diff options
Diffstat (limited to 'drivers/staging/typec/fusb302/fusb302.c')
| -rw-r--r-- | drivers/staging/typec/fusb302/fusb302.c | 144 |
1 files changed, 136 insertions, 8 deletions
diff --git a/drivers/staging/typec/fusb302/fusb302.c b/drivers/staging/typec/fusb302/fusb302.c index 03a3809d18f0..fc6a3cf74eb3 100644 --- a/drivers/staging/typec/fusb302/fusb302.c +++ b/drivers/staging/typec/fusb302/fusb302.c @@ -17,6 +17,7 @@ #include <linux/debugfs.h> #include <linux/delay.h> #include <linux/errno.h> +#include <linux/extcon.h> #include <linux/gpio.h> #include <linux/i2c.h> #include <linux/interrupt.h> @@ -27,6 +28,7 @@ #include <linux/of_device.h> #include <linux/of_gpio.h> #include <linux/pinctrl/consumer.h> +#include <linux/power_supply.h> #include <linux/proc_fs.h> #include <linux/regulator/consumer.h> #include <linux/sched/clock.h> @@ -90,11 +92,13 @@ struct fusb302_chip { struct i2c_client *i2c_client; struct tcpm_port *tcpm_port; struct tcpc_dev tcpc_dev; + struct tcpc_config tcpc_config; struct regulator *vbus; int gpio_int_n; int gpio_int_n_irq; + struct extcon_dev *extcon; struct workqueue_struct *wq; struct delayed_work bc_lvl_handler; @@ -105,6 +109,11 @@ struct fusb302_chip { /* lock for sharing chip states */ struct mutex lock; + /* psy + psy status */ + struct power_supply *psy; + u32 current_limit; + u32 supply_voltage; + /* chip status */ enum toggling_mode toggling_mode; enum src_current_status src_current_status; @@ -515,6 +524,38 @@ static int tcpm_get_vbus(struct tcpc_dev *dev) return ret; } +static int tcpm_get_current_limit(struct tcpc_dev *dev) +{ + struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, + tcpc_dev); + int current_limit = 0; + unsigned long timeout; + + if (!chip->extcon) + return 0; + + /* + * USB2 Charger detection may still be in progress when we get here, + * this can take upto 600ms, wait 800ms max. + */ + timeout = jiffies + msecs_to_jiffies(800); + do { + if (extcon_get_state(chip->extcon, EXTCON_CHG_USB_SDP) == 1) + current_limit = 500; + + if (extcon_get_state(chip->extcon, EXTCON_CHG_USB_CDP) == 1 || + extcon_get_state(chip->extcon, EXTCON_CHG_USB_ACA) == 1) + current_limit = 1500; + + if (extcon_get_state(chip->extcon, EXTCON_CHG_USB_DCP) == 1) + current_limit = 2000; + + msleep(50); + } while (current_limit == 0 && time_before(jiffies, timeout)); + + return current_limit; +} + static int fusb302_set_cc_pull(struct fusb302_chip *chip, bool pull_up, bool pull_down) { @@ -841,11 +882,13 @@ static int tcpm_set_vbus(struct tcpc_dev *dev, bool on, bool charge) chip->vbus_on = on; fusb302_log(chip, "vbus := %s", on ? "On" : "Off"); } - if (chip->charge_on == charge) + if (chip->charge_on == charge) { fusb302_log(chip, "charge is already %s", charge ? "On" : "Off"); - else + } else { chip->charge_on = charge; + power_supply_changed(chip->psy); + } done: mutex_unlock(&chip->lock); @@ -861,6 +904,11 @@ static int tcpm_set_current_limit(struct tcpc_dev *dev, u32 max_ma, u32 mv) fusb302_log(chip, "current limit: %d ma, %d mv (not implemented)", max_ma, mv); + chip->supply_voltage = mv; + chip->current_limit = max_ma; + + power_supply_changed(chip->psy); + return 0; } @@ -1187,9 +1235,9 @@ static const struct tcpc_config fusb302_tcpc_config = { .nr_src_pdo = ARRAY_SIZE(src_pdo), .snk_pdo = snk_pdo, .nr_snk_pdo = ARRAY_SIZE(snk_pdo), - .max_snk_mv = 9000, + .max_snk_mv = 5000, .max_snk_ma = 3000, - .max_snk_mw = 27000, + .max_snk_mw = 15000, .operating_snk_mw = 2500, .type = TYPEC_PORT_DRP, .default_role = TYPEC_SINK, @@ -1198,9 +1246,9 @@ static const struct tcpc_config fusb302_tcpc_config = { static void init_tcpc_dev(struct tcpc_dev *fusb302_tcpc_dev) { - fusb302_tcpc_dev->config = &fusb302_tcpc_config; fusb302_tcpc_dev->init = tcpm_init; fusb302_tcpc_dev->get_vbus = tcpm_get_vbus; + fusb302_tcpc_dev->get_current_limit = tcpm_get_current_limit; fusb302_tcpc_dev->set_cc = tcpm_set_cc; fusb302_tcpc_dev->get_cc = tcpm_get_cc; fusb302_tcpc_dev->set_polarity = tcpm_set_polarity; @@ -1646,6 +1694,43 @@ done: return IRQ_HANDLED; } +static int fusb302_psy_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct fusb302_chip *chip = power_supply_get_drvdata(psy); + + switch (psp) { + case POWER_SUPPLY_PROP_ONLINE: + val->intval = chip->charge_on; + break; + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + val->intval = chip->supply_voltage * 1000; /* mV -> µV */ + break; + case POWER_SUPPLY_PROP_CURRENT_MAX: + val->intval = chip->current_limit * 1000; /* mA -> µA */ + break; + default: + return -ENODATA; + } + + return 0; +} + +static enum power_supply_property fusb302_psy_properties[] = { + POWER_SUPPLY_PROP_ONLINE, + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_CURRENT_MAX, +}; + +static const struct power_supply_desc fusb302_psy_desc = { + .name = "fusb302-typec-source", + .type = POWER_SUPPLY_TYPE_USB_TYPE_C, + .properties = fusb302_psy_properties, + .num_properties = ARRAY_SIZE(fusb302_psy_properties), + .get_property = fusb302_psy_get_property, +}; + static int init_gpio(struct fusb302_chip *chip) { struct device_node *node; @@ -1684,7 +1769,11 @@ static int fusb302_probe(struct i2c_client *client, { struct fusb302_chip *chip; struct i2c_adapter *adapter; + struct device *dev = &client->dev; + struct power_supply_config cfg = {}; + const char *name; int ret = 0; + u32 v; adapter = to_i2c_adapter(client->dev.parent); if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) { @@ -1699,8 +1788,43 @@ static int fusb302_probe(struct i2c_client *client, chip->i2c_client = client; i2c_set_clientdata(client, chip); chip->dev = &client->dev; + chip->tcpc_config = fusb302_tcpc_config; + chip->tcpc_dev.config = &chip->tcpc_config; mutex_init(&chip->lock); + if (!device_property_read_u32(dev, "fcs,max-sink-microvolt", &v)) + chip->tcpc_config.max_snk_mv = v / 1000; + + if (!device_property_read_u32(dev, "fcs,max-sink-microamp", &v)) + chip->tcpc_config.max_snk_ma = v / 1000; + + if (!device_property_read_u32(dev, "fcs,max-sink-microwatt", &v)) + chip->tcpc_config.max_snk_mw = v / 1000; + + if (!device_property_read_u32(dev, "fcs,operating-sink-microwatt", &v)) + chip->tcpc_config.operating_snk_mw = v / 1000; + + /* + * Devicetree platforms should get extcon via phandle (not yet + * supported). On ACPI platforms, we get the name from a device prop. + * This device prop is for kernel internal use only and is expected + * to be set by the platform code which also registers the i2c client + * for the fusb302. + */ + if (device_property_read_string(dev, "fcs,extcon-name", &name) == 0) { + chip->extcon = extcon_get_extcon_dev(name); + if (!chip->extcon) + return -EPROBE_DEFER; + } + + cfg.drv_data = chip; + chip->psy = devm_power_supply_register(dev, &fusb302_psy_desc, &cfg); + if (IS_ERR(chip->psy)) { + ret = PTR_ERR(chip->psy); + dev_err(chip->dev, "Error registering power-supply: %d\n", ret); + return ret; + } + ret = fusb302_debugfs_init(chip); if (ret < 0) return ret; @@ -1719,9 +1843,13 @@ static int fusb302_probe(struct i2c_client *client, goto destroy_workqueue; } - ret = init_gpio(chip); - if (ret < 0) - goto destroy_workqueue; + if (client->irq) { + chip->gpio_int_n_irq = client->irq; + } else { + ret = init_gpio(chip); + if (ret < 0) + goto destroy_workqueue; + } chip->tcpm_port = tcpm_register_port(&client->dev, &chip->tcpc_dev); if (IS_ERR(chip->tcpm_port)) { |