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-rw-r--r--drivers/extcon/Kconfig1
-rw-r--r--drivers/extcon/extcon-axp288.c2
-rw-r--r--drivers/extcon/extcon-fsa9480.c2
-rw-r--r--drivers/extcon/extcon-palmas.c1
-rw-r--r--drivers/extcon/extcon-ptn5150.c2
-rw-r--r--drivers/extcon/extcon-qcom-spmi-misc.c4
-rw-r--r--drivers/extcon/extcon-rt8973a.c2
-rw-r--r--drivers/extcon/extcon-sm5502.c2
-rw-r--r--drivers/extcon/extcon-usbc-tusb320.c155
-rw-r--r--drivers/extcon/extcon.c368
-rw-r--r--drivers/extcon/extcon.h8
11 files changed, 350 insertions, 197 deletions
diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
index 290186e44e6b..0ef1971d22bb 100644
--- a/drivers/extcon/Kconfig
+++ b/drivers/extcon/Kconfig
@@ -185,6 +185,7 @@ config EXTCON_USBC_TUSB320
tristate "TI TUSB320 USB-C extcon support"
depends on I2C && TYPEC
select REGMAP_I2C
+ depends on USB_ROLE_SWITCH || !USB_ROLE_SWITCH
help
Say Y here to enable support for USB Type C cable detection extcon
support using a TUSB320.
diff --git a/drivers/extcon/extcon-axp288.c b/drivers/extcon/extcon-axp288.c
index 180be768c215..a703a8315634 100644
--- a/drivers/extcon/extcon-axp288.c
+++ b/drivers/extcon/extcon-axp288.c
@@ -393,7 +393,7 @@ static int axp288_extcon_probe(struct platform_device *pdev)
adev = acpi_dev_get_first_match_dev("INT3496", NULL, -1);
if (adev) {
info->id_extcon = extcon_get_extcon_dev(acpi_dev_name(adev));
- put_device(&adev->dev);
+ acpi_dev_put(adev);
if (IS_ERR(info->id_extcon))
return PTR_ERR(info->id_extcon);
diff --git a/drivers/extcon/extcon-fsa9480.c b/drivers/extcon/extcon-fsa9480.c
index e8b2671eb29b..e458ce0c45ab 100644
--- a/drivers/extcon/extcon-fsa9480.c
+++ b/drivers/extcon/extcon-fsa9480.c
@@ -369,7 +369,7 @@ static struct i2c_driver fsa9480_i2c_driver = {
.pm = &fsa9480_pm_ops,
.of_match_table = fsa9480_of_match,
},
- .probe_new = fsa9480_probe,
+ .probe = fsa9480_probe,
.id_table = fsa9480_id,
};
diff --git a/drivers/extcon/extcon-palmas.c b/drivers/extcon/extcon-palmas.c
index 32f8b541770b..d339b8680445 100644
--- a/drivers/extcon/extcon-palmas.c
+++ b/drivers/extcon/extcon-palmas.c
@@ -18,7 +18,6 @@
#include <linux/mfd/palmas.h>
#include <linux/of.h>
#include <linux/of_platform.h>
-#include <linux/of_gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/workqueue.h>
diff --git a/drivers/extcon/extcon-ptn5150.c b/drivers/extcon/extcon-ptn5150.c
index 017a07197f38..4616da7e5430 100644
--- a/drivers/extcon/extcon-ptn5150.c
+++ b/drivers/extcon/extcon-ptn5150.c
@@ -348,7 +348,7 @@ static struct i2c_driver ptn5150_i2c_driver = {
.name = "ptn5150",
.of_match_table = ptn5150_dt_match,
},
- .probe_new = ptn5150_i2c_probe,
+ .probe = ptn5150_i2c_probe,
.id_table = ptn5150_i2c_id,
};
module_i2c_driver(ptn5150_i2c_driver);
diff --git a/drivers/extcon/extcon-qcom-spmi-misc.c b/drivers/extcon/extcon-qcom-spmi-misc.c
index eb02cb962b5e..f72e90ceca53 100644
--- a/drivers/extcon/extcon-qcom-spmi-misc.c
