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441d38c60f
Make use of the struct_size() helper instead of an open-coded version, in order to avoid any potential type mistakes or integer overflows that, in the worst scenario, could lead to heap overflows. Also, address the following sparse warnings: drivers/power/supply/cros_usbpd-charger.c:107:23: warning: using sizeof on a flexible structure Link: https://github.com/KSPP/linux/issues/174 Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
727 lines
20 KiB
C
727 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Power supply driver for ChromeOS EC based USB PD Charger.
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*
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* Copyright (c) 2014 - 2018 Google, Inc
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*/
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#include <linux/module.h>
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#include <linux/platform_data/cros_ec_commands.h>
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#include <linux/platform_data/cros_ec_proto.h>
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#include <linux/platform_data/cros_usbpd_notify.h>
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#include <linux/platform_device.h>
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#include <linux/power_supply.h>
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#include <linux/slab.h>
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#define CHARGER_USBPD_DIR_NAME "CROS_USBPD_CHARGER%d"
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#define CHARGER_DEDICATED_DIR_NAME "CROS_DEDICATED_CHARGER"
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#define CHARGER_DIR_NAME_LENGTH (sizeof(CHARGER_USBPD_DIR_NAME) >= \
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sizeof(CHARGER_DEDICATED_DIR_NAME) ? \
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sizeof(CHARGER_USBPD_DIR_NAME) : \
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sizeof(CHARGER_DEDICATED_DIR_NAME))
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#define CHARGER_CACHE_UPDATE_DELAY msecs_to_jiffies(500)
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#define CHARGER_MANUFACTURER_MODEL_LENGTH 32
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#define DRV_NAME "cros-usbpd-charger"
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struct port_data {
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int port_number;
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char name[CHARGER_DIR_NAME_LENGTH];
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char manufacturer[CHARGER_MANUFACTURER_MODEL_LENGTH];
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char model_name[CHARGER_MANUFACTURER_MODEL_LENGTH];
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struct power_supply *psy;
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struct power_supply_desc psy_desc;
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int psy_usb_type;
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int psy_online;
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int psy_status;
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int psy_current_max;
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int psy_voltage_max_design;
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int psy_voltage_now;
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int psy_power_max;
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struct charger_data *charger;
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unsigned long last_update;
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};
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struct charger_data {
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struct device *dev;
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struct cros_ec_dev *ec_dev;
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struct cros_ec_device *ec_device;
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int num_charger_ports;
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int num_usbpd_ports;
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int num_registered_psy;
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struct port_data *ports[EC_USB_PD_MAX_PORTS];
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struct notifier_block notifier;
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};
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static enum power_supply_property cros_usbpd_charger_props[] = {
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POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
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POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
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POWER_SUPPLY_PROP_ONLINE,
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POWER_SUPPLY_PROP_STATUS,
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POWER_SUPPLY_PROP_CURRENT_MAX,
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POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
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POWER_SUPPLY_PROP_VOLTAGE_NOW,
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POWER_SUPPLY_PROP_MODEL_NAME,
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POWER_SUPPLY_PROP_MANUFACTURER,
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POWER_SUPPLY_PROP_USB_TYPE
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};
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static enum power_supply_property cros_usbpd_dedicated_charger_props[] = {
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POWER_SUPPLY_PROP_ONLINE,
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POWER_SUPPLY_PROP_STATUS,
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POWER_SUPPLY_PROP_VOLTAGE_NOW,
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};
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static enum power_supply_usb_type cros_usbpd_charger_usb_types[] = {
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POWER_SUPPLY_USB_TYPE_UNKNOWN,
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POWER_SUPPLY_USB_TYPE_SDP,
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POWER_SUPPLY_USB_TYPE_DCP,
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POWER_SUPPLY_USB_TYPE_CDP,
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POWER_SUPPLY_USB_TYPE_C,
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POWER_SUPPLY_USB_TYPE_PD,
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POWER_SUPPLY_USB_TYPE_PD_DRP,
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POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID
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};
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/* Input voltage/current limit in mV/mA. Default to none. */
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static u16 input_voltage_limit = EC_POWER_LIMIT_NONE;
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static u16 input_current_limit = EC_POWER_LIMIT_NONE;
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static bool cros_usbpd_charger_port_is_dedicated(struct port_data *port)
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{
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return port->port_number >= port->charger->num_usbpd_ports;
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}
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static int cros_usbpd_charger_ec_command(struct charger_data *charger,
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unsigned int version,
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unsigned int command,
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void *outdata,
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unsigned int outsize,
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void *indata,
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unsigned int insize)
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{
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struct cros_ec_dev *ec_dev = charger->ec_dev;
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struct cros_ec_command *msg;
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int ret;
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msg = kzalloc(struct_size(msg, data, max(outsize, insize)), GFP_KERNEL);
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if (!msg)
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return -ENOMEM;
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msg->version = version;
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msg->command = ec_dev->cmd_offset + command;
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msg->outsize = outsize;
