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Mon, 25 Feb 2019 07:27:08 +0000 Received: from VI1PR04MB4558.eurprd04.prod.outlook.com ([fe80::b0fe:dee7:b2d3:9355]) by VI1PR04MB4558.eurprd04.prod.outlook.com ([fe80::b0fe:dee7:b2d3:9355%5]) with mapi id 15.20.1643.019; Mon, 25 Feb 2019 07:27:08 +0000 From: Jun Li To: "robh+dt@kernel.org" , "heikki.krogerus@linux.intel.com" CC: "gregkh@linuxfoundation.org" , "hdegoede@redhat.com" , "andy.shevchenko@gmail.com" , "linux-usb@vger.kernel.org" , "devicetree@vger.kernel.org" , dl-linux-imx Subject: [PATCH 2/2] usb: typec: add typec switch via GPIO control Thread-Topic: [PATCH 2/2] usb: typec: add typec switch via GPIO control Thread-Index: AQHUzNuDwcpxjc7r9Ual6vhyiKL3bw== Date: Mon, 25 Feb 2019 07:27:08 +0000 Message-ID: <1551078369-1654-2-git-send-email-jun.li@nxp.com> References: <1551078369-1654-1-git-send-email-jun.li@nxp.com> In-Reply-To: <1551078369-1654-1-git-send-email-jun.li@nxp.com> Accept-Language: zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: git-send-email 2.7.4 x-clientproxiedby: HK0PR03CA0045.apcprd03.prod.outlook.com (2603:1096:203:2f::33) To VI1PR04MB4558.eurprd04.prod.outlook.com (2603:10a6:803:6f::24) authentication-results: spf=none (sender IP is ) smtp.mailfrom=jun.li@nxp.com; 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received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: ibDPsKKYLwYCKQ8WIF+hSnESlZDCLfudvgBAUSUP8C5CfJznnG7Y4L8VgtoTwQOVNjBqWrRzHZvXMLQEmjgEnuqOARgsnQLPyt1id4gxFu66TOSV4cmet69YG8o8DWuKK6cd5/4AiXgTNcoofKjTeBJ5kodHpc+EJzA2pTeWThNU+n6Pxza47HadZJ2XqrjklQM6hD7MvqVd8vexpGb22WhoiZHjg3s7tDqhAlHFmq5KoAvHi+HNDRgocI/fsAp9SYlVU6ps7iSzz6S70r+/cWqpZftw9Svmj0Sj+PwR1W9ki5OlteZbPb1sLuSNYV2xkY7z9AhOVFRzPrkGq3eU31ZDTZU0pJ7cUX0cAX1QjGUxogBSN88ppJE76bVrR+rmqVt0ty0IpNv1vi5pI55v33paNFKGzBns2H8QbcPX7X4= MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: d323006c-6cef-4e61-8ef9-08d69af2a61f X-MS-Exchange-CrossTenant-originalarrivaltime: 25 Feb 2019 07:27:04.8490 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR04MB5518 Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds a simple typec switch driver which only needs a GPIO to switch the super speed active channel according to typec orientation. Signed-off-by: Li Jun --- drivers/usb/typec/mux/Kconfig | 6 +++ drivers/usb/typec/mux/Makefile | 1 + drivers/usb/typec/mux/gpio-switch.c | 105 ++++++++++++++++++++++++++++++++++++ 3 files changed, 112 insertions(+) create mode 100644 drivers/usb/typec/mux/gpio-switch.c diff --git a/drivers/usb/typec/mux/Kconfig b/drivers/usb/typec/mux/Kconfig index 01ed0d5..bc7d3c7 100644 --- a/drivers/usb/typec/mux/Kconfig +++ b/drivers/usb/typec/mux/Kconfig @@ -9,4 +9,10 @@ config TYPEC_MUX_PI3USB30532 Say Y or M if your system has a Pericom PI3USB30532 Type-C cross switch / mux chip found on some devices with a Type-C port. +config TYPEC_SWITCH_GPIO + tristate "Simple Super Speed Active Switch via GPIO" + help + Say Y or M if your system has a typec super