Commit 057fcd42 authored by Rafał Miłecki's avatar Rafał Miłecki Committed by Kalle Valo
Browse files

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: default avatarRafał Miłecki <zajec5@gmail.com>
Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
parent 080465f2

drivers/bcma/driver_gpio.c

+15 −8
Original line number Diff line number Diff line
@@ -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

	/*

	 * 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)