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msg->insize = insize;
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if (outsize)
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memcpy(msg->data, outdata, outsize);
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ret = cros_ec_cmd_xfer_status(charger->ec_device, msg);
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if (ret >= 0 && insize)
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memcpy(indata, msg->data, insize);
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kfree(msg);
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return ret;
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}
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static int cros_usbpd_charger_get_num_ports(struct charger_data *charger)
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{
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struct ec_response_charge_port_count resp;
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int ret;
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ret = cros_usbpd_charger_ec_command(charger, 0,
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EC_CMD_CHARGE_PORT_COUNT,
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NULL, 0, &resp, sizeof(resp));
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if (ret < 0)
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return ret;
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return resp.port_count;
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}
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static int cros_usbpd_charger_get_usbpd_num_ports(struct charger_data *charger)
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{
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struct ec_response_usb_pd_ports resp;
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int ret;
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ret = cros_usbpd_charger_ec_command(charger, 0, EC_CMD_USB_PD_PORTS,
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NULL, 0, &resp, sizeof(resp));
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if (ret < 0)
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return ret;
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return resp.num_ports;
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}
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static int cros_usbpd_charger_get_discovery_info(struct port_data *port)
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{
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struct charger_data *charger = port->charger;
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struct ec_params_usb_pd_discovery_entry resp;
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struct ec_params_usb_pd_info_request req;
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int ret;
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req.port = port->port_number;
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ret = cros_usbpd_charger_ec_command(charger, 0,
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EC_CMD_USB_PD_DISCOVERY,
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&req, sizeof(req),
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&resp, sizeof(resp));
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if (ret < 0) {
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dev_err(charger->dev,
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"Unable to query discovery info (err:0x%x)\n", ret);
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return ret;
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}
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dev_dbg(charger->dev, "Port %d: VID = 0x%x, PID=0x%x, PTYPE=0x%x\n",
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port->port_number, resp.vid, resp.pid, resp.ptype);
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snprintf(port->manufacturer, sizeof(port->manufacturer), "%x",
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resp.vid);
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snprintf(port->model_name, sizeof(port->model_name), "%x", resp.pid);
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return 0;
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}
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static int cros_usbpd_charger_get_power_info(struct port_data *port)
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{
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struct charger_data *charger = port->charger;
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struct ec_response_usb_pd_power_info resp;
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struct ec_params_usb_pd_power_info req;
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int last_psy_status, last_psy_usb_type;
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struct device *dev = charger->dev;
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int ret;
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req.port = port->port_number;
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ret = cros_usbpd_charger_ec_command(charger, 0,
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EC_CMD_USB_PD_POWER_INFO,
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&req, sizeof(req),
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&resp, sizeof(resp));
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if (ret < 0) {
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dev_err(dev, "Unable to query PD power info (err:0x%x)\n", ret);
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return ret;
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}
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last_psy_status = port->psy_status;
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last_psy_usb_type = port->psy_usb_type;
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switch (resp.role) {
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case USB_PD_PORT_POWER_DISCONNECTED:
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port->psy_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
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port->psy_online = 0;
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break;
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case USB_PD_PORT_POWER_SOURCE:
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port->psy_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
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port->psy_online = 0;
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break;
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case USB_PD_PORT_POWER_SINK:
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port->psy_status = POWER_SUPPLY_STATUS_CHARGING;
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port->psy_online = 1;
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break;
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case USB_PD_PORT_POWER_SINK_NOT_CHARGING:
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port->psy_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
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port->psy_online = 1;
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break;
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default:
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dev_err(dev, "Unknown role %d\n", resp.role);
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break;
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}
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port->psy_voltage_max_design = resp.meas.voltage_max;
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port->psy_voltage_now = resp.meas.voltage_now;
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port->psy_current_max = resp.meas.current_max;
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port->psy_power_max = resp.max_power;
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switch (resp.type) {
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case USB_CHG_TYPE_BC12_SDP:
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case USB_CHG_TYPE_VBUS:
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port->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
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break;
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case USB_CHG_TYPE_NONE:
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/*
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* For dual-role devices when we are a source, the firmware
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* reports the type as NONE. Report such chargers as type
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* USB_PD_DRP.
