power: supply: add CellWise cw2015 fuel gauge driver
This patch adds a driver for the CellWise cw2015 fuel gauge. The CellWise cw2015 is a shuntless, single-cell Li-Ion fuel gauge used in the pine64 Pinebook Pro laptop and some Raspberry Pi UPS HATs. Signed-off-by: Tobias Schramm <t.schramm@manjaro.org> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Tobias Schramm
Sebastian Reichel
parent
6e77618863
commit
b4c7715c10
@ -3932,6 +3932,12 @@ F: arch/powerpc/include/uapi/asm/spu*.h
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F: arch/powerpc/oprofile/*cell*
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F: arch/powerpc/oprofile/*cell*
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F: arch/powerpc/platforms/cell/
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F: arch/powerpc/platforms/cell/
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CELLWISE CW2015 BATTERY DRIVER
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M: Tobias Schrammm <t.schramm@manjaro.org>
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S: Maintained
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F: Documentation/devicetree/bindings/power/supply/cw2015_battery.yaml
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F: drivers/power/supply/cw2015_battery.c
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CEPH COMMON CODE (LIBCEPH)
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CEPH COMMON CODE (LIBCEPH)
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M: Ilya Dryomov <idryomov@gmail.com>
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M: Ilya Dryomov <idryomov@gmail.com>
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M: Jeff Layton <jlayton@kernel.org>
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M: Jeff Layton <jlayton@kernel.org>
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@ -116,6 +116,17 @@ config BATTERY_CPCAP
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Say Y here to enable support for battery on Motorola
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Say Y here to enable support for battery on Motorola
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phones and tablets such as droid 4.
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phones and tablets such as droid 4.
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config BATTERY_CW2015
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tristate "CW2015 Battery driver"
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depends on I2C
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select REGMAP_I2C
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help
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Say Y here to enable support for the cellwise cw2015
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battery fuel gauge (used in the Pinebook Pro & others)
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This driver can also be built as a module. If so, the module will be
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called cw2015_battery.
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config BATTERY_DS2760
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config BATTERY_DS2760
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tristate "DS2760 battery driver (HP iPAQ & others)"
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tristate "DS2760 battery driver (HP iPAQ & others)"
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depends on W1
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depends on W1
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@ -24,6 +24,7 @@ obj-$(CONFIG_BATTERY_ACT8945A) += act8945a_charger.o
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obj-$(CONFIG_BATTERY_AXP20X) += axp20x_battery.o
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obj-$(CONFIG_BATTERY_AXP20X) += axp20x_battery.o
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obj-$(CONFIG_CHARGER_AXP20X) += axp20x_ac_power.o
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obj-$(CONFIG_CHARGER_AXP20X) += axp20x_ac_power.o
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obj-$(CONFIG_BATTERY_CPCAP) += cpcap-battery.o
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obj-$(CONFIG_BATTERY_CPCAP) += cpcap-battery.o
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obj-$(CONFIG_BATTERY_CW2015) += cw2015_battery.o
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obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o
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obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o
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obj-$(CONFIG_BATTERY_DS2780) += ds2780_battery.o
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obj-$(CONFIG_BATTERY_DS2780) += ds2780_battery.o
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obj-$(CONFIG_BATTERY_DS2781) += ds2781_battery.o
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obj-$(CONFIG_BATTERY_DS2781) += ds2781_battery.o
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749
drivers/power/supply/cw2015_battery.c
Normal file
749
drivers/power/supply/cw2015_battery.c
Normal file
