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authorMagnus Damm <damm@opensource.se>2011-09-28 16:50:58 +0900
committerPaul Mundt <lethal@linux-sh.org>2011-10-28 15:03:52 +0900
commitad2a8e7ea4128af984a98537b1b9484722b6b4bb (patch)
treecf5030dda233a9182e78574356d1853652753aad /drivers/sh
parentcf8e56bf5b60dba5ba11db83ca7f1df884e568e5 (diff)
sh: pfc: Add GPIO IRQ support
Add GPIO IRQ support to the shared PFC code in drivers/sh/pfc.c The enums pointed out by a certain GPIO will be matched against a table for IRQ to enum mappings. Only the shared PFC code is updated by this patch. SoC specific changes are also needed to allow platforms to make use of this feature. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'drivers/sh')
-rw-r--r--drivers/sh/pfc.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/sh/pfc.c b/drivers/sh/pfc.c
index de5e3d65a6f..e67fe170d8d 100644
--- a/drivers/sh/pfc.c
+++ b/drivers/sh/pfc.c
@@ -577,6 +577,32 @@ static void sh_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
sh_gpio_set_value(chip_to_pinmux(chip), offset, value);
}
+static int sh_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+ struct pinmux_info *gpioc = chip_to_pinmux(chip);
+ pinmux_enum_t enum_id;
+ pinmux_enum_t *enum_ids;
+ int i, k, pos;
+
+ pos = 0;
+ enum_id = 0;
+ while (1) {
+ pos = get_gpio_enum_id(gpioc, offset, pos, &enum_id);
+ if (pos <= 0 || !enum_id)
+ break;
+
+ for (i = 0; i < gpioc->gpio_irq_size; i++) {
+ enum_ids = gpioc->gpio_irq[i].enum_ids;
+ for (k = 0; enum_ids[k]; k++) {
+ if (enum_ids[k] == enum_id)
+ return gpioc->gpio_irq[i].irq;
+ }
+ }
+ }
+
+ return -ENOSYS;
+}
+
int register_pinmux(struct pinmux_info *pip)
{
struct gpio_chip *chip = &pip->chip;
@@ -592,6 +618,7 @@ int register_pinmux(struct pinmux_info *pip)
chip->get = sh_gpio_get;
chip->direction_output = sh_gpio_direction_output;
chip->set = sh_gpio_set;
+ chip->to_irq = sh_gpio_to_irq;
WARN_ON(pip->first_gpio != 0); /* needs testing */