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b220f31147
- bq25890: add charge voltage/current support - bd99954: convert to linear range - convert all i2c drivers to use probe_new - misc. fixes and cleanups -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEE72YNB0Y/i3JqeVQT2O7X88g7+poFAmOc3R8ACgkQ2O7X88g7 +pogDg//dX3yOaONJfH5Bv71MPnaNO11bxeKdbd/jt5L1Mm1RnB4q6fhEotNExco Fks/n0gle6vUl3LSOa8WlyCUrrgLvNKqKNFG07KVDbXghEL/5QxreAkIKRhI3gTS GKFKsjS0AlFPv+3ZssqBQXSRtfIM99ql+Fo7II4EynEQpXv8lB++leUI06cT0kgw BFGXBGMbPIVvrdaA8zTGw8cyj0rbxUJUSpLnfjNNp5GWn+GphxWCZqP99iRUcGJ1 46PUH/TBBCv17Eq9evXtMAkesxXClidK3HjaacCliVLdauJTQdZIf5vT88fsYddM 8KBavuspDN7gSWS30XbcL563fNch/3bF/5Oit0heSGgU24ccxs48Y+GfZM2GoI2l ZXbNgAWThEj0z4nhNDriJb16R3/hfhvIdPc7MEBmUiWLm+4dufrV+B1eiOIH7eA6 gfGpQXC6wnP7NTDX4EvFhKt1WgubW80eisVb2Pkux768ZTsToBrXSrBLDALHjBQO sOVsiqaMgF18feOAW8XAklfgpa+ms/IplSdTm/tIlh6pKaRlxD/FP/6bsnolzhFp /It5i+F+w01p+sgLdkRzGxkDRc4/Z+WsOA6G+Ya/AMZph324nfChA3B1S0jOdch2 8hVXFhWzwQXuOVA0ggvhDrlZVDa+etq7pSexXAO6sjHbm2hpzRE= =xxhs -----END PGP SIGNATURE----- Merge tag 'for-v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply Pull power supply and reset updates from Sebastian Reichel: - bq25890: add charge voltage/current support - bd99954: convert to linear range - convert all i2c drivers to use probe_new - misc fixes and cleanups * tag 'for-v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: (51 commits) power: supply: fix null pointer dereferencing in power_supply_get_battery_info power: supply: bq25890: Fix usb-notifier probe and remove races power: supply: bq25890: Ensure pump_express_work is cancelled on remove power: supply: Fix refcount leak in rk817_charger_probe power: supply: bq25890: Only use pdata->regulator_init_data for vbus power: supply: ab8500: Fix error handling in ab8500_charger_init() power: supply: cw2015: Fix potential null-ptr-deref in cw_bat_probe() power: supply: z2_battery: Fix possible memleak in z2_batt_probe() power: supply: z2_battery: Convert to i2c's .probe_new() power: supply: ucs1002: Convert to i2c's .probe_new() power: supply: smb347: Convert to i2c's .probe_new() power: supply: sbs-manager: Convert to i2c's .probe_new() power: supply: sbs: Convert to i2c's .probe_new() power: supply: rt9455: Convert to i2c's .probe_new() power: supply: rt5033_battery: Convert to i2c's .probe_new() power: supply: max17042_battery: Convert to i2c's .probe_new() power: supply: max17040: Convert to i2c's .probe_new() power: supply: max14656: Convert to i2c's .probe_new() power: supply: ltc4162-l: Convert to i2c's .probe_new() power: supply: ltc2941: Convert to i2c's .probe_new() ...
1212 lines
35 KiB
C
1212 lines
35 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Charger Driver for Rockchip rk817
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*
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* Copyright (c) 2021 Maya Matuszczyk <maccraft123mc@gmail.com>
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*
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* Authors: Maya Matuszczyk <maccraft123mc@gmail.com>
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* Chris Morgan <macromorgan@hotmail.com>
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*/
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#include <asm/unaligned.h>
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#include <linux/devm-helpers.h>
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#include <linux/mfd/rk808.h>
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#include <linux/irq.h>
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#include <linux/of.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/regmap.h>
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/* Charging statuses reported by hardware register */
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enum rk817_charge_status {
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CHRG_OFF,
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DEAD_CHRG,
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TRICKLE_CHRG,
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CC_OR_CV_CHRG,
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CHARGE_FINISH,
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USB_OVER_VOL,
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BAT_TMP_ERR,
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BAT_TIM_ERR,
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};
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/*
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* Max charging current read to/written from hardware register.
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* Note how highest value corresponding to 0x7 is the lowest
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* current, this is per the datasheet.
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*/
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enum rk817_chg_cur {
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CHG_1A,
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CHG_1_5A,
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CHG_2A,
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CHG_2_5A,
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CHG_2_75A,
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CHG_3A,
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CHG_3_5A,
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CHG_0_5A,
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};
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struct rk817_charger {
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struct device *dev;
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struct rk808 *rk808;
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struct power_supply *bat_ps;
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struct power_supply *chg_ps;
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bool plugged_in;
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bool battery_present;
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/*
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* voltage_k and voltage_b values are used to calibrate the ADC
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* voltage readings. While they are documented in the BSP kernel and
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* datasheet as voltage_k and voltage_b, there is no further
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* information explaining them in more detail.
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*/
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uint32_t voltage_k;
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uint32_t voltage_b;
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/*
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* soc - state of charge - like the BSP this is stored as a percentage,
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* to the thousandth. BSP has a display state of charge (dsoc) and a
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* remaining state of charge (rsoc). This value will be used for both
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* purposes here so we don't do any fancy math to try and "smooth" the
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* charge and just report it as it is. Note for example an soc of 100
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* is stored as 100000, an soc of 50 is stored as 50000, etc.
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*/
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int soc;
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/*
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* Capacity of battery when fully charged, equal or less than design
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* capacity depending upon wear. BSP kernel saves to nvram in mAh,
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* so this value is in mAh not the standard uAh.
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*/
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int fcc_mah;
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/*
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* Calibrate the SOC on a fully charged battery, this way we can use
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* the calibrated SOC value to correct for columb counter drift.