@ -0,0 +1,749 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Fuel gauge driver for CellWise 2013 / 2015
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*
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* Copyright (C) 2012, RockChip
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* Copyright (C) 2020, Tobias Schramm
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*
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* Authors: xuhuicong <xhc@rock-chips.com>
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* Authors: Tobias Schramm <t.schramm@manjaro.org>
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*/
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#include <linux/bits.h>
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#include <linux/delay.h>
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#include <linux/i2c.h>
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#include <linux/gfp.h>
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#include <linux/gpio/consumer.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/power_supply.h>
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#include <linux/property.h>
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#include <linux/regmap.h>
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#include <linux/time.h>
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#include <linux/workqueue.h>
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#define CW2015_SIZE_BATINFO 64
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#define CW2015_RESET_TRIES 5
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#define CW2015_REG_VERSION 0x00
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#define CW2015_REG_VCELL 0x02
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#define CW2015_REG_SOC 0x04
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#define CW2015_REG_RRT_ALERT 0x06
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#define CW2015_REG_CONFIG 0x08
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#define CW2015_REG_MODE 0x0A
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#define CW2015_REG_BATINFO 0x10
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#define CW2015_MODE_SLEEP_MASK GENMASK(7, 6)
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#define CW2015_MODE_SLEEP (0x03 << 6)
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#define CW2015_MODE_NORMAL (0x00 << 6)
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#define CW2015_MODE_QUICK_START (0x03 << 4)
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#define CW2015_MODE_RESTART (0x0f << 0)
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#define CW2015_CONFIG_UPDATE_FLG (0x01 << 1)
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#define CW2015_ATHD(x) ((x) << 3)
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#define CW2015_MASK_ATHD GENMASK(7, 3)
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#define CW2015_MASK_SOC GENMASK(12, 0)
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/* reset gauge of no valid state of charge could be polled for 40s */
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#define CW2015_BAT_SOC_ERROR_MS (40 * MSEC_PER_SEC)
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/* reset gauge if state of charge stuck for half an hour during charging */
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#define CW2015_BAT_CHARGING_STUCK_MS (1800 * MSEC_PER_SEC)
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/* poll interval from CellWise GPL Android driver example */
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#define CW2015_DEFAULT_POLL_INTERVAL_MS 8000
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#define CW2015_AVERAGING_SAMPLES 3
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struct cw_battery {
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struct device *dev;
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struct workqueue_struct *battery_workqueue;
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struct delayed_work battery_delay_work;
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struct regmap *regmap;
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struct power_supply *rk_bat;
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struct power_supply_battery_info battery;
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u8 *bat_profile;
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bool charger_attached;
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bool battery_changed;
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int soc;
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int voltage_mv;
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int status;
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int time_to_empty;
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int charge_count;
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u32 poll_interval_ms;
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u8 alert_level;
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unsigned int read_errors;
