| Message ID | 1551078369-1654-2-git-send-email-jun.li@nxp.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [1/2] dt-bindings: usb: add documentation for typec switch via GPIO | expand |
On Mon, Feb 25, 2019 at 9:27 AM Jun Li <jun.li@nxp.com> wrote: > > This patch adds a simple typec switch driver which only needs > a GPIO to switch the super speed active channel according to > typec orientation. > +#include <linux/module.h> > +#include <linux/mutex.h> > +#include <linux/kernel.h> > +#include <linux/platform_device.h> > +#include <linux/of.h> > +#include <linux/of_gpio.h> I don't see how these are in use.
On Mon, Feb 25, 2019 at 07:27:08AM +0000, Jun Li wrote: > 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 <jun.li@nxp.com> > --- > 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" depends on GPIOLIB? > + help > + Say Y or M if your system has a typec super speed channel > + switch via a simple GPIO control. > + thanks,
Hi > -----Original Message----- > From: Andy Shevchenko <andy.shevchenko@gmail.com> > Sent: 2019年2月26日 15:25 > To: Jun Li <jun.li@nxp.com> > Cc: robh+dt@kernel.org; heikki.krogerus@linux.intel.com; > gregkh@linuxfoundation.org; hdegoede@redhat.com; linux-usb@vger.kernel.org; > devicetree@vger.kernel.org; dl-linux-imx <linux-imx@nxp.com> > Subject: Re: [PATCH 2/2] usb: typec: add typec switch via GPIO control > > On Mon, Feb 25, 2019 at 9:27 AM Jun Li <jun.li@nxp.com> wrote: > > > > This patch adds a simple typec switch driver which only needs a GPIO > > to switch the super speed active channel according to typec > > orientation. > > > +#include <linux/module.h> > > +#include <linux/mutex.h> > > +#include <linux/kernel.h> > > +#include <linux/platform_device.h> > > > +#include <linux/of.h> > > +#include <linux/of_gpio.h> > > I don't see how these are in use. I will use below 2 head files instead for v2. #include <linux/gpio/consumer.h> #include <linux/mod_devicetable.h> Thanks Li Jun > > -- > With Best Regards, > Andy Shevchenko
> -----Original Message----- > From: Heikki Krogerus <heikki.krogerus@linux.intel.com> > Sent: 2019年2月27日 17:41 > To: Jun Li <jun.li@nxp.com> > Cc: robh+dt@kernel.org; gregkh@linuxfoundation.org; hdegoede@redhat.com; > andy.shevchenko@gmail.com; linux-usb@vger.kernel.org; > devicetree@vger.kernel.org; dl-linux-imx <linux-imx@nxp.com> > Subject: Re: [PATCH 2/2] usb: typec: add typec switch via GPIO control > > On Mon, Feb 25, 2019 at 07:27:08AM +0000, Jun Li wrote: > > 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 <jun.li@nxp.com> > > --- > > 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" > > depends on GPIOLIB? Yes, you are right, will add it in v2. Thanks Li Jun > > > + help > > + Say Y or M if your system has a typec super speed channel > > + switch via a simple GPIO control. > > + > > thanks, > > -- > heikki
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 <jun.li@nxp.com> + * + */ + +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/of.h> +#include <linux/of_gpio.h> +#include <linux/usb/typec_mux.h> + +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 <jun.li@nxp.com>");
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 <jun.li@nxp.com> --- 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