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Immutable branch for mfd and power-supply for v4.20

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Immutable branch between mfd and power-supply for driver
 changes in CROS USBPD charger driver.
 
 Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
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Merge tag 'psy-mfd-cros-immutable-for-v4.20-signed' into psy-next

Immutable branch for mfd and power-supply for v4.20

Immutable branch between mfd and power-supply for driver
changes in CROS USBPD charger driver.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Sebastian Reichel 2018-09-16 13:10:37 +02:00
commit 782853cf9b
2 changed files with 112 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

103
drivers/power/supply/cros_usbpd-charger.c
View File

@ -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,
@ -102,6 +118,23 @@ 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;
@ -246,6 +279,9 @@ static int cros_usbpd_charger_get_power_info(struct port_data *port)
port->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
}
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,
@ -281,6 +317,7 @@ static int cros_usbpd_charger_get_port_status(struct port_data *port,
if (ret < 0)
return ret;
if (!cros_usbpd_charger_port_is_dedicated(port))
ret = cros_usbpd_charger_get_discovery_info(port);
port->last_update = jiffies;
@ -424,17 +461,56 @@ static int cros_usbpd_charger_probe(struct platform_device *pd)
platform_set_drvdata(pd, charger);
charger->num_charger_ports = cros_usbpd_charger_get_num_ports(charger);
if (charger->num_charger_ports <= 0) {
/*
* 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) {
/*
* 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 = {};
@ -446,21 +522,32 @@ 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_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_cfg.drv_data = port;
}
psy_desc->name = port->name;
psy = devm_power_supply_register_no_ws(dev, psy_desc,
&psy_cfg);

10
include/linux/mfd/cros_ec_commands.h
View File

@ -3102,6 +3102,16 @@ struct ec_params_usb_pd_info_request {
uint8_t port;
} __packed;
/*
* This command will return the number of USB PD charge port + the number
* of dedicated port present.
* EC_CMD_USB_PD_PORTS does NOT include the dedicated ports
*/
#define EC_CMD_CHARGE_PORT_COUNT 0x0105
struct ec_response_charge_port_count {
uint8_t port_count;
} __packed;
/* Read USB-PD Device discovery info */
#define EC_CMD_USB_PD_DISCOVERY 0x0113
struct ec_params_usb_pd_discovery_entry {