+++ b/drivers/extcon/extcon-qcom-spmi-misc.c
@@ -123,7 +123,7 @@ static int qcom_usb_extcon_probe(struct platform_device *pdev)
if (ret)
return ret;
- info->id_irq = platform_get_irq_byname(pdev, "usb_id");
+ info->id_irq = platform_get_irq_byname_optional(pdev, "usb_id");
if (info->id_irq > 0) {
ret = devm_request_threaded_irq(dev, info->id_irq, NULL,
qcom_usb_irq_handler,
@@ -136,7 +136,7 @@ static int qcom_usb_extcon_probe(struct platform_device *pdev)
}
}
- info->vbus_irq = platform_get_irq_byname(pdev, "usb_vbus");
+ info->vbus_irq = platform_get_irq_byname_optional(pdev, "usb_vbus");
if (info->vbus_irq > 0) {
ret = devm_request_threaded_irq(dev, info->vbus_irq, NULL,
qcom_usb_irq_handler,
diff --git a/drivers/extcon/extcon-rt8973a.c b/drivers/extcon/extcon-rt8973a.c
index afc9b405d103..19bb49f13fb0 100644
--- a/drivers/extcon/extcon-rt8973a.c
+++ b/drivers/extcon/extcon-rt8973a.c
@@ -695,7 +695,7 @@ static struct i2c_driver rt8973a_muic_i2c_driver = {
.pm = &rt8973a_muic_pm_ops,
.of_match_table = rt8973a_dt_match,
},
- .probe_new = rt8973a_muic_i2c_probe,
+ .probe = rt8973a_muic_i2c_probe,
.remove = rt8973a_muic_i2c_remove,
.id_table = rt8973a_i2c_id,
};
diff --git a/drivers/extcon/extcon-sm5502.c b/drivers/extcon/extcon-sm5502.c
index 8401e8b27788..c8c4b9ef72aa 100644
--- a/drivers/extcon/extcon-sm5502.c
+++ b/drivers/extcon/extcon-sm5502.c
@@ -840,7 +840,7 @@ static struct i2c_driver sm5502_muic_i2c_driver = {
.pm = &sm5502_muic_pm_ops,
.of_match_table = sm5502_dt_match,
},
- .probe_new = sm5022_muic_i2c_probe,
+ .probe = sm5022_muic_i2c_probe,
.id_table = sm5502_i2c_id,
};
diff --git a/drivers/extcon/extcon-usbc-tusb320.c b/drivers/extcon/extcon-usbc-tusb320.c
index b408ce989c22..4d08c2123e59 100644
--- a/drivers/extcon/extcon-usbc-tusb320.c
+++ b/drivers/extcon/extcon-usbc-tusb320.c
@@ -15,6 +15,8 @@
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/usb/typec.h>
+#include <linux/usb/typec_altmode.h>
+#include <linux/usb/role.h>
#define TUSB320_REG8 0x8
#define TUSB320_REG8_CURRENT_MODE_ADVERTISE GENMASK(7, 6)
@@ -26,16 +28,16 @@
#define TUSB320_REG8_CURRENT_MODE_DETECT_MED 0x1
#define TUSB320_REG8_CURRENT_MODE_DETECT_ACC 0x2
#define TUSB320_REG8_CURRENT_MODE_DETECT_HI 0x3
-#define TUSB320_REG8_ACCESSORY_CONNECTED GENMASK(3, 2)
+#define TUSB320_REG8_ACCESSORY_CONNECTED GENMASK(3, 1)
#define TUSB320_REG8_ACCESSORY_CONNECTED_NONE 0x0
#define TUSB320_REG8_ACCESSORY_CONNECTED_AUDIO 0x4
-#define TUSB320_REG8_ACCESSORY_CONNECTED_ACC 0x5
-#define TUSB320_REG8_ACCESSORY_CONNECTED_DEBUG 0x6
+#define TUSB320_REG8_ACCESSORY_CONNECTED_ACHRG 0x5
+#define TUSB320_REG8_ACCESSORY_CONNECTED_DBGDFP 0x6
+#define TUSB320_REG8_ACCESSORY_CONNECTED_DBGUFP 0x7
#define TUSB320_REG8_ACTIVE_CABLE_DETECTION BIT(0)
#define TUSB320_REG9 0x9
-#define TUSB320_REG9_ATTACHED_STATE_SHIFT 6
-#define TUSB320_REG9_ATTACHED_STATE_MASK 0x3
+#define TUSB320_REG9_ATTACHED_STATE GENMASK(7, 6)