speed channel + switch via a simple GPIO control. + endmenu diff --git a/drivers/usb/typec/mux/Makefile b/drivers/usb/typec/mux/Makefile index 1332e46..e29377c 100644 --- a/drivers/usb/typec/mux/Makefile +++ b/drivers/usb/typec/mux/Makefile @@ -1,3 +1,4 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_TYPEC_MUX_PI3USB30532) += pi3usb30532.o +obj-$(CONFIG_TYPEC_SWITCH_GPIO) += gpio-switch.o diff --git a/drivers/usb/typec/mux/gpio-switch.c b/drivers/usb/typec/mux/gpio-switch.c new file mode 100644 index 0000000..a51da68 --- /dev/null +++ b/drivers/usb/typec/mux/gpio-switch.c @@ -0,0 +1,105 @@ +// SPDX-License-Identifier: GPL-2.0 +/** + * gpio-switch.c - typec switch via a simple GPIO control. + * + * Copyright 2019 NXP + * Author: Jun Li + * + */ + +#include +#include +#include +#include +#include +#include +#include + +struct gpio_typec_switch { + struct typec_switch sw; + struct mutex lock; + struct gpio_desc *ss_sel; +}; + +static int switch_gpio_set(struct typec_switch *sw, + enum typec_orientation orientation) +{ + struct gpio_typec_switch *gpio_sw = container_of(sw, + struct gpio_typec_switch, sw); + + mutex_lock(&gpio_sw->lock); + + switch (orientation) { + case TYPEC_ORIENTATION_NORMAL: + gpiod_set_value_cansleep(gpio_sw->ss_sel, 1); + break; + case TYPEC_ORIENTATION_REVERSE: + gpiod_set_value_cansleep(gpio_sw->ss_sel, 0); + break; + case TYPEC_ORIENTATION_NONE: + break; + } + + mutex_unlock(&gpio_sw->lock); + + return 0; +} + +static int typec_switch_gpio_probe(struct platform_device *pdev) +{ + struct gpio_typec_switch *gpio_sw; + struct device *dev = &pdev->dev; + int ret; + + gpio_sw = devm_kzalloc(dev, sizeof(*gpio_sw), GFP_KERNEL); + if (!gpio_sw) + return -ENOMEM; + + platform_set_drvdata(pdev, gpio_sw); + + gpio_sw->sw.dev = dev; + gpio_sw->sw.set = switch_gpio_set; + mutex_init(&gpio_sw->lock); + + /* Get the super speed active channel selection GPIO */ + gpio_sw->ss_sel = devm_gpiod_get(dev, NULL, GPIOD_OUT_LOW); + if (IS_ERR(gpio_sw->ss_sel)) + return PTR_ERR(gpio_sw->ss_sel); + + ret = typec_switch_register(&gpio_sw->sw); + if (ret) { + dev_err(dev, "Error registering typec switch: %d\n", ret); + return ret; + } + + return 0; +} + +static int typec_switch_gpio_remove(struct platform_device *pdev) +{ + struct gpio_typec_switch *gpio_sw = platform_get_drvdata(pdev); + + typec_switch_unregister(&gpio_sw->sw); + + return 0; +} + +static const struct of_device_id of_typec_switch_gpio_match[] = { + { .compatible = "nxp,ptn36043" }, + { /* Sentinel */ } +}; +MODULE_DEVICE_TABLE(of, of_typec_switch_gpio_match); + +static struct platform_driver typec_switch_gpio_driver = { + .probe = typec_switch_gpio_probe, + .remove = typec_switch_gpio_remove, + .driver = { + .name = "typec-switch-gpio", + .of_match_table = of_typec_switch_gpio_match, + }, +}; + +module_platform_driver(typec_switch_gpio_driver); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("TypeC Super Speed Switch GPIO driver"); +MODULE_AUTHOR("Jun Li ");