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authorShawn Guo <shawn.guo@linaro.org>2011-06-06 13:22:41 +0800
committerGrant Likely <grant.likely@secretlab.ca>2011-06-06 10:01:19 -0600
commit2ce420da39078a6135d1c004a0e4436fdc1458b4 (patch)
tree1f46faaf625ee24a996ad026f88b62ae02ddcda6 /drivers/gpio/gpio-mxc.c
parentb78d8e59a6f611e229fab8ec3014c58eba975000 (diff)
downloadop-kernel-dev-2ce420da39078a6135d1c004a0e4436fdc1458b4.zip
op-kernel-dev-2ce420da39078a6135d1c004a0e4436fdc1458b4.tar.gz
gpio/mxc: convert gpio-mxc to use basic_mmio_gpio library
The gpio-mxc controller complies with basic_mmio_gpio library. The patch convert the driver to use the library. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/gpio/gpio-mxc.c')
-rw-r--r--drivers/gpio/gpio-mxc.c83
1 files changed, 14 insertions, 69 deletions
diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c
index 844079a..b351952893 100644
--- a/drivers/gpio/gpio-mxc.c
+++ b/drivers/gpio/gpio-mxc.c
@@ -26,6 +26,7 @@
#include <linux/gpio.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
+#include <linux/basic_mmio_gpio.h>
#include <mach/hardware.h>
#include <asm-generic/bug.h>
@@ -35,9 +36,8 @@ struct mxc_gpio_port {
int irq;
int irq_high;
int virtual_irq_start;
- struct gpio_chip chip;
+ struct bgpio_chip bgc;
u32 both_edges;
- spinlock_t lock;
};
/*
@@ -101,8 +101,6 @@ static void gpio_unmask_irq(struct irq_data *d)
_set_gpio_irqenable(port, gpio & 0x1f, 1);
}
-static int mxc_gpio_get(struct gpio_chip *chip, unsigned offset);
-
static int gpio_set_irq_type(struct irq_data *d, u32 type)
{
u32 gpio = irq_to_gpio(d->irq);
@@ -120,7 +118,7 @@ static int gpio_set_irq_type(struct irq_data *d, u32 type)
edge = GPIO_INT_FALL_EDGE;
break;
case IRQ_TYPE_EDGE_BOTH:
- val = mxc_gpio_get(&port->chip, gpio & 31);
+ val = gpio_get_value(gpio & 31);
if (val) {
edge = GPIO_INT_LOW_LEV;
pr_debug("mxc: set GPIO %d to low trigger\n", gpio);
@@ -259,60 +257,6 @@ static struct irq_chip gpio_irq_chip = {
.irq_set_wake = gpio_set_wake_irq,
};
-static void _set_gpio_direction(struct gpio_chip *chip, unsigned offset,
- int dir)
-{
- struct mxc_gpio_port *port =
- container_of(chip, struct mxc_gpio_port, chip);
- u32 l;
- unsigned long flags;
-
- spin_lock_irqsave(&port->lock, flags);
- l = readl(port->base + GPIO_GDIR);
- if (dir)
- l |= 1 << offset;
- else
- l &= ~(1 << offset);
- writel(l, port->base + GPIO_GDIR);
- spin_unlock_irqrestore(&port->lock, flags);
-}
-
-static void mxc_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
-{
- struct mxc_gpio_port *port =
- container_of(chip, struct mxc_gpio_port, chip);
- void __iomem *reg = port->base + GPIO_DR;
- u32 l;
- unsigned long flags;
-
- spin_lock_irqsave(&port->lock, flags);
- l = (readl(reg) & (~(1 << offset))) | (!!value << offset);
- writel(l, reg);
- spin_unlock_irqrestore(&port->lock, flags);
-}
-
-static int mxc_gpio_get(struct gpio_chip *chip, unsigned offset)
-{
- struct mxc_gpio_port *port =
- container_of(chip, struct mxc_gpio_port, chip);
-
- return (readl(port->base + GPIO_PSR) >> offset) & 1;
-}
-
-static int mxc_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
-{
- _set_gpio_direction(chip, offset, 0);
- return 0;
-}
-
-static int mxc_gpio_direction_output(struct gpio_chip *chip,
- unsigned offset, int value)
-{
- mxc_gpio_set(chip, offset, value);
- _set_gpio_direction(chip, offset, 1);
- return 0;
-}
-
/*
* This lock class tells lockdep that GPIO irqs are in a different
* category than their parents, so it won't report false recursion.
@@ -385,24 +329,25 @@ static int __devinit mxc_gpio_probe(struct platform_device *pdev)
}
}
- /* register gpio chip */
- port->chip.direction_input = mxc_gpio_direction_input;
- port->chip.direction_output = mxc_gpio_direction_output;
- port->chip.get = mxc_gpio_get;
- port->chip.set = mxc_gpio_set;
- port->chip.base = pdev->id * 32;
- port->chip.ngpio = 32;
+ err = bgpio_init(&port->bgc, &pdev->dev, 4,
+ port->base + GPIO_PSR,
+ port->base + GPIO_DR, NULL,
+ port->base + GPIO_GDIR, NULL, false);
+ if (err)
+ goto out_iounmap;
- spin_lock_init(&port->lock);
+ port->bgc.gc.base = pdev->id * 32;
- err = gpiochip_add(&port->chip);
+ err = gpiochip_add(&port->bgc.gc);
if (err)
- goto out_iounmap;
+ goto out_bgpio_remove;
list_add_tail(&port->node, &mxc_gpio_ports);
return 0;
+out_bgpio_remove:
+ bgpio_remove(&port->bgc);
out_iounmap:
iounmap(port->base);
out_release_mem:
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