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[rdc] convert gpio code to use gpiolib, make rdc321x:dmz led work again

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@18754 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
florian
2009-12-11 19:32:52 +00:00
parent 4619273d77
commit 51528b3785
5 changed files with 44 additions and 122 deletions
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106
target/linux/rdc/files-2.6.30/arch/x86/mach-rdc321x/gpio.c
View File

@@ -25,6 +25,7 @@
#include <linux/io.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/gpio.h>
#include <asm/rdc321x_gpio.h>
#include <asm/rdc321x_defs.h>
@@ -38,9 +39,6 @@ static DEFINE_SPINLOCK(gpio_lock);
static u32 gpio_data_reg1;
static u32 gpio_data_reg2;
static u32 gpio_request_data[2];
static inline void rdc321x_conf_write(unsigned addr, u32 value)
{
outl((1 << 31) | (7 << 11) | addr, RDC3210_CFGREG_ADDR);
@@ -73,63 +71,8 @@ static void rdc321x_configure_gpio(unsigned gpio)
spin_unlock_irqrestore(&gpio_lock, flags);
}
/* initially setup the 2 copies of the gpio data registers.
This function is called before the platform setup code. */
static int __init rdc321x_gpio_setup(void)
{
/* this might not be, what others (BIOS, bootloader, etc.)
wrote to these registers before, but it's a good guess. Still
better than just using 0xffffffff. */
gpio_data_reg1 = rdc321x_conf_read(RDC321X_GPIO_DATA_REG1);
gpio_data_reg2 = rdc321x_conf_read(RDC321X_GPIO_DATA_REG2);
return 0;
}
/* determine, if gpio number is valid */
static inline int rdc321x_is_gpio(unsigned gpio)
{
return gpio <= RDC321X_MAX_GPIO;
}
/* request GPIO */
int rdc_gpio_request(unsigned gpio, const char *label)
{
unsigned long flags;
if (!rdc321x_is_gpio(gpio))
return -EINVAL;
spin_lock_irqsave(&gpio_lock, flags);
if (gpio_request_data[(gpio & 0x20) ? 1 : 0] & (1 << (gpio & 0x1f)))
goto inuse;
gpio_request_data[(gpio & 0x20) ? 1 : 0] |= (1 << (gpio & 0x1f));
spin_unlock_irqrestore(&gpio_lock, flags);
return 0;
inuse:
spin_unlock_irqrestore(&gpio_lock, flags);
return -EINVAL;
}
EXPORT_SYMBOL(rdc_gpio_request);
/* release previously-claimed GPIO */
void rdc_gpio_free(unsigned gpio)
{
unsigned long flags;
if (!rdc321x_is_gpio(gpio))
return;
spin_lock_irqsave(&gpio_lock, flags);
gpio_request_data[(gpio & 0x20) ? 1 : 0] &= ~(1 << (gpio & 0x1f));
spin_unlock_irqrestore(&gpio_lock, flags);
}
EXPORT_SYMBOL(rdc_gpio_free);
/* read GPIO pin */
int rdc_gpio_get_value(unsigned gpio)
static int rdc_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
{
u32 reg;
unsigned long flags;
@@ -141,10 +84,10 @@ int rdc_gpio_get_value(unsigned gpio)
return (1 << (gpio & 0x1f)) & reg ? 1 : 0;
}
EXPORT_SYMBOL(rdc_gpio_get_value);
/* set GPIO pin to value */
void rdc_gpio_set_value(unsigned gpio, int value)
static void rdc_gpio_set_value(struct gpio_chip *chip,
unsigned gpio, int value)
{
unsigned long flags;
u32 reg;
@@ -168,31 +111,48 @@ void rdc_gpio_set_value(unsigned gpio, int value)
spin_unlock_irqrestore(&gpio_lock, flags);
}
}
EXPORT_SYMBOL(rdc_gpio_set_value);
/* configure GPIO pin as input */
int rdc_gpio_direction_input(unsigned gpio)
static int rdc_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
{
if (!rdc321x_is_gpio(gpio))
return -EINVAL;
rdc321x_configure_gpio(gpio);
return 0;
}
EXPORT_SYMBOL(rdc_gpio_direction_input);
/* configure GPIO pin as output and set value */
int rdc_gpio_direction_output(unsigned gpio, int value)
static int rdc_gpio_direction_output(struct gpio_chip *chip,
unsigned gpio, int value)
{
if (!rdc321x_is_gpio(gpio))
return -EINVAL;
gpio_set_value(gpio, value);
rdc321x_configure_gpio(gpio);
gpio_set_value(gpio, value);
return 0;
}
EXPORT_SYMBOL(rdc_gpio_direction_output);
static struct gpio_chip rdc321x_gpio_chip = {
.label = "rdc321x-gpio",
.direction_input = rdc_gpio_direction_input,
.direction_output = rdc_gpio_direction_output,
.get = rdc_gpio_get_value,
.set = rdc_gpio_set_value,
.base = 0,
.ngpio = RDC321X_MAX_GPIO,
};
/* initially setup the 2 copies of the gpio data registers.
This function is called before the platform setup code. */
static int __init rdc321x_gpio_setup(void)
{
/* this might not be, what others (BIOS, bootloader, etc.)
wrote to these registers before, but it's a good guess. Still
better than just using 0xffffffff. */
gpio_data_reg1 = rdc321x_conf_read(RDC321X_GPIO_DATA_REG1);
gpio_data_reg2 = rdc321x_conf_read(RDC321X_GPIO_DATA_REG2);
printk(KERN_INFO "rdc321x: registering %d GPIOs\n", rdc321x_gpio_chip.ngpio);
return gpiochip_add(&rdc321x_gpio_chip);
}
arch_initcall(rdc321x_gpio_setup);