#define TUSB320_REG9_CABLE_DIRECTION BIT(5)
#define TUSB320_REG9_INTERRUPT_STATUS BIT(4)
@@ -78,6 +80,8 @@ struct tusb320_priv {
struct typec_capability cap;
enum typec_port_type port_type;
enum typec_pwr_opmode pwr_opmode;
+ struct fwnode_handle *connector_fwnode;
+ struct usb_role_switch *role_sw;
};
static const char * const tusb_attached_states[] = {
@@ -249,8 +253,7 @@ static void tusb320_extcon_irq_handler(struct tusb320_priv *priv, u8 reg)
{
int state, polarity;
- state = (reg >> TUSB320_REG9_ATTACHED_STATE_SHIFT) &
- TUSB320_REG9_ATTACHED_STATE_MASK;
+ state = FIELD_GET(TUSB320_REG9_ATTACHED_STATE, reg);
polarity = !!(reg & TUSB320_REG9_CABLE_DIRECTION);
dev_dbg(priv->dev, "attached state: %s, polarity: %d\n",
@@ -276,32 +279,86 @@ static void tusb320_typec_irq_handler(struct tusb320_priv *priv, u8 reg9)
{
struct typec_port *port = priv->port;
struct device *dev = priv->dev;
- u8 mode, role, state;
+ int typec_mode;
+ enum usb_role usb_role;
+ enum typec_role pwr_role;
+ enum typec_data_role data_role;
+ u8 state, mode, accessory;
int ret, reg8;
bool ori;
+ ret = regmap_read(priv->regmap, TUSB320_REG8, &reg8);
+ if (ret) {
+ dev_err(dev, "error during reg8 i2c read, ret=%d!\n", ret);
+ return;
+ }
+
ori = reg9 & TUSB320_REG9_CABLE_DIRECTION;
typec_set_orientation(port, ori ? TYPEC_ORIENTATION_REVERSE :
TYPEC_ORIENTATION_NORMAL);
- state = (reg9 >> TUSB320_REG9_ATTACHED_STATE_SHIFT) &
- TUSB320_REG9_ATTACHED_STATE_MASK;
- if (state == TUSB320_ATTACHED_STATE_DFP)
- role = TYPEC_SOURCE;
- else
- role = TYPEC_SINK;
+ state = FIELD_GET(TUSB320_REG9_ATTACHED_STATE, reg9);
+ accessory = FIELD_GET(TUSB320_REG8_ACCESSORY_CONNECTED, reg8);
+
+ switch (state) {
+ case TUSB320_ATTACHED_STATE_DFP:
+ typec_mode = TYPEC_MODE_USB2;
+ usb_role = USB_ROLE_HOST;
+ pwr_role = TYPEC_SOURCE;
+ data_role = TYPEC_HOST;
+ break;
+ case TUSB320_ATTACHED_STATE_UFP:
+ typec_mode = TYPEC_MODE_USB2;
+ usb_role = USB_ROLE_DEVICE;
+ pwr_role = TYPEC_SINK;
+ data_role = TYPEC_DEVICE;
+ break;
+ case TUSB320_ATTACHED_STATE_ACC:
+ /*
+ * Accessory detected. For debug accessories, just make some
+ * qualified guesses as to the role for lack of a better option.
+ */
+ if (accessory == TUSB320_REG8_ACCESSORY_CONNECTED_AUDIO ||
+ accessory == TUSB320_REG8_ACCESSORY_CONNECTED_ACHRG) {
+ typec_mode = TYPEC_MODE_AUDIO;
+ usb_role = USB_ROLE_NONE;
+ pwr_role = TYPEC_SINK;
+ data_role = TYPEC_DEVICE;
+ break;
+ } else if (accessory ==
+ TUSB320_REG8_ACCESSORY_CONNECTED_DBGDFP) {
+ typec_mode = TYPEC_MODE_DEBUG;
+ pwr_role = TYPEC_SOURCE;
+ usb_role = USB_ROLE_HOST;
+ data_role = TYPEC_HOST;
+ break;
+ } else if (accessory ==
+ TUSB320_REG8_ACCESSORY_CONNECTED_DBGUFP) {
+ typec_mode = TYPEC_MODE_DEBUG;
+ pwr_role = TYPEC_SINK;
+ usb_role = USB_ROLE_DEVICE;
+ data_role = TYPEC_DEVICE;
+ break;
+ }
- typec_set_vconn_role(port, role);
- typec_set_pwr_role(port, role);
- typec_set_data_role(port, role == TYPEC_SOURCE ?