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*/
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if (resp.role == USB_PD_PORT_POWER_SOURCE && resp.dualrole)
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port->psy_usb_type = POWER_SUPPLY_USB_TYPE_PD_DRP;
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else
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port->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
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break;
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case USB_CHG_TYPE_OTHER:
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case USB_CHG_TYPE_PROPRIETARY:
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port->psy_usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID;
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break;
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case USB_CHG_TYPE_C:
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port->psy_usb_type = POWER_SUPPLY_USB_TYPE_C;
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break;
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case USB_CHG_TYPE_BC12_DCP:
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port->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
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break;
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case USB_CHG_TYPE_BC12_CDP:
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port->psy_usb_type = POWER_SUPPLY_USB_TYPE_CDP;
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break;
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case USB_CHG_TYPE_PD:
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if (resp.dualrole)
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port->psy_usb_type = POWER_SUPPLY_USB_TYPE_PD_DRP;
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else
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port->psy_usb_type = POWER_SUPPLY_USB_TYPE_PD;
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break;
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case USB_CHG_TYPE_UNKNOWN:
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/*
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* While the EC is trying to determine the type of charger that
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* has been plugged in, it will report the charger type as
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* unknown. Additionally since the power capabilities are
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* unknown, report the max current and voltage as zero.
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*/
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port->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
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port->psy_voltage_max_design = 0;
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port->psy_current_max = 0;
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break;
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default:
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dev_err(dev, "Port %d: default case!\n", port->port_number);
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port->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
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}
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if (cros_usbpd_charger_port_is_dedicated(port))
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port->psy_desc.type = POWER_SUPPLY_TYPE_MAINS;
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else
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port->psy_desc.type = POWER_SUPPLY_TYPE_USB;
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dev_dbg(dev,
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"Port %d: type=%d vmax=%d vnow=%d cmax=%d clim=%d pmax=%d\n",
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port->port_number, resp.type, resp.meas.voltage_max,
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resp.meas.voltage_now, resp.meas.current_max,
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resp.meas.current_lim, resp.max_power);
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/*
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* If power supply type or status changed, explicitly call
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* power_supply_changed. This results in udev event getting generated
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* and allows user mode apps to react quicker instead of waiting for
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* their next poll of power supply status.
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*/
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if (last_psy_usb_type != port->psy_usb_type ||
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last_psy_status != port->psy_status)
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power_supply_changed(port->psy);
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return 0;
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}
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static int cros_usbpd_charger_get_port_status(struct port_data *port,
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bool ratelimit)
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{
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int ret;
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if (ratelimit &&
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time_is_after_jiffies(port->last_update +
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CHARGER_CACHE_UPDATE_DELAY))
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return 0;
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ret = cros_usbpd_charger_get_power_info(port);
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if (ret < 0)
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return ret;
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if (!cros_usbpd_charger_port_is_dedicated(port))
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ret = cros_usbpd_charger_get_discovery_info(port);
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port->last_update = jiffies;
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return ret;
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}
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static int cros_usbpd_charger_set_ext_power_limit(struct charger_data *charger,
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u16 current_lim,
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u16 voltage_lim)
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{
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struct ec_params_external_power_limit_v1 req;
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int ret;
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req.current_lim = current_lim;
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req.voltage_lim = voltage_lim;
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ret = cros_usbpd_charger_ec_command(charger, 0,
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EC_CMD_EXTERNAL_POWER_LIMIT,
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&req, sizeof(req), NULL, 0);
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if (ret < 0)
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dev_err(charger->dev,
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"Unable to set the 'External Power Limit': %d\n", ret);
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return ret;
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}
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static void cros_usbpd_charger_power_changed(struct power_supply *psy)
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{
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struct port_data *port = power_supply_get_drvdata(psy);
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struct charger_data *charger = port->charger;
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int i;
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for (i = 0; i < charger->num_registered_psy; i++)
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cros_usbpd_charger_get_port_status(charger->ports[i], false);
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}
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static int cros_usbpd_charger_get_prop(struct power_supply *psy,
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enum power_supply_property psp,
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union power_supply_propval *val)
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{
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struct port_data *port = power_supply_get_drvdata(psy);
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struct charger_data *charger = port->charger;
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struct cros_ec_device *ec_device = charger->ec_device;
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struct device *dev = charger->dev;
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int ret;
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/* Only refresh ec_port_status for dynamic properties */
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switch (psp) {
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case POWER_SUPPLY_PROP_ONLINE:
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/*
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* If mkbp_event_supported, then we can be assured that
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* the driver's state for the online property is consistent
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* with the hardware. However, if we aren't event driven,
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* the optimization before to skip an ec_port_status get
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* and only returned cached values of the online property will
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* cause a delay in detecting a cable attach until one of the
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* other properties are read.
