Messages in this thread Patch in this message | | | From | Li Jun <> | Subject | [PATCH] extcon: ptn5150: add usb role class support | Date | Wed, 6 Apr 2022 17:42:22 +0800 |
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Add support of usb role class consumer to do role switch.
Signed-off-by: Li Jun <jun.li@nxp.com> --- drivers/extcon/Kconfig | 1 + drivers/extcon/extcon-ptn5150.c | 39 +++++++++++++++++++++++++++++++++ 2 files changed, 40 insertions(+)
diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig index 0d42e49105dd..9828ade787a8 100644 --- a/drivers/extcon/Kconfig +++ b/drivers/extcon/Kconfig @@ -132,6 +132,7 @@ config EXTCON_PTN5150 tristate "NXP PTN5150 CC LOGIC USB EXTCON support" depends on I2C && (GPIOLIB || COMPILE_TEST) select REGMAP_I2C + select USB_ROLE_SWITCH help Say Y here to enable support for USB peripheral and USB host detection by NXP PTN5150 CC (Configuration Channel) logic chip. diff --git a/drivers/extcon/extcon-ptn5150.c b/drivers/extcon/extcon-ptn5150.c index 5b9a3cf8df26..821b0f390308 100644 --- a/drivers/extcon/extcon-ptn5150.c +++ b/drivers/extcon/extcon-ptn5150.c @@ -17,6 +17,7 @@ #include <linux/slab.h> #include <linux/extcon-provider.h> #include <linux/gpio/consumer.h> +#include <linux/usb/role.h> /* PTN5150 registers */ #define PTN5150_REG_DEVICE_ID 0x01 @@ -52,6 +53,7 @@ struct ptn5150_info { int irq; struct work_struct irq_work; struct mutex mutex; + struct usb_role_switch *role_sw; }; /* List of detectable cables */ @@ -85,6 +87,12 @@ static void ptn5150_check_state(struct ptn5150_info *info) extcon_set_state_sync(info->edev, EXTCON_USB_HOST, false); gpiod_set_value_cansleep(info->vbus_gpiod, 0); extcon_set_state_sync(info->edev, EXTCON_USB, true); + + ret = usb_role_switch_set_role(info->role_sw, USB_ROLE_DEVICE); + if (ret) + dev_err(info->dev, "failed to set device role: %d\n", + ret); + break; case PTN5150_UFP_ATTACHED: extcon_set_state_sync(info->edev, EXTCON_USB, false); @@ -95,6 +103,12 @@ static void ptn5150_check_state(struct ptn5150_info *info) gpiod_set_value_cansleep(info->vbus_gpiod, 1); extcon_set_state_sync(info->edev, EXTCON_USB_HOST, true); + + ret = usb_role_switch_set_role(info->role_sw, USB_ROLE_HOST); + if (ret) + dev_err(info->dev, "failed to set host role: %d\n", + ret); + break; default: break; @@ -133,6 +147,13 @@ static void ptn5150_irq_work(struct work_struct *work) extcon_set_state_sync(info->edev, EXTCON_USB, false); gpiod_set_value_cansleep(info->vbus_gpiod, 0); + + ret = usb_role_switch_set_role(info->role_sw, + USB_ROLE_NONE); + if (ret) + dev_err(info->dev, + "failed to set none role: %d\n", + ret); } } @@ -194,6 +215,14 @@ static int ptn5150_init_dev_type(struct ptn5150_info *info) return 0; } +static void ptn5150_put_role_sw(void *data) +{ + struct ptn5150_info *info = data; + + cancel_work_sync(&info->irq_work); + usb_role_switch_put(info->role_sw); +} + static int ptn5150_i2c_probe(struct i2c_client *i2c) { struct device *dev = &i2c->dev; @@ -284,6 +313,16 @@ static int ptn5150_i2c_probe(struct i2c_client *i2c) if (ret) return -EINVAL; + info->role_sw = usb_role_switch_get(info->dev); + if (IS_ERR(info->role_sw)) + return PTR_ERR(info->role_sw); + + if (info->role_sw) { + ret = devm_add_action_or_reset(dev, ptn5150_put_role_sw, info); + if (ret) + return ret; + } + /* * Update current extcon state if for example OTG connection was there * before the probe -- 2.25.1
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