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mfd: asic3 gpiolib support

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ASIC3 is, among other things, a GPIO extender. We should thus have it
supporting the current gpiolib API.

Signed-off-by: Samuel Ortiz <sameo@openedhand.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Samuel Ortiz 2008-06-20 11:02:19 +02:00 • committed by Samuel Ortiz
parent 5b664cb235
commit 6f2384c4bd
2 changed files with 164 additions and 84 deletions
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24
include/linux/mfd/asic3.h
View file

@ -16,16 +16,6 @@
#include <linux/types.h>
struct asic3 {
void __iomem *mapping;
unsigned int bus_shift;
unsigned int irq_nr;
unsigned int irq_base;
spinlock_t lock;
u16 irq_bothedge[4];
struct device *dev;
};
struct asic3_platform_data {
struct {
u32 dir;
@ -41,18 +31,19 @@ struct asic3_platform_data {
unsigned int irq_base;
unsigned int gpio_base;
struct platform_device **children;
unsigned int n_children;
};
int asic3_gpio_get_value(struct asic3 *asic, unsigned gpio);
void asic3_gpio_set_value(struct asic3 *asic, unsigned gpio, int val);
#define ASIC3_NUM_GPIO_BANKS 4
#define ASIC3_GPIOS_PER_BANK 16
#define ASIC3_NUM_GPIOS 64
#define ASIC3_NR_IRQS ASIC3_NUM_GPIOS + 6
#define ASIC3_TO_GPIO(gpio) (NR_BUILTIN_GPIO + (gpio))
#define ASIC3_GPIO_BANK_A 0
#define ASIC3_GPIO_BANK_B 1
#define ASIC3_GPIO_BANK_C 2
@ -73,6 +64,13 @@ void asic3_gpio_set_value(struct asic3 *asic, unsigned gpio, int val);
#define ASIC3_GPIO_C_Base 0x0200
#define ASIC3_GPIO_D_Base 0x0300
#define ASIC3_GPIO_TO_BANK(gpio) ((gpio) >> 4)
#define ASIC3_GPIO_TO_BIT(gpio) ((gpio) - \
(ASIC3_GPIOS_PER_BANK * ((gpio) >> 4)))
#define ASIC3_GPIO_TO_MASK(gpio) (1 << ASIC3_GPIO_TO_BIT(gpio))
#define ASIC3_GPIO_TO_BASE(gpio) (ASIC3_GPIO_A_Base + (((gpio) >> 4) * 0x0100))
#define ASIC3_BANK_TO_BASE(bank) (ASIC3_GPIO_A_Base + ((bank) * 0x100))
#define ASIC3_GPIO_Mask 0x00 /* R/W 0:don't mask */
#define ASIC3_GPIO_Direction 0x04 /* R/W 0:input */
#define ASIC3_GPIO_Out 0x08 /* R/W 0:output low */