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-rw-r--r--arch/arm/mach-ep93xx/gpio.c133
1 files changed, 64 insertions, 69 deletions
diff --git a/arch/arm/mach-ep93xx/gpio.c b/arch/arm/mach-ep93xx/gpio.c
index bec34b834958..a5a9ff70b198 100644
--- a/arch/arm/mach-ep93xx/gpio.c
+++ b/arch/arm/mach-ep93xx/gpio.c
@@ -61,7 +61,7 @@ static inline void ep93xx_gpio_int_mask(unsigned line)
gpio_int_unmasked[line >> 3] &= ~(1 << (line & 7));
}
-void ep93xx_gpio_int_debounce(unsigned int irq, int enable)
+static void ep93xx_gpio_int_debounce(unsigned int irq, bool enable)
{
int line = irq_to_gpio(irq);
int port = line >> 3;
@@ -75,7 +75,6 @@ void ep93xx_gpio_int_debounce(unsigned int irq, int enable)
__raw_writeb(gpio_int_debounce[port],
EP93XX_GPIO_REG(int_debounce_register_offset[port]));
}
-EXPORT_SYMBOL(ep93xx_gpio_int_debounce);
static void ep93xx_gpio_ab_irq_handler(unsigned int irq, struct irq_desc *desc)
{
@@ -102,7 +101,7 @@ static void ep93xx_gpio_ab_irq_handler(unsigned int irq, struct irq_desc *desc)
static void ep93xx_gpio_f_irq_handler(unsigned int irq, struct irq_desc *desc)
{
/*
- * map discontiguous hw irq range to continous sw irq range:
+ * map discontiguous hw irq range to continuous sw irq range:
*
* IRQ_EP93XX_GPIO{0..7}MUX -> gpio_to_irq(EP93XX_GPIO_LINE_F({0..7})
*/
@@ -118,7 +117,7 @@ static void ep93xx_gpio_irq_ack(struct irq_data *d)
int port = line >> 3;
int port_mask = 1 << (line & 7);
- if ((irq_desc[d->irq].status & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH) {
+ if (irqd_get_trigger_type(d) == IRQ_TYPE_EDGE_BOTH) {
gpio_int_type2[port] ^= port_mask; /* switch edge direction */
ep93xx_gpio_update_int_params(port);
}
@@ -132,7 +131,7 @@ static void ep93xx_gpio_irq_mask_ack(struct irq_data *d)
int port = line >> 3;
int port_mask = 1 << (line & 7);
- if ((irq_desc[d->irq].status & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH)
+ if (irqd_get_trigger_type(d) == IRQ_TYPE_EDGE_BOTH)
gpio_int_type2[port] ^= port_mask; /* switch edge direction */
gpio_int_unmasked[port] &= ~port_mask;
@@ -166,10 +165,10 @@ static void ep93xx_gpio_irq_unmask(struct irq_data *d)
*/
static int ep93xx_gpio_irq_type(struct irq_data *d, unsigned int type)
{
- struct irq_desc *desc = irq_desc + d->irq;
const int gpio = irq_to_gpio(d->irq);
const int port = gpio >> 3;
const int port_mask = 1 << (gpio & 7);
+ irq_flow_handler_t handler;
gpio_direction_input(gpio);
@@ -177,22 +176,22 @@ static int ep93xx_gpio_irq_type(struct irq_data *d, unsigned int type)
case IRQ_TYPE_EDGE_RISING:
gpio_int_type1[port] |= port_mask;
gpio_int_type2[port] |= port_mask;
- desc->handle_irq = handle_edge_irq;
+ handler = handle_edge_irq;
break;
