From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030690AbaLLQff (ORCPT ); Fri, 12 Dec 2014 11:35:35 -0500 Received: from mail-by2on0092.outbound.protection.outlook.com ([207.46.100.92]:14608 "EHLO na01-by2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S933644AbaLLQfd convert rfc822-to-8bit (ORCPT ); Fri, 12 Dec 2014 11:35:33 -0500 From: Soren Brinkmann To: Linus Walleij , Rob Herring , Pawel Moll , Mark Rutland CC: =?UTF-8?q?S=C3=B6ren=20Brinkmann?= , Michal Simek , , , Alessandro Rubini , Heiko Stuebner , Laurent Pinchart , , , "Ivan T. Ivanov" , Bjorn Andersson , Beniamino Galvani , Ian Campbell , Kumar Gala , Grant Likely , Subject: [PATCH v3 3/7] pinctrl: zynq: Document DT binding Date: Fri, 12 Dec 2014 08:34:54 -0800 X-Mailer: git-send-email 2.2.0.1.g9ee0458 In-Reply-To: <1418402098-3811-1-git-send-email-soren.brinkmann@xilinx.com> References: <1418402098-3811-1-git-send-email-soren.brinkmann@xilinx.com> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT X-RCIS-Action: ALLOW X-TM-AS-Product-Ver: IMSS-7.1.0.1224-7.5.0.1018-21172.000 X-TM-AS-Result: No--13.364-7.0-31-1 X-imss-scan-details: No--13.364-7.0-31-1;No--13.364-5.0-31-1 X-TM-AS-User-Approved-Sender: No;No Message-ID: X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:149.199.60.83;CTRY:US;IPV:NLI;EFV:NLI;SFV:NSPM;SFS:(10009020)(6009001)(438002)(199003)(189002)(74316001)(20776003)(19580395003)(21056001)(50466002)(108616004)(106466001)(46102003)(64706001)(23676002)(19580405001)(53416004)(31966008)(47776003)(89996001)(87936001)(6806004)(50226001)(92726002)(86362001)(104016003)(76176999)(62966003)(107046002)(99396003)(4396001)(120916001)(229853001)(77156002)(92566001)(50986999)(107986001)(24736002)(23106004);DIR:OUT;SFP:1101;SCL:1;SRVR:BY2FFO11HUB047;H:xsj-pvapsmtpgw01;FPR:;SPF:Pass;MLV:sfv;PTR:unknown-60-83.xilinx.com;A:1;MX:1;LANG:en; X-Microsoft-Antispam: UriScan:; X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;SRVR:BY2FFO11HUB047; X-Exchange-Antispam-Report-Test: UriScan:; X-Exchange-Antispam-Report-CFA-Test: BCL:0;PCL:0;RULEID:;SRVR:BY2FFO11HUB047; X-Forefront-PRVS: 04238CD941 Authentication-Results: spf=pass (sender IP is 149.199.60.83) smtp.mailfrom=soren.brinkmann@xilinx.com; X-Exchange-Antispam-Report-CFA-Test: BCL:0;PCL:0;RULEID:;SRVR:BY2FFO11HUB047; X-OriginatorOrg: xilinx.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add documentation for the devicetree binding for the Zynq pincontroller. Signed-off-by: Soren Brinkmann Tested-by: Andreas Färber --- Changes since v1: - fix typo - add USB related documentation - remove 'pinctrl-' prefix for pinctrl sub-nodes - update documentation to enforce strict separation of pinmux and pinconf nodes - update example accordingly --- .../bindings/pinctrl/xlnx,zynq-pinctrl.txt | 104 +++++++++++++++++++++ 1 file changed, 104 insertions(+) create mode 100644 Documentation/devicetree/bindings/pinctrl/xlnx,zynq-pinctrl.txt diff --git a/Documentation/devicetree/bindings/pinctrl/xlnx,zynq-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/xlnx,zynq-pinctrl.txt new file mode 100644 index 000000000000..b7b55a964f65 --- /dev/null +++ b/Documentation/devicetree/bindings/pinctrl/xlnx,zynq-pinctrl.txt @@ -0,0 +1,104 @@ + Binding for Xilinx Zynq Pinctrl + +Required properties: +- compatible: "xlnx,zynq-pinctrl" +- syscon: phandle to SLCR +- reg: Offset and length of pinctrl space