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gpiolib: Add WM8958 support to the WM8994 driver

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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>
This commit is contained in:
Mark Brown 2010-09-01 10:47:16 +01:00
parent 559e0df6b3
commit 4b66672901
1 changed files with 24 additions and 0 deletions
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24
drivers/gpio/wm8994-gpio.c
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@ -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); 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) static int wm8994_gpio_direction_in(struct gpio_chip *chip, unsigned offset)
{ {
struct wm8994_gpio *wm8994_gpio = to_wm8994_gpio(chip); 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 = { static struct gpio_chip template_chip = {
.label = "wm8994", .label = "wm8994",
.owner = THIS_MODULE, .owner = THIS_MODULE,
.request = wm8994_gpio_request,
.direction_input = wm8994_gpio_direction_in, .direction_input = wm8994_gpio_direction_in,
.get = wm8994_gpio_get, .get = wm8994_gpio_get,
.direction_output = wm8994_gpio_direction_out, .direction_output = wm8994_gpio_direction_out,