus->num * BCMA_GPIO_MAX_PINS; +#else + chip->base = -1; +#endif err = bcma_gpio_irq_domain_init(cc); if (err) |