case IRQ_TYPE_EDGE_FALLING:
gpio_int_type1[port] |= port_mask;
gpio_int_type2[port] &= ~port_mask;
- desc->handle_irq = handle_edge_irq;
+ handler = handle_edge_irq;
break;
case IRQ_TYPE_LEVEL_HIGH:
gpio_int_type1[port] &= ~port_mask;
gpio_int_type2[port] |= port_mask;
- desc->handle_irq = handle_level_irq;
+ handler = handle_level_irq;
break;
case IRQ_TYPE_LEVEL_LOW:
gpio_int_type1[port] &= ~port_mask;
gpio_int_type2[port] &= ~port_mask;
- desc->handle_irq = handle_level_irq;
+ handler = handle_level_irq;
break;
case IRQ_TYPE_EDGE_BOTH:
gpio_int_type1[port] |= port_mask;
@@ -201,17 +200,16 @@ static int ep93xx_gpio_irq_type(struct irq_data *d, unsigned int type)
gpio_int_type2[port] &= ~port_mask; /* falling */
else
gpio_int_type2[port] |= port_mask; /* rising */
- desc->handle_irq = handle_edge_irq;
+ handler = handle_edge_irq;
break;
default:
pr_err("failed to set irq type %d for gpio %d\n", type, gpio);
return -EINVAL;
}
- gpio_int_enabled[port] |= port_mask;
+ __irq_set_handler_locked(d->irq, handler);
- desc->status &= ~IRQ_TYPE_SENSE_MASK;
- desc->status |= type & IRQ_TYPE_SENSE_MASK;
+ gpio_int_enabled[port] |= port_mask;
ep93xx_gpio_update_int_params(port);
@@ -233,20 +231,29 @@ void __init ep93xx_gpio_init_irq(void)
for (gpio_irq = gpio_to_irq(0);
gpio_irq <= gpio_to_irq(EP93XX_GPIO_LINE_MAX_IRQ); ++gpio_irq) {
- set_irq_chip(gpio_irq, &ep93xx_gpio_irq_chip);
- set_irq_handler(gpio_irq, handle_level_irq);
+ irq_set_chip_and_handler(gpio_irq, &ep93xx_gpio_irq_chip,
+ handle_level_irq);
set_irq_flags(gpio_irq, IRQF_VALID);
}
- set_irq_chained_handler(IRQ_EP93XX_GPIO_AB, ep93xx_gpio_ab_irq_handler);
- set_irq_chained_handler(IRQ_EP93XX_GPIO0MUX, ep93xx_gpio_f_irq_handler);
- set_irq_chained_handler(IRQ_EP93XX_GPIO1MUX, ep93xx_gpio_f_irq_handler);
- set_irq_chained_handler(IRQ_EP93XX_GPIO2MUX, ep93xx_gpio_f_irq_handler);
- set_irq_chained_handler(IRQ_EP93XX_GPIO3MUX, ep93xx_gpio_f_irq_handler);
- set_irq_chained_handler(IRQ_EP93XX_GPIO4MUX, ep93xx_gpio_f_irq_handler);
- set_irq_chained_handler(IRQ_EP93XX_GPIO5MUX, ep93xx_gpio_f_irq_handler);
- set_irq_chained_handler(IRQ_EP93XX_GPIO6MUX, ep93xx_gpio_f_irq_handler);
- set_irq_chained_handler(IRQ_EP93XX_GPIO7MUX, ep93xx_gpio_f_irq_handler);
+ irq_set_chained_handler(IRQ_EP93XX_GPIO_AB,
+ ep93xx_gpio_ab_irq_handler);
+ irq_set_chained_handler(IRQ_EP93XX_GPIO0MUX,
+ ep93xx_gpio_f_irq_handler);
+ irq_set_chained_handler(IRQ_EP93XX_GPIO1MUX,
+ ep93xx_gpio_f_irq_handler);
+ irq_set_chained_handler(IRQ_EP93XX_GPIO2MUX,
+ ep93xx_gpio_f_irq_handler);
+ irq_set_chained_handler(IRQ_EP93XX_GPIO3MUX,
+ ep93xx_gpio_f_irq_handler);
+ irq_set_chained_handler(IRQ_EP93XX_GPIO4MUX,
+ ep93xx_gpio_f_irq_handler);
