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authorflorian <florian@3c298f89-4303-0410-b956-a3cf2f4a3e73>2008-11-27 10:38:36 +0000
committerflorian <florian@3c298f89-4303-0410-b956-a3cf2f4a3e73>2008-11-27 10:38:36 +0000
commitb7da6044662b62c5b0f8fded77ee85e63632fad1 (patch)
tree2f46c68e7a9c466a58e3100359cd173214f3a1e8 /target/linux/brcm63xx/files/arch
parent4ddb2a30a12f7d7bf64c49d4c3f43ac57dd354e5 (diff)
Commit changes on the files for gpiolib
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13374 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/brcm63xx/files/arch')
-rw-r--r--target/linux/brcm63xx/files/arch/mips/bcm63xx/gpio.c64
1 files changed, 47 insertions, 17 deletions
diff --git a/target/linux/brcm63xx/files/arch/mips/bcm63xx/gpio.c b/target/linux/brcm63xx/files/arch/mips/bcm63xx/gpio.c
index 2c203a69e..b78d3fdaf 100644
--- a/target/linux/brcm63xx/files/arch/mips/bcm63xx/gpio.c
+++ b/target/linux/brcm63xx/files/arch/mips/bcm63xx/gpio.c
@@ -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;
+}
+
+static int bcm63xx_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
+{
+ return bcm63xx_gpio_set_direction(chip, gpio, GPIO_DIR_IN);
}
-EXPORT_SYMBOL(bcm63xx_gpio_set_direction);
+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);