^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Charging control driver for the Wilco EC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright 2019 Google LLC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * See Documentation/ABI/testing/sysfs-class-power and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Documentation/ABI/testing/sysfs-class-power-wilco for userspace interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * and other info.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/platform_data/wilco-ec.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/power_supply.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define DRV_NAME "wilco-charger"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) /* Property IDs and related EC constants */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define PID_CHARGE_MODE 0x0710
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define PID_CHARGE_LOWER_LIMIT 0x0711
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define PID_CHARGE_UPPER_LIMIT 0x0712
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) enum charge_mode {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) CHARGE_MODE_STD = 1, /* Used for Standard */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) CHARGE_MODE_EXP = 2, /* Express Charge, used for Fast */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) CHARGE_MODE_AC = 3, /* Mostly AC use, used for Trickle */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) CHARGE_MODE_AUTO = 4, /* Used for Adaptive */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) CHARGE_MODE_CUSTOM = 5, /* Used for Custom */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) CHARGE_MODE_LONGLIFE = 6, /* Used for Long Life */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define CHARGE_LOWER_LIMIT_MIN 50
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define CHARGE_LOWER_LIMIT_MAX 95
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define CHARGE_UPPER_LIMIT_MIN 55
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define CHARGE_UPPER_LIMIT_MAX 100
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) /* Convert from POWER_SUPPLY_PROP_CHARGE_TYPE value to the EC's charge mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static int psp_val_to_charge_mode(int psp_val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) switch (psp_val) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) case POWER_SUPPLY_CHARGE_TYPE_TRICKLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) return CHARGE_MODE_AC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) case POWER_SUPPLY_CHARGE_TYPE_FAST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return CHARGE_MODE_EXP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) case POWER_SUPPLY_CHARGE_TYPE_STANDARD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) return CHARGE_MODE_STD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) case POWER_SUPPLY_CHARGE_TYPE_ADAPTIVE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) return CHARGE_MODE_AUTO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) case POWER_SUPPLY_CHARGE_TYPE_CUSTOM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) return CHARGE_MODE_CUSTOM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) case POWER_SUPPLY_CHARGE_TYPE_LONGLIFE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) return CHARGE_MODE_LONGLIFE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) /* Convert from EC's charge mode to POWER_SUPPLY_PROP_CHARGE_TYPE value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static int charge_mode_to_psp_val(enum charge_mode mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) switch (mode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) case CHARGE_MODE_AC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) return POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) case CHARGE_MODE_EXP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) return POWER_SUPPLY_CHARGE_TYPE_FAST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) case CHARGE_MODE_STD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) return POWER_SUPPLY_CHARGE_TYPE_STANDARD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) case CHARGE_MODE_AUTO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) return POWER_SUPPLY_CHARGE_TYPE_ADAPTIVE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) case CHARGE_MODE_CUSTOM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) return POWER_SUPPLY_CHARGE_TYPE_CUSTOM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) case CHARGE_MODE_LONGLIFE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) return POWER_SUPPLY_CHARGE_TYPE_LONGLIFE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) static enum power_supply_property wilco_charge_props[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) POWER_SUPPLY_PROP_CHARGE_TYPE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) POWER_SUPPLY_PROP_CHARGE_CONTROL_START_THRESHOLD,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) POWER_SUPPLY_PROP_CHARGE_CONTROL_END_THRESHOLD,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) static int wilco_charge_get_property(struct power_supply *psy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) enum power_supply_property psp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) union power_supply_propval *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) struct wilco_ec_device *ec = power_supply_get_drvdata(psy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) u32 property_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) u8 raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) switch (psp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) case POWER_SUPPLY_PROP_CHARGE_TYPE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) property_id = PID_CHARGE_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) case POWER_SUPPLY_PROP_CHARGE_CONTROL_START_THRESHOLD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) property_id = PID_CHARGE_LOWER_LIMIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) case POWER_SUPPLY_PROP_CHARGE_CONTROL_END_THRESHOLD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) property_id = PID_CHARGE_UPPER_LIMIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) ret = wilco_ec_get_byte_property(ec, property_id, &raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) if (property_id == PID_CHARGE_MODE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) ret = charge_mode_to_psp_val(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return -EBADMSG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) raw = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) val->intval = raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static int wilco_charge_set_property(struct power_supply *psy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) enum power_supply_property psp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) const union power_supply_propval *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) struct wilco_ec_device *ec = power_supply_get_drvdata(psy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) int mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) switch (psp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) case POWER_SUPPLY_PROP_CHARGE_TYPE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) mode = psp_val_to_charge_mode(val->intval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) if (mode < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) return wilco_ec_set_byte_property(ec, PID_CHARGE_MODE, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) case POWER_SUPPLY_PROP_CHARGE_CONTROL_START_THRESHOLD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) if (val->intval < CHARGE_LOWER_LIMIT_MIN ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) val->intval > CHARGE_LOWER_LIMIT_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) return wilco_ec_set_byte_property(ec, PID_CHARGE_LOWER_LIMIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) val->intval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) case POWER_SUPPLY_PROP_CHARGE_CONTROL_END_THRESHOLD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) if (val->intval < CHARGE_UPPER_LIMIT_MIN ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) val->intval > CHARGE_UPPER_LIMIT_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) return wilco_ec_set_byte_property(ec, PID_CHARGE_UPPER_LIMIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) val->intval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) static int wilco_charge_property_is_writeable(struct power_supply *psy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) enum power_supply_property psp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) static const struct power_supply_desc wilco_ps_desc = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) .properties = wilco_charge_props,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) .num_properties = ARRAY_SIZE(wilco_charge_props),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) .get_property = wilco_charge_get_property,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) .set_property = wilco_charge_set_property,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) .property_is_writeable = wilco_charge_property_is_writeable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) .name = DRV_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) .type = POWER_SUPPLY_TYPE_MAINS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) static int wilco_charge_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) struct wilco_ec_device *ec = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) struct power_supply_config psy_cfg = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) struct power_supply *psy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) psy_cfg.drv_data = ec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) psy = devm_power_supply_register(&pdev->dev, &wilco_ps_desc, &psy_cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) return PTR_ERR_OR_ZERO(psy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) static struct platform_driver wilco_charge_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) .probe = wilco_charge_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) .name = DRV_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) module_platform_driver(wilco_charge_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) MODULE_ALIAS("platform:" DRV_NAME);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) MODULE_AUTHOR("Nick Crews <ncrews@chromium.org>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) MODULE_LICENSE("GPL v2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) MODULE_DESCRIPTION("Wilco EC charge control driver");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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