Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966920AbbBDRUB (ORCPT ); Wed, 4 Feb 2015 12:20:01 -0500 Received: from mail-gw1-out.broadcom.com ([216.31.210.62]:1824 "EHLO mail-gw1-out.broadcom.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S966869AbbBDRT4 (ORCPT ); Wed, 4 Feb 2015 12:19:56 -0500 X-IronPort-AV: E=Sophos;i="5.09,519,1418112000"; d="scan'208";a="56473514" From: Ray Jui To: Linus Walleij , Alexandre Courbot , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , "Grant Likely" , Christian Daudt , Matt Porter , Florian Fainelli , Russell King , Joe Perches , "Arnd Bergmann" CC: Scott Branden , Dmitry Torokhov , Anatol Pomazau , , , , , , "Ray Jui" Subject: [PATCH v8 1/4] pinctrl: Cygnus: define Broadcom Cygnus GPIO/PINCONF binding Date: Wed, 4 Feb 2015 09:21:00 -0800 Message-ID: <1423070463-24483-2-git-send-email-rjui@broadcom.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1423070463-24483-1-git-send-email-rjui@broadcom.com> References: <1423070463-24483-1-git-send-email-rjui@broadcom.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3189 Lines: 125 Document the GPIO/PINCONF device tree binding for Broadcom Cygnus SoC Signed-off-by: Ray Jui Reviewed-by: Scott Branden --- .../bindings/pinctrl/brcm,cygnus-gpio.txt | 102 ++++++++++++++++++++ 1 file changed, 102 insertions(+) create mode 100644 Documentation/devicetree/bindings/pinctrl/brcm,cygnus-gpio.txt diff --git a/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-gpio.txt b/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-gpio.txt new file mode 100644 index 0000000..9b9196c --- /dev/null +++ b/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-gpio.txt @@ -0,0 +1,102 @@ +Broadcom Cygnus GPIO/PINCONF Controller + +Required properties: + +- compatible: + Must be "brcm,cygnus-gpio" + +- reg: + Define the base and range of the I/O address space that contains the Cygnus +GPIO/PINCONF controller registers + +- ngpios: + Total number of GPIOs the controller provides + +- #gpio-cells: + Must be two. The first cell is the GPIO pin number (within the +controller's pin space) and the second cell is used for the following: + bit[0]: polarity (0 for active high and 1 for active low) + +- gpio-controller: + Specifies that the node is a GPIO controller + +Optional properties: + +- interrupts: + Interrupt ID + +- interrupt-controller: + Specifies that the node is an interrupt controller + +- pinmux: + Specifies the phandle to the IOMUX device, where pins can be individually +muxed to GPIO + +Supported generic PINCONF properties in child nodes: + +- pins: + The list of pins (within the controller's own pin space) that properties +in the node apply to. Pin names are "gpio-" + +- bias-disable: + Disable pin bias + +- bias-pull-up: + Enable internal pull up resistor + +- bias-pull-down: + Enable internal pull down resistor + +- drive-strength: + Valid drive strength values include 2, 4, 6, 8, 10, 12, 14, 16 (mA) + +Example: + gpio_ccm: gpio@1800a000 { + compatible = "brcm,cygnus-gpio"; + reg = <0x1800a000 0x50>, + <0x0301d164 0x20>; + ngpios = <24>; + #gpio-cells = <2>; + gpio-controller; + interrupts = ; + interrupt-controller; + + touch_pins: touch_pins { + pwr: pwr { + pins = "gpio-0"; + drive-strength = <16>; + }; + + event: event { + pins = "gpio-1"; + bias-pull-up; + }; + }; + }; + + gpio_asiu: gpio@180a5000 { + compatible = "brcm,cygnus-gpio"; + reg = <0x180a5000 0x668>; + ngpios = <146>; + #gpio-cells = <2>; + gpio-controller; + interrupts = ; + interrupt-controller; + }; + + /* + * Touchscreen that uses the CCM GPIO 0 and 1 + */ + tsc { + ... + ... + gpio-pwr = <&gpio_ccm 0 0>; + gpio-event = <&gpio_ccm 1 0>; + }; + + /* Bluetooth that uses the ASIU GPIO 5, with polarity inverted */ + bluetooth { + ... + ... + bcm,rfkill-bank-sel = <&gpio_asiu 5 1> + } -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/