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unsigned int charge_stuck_cnt;
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};
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static int cw_read_word(struct cw_battery *cw_bat, u8 reg, u16 *val)
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{
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__be16 value;
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int ret;
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ret = regmap_bulk_read(cw_bat->regmap, reg, &value, sizeof(value));
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if (ret)
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return ret;
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*val = be16_to_cpu(value);
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return 0;
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}
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int cw_update_profile(struct cw_battery *cw_bat)
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{
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int ret;
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unsigned int reg_val;
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u8 reset_val;
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/* make sure gauge is not in sleep mode */
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ret = regmap_read(cw_bat->regmap, CW2015_REG_MODE, ®_val);
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if (ret)
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return ret;
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reset_val = reg_val;
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if ((reg_val & CW2015_MODE_SLEEP_MASK) == CW2015_MODE_SLEEP) {
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dev_err(cw_bat->dev,
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"Gauge is in sleep mode, can't update battery info\n");
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return -EINVAL;
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}
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/* write new battery info */
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ret = regmap_raw_write(cw_bat->regmap, CW2015_REG_BATINFO,
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cw_bat->bat_profile,
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CW2015_SIZE_BATINFO);
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if (ret)
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return ret;
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/* set config update flag */
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reg_val |= CW2015_CONFIG_UPDATE_FLG;
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reg_val &= ~CW2015_MASK_ATHD;
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reg_val |= CW2015_ATHD(cw_bat->alert_level);
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ret = regmap_write(cw_bat->regmap, CW2015_REG_CONFIG, reg_val);
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if (ret)
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return ret;
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/* reset gauge to apply new battery profile */
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reset_val &= ~CW2015_MODE_RESTART;
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reg_val = reset_val | CW2015_MODE_RESTART;
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ret = regmap_write(cw_bat->regmap, CW2015_REG_MODE, reg_val);
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if (ret)
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return ret;
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/* wait for gauge to reset */
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msleep(20);
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/* clear reset flag */
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ret = regmap_write(cw_bat->regmap, CW2015_REG_MODE, reset_val);
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if (ret)
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return ret;
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/* wait for gauge to become ready */
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ret = regmap_read_poll_timeout(cw_bat->regmap, CW2015_REG_SOC,
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reg_val, reg_val <= 100,
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10 * USEC_PER_MSEC, 10 * USEC_PER_SEC);
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if (ret)
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dev_err(cw_bat->dev,
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"Gauge did not become ready after profile upload\n");
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else
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dev_dbg(cw_bat->dev, "Battery profile updated\n");
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return ret;
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}
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static int cw_init(struct cw_battery *cw_bat)
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{
