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- From 5b9b2b5284f81941972105b13337c58489ea8fca Mon Sep 17 00:00:00 2001
- From: Mathias Kresin <[email protected]>
- Date: Thu, 28 Jun 2018 21:57:40 +0200
- Subject: [PATCH] gpio: stp-xway: Implement get callback
- 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 <[email protected]>
- Signed-off-by: Linus Walleij <[email protected]>
- ---
- drivers/gpio/gpio-stp-xway.c | 15 +++++++++++++++
- 1 file changed, 15 insertions(+)
- --- 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 platfor
- 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;
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