X-Git-Url: https://git.rohieb.name/openwrt.git/blobdiff_plain/aedeeb1874e872189927c3c73cc039a2eb250586..caef3702a97071de4d44b3d99dcabc14f200006c:/target/linux/brcm63xx/files/arch/mips/bcm63xx/gpio.c

diff --git a/target/linux/brcm63xx/files/arch/mips/bcm63xx/gpio.c b/target/linux/brcm63xx/files/arch/mips/bcm63xx/gpio.c
index 2c203a69e..53e46641a 100644
--- a/target/linux/brcm63xx/files/arch/mips/bcm63xx/gpio.c
+++ b/target/linux/brcm63xx/files/arch/mips/bcm63xx/gpio.c
@@ -4,54 +4,59 @@
  * 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);
+static u32 gpio_out_low, gpio_out_high;
 
-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;
+	u32 *v;
 	unsigned long flags;
 
-	if (gpio >= BCM63XX_GPIO_COUNT)
+	if (gpio >= chip->ngpio)
 		BUG();
 
 	if (gpio < 32) {
 		reg = GPIO_DATA_LO_REG;
 		mask = 1 << gpio;
+		v = &gpio_out_low;
 	} else {
 		reg = GPIO_DATA_HI_REG;
 		mask = 1 << (gpio - 32);
+		v = &gpio_out_high;
 	}
 
 	spin_lock_irqsave(&bcm63xx_gpio_lock, flags);
-	tmp = bcm_gpio_readl(reg);
 	if (val)
-		tmp |= mask;
+		*v |= mask;
 	else
-		tmp &= ~mask;
-	bcm_gpio_writel(tmp, reg);
+		*v &= ~mask;
+	bcm_gpio_writel(*v, reg);
 	spin_unlock_irqrestore(&bcm63xx_gpio_lock, 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 +70,15 @@ 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) {
@@ -93,6 +97,35 @@ void bcm63xx_gpio_set_direction(int gpio, int dir)
 		tmp |= mask;
 	bcm_gpio_writel(tmp, reg);
 	spin_unlock_irqrestore(&bcm63xx_gpio_lock, 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,
+};
+
+int __init bcm63xx_gpio_init(void)
+{
+	bcm63xx_gpio_chip.ngpio = bcm63xx_gpio_count();
+	printk(KERN_INFO "registering %d GPIOs\n", bcm63xx_gpio_chip.ngpio);
+	return gpiochip_add(&bcm63xx_gpio_chip);
+}