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ssb: add GPIO driver

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Register a GPIO driver to access the GPIOs provided by the chip.
The GPIOs of the SoC should always start at 0 and the other GPIOs could
start at a random position. There is just one SoC in a system and when
they start at 0 the number is predictable.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Patchwork: http://patchwork.linux-mips.org/patch/4591
Acked-by: Florian Fainelli <florian@openwrt.org>
This commit is contained in:
Hauke Mehrtens 2012-11-20 22:24:33 +00:00 • committed by John Crispin
parent 394bc7e38b
commit ec43b08b57
6 changed files with 205 additions and 0 deletions
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4
include/linux/ssb/ssb.h
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@ -6,6 +6,7 @@
#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/pci.h>
#include <linux/gpio.h>
#include <linux/mod_devicetable.h>
#include <linux/dma-mapping.h>
@ -433,6 +434,9 @@ struct ssb_bus {
/* Lock for GPIO register access. */
spinlock_t gpio_lock;
#endif /* EMBEDDED */
#ifdef CONFIG_SSB_DRIVER_GPIO
struct gpio_chip gpio;
#endif /* DRIVER_GPIO */
/* Internal-only stuff follows. Do not touch. */
struct list_head list;