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*/
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bool soc_cal;
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/* Implementation specific immutable properties from device tree */
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int res_div;
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int sleep_enter_current_ua;
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int sleep_filter_current_ua;
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int bat_charge_full_design_uah;
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int bat_voltage_min_design_uv;
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int bat_voltage_max_design_uv;
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/* Values updated periodically by driver for display. */
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int charge_now_uah;
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int volt_avg_uv;
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int cur_avg_ua;
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int max_chg_cur_ua;
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int max_chg_volt_uv;
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int charge_status;
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int charger_input_volt_avg_uv;
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/* Work queue to periodically update values. */
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struct delayed_work work;
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};
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/* ADC coefficients extracted from BSP kernel */
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#define ADC_TO_CURRENT(adc_value, res_div) \
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(adc_value * 172 / res_div)
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#define CURRENT_TO_ADC(current, samp_res) \
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(current * samp_res / 172)
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#define CHARGE_TO_ADC(capacity, res_div) \
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(capacity * res_div * 3600 / 172 * 1000)
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#define ADC_TO_CHARGE_UAH(adc_value, res_div) \
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(adc_value / 3600 * 172 / res_div)
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static int rk817_chg_cur_to_reg(u32 chg_cur_ma)
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{
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if (chg_cur_ma >= 3500)
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return CHG_3_5A;
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else if (chg_cur_ma >= 3000)
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return CHG_3A;
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else if (chg_cur_ma >= 2750)
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return CHG_2_75A;
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else if (chg_cur_ma >= 2500)
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return CHG_2_5A;
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else if (chg_cur_ma >= 2000)
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return CHG_2A;
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else if (chg_cur_ma >= 1500)
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return CHG_1_5A;
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else if (chg_cur_ma >= 1000)
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return CHG_1A;
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else if (chg_cur_ma >= 500)
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return CHG_0_5A;
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else
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return -EINVAL;
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}
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static int rk817_chg_cur_from_reg(u8 reg)
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{
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switch (reg) {
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case CHG_0_5A:
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return 500000;
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case CHG_1A:
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return 1000000;
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case CHG_1_5A:
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return 1500000;
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case CHG_2A:
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return 2000000;
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case CHG_2_5A:
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return 2500000;
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case CHG_2_75A:
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return 2750000;
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case CHG_3A:
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return 3000000;
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case CHG_3_5A:
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return 3500000;
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default:
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return -EINVAL;
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}
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}
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static void rk817_bat_calib_vol(struct rk817_charger *charger)
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{
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uint32_t vcalib0 = 0;
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uint32_t vcalib1 = 0;
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u8 bulk_reg[2];
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/* calibrate voltage */
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regmap_bulk_read(charger->rk808->regmap, RK817_GAS_GAUGE_VCALIB0_H,
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bulk_reg, 2);
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vcalib0 = get_unaligned_be16(bulk_reg);
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regmap_bulk_read(charger->rk808->regmap, RK817_GAS_GAUGE_VCALIB1_H,
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bulk_reg, 2);
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vcalib1 = get_unaligned_be16(bulk_reg);
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/* values were taken from BSP kernel */
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charger->voltage_k = (4025 - 2300) * 1000 /
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((vcalib1 - vcalib0) ? (vcalib1 - vcalib0) : 1);
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charger->voltage_b = 4025 - (charger->voltage_k * vcalib1) / 1000;
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}
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static void rk817_bat_calib_cur(struct rk817_charger *charger)
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{
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u8 bulk_reg[2];
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/* calibrate current */
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regmap_bulk_read(charger->rk808->regmap, RK817_GAS_GAUGE_IOFFSET_H,
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bulk_reg, 2);
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regmap_bulk_write(charger->rk808->regmap, RK817_GAS_GAUGE_CAL_OFFSET_H,
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bulk_reg, 2);
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}
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/*
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* note that only the fcc_mah is really used by this driver, the other values
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* are to ensure we can remain backwards compatible with the BSP kernel.
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*/
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static int rk817_record_battery_nvram_values(struct rk817_charger *charger)
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{
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u8 bulk_reg[3];
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int ret, rsoc;
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/*
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* write the soc value to the nvram location used by the BSP kernel
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* for the dsoc value.
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*/
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put_unaligned_le24(charger->soc, bulk_reg);
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ret = regmap_bulk_write(charger->rk808->regmap, RK817_GAS_GAUGE_BAT_R1,
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bulk_reg, 3);
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if (ret < 0)
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return ret;
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/*
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* write the remaining capacity in mah to the nvram location used by
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* the BSP kernel for the rsoc value.
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*/
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rsoc = (charger->soc * charger->fcc_mah) / 100000;
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put_unaligned_le24(rsoc, bulk_reg);
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ret = regmap_bulk_write(charger->rk808->regmap, RK817_GAS_GAUGE_DATA0,
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bulk_reg, 3);
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if (ret < 0)
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return ret;
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/* write the fcc_mah in mAh, just as the BSP kernel does. */
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put_unaligned_le24(charger->fcc_mah, bulk_reg);
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ret = regmap_bulk_write(charger->rk808->regmap, RK817_GAS_GAUGE_DATA3,
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bulk_reg, 3);
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if (ret < 0)
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return ret;
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return 0;
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}
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static int rk817_bat_calib_cap(struct rk817_charger *charger)
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{
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struct rk808 *rk808 = charger->rk808;
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int tmp, charge_now, charge_now_adc, volt_avg;
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u8 bulk_reg[4];
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/* Calibrate the soc and fcc on a fully charged battery */
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if (charger->charge_status == CHARGE_FINISH && (!charger->soc_cal)) {
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/*
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* soc should be 100000 and columb counter should show the full
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* charge capacity. Note that if the device is unplugged for a
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* period of several days the columb counter will have a large
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* margin of error, so setting it back to the full charge on
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* a completed charge cycle should correct this (my device was
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* showing 33% battery after 3 days unplugged when it should
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* have been closer to 95% based on voltage and charge
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* current).
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*/
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charger->soc = 100000;
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charge_now_adc = CHARGE_TO_ADC(charger->fcc_mah,
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charger->res_div);
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put_unaligned_be32(charge_now_adc, bulk_reg);
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regmap_bulk_write(rk808->regmap, RK817_GAS_GAUGE_Q_INIT_H3,
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bulk_reg, 4);
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charger->soc_cal = 1;
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dev_dbg(charger->dev,
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"Fully charged. SOC is %d, full capacity is %d\n",
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charger->soc, charger->fcc_mah * 1000);
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}
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/*
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* The columb counter can drift up slightly, so we should correct for
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* it. But don't correct it until we're at 100% soc.
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*/
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if (charger->charge_status == CHARGE_FINISH && charger->soc_cal) {
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regmap_bulk_read(rk808->regmap, RK817_GAS_GAUGE_Q_PRES_H3,
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bulk_reg, 4);
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charge_now_adc = get_unaligned_be32(bulk_reg);
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if (charge_now_adc < 0)
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return charge_now_adc;
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charge_now = ADC_TO_CHARGE_UAH(charge_now_adc,
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charger->res_div);
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/*
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* Re-init columb counter with updated values to correct drift.