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int ret;
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unsigned int reg_val = CW2015_MODE_SLEEP;
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if ((reg_val & CW2015_MODE_SLEEP_MASK) == CW2015_MODE_SLEEP) {
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reg_val = CW2015_MODE_NORMAL;
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ret = regmap_write(cw_bat->regmap, CW2015_REG_MODE, reg_val);
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if (ret)
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return ret;
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}
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ret = regmap_read(cw_bat->regmap, CW2015_REG_CONFIG, ®_val);
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if (ret)
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return ret;
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if ((reg_val & CW2015_MASK_ATHD) != CW2015_ATHD(cw_bat->alert_level)) {
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dev_dbg(cw_bat->dev, "Setting new alert level\n");
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reg_val &= ~CW2015_MASK_ATHD;
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reg_val |= ~CW2015_ATHD(cw_bat->alert_level);
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ret = regmap_write(cw_bat->regmap, CW2015_REG_CONFIG, reg_val);
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if (ret)
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return ret;
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}
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ret = regmap_read(cw_bat->regmap, CW2015_REG_CONFIG, ®_val);
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if (ret)
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return ret;
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if (!(reg_val & CW2015_CONFIG_UPDATE_FLG)) {
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dev_dbg(cw_bat->dev,
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"Battery profile not present, uploading battery profile\n");
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if (cw_bat->bat_profile) {
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ret = cw_update_profile(cw_bat);
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if (ret) {
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dev_err(cw_bat->dev,
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"Failed to upload battery profile\n");
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return ret;
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}
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} else {
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dev_warn(cw_bat->dev,
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"No profile specified, continuing without profile\n");
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}
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} else if (cw_bat->bat_profile) {
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u8 bat_info[CW2015_SIZE_BATINFO];
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ret = regmap_raw_read(cw_bat->regmap, CW2015_REG_BATINFO,
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bat_info, CW2015_SIZE_BATINFO);
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if (ret) {
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dev_err(cw_bat->dev,
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"Failed to read stored battery profile\n");
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return ret;
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}
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if (memcmp(bat_info, cw_bat->bat_profile, CW2015_SIZE_BATINFO)) {
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dev_warn(cw_bat->dev, "Replacing stored battery profile\n");
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ret = cw_update_profile(cw_bat);
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if (ret)
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return ret;
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}
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} else {
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dev_warn(cw_bat->dev,
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"Can't check current battery profile, no profile provided\n");
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}
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dev_dbg(cw_bat->dev, "Battery profile configured\n");
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return 0;
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}
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static int cw_power_on_reset(struct cw_battery *cw_bat)
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{
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int ret;
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unsigned char reset_val;
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reset_val = CW2015_MODE_SLEEP;
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ret = regmap_write(cw_bat->regmap, CW2015_REG_MODE, reset_val);