- TYPEC_HOST : TYPEC_DEVICE);
+ dev_warn(priv->dev, "unexpected ACCESSORY_CONNECTED state %d\n",
+ accessory);
- ret = regmap_read(priv->regmap, TUSB320_REG8, &reg8);
- if (ret) {
- dev_err(dev, "error during reg8 i2c read, ret=%d!\n", ret);
- return;
+ fallthrough;
+ default:
+ typec_mode = TYPEC_MODE_USB2;
+ usb_role = USB_ROLE_NONE;
+ pwr_role = TYPEC_SINK;
+ data_role = TYPEC_DEVICE;
+ break;
}
+ typec_set_vconn_role(port, pwr_role);
+ typec_set_pwr_role(port, pwr_role);
+ typec_set_data_role(port, data_role);
+ typec_set_mode(port, typec_mode);
+ usb_role_switch_set_role(priv->role_sw, usb_role);
+
mode = FIELD_GET(TUSB320_REG8_CURRENT_MODE_DETECT, reg8);
if (mode == TUSB320_REG8_CURRENT_MODE_DETECT_DEF)
typec_set_pwr_opmode(port, TYPEC_PWR_MODE_USB);
@@ -391,27 +448,25 @@ static int tusb320_typec_probe(struct i2c_client *client,
/* Type-C connector found. */
ret = typec_get_fw_cap(&priv->cap, connector);
if (ret)
- return ret;
+ goto err_put;
priv->port_type = priv->cap.type;
/* This goes into register 0x8 field CURRENT_MODE_ADVERTISE */
ret = fwnode_property_read_string(connector, "typec-power-opmode", &cap_str);
if (ret)
- return ret;
+ goto err_put;
ret = typec_find_pwr_opmode(cap_str);
if (ret < 0)
- return ret;
- if (ret == TYPEC_PWR_MODE_PD)
- return -EINVAL;
+ goto err_put;
priv->pwr_opmode = ret;
/* Initialize the hardware with the devicetree settings. */
ret = tusb320_set_adv_pwr_mode(priv);
if (ret)
- return ret;
+ goto err_put;
priv->cap.revision = USB_TYPEC_REV_1_1;
priv->cap.accessory[0] = TYPEC_ACCESSORY_AUDIO;
@@ -422,10 +477,36 @@ static int tusb320_typec_probe(struct i2c_client *client,
priv->cap.fwnode = connector;
priv->port = typec_register_port(&client->dev, &priv->cap);
- if (IS_ERR(priv->port))
- return PTR_ERR(priv->port);
+ if (IS_ERR(priv->port)) {
+ ret = PTR_ERR(priv->port);
+ goto err_put;
+ }
+
+ /* Find any optional USB role switch that needs reporting to */
+ priv->role_sw = fwnode_usb_role_switch_get(connector);
+ if (IS_ERR(priv->role_sw)) {
+ ret = PTR_ERR(priv->role_sw);
+ goto err_unreg;
+ }
+
+ priv->connector_fwnode = connector;
return 0;
+
+err_unreg:
+ typec_unregister_port(priv->port);
+
+err_put:
+ fwnode_handle_put(connector);
+
+ return ret;
+}
+
+static void tusb320_typec_remove(struct tusb320_priv *priv)
+{
+ usb_role_switch_put(priv->role_sw);
+ typec_unregister_port(priv->port);
+ fwnode_handle_put(priv->connector_fwnode);
}
static int tusb320_probe(struct i2c_client *client)
@@ -438,7 +519,9 @@ static int tusb320_probe(struct i2c_client *client)
priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
+
priv->dev = &client->dev;
+ i2c_set_clientdata(client, priv);
priv->regmap = devm_regmap_init_i2c(client, &tusb320_regmap_config);
if (IS_ERR(priv->regmap))
@@ -489,10 +572,19 @@ static int tusb320_probe(struct i2c_client *client)
tusb320_irq_handler,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
client->name, priv);
+ if (ret)
+ tusb320_typec_remove(priv);
return ret;
}
+static void tusb320_remove(struct i2c_client *client)
+{
+ struct tusb320_priv *priv = i2c_get_clientdata(client);
+
+ tusb320_typec_remove(priv);
+}
+
static const struct of_device_id tusb320_extcon_dt_match[] = {
{ .compatible = "ti,tusb320", .data = &tusb320_ops, },
{ .compatible = "ti,tusb320l", .data = &tusb320l_ops, },
@@ -501,7 +593,8 @@ static const struct of_device_id tusb320_extcon_dt_match[] = {
MODULE_DEVICE_TABLE(of, tusb320_extcon_dt_match);
static struct i2c_driver tusb320_extcon_driver = {
- .probe_new = tusb320_probe,
+ .probe = tusb320_probe,
+ .remove = tusb320_remove,
.driver = {
.name = "extcon-tusb320",
.of_match_table = tusb320_extcon_dt_match,
diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c
index d43ba8e7260d..6f7a60d2ed91 100644
--- a/drivers/extcon/extcon.c
+++ b/drivers/extcon/extcon.c
@@ -16,6 +16,7 @@
#include <linux/module.h>
#include <linux/types.h>