in SLCR + +Please refer to pinctrl-bindings.txt in this directory for details of the +common pinctrl bindings used by client devices, including the meaning of the +phrase "pin configuration node". + +Zynq's pin configuration nodes act as a container for an arbitrary number of +subnodes. Each of these subnodes represents some desired configuration for a +pin, a group, or a list of pins or groups. This configuration can include the +mux function to select on those pin(s)/group(s), and various pin configuration +parameters, such as pull-up, slew rate, etc. + +Each configuration node can consist of multiple nodes describing the pinmux and +pinconf options. Those nodes can be pinmux nodes or pinconf nodes. + +The name of each subnode is not important; all subnodes should be enumerated +and processed purely based on their content. + +Required properties for pinmux nodes are: + - groups: A list of pinmux groups. + - function: The name of a pinmux function to activate for the specified set + of groups. + +Required properties for configuration nodes: +One of: + - pins: a list of pin names + - groups: A list of pinmux groups. + +The following generic properties as defined in pinctrl-bindings.txt are valid +to specify in a pinmux subnode: + groups, function + +The following generic properties as defined in pinctrl-bindings.txt are valid +to specify in a pinconf subnode: + groups, pins, bias-disable, bias-high-impedance, bias-pull-up, slew-rate, + low-power-disable, low-power-enable + + Valid arguments for 'slew-rate' are '0' and '1' to select between slow and fast + respectively. + + Valid values for groups are: + ethernet0_0_grp, ethernet1_0_grp, mdio0_0_grp, mdio1_0_grp, + qspi0_0_grp, qspi1_0_grp, qspi_fbclk, qspi_cs1_grp, spi0_0_grp, + spi0_1_grp - spi0_2_grp, spi1_0_grp - spi1_3_grp, sdio0_0_grp - sdio0_2_grp, + sdio1_0_grp - sdio1_3_grp, sdio0_emio_wp, sdio0_emio_cd, sdio1_emio_wp, + sdio1_emio_cd, smc0_nor, smc0_nor_cs1_grp, smc0_nor_addr25_grp, smc0_nand, + can0_0_grp - can0_10_grp, can1_0_grp - can1_11_grp, uart0_0_grp - uart0_10_grp, + uart1_0_grp - uart1_11_grp, i2c0_0_grp - i2c0_10_grp, i2c1_0_grp - i2c1_10_grp, + ttc0_0_grp - ttc0_2_grp, ttc1_0_grp - ttc1_2_grp, swdt0_0_grp - swdt0_4_grp, + gpio0_0_grp - gpio0_53_grp, usb0_0_grp, usb1_0_grp + + Valid values for pins are: + MIO0 - MIO53 + + Valid values for function are: + ethernet0, ethernet1, mdio0, mdio1, qspi0, qspi1, qspi_fbclk, qspi_cs1, + spi0, spi1, sdio0, sdio0_pc, sdio0_cd, sdio0_wp, + sdio1, sdio1_pc, sdio1_cd, sdio1_wp, + smc0_nor, smc0_nor_cs1, smc0_nor_addr25, smc0_nand, can0, can1, uart0, uart1, + i2c0, i2c1, ttc0, ttc1, swdt0, gpio0, usb0, usb1 + +The following driver-specific properties as defined here are valid to specify in +a pin configuration subnode: + - io-standard: Configure the pin to use the selected IO standard according to + this mapping: + 1: LVCMOS18 + 2: LVCMOS25 + 3: LVCMOS33 + 4: HSTL + +Example: + pinctrl0: pinctrl@700 { + compatible = "xlnx,pinctrl-zynq"; + reg = <0x700 0x200>; + syscon = <&slcr>; + + pinctrl_uart1_default: uart1-default { + mux { + groups = "uart1_10_grp"; + function = "uart1"; + }; + + conf { + groups = "uart1_10_grp"; + slew-rate = <0>; + io-standard = <1>; + }; + + conf-rx { + pins = "MIO49"; + bias-high-impedance; + }; + + conf-tx { + pins = "MIO48"; + bias-disable; + }; + }; + }; -- 2.2.0.1.g9ee0458