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if (ret)
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return ret;
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/* wait for gauge to enter sleep */
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msleep(20);
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reset_val = CW2015_MODE_NORMAL;
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ret = regmap_write(cw_bat->regmap, CW2015_REG_MODE, reset_val);
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if (ret)
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return ret;
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ret = cw_init(cw_bat);
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if (ret)
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return ret;
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return 0;
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}
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#define HYSTERESIS(current, previous, up, down) \
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(((current) < (previous) + (up)) && ((current) > (previous) - (down)))
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static int cw_get_soc(struct cw_battery *cw_bat)
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{
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unsigned int soc;
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int ret;
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ret = regmap_read(cw_bat->regmap, CW2015_REG_SOC, &soc);
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if (ret)
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return ret;
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if (soc > 100) {
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int max_error_cycles =
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CW2015_BAT_SOC_ERROR_MS / cw_bat->poll_interval_ms;
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dev_err(cw_bat->dev, "Invalid SoC %d%%\n", soc);
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cw_bat->read_errors++;
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if (cw_bat->read_errors > max_error_cycles) {
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dev_warn(cw_bat->dev,
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"Too many invalid SoC reports, resetting gauge\n");
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cw_power_on_reset(cw_bat);
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cw_bat->read_errors = 0;
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}
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return cw_bat->soc;
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}
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cw_bat->read_errors = 0;
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/* Reset gauge if stuck while charging */
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if (cw_bat->status == POWER_SUPPLY_STATUS_CHARGING && soc == cw_bat->soc) {
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int max_stuck_cycles =
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CW2015_BAT_CHARGING_STUCK_MS / cw_bat->poll_interval_ms;
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cw_bat->charge_stuck_cnt++;
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if (cw_bat->charge_stuck_cnt > max_stuck_cycles) {
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dev_warn(cw_bat->dev,
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"SoC stuck @%u%%, resetting gauge\n", soc);
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cw_power_on_reset(cw_bat);
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cw_bat->charge_stuck_cnt = 0;
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}
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} else {
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cw_bat->charge_stuck_cnt = 0;
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}
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/* Ignore voltage dips during charge */
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if (cw_bat->charger_attached && HYSTERESIS(soc, cw_bat->soc, 0, 3))
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soc = cw_bat->soc;
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/* Ignore voltage spikes during discharge */
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if (!cw_bat->charger_attached && HYSTERESIS(soc, cw_bat->soc, 3, 0))
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soc = cw_bat->soc;
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return soc;
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}
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static int cw_get_voltage(struct cw_battery *cw_bat)
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{
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||||||
|
int ret, i, voltage_mv;
|
||||||
|
u16 reg_val;
|
||||||
|
u32 avg = 0;
|
||||||
|
|
||||||
|
for (i = 0; i < CW2015_AVERAGING_SAMPLES; i++) {
|
||||||
|
ret = cw_read_word(cw_bat, CW2015_REG_VCELL, ®_val);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