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*/
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if (charge_now / 1000 > charger->fcc_mah) {
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dev_dbg(charger->dev,
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"Recalibrating columb counter to %d uah\n",
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charge_now);
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/*
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* Order of operations matters here to ensure we keep
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* enough precision until the last step to keep from
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* making needless updates to columb counter.
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*/
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charge_now_adc = CHARGE_TO_ADC(charger->fcc_mah,
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charger->res_div);
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put_unaligned_be32(charge_now_adc, bulk_reg);
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regmap_bulk_write(rk808->regmap,
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RK817_GAS_GAUGE_Q_INIT_H3,
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bulk_reg, 4);
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}
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}
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/*
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* Calibrate the fully charged capacity when we previously had a full
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* battery (soc_cal = 1) and are now empty (at or below minimum design
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* voltage). If our columb counter is still positive, subtract that
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* from our fcc value to get a calibrated fcc, and if our columb
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* counter is negative add that to our fcc (but not to exceed our
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* design capacity).
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*/
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regmap_bulk_read(charger->rk808->regmap, RK817_GAS_GAUGE_BAT_VOL_H,
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bulk_reg, 2);
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tmp = get_unaligned_be16(bulk_reg);
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volt_avg = (charger->voltage_k * tmp) + 1000 * charger->voltage_b;
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if (volt_avg <= charger->bat_voltage_min_design_uv &&
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charger->soc_cal) {
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regmap_bulk_read(rk808->regmap, RK817_GAS_GAUGE_Q_PRES_H3,
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bulk_reg, 4);
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charge_now_adc = get_unaligned_be32(bulk_reg);
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charge_now = ADC_TO_CHARGE_UAH(charge_now_adc,
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charger->res_div);
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/*
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* Note, if charge_now is negative this will add it (what we
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* want) and if it's positive this will subtract (also what
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* we want).
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*/
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charger->fcc_mah = charger->fcc_mah - (charge_now / 1000);
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dev_dbg(charger->dev,
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"Recalibrating full charge capacity to %d uah\n",
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charger->fcc_mah * 1000);
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}
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rk817_record_battery_nvram_values(charger);
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return 0;
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}
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static void rk817_read_props(struct rk817_charger *charger)
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{
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int tmp, reg;
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u8 bulk_reg[4];
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/*
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* Recalibrate voltage and current readings if we need to BSP does both
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* on CUR_CALIB_UPD, ignoring VOL_CALIB_UPD. Curiously enough, both
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* documentation and the BSP show that you perform an update if bit 7
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* is 1, but you clear the status by writing a 1 to bit 7.
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*/
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regmap_read(charger->rk808->regmap, RK817_GAS_GAUGE_ADC_CONFIG1, ®);
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if (reg & RK817_VOL_CUR_CALIB_UPD) {
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rk817_bat_calib_cur(charger);
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rk817_bat_calib_vol(charger);
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regmap_write_bits(charger->rk808->regmap,
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RK817_GAS_GAUGE_ADC_CONFIG1,
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RK817_VOL_CUR_CALIB_UPD,
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RK817_VOL_CUR_CALIB_UPD);
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}
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/* Update reported charge. */
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regmap_bulk_read(charger->rk808->regmap, RK817_GAS_GAUGE_Q_PRES_H3,
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bulk_reg, 4);
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tmp = get_unaligned_be32(bulk_reg);
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charger->charge_now_uah = ADC_TO_CHARGE_UAH(tmp, charger->res_div);
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if (charger->charge_now_uah < 0)
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charger->charge_now_uah = 0;
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if (charger->charge_now_uah > charger->fcc_mah * 1000)
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charger->charge_now_uah = charger->fcc_mah * 1000;
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/* Update soc based on reported charge. */
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charger->soc = charger->charge_now_uah * 100 / charger->fcc_mah;
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/* Update reported voltage. */
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regmap_bulk_read(charger->rk808->regmap, RK817_GAS_GAUGE_BAT_VOL_H,
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bulk_reg, 2);
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tmp = get_unaligned_be16(bulk_reg);
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charger->volt_avg_uv = (charger->voltage_k * tmp) + 1000 *
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charger->voltage_b;
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/*
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* Update reported current. Note value from registers is a signed 16
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* bit int.
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*/
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regmap_bulk_read(charger->rk808->regmap, RK817_GAS_GAUGE_BAT_CUR_H,
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bulk_reg, 2);
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tmp = (short int)get_unaligned_be16(bulk_reg);
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charger->cur_avg_ua = ADC_TO_CURRENT(tmp, charger->res_div);
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|
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/*
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* Update the max charge current. This value shouldn't change, but we
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* can read it to report what the PMIC says it is instead of simply
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* returning the default value.
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*/
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regmap_read(charger->rk808->regmap, RK817_PMIC_CHRG_OUT, ®);
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charger->max_chg_cur_ua =
|
|
rk817_chg_cur_from_reg(reg & RK817_CHRG_CUR_SEL);
|
|
|
|
/*
|
|
* Update max charge voltage. Like the max charge current this value
|
|
* shouldn't change, but we can report what the PMIC says.
|
|
*/
|
|
regmap_read(charger->rk808->regmap, RK817_PMIC_CHRG_OUT, ®);
|
|
charger->max_chg_volt_uv = ((((reg & RK817_CHRG_VOL_SEL) >> 4) *
|
|
50000) + 4100000);
|
|
|
|
/* Check if battery still present. */
|
|
regmap_read(charger->rk808->regmap, RK817_PMIC_CHRG_STS, ®);
|
|
charger->battery_present = (reg & RK817_BAT_EXS);
|
|
|
|
/* Get which type of charge we are using (if any). */
|
|
regmap_read(charger->rk808->regmap, RK817_PMIC_CHRG_STS, ®);
|
|
charger->charge_status = (reg >> 4) & 0x07;
|
|
|
|
/*
|
|
* Get charger input voltage. Note that on my example hardware (an
|
|
* Odroid Go Advance) the voltage of the power connector is measured
|
|
* on the register labelled USB in the datasheet; I don't know if this
|
|
* is how it is designed or just a quirk of the implementation. I
|
|
* believe this will also measure the voltage of the USB output when in
|
|
* OTG mode, if that is the case we may need to change this in the
|
|
* future to return 0 if the power supply status is offline (I can't
|
|
* test this with my current implementation. Also, when the voltage
|
|
* should be zero sometimes the ADC still shows a single bit (which
|
|
* would register as 20000uv). When this happens set it to 0.
