/*
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* (C) Copyright 2022 Rockchip Electronics Co., Ltd
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <dm.h>
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#include <dm/device.h>
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#include <dm/uclass.h>
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#include <power/fuel_gauge.h>
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#include <power/pmic.h>
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#include <power/power_delivery/power_delivery.h>
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#include <linux/usb/phy-rockchip-usb2.h>
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DECLARE_GLOBAL_DATA_PTR;
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#define BQ25890_CHARGE_CURRENT_1500MA 1500
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#define BQ25890_SDP_INPUT_CURRENT_500MA 0x45
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#define BQ25890_DCP_INPUT_CURRENT_1500MA 0x4f
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#define BQ25890_DCP_INPUT_CURRENT_2000MA 0x54
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#define BQ25890_DCP_INPUT_CURRENT_3000MA 0x5e
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#define WATCHDOG_ENSABLE (0x03 << 4)
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#define BQ25890_CHARGEOPTION0_REG 0x07
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#define BQ25890_CHARGECURREN_REG 0x04
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#define BQ25890_CHARGERSTAUS_REG 0x0B
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#define BQ25890_INPUTVOLTAGE_REG 0x0D
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#define BQ25890_INPUTCURREN_REG 0x00
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#define BQ25890_AUTO_DPDM_REG 0x02
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/*
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* Most of the val -> idx conversions can be computed, given the minimum,
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* maximum and the step between values. For the rest of conversions, we use
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* lookup tables.
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*/
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enum bq25890_table_ids {
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/* range tables */
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TBL_ICHG,
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TBL_ITERM,
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TBL_IPRECHG,
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TBL_VREG,
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TBL_BATCMP,
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TBL_VCLAMP,
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TBL_BOOSTV,
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TBL_SYSVMIN,
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TBL_VINDPM,
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TBL_IINLIM,
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/* lookup tables */
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TBL_TREG,
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TBL_BOOSTI,
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};
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struct bq25890 {
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struct udevice *dev;
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u32 ichg;
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u32 chip_id;
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struct udevice *pd;
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bool pd_online;
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};
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/* Thermal Regulation Threshold lookup table, in degrees Celsius */
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static const u32 bq25890_treg_tbl[] = { 60, 80, 100, 120 };
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#define BQ25890_TREG_TBL_SIZE ARRAY_SIZE(bq25890_treg_tbl)
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/* Boost mode current limit lookup table, in uA */
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static const u32 bq25890_boosti_tbl[] = {
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500000, 700000, 1100000, 1300000, 1600000, 1800000, 2100000, 2400000
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};
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#define BQ25890_BOOSTI_TBL_SIZE ARRAY_SIZE(bq25890_boosti_tbl)
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struct bq25890_range {
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u32 min;
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u32 max;
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u32 step;
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};
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struct bq25890_lookup {
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const u32 *tbl;
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u32 size;
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};
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static const union {
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struct bq25890_range rt;
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struct bq25890_lookup lt;
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} bq25890_tables[] = {
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/* range tables */
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[TBL_ICHG] = { .rt = {0, 5056000, 64000} }, /* uA */
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[TBL_ITERM] = { .rt = {64000, 1024000, 64000} }, /* uA */
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[TBL_VREG] = { .rt = {3840000, 4608000, 16000} }, /* uV */
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[TBL_BATCMP] = { .rt = {0, 140, 20} }, /* mOhm */
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[TBL_VCLAMP] = { .rt = {0, 224000, 32000} }, /* uV */
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[TBL_BOOSTV] = { .rt = {4550000, 5510000, 64000} }, /* uV */
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[TBL_SYSVMIN] = { .rt = {3000000, 3700000, 100000} }, /* uV */
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[TBL_VINDPM] = { .rt = {2600000, 15300000, 100000} }, /* uV */
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[TBL_IINLIM] = { .rt = {100, 3250000, 100000} }, /* uA */
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/* lookup tables */
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[TBL_TREG] = { .lt = {bq25890_treg_tbl, BQ25890_TREG_TBL_SIZE} },
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[TBL_BOOSTI] = { .lt = {bq25890_boosti_tbl, BQ25890_BOOSTI_TBL_SIZE} }
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};
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static int bq25890_read(struct bq25890 *charger, uint reg)
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{
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u16 val;
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int ret;
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ret = dm_i2c_read(charger->dev, reg, (u8 *)&val, 1);
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if (ret) {
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printf("bq25890: read %#x error, ret=%d", reg, ret);
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return ret;
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}
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return val;
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}
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static int bq25890_write(struct bq25890 *charger, uint reg, u16 val)
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{
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int ret;
