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38525c6919
power-supply core: * Add wireless type * Properly document current direction battery/charger driver changes: * New fuel-gauge/charger driver for RN5T618/RN5T619 * New charger driver for BQ25980, BQ25975 and BQ25960 * bq27xxx-battery: add support for TI bq34z100 * gpio-charger: convert to GPIO descriptors * gpio-charger: add optional support for charge current limiting * max17040: add support for max17041, max17043, max17044 * max17040: add support for max17048, max17049, max17058, max17059 * smb347-charger: add DT support * smb247-charger: add SMB345 and SMB358 support * simple-battery: add temperature properties * lots of minor fixes, cleanups and DT binding YAML conversions reset drivers: * ocelot: Add support for Sparx5 -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEE72YNB0Y/i3JqeVQT2O7X88g7+poFAl+IsXoACgkQ2O7X88g7 +prL8RAAprDcwF5irflM2bWwzKnfuNgTjk6P/o9gIWiSJsNA1R3XKJEm6l38givV EhnceGaZXgWg8blh3htd5Z6DNEEFX5ucB9KtQESW5ehM/KGvcEwD7CJilSJejqt4 3AQiFQLa41s4tnBBao/9gp+juSsvwg2NoeCaOa1H2K5oVi7WDmnmQyexa6CAty7b D4Uz8EOfpVi9FvYalffGP7QkA5ZsNWSLRRLJshHCw6QH54+h51F5efhu5S5qxXEA L/yjfFFhiB99df7y4LzvCItfaTGLcLNFfCas4+0yOWnViXosIr9rQk51FihXaDot DBCyF6hHWFDCnymnjMjWclYeatPFw+jnPrjmn+b0mQ/RaTgz30tgvuZurepcCwN/ ZKZftnvN16VAnUYgrE397F706sBZHjE6NonWvpXExawNUznA4h2uTu1bwWhtp5Um gcIjhL0ePEMf1yAYW3iI/l70NfIgPoEep6w+8oyLgV4vvffkKxkHkndoV7ZcS79M OdKbgGq4ZBNTS8ABsjHDO0o+/vBuKa3KE3/2J+916G3mc8FM6WJBfo1mIuwD51GA ASwG4UlE1Kyu91z4rP15GGMwSho7UKvWORB5ECsmfZ8xjiJSRHJAiDhmiaSaZZi0 dc5JKVDdM056IWOuP8THEVG6r3BiG/B1i8eY4YJ6GPv82JP/iks= =QtfI -----END PGP SIGNATURE----- Merge tag 'for-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply Pull power supply and reset updates from Sebastian Reichel: "Power-supply core: - add wireless type - properly document current direction Battery/charger driver changes: - new fuel-gauge/charger driver for RN5T618/RN5T619 - new charger driver for BQ25980, BQ25975 and BQ25960 - bq27xxx-battery: add support for TI bq34z100 - gpio-charger: convert to GPIO descriptors - gpio-charger: add optional support for charge current limiting - max17040: add support for max17041, max17043, max17044 - max17040: add support for max17048, max17049, max17058, max17059 - smb347-charger: add DT support - smb247-charger: add SMB345 and SMB358 support - simple-battery: add temperature properties - lots of minor fixes, cleanups and DT binding YAML conversions Reset drivers: - ocelot: Add support for Sparx5" * tag 'for-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: (81 commits) power: reset: POWER_RESET_OCELOT_RESET should depend on Ocelot or Sparx5 power: supply: bq25980: Fix uninitialized wd_reg_val and overrun power: supply: ltc2941: Fix ptr to enum cast power: supply: test-power: revise parameter printing to use sprintf power: supply: charger-manager: fix incorrect check on charging_duration_ms power: supply: max17040: Fix ptr to enum cast power: supply: bq25980: Fix uninitialized wd_reg_val power: supply: bq25980: remove redundant zero check on ret power: reset: ocelot: Add support for Sparx5 dt-bindings: reset: ocelot: Add Sparx5 support power: supply: sbs-battery: keep error code when get_property() fails power: supply: bq25980: Add support for the BQ259xx family dt-binding: bq25980: Add the bq25980 flash charger power: supply: fix spelling mistake "unprecise" -> "imprecise" power: supply: test_power: add missing newlines when printing parameters by sysfs power: supply: pm2301: drop duplicated i2c_device_id power: supply: charger-manager: drop unused charger assignment power: supply: rt9455: skip 'struct acpi_device_id' when !CONFIG_ACPI power: supply: goldfish: skip 'struct acpi_device_id' when !CONFIG_ACPI power: supply: bq25890: skip 'struct acpi_device_id' when !CONFIG_ACPI ...