+ irq_set_chained_handler(IRQ_EP93XX_GPIO5MUX,
+ ep93xx_gpio_f_irq_handler);
+ irq_set_chained_handler(IRQ_EP93XX_GPIO6MUX,
+ ep93xx_gpio_f_irq_handler);
+ irq_set_chained_handler(IRQ_EP93XX_GPIO7MUX,
+ ep93xx_gpio_f_irq_handler);
}
@@ -335,6 +342,20 @@ static void ep93xx_gpio_set(struct gpio_chip *chip, unsigned offset, int val)
local_irq_restore(flags);
}
+static int ep93xx_gpio_set_debounce(struct gpio_chip *chip,
+ unsigned offset, unsigned debounce)
+{
+ int gpio = chip->base + offset;
+ int irq = gpio_to_irq(gpio);
+
+ if (irq < 0)
+ return -EINVAL;
+
+ ep93xx_gpio_int_debounce(irq, debounce ? true : false);
+
+ return 0;
+}
+
static void ep93xx_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
{
struct ep93xx_gpio_chip *ep93xx_chip = to_ep93xx_gpio_chip(chip);
@@ -347,52 +368,14 @@ static void ep93xx_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
gpio = ep93xx_chip->chip.base;
for (i = 0; i < chip->ngpio; i++, gpio++) {
int is_out = data_dir_reg & (1 << i);
+ int irq = gpio_to_irq(gpio);
- seq_printf(s, " %s%d gpio-%-3d (%-12s) %s %s",
+ seq_printf(s, " %s%d gpio-%-3d (%-12s) %s %s %s\n",
chip->label, i, gpio,
gpiochip_is_requested(chip, i) ? : "",
is_out ? "out" : "in ",
- (data_reg & (1 << i)) ? "hi" : "lo");
-
- if (!is_out) {
- int irq = gpio_to_irq(gpio);
- struct irq_desc *desc = irq_desc + irq;
-
- if (irq >= 0 && desc->action) {
- char *trigger;
-
- switch (desc->status & IRQ_TYPE_SENSE_MASK) {
- case IRQ_TYPE_NONE:
- trigger = "(default)";
- break;
- case IRQ_TYPE_EDGE_FALLING:
- trigger = "edge-falling";
- break;
- case IRQ_TYPE_EDGE_RISING:
- trigger = "edge-rising";
- break;
- case IRQ_TYPE_EDGE_BOTH:
- trigger = "edge-both";
- break;
- case IRQ_TYPE_LEVEL_HIGH:
- trigger = "level-high";
- break;
- case IRQ_TYPE_LEVEL_LOW:
- trigger = "level-low";
- break;
- default:
- trigger = "?trigger?";
- break;
- }
-
- seq_printf(s, " irq-%d %s%s",
- irq, trigger,
- (desc->status & IRQ_WAKEUP)
- ? " wakeup" : "");
- }
- }
-
- seq_printf(s, "\n");
+ (data_reg & (1<< i)) ? "hi" : "lo",
+ (!is_out && irq>= 0) ? "(interrupt)" : "");
}
}
@@ -434,6 +417,18 @@ void __init ep93xx_gpio_init(void)
EP93XX_SYSCON_DEVCFG_GONIDE |
EP93XX_SYSCON_DEVCFG_HONIDE);
- for (i = 0; i < ARRAY_SIZE(ep93xx_gpio_banks); i++)
- gpiochip_add(&ep93xx_gpio_banks[i].chip);
+ for (i = 0; i < ARRAY_SIZE(ep93xx_gpio_banks); i++) {
+ struct gpio_chip *chip = &ep93xx_gpio_banks[i].chip;
+
+ /*
+ * Ports A, B, and F support input debouncing when
+ * used as interrupts.
+ */
+ if (!strcmp(chip->label, "A") ||
+ !strcmp(chip->label, "B") ||
+ !strcmp(chip->label, "F"))
+ chip->set_debounce = ep93xx_gpio_set_debounce;
+
+ gpiochip_add(chip);
+ }
}