Merge tag 'extcon-next-for-5.16' of...

Merge tag 'extcon-next-for-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/extcon into char-misc-next

Chanwoo writes:

Update extcon next for v5.16

Detailed description for this pull request:
1. Add support for TUSB320L and update tusb320 extcon driver
- The existing extcon-usbc-tusb320 driver is updated
for supporting the mode setting and reset operation.
Also, this driver supports the simliar TUSB320L device
at the same extcon-usbc-tusb320 extcon provider driver.

2. Use p-unit semaphone lock for register access for extcon-axp288
driver

3. Update the minor clean-up for extcon-max3355 and extcon-usb-gpio
driver.

* tag 'extcon-next-for-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/extcon:
  dt-bindings: extcon: usbc-tusb320: Add TUSB320L compatible string
  extcon: usbc-tusb320: Add support for TUSB320L
  extcon: usbc-tusb320: Add support for mode setting and reset
  extcon: extcon-axp288: Use P-Unit semaphore lock for register accesses
  extcon: max3355: Drop unused include
  extcon: usb-gpio: Use the right includes

Documentation/devicetree/bindings/extcon/extcon-usbc-tusb320.yaml

@@ -11,7 +11,9 @@ maintainers:
 
 properties:
   compatible:
-    const: ti,tusb320
+    enum:
+      - ti,tusb320
+      - ti,tusb320l
 
   reg:
     maxItems: 1

drivers/extcon/Kconfig

@@ -23,7 +23,7 @@ config EXTCON_ADC_JACK
 
 config EXTCON_AXP288
 	tristate "X-Power AXP288 EXTCON support"
-	depends on MFD_AXP20X && USB_SUPPORT && X86 && ACPI
+	depends on MFD_AXP20X && USB_SUPPORT && X86 && ACPI && IOSF_MBI
 	select USB_ROLE_SWITCH
 	help
 	  Say Y here to enable support for USB peripheral detection

drivers/extcon/extcon-axp288.c

@@ -24,6 +24,7 @@
 
 #include <asm/cpu_device_id.h>
 #include <asm/intel-family.h>
+#include <asm/iosf_mbi.h>
 
 /* Power source status register */
 #define PS_STAT_VBUS_TRIGGER		BIT(0)
@@ -215,6 +216,10 @@ static int axp288_handle_chrg_det_event(struct axp288_extcon_info *info)
 	unsigned int cable = info->previous_cable;
 	bool vbus_attach = false;
 
+	ret = iosf_mbi_block_punit_i2c_access();
+	if (ret < 0)
+		return ret;
+
 	vbus_attach = axp288_get_vbus_attach(info);
 	if (!vbus_attach)
 		goto no_vbus;
@@ -253,6 +258,8 @@ static int axp288_handle_chrg_det_event(struct axp288_extcon_info *info)
 	}
 
 no_vbus:
+	iosf_mbi_unblock_punit_i2c_access();
+
 	extcon_set_state_sync(info->edev, info->previous_cable, false);
 	if (info->previous_cable == EXTCON_CHG_USB_SDP)
 		extcon_set_state_sync(info->edev, EXTCON_USB, false);
@@ -275,6 +282,8 @@ static int axp288_handle_chrg_det_event(struct axp288_extcon_info *info)
 	return 0;
 
 dev_det_ret:
+	iosf_mbi_unblock_punit_i2c_access();
+
 	if (ret < 0)
 		dev_err(info->dev, "failed to detect BC Mod\n");
 
@@ -305,13 +314,23 @@ static irqreturn_t axp288_extcon_isr(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
-static void axp288_extcon_enable(struct axp288_extcon_info *info)
+static int axp288_extcon_enable(struct axp288_extcon_info *info)
 {
+	int ret = 0;
+
+	ret = iosf_mbi_block_punit_i2c_access();
+	if (ret < 0)
+		return ret;
+
 	regmap_update_bits(info->regmap, AXP288_BC_GLOBAL_REG,
 						BC_GLOBAL_RUN, 0);
 	/* Enable the charger detection logic */
 	regmap_update_bits(info->regmap, AXP288_BC_GLOBAL_REG,
 					BC_GLOBAL_RUN, BC_GLOBAL_RUN);
+
+	iosf_mbi_unblock_punit_i2c_access();
+
+	return ret;
 }
 
 static void axp288_put_role_sw(void *data)
@@ -384,10 +403,16 @@ static int axp288_extcon_probe(struct platform_device *pdev)
 		}
 	}
 
+	ret = iosf_mbi_block_punit_i2c_access();
+	if (ret < 0)
+		return ret;
+
 	info->vbus_attach = axp288_get_vbus_attach(info);
 
 	axp288_extcon_log_rsi(info);
 
