#include <linux/gpio.h>
#include <linux/export.h>
#include <linux/platform_device.h>
+#include <linux/bitops.h>
+#include <linux/io.h>
#define IOP3XX_N_GPIOS 8
static void __iomem *base;
#define IOP3XX_GPIO_REG(reg) (base + (reg))
-#define IOP3XX_GPOE (volatile u32 *)IOP3XX_GPIO_REG(0x0000)
-#define IOP3XX_GPID (volatile u32 *)IOP3XX_GPIO_REG(0x0004)
-#define IOP3XX_GPOD (volatile u32 *)IOP3XX_GPIO_REG(0x0008)
+#define IOP3XX_GPOE IOP3XX_GPIO_REG(0x0000)
+#define IOP3XX_GPID IOP3XX_GPIO_REG(0x0004)
+#define IOP3XX_GPOD IOP3XX_GPIO_REG(0x0008)
static void gpio_line_config(int line, int direction)
{
unsigned long flags;
+ u32 val;
local_irq_save(flags);
+ val = readl(IOP3XX_GPOE);
if (direction == GPIO_IN) {
- *IOP3XX_GPOE |= 1 << line;
+ val |= BIT(line);
} else if (direction == GPIO_OUT) {
- *IOP3XX_GPOE &= ~(1 << line);
+ val &= ~BIT(line);
}
+ writel(val, IOP3XX_GPOE);
local_irq_restore(flags);
}
static int gpio_line_get(int line)
{
- return !!(*IOP3XX_GPID & (1 << line));
+ return !!(readl(IOP3XX_GPID) & BIT(line));
}
static void gpio_line_set(int line, int value)
{
unsigned long flags;
+ u32 val;
local_irq_save(flags);
+ val = readl(IOP3XX_GPOD);
if (value == GPIO_LOW) {
- *IOP3XX_GPOD &= ~(1 << line);
+ val &= ~BIT(line);
} else if (value == GPIO_HIGH) {
- *IOP3XX_GPOD |= 1 << line;
+ val |= BIT(line);
}
+ writel(val, IOP3XX_GPOD);
local_irq_restore(flags);
}