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Commit changes on the files for gpiolib

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SVN-Revision: 13374
This commit is contained in:
Florian Fainelli 2008-11-27 10:38:36 +00:00
parent 36fc2d1f93
commit 44108d6a2d
3 changed files with 53 additions and 62 deletions
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64
target/linux/brcm63xx/files/arch/mips/bcm63xx/gpio.c
View file

@ -4,26 +4,29 @@
* for more details.
*
* Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
* Copyright (C) 2008 Florian Fainelli <florian@openwrt.org>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <bcm63xx_cpu.h>
#include <bcm63xx_gpio.h>
#include <bcm63xx_io.h>
#include <bcm63xx_regs.h>
static DEFINE_SPINLOCK(bcm63xx_gpio_lock);
void bcm63xx_gpio_set_dataout(int gpio, int val)
static void bcm63xx_gpio_set(struct gpio_chip *chip,
unsigned gpio, int val)
{
u32 reg;
u32 mask;
u32 tmp;
unsigned long flags;
if (gpio >= BCM63XX_GPIO_COUNT)
if (gpio >= chip->ngpio)
BUG();
if (gpio < 32) {
@ -34,24 +37,22 @@ void bcm63xx_gpio_set_dataout(int gpio, int val)
mask = 1 << (gpio - 32);
}
spin_lock_irqsave(&bcm63xx_gpio_lock, flags);
local_irq_save(flags);
tmp = bcm_gpio_readl(reg);
if (val)
tmp |= mask;
else
tmp &= ~mask;
bcm_gpio_writel(tmp, reg);
spin_unlock_irqrestore(&bcm63xx_gpio_lock, flags);
local_irq_restore(flags);
}
EXPORT_SYMBOL(bcm63xx_gpio_set_dataout);
int bcm63xx_gpio_get_datain(int gpio)
static int bcm63xx_gpio_get(struct gpio_chip *chip, unsigned gpio)
{
u32 reg;
u32 mask;
if (gpio >= BCM63XX_GPIO_COUNT)
if (gpio >= chip->ngpio)
BUG();
if (gpio < 32) {
@ -65,16 +66,15 @@ int bcm63xx_gpio_get_datain(int gpio)
return !!(bcm_gpio_readl(reg) & mask);
}
EXPORT_SYMBOL(bcm63xx_gpio_get_datain);
void bcm63xx_gpio_set_direction(int gpio, int dir)
static int bcm63xx_gpio_set_direction(struct gpio_chip *chip,
unsigned gpio, int dir)
{
u32 reg;
u32 mask;
u32 tmp;
unsigned long flags;
if (gpio >= BCM63XX_GPIO_COUNT)
if (gpio >= chip->ngpio)
BUG();
if (gpio < 32) {
@ -85,14 +85,44 @@ void bcm63xx_gpio_set_direction(int gpio, int dir)
mask = 1 << (gpio - 32);
}
spin_lock_irqsave(&bcm63xx_gpio_lock, flags);
local_irq_save(flags);
tmp = bcm_gpio_readl(reg);
if (dir == GPIO_DIR_IN)
tmp &= ~mask;
else
tmp |= mask;
bcm_gpio_writel(tmp, reg);
spin_unlock_irqrestore(&bcm63xx_gpio_lock, flags);
local_irq_restore(flags);
return 0;
}
EXPORT_SYMBOL(bcm63xx_gpio_set_direction);
static int bcm63xx_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
{
return bcm63xx_gpio_set_direction(chip, gpio, GPIO_DIR_IN);
}
static int bcm63xx_gpio_direction_output(struct gpio_chip *chip,
unsigned gpio, int value)
{
bcm63xx_gpio_set(chip, gpio, value);
return bcm63xx_gpio_set_direction(chip, gpio, GPIO_DIR_OUT);
}
static struct gpio_chip bcm63xx_gpio_chip = {
.label = "bcm63xx-gpio",
.direction_input = bcm63xx_gpio_direction_input,
.direction_output = bcm63xx_gpio_direction_output,
.get = bcm63xx_gpio_get,
.set = bcm63xx_gpio_set,
.base = 0,
.ngpio = BCM63XX_GPIO_COUNT,
};
static int __init bcm63xx_gpio_init(void)
{
printk(KERN_INFO "registering %d GPIOs\n", BCM63XX_GPIO_COUNT);
return gpiochip_add(&bcm63xx_gpio_chip);
}
arch_initcall(bcm63xx_gpio_init);

4
target/linux/brcm63xx/files/include/asm-mips/mach-bcm63xx/bcm63xx_gpio.h
View file

@ -4,10 +4,6 @@
/* all helpers will BUG() if gpio count is >= 37. */
#define BCM63XX_GPIO_COUNT 37
void bcm63xx_gpio_set_dataout(int gpio, int val);
int bcm63xx_gpio_get_datain(int gpio);
void bcm63xx_gpio_set_direction(int gpio, int dir);
#define GPIO_DIR_OUT 0x0
#define GPIO_DIR_IN 0x1

47
target/linux/brcm63xx/files/include/asm-mips/mach-bcm63xx/gpio.h
View file

@ -3,50 +3,15 @@
#include <bcm63xx_gpio.h>
static inline int gpio_is_valid(int number)
{
return (number >= BCM63XX_GPIO_COUNT) ? 0 : 1;
}
#define NR_BUILTIN_GPIO BCM63XX_GPIO_COUNT
static inline int gpio_request(unsigned gpio, const char *label)
{
return 0;
}
#define gpio_to_irq(gpio) NULL
static inline void gpio_free(unsigned gpio)
{
}
#define gpio_get_value __gpio_get_value
#define gpio_set_value __gpio_set_value
static inline int gpio_direction_input(unsigned gpio)
{
bcm63xx_gpio_set_direction(gpio, GPIO_DIR_IN);
return 0;
}
#define gpio_cansleep __gpio_cansleep
static inline int gpio_direction_output(unsigned gpio, int value)
{
bcm63xx_gpio_set_direction(gpio, GPIO_DIR_OUT);
return 0;
}
static inline int gpio_get_value(unsigned gpio)
{
return bcm63xx_gpio_get_datain(gpio);
}
static inline void gpio_set_value(unsigned gpio, int value)
{
bcm63xx_gpio_set_dataout(gpio, value);
}
static inline int gpio_to_irq(unsigned gpio)
{
return gpio;
}
static inline int irq_to_gpio(unsigned irq)
{
return irq;
}
#include <asm-generic/gpio.h>
#endif /* __ASM_MIPS_MACH_BCM63XX_GPIO_H */