| Message ID | 1530215860-25549-1-git-send-email-dev@kresin.me |
|---|---|
| State | New |
| Headers | show |
| Series | gpio: stp-xway: Implement get callback | expand |
On Thu, Jun 28, 2018 at 10:02 PM Mathias Kresin <dev@kresin.me> wrote: > Add an implementation to get the current GPIO state. > > The callback is used by the leds-gpio driver for example, in case the > current LED/GPIO state should be kept during driver load. > > Signed-off-by: Mathias Kresin <dev@kresin.me> Patch applied. Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/gpio/gpio-stp-xway.c b/drivers/gpio/gpio-stp-xway.c index c07385b..63c708c 100644 --- a/drivers/gpio/gpio-stp-xway.c +++ b/drivers/gpio/gpio-stp-xway.c @@ -91,6 +91,20 @@ struct xway_stp { }; /** + * xway_stp_get() - gpio_chip->get - get gpios. + * @gc: Pointer to gpio_chip device structure. + * @gpio: GPIO signal number. + * + * Gets the shadow value. + */ +static int xway_stp_get(struct gpio_chip *gc, unsigned int gpio) +{ + struct xway_stp *chip = gpiochip_get_data(gc); + + return (xway_stp_r32(chip->virt, XWAY_STP_CPU0) & BIT(gpio)); +} + +/** * xway_stp_set() - gpio_chip->set - set gpios. * @gc: Pointer to gpio_chip device structure. * @gpio: GPIO signal number. @@ -215,6 +229,7 @@ static int xway_stp_probe(struct platform_device *pdev) chip->gc.parent = &pdev->dev; chip->gc.label = "stp-xway"; chip->gc.direction_output = xway_stp_dir_out; + chip->gc.get = xway_stp_get; chip->gc.set = xway_stp_set; chip->gc.request = xway_stp_request; chip->gc.base = -1;
Add an implementation to get the current GPIO state. The callback is used by the leds-gpio driver for example, in case the current LED/GPIO state should be kept during driver load. Signed-off-by: Mathias Kresin <dev@kresin.me> --- drivers/gpio/gpio-stp-xway.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)