avg += reg_val;
|
||||||
|
}
|
||||||
|
avg /= CW2015_AVERAGING_SAMPLES;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* 305 uV per ADC step
|
||||||
|
* Use 312 / 1024 as efficient approximation of 305 / 1000
|
||||||
|
* Negligible error of 0.1%
|
||||||
|
*/
|
||||||
|
voltage_mv = avg * 312 / 1024;
|
||||||
|
|
||||||
|
dev_dbg(cw_bat->dev, "Read voltage: %d mV, raw=0x%04x\n",
|
||||||
|
voltage_mv, reg_val);
|
||||||
|
return voltage_mv;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int cw_get_time_to_empty(struct cw_battery *cw_bat)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
u16 value16;
|
||||||
|
|
||||||
|
ret = cw_read_word(cw_bat, CW2015_REG_RRT_ALERT, &value16);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
return value16 & CW2015_MASK_SOC;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void cw_update_charge_status(struct cw_battery *cw_bat)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
ret = power_supply_am_i_supplied(cw_bat->rk_bat);
|
||||||
|
if (ret < 0) {
|
||||||
|
dev_warn(cw_bat->dev, "Failed to get supply state: %d\n", ret);
|
||||||
|
} else {
|
||||||
|
bool charger_attached;
|
||||||
|
|
||||||
|
charger_attached = !!ret;
|
||||||
|
if (cw_bat->charger_attached != charger_attached) {
|
||||||
|
cw_bat->battery_changed = true;
|
||||||
|
if (charger_attached)
|
||||||
|
cw_bat->charge_count++;
|
||||||
|
}
|
||||||
|
cw_bat->charger_attached = charger_attached;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
static void cw_update_soc(struct cw_battery *cw_bat)
|
||||||
|
{
|
||||||
|
int soc;
|
||||||
|
|
||||||
|
soc = cw_get_soc(cw_bat);
|
||||||
|
if (soc < 0)
|
||||||
|
dev_err(cw_bat->dev, "Failed to get SoC from gauge: %d\n", soc);
|
||||||
|
else if (cw_bat->soc != soc) {
|
||||||
|
cw_bat->soc = soc;
|
||||||
|
cw_bat->battery_changed = true;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
static void cw_update_voltage(struct cw_battery *cw_bat)
|
||||||
|
{
|
||||||
|
int voltage_mv;
|
||||||
|
|
||||||
|
voltage_mv = cw_get_voltage(cw_bat);
|
||||||
|
if (voltage_mv < 0)
|
||||||
|
dev_err(cw_bat->dev, "Failed to get voltage from gauge: %d\n",
|
||||||
|
voltage_mv);
|
||||||
|
else
|
||||||
|
cw_bat->voltage_mv = voltage_mv;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void cw_update_status(struct cw_battery *cw_bat)
|
||||||
|
{
|
||||||
|
int status = POWER_SUPPLY_STATUS_DISCHARGING;
|
||||||
|
|
||||||
|
if (cw_bat->charger_attached) {
|
||||||
|
if (cw_bat->soc >= 100)
|
||||||
|
status = POWER_SUPPLY_STATUS_FULL;
|
||||||
|
else
|
||||||
|
status = POWER_SUPPLY_STATUS_CHARGING;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (cw_bat->status != status)
|
||||||
|
cw_bat->battery_changed = true;
|
||||||
|
cw_bat->status = status;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void cw_update_time_to_empty(struct cw_battery *cw_bat)
|
||||||
|
{
|
||||||
|
int time_to_empty;
|
||||||
|
|
||||||
|
time_to_empty = cw_get_time_to_empty(cw_bat);
|
||||||
|
if (time_to_empty < 0)
|
||||||
|
dev_err(cw_bat->dev, "Failed to get time to empty from gauge: %d\n",
|
||||||
|
time_to_empty);
|
||||||
|
else if (cw_bat->time_to_empty != time_to_empty) {
|
||||||
|
cw_bat->time_to_empty = time_to_empty;
|
||||||
|
cw_bat->battery_changed = true;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
static void cw_bat_work(struct work_struct *work)
|
||||||
|
{
|
||||||
|
struct delayed_work *delay_work;
|
||||||
|
struct cw_battery *cw_bat;
|
||||||
|
int ret;
|
||||||
|
unsigned int reg_val;
|
||||||
|
|
||||||
|
delay_work = to_delayed_work(work);
|
||||||
|
cw_bat = container_of(delay_work, struct cw_battery, battery_delay_work);
|
||||||
|
ret = regmap_read(cw_bat->regmap, CW2015_REG_MODE, ®_val);
|
||||||
|
if (ret) {
|
||||||
|
dev_err(cw_bat->dev, "Failed to read mode from gauge: %d\n", ret);
|
||||||
|
} else {
|
||||||
|
if ((reg_val & CW2015_MODE_SLEEP_MASK) == CW2015_MODE_SLEEP) {
|
||||||
|
int i;
|
||||||
|
|
||||||
|
for (i = 0; i < CW2015_RESET_TRIES; i++) {
|
||||||
|
if (!cw_power_on_reset(cw_bat))
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
cw_update_soc(cw_bat);
|
||||||
|
cw_update_voltage(cw_bat);
|
||||||
|
cw_update_charge_status(cw_bat);
|
||||||
|
cw_update_status(cw_bat);
|
||||||
|
cw_update_time_to_empty(cw_bat);
|
||||||
|
}
|
||||||
|
dev_dbg(cw_bat->dev, "charger_attached = %d\n", cw_bat->charger_attached);
|
||||||
|
dev_dbg(cw_bat->dev, "status = %d\n", cw_bat->status);
|
||||||
|
dev_dbg(cw_bat->dev, "soc = %d%%\n", cw_bat->soc);
|
||||||
|
dev_dbg(cw_bat->dev, "voltage = %dmV\n", cw_bat->voltage_mv);
|
||||||
|
|
||||||
|
if (cw_bat->battery_changed)
|
||||||
|
power_supply_changed(cw_bat->rk_bat);
|
||||||
|
cw_bat->battery_changed = false;
|
||||||
|
|
||||||
|
queue_delayed_work(cw_bat->battery_workqueue,
|
||||||
|
&cw_bat->battery_delay_work,
|
||||||
|
msecs_to_jiffies(cw_bat->poll_interval_ms));
|
||||||
|
}
|
||||||
|
|
||||||
|
static bool cw_battery_valid_time_to_empty(struct cw_battery *cw_bat)
|
||||||
|
{
|
||||||
|
return cw_bat->time_to_empty > 0 &&
|
||||||
|
cw_bat->time_to_empty < CW2015_MASK_SOC &&
|
||||||
|
