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path: root/drivers/power/supply/cros_usbpd-charger.c
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Diffstat (limited to 'drivers/power/supply/cros_usbpd-charger.c')
-rw-r--r--drivers/power/supply/cros_usbpd-charger.c117
1 files changed, 101 insertions, 16 deletions
diff --git a/drivers/power/supply/cros_usbpd-charger.c b/drivers/power/supply/cros_usbpd-charger.c
index 688a16bacfbb..7e9c3984ef6a 100644
--- a/drivers/power/supply/cros_usbpd-charger.c
+++ b/drivers/power/supply/cros_usbpd-charger.c
@@ -12,8 +12,12 @@
#include <linux/power_supply.h>
#include <linux/slab.h>
-#define CHARGER_DIR_NAME "CROS_USBPD_CHARGER%d"
-#define CHARGER_DIR_NAME_LENGTH sizeof(CHARGER_DIR_NAME)
+#define CHARGER_USBPD_DIR_NAME "CROS_USBPD_CHARGER%d"
+#define CHARGER_DEDICATED_DIR_NAME "CROS_DEDICATED_CHARGER"
+#define CHARGER_DIR_NAME_LENGTH (sizeof(CHARGER_USBPD_DIR_NAME) >= \
+ sizeof(CHARGER_DEDICATED_DIR_NAME) ? \
+ sizeof(CHARGER_USBPD_DIR_NAME) : \
+ sizeof(CHARGER_DEDICATED_DIR_NAME))
#define CHARGER_CACHE_UPDATE_DELAY msecs_to_jiffies(500)
#define CHARGER_MANUFACTURER_MODEL_LENGTH 32
@@ -42,6 +46,7 @@ struct charger_data {
struct cros_ec_dev *ec_dev;
struct cros_ec_device *ec_device;
int num_charger_ports;
+ int num_usbpd_ports;
int num_registered_psy;
struct port_data *ports[EC_USB_PD_MAX_PORTS];
struct notifier_block notifier;
@@ -58,6 +63,12 @@ static enum power_supply_property cros_usbpd_charger_props[] = {
POWER_SUPPLY_PROP_USB_TYPE
};
+static enum power_supply_property cros_usbpd_dedicated_charger_props[] = {
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+};
+
static enum power_supply_usb_type cros_usbpd_charger_usb_types[] = {
POWER_SUPPLY_USB_TYPE_UNKNOWN,
POWER_SUPPLY_USB_TYPE_SDP,
@@ -69,6 +80,11 @@ static enum power_supply_usb_type cros_usbpd_charger_usb_types[] = {
POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID
};
+static bool cros_usbpd_charger_port_is_dedicated(struct port_data *port)
+{
+ return port->port_number >= port->charger->num_usbpd_ports;
+}
+
static int cros_usbpd_charger_ec_command(struct charger_data *charger,
unsigned int version,
unsigned int command,
@@ -103,6 +119,23 @@ static int cros_usbpd_charger_ec_command(struct charger_data *charger,
static int cros_usbpd_charger_get_num_ports(struct charger_data *charger)
{
+ struct ec_response_charge_port_count resp;
+ int ret;
+
+ ret = cros_usbpd_charger_ec_command(charger, 0,
+ EC_CMD_CHARGE_PORT_COUNT,
+ NULL, 0, &resp, sizeof(resp));
+ if (ret < 0) {
+ dev_err(charger->dev,
+ "Unable to get the number of ports (err:0x%x)\n", ret);
+ return ret;
+ }
+
+ return resp.port_count;
+}
+
+static int cros_usbpd_charger_get_usbpd_num_ports(struct charger_data *charger)
+{
struct ec_response_usb_pd_ports resp;
int ret;
@@ -246,7 +279,10 @@ static int cros_usbpd_charger_get_power_info(struct port_data *port)
port->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
}
- port->psy_desc.type = POWER_SUPPLY_TYPE_USB;
+ if (cros_usbpd_charger_port_is_dedicated(port))
+ port->psy_desc.type = POWER_SUPPLY_TYPE_MAINS;
+ else
+ port->psy_desc.type = POWER_SUPPLY_TYPE_USB;
dev_dbg(dev,
"Port %d: type=%d vmax=%d vnow=%d cmax=%d clim=%d pmax=%d\n",
@@ -281,7 +317,8 @@ static int cros_usbpd_charger_get_port_status(struct port_data *port,
if (ret < 0)
return ret;
- ret = cros_usbpd_charger_get_discovery_info(port);
+ if (!cros_usbpd_charger_port_is_dedicated(port))
+ ret = cros_usbpd_charger_get_discovery_info(port);
port->last_update = jiffies;
return ret;
@@ -378,12 +415,10 @@ static int cros_usbpd_charger_ec_event(struct notifier_block *nb,
{
struct cros_ec_device *ec_device;
struct charger_data *charger;
- struct device *dev;
u32 host_event;
charger = container_of(nb, struct charger_data, notifier);
ec_device = charger->ec_device;
- dev = charger->dev;
host_event = cros_ec_get_host_event(ec_device);
if (host_event & EC_HOST_EVENT_MASK(EC_HOST_EVENT_PD_MCU)) {
@@ -426,17 +461,56 @@ static int cros_usbpd_charger_probe(struct platform_device *pd)
platform_set_drvdata(pd, charger);
+ /*
+ * We need to know the number of USB PD ports in order to know whether
+ * there is a dedicated port. The dedicated port will always be
+ * after the USB PD ports, and there should be only one.