129 lines
2.8 KiB
C
129 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* BQ27xxx battery monitor HDQ/1-wire driver
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*
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* Copyright (C) 2007-2017 Texas Instruments Incorporated - https://www.ti.com/
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/types.h>
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#include <linux/platform_device.h>
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#include <linux/mutex.h>
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#include <linux/power/bq27xxx_battery.h>
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#include <linux/w1.h>
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#define W1_FAMILY_BQ27000 0x01
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#define HDQ_CMD_READ (0 << 7)
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#define HDQ_CMD_WRITE (1 << 7)
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static int F_ID;
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module_param(F_ID, int, S_IRUSR);
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MODULE_PARM_DESC(F_ID, "1-wire slave FID for BQ27xxx device");
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static int w1_bq27000_read(struct w1_slave *sl, unsigned int reg)
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{
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u8 val;
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mutex_lock(&sl->master->bus_mutex);
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w1_write_8(sl->master, HDQ_CMD_READ | reg);
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val = w1_read_8(sl->master);
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mutex_unlock(&sl->master->bus_mutex);
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return val;
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}
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static int bq27xxx_battery_hdq_read(struct bq27xxx_device_info *di, u8 reg,
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bool single)
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{
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struct w1_slave *sl = dev_to_w1_slave(di->dev);
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unsigned int timeout = 3;
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int upper, lower;
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int temp;
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if (!single) {
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/*
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* Make sure the value has not changed in between reading the
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* lower and the upper part
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*/
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upper = w1_bq27000_read(sl, reg + 1);
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do {
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temp = upper;
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if (upper < 0)
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return upper;
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lower = w1_bq27000_read(sl, reg);
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if (lower < 0)
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return lower;
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upper = w1_bq27000_read(sl, reg + 1);
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} while (temp != upper && --timeout);
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if (timeout == 0)
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return -EIO;
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return (upper << 8) | lower;
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}
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return w1_bq27000_read(sl, reg);
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}
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static int bq27xxx_battery_hdq_add_slave(struct w1_slave *sl)
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{
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struct bq27xxx_device_info *di;
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di = devm_kzalloc(&sl->dev, sizeof(*di), GFP_KERNEL);
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if (!di)
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return -ENOMEM;
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dev_set_drvdata(&sl->dev, di);
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di->dev = &sl->dev;
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di->chip = BQ27000;
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di->name = "bq27000-battery";
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di->bus.read = bq27xxx_battery_hdq_read;
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return bq27xxx_battery_setup(di);
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}
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static void bq27xxx_battery_hdq_remove_slave(struct w1_slave *sl)
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{
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struct bq27xxx_device_info *di = dev_get_drvdata(&sl->dev);
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bq27xxx_battery_teardown(di);
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}
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static const struct w1_family_ops bq27xxx_battery_hdq_fops = {
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.add_slave = bq27xxx_battery_hdq_add_slave,
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.remove_slave = bq27xxx_battery_hdq_remove_slave,
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};
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static struct w1_family bq27xxx_battery_hdq_family = {
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.fid = W1_FAMILY_BQ27000,
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.fops = &bq27xxx_battery_hdq_fops,
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};
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static int __init bq27xxx_battery_hdq_init(void)
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{
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if (F_ID)
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bq27xxx_battery_hdq_family.fid = F_ID;
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return w1_register_family(&bq27xxx_battery_hdq_family);
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}
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module_init(bq27xxx_battery_hdq_init);
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static void __exit bq27xxx_battery_hdq_exit(void)
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{
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w1_unregister_family(&bq27xxx_battery_hdq_family);
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}
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module_exit(bq27xxx_battery_hdq_exit);
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MODULE_AUTHOR("Texas Instruments Ltd");
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MODULE_DESCRIPTION("BQ27xxx battery monitor HDQ/1-wire driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("w1-family-" __stringify(W1_FAMILY_BQ27000));
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