diff options
Diffstat (limited to 'drivers/usb/typec/tps6598x.c')
| -rw-r--r-- | drivers/usb/typec/tps6598x.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/drivers/usb/typec/tps6598x.c b/drivers/usb/typec/tps6598x.c index 3db33bb622c3..6e6ef6317523 100644 --- a/drivers/usb/typec/tps6598x.c +++ b/drivers/usb/typec/tps6598x.c @@ -9,6 +9,7 @@ #include <linux/i2c.h> #include <linux/acpi.h> #include <linux/module.h> +#include <linux/power_supply.h> #include <linux/regmap.h> #include <linux/interrupt.h> #include <linux/usb/typec.h> @@ -55,6 +56,7 @@ enum { }; /* TPS_REG_POWER_STATUS bits */ +#define TPS_POWER_STATUS_CONNECTION BIT(0) #define TPS_POWER_STATUS_SOURCESINK BIT(1) #define TPS_POWER_STATUS_PWROPMODE(p) (((p) & GENMASK(3, 2)) >> 2) @@ -96,8 +98,25 @@ struct tps6598x { struct typec_partner *partner; struct usb_pd_identity partner_identity; struct usb_role_switch *role_sw; + struct typec_capability typec_cap; + + struct power_supply *psy; + struct power_supply_desc psy_desc; + enum power_supply_usb_type usb_type; +}; + +static enum power_supply_property tps6598x_psy_props[] = { + POWER_SUPPLY_PROP_USB_TYPE, + POWER_SUPPLY_PROP_ONLINE, }; +static enum power_supply_usb_type tps6598x_psy_usb_types[] = { + POWER_SUPPLY_USB_TYPE_C, + POWER_SUPPLY_USB_TYPE_PD, +}; + +static const char *tps6598x_psy_name_prefix = "tps6598x-source-psy-"; + /* * Max data bytes for Data1, Data2, and other registers. See ch 1.3.2: * https://www.ti.com/lit/ug/slvuan1a/slvuan1a.pdf @@ -248,6 +267,8 @@ static int tps6598x_connect(struct tps6598x *tps, u32 status) if (desc.identity) typec_partner_set_identity(tps->partner); + power_supply_changed(tps->psy); + return 0; } @@ -260,6 +281,7 @@ static void tps6598x_disconnect(struct tps6598x *tps, u32 status) typec_set_pwr_role(tps->port, TPS_STATUS_PORTROLE(status)); typec_set_vconn_role(tps->port, TPS_STATUS_VCONN(status)); tps6598x_set_data_role(tps, TPS_STATUS_DATAROLE(status), false); + power_supply_changed(tps->psy); } static int tps6598x_exec_cmd(struct tps6598x *tps, const char *cmd, @@ -467,6 +489,83 @@ static const struct regmap_config tps6598x_regmap_config = { .max_register = 0x7F, }; +static int tps6598x_psy_get_online(struct tps6598x *tps, + union power_supply_propval *val) +{ + int ret; + u16 pwr_status; + + ret = tps6598x_read16(tps, TPS_REG_POWER_STATUS, &pwr_status); + if (ret < 0) + return ret; + + if ((pwr_status & TPS_POWER_STATUS_CONNECTION) && + (pwr_status & TPS_POWER_STATUS_SOURCESINK)) { + val->intval = 1; + } else { + val->intval = 0; + } + return 0; +} + +static int tps6598x_psy_get_prop(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct tps6598x *tps = power_supply_get_drvdata(psy); + u16 pwr_status; + int ret = 0; + + switch (psp) { + case POWER_SUPPLY_PROP_USB_TYPE: + ret = tps6598x_read16(tps, TPS_REG_POWER_STATUS, &pwr_status); + if (ret < 0) + return ret; + if (TPS_POWER_STATUS_PWROPMODE(pwr_status) == TYPEC_PWR_MODE_PD) + val->intval = POWER_SUPPLY_USB_TYPE_PD; + else + val->intval = POWER_SUPPLY_USB_TYPE_C; + break; + case POWER_SUPPLY_PROP_ONLINE: + ret = tps6598x_psy_get_online(tps, val); + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static int devm_tps6598_psy_register(struct tps6598x *tps) +{ + struct power_supply_config psy_cfg = {}; + const char *port_dev_name = dev_name(tps->dev); + char *psy_name; + + psy_cfg.drv_data = tps; + psy_cfg.fwnode = dev_fwnode(tps->dev); + + psy_name = devm_kasprintf(tps->dev, GFP_KERNEL, "%s%s", tps6598x_psy_name_prefix, + port_dev_name); + if (!psy_name) + return -ENOMEM; + + tps->psy_desc.name = psy_name; + tps->psy_desc.type = POWER_SUPPLY_TYPE_USB; + tps->psy_desc.usb_types = tps6598x_psy_usb_types; + tps->psy_desc.num_usb_types = ARRAY_SIZE(tps6598x_psy_usb_types); + tps->psy_desc.properties = tps6598x_psy_props; + tps->psy_desc.num_properties = ARRAY_SIZE(tps6598x_psy_props); + tps->psy_desc.get_property = tps6598x_psy_get_prop; + + tps->usb_type = POWER_SUPPLY_USB_TYPE_C; + + tps->psy = devm_power_supply_register(tps->dev, &tps->psy_desc, + &psy_cfg); + return PTR_ERR_OR_ZERO(tps->psy); +} + static int tps6598x_probe(struct i2c_client *client) { struct typec_capability typec_cap = { }; @@ -560,6 +659,10 @@ static int tps6598x_probe(struct i2c_client *client) goto err_role_put; } + ret = devm_tps6598_psy_register(tps); + if (ret) + return ret; + tps->port = typec_register_port(&client->dev, &typec_cap); if (IS_ERR(tps->port)) { ret = PTR_ERR(tps->port); |