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*
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* Allow an ec_port_status refresh for online property check
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* if we're not already online to check for plug events if
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* not mkbp_event_supported.
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*/
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if (ec_device->mkbp_event_supported || port->psy_online)
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break;
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fallthrough;
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case POWER_SUPPLY_PROP_CURRENT_MAX:
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case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
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case POWER_SUPPLY_PROP_VOLTAGE_NOW:
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ret = cros_usbpd_charger_get_port_status(port, true);
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if (ret < 0) {
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dev_err(dev, "Failed to get port status (err:0x%x)\n",
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ret);
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return -EINVAL;
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}
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break;
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default:
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break;
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}
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switch (psp) {
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case POWER_SUPPLY_PROP_ONLINE:
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val->intval = port->psy_online;
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break;
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case POWER_SUPPLY_PROP_STATUS:
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val->intval = port->psy_status;
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break;
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case POWER_SUPPLY_PROP_CURRENT_MAX:
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val->intval = port->psy_current_max * 1000;
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
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val->intval = port->psy_voltage_max_design * 1000;
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_NOW:
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val->intval = port->psy_voltage_now * 1000;
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break;
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case POWER_SUPPLY_PROP_USB_TYPE:
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val->intval = port->psy_usb_type;
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break;
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case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
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if (input_current_limit == EC_POWER_LIMIT_NONE)
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val->intval = -1;
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else
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val->intval = input_current_limit * 1000;
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break;
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case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
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if (input_voltage_limit == EC_POWER_LIMIT_NONE)
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val->intval = -1;
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else
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val->intval = input_voltage_limit * 1000;
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break;
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case POWER_SUPPLY_PROP_MODEL_NAME:
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val->strval = port->model_name;
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break;
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case POWER_SUPPLY_PROP_MANUFACTURER:
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val->strval = port->manufacturer;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int cros_usbpd_charger_set_prop(struct power_supply *psy,
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enum power_supply_property psp,
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const union power_supply_propval *val)
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{
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struct port_data *port = power_supply_get_drvdata(psy);
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struct charger_data *charger = port->charger;
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struct device *dev = charger->dev;
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u16 intval;
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int ret;
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/* U16_MAX in mV/mA is the maximum supported value */
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if (val->intval >= U16_MAX * 1000)