+#include <linux/idr.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/fs.h>
@@ -206,6 +207,14 @@ static const struct __extcon_info {
* @attr_name: "name" sysfs entry
* @attr_state: "state" sysfs entry
* @attrs: the array pointing to attr_name and attr_state for attr_g
+ * @usb_propval: the array of USB connector properties
+ * @chg_propval: the array of charger connector properties
+ * @jack_propval: the array of jack connector properties
+ * @disp_propval: the array of display connector properties
+ * @usb_bits: the bit array of the USB connector property capabilities
+ * @chg_bits: the bit array of the charger connector property capabilities
+ * @jack_bits: the bit array of the jack connector property capabilities
+ * @disp_bits: the bit array of the display connector property capabilities
*/
struct extcon_cable {
struct extcon_dev *edev;
@@ -222,20 +231,21 @@ struct extcon_cable {
union extcon_property_value jack_propval[EXTCON_PROP_JACK_CNT];
union extcon_property_value disp_propval[EXTCON_PROP_DISP_CNT];
- unsigned long usb_bits[BITS_TO_LONGS(EXTCON_PROP_USB_CNT)];
- unsigned long chg_bits[BITS_TO_LONGS(EXTCON_PROP_CHG_CNT)];
- unsigned long jack_bits[BITS_TO_LONGS(EXTCON_PROP_JACK_CNT)];
- unsigned long disp_bits[BITS_TO_LONGS(EXTCON_PROP_DISP_CNT)];
+ DECLARE_BITMAP(usb_bits, EXTCON_PROP_USB_CNT);
+ DECLARE_BITMAP(chg_bits, EXTCON_PROP_CHG_CNT);
+ DECLARE_BITMAP(jack_bits, EXTCON_PROP_JACK_CNT);
+ DECLARE_BITMAP(disp_bits, EXTCON_PROP_DISP_CNT);
};
static struct class *extcon_class;
+static DEFINE_IDA(extcon_dev_ids);
static LIST_HEAD(extcon_dev_list);
static DEFINE_MUTEX(extcon_dev_list_lock);
static int check_mutually_exclusive(struct extcon_dev *edev, u32 new_state)
{
- int i = 0;
+ int i;
if (!edev->mutually_exclusive)
return 0;
@@ -362,12 +372,12 @@ static ssize_t state_show(struct device *dev, struct device_attribute *attr,
struct extcon_dev *edev = dev_get_drvdata(dev);
if (edev->max_supported == 0)
- return sprintf(buf, "%u\n", edev->state);
+ return sysfs_emit(buf, "%u\n", edev->state);
for (i = 0; i < edev->max_supported; i++) {
- count += sprintf(buf + count, "%s=%d\n",
- extcon_info[edev->supported_cable[i]].name,
- !!(edev->state & BIT(i)));
+ count += sysfs_emit_at(buf, count, "%s=%d\n",
+ extcon_info[edev->supported_cable[i]].name,
+ !!(edev->state & BIT(i)));
}
return count;
@@ -379,7 +389,7 @@ static ssize_t name_show(struct device *dev, struct device_attribute *attr,
{
struct extcon_dev *edev = dev_get_drvdata(dev);
- return sprintf(buf, "%s\n", edev->name);
+ return sysfs_emit(buf, "%s\n", edev->name);
}
static DEVICE_ATTR_RO(name);
@@ -390,8 +400,8 @@ static ssize_t cable_name_show(struct device *dev,
attr_name);
int i = cable->cable_index;
- return sprintf(buf, "%s\n",
- extcon_info[cable->edev->supported_cable[i]].name);
+ return sysfs_emit(buf, "%s\n",
+ extcon_info[cable->edev->supported_cable[i]].name);
}
static ssize_t cable_state_show(struct device *dev,
@@ -402,8 +412,8 @@ static ssize_t cable_state_show(struct device *dev,
int i = cable->cable_index;
- return sprintf(buf, "%d\n",
- extcon_get_state(cable->edev, cable->edev->supported_cable[i]));
+ return sysfs_emit(buf, "%d\n",
+ extcon_get_state(cable->edev, cable->edev->supported_cable[i]));
}
/**
@@ -1012,12 +1022,13 @@ ATTRIBUTE_GROUPS(extcon);
static int create_extcon_class(void)
{
- if (!extcon_class) {
- extcon_class = class_create("extcon");
- if (IS_ERR(extcon_class))
- return PTR_ERR(extcon_class);
- extcon_class->dev_groups = extcon_groups;
- }
+ if (extcon_class)
+ return 0;
+
+ extcon_class = class_create("extcon");
+ if (IS_ERR(extcon_class))
+ return PTR_ERR(extcon_class);
+ extcon_class->dev_groups = extcon_groups;
return 0;
}
@@ -1070,6 +1081,156 @@ void extcon_dev_free(struct extcon_dev *edev)
EXPORT_SYMBOL_GPL(extcon_dev_free);
/**
+ * extcon_alloc_cables() - alloc the cables for extcon device
+ * @edev: extcon device which has cables
+ *
+ * Returns 0 if success or error number if fail.