|
|
*/
|
|
regmap_bulk_read(charger->rk808->regmap, RK817_GAS_GAUGE_USB_VOL_H,
|
|
bulk_reg, 2);
|
|
reg = get_unaligned_be16(bulk_reg);
|
|
if (reg > 1) {
|
|
tmp = ((charger->voltage_k * reg / 1000 + charger->voltage_b) *
|
|
60 / 46);
|
|
charger->charger_input_volt_avg_uv = tmp * 1000;
|
|
} else {
|
|
charger->charger_input_volt_avg_uv = 0;
|
|
}
|
|
|
|
/* Calibrate battery capacity and soc. */
|
|
rk817_bat_calib_cap(charger);
|
|
}
|
|
|
|
static int rk817_bat_get_prop(struct power_supply *ps,
|
|
enum power_supply_property prop,
|
|
union power_supply_propval *val)
|
|
{
|
|
struct rk817_charger *charger = power_supply_get_drvdata(ps);
|
|
|
|
switch (prop) {
|
|
case POWER_SUPPLY_PROP_PRESENT:
|
|
val->intval = charger->battery_present;
|
|
break;
|
|
case POWER_SUPPLY_PROP_STATUS:
|
|
if (charger->cur_avg_ua < 0) {
|
|
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
|
|
break;
|
|
}
|
|
switch (charger->charge_status) {
|
|
case CHRG_OFF:
|
|
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
|
|
break;
|
|
/*
|
|
* Dead charge is documented, but not explained. I never
|
|
* observed it but assume it's a pre-charge for a dead
|
|
* battery.
|
|
*/
|
|
case DEAD_CHRG:
|
|
case TRICKLE_CHRG:
|
|
case CC_OR_CV_CHRG:
|
|
val->intval = POWER_SUPPLY_STATUS_CHARGING;
|
|
break;
|
|
case CHARGE_FINISH:
|
|
val->intval = POWER_SUPPLY_STATUS_FULL;
|
|
break;
|
|
default:
|
|
val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
|
|
return -EINVAL;
|
|
|
|
}
|
|
break;
|
|
case POWER_SUPPLY_PROP_CHARGE_TYPE:
|
|
switch (charger->charge_status) {
|
|
case CHRG_OFF:
|
|
case CHARGE_FINISH:
|
|
val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
|
|
break;
|
|
case TRICKLE_CHRG:
|
|
val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
|
|
break;
|
|
case DEAD_CHRG:
|
|
case CC_OR_CV_CHRG:
|
|
val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
|
|
break;
|
|
default:
|
|
val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
|
|
break;
|
|
}
|
|
break;
|
|
case POWER_SUPPLY_PROP_CHARGE_FULL:
|
|
val->intval = charger->fcc_mah * 1000;
|
|
break;
|
|
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
|
|
val->intval = charger->bat_charge_full_design_uah;
|
|
break;
|
|
case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN:
|
|
val->intval = 0;
|
|
break;
|
|
case POWER_SUPPLY_PROP_CHARGE_NOW:
|
|
val->intval = charger->charge_now_uah;
|
|
break;
|
|
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
|
|
val->intval = charger->bat_voltage_min_design_uv;
|
|
break;
|
|
case POWER_SUPPLY_PROP_CAPACITY:
|
|
/* Add 500 so that values like 99999 are 100% not 99%. */
|
|
val->intval = (charger->soc + 500) / 1000;
|
|
if (val->intval > 100)
|
|
val->intval = 100;
|
|
if (val->intval < 0)
|
|
val->intval = 0;
|
|
break;
|
|
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
|
|
val->intval = charger->volt_avg_uv;
|
|
break;
|
|
case POWER_SUPPLY_PROP_CURRENT_AVG:
|
|
val->intval = charger->cur_avg_ua;
|
|
break;
|
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
|
|
val->intval = charger->max_chg_cur_ua;
|
|
break;
|
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
|
|
val->intval = charger->max_chg_volt_uv;
|
|
break;
|
|
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
|
|
val->intval = charger->bat_voltage_max_design_uv;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int rk817_chg_get_prop(struct power_supply *ps,
|
|
enum power_supply_property prop,
|
|
union power_supply_propval *val)
|
|
{
|
|
struct rk817_charger *charger = power_supply_get_drvdata(ps);
|
|
|
|
switch (prop) {
|
|
case POWER_SUPPLY_PROP_ONLINE:
|
|
val->intval = charger->plugged_in;
|
|
break;
|
|
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
|
|
/* max voltage from datasheet at 5.5v (default 5.0v) */
|
|
val->intval = 5500000;
|
|
break;
|
|
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
|
|
/* min voltage from datasheet at 3.8v (default 5.0v) */
|
|
val->intval = 3800000;
|
|
break;
|
|
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
|
|
val->intval = charger->charger_input_volt_avg_uv;
|
|
break;
|
|
/*
|
|
* While it's possible that other implementations could use different
|
|
* USB types, the current implementation for this PMIC (the Odroid Go
|
|
* Advance) only uses a dedicated charging port with no rx/tx lines.
|
|
*/
|
|
case POWER_SUPPLY_PROP_USB_TYPE:
|
|
val->intval = POWER_SUPPLY_USB_TYPE_DCP;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
|
|
}
|
|
|
|
static irqreturn_t rk817_plug_in_isr(int irq, void *cg)
|
|
{
|
|
struct rk817_charger *charger;
|
|
|
|
charger = (struct rk817_charger *)cg;
|
|
charger->plugged_in = 1;
|
|
power_supply_changed(charger->chg_ps);
|
|
power_supply_changed(charger->bat_ps);
|
|
/* try to recalibrate capacity if we hit full charge. */
|
|
charger->soc_cal = 0;
|
|
|
|
rk817_read_props(charger);
|
|
|
|
dev_dbg(charger->dev, "Power Cord Inserted\n");
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t rk817_plug_out_isr(int irq, void *cg)
|
|
{
|
|
struct rk817_charger *charger;
|
|
struct rk808 *rk808;
|
|
|
|
charger = (struct rk817_charger *)cg;
|
|
rk808 = charger->rk808;
|
|
charger->plugged_in = 0;
|
|
power_supply_changed(charger->bat_ps);
|
|
power_supply_changed(charger->chg_ps);
|
|
|
|
/*
|
|
* For some reason the bits of RK817_PMIC_CHRG_IN reset whenever the
|
|
* power cord is unplugged. This was not documented in the BSP kernel
|
|
* or the datasheet and only discovered by trial and error. Set minimum
|
|
* USB input voltage to 4.5v and enable USB voltage input limit.