cw_bat->status == POWER_SUPPLY_STATUS_DISCHARGING;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int cw_battery_get_property(struct power_supply *psy,
|
||||||
|
enum power_supply_property psp,
|
||||||
|
union power_supply_propval *val)
|
||||||
|
{
|
||||||
|
struct cw_battery *cw_bat;
|
||||||
|
|
||||||
|
cw_bat = power_supply_get_drvdata(psy);
|
||||||
|
switch (psp) {
|
||||||
|
case POWER_SUPPLY_PROP_CAPACITY:
|
||||||
|
val->intval = cw_bat->soc;
|
||||||
|
break;
|
||||||
|
|
||||||
|
case POWER_SUPPLY_PROP_STATUS:
|
||||||
|
val->intval = cw_bat->status;
|
||||||
|
break;
|
||||||
|
|
||||||
|
case POWER_SUPPLY_PROP_PRESENT:
|
||||||
|
val->intval = !!cw_bat->voltage_mv;
|
||||||
|
break;
|
||||||
|
|
||||||
|
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
|
||||||
|
val->intval = cw_bat->voltage_mv * 1000;
|
||||||
|
break;
|
||||||
|
|
||||||
|
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
|
||||||
|
if (cw_battery_valid_time_to_empty(cw_bat))
|
||||||
|
val->intval = cw_bat->time_to_empty;
|
||||||
|
else
|
||||||
|
val->intval = 0;
|
||||||
|
break;
|
||||||
|
|
||||||
|
case POWER_SUPPLY_PROP_TECHNOLOGY:
|
||||||
|
val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
|
||||||
|
break;
|
||||||
|
|
||||||
|
case POWER_SUPPLY_PROP_CHARGE_COUNTER:
|
||||||
|
val->intval = cw_bat->charge_count;
|
||||||
|
break;
|
||||||
|
|
||||||
|
case POWER_SUPPLY_PROP_CHARGE_FULL:
|
||||||
|
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
|
||||||
|
if (cw_bat->battery.charge_full_design_uah > 0)
|
||||||
|
val->intval = cw_bat->battery.charge_full_design_uah;
|
||||||
|
else
|
||||||
|
val->intval = 0;
|
||||||
|
break;
|
||||||
|
|
||||||
|
case POWER_SUPPLY_PROP_CURRENT_NOW:
|
||||||
|
if (cw_battery_valid_time_to_empty(cw_bat) &&
|
||||||
|
cw_bat->battery.charge_full_design_uah > 0) {
|
||||||
|
/* calculate remaining capacity */
|
||||||
|
val->intval = cw_bat->battery.charge_full_design_uah;
|
||||||
|
val->intval = val->intval * cw_bat->soc / 100;
|
||||||
|
|
||||||
|
/* estimate current based on time to empty */
|
||||||
|
val->intval = 60 * val->intval / cw_bat->time_to_empty;
|
||||||
|
} else {
|
||||||
|
val->intval = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
break;
|
||||||
|
|
||||||
|
default:
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static enum power_supply_property cw_battery_properties[] = {
|
||||||
|
POWER_SUPPLY_PROP_CAPACITY,
|
||||||
|
POWER_SUPPLY_PROP_STATUS,
|
||||||
|
POWER_SUPPLY_PROP_PRESENT,
|
||||||
|
POWER_SUPPLY_PROP_VOLTAGE_NOW,
|
||||||
|
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
|
||||||
|
POWER_SUPPLY_PROP_TECHNOLOGY,
|
||||||
|
POWER_SUPPLY_PROP_CHARGE_COUNTER,
|
||||||
|
POWER_SUPPLY_PROP_CHARGE_FULL,
|
||||||
|
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
|
||||||
|
POWER_SUPPLY_PROP_CURRENT_NOW,
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct power_supply_desc cw2015_bat_desc = {
|
||||||
|
.name = "cw2015-battery",
|
||||||
|
.type = POWER_SUPPLY_TYPE_BATTERY,
|
||||||
|
.properties = cw_battery_properties,
|
||||||
|
.num_properties = ARRAY_SIZE(cw_battery_properties),
|
||||||
|
.get_property = cw_battery_get_property,
|
||||||
|
};
|
||||||
|
|
||||||
|
static int cw2015_parse_properties(struct cw_battery *cw_bat)
|
||||||
|
{
|
||||||
|
struct device *dev = cw_bat->dev;
|
||||||
|
int length;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
length = device_property_count_u8(dev, "cellwise,battery-profile");
|
||||||
|
if (length < 0) {
|
||||||
|
dev_warn(cw_bat->dev,
|
||||||
|
"No battery-profile found, using current flash contents\n");
|
||||||
|
} else if (length != CW2015_SIZE_BATINFO) {
|
||||||
|
dev_err(cw_bat->dev, "battery-profile must be %d bytes\n",
|
||||||
|
CW2015_SIZE_BATINFO);
|
||||||
|
return -EINVAL;
|
||||||
|
} else {
|
||||||
|
cw_bat->bat_profile = devm_kzalloc(dev, length, GFP_KERNEL);
|
||||||
|
if (!cw_bat->bat_profile)
|
||||||
|
return -ENOMEM;
|
||||||
|
|
||||||
|
ret = device_property_read_u8_array(dev,
|
||||||
|
"cellwise,battery-profile",
|
||||||
|
cw_bat->bat_profile,
|
||||||
|
length);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
ret = device_property_read_u32(dev, "cellwise,monitor-interval-ms",
|
||||||
|
&cw_bat->poll_interval_ms);
|
||||||
|
if (ret) {
|
||||||
|
dev_dbg(cw_bat->dev, "Using default poll interval\n");
|
||||||
|
cw_bat->poll_interval_ms = CW2015_DEFAULT_POLL_INTERVAL_MS;
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static const struct regmap_range regmap_ranges_rd_yes[] = {
|
||||||
|
regmap_reg_range(CW2015_REG_VERSION, CW2015_REG_VERSION),
|
||||||
|
regmap_reg_range(CW2015_REG_VCELL, CW2015_REG_CONFIG),
|
||||||
|
regmap_reg_range(CW2015_REG_MODE, CW2015_REG_MODE),
|
||||||
|
regmap_reg_range(CW2015_REG_BATINFO,
|
||||||
|
CW2015_REG_BATINFO + CW2015_SIZE_BATINFO - 1),
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct regmap_access_table regmap_rd_table = {
|
||||||
|
.yes_ranges = regmap_ranges_rd_yes,
|
||||||
|
.n_yes_ranges = 4,
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct regmap_range regmap_ranges_wr_yes[] = {
|
||||||
|
regmap_reg_range(CW2015_REG_RRT_ALERT, CW2015_REG_CONFIG),