+ */
+static int extcon_alloc_cables(struct extcon_dev *edev)
+{
+ int index;
+ char *str;
+ struct extcon_cable *cable;
+
+ if (!edev)
+ return -EINVAL;
+
+ if (!edev->max_supported)
+ return 0;
+
+ edev->cables = kcalloc(edev->max_supported, sizeof(*edev->cables),
+ GFP_KERNEL);
+ if (!edev->cables)
+ return -ENOMEM;
+
+ for (index = 0; index < edev->max_supported; index++) {
+ cable = &edev->cables[index];
+
+ str = kasprintf(GFP_KERNEL, "cable.%d", index);
+ if (!str) {
+ for (index--; index >= 0; index--) {
+ cable = &edev->cables[index];
+ kfree(cable->attr_g.name);
+ }
+
+ kfree(edev->cables);
+ return -ENOMEM;
+ }
+
+ cable->edev = edev;
+ cable->cable_index = index;
+ cable->attrs[0] = &cable->attr_name.attr;
+ cable->attrs[1] = &cable->attr_state.attr;
+ cable->attrs[2] = NULL;
+ cable->attr_g.name = str;
+ cable->attr_g.attrs = cable->attrs;
+
+ sysfs_attr_init(&cable->attr_name.attr);
+ cable->attr_name.attr.name = "name";
+ cable->attr_name.attr.mode = 0444;
+ cable->attr_name.show = cable_name_show;
+
+ sysfs_attr_init(&cable->attr_state.attr);
+ cable->attr_state.attr.name = "state";
+ cable->attr_state.attr.mode = 0444;
+ cable->attr_state.show = cable_state_show;
+ }
+
+ return 0;
+}
+
+/**
+ * extcon_alloc_muex() - alloc the mutual exclusive for extcon device
+ * @edev: extcon device
+ *
+ * Returns 0 if success or error number if fail.
+ */
+static int extcon_alloc_muex(struct extcon_dev *edev)
+{
+ char *name;
+ int index;
+
+ if (!edev)
+ return -EINVAL;
+
+ if (!(edev->max_supported && edev->mutually_exclusive))
+ return 0;
+
+ /* Count the size of mutually_exclusive array */
+ for (index = 0; edev->mutually_exclusive[index]; index++)
+ ;
+
+ edev->attrs_muex = kcalloc(index + 1, sizeof(*edev->attrs_muex),
+ GFP_KERNEL);
+ if (!edev->attrs_muex)
+ return -ENOMEM;
+
+ edev->d_attrs_muex = kcalloc(index, sizeof(*edev->d_attrs_muex),
+ GFP_KERNEL);
+ if (!edev->d_attrs_muex) {
+ kfree(edev->attrs_muex);
+ return -ENOMEM;
+ }
+
+ for (index = 0; edev->mutually_exclusive[index]; index++) {
+ name = kasprintf(GFP_KERNEL, "0x%x",
+ edev->mutually_exclusive[index]);
+ if (!name) {
+ for (index--; index >= 0; index--)
+ kfree(edev->d_attrs_muex[index].attr.name);
+
+ kfree(edev->d_attrs_muex);
+ kfree(edev->attrs_muex);
+ return -ENOMEM;
+ }
+ sysfs_attr_init(&edev->d_attrs_muex[index].attr);
+ edev->d_attrs_muex[index].attr.name = name;
+ edev->d_attrs_muex[index].attr.mode = 0000;
+ edev->attrs_muex[index] = &edev->d_attrs_muex[index].attr;
+ }
+ edev->attr_g_muex.name = muex_name;
+ edev->attr_g_muex.attrs = edev->attrs_muex;
+
+ return 0;
+}
+
+/**
+ * extcon_alloc_groups() - alloc the groups for extcon device
+ * @edev: extcon device
+ *
+ * Returns 0 if success or error number if fail.
+ */
+static int extcon_alloc_groups(struct extcon_dev *edev)
+{
+ int index;
+
+ if (!edev)
+ return -EINVAL;
+
+ if (!edev->max_supported)
+ return 0;
+
+ edev->extcon_dev_type.groups = kcalloc(edev->max_supported + 2,
+ sizeof(*edev->extcon_dev_type.groups),
+ GFP_KERNEL);
+ if (!edev->extcon_dev_type.groups)
+ return -ENOMEM;
+
+ edev->extcon_dev_type.name = dev_name(&edev->dev);
+ edev->extcon_dev_type.release = dummy_sysfs_dev_release;
+
+ for (index = 0; index < edev->max_supported; index++)
+ edev->extcon_dev_type.groups[index] = &edev->cables[index].attr_g;
+
+ if (edev->mutually_exclusive)
+ edev->extcon_dev_type.groups[index] = &edev->attr_g_muex;
+
+ edev->dev.type = &edev->extcon_dev_type;
+
+ return 0;
+}
+
+/**
* extcon_dev_register() - Register an new extcon device
* @edev: the extcon device to be registered
*
@@ -1085,19 +1246,16 @@ EXPORT_SYMBOL_GPL(extcon_dev_free);
*/
int extcon_dev_register(struct extcon_dev *edev)
{
- int ret, index = 0;
- static atomic_t edev_no = ATOMIC_INIT(-1);
