From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-eopbgr20051.outbound.protection.outlook.com ([40.107.2.51]:40899 "EHLO EUR02-VE1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728217AbfBYH1O (ORCPT ); Mon, 25 Feb 2019 02:27:14 -0500 From: Jun Li Subject: [PATCH 2/2] usb: typec: add typec switch via GPIO control 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> Content-Language: en-US Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Sender: devicetree-owner@vger.kernel.org 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 List-ID: 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. =20 +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/Makefil= e 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 =20 obj-$(CONFIG_TYPEC_MUX_PI3USB30532) +=3D pi3usb30532.o +obj-$(CONFIG_TYPEC_SWITCH_GPIO) +=3D gpio-switch.o diff --git a/drivers/usb/typec/mux/gpio-switch.c b/drivers/usb/typec/mux/gp= io-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 =3D 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 =3D &pdev->dev; + int ret; + + gpio_sw =3D devm_kzalloc(dev, sizeof(*gpio_sw), GFP_KERNEL); + if (!gpio_sw) + return -ENOMEM; + + platform_set_drvdata(pdev, gpio_sw); + + gpio_sw->sw.dev =3D dev; + gpio_sw->sw.set =3D switch_gpio_set; + mutex_init(&gpio_sw->lock); + + /* Get the super speed active channel selection GPIO */ + gpio_sw->ss_sel =3D devm_gpiod_get(dev, NULL, GPIOD_OUT_LOW); + if (IS_ERR(gpio_sw->ss_sel)) + return PTR_ERR(gpio_sw->ss_sel); + + ret =3D 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 =3D platform_get_drvdata(pdev); + + typec_switch_unregister(&gpio_sw->sw); + + return 0; +} + +static const struct of_device_id of_typec_switch_gpio_match[] =3D { + { .compatible =3D "nxp,ptn36043" }, + { /* Sentinel */ } +}; +MODULE_DEVICE_TABLE(of, of_typec_switch_gpio_match); + +static struct platform_driver typec_switch_gpio_driver =3D { + .probe =3D typec_switch_gpio_probe, + .remove =3D typec_switch_gpio_remove, + .driver =3D { + .name =3D "typec-switch-gpio", + .of_match_table =3D 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 "); --=20 2.7.4