+ */
+ charger->num_usbpd_ports =
+ cros_usbpd_charger_get_usbpd_num_ports(charger);
+ if (charger->num_usbpd_ports <= 0) {
+ /*
+ * This can happen on a system that doesn't support USB PD.
+ * Log a message, but no need to warn.
+ */
+ dev_info(dev, "No USB PD charging ports found\n");
+ }
+
charger->num_charger_ports = cros_usbpd_charger_get_num_ports(charger);
- if (charger->num_charger_ports <= 0) {
+ if (charger->num_charger_ports < 0) {
/*
* This can happen on a system that doesn't support USB PD.
* Log a message, but no need to warn.
+ * Older ECs do not support the above command, in that case
+ * let's set up the number of charger ports equal to the number
+ * of USB PD ports
+ */
+ dev_info(dev, "Could not get charger port count\n");
+ charger->num_charger_ports = charger->num_usbpd_ports;
+ }
+
+ if (charger->num_charger_ports <= 0) {
+ /*
+ * This can happen on a system that doesn't support USB PD and
+ * doesn't have a dedicated port.
+ * Log a message, but no need to warn.
*/
dev_info(dev, "No charging ports found\n");
ret = -ENODEV;
goto fail_nowarn;
}
+ /*
+ * Sanity checks on the number of ports:
+ * there should be at most 1 dedicated port
+ */
+ if (charger->num_charger_ports < charger->num_usbpd_ports ||
+ charger->num_charger_ports > (charger->num_usbpd_ports + 1)) {
+ dev_err(dev, "Unexpected number of charge port count\n");
+ ret = -EPROTO;
+ goto fail_nowarn;
+ }
+
for (i = 0; i < charger->num_charger_ports; i++) {
struct power_supply_config psy_cfg = {};
@@ -448,22 +522,33 @@ static int cros_usbpd_charger_probe(struct platform_device *pd)
port->charger = charger;
port->port_number = i;
- sprintf(port->name, CHARGER_DIR_NAME, i);
psy_desc = &port->psy_desc;
- psy_desc->name = port->name;
- psy_desc->type = POWER_SUPPLY_TYPE_USB;
psy_desc->get_property = cros_usbpd_charger_get_prop;
psy_desc->external_power_changed =
cros_usbpd_charger_power_changed;
- psy_desc->properties = cros_usbpd_charger_props;
- psy_desc->num_properties =
- ARRAY_SIZE(cros_usbpd_charger_props);
- psy_desc->usb_types = cros_usbpd_charger_usb_types;
- psy_desc->num_usb_types =
- ARRAY_SIZE(cros_usbpd_charger_usb_types);
psy_cfg.drv_data = port;
+ if (cros_usbpd_charger_port_is_dedicated(port)) {
+ sprintf(port->name, CHARGER_DEDICATED_DIR_NAME);
+ psy_desc->type = POWER_SUPPLY_TYPE_MAINS;
+ psy_desc->properties =
+ cros_usbpd_dedicated_charger_props;
+ psy_desc->num_properties =
+ ARRAY_SIZE(cros_usbpd_dedicated_charger_props);
+ } else {
+ sprintf(port->name, CHARGER_USBPD_DIR_NAME, i);
+ psy_desc->type = POWER_SUPPLY_TYPE_USB;
+ psy_desc->properties = cros_usbpd_charger_props;
+ psy_desc->num_properties =
+ ARRAY_SIZE(cros_usbpd_charger_props);
+ psy_desc->usb_types = cros_usbpd_charger_usb_types;
+ psy_desc->num_usb_types =
+ ARRAY_SIZE(cros_usbpd_charger_usb_types);
+ }
+
+ psy_desc->name = port->name;
+
psy = devm_power_supply_register_no_ws(dev, psy_desc,
&psy_cfg);
if (IS_ERR(psy)) {
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-23 18:08:04 +0300