From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexander Shiyan Subject: [PATCH 2/2] GPIO: clps711x: Add DT support Date: Sat, 13 Apr 2013 08:21:40 +0400 Message-ID: <1365826900-30136-2-git-send-email-shc_work@mail.ru> References: <1365826900-30136-1-git-send-email-shc_work@mail.ru> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1365826900-30136-1-git-send-email-shc_work-JGs/UdohzUI@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org Sender: "devicetree-discuss" To: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org Cc: Alexander Shiyan , devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org, Rob Herring List-Id: devicetree@vger.kernel.org Add DT support to the CLPS711X GPIO driver. Signed-off-by: Alexander Shiyan --- .../devicetree/bindings/gpio/clps711x-gpio.txt | 28 ++++++++++++++++++++++ drivers/gpio/gpio-clps711x.c | 14 ++++++++--- 2 files changed, 39 insertions(+), 3 deletions(-) create mode 100644 Documentation/devicetree/bindings/gpio/clps711x-gpio.txt diff --git a/Documentation/devicetree/bindings/gpio/clps711x-gpio.txt b/Documentation/devicetree/bindings/gpio/clps711x-gpio.txt new file mode 100644 index 0000000..0fe2bb6 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/clps711x-gpio.txt @@ -0,0 +1,28 @@ +Cirrus Logic CLPS711X GPIO controller + +Required properties: +- compatible : Should be "cirrus,clps711x-gpio" +- reg : Physical base GPIO controller registers location and length. + There should be two registers, first is DATA register, the second + is DIRECTION. +- gpio-controller : Marks the device node as a gpio controller. +- #gpio-cells : Should be two. The first cell is the pin number and + the second cell is used to specify the gpio polarity: + 0 = active high + 1 = active low + +Note: Each GPIO port should have an alias correctly numbered in "aliases" +node. + +Example: + +aliases { + gpio0 = &porta; +}; + +porta: gpio@80000000 { + compatible = "cirrus,clps711x-gpio"; + reg = <0x80000000 0x1>, <0x80000040 0x1>; + gpio-controller; + #gpio-cells = <2>; +}; diff --git a/drivers/gpio/gpio-clps711x.c b/drivers/gpio/gpio-clps711x.c index 3c71815..e2e7ec9 100644 --- a/drivers/gpio/gpio-clps711x.c +++ b/drivers/gpio/gpio-clps711x.c @@ -16,10 +16,11 @@ static int clps711x_gpio_probe(struct platform_device *pdev) { + struct device_node *np = pdev->dev.of_node; void __iomem *dat, *dir; struct bgpio_chip *bgc; struct resource *res; - int err, id = pdev->id; + int err, id = np ? of_alias_get_id(np, "gpio") : pdev->id; if ((id < 0) || (id > 4)) return -ENODEV; @@ -76,10 +77,17 @@ static int clps711x_gpio_remove(struct platform_device *pdev) return bgpio_remove(bgc); } +static const struct of_device_id clps711x_gpio_ids[] = { + { .compatible = "cirrus,clps711x-gpio" }, + { }, +}; +MODULE_DEVICE_TABLE(of, clps711x_gpio_ids); + static struct platform_driver clps711x_gpio_driver = { .driver = { - .name = "clps711x-gpio", - .owner = THIS_MODULE, + .name = "clps711x-gpio", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(clps711x_gpio_ids), }, .probe = clps711x_gpio_probe, .remove = clps711x_gpio_remove, -- 1.8.1.5