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mfd/gpio: add a GPIO interface to the UCB1400 MFD chip driver via gpiolib

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Cc: Eric Miao <eric.y.miao@gmail.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: David Brownell <david-b@pacbell.net>
Cc: Samuel Ortiz <sameo@openedhand.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Marek Vasut
2009-09-22 16:46:35 -07:00
committed by Linus Torvalds
parent 1e5db00687
commit 4cf8e53b3b
5 changed files with 184 additions and 4 deletions
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19
include/linux/ucb1400.h
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@@ -26,6 +26,7 @@
#include <sound/ac97_codec.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
/*
* UCB1400 AC-link registers
@@ -82,6 +83,17 @@
#define UCB_ID 0x7e
#define UCB_ID_1400 0x4304
struct ucb1400_gpio_data {
int gpio_offset;
int (*gpio_setup)(struct device *dev, int ngpio);
int (*gpio_teardown)(struct device *dev, int ngpio);
};
struct ucb1400_gpio {
struct gpio_chip gc;
struct snd_ac97 *ac97;
};
struct ucb1400_ts {
struct input_dev *ts_idev;
struct task_struct *ts_task;
@@ -95,6 +107,7 @@ struct ucb1400_ts {
struct ucb1400 {
struct platform_device *ucb1400_ts;
struct platform_device *ucb1400_gpio;
};
static inline u16 ucb1400_reg_read(struct snd_ac97 *ac97, u16 reg)
@@ -147,4 +160,10 @@ static inline void ucb1400_adc_disable(struct snd_ac97 *ac97)
unsigned int ucb1400_adc_read(struct snd_ac97 *ac97, u16 adc_channel,
int adcsync);
#ifdef CONFIG_GPIO_UCB1400
void __init ucb1400_gpio_set_data(struct ucb1400_gpio_data *data);
#else
static inline void ucb1400_gpio_set_data(struct ucb1400_gpio_data *data) {}
#endif
#endif