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return -EINVAL;
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/* A negative number is used to clear the limit */
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if (val->intval < 0)
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intval = EC_POWER_LIMIT_NONE;
|
|
else /* Convert from uA/uV to mA/mV */
|
|
intval = val->intval / 1000;
|
|
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
|
|
ret = cros_usbpd_charger_set_ext_power_limit(charger, intval,
|
|
input_voltage_limit);
|
|
if (ret < 0)
|
|
break;
|
|
|
|
input_current_limit = intval;
|
|
if (input_current_limit == EC_POWER_LIMIT_NONE)
|
|
dev_info(dev,
|
|
"External Current Limit cleared for all ports\n");
|
|
else
|
|
dev_info(dev,
|
|
"External Current Limit set to %dmA for all ports\n",
|
|
input_current_limit);
|
|
break;
|
|
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
|
|
ret = cros_usbpd_charger_set_ext_power_limit(charger,
|
|
input_current_limit,
|
|
intval);
|
|
if (ret < 0)
|
|
break;
|
|
|
|
input_voltage_limit = intval;
|
|
if (input_voltage_limit == EC_POWER_LIMIT_NONE)
|
|
dev_info(dev,
|
|
"External Voltage Limit cleared for all ports\n");
|
|
else
|
|
dev_info(dev,
|
|
"External Voltage Limit set to %dmV for all ports\n",
|
|
input_voltage_limit);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int cros_usbpd_charger_property_is_writeable(struct power_supply *psy,
|
|
enum power_supply_property psp)
|
|
{
|
|
int ret;
|
|
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
|
|
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
|
|
ret = 1;
|
|
break;
|
|
default:
|
|
ret = 0;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int cros_usbpd_charger_ec_event(struct notifier_block *nb,
|
|
unsigned long host_event,
|
|
void *_notify)
|
|
{
|
|
struct charger_data *charger = container_of(nb, struct charger_data,
|
|
notifier);
|
|
|
|
cros_usbpd_charger_power_changed(charger->ports[0]->psy);
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
static void cros_usbpd_charger_unregister_notifier(void *data)
|
|
{
|
|
struct charger_data *charger = data;
|
|
|
|
cros_usbpd_unregister_notify(&charger->notifier);
|
|
}
|
|
|
|
static int cros_usbpd_charger_probe(struct platform_device *pd)
|
|
{
|
|
struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent);
|
|
struct cros_ec_device *ec_device = ec_dev->ec_dev;
|
|
struct power_supply_desc *psy_desc;
|
|
struct device *dev = &pd->dev;
|
|
struct charger_data *charger;
|
|
struct power_supply *psy;
|
|
struct port_data *port;
|
|
int ret = -EINVAL;
|
|
int i;
|
|
|
|
charger = devm_kzalloc(dev, sizeof(struct charger_data),
|
|
GFP_KERNEL);
|
|
if (!charger)
|
|
return -ENOMEM;
|
|
|
|
charger->dev = dev;
|
|
charger->ec_dev = ec_dev;
|
|
charger->ec_device = ec_device;
|
|
|
|
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) {
|
|
/*
|
|
* 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 = {};
|
|
|
|
port = devm_kzalloc(dev, sizeof(struct port_data), GFP_KERNEL);
|
|
if (!port) {
|
|
ret = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
port->charger = charger;
|
|
port->port_number = i;
|
|
|
|
psy_desc = &port->psy_desc;
|
|
psy_desc->get_property = cros_usbpd_charger_get_prop;
|
|
psy_desc->set_property = cros_usbpd_charger_set_prop;
|
|
psy_desc->property_is_writeable =
|
|
cros_usbpd_charger_property_is_writeable;
|
|
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_desc->name = port->name;
|
|
|
|
psy = devm_power_supply_register_no_ws(dev, psy_desc,
|
|
&psy_cfg);
|
|
if (IS_ERR(psy)) {
|
|
dev_err(dev, "Failed to register power supply\n");
|
|
continue;
|
|
}
|
|
port->psy = psy;
|
|
|
|
charger->ports[charger->num_registered_psy++] = port;
|
|
}
|
|
|
|
if (!charger->num_registered_psy) {
|
|
ret = -ENODEV;
|
|
dev_err(dev, "No power supplies registered\n");
|
|
goto fail;
|
|
}
|
|
|
|
/* Get PD events from the EC */
|
|
charger->notifier.notifier_call = cros_usbpd_charger_ec_event;
|
|
ret = cros_usbpd_register_notify(&charger->notifier);
|
|
if (ret < 0) {
|
|
dev_warn(dev, "failed to register notifier\n");
|
|
} else {
|
|
ret = devm_add_action_or_reset(dev,
|
|
cros_usbpd_charger_unregister_notifier,
|
|
charger);
|
|
if (ret < 0)
|
|
goto fail;
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
WARN(1, "%s: Failing probe (err:0x%x)\n", dev_name(dev), ret);
|
|
|
|
fail_nowarn:
|
|
dev_info(dev, "Failing probe (err:0x%x)\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int cros_usbpd_charger_resume(struct device *dev)
|
|
{
|
|
struct charger_data *charger = dev_get_drvdata(dev);
|
|
int i;
|
|
|
|
if (!charger)
|
|
return 0;
|
|
|
|
for (i = 0; i < charger->num_registered_psy; i++) {
|
|
power_supply_changed(charger->ports[i]->psy);
|
|
charger->ports[i]->last_update =
|
|
jiffies - CHARGER_CACHE_UPDATE_DELAY;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static SIMPLE_DEV_PM_OPS(cros_usbpd_charger_pm_ops, NULL,
|
|
cros_usbpd_charger_resume);
|
|
|
|
static struct platform_driver cros_usbpd_charger_driver = {
|
|
.driver = {
|
|
.name = DRV_NAME,
|
|
.pm = &cros_usbpd_charger_pm_ops,
|
|
},
|
|
.probe = cros_usbpd_charger_probe
|
|
};
|
|
|
|
module_platform_driver(cros_usbpd_charger_driver);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("ChromeOS EC USBPD charger");
|
|
MODULE_ALIAS("platform:" DRV_NAME);
|