|
|
*/
|
|
regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_IN,
|
|
RK817_USB_VLIM_SEL, (0x05 << 4));
|
|
regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_IN, RK817_USB_VLIM_EN,
|
|
(0x01 << 7));
|
|
|
|
/*
|
|
* Set average USB input current limit to 1.5A and enable USB current
|
|
* input limit.
|
|
*/
|
|
regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_IN,
|
|
RK817_USB_ILIM_SEL, 0x03);
|
|
regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_IN, RK817_USB_ILIM_EN,
|
|
(0x01 << 3));
|
|
|
|
rk817_read_props(charger);
|
|
|
|
dev_dbg(charger->dev, "Power Cord Removed\n");
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static enum power_supply_property rk817_bat_props[] = {
|
|
POWER_SUPPLY_PROP_PRESENT,
|
|
POWER_SUPPLY_PROP_STATUS,
|
|
POWER_SUPPLY_PROP_CHARGE_TYPE,
|
|
POWER_SUPPLY_PROP_CHARGE_FULL,
|
|
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
|
|
POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN,
|
|
POWER_SUPPLY_PROP_CHARGE_NOW,
|
|
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
|
|
POWER_SUPPLY_PROP_VOLTAGE_AVG,
|
|
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
|
|
POWER_SUPPLY_PROP_CURRENT_AVG,
|
|
POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
|
|
POWER_SUPPLY_PROP_CAPACITY,
|
|
POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
|
|
};
|
|
|
|
static enum power_supply_property rk817_chg_props[] = {
|
|
POWER_SUPPLY_PROP_ONLINE,
|
|
POWER_SUPPLY_PROP_USB_TYPE,
|
|
POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
|
|
POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
|
|
POWER_SUPPLY_PROP_VOLTAGE_AVG,
|
|
};
|
|
|
|
static enum power_supply_usb_type rk817_usb_type[] = {
|
|
POWER_SUPPLY_USB_TYPE_DCP,
|
|
POWER_SUPPLY_USB_TYPE_UNKNOWN,
|
|
};
|
|
|
|
static const struct power_supply_desc rk817_bat_desc = {
|
|
.name = "rk817-battery",
|
|
.type = POWER_SUPPLY_TYPE_BATTERY,
|
|
.properties = rk817_bat_props,
|
|
.num_properties = ARRAY_SIZE(rk817_bat_props),
|
|
.get_property = rk817_bat_get_prop,
|
|
};
|
|
|
|
static const struct power_supply_desc rk817_chg_desc = {
|
|
.name = "rk817-charger",
|
|
.type = POWER_SUPPLY_TYPE_USB,
|
|
.usb_types = rk817_usb_type,
|
|
.num_usb_types = ARRAY_SIZE(rk817_usb_type),
|
|
.properties = rk817_chg_props,
|
|
.num_properties = ARRAY_SIZE(rk817_chg_props),
|
|
.get_property = rk817_chg_get_prop,
|
|
};
|
|
|
|
static int rk817_read_battery_nvram_values(struct rk817_charger *charger)
|
|
{
|
|
u8 bulk_reg[3];
|
|
int ret;
|
|
|
|
/* Read the nvram data for full charge capacity. */
|
|
ret = regmap_bulk_read(charger->rk808->regmap,
|
|
RK817_GAS_GAUGE_DATA3, bulk_reg, 3);
|
|
if (ret < 0)
|
|
return ret;
|
|
charger->fcc_mah = get_unaligned_le24(bulk_reg);
|
|
|
|
/*
|
|
* Sanity checking for values equal to zero or less than would be
|
|
* practical for this device (BSP Kernel assumes 500mAH or less) for
|
|
* practicality purposes. Also check if the value is too large and
|
|
* correct it.
|
|
*/
|
|
if ((charger->fcc_mah < 500) ||
|
|
((charger->fcc_mah * 1000) > charger->bat_charge_full_design_uah)) {
|
|
dev_info(charger->dev,
|
|
"Invalid NVRAM max charge, setting to %u uAH\n",
|
|
charger->bat_charge_full_design_uah);
|
|
charger->fcc_mah = charger->bat_charge_full_design_uah / 1000;
|
|
}
|
|
|
|
/*
|
|
* Read the nvram for state of charge. Sanity check for values greater
|
|
* than 100 (10000). If the value is off it should get corrected
|
|
* automatically when the voltage drops to the min (soc is 0) or when
|
|
* the battery is full (soc is 100).
|
|
*/
|
|
ret = regmap_bulk_read(charger->rk808->regmap,
|
|
RK817_GAS_GAUGE_BAT_R1, bulk_reg, 3);
|
|
if (ret < 0)
|
|
return ret;
|
|
charger->soc = get_unaligned_le24(bulk_reg);
|
|
if (charger->soc > 10000)
|
|
charger->soc = 10000;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
rk817_read_or_set_full_charge_on_boot(struct rk817_charger *charger,
|
|
struct power_supply_battery_info *bat_info)
|
|
{
|
|
struct rk808 *rk808 = charger->rk808;
|
|
u8 bulk_reg[4];
|
|
u32 boot_voltage, boot_charge_mah, tmp;
|
|
int ret, reg, off_time;
|
|
bool first_boot;
|
|
|
|
/*
|
|
* Check if the battery is uninitalized. If it is, the columb counter
|
|
* needs to be set up.
|
|
*/
|
|
ret = regmap_read(rk808->regmap, RK817_GAS_GAUGE_GG_STS, ®);
|
|
if (ret < 0)
|
|
return ret;
|
|
first_boot = reg & RK817_BAT_CON;
|
|
/*
|
|
* If the battery is uninitialized, use the poweron voltage and an ocv
|
|
* lookup to guess our charge. The number won't be very accurate until
|
|
* we hit either our minimum voltage (0%) or full charge (100%).
|
|
*/
|
|
if (first_boot) {
|
|
regmap_bulk_read(rk808->regmap, RK817_GAS_GAUGE_PWRON_VOL_H,
|
|
bulk_reg, 2);
|
|
tmp = get_unaligned_be16(bulk_reg);
|
|
boot_voltage = (charger->voltage_k * tmp) +
|
|
1000 * charger->voltage_b;
|
|
/*
|
|
* Since only implementation has no working thermistor, assume
|
|
* 20C for OCV lookup. If lookup fails, report error with OCV
|
|
* table.
|
|
*/
|
|
charger->soc = power_supply_batinfo_ocv2cap(bat_info,
|
|
boot_voltage,
|
|
20) * 1000;
|
|
if (charger->soc < 0)
|
|
charger->soc = 0;
|
|
|
|
/* Guess that full charge capacity is the design capacity */
|
|
charger->fcc_mah = charger->bat_charge_full_design_uah / 1000;
|
|
/*
|
|
* Set battery as "set up". BSP driver uses this value even
|
|
* though datasheet claims it's a read-only value.
