forked from luck/tmp_suning_uos_patched
fd5023111c
Synchronize with 'net' in order to sort out some l2tp, wireless, and ipv6 GRE fixes that will be built on top of in 'net-next'. Signed-off-by: David S. Miller <davem@davemloft.net>
115 lines
2.8 KiB
C
115 lines
2.8 KiB
C
/*
|
|
* Broadcom specific AMBA
|
|
* GPIO driver
|
|
*
|
|
* Copyright 2011, Broadcom Corporation
|
|
* Copyright 2012, Hauke Mehrtens <hauke@hauke-m.de>
|
|
*
|
|
* Licensed under the GNU/GPL. See COPYING for details.
|
|
*/
|
|
|
|
#include <linux/gpio.h>
|
|
#include <linux/export.h>
|
|
#include <linux/bcma/bcma.h>
|
|
|
|
#include "bcma_private.h"
|
|
|
|
static inline struct bcma_drv_cc *bcma_gpio_get_cc(struct gpio_chip *chip)
|
|
{
|
|
return container_of(chip, struct bcma_drv_cc, gpio);
|
|
}
|
|
|
|
static int bcma_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
|
|
{
|
|
struct bcma_drv_cc *cc = bcma_gpio_get_cc(chip);
|
|
|
|
return !!bcma_chipco_gpio_in(cc, 1 << gpio);
|
|
}
|
|
|
|
static void bcma_gpio_set_value(struct gpio_chip *chip, unsigned gpio,
|
|
int value)
|
|
{
|
|
struct bcma_drv_cc *cc = bcma_gpio_get_cc(chip);
|
|
|
|
bcma_chipco_gpio_out(cc, 1 << gpio, value ? 1 << gpio : 0);
|
|
}
|
|
|
|
static int bcma_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
|
|
{
|
|
struct bcma_drv_cc *cc = bcma_gpio_get_cc(chip);
|
|
|
|
bcma_chipco_gpio_outen(cc, 1 << gpio, 0);
|
|
return 0;
|
|
}
|
|
|
|
static int bcma_gpio_direction_output(struct gpio_chip *chip, unsigned gpio,
|
|
int value)
|
|
{
|
|
struct bcma_drv_cc *cc = bcma_gpio_get_cc(chip);
|
|
|
|
bcma_chipco_gpio_outen(cc, 1 << gpio, 1 << gpio);
|
|
bcma_chipco_gpio_out(cc, 1 << gpio, value ? 1 << gpio : 0);
|
|
return 0;
|
|
}
|
|
|
|
static int bcma_gpio_request(struct gpio_chip *chip, unsigned gpio)
|
|
{
|
|
struct bcma_drv_cc *cc = bcma_gpio_get_cc(chip);
|
|
|
|
bcma_chipco_gpio_control(cc, 1 << gpio, 0);
|
|
/* clear pulldown */
|
|
bcma_chipco_gpio_pulldown(cc, 1 << gpio, 0);
|
|
/* Set pullup */
|
|
bcma_chipco_gpio_pullup(cc, 1 << gpio, 1 << gpio);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void bcma_gpio_free(struct gpio_chip *chip, unsigned gpio)
|
|
{
|
|
struct bcma_drv_cc *cc = bcma_gpio_get_cc(chip);
|
|
|
|
/* clear pullup */
|
|
bcma_chipco_gpio_pullup(cc, 1 << gpio, 0);
|
|
}
|
|
|
|
static int bcma_gpio_to_irq(struct gpio_chip *chip, unsigned gpio)
|
|
{
|
|
struct bcma_drv_cc *cc = bcma_gpio_get_cc(chip);
|
|
|
|
if (cc->core->bus->hosttype == BCMA_HOSTTYPE_SOC)
|
|
return bcma_core_irq(cc->core);
|
|
else
|
|
return -EINVAL;
|
|
}
|
|
|
|
int bcma_gpio_init(struct bcma_drv_cc *cc)
|
|
{
|
|
struct gpio_chip *chip = &cc->gpio;
|
|
|
|
chip->label = "bcma_gpio";
|
|
chip->owner = THIS_MODULE;
|
|
chip->request = bcma_gpio_request;
|
|
chip->free = bcma_gpio_free;
|
|
chip->get = bcma_gpio_get_value;
|
|
chip->set = bcma_gpio_set_value;
|
|
chip->direction_input = bcma_gpio_direction_input;
|
|
chip->direction_output = bcma_gpio_direction_output;
|
|
chip->to_irq = bcma_gpio_to_irq;
|
|
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;
|
|
|
|
return gpiochip_add(chip);
|
|
}
|
|
|
|
int bcma_gpio_unregister(struct bcma_drv_cc *cc)
|
|
{
|
|
return gpiochip_remove(&cc->gpio);
|
|
}
|