+ int ret, index;
- if (!extcon_class) {
- ret = create_extcon_class();
- if (ret < 0)
- return ret;
- }
+ ret = create_extcon_class();
+ if (ret < 0)
+ return ret;
if (!edev || !edev->supported_cable)
return -EINVAL;
- for (; edev->supported_cable[index] != EXTCON_NONE; index++);
+ for (index = 0; edev->supported_cable[index] != EXTCON_NONE; index++);
edev->max_supported = index;
if (index > SUPPORTED_CABLE_MAX) {
@@ -1115,124 +1273,26 @@ int extcon_dev_register(struct extcon_dev *edev)
"extcon device name is null\n");
return -EINVAL;
}
- dev_set_name(&edev->dev, "extcon%lu",
- (unsigned long)atomic_inc_return(&edev_no));
-
- if (edev->max_supported) {
- char *str;
- struct extcon_cable *cable;
-
- edev->cables = kcalloc(edev->max_supported,
- sizeof(struct extcon_cable),
- GFP_KERNEL);
- if (!edev->cables) {
- ret = -ENOMEM;
- goto err_sysfs_alloc;
- }
- for (index = 0; index < edev->max_supported; index++) {
- cable = &edev->cables[index];
-
- str = kasprintf(GFP_KERNEL, "cable.%d", index);
- if (!str) {
- for (index--; index >= 0; index--) {
- cable = &edev->cables[index];
- kfree(cable->attr_g.name);
- }
- ret = -ENOMEM;
-
- goto err_alloc_cables;
- }
-
- cable->edev = edev;
- cable->cable_index = index;
- cable->attrs[0] = &cable->attr_name.attr;
- cable->attrs[1] = &cable->attr_state.attr;
- cable->attrs[2] = NULL;
- cable->attr_g.name = str;
- cable->attr_g.attrs = cable->attrs;
-
- sysfs_attr_init(&cable->attr_name.attr);
- cable->attr_name.attr.name = "name";
- cable->attr_name.attr.mode = 0444;
- cable->attr_name.show = cable_name_show;
-
- sysfs_attr_init(&cable->attr_state.attr);
- cable->attr_state.attr.name = "state";
- cable->attr_state.attr.mode = 0444;
- cable->attr_state.show = cable_state_show;
- }
- }
- if (edev->max_supported && edev->mutually_exclusive) {
- char *name;
-
- /* Count the size of mutually_exclusive array */
- for (index = 0; edev->mutually_exclusive[index]; index++)
- ;
-
- edev->attrs_muex = kcalloc(index + 1,
- sizeof(struct attribute *),
- GFP_KERNEL);
- if (!edev->attrs_muex) {
- ret = -ENOMEM;
- goto err_muex;
- }
-
- edev->d_attrs_muex = kcalloc(index,
- sizeof(struct device_attribute),
- GFP_KERNEL);
- if (!edev->d_attrs_muex) {
- ret = -ENOMEM;
- kfree(edev->attrs_muex);
- goto err_muex;
- }
-
- for (index = 0; edev->mutually_exclusive[index]; index++) {
- name = kasprintf(GFP_KERNEL, "0x%x",
- edev->mutually_exclusive[index]);
- if (!name) {
- for (index--; index >= 0; index--) {
- kfree(edev->d_attrs_muex[index].attr.
- name);
- }
- kfree(edev->d_attrs_muex);
- kfree(edev->attrs_muex);
- ret = -ENOMEM;
- goto err_muex;
- }
- sysfs_attr_init(&edev->d_attrs_muex[index].attr);
- edev->d_attrs_muex[index].attr.name = name;
- edev->d_attrs_muex[index].attr.mode = 0000;
- edev->attrs_muex[index] = &edev->d_attrs_muex[index]
- .attr;
- }
- edev->attr_g_muex.name = muex_name;
- edev->attr_g_muex.attrs = edev->attrs_muex;
+ ret = ida_alloc(&extcon_dev_ids, GFP_KERNEL);
+ if (ret < 0)
+ return ret;
- }
+ edev->id = ret;
- if (edev->max_supported) {
- edev->extcon_dev_type.groups =
- kcalloc(edev->max_supported + 2,
- sizeof(struct attribute_group *),
- GFP_KERNEL);
- if (!edev->extcon_dev_type.groups) {
- ret = -ENOMEM;
- goto err_alloc_groups;
- }
+ dev_set_name(&edev->dev, "extcon%d", edev->id);
- edev->extcon_dev_type.name = dev_name(&edev->dev);
- edev->extcon_dev_type.release = dummy_sysfs_dev_release;
+ ret = extcon_alloc_cables(edev);
+ if (ret < 0)
+ goto err_alloc_cables;
- for (index = 0; index < edev->max_supported; index++)
- edev->extcon_dev_type.groups[index] =
- &edev->cables[index].attr_g;
- if (edev->mutually_exclusive)
- edev->extcon_dev_type.groups[index] =
- &edev->attr_g_muex;
+ ret = extcon_alloc_muex(edev);
+ if (ret < 0)
+ goto err_alloc_muex;
