Commit 842546c5 authored by Xu Yang's avatar Xu Yang Committed by Chanwoo Choi
Browse files

extcon: ptn5150: Add Type-C orientation switch support 



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.

Acked-by: default avatarChanwoo Choi <cw00.choi@samsung.com>
Reviewed-by: default avatarFrank Li <Frank.Li@nxp.com>
Signed-off-by: default avatarXu Yang <xu.yang_2@nxp.com>
Signed-off-by: default avatarChanwoo Choi <cw00.choi@samsung.com>
Link: https://lore.kernel.org/lkml/20250926025309.24267-2-xu.yang_2@nxp.com/
parent 086d7f1e

drivers/extcon/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -158,6 +158,7 @@ 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

drivers/extcon/extcon-ptn5150.c

+40 −0
Original line number Diff line number Diff line
@@ -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),