|
|
*/
|
|
regmap_write_bits(rk808->regmap, RK817_GAS_GAUGE_GG_STS,
|
|
RK817_BAT_CON, 0);
|
|
/* Save nvram values */
|
|
ret = rk817_record_battery_nvram_values(charger);
|
|
if (ret < 0)
|
|
return ret;
|
|
} else {
|
|
ret = rk817_read_battery_nvram_values(charger);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
regmap_bulk_read(rk808->regmap, RK817_GAS_GAUGE_Q_PRES_H3,
|
|
bulk_reg, 4);
|
|
tmp = get_unaligned_be32(bulk_reg);
|
|
if (tmp < 0)
|
|
tmp = 0;
|
|
boot_charge_mah = ADC_TO_CHARGE_UAH(tmp,
|
|
charger->res_div) / 1000;
|
|
/*
|
|
* Check if the columb counter has been off for more than 300
|
|
* minutes as it tends to drift downward. If so, re-init soc
|
|
* with the boot voltage instead. Note the unit values for the
|
|
* OFF_CNT register appear to be in decaminutes and stops
|
|
* counting at 2550 (0xFF) minutes. BSP kernel used OCV, but
|
|
* for me occasionally that would show invalid values. Boot
|
|
* voltage is only accurate for me on first poweron (not
|
|
* reboots), but we shouldn't ever encounter an OFF_CNT more
|
|
* than 0 on a reboot anyway.
|
|
*/
|
|
regmap_read(rk808->regmap, RK817_GAS_GAUGE_OFF_CNT, &off_time);
|
|
if (off_time >= 30) {
|
|
regmap_bulk_read(rk808->regmap,
|
|
RK817_GAS_GAUGE_PWRON_VOL_H,
|
|
bulk_reg, 2);
|
|
tmp = get_unaligned_be16(bulk_reg);
|
|
boot_voltage = (charger->voltage_k * tmp) +
|
|
1000 * charger->voltage_b;
|
|
charger->soc =
|
|
power_supply_batinfo_ocv2cap(bat_info,
|
|
boot_voltage,
|
|
20) * 1000;
|
|
} else {
|
|
charger->soc = (boot_charge_mah * 1000 * 100 /
|
|
charger->fcc_mah);
|
|
}
|
|
}
|
|
|
|
regmap_bulk_read(rk808->regmap, RK817_GAS_GAUGE_PWRON_VOL_H,
|
|
bulk_reg, 2);
|
|
tmp = get_unaligned_be16(bulk_reg);
|
|
boot_voltage = (charger->voltage_k * tmp) + 1000 * charger->voltage_b;
|
|
regmap_bulk_read(rk808->regmap, RK817_GAS_GAUGE_Q_PRES_H3,
|
|
bulk_reg, 4);
|
|
tmp = get_unaligned_be32(bulk_reg);
|
|
if (tmp < 0)
|
|
tmp = 0;
|
|
boot_charge_mah = ADC_TO_CHARGE_UAH(tmp, charger->res_div) / 1000;
|
|
regmap_bulk_read(rk808->regmap, RK817_GAS_GAUGE_OCV_VOL_H,
|
|
bulk_reg, 2);
|
|
tmp = get_unaligned_be16(bulk_reg);
|
|
boot_voltage = (charger->voltage_k * tmp) + 1000 * charger->voltage_b;
|
|
|
|
/*
|
|
* Now we have our full charge capacity and soc, init the columb
|
|
* counter.
|
|
*/
|
|
boot_charge_mah = charger->soc * charger->fcc_mah / 100 / 1000;
|
|
if (boot_charge_mah > charger->fcc_mah)
|
|
boot_charge_mah = charger->fcc_mah;
|
|
tmp = CHARGE_TO_ADC(boot_charge_mah, charger->res_div);
|
|
put_unaligned_be32(tmp, bulk_reg);
|
|
ret = regmap_bulk_write(rk808->regmap, RK817_GAS_GAUGE_Q_INIT_H3,
|
|
bulk_reg, 4);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* Set QMAX value to max design capacity. */
|
|
tmp = CHARGE_TO_ADC((charger->bat_charge_full_design_uah / 1000),
|
|
charger->res_div);
|
|
put_unaligned_be32(tmp, bulk_reg);
|
|
ret = regmap_bulk_write(rk808->regmap, RK817_GAS_GAUGE_Q_MAX_H3,
|
|
bulk_reg, 4);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rk817_battery_init(struct rk817_charger *charger,
|
|
struct power_supply_battery_info *bat_info)
|
|
{
|
|
struct rk808 *rk808 = charger->rk808;
|
|
u32 tmp, max_chg_vol_mv, max_chg_cur_ma;
|
|
u8 max_chg_vol_reg, chg_term_i_reg;
|
|
int ret, chg_term_ma, max_chg_cur_reg;
|
|
u8 bulk_reg[2];
|
|
|
|
/* Get initial plug state */
|
|
regmap_read(rk808->regmap, RK817_SYS_STS, &tmp);
|
|
charger->plugged_in = (tmp & RK817_PLUG_IN_STS);
|
|
|
|
/*
|
|
* Turn on all ADC functions to measure battery, USB, and sys voltage,
|
|
* as well as batt temp. Note only tested implementation so far does
|
|
* not use a battery with a thermistor.
|
|
*/
|
|
regmap_write(rk808->regmap, RK817_GAS_GAUGE_ADC_CONFIG0, 0xfc);
|
|
|
|
/*
|
|
* Set relax mode voltage sampling interval and ADC offset calibration
|
|
* interval to 8 minutes to mirror BSP kernel. Set voltage and current
|
|
* modes to average to mirror BSP kernel.
