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Diffstat (limited to 'arch/arm/plat-omap/gpio.c')
-rw-r--r--arch/arm/plat-omap/gpio.c45
1 files changed, 33 insertions, 12 deletions
diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
index cd7f973..f55f99a 100644
--- a/arch/arm/plat-omap/gpio.c
+++ b/arch/arm/plat-omap/gpio.c
@@ -94,6 +94,8 @@
#define OMAP24XX_GPIO_SYSCONFIG 0x0010
#define OMAP24XX_GPIO_SYSSTATUS 0x0014
#define OMAP24XX_GPIO_IRQSTATUS1 0x0018
+#define OMAP24XX_GPIO_IRQSTATUS2 0x0028
+#define OMAP24XX_GPIO_IRQENABLE2 0x002c
#define OMAP24XX_GPIO_IRQENABLE1 0x001c
#define OMAP24XX_GPIO_CTRL 0x0030
#define OMAP24XX_GPIO_OE 0x0034
@@ -110,8 +112,6 @@
#define OMAP24XX_GPIO_CLEARDATAOUT 0x0090
#define OMAP24XX_GPIO_SETDATAOUT 0x0094
-#define OMAP_MPUIO_MASK (~OMAP_MAX_GPIO_LINES & 0xff)
-
struct gpio_bank {
void __iomem *base;
u16 irq;
@@ -216,11 +216,13 @@ static inline int gpio_valid(int gpio)
{
if (gpio < 0)
return -1;
+#ifndef CONFIG_ARCH_OMAP24XX
if (OMAP_GPIO_IS_MPUIO(gpio)) {
- if ((gpio & OMAP_MPUIO_MASK) > 16)
+ if (gpio >= OMAP_MAX_GPIO_LINES + 16)
return -1;
return 0;
}
+#endif
#ifdef CONFIG_ARCH_OMAP15XX
if (cpu_is_omap15xx() && gpio < 16)
return 0;
@@ -529,6 +531,10 @@ static void _clear_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
return;
}
__raw_writel(gpio_mask, reg);
+
+ /* Workaround for clearing DSP GPIO interrupts to allow retention */
+ if (cpu_is_omap2420())
+ __raw_writel(gpio_mask, bank->base + OMAP24XX_GPIO_IRQSTATUS2);
}
static inline void _clear_gpio_irqstatus(struct gpio_bank *bank, int gpio)
@@ -662,6 +668,14 @@ static int _set_gpio_wakeup(struct gpio_bank *bank, int gpio, int enable)
}
}
+static void _reset_gpio(struct gpio_bank *bank, int gpio)
+{
+ _set_gpio_direction(bank, get_gpio_index(gpio), 1);
+ _set_gpio_irqenable(bank, gpio, 0);
+ _clear_gpio_irqstatus(bank, gpio);
+ _set_gpio_triggering(bank, get_gpio_index(gpio), IRQT_NOEDGE);
+}
+
/* Use disable_irq_wake() and enable_irq_wake() functions from drivers */
static int gpio_wake_enable(unsigned int irq, unsigned int enable)
{
@@ -672,9 +686,7 @@ static int gpio_wake_enable(unsigned int irq, unsigned int enable)
if (check_gpio(gpio) < 0)
return -ENODEV;
bank = get_gpio_bank(gpio);
- spin_lock(&bank->lock);
retval = _set_gpio_wakeup(bank, get_gpio_index(gpio), enable);
- spin_unlock(&bank->lock);
return retval;
}
@@ -696,7 +708,9 @@ int omap_request_gpio(int gpio)
}
bank->reserved_map |= (1 << get_gpio_index(gpio));
- /* Set trigger to none. You need to enable the trigger after request_irq */
+ /* Set trigger to none. You need to enable the desired trigger with
+ * request_irq() or set_irq_type().
+ */
_set_gpio_triggering(bank, get_gpio_index(gpio), IRQT_NOEDGE);
#ifdef CONFIG_ARCH_OMAP15XX
@@ -756,9 +770,7 @@ void omap_free_gpio(int gpio)
}
#endif
bank->reserved_map &= ~(1 << get_gpio_index(gpio));
- _set_gpio_direction(bank, get_gpio_index(gpio), 1);
- _set_gpio_irqenable(bank, gpio, 0);
- _clear_gpio_irqstatus(bank, gpio);
+ _reset_gpio(bank, gpio);
spin_unlock(&bank->lock);
}
@@ -898,6 +910,14 @@ static void gpio_irq_handler(unsigned int irq, struct irqdesc *desc,
}
+static void gpio_irq_shutdown(unsigned int irq)
+{
+ unsigned int gpio = irq - IH_GPIO_BASE;
+ struct gpio_bank *bank = get_gpio_bank(gpio);
+
+ _reset_gpio(bank, gpio);
+}
+
static void gpio_ack_irq(unsigned int irq)
{
unsigned int gpio = irq - IH_GPIO_BASE;
@@ -946,6 +966,7 @@ static void mpuio_unmask_irq(unsigned int irq)
static struct irq_chip gpio_irq_chip = {
.name = "GPIO",
+ .shutdown = gpio_irq_shutdown,
.ack = gpio_ack_irq,
.mask = gpio_mask_irq,
.unmask = gpio_unmask_irq,
@@ -985,7 +1006,7 @@ static int __init _omap_gpio_init(void)
else
clk_enable(gpio_ick);
gpio_fck = clk_get(NULL, "gpios_fck");
- if (IS_ERR(gpio_ick))
+ if (IS_ERR(gpio_fck))
printk("Could not get gpios_fck\n");
else
clk_enable(gpio_fck);
@@ -1144,8 +1165,8 @@ static int omap_gpio_resume(struct sys_device *dev)
wake_set = bank->base + OMAP1610_GPIO_SET_WAKEUPENA;
break;
case METHOD_GPIO_24XX:
- wake_clear = bank->base + OMAP1610_GPIO_CLEAR_WAKEUPENA;
- wake_set = bank->base + OMAP1610_GPIO_SET_WAKEUPENA;
+ wake_clear = bank->base + OMAP24XX_GPIO_CLEARWKUENA;
+ wake_set = bank->base + OMAP24XX_GPIO_SETWKUENA;
break;
default:
continue;
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