mirror of https://github.com/hak5/openwrt.git
48 lines
1.5 KiB
Diff
48 lines
1.5 KiB
Diff
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From 5b9b2b5284f81941972105b13337c58489ea8fca Mon Sep 17 00:00:00 2001
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From: Mathias Kresin <dev@kresin.me>
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Date: Thu, 28 Jun 2018 21:57:40 +0200
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Subject: [PATCH] gpio: stp-xway: Implement get callback
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Add an implementation to get the current GPIO state.
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The callback is used by the leds-gpio driver for example, in case the
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current LED/GPIO state should be kept during driver load.
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Signed-off-by: Mathias Kresin <dev@kresin.me>
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Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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---
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drivers/gpio/gpio-stp-xway.c | 15 +++++++++++++++
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1 file changed, 15 insertions(+)
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--- a/drivers/gpio/gpio-stp-xway.c
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+++ b/drivers/gpio/gpio-stp-xway.c
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@@ -91,6 +91,20 @@ struct xway_stp {
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};
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/**
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+ * xway_stp_get() - gpio_chip->get - get gpios.
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+ * @gc: Pointer to gpio_chip device structure.
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+ * @gpio: GPIO signal number.
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+ *
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+ * Gets the shadow value.
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+ */
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+static int xway_stp_get(struct gpio_chip *gc, unsigned int gpio)
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+{
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+ struct xway_stp *chip = gpiochip_get_data(gc);
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+
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+ return (xway_stp_r32(chip->virt, XWAY_STP_CPU0) & BIT(gpio));
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+}
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+
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+/**
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* xway_stp_set() - gpio_chip->set - set gpios.
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* @gc: Pointer to gpio_chip device structure.
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* @gpio: GPIO signal number.
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@@ -215,6 +229,7 @@ static int xway_stp_probe(struct platfor
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chip->gc.parent = &pdev->dev;
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chip->gc.label = "stp-xway";
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chip->gc.direction_output = xway_stp_dir_out;
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+ chip->gc.get = xway_stp_get;
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chip->gc.set = xway_stp_set;
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chip->gc.request = xway_stp_request;
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chip->gc.base = -1;
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