|
||||||
|
regmap_reg_range(CW2015_REG_MODE, CW2015_REG_MODE),
|
||||||
|
regmap_reg_range(CW2015_REG_BATINFO,
|
||||||
|
CW2015_REG_BATINFO + CW2015_SIZE_BATINFO - 1),
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct regmap_access_table regmap_wr_table = {
|
||||||
|
.yes_ranges = regmap_ranges_wr_yes,
|
||||||
|
.n_yes_ranges = 3,
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct regmap_range regmap_ranges_vol_yes[] = {
|
||||||
|
regmap_reg_range(CW2015_REG_VCELL, CW2015_REG_SOC + 1),
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct regmap_access_table regmap_vol_table = {
|
||||||
|
.yes_ranges = regmap_ranges_vol_yes,
|
||||||
|
.n_yes_ranges = 1,
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct regmap_config cw2015_regmap_config = {
|
||||||
|
.reg_bits = 8,
|
||||||
|
.val_bits = 8,
|
||||||
|
.rd_table = ®map_rd_table,
|
||||||
|
.wr_table = ®map_wr_table,
|
||||||
|
.volatile_table = ®map_vol_table,
|
||||||
|
.max_register = CW2015_REG_BATINFO + CW2015_SIZE_BATINFO - 1,
|
||||||
|
};
|
||||||
|
|
||||||
|
static int cw_bat_probe(struct i2c_client *client)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
struct cw_battery *cw_bat;
|
||||||
|
struct power_supply_config psy_cfg = { 0 };
|
||||||
|
|
||||||
|
cw_bat = devm_kzalloc(&client->dev, sizeof(*cw_bat), GFP_KERNEL);
|
||||||
|
if (!cw_bat)
|
||||||
|
return -ENOMEM;
|
||||||
|
|
||||||
|
i2c_set_clientdata(client, cw_bat);
|
||||||
|
cw_bat->dev = &client->dev;
|
||||||
|
cw_bat->soc = 1;
|
||||||
|
|
||||||
|
ret = cw2015_parse_properties(cw_bat);
|
||||||
|
if (ret) {
|
||||||
|
dev_err(cw_bat->dev, "Failed to parse cw2015 properties\n");
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
cw_bat->regmap = devm_regmap_init_i2c(client, &cw2015_regmap_config);
|
||||||
|
if (IS_ERR(cw_bat->regmap)) {
|
||||||
|
dev_err(cw_bat->dev, "Failed to allocate regmap: %ld\n",
|
||||||
|
PTR_ERR(cw_bat->regmap));
|
||||||
|
return PTR_ERR(cw_bat->regmap);
|
||||||
|
}
|
||||||
|
|
||||||
|
ret = cw_init(cw_bat);
|
||||||
|
if (ret) {
|
||||||
|
dev_err(cw_bat->dev, "Init failed: %d\n", ret);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
psy_cfg.drv_data = cw_bat;
|
||||||
|
psy_cfg.fwnode = dev_fwnode(cw_bat->dev);
|
||||||
|
|
||||||
|
cw_bat->rk_bat = devm_power_supply_register(&client->dev,
|
||||||
|
&cw2015_bat_desc,
|
||||||
|
&psy_cfg);
|
||||||
|
if (IS_ERR(cw_bat->rk_bat)) {
|
||||||
|
dev_err(cw_bat->dev, "Failed to register power supply\n");
|
||||||
|
return PTR_ERR(cw_bat->rk_bat);
|
||||||
|
}
|
||||||
|
|
||||||
|
ret = power_supply_get_battery_info(cw_bat->rk_bat, &cw_bat->battery);
|
||||||
|
if (ret) {
|
||||||
|
dev_warn(cw_bat->dev,
|
||||||
|
"No monitored battery, some properties will be missing\n");
|
||||||
|
}
|
||||||
|
|
||||||
|
cw_bat->battery_workqueue = create_singlethread_workqueue("rk_battery");
|
||||||
|
INIT_DELAYED_WORK(&cw_bat->battery_delay_work, cw_bat_work);
|
||||||
|
queue_delayed_work(cw_bat->battery_workqueue,
|
||||||
|
&cw_bat->battery_delay_work, msecs_to_jiffies(10));
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int __maybe_unused cw_bat_suspend(struct device *dev)
|
||||||
|
{
|
||||||
|
struct i2c_client *client = to_i2c_client(dev);
|
||||||
|
struct cw_battery *cw_bat = i2c_get_clientdata(client);
|
||||||
|
|
||||||
|
cancel_delayed_work_sync(&cw_bat->battery_delay_work);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int __maybe_unused cw_bat_resume(struct device *dev)
|
||||||
|
{
|
||||||
|
struct i2c_client *client = to_i2c_client(dev);
|
||||||
|
struct cw_battery *cw_bat = i2c_get_clientdata(client);
|
||||||
|
|
||||||
|
queue_delayed_work(cw_bat->battery_workqueue,
|
||||||
|
&cw_bat->battery_delay_work, 0);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
SIMPLE_DEV_PM_OPS(cw_bat_pm_ops, cw_bat_suspend, cw_bat_resume);
|
||||||
|
|
||||||
|
static int cw_bat_remove(struct i2c_client *client)
|
||||||
|
{
|
||||||
|
struct cw_battery *cw_bat = i2c_get_clientdata(client);
|
||||||
|
|
||||||
|
cancel_delayed_work_sync(&cw_bat->battery_delay_work);
|
||||||
|
power_supply_put_battery_info(cw_bat->rk_bat, &cw_bat->battery);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static const struct i2c_device_id cw_bat_id_table[] = {
|
||||||
|
{ "cw2015", 0 },
|
||||||
|
{ }
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct of_device_id cw2015_of_match[] = {
|
||||||
|
{ .compatible = "cellwise,cw2015" },
|
||||||
|
{ }
|
||||||
|
};
|
||||||
|
MODULE_DEVICE_TABLE(of, cw2015_of_match);
|
||||||
|
|
||||||
|
static struct i2c_driver cw_bat_driver = {
|
||||||
|
.driver = {
|
||||||
|
.name = "cw2015",
|
||||||
|
.pm = &cw_bat_pm_ops,
|
||||||
|
},
|
||||||
|
.probe_new = cw_bat_probe,
|
||||||
|
.remove = cw_bat_remove,
|
||||||
|
.id_table = cw_bat_id_table,
|
||||||
|
};
|
||||||
|
|
||||||
|
module_i2c_driver(cw_bat_driver);
|
||||||
|
|
||||||
|
MODULE_AUTHOR("xhc<xhc@rock-chips.com>");
|
||||||
|
MODULE_AUTHOR("Tobias Schramm <t.schramm@manjaro.org>");
|
||||||
|
MODULE_DESCRIPTION("cw2015/cw2013 battery driver");
|
||||||
|
MODULE_LICENSE("GPL");
|
||||||
Loading…
Reference in New Issue
Block a user