+	iosf_mbi_unblock_punit_i2c_access();
+
 	/* Initialize extcon device */
 	info->edev = devm_extcon_dev_allocate(&pdev->dev,
 					      axp288_extcon_cables);
@@ -441,7 +466,9 @@ static int axp288_extcon_probe(struct platform_device *pdev)
 	}
 
 	/* Start charger cable type detection */
-	axp288_extcon_enable(info);
+	ret = axp288_extcon_enable(info);
+	if (ret < 0)
+		return ret;
 
 	device_init_wakeup(dev, true);
 	platform_set_drvdata(pdev, info);

drivers/extcon/extcon-max3355.c

@@ -7,7 +7,6 @@
  */
 
 #include <linux/extcon-provider.h>
-#include <linux/gpio.h>
 #include <linux/gpio/consumer.h>
 #include <linux/interrupt.h>
 #include <linux/module.h>

drivers/extcon/extcon-usb-gpio.c

@@ -7,18 +7,17 @@
  */
 
 #include <linux/extcon-provider.h>
-#include <linux/gpio.h>
 #include <linux/gpio/consumer.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
-#include <linux/of_gpio.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/workqueue.h>
 #include <linux/pinctrl/consumer.h>
+#include <linux/mod_devicetable.h>
 
 #define USB_GPIO_DEBOUNCE_MS	20	/* ms */
 

drivers/extcon/extcon-usbc-tusb320.c

@@ -19,15 +19,42 @@
 #define TUSB320_REG9_ATTACHED_STATE_MASK	0x3
 #define TUSB320_REG9_CABLE_DIRECTION		BIT(5)
 #define TUSB320_REG9_INTERRUPT_STATUS		BIT(4)
-#define TUSB320_ATTACHED_STATE_NONE		0x0
-#define TUSB320_ATTACHED_STATE_DFP		0x1
-#define TUSB320_ATTACHED_STATE_UFP		0x2
-#define TUSB320_ATTACHED_STATE_ACC		0x3
+
+#define TUSB320_REGA				0xa
+#define TUSB320L_REGA_DISABLE_TERM		BIT(0)
+#define TUSB320_REGA_I2C_SOFT_RESET		BIT(3)
+#define TUSB320_REGA_MODE_SELECT_SHIFT		4
+#define TUSB320_REGA_MODE_SELECT_MASK		0x3
+
+#define TUSB320L_REGA0_REVISION			0xa0
+
+enum tusb320_attached_state {
+	TUSB320_ATTACHED_STATE_NONE,
+	TUSB320_ATTACHED_STATE_DFP,
+	TUSB320_ATTACHED_STATE_UFP,
+	TUSB320_ATTACHED_STATE_ACC,
+};
+
+enum tusb320_mode {
+	TUSB320_MODE_PORT,
+	TUSB320_MODE_UFP,
+	TUSB320_MODE_DFP,
+	TUSB320_MODE_DRP,
+};
+
+struct tusb320_priv;
+
+struct tusb320_ops {
+	int (*set_mode)(struct tusb320_priv *priv, enum tusb320_mode mode);
+	int (*get_revision)(struct tusb320_priv *priv, unsigned int *revision);
+};
 
 struct tusb320_priv {
 	struct device *dev;
 	struct regmap *regmap;
 	struct extcon_dev *edev;
+	struct tusb320_ops *ops;
+	enum tusb320_attached_state state;
 };
 
 static const char * const tusb_attached_states[] = {
@@ -62,6 +89,101 @@ static int tusb320_check_signature(struct tusb320_priv *priv)
 	return 0;
 }
 