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ret = dm_i2c_write(charger->dev, reg, (u8 *)&val, 1);
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if (ret) {
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printf("bq25890: write %#x error, ret=%d", reg, ret);
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return ret;
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}
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return 0;
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}
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static u8 bq25890_find_idx(u32 value, enum bq25890_table_ids id)
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{
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u8 idx;
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if (id >= TBL_TREG) {
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const u32 *tbl = bq25890_tables[id].lt.tbl;
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u32 tbl_size = bq25890_tables[id].lt.size;
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for (idx = 1; idx < tbl_size && tbl[idx] <= value; idx++)
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;
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} else {
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const struct bq25890_range *rtbl = &bq25890_tables[id].rt;
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u8 rtbl_size;
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rtbl_size = (rtbl->max - rtbl->min) / rtbl->step + 1;
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for (idx = 1;
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idx < rtbl_size && (idx * rtbl->step + rtbl->min <= value);
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idx++)
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;
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}
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return idx - 1;
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}
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static bool bq25890_charger_status(struct bq25890 *charger)
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{
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int state_of_charger;
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u16 value;
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int i = 0;
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__retry:
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value = bq25890_read(charger, BQ25890_CHARGERSTAUS_REG);
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state_of_charger = value & 0x04;
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if (!state_of_charger && charger->pd_online) {
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if (i < 3) {
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i++;
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mdelay(20);
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goto __retry;
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}
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}
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return state_of_charger;
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}
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static bool bq257xx_charger_status(struct udevice *dev)
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{
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struct bq25890 *charger = dev_get_priv(dev);
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return bq25890_charger_status(charger);
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}
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static int bq25890_charger_capability(struct udevice *dev)
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{
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return FG_CAP_CHARGER;
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}
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static int bq25890_get_usb_type(void)
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{
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#ifdef CONFIG_PHY_ROCKCHIP_INNO_USB2
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return rockchip_chg_get_type();
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#else
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return 0;
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#endif
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}
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static int bq25890_get_pd_output_val(struct bq25890 *charger,
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int *vol, int *cur)
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{
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struct power_delivery_data pd_data;
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int ret;
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if (!charger->pd)
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return -EINVAL;
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memset(&pd_data, 0, sizeof(pd_data));
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ret = power_delivery_get_data(charger->pd, &pd_data);
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if (ret)
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return ret;
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if (!pd_data.online || !pd_data.voltage || !pd_data.current)
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return -EINVAL;
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*vol = pd_data.voltage;
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*cur = pd_data.current;
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charger->pd_online = pd_data.online;
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return 0;
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}
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static void bq25890_set_auto_dpdm_detect(struct bq25890 *charger, bool enable)
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{
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u8 value;
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value = bq25890_read(charger, BQ25890_AUTO_DPDM_REG);
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value &= 0xfe;
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value |= enable;
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bq25890_write(charger, BQ25890_AUTO_DPDM_REG, value);
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}
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static void bq25890_charger_current_init(struct bq25890 *charger)
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{
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u8 charge_current = bq25890_find_idx(BQ25890_CHARGE_CURRENT_1500MA * 1000, TBL_ICHG);
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u8 sdp_inputcurrent = BQ25890_SDP_INPUT_CURRENT_500MA;
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u8 dcp_inputcurrent = BQ25890_DCP_INPUT_CURRENT_1500MA;
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int pd_inputvol, pd_inputcurrent;
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u16 vol_idx = 0, cur_idx;
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u8 temp;
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temp = bq25890_read(charger, BQ25890_CHARGEOPTION0_REG);
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temp &= (~WATCHDOG_ENSABLE);
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bq25890_write(charger, BQ25890_CHARGEOPTION0_REG, temp);
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if (!bq25890_get_pd_output_val(charger, &pd_inputvol,
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&pd_inputcurrent)) {
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printf("bq25890: pd charge %duV, %duA\n", pd_inputvol, pd_inputcurrent);
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if (pd_inputvol > 5000