- edev->dev.type = &edev->extcon_dev_type;
- }
+ ret = extcon_alloc_groups(edev);
+ if (ret < 0)
+ goto err_alloc_groups;
spin_lock_init(&edev->lock);
if (edev->max_supported) {
@@ -1277,13 +1337,14 @@ err_alloc_groups:
kfree(edev->d_attrs_muex);
kfree(edev->attrs_muex);
}
-err_muex:
+err_alloc_muex:
for (index = 0; index < edev->max_supported; index++)
kfree(edev->cables[index].attr_g.name);
-err_alloc_cables:
if (edev->max_supported)
kfree(edev->cables);
-err_sysfs_alloc:
+err_alloc_cables:
+ ida_free(&extcon_dev_ids, edev->id);
+
return ret;
}
EXPORT_SYMBOL_GPL(extcon_dev_register);
@@ -1306,12 +1367,13 @@ void extcon_dev_unregister(struct extcon_dev *edev)
list_del(&edev->entry);
mutex_unlock(&extcon_dev_list_lock);
- if (IS_ERR_OR_NULL(get_device(&edev->dev))) {
- dev_err(&edev->dev, "Failed to unregister extcon_dev (%s)\n",
- dev_name(&edev->dev));
+ if (!get_device(&edev->dev)) {
+ dev_err(&edev->dev, "Failed to unregister extcon_dev\n");
return;
}
+ ida_free(&extcon_dev_ids, edev->id);
+
device_unregister(&edev->dev);
if (edev->mutually_exclusive && edev->max_supported) {
@@ -1349,7 +1411,7 @@ struct extcon_dev *extcon_find_edev_by_node(struct device_node *node)
mutex_lock(&extcon_dev_list_lock);
list_for_each_entry(edev, &extcon_dev_list, entry)
- if (edev->dev.parent && edev->dev.parent->of_node == node)
+ if (edev->dev.parent && device_match_of_node(edev->dev.parent, node))
goto out;
edev = ERR_PTR(-EPROBE_DEFER);
out:
@@ -1367,21 +1429,17 @@ out:
*/
struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index)
{
- struct device_node *node;
+ struct device_node *node, *np = dev_of_node(dev);
struct extcon_dev *edev;
- if (!dev)
- return ERR_PTR(-EINVAL);
-
- if (!dev->of_node) {
+ if (!np) {
dev_dbg(dev, "device does not have a device node entry\n");
return ERR_PTR(-EINVAL);
}
- node = of_parse_phandle(dev->of_node, "extcon", index);
+ node = of_parse_phandle(np, "extcon", index);
if (!node) {
- dev_dbg(dev, "failed to get phandle in %pOF node\n",
- dev->of_node);
+ dev_dbg(dev, "failed to get phandle in %pOF node\n", np);
return ERR_PTR(-ENODEV);
}
diff --git a/drivers/extcon/extcon.h b/drivers/extcon/extcon.h
index 93b5e0306966..946182687786 100644
--- a/drivers/extcon/extcon.h
+++ b/drivers/extcon/extcon.h
@@ -13,13 +13,14 @@
* are disabled.
* @mutually_exclusive: Array of mutually exclusive set of cables that cannot
* be attached simultaneously. The array should be
- * ending with NULL or be NULL (no mutually exclusive
- * cables). For example, if it is { 0x7, 0x30, 0}, then,
+ * ending with 0 or be NULL (no mutually exclusive cables).
+ * For example, if it is {0x7, 0x30, 0}, then,
* {0, 1}, {0, 1, 2}, {0, 2}, {1, 2}, or {4, 5} cannot
* be attached simulataneously. {0x7, 0} is equivalent to
* {0x3, 0x6, 0x5, 0}. If it is {0xFFFFFFFF, 0}, there
* can be no simultaneous connections.
* @dev: Device of this extcon.
+ * @id: Unique device ID of this extcon.
* @state: Attach/detach state of this extcon. Do not provide at
* register-time.
* @nh_all: Notifier for the state change events for all supported
@@ -27,7 +28,7 @@
* @nh: Notifier for the state change events from this extcon
* @entry: To support list of extcon devices so that users can
* search for extcon devices based on the extcon name.
- * @lock:
+ * @lock: Protects device state and serialises device registration
* @max_supported: Internal value to store the number of cables.
* @extcon_dev_type: Device_type struct to provide attribute_groups
* customized for each extcon device.
@@ -46,6 +47,7 @@ struct extcon_dev {
/* Internal data. Please do not set. */
struct device dev;
+ unsigned int id;
struct raw_notifier_head nh_all;
struct raw_notifier_head *nh;
struct list_head entry;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.