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authorMark Brown <broonie@opensource.wolfsonmicro.com>2010-09-01 10:47:16 +0100
committerMark Brown <broonie@opensource.wolfsonmicro.com>2010-11-26 15:16:19 +0000
commit4b666729010cbf315c9099b956b193df8edc6753 (patch)
treee82401d895585ae2de1e0beff44579d2b764f92e /drivers/gpio
parent559e0df6b3ffbc218a11bb9dada5320a217cb7a6 (diff)
gpiolib: Add WM8958 support to the WM8994 driver
Several of the GPIOs on the WM8994 are fixed function on the WM8958 so error out if the user tries to request them with gpiolib. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/wm8994-gpio.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/gpio/wm8994-gpio.c b/drivers/gpio/wm8994-gpio.c
index 618398e4ed8e..c822baacd8fc 100644
--- a/drivers/gpio/wm8994-gpio.c
+++ b/drivers/gpio/wm8994-gpio.c
@@ -35,6 +35,29 @@ static inline struct wm8994_gpio *to_wm8994_gpio(struct gpio_chip *chip)
return container_of(chip, struct wm8994_gpio, gpio_chip);
}
+static int wm8994_gpio_request(struct gpio_chip *chip, unsigned offset)
+{
+ struct wm8994_gpio *wm8994_gpio = to_wm8994_gpio(chip);
+ struct wm8994 *wm8994 = wm8994_gpio->wm8994;
+
+ switch (wm8994->type) {
+ case WM8958:
+ switch (offset) {
+ case 1:
+ case 2:
+ case 3:
+ case 4:
+ case 6:
+ return -EINVAL;
+ }
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
static int wm8994_gpio_direction_in(struct gpio_chip *chip, unsigned offset)
{
struct wm8994_gpio *wm8994_gpio = to_wm8994_gpio(chip);
@@ -136,6 +159,7 @@ static void wm8994_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
static struct gpio_chip template_chip = {
.label = "wm8994",
.owner = THIS_MODULE,
+ .request = wm8994_gpio_request,
.direction_input = wm8994_gpio_direction_in,
.get = wm8994_gpio_get,
.direction_output = wm8994_gpio_direction_out,