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authorMika Westerberg <mika.westerberg@linux.intel.com>2017-01-23 15:34:34 +0300
committerLinus Walleij <linus.walleij@linaro.org>2017-01-26 15:27:37 +0100
commit2956b5d94a76b596fa5057c2b3ca915cb27d7652 (patch)
tree3a1dbce1201ef4923a4124f63eb209026e8fba7e /drivers/gpio/gpio-menz127.c
parent15381bc7c7f52d56f87c56dd7c948ad78704b852 (diff)
downloadlinux-2956b5d94a76b596fa5057c2b3ca915cb27d7652.tar.bz2
pinctrl / gpio: Introduce .set_config() callback for GPIO chips
Currently we already have two pin configuration related callbacks available for GPIO chips .set_single_ended() and .set_debounce(). In future we expect to have even more, which does not scale well if we need to add yet another callback to the GPIO chip structure for each possible configuration parameter. Better solution is to reuse what we already have available in the generic pinconf. To support this, we introduce a new .set_config() callback for GPIO chips. The callback takes a single packed pin configuration value as parameter. This can then be extended easily beyond what is currently supported by just adding new types to the generic pinconf enum. If the GPIO driver is backed up by a pinctrl driver the GPIO driver can just assign gpiochip_generic_config() (introduced in this patch) to .set_config and that will take care configuration requests are directed to the pinctrl driver. We then convert the existing drivers over .set_config() and finally remove the .set_single_ended() and .set_debounce() callbacks. Suggested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-menz127.c')
-rw-r--r--drivers/gpio/gpio-menz127.c34
1 files changed, 25 insertions, 9 deletions
diff --git a/drivers/gpio/gpio-menz127.c b/drivers/gpio/gpio-menz127.c
index a1210e330571..e1037582e34d 100644
--- a/drivers/gpio/gpio-menz127.c
+++ b/drivers/gpio/gpio-menz127.c
@@ -89,22 +89,18 @@ static int men_z127_debounce(struct gpio_chip *gc, unsigned gpio,
static int men_z127_set_single_ended(struct gpio_chip *gc,
unsigned offset,
- enum single_ended_mode mode)
+ enum pin_config_param param)
{
struct men_z127_gpio *priv = gpiochip_get_data(gc);
u32 od_en;
- if (mode != LINE_MODE_OPEN_DRAIN &&
- mode != LINE_MODE_PUSH_PULL)
- return -ENOTSUPP;
-
spin_lock(&gc->bgpio_lock);
od_en = readl(priv->reg_base + MEN_Z127_ODER);
- if (mode == LINE_MODE_OPEN_DRAIN)
+ if (param == PIN_CONFIG_DRIVE_OPEN_DRAIN)
od_en |= BIT(offset);
else
- /* Implicitly LINE_MODE_PUSH_PULL */
+ /* Implicitly PIN_CONFIG_DRIVE_PUSH_PULL */
od_en &= ~BIT(offset);
writel(od_en, priv->reg_base + MEN_Z127_ODER);
@@ -113,6 +109,27 @@ static int men_z127_set_single_ended(struct gpio_chip *gc,
return 0;
}
+static int men_z127_set_config(struct gpio_chip *gc, unsigned offset,
+ unsigned long config)
+{
+ enum pin_config_param param = pinconf_to_config_param(config);
+
+ switch (param) {
+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
+ return men_z127_set_single_ended(gc, offset, param);
+
+ case PIN_CONFIG_INPUT_DEBOUNCE:
+ return men_z127_debounce(gc, offset,
+ pinconf_to_config_argument(config));
+
+ default:
+ break;
+ }
+
+ return -ENOTSUPP;
+}
+
static int men_z127_probe(struct mcb_device *mdev,
const struct mcb_device_id *id)
{
@@ -149,8 +166,7 @@ static int men_z127_probe(struct mcb_device *mdev,
if (ret)
goto err_unmap;
- men_z127_gpio->gc.set_debounce = men_z127_debounce;
- men_z127_gpio->gc.set_single_ended = men_z127_set_single_ended;
+ men_z127_gpio->gc.set_config = men_z127_set_config;
ret = gpiochip_add_data(&men_z127_gpio->gc, men_z127_gpio);
if (ret) {