+static int tusb320_set_mode(struct tusb320_priv *priv, enum tusb320_mode mode)
+{
+	int ret;
+
+	/* Mode cannot be changed while cable is attached */
+	if (priv->state != TUSB320_ATTACHED_STATE_NONE)
+		return -EBUSY;
+
+	/* Write mode */
+	ret = regmap_write_bits(priv->regmap, TUSB320_REGA,
+		TUSB320_REGA_MODE_SELECT_MASK << TUSB320_REGA_MODE_SELECT_SHIFT,
+		mode << TUSB320_REGA_MODE_SELECT_SHIFT);
+	if (ret) {
+		dev_err(priv->dev, "failed to write mode: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int tusb320l_set_mode(struct tusb320_priv *priv, enum tusb320_mode mode)
+{
+	int ret;
+
+	/* Disable CC state machine */
+	ret = regmap_write_bits(priv->regmap, TUSB320_REGA,
+		TUSB320L_REGA_DISABLE_TERM, 1);
+	if (ret) {
+		dev_err(priv->dev,
+			"failed to disable CC state machine: %d\n", ret);
+		return ret;
+	}
+
+	/* Write mode */
+	ret = regmap_write_bits(priv->regmap, TUSB320_REGA,
+		TUSB320_REGA_MODE_SELECT_MASK << TUSB320_REGA_MODE_SELECT_SHIFT,
+		mode << TUSB320_REGA_MODE_SELECT_SHIFT);
+	if (ret) {
+		dev_err(priv->dev, "failed to write mode: %d\n", ret);
+		goto err;
+	}
+
+	msleep(5);
+err:
+	/* Re-enable CC state machine */
+	ret = regmap_write_bits(priv->regmap, TUSB320_REGA,
+		TUSB320L_REGA_DISABLE_TERM, 0);
+	if (ret)
+		dev_err(priv->dev,
+			"failed to re-enable CC state machine: %d\n", ret);
+
+	return ret;
+}
+
+static int tusb320_reset(struct tusb320_priv *priv)
+{
+	int ret;
+
+	/* Set mode to default (follow PORT pin) */
+	ret = priv->ops->set_mode(priv, TUSB320_MODE_PORT);
+	if (ret && ret != -EBUSY) {
+		dev_err(priv->dev,
+			"failed to set mode to PORT: %d\n", ret);
+		return ret;
+	}
+
+	/* Perform soft reset */
+	ret = regmap_write_bits(priv->regmap, TUSB320_REGA,
+			TUSB320_REGA_I2C_SOFT_RESET, 1);
+	if (ret) {
+		dev_err(priv->dev,
+			"failed to write soft reset bit: %d\n", ret);
+		return ret;
+	}
+
+	/* Wait for chip to go through reset */
+	msleep(95);
+
+	return 0;
+}
+
+static int tusb320l_get_revision(struct tusb320_priv *priv, unsigned int *revision)
+{
+	return regmap_read(priv->regmap, TUSB320L_REGA0_REVISION, revision);
+}
+
+static struct tusb320_ops tusb320_ops = {
+	.set_mode = tusb320_set_mode,
+};
+
+static struct tusb320_ops tusb320l_ops = {
+	.set_mode = tusb320l_set_mode,
+	.get_revision = tusb320l_get_revision,
+};
+
 static irqreturn_t tusb320_irq_handler(int irq, void *dev_id)
 {
 	struct tusb320_priv *priv = dev_id;
@@ -96,6 +218,8 @@ static irqreturn_t tusb320_irq_handler(int irq, void *dev_id)
 	extcon_sync(priv->edev, EXTCON_USB);
 	extcon_sync(priv->edev, EXTCON_USB_HOST);
 
+	priv->state = state;
+
 	regmap_write(priv->regmap, TUSB320_REG9, reg);
 
 	return IRQ_HANDLED;
@@ -110,6 +234,8 @@ static int tusb320_extcon_probe(struct i2c_client *client,
 				const struct i2c_device_id *id)
 {
 	struct tusb320_priv *priv;
+	const void *match_data;
+	unsigned int revision;
 	int ret;
 
 	priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
@@ -125,12 +251,27 @@ static int tusb320_extcon_probe(struct i2c_client *client,
 	if (ret)
 		return ret;
 
+	match_data = device_get_match_data(&client->dev);
+	if (!match_data)
+		return -EINVAL;
+
+	priv->ops = (struct tusb320_ops*)match_data;
+
 	priv->edev = devm_extcon_dev_allocate(priv->dev, tusb320_extcon_cable);
 	if (IS_ERR(priv->edev)) {
 		dev_err(priv->dev, "failed to allocate extcon device\n");
 		return PTR_ERR(priv->edev);
 	}
 
+	if (priv->ops->get_revision) {
+		ret = priv->ops->get_revision(priv, &revision);
+		if (ret)
+			dev_warn(priv->dev,
+				"failed to read revision register: %d\n", ret);
+		else
+			dev_info(priv->dev, "chip revision %d\n", revision);
+	}
+
 	ret = devm_extcon_dev_register(priv->dev, priv->edev);
 	if (ret < 0) {
 		dev_err(priv->dev, "failed to register extcon device\n");
@@ -145,6 +286,17 @@ static int tusb320_extcon_probe(struct i2c_client *client,
 	/* update initial state */
 	tusb320_irq_handler(client->irq, priv);
 
+	/* Reset chip to its default state */
+	ret = tusb320_reset(priv);
+	if (ret)
+		dev_warn(priv->dev, "failed to reset chip: %d\n", ret);
+	else
+		/*
+		 * State and polarity might change after a reset, so update
+		 * them again and make sure the interrupt status bit is cleared.
+		 */
+		tusb320_irq_handler(client->irq, priv);
+
 	ret = devm_request_threaded_irq(priv->dev, client->irq, NULL,
 					tusb320_irq_handler,
 					IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
@@ -154,7 +306,8 @@ static int tusb320_extcon_probe(struct i2c_client *client,
 }
 
 static const struct of_device_id tusb320_extcon_dt_match[] = {
-	{ .compatible = "ti,tusb320", },
+	{ .compatible = "ti,tusb320", .data = &tusb320_ops, },
+	{ .compatible = "ti,tusb320l", .data = &tusb320l_ops, },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, tusb320_extcon_dt_match);