|
|
*/
|
|
regmap_write(rk808->regmap, RK817_GAS_GAUGE_GG_CON, 0x04);
|
|
|
|
/* Calibrate voltage like the BSP does here. */
|
|
rk817_bat_calib_vol(charger);
|
|
|
|
/* Write relax threshold, derived from sleep enter current. */
|
|
tmp = CURRENT_TO_ADC(charger->sleep_enter_current_ua,
|
|
charger->res_div);
|
|
put_unaligned_be16(tmp, bulk_reg);
|
|
regmap_bulk_write(rk808->regmap, RK817_GAS_GAUGE_RELAX_THRE_H,
|
|
bulk_reg, 2);
|
|
|
|
/* Write sleep sample current, derived from sleep filter current. */
|
|
tmp = CURRENT_TO_ADC(charger->sleep_filter_current_ua,
|
|
charger->res_div);
|
|
put_unaligned_be16(tmp, bulk_reg);
|
|
regmap_bulk_write(rk808->regmap, RK817_GAS_GAUGE_SLEEP_CON_SAMP_CUR_H,
|
|
bulk_reg, 2);
|
|
|
|
/* Restart battery relax voltage */
|
|
regmap_write_bits(rk808->regmap, RK817_GAS_GAUGE_GG_STS,
|
|
RK817_RELAX_VOL_UPD, (0x0 << 2));
|
|
|
|
/*
|
|
* Set OCV Threshold Voltage to 127.5mV. This was hard coded like this
|
|
* in the BSP.
|
|
*/
|
|
regmap_write(rk808->regmap, RK817_GAS_GAUGE_OCV_THRE_VOL, 0xff);
|
|
|
|
/*
|
|
* Set maximum charging voltage to battery max voltage. Trying to be
|
|
* incredibly safe with these value, as setting them wrong could
|
|
* overcharge the battery, which would be very bad.
|
|
*/
|
|
max_chg_vol_mv = bat_info->constant_charge_voltage_max_uv / 1000;
|
|
max_chg_cur_ma = bat_info->constant_charge_current_max_ua / 1000;
|
|
|
|
if (max_chg_vol_mv < 4100) {
|
|
return dev_err_probe(charger->dev, -EINVAL,
|
|
"invalid max charger voltage, value %u unsupported\n",
|
|
max_chg_vol_mv * 1000);
|
|
}
|
|
if (max_chg_vol_mv > 4450) {
|
|
dev_info(charger->dev,
|
|
"Setting max charge voltage to 4450000uv\n");
|
|
max_chg_vol_mv = 4450;
|
|
}
|
|
|
|
if (max_chg_cur_ma < 500) {
|
|
return dev_err_probe(charger->dev, -EINVAL,
|
|
"invalid max charger current, value %u unsupported\n",
|
|
max_chg_cur_ma * 1000);
|
|
}
|
|
if (max_chg_cur_ma > 3500)
|
|
dev_info(charger->dev,
|
|
"Setting max charge current to 3500000ua\n");
|
|
|
|
/*
|
|
* Now that the values are sanity checked, if we subtract 4100 from the
|
|
* max voltage and divide by 50, we conviently get the exact value for
|
|
* the registers, which are 4.1v, 4.15v, 4.2v, 4.25v, 4.3v, 4.35v,
|
|
* 4.4v, and 4.45v; these correspond to values 0x00 through 0x07.
|
|
*/
|
|
max_chg_vol_reg = (max_chg_vol_mv - 4100) / 50;
|
|
|
|
max_chg_cur_reg = rk817_chg_cur_to_reg(max_chg_cur_ma);
|
|
|
|
if (max_chg_vol_reg < 0 || max_chg_vol_reg > 7) {
|
|
return dev_err_probe(charger->dev, -EINVAL,
|
|
"invalid max charger voltage, value %u unsupported\n",
|
|
max_chg_vol_mv * 1000);
|
|
}
|
|
if (max_chg_cur_reg < 0 || max_chg_cur_reg > 7) {
|
|
return dev_err_probe(charger->dev, -EINVAL,
|
|
"invalid max charger current, value %u unsupported\n",
|
|
max_chg_cur_ma * 1000);
|
|
}
|
|
|
|
/*
|
|
* Write the values to the registers, and deliver an emergency warning
|
|
* in the event they are not written correctly.
|
|
*/
|
|
ret = regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_OUT,
|
|
RK817_CHRG_VOL_SEL, (max_chg_vol_reg << 4));
|
|
if (ret) {
|
|
dev_emerg(charger->dev,
|
|
"Danger, unable to set max charger voltage: %u\n",
|
|
ret);
|
|
}
|
|
|
|
ret = regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_OUT,
|
|
RK817_CHRG_CUR_SEL, max_chg_cur_reg);
|
|
if (ret) {
|
|
dev_emerg(charger->dev,
|
|
"Danger, unable to set max charger current: %u\n",
|
|
ret);
|
|
}
|
|
|
|
/* Set charge finishing mode to analog */
|
|
regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_TERM,
|
|
RK817_CHRG_TERM_ANA_DIG, (0x0 << 2));
|
|
|
|
/*
|
|
* Set charge finish current, warn if value not in range and keep
|
|
* default.
|
|
*/
|
|
chg_term_ma = bat_info->charge_term_current_ua / 1000;
|
|
if (chg_term_ma < 150 || chg_term_ma > 400) {
|
|
dev_warn(charger->dev,
|
|
"Invalid charge termination %u, keeping default\n",
|
|
chg_term_ma * 1000);
|
|
chg_term_ma = 200;
|
|
}
|
|
|
|
/*
|
|
* Values of 150ma, 200ma, 300ma, and 400ma correspond to 00, 01, 10,
|
|
* and 11.
|
|
*/
|
|
chg_term_i_reg = (chg_term_ma - 100) / 100;
|
|
regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_TERM,
|
|
RK817_CHRG_TERM_ANA_SEL, chg_term_i_reg);
|
|
|
|
ret = rk817_read_or_set_full_charge_on_boot(charger, bat_info);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/*
|
|
* Set minimum USB input voltage to 4.5v and enable USB voltage input
|
|
* limit.
|
|
*/
|
|
regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_IN,
|
|
RK817_USB_VLIM_SEL, (0x05 << 4));
|
|
regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_IN, RK817_USB_VLIM_EN,
|
|
(0x01 << 7));
|
|
|
|
/*
|
|
* Set average USB input current limit to 1.5A and enable USB current
|
|
* input limit.
