From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= Subject: [PATCH v2 1/2] gpio: dt-bindings: add brcm,bcm6345-gpio bindings Date: Wed, 3 Aug 2016 14:05:56 +0200 Message-ID: <1470225957-5692-1-git-send-email-noltari@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Return-path: Received: from mail-wm0-f68.google.com ([74.125.82.68]:36543 "EHLO mail-wm0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757640AbcHCMGP (ORCPT ); Wed, 3 Aug 2016 08:06:15 -0400 Sender: linux-gpio-owner@vger.kernel.org List-Id: linux-gpio@vger.kernel.org To: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org Cc: linus.walleij@linaro.org, gnurou@gmail.com, chunkeey@googlemail.com, =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= This patch adds the device tree bindings for the Broadcom's BCM6345 memory-mapped GPIO controllers. The gpios will be supported by gpio-mmio code of the GPIO generic library. Signed-off-by: Álvaro Fernández Rojas --- v2: add improvements suggested by Jonas Gorski: - use native-endian instead of big-endian. - use gpio alias instead of gpio0. - be less dramatic with newer Broadcom SoCs. - reorder patches. .../devicetree/bindings/gpio/brcm,bcm6345-gpio.txt | 46 ++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/brcm,bcm6345-gpio.txt diff --git a/Documentation/devicetree/bindings/gpio/brcm,bcm6345-gpio.txt b/Documentation/devicetree/bindings/gpio/brcm,bcm6345-gpio.txt new file mode 100644 index 0000000..e785314 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/brcm,bcm6345-gpio.txt @@ -0,0 +1,46 @@ +Bindings for the Broadcom's brcm,bcm6345-gpio memory-mapped GPIO controllers. + +These bindings can be used on any BCM63xx SoC. However, BCM6338 and BCM6345 +are the only ones which don't need a pinctrl driver. +BCM6338 have 8-bit data and dirout registers, where GPIO state can be read +and/or written, and the direction changed from input to output. +BCM6345 have 16-bit data and dirout registers, where GPIO state can be read +and/or written, and the direction changed from input to output. + +Required properties: + - compatible: should be "brcm,bcm6345-gpio" + - reg-names: must contain + "dat" - data register + "dirout" - direction (output) register + - reg: address + size pairs describing the GPIO register sets; + order must correspond with the order of entries in reg-names + - #gpio-cells: must be set to 2. The first cell is the pin number and + the second cell is used to specify the gpio polarity: + 0 = active high + 1 = active low + - gpio-controller: Marks the device node as a gpio controller. + +Optional properties: + - native-endian: use native endian memory. + +Examples: + - BCM6338: + gpio: gpio-controller@fffe0407 { + compatible = "brcm,bcm6345-gpio"; + reg-names = "dirout", "dat"; + reg = <0xfffe0407 1>, <0xfffe040f 1>; + + #gpio-cells = <2>; + gpio-controller; + }; + + - BCM6345: + gpio: gpio-controller@fffe0406 { + compatible = "brcm,bcm6345-gpio"; + reg-names = "dirout", "dat"; + reg = <0xfffe0406 2>, <0xfffe040a 2>; + native-endian; + + #gpio-cells = <2>; + gpio-controller; + }; -- 2.1.4