OpenWrt – Blame information for rev 1
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Rev | Author | Line No. | Line |
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1 | office | 1 | From 5b9b2b5284f81941972105b13337c58489ea8fca Mon Sep 17 00:00:00 2001 |
2 | From: Mathias Kresin <dev@kresin.me> |
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3 | Date: Thu, 28 Jun 2018 21:57:40 +0200 |
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4 | Subject: [PATCH] gpio: stp-xway: Implement get callback |
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5 | |||
6 | Add an implementation to get the current GPIO state. |
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7 | |||
8 | The callback is used by the leds-gpio driver for example, in case the |
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9 | current LED/GPIO state should be kept during driver load. |
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10 | |||
11 | Signed-off-by: Mathias Kresin <dev@kresin.me> |
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12 | Signed-off-by: Linus Walleij <linus.walleij@linaro.org> |
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13 | --- |
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14 | drivers/gpio/gpio-stp-xway.c | 15 +++++++++++++++ |
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15 | 1 file changed, 15 insertions(+) |
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16 | |||
17 | --- a/drivers/gpio/gpio-stp-xway.c |
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18 | +++ b/drivers/gpio/gpio-stp-xway.c |
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19 | @@ -91,6 +91,20 @@ struct xway_stp { |
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20 | }; |
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21 | |||
22 | /** |
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23 | + * xway_stp_get() - gpio_chip->get - get gpios. |
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24 | + * @gc: Pointer to gpio_chip device structure. |
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25 | + * @gpio: GPIO signal number. |
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26 | + * |
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27 | + * Gets the shadow value. |
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28 | + */ |
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29 | +static int xway_stp_get(struct gpio_chip *gc, unsigned int gpio) |
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30 | +{ |
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31 | + struct xway_stp *chip = gpiochip_get_data(gc); |
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32 | + |
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33 | + return (xway_stp_r32(chip->virt, XWAY_STP_CPU0) & BIT(gpio)); |
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34 | +} |
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35 | + |
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36 | +/** |
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37 | * xway_stp_set() - gpio_chip->set - set gpios. |
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38 | * @gc: Pointer to gpio_chip device structure. |
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39 | * @gpio: GPIO signal number. |
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40 | @@ -215,6 +229,7 @@ static int xway_stp_probe(struct platfor |
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41 | chip->gc.parent = &pdev->dev; |
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42 | chip->gc.label = "stp-xway"; |
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43 | chip->gc.direction_output = xway_stp_dir_out; |
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44 | + chip->gc.get = xway_stp_get; |
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45 | chip->gc.set = xway_stp_set; |
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46 | chip->gc.request = xway_stp_request; |
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47 | chip->gc.base = -1; |