Re: [PATCH v3 3/4] extcon: ptn5150: Add Type-C orientation switch support

[Frank Li <Frank.li@nxp.com>]

On Fri, May 09, 2025 at 02:45:25PM +0800, Xu Yang wrote:
> PTN5150 is able to detect CC polarity. The field[1:0] of CC status
> register (04H) will keep the result.
>
>   00: Cable Not Attached
>   01: CC1 is connected (normal orientation)
>   10: CC2 is connected (reversed orientation)
>   11: Reserved
>
> Add orientation switch support to correctly set orientation of
> multiplexer according to CC status.
>
> Signed-off-by: Xu Yang <xu.yang_2@nxp.com>

Reviewed-by: Frank Li <Frank.Li@nxp.com>

>
> ---
> Changes in v3:
>  - no changes
> Changes in v2:
>  - move "enum typec_orientation orient" ahead
>  - improve commit message
> ---
>  drivers/extcon/Kconfig          |  1 +
>  drivers/extcon/extcon-ptn5150.c | 40 +++++++++++++++++++++++++++++++++
>  2 files changed, 41 insertions(+)
>
> diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
> index a6f6d467aacf..fd4ec5dda0b7 100644
> --- a/drivers/extcon/Kconfig
> +++ b/drivers/extcon/Kconfig
> @@ -145,6 +145,7 @@ config EXTCON_PTN5150
>  	tristate "NXP PTN5150 CC LOGIC USB EXTCON support"
>  	depends on I2C && (GPIOLIB || COMPILE_TEST)
>  	depends on USB_ROLE_SWITCH || !USB_ROLE_SWITCH
> +	depends on TYPEC || !TYPEC
>  	select REGMAP_I2C
>  	help
>  	  Say Y here to enable support for USB peripheral and USB host
> diff --git a/drivers/extcon/extcon-ptn5150.c b/drivers/extcon/extcon-ptn5150.c
> index 78ad86c4a3be..768428d306ce 100644
> --- a/drivers/extcon/extcon-ptn5150.c
> +++ b/drivers/extcon/extcon-ptn5150.c
> @@ -18,6 +18,7 @@
>  #include <linux/extcon-provider.h>
>  #include <linux/gpio/consumer.h>
>  #include <linux/usb/role.h>
> +#include <linux/usb/typec_mux.h>
>
>  /* PTN5150 registers */
>  #define PTN5150_REG_DEVICE_ID			0x01
> @@ -38,7 +39,11 @@
>  #define PTN5150_REG_DEVICE_ID_VERSION		GENMASK(7, 3)
>  #define PTN5150_REG_DEVICE_ID_VENDOR		GENMASK(2, 0)
>
> +#define PTN5150_POLARITY_CC1			0x1
> +#define PTN5150_POLARITY_CC2			0x2
> +
>  #define PTN5150_REG_CC_PORT_ATTACHMENT		GENMASK(4, 2)
> +#define PTN5150_REG_CC_POLARITY			GENMASK(1, 0)
>  #define PTN5150_REG_CC_VBUS_DETECTION		BIT(7)
>  #define PTN5150_REG_INT_CABLE_ATTACH_MASK	BIT(0)
>  #define PTN5150_REG_INT_CABLE_DETACH_MASK	BIT(1)
> @@ -53,6 +58,7 @@ struct ptn5150_info {
>  	int irq;
>  	struct work_struct irq_work;
>  	struct mutex mutex;
> +	struct typec_switch *orient_sw;
>  	struct usb_role_switch *role_sw;
>  };
>
> @@ -71,6 +77,7 @@ static const struct regmap_config ptn5150_regmap_config = {
>
>  static void ptn5150_check_state(struct ptn5150_info *info)
>  {
> +	enum typec_orientation orient = TYPEC_ORIENTATION_NONE;
>  	unsigned int port_status, reg_data, vbus;
>  	enum usb_role usb_role = USB_ROLE_NONE;
>  	int ret;
> @@ -81,6 +88,23 @@ static void ptn5150_check_state(struct ptn5150_info *info)
>  		return;
>  	}
>
> +	orient = FIELD_GET(PTN5150_REG_CC_POLARITY, reg_data);
> +	switch (orient) {
> +	case PTN5150_POLARITY_CC1:
> +		orient = TYPEC_ORIENTATION_NORMAL;
> +		break;
> +	case PTN5150_POLARITY_CC2:
> +		orient = TYPEC_ORIENTATION_REVERSE;
> +		break;
> +	default:
> +		orient = TYPEC_ORIENTATION_NONE;
> +		break;
> +	}
> +
> +	ret = typec_switch_set(info->orient_sw, orient);
> +	if (ret)
> +		dev_err(info->dev, "failed to set orientation: %d\n", ret);
> +
>  	port_status = FIELD_GET(PTN5150_REG_CC_PORT_ATTACHMENT, reg_data);
>
>  	switch (port_status) {
> @@ -152,6 +176,12 @@ static void ptn5150_irq_work(struct work_struct *work)
>  				dev_err(info->dev,
>  					"failed to set none role: %d\n",
>  					ret);
> +
> +			ret = typec_switch_set(info->orient_sw,
> +					       TYPEC_ORIENTATION_NONE);
> +			if (ret)
> +				dev_err(info->dev,
> +					"failed to set orientation: %d\n", ret);
>  		}
>  	}
>
> @@ -219,12 +249,14 @@ static void ptn5150_work_sync_and_put(void *data)
>
>  	cancel_work_sync(&info->irq_work);
>  	usb_role_switch_put(info->role_sw);
> +	typec_switch_put(info->orient_sw);
>  }
>
>  static int ptn5150_i2c_probe(struct i2c_client *i2c)
>  {
>  	struct device *dev = &i2c->dev;
>  	struct device_node *np = i2c->dev.of_node;
> +	struct fwnode_handle *connector;
>  	struct ptn5150_info *info;
>  	int ret;
>
> @@ -311,6 +343,14 @@ static int ptn5150_i2c_probe(struct i2c_client *i2c)
>  	if (ret)
>  		return -EINVAL;
>
> +	connector = device_get_named_child_node(dev, "connector");
> +	if (connector) {
> +		info->orient_sw = fwnode_typec_switch_get(connector);
> +		if (IS_ERR(info->orient_sw))
> +			return dev_err_probe(info->dev, PTR_ERR(info->orient_sw),
> +					"failed to get orientation switch\n");
> +	}
> +
>  	info->role_sw = usb_role_switch_get(info->dev);
>  	if (IS_ERR(info->role_sw))
>  		return dev_err_probe(info->dev, PTR_ERR(info->role_sw),
> --
> 2.34.1
>