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bcma: gpio: use predictable base for all BCM47XX buses

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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>
This commit is contained in:
Rafał Miłecki 2015-03-15 19:43:14 +01:00 • committed by Kalle Valo
parent 080465f27a
commit 057fcd426e
1 changed files with 15 additions and 8 deletions
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23
drivers/bcma/driver_gpio.c
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@ -17,6 +17,8 @@
#include "bcma_private.h" #include "bcma_private.h"
#define BCMA_GPIO_MAX_PINS 32
static inline struct bcma_drv_cc *bcma_gpio_get_cc(struct gpio_chip *chip) static inline struct bcma_drv_cc *bcma_gpio_get_cc(struct gpio_chip *chip)
{ {
return container_of(chip, struct bcma_drv_cc, gpio); 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) int bcma_gpio_init(struct bcma_drv_cc *cc)
{ {
struct bcma_bus *bus = cc->core->bus;
struct gpio_chip *chip = &cc->gpio; struct gpio_chip *chip = &cc->gpio;
int err; int err;
@ -222,7 +225,7 @@ int bcma_gpio_init(struct bcma_drv_cc *cc)
if (cc->core->bus->hosttype == BCMA_HOSTTYPE_SOC) if (cc->core->bus->hosttype == BCMA_HOSTTYPE_SOC)
chip->of_node = cc->core->dev.of_node; chip->of_node = cc->core->dev.of_node;
#endif #endif
switch (cc->core->bus->chipinfo.id) { switch (bus->chipinfo.id) {
case BCMA_CHIP_ID_BCM5357: case BCMA_CHIP_ID_BCM5357:
case BCMA_CHIP_ID_BCM53572: case BCMA_CHIP_ID_BCM53572:
chip->ngpio = 32; chip->ngpio = 32;
@ -231,13 +234,17 @@ int bcma_gpio_init(struct bcma_drv_cc *cc)
chip->ngpio = 16; 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 * On MIPS we register GPIO devices (LEDs, buttons) using absolute GPIO
* a random base number. */ * pin numbers. We don't have Device Tree there and we can't really use
if (cc->core->bus->hosttype == BCMA_HOSTTYPE_SOC) * relative (per chip) numbers.
chip->base = 0; * So let's use predictable base for BCM47XX and "random" for all other.
else */
chip->base = -1; #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); err = bcma_gpio_irq_domain_init(cc);
if (err) if (err)