|
|
*/
|
|
regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_IN,
|
|
RK817_USB_ILIM_SEL, 0x03);
|
|
regmap_write_bits(rk808->regmap, RK817_PMIC_CHRG_IN, RK817_USB_ILIM_EN,
|
|
(0x01 << 3));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void rk817_charging_monitor(struct work_struct *work)
|
|
{
|
|
struct rk817_charger *charger;
|
|
|
|
charger = container_of(work, struct rk817_charger, work.work);
|
|
|
|
rk817_read_props(charger);
|
|
|
|
/* Run every 8 seconds like the BSP driver did. */
|
|
queue_delayed_work(system_wq, &charger->work, msecs_to_jiffies(8000));
|
|
}
|
|
|
|
static int rk817_charger_probe(struct platform_device *pdev)
|
|
{
|
|
struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
|
|
struct rk817_charger *charger;
|
|
struct device_node *node;
|
|
struct power_supply_battery_info *bat_info;
|
|
struct device *dev = &pdev->dev;
|
|
struct power_supply_config pscfg = {};
|
|
int plugin_irq, plugout_irq;
|
|
int of_value;
|
|
int ret;
|
|
|
|
node = of_get_child_by_name(dev->parent->of_node, "charger");
|
|
if (!node)
|
|
return -ENODEV;
|
|
|
|
charger = devm_kzalloc(&pdev->dev, sizeof(*charger), GFP_KERNEL);
|
|
if (!charger) {
|
|
of_node_put(node);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
charger->rk808 = rk808;
|
|
|
|
charger->dev = &pdev->dev;
|
|
platform_set_drvdata(pdev, charger);
|
|
|
|
rk817_bat_calib_vol(charger);
|
|
|
|
pscfg.drv_data = charger;
|
|
pscfg.of_node = node;
|
|
|
|
/*
|
|
* Get sample resistor value. Note only values of 10000 or 20000
|
|
* microohms are allowed. Schematic for my test implementation (an
|
|
* Odroid Go Advance) shows a 10 milliohm resistor for reference.
|
|
*/
|
|
ret = of_property_read_u32(node, "rockchip,resistor-sense-micro-ohms",
|
|
&of_value);
|
|
if (ret < 0) {
|
|
return dev_err_probe(dev, ret,
|
|
"Error reading sample resistor value\n");
|
|
}
|
|
/*
|
|
* Store as a 1 or a 2, since all we really use the value for is as a
|
|
* divisor in some calculations.
|
|
*/
|
|
charger->res_div = (of_value == 20000) ? 2 : 1;
|
|
|
|
/*
|
|
* Get sleep enter current value. Not sure what this value is for
|
|
* other than to help calibrate the relax threshold.
|
|
*/
|
|
ret = of_property_read_u32(node,
|
|
"rockchip,sleep-enter-current-microamp",
|
|
&of_value);
|
|
if (ret < 0) {
|
|
return dev_err_probe(dev, ret,
|
|
"Error reading sleep enter cur value\n");
|
|
}
|
|
charger->sleep_enter_current_ua = of_value;
|
|
|
|
/* Get sleep filter current value */
|
|
ret = of_property_read_u32(node,
|
|
"rockchip,sleep-filter-current-microamp",
|
|
&of_value);
|
|
if (ret < 0) {
|
|
return dev_err_probe(dev, ret,
|
|
"Error reading sleep filter cur value\n");
|
|
}
|
|
|
|
charger->sleep_filter_current_ua = of_value;
|
|
|
|
charger->bat_ps = devm_power_supply_register(&pdev->dev,
|
|
&rk817_bat_desc, &pscfg);
|
|
if (IS_ERR(charger->bat_ps))
|
|
return dev_err_probe(dev, -EINVAL,
|
|
"Battery failed to probe\n");
|
|
|
|
charger->chg_ps = devm_power_supply_register(&pdev->dev,
|
|
&rk817_chg_desc, &pscfg);
|
|
if (IS_ERR(charger->chg_ps))
|
|
return dev_err_probe(dev, -EINVAL,
|
|
"Charger failed to probe\n");
|
|
|
|
ret = power_supply_get_battery_info(charger->bat_ps,
|
|
&bat_info);
|
|
if (ret) {
|
|
return dev_err_probe(dev, ret,
|
|
"Unable to get battery info: %d\n", ret);
|
|
}
|
|
|
|
if ((bat_info->charge_full_design_uah <= 0) ||
|
|
(bat_info->voltage_min_design_uv <= 0) ||
|
|
(bat_info->voltage_max_design_uv <= 0) ||
|
|
(bat_info->constant_charge_voltage_max_uv <= 0) ||
|
|
(bat_info->constant_charge_current_max_ua <= 0) ||
|
|
(bat_info->charge_term_current_ua <= 0)) {
|
|
return dev_err_probe(dev, -EINVAL,
|
|
"Required bat info missing or invalid\n");
|
|
}
|
|
|
|
charger->bat_charge_full_design_uah = bat_info->charge_full_design_uah;
|
|
charger->bat_voltage_min_design_uv = bat_info->voltage_min_design_uv;
|
|
charger->bat_voltage_max_design_uv = bat_info->voltage_max_design_uv;
|
|
|
|
/*
|
|
* Has to run after power_supply_get_battery_info as it depends on some
|
|
* values discovered from that routine.
|
|
*/
|
|
ret = rk817_battery_init(charger, bat_info);
|
|
if (ret)
|
|
return ret;
|
|
|
|
power_supply_put_battery_info(charger->bat_ps, bat_info);
|
|
|
|
plugin_irq = platform_get_irq(pdev, 0);
|
|
if (plugin_irq < 0)
|
|
return plugin_irq;
|
|
|
|
plugout_irq = platform_get_irq(pdev, 1);
|
|
if (plugout_irq < 0)
|
|
return plugout_irq;
|
|
|
|
ret = devm_request_threaded_irq(charger->dev, plugin_irq, NULL,
|
|
rk817_plug_in_isr,
|
|
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
|
|
"rk817_plug_in", charger);
|
|
if (ret) {
|
|
return dev_err_probe(&pdev->dev, ret,
|
|
"plug_in_irq request failed!\n");
|
|
}
|
|
|
|
ret = devm_request_threaded_irq(charger->dev, plugout_irq, NULL,
|
|
rk817_plug_out_isr,
|
|
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
|
|
"rk817_plug_out", charger);
|
|
if (ret) {
|
|
return dev_err_probe(&pdev->dev, ret,
|
|
"plug_out_irq request failed!\n");
|
|
}
|
|
|
|
ret = devm_delayed_work_autocancel(&pdev->dev, &charger->work,
|
|
rk817_charging_monitor);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Force the first update immediately. */
|
|
mod_delayed_work(system_wq, &charger->work, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static struct platform_driver rk817_charger_driver = {
|
|
.probe = rk817_charger_probe,
|
|
.driver = {
|
|
.name = "rk817-charger",
|
|
},
|
|
};
|
|
module_platform_driver(rk817_charger_driver);
|
|
|
|
MODULE_DESCRIPTION("Battery power supply driver for RK817 PMIC");
|
|
MODULE_AUTHOR("Maya Matuszczyk <maccraft123mc@gmail.com>");
|
|
MODULE_AUTHOR("Chris Morgan <macromorgan@hotmail.com>");
|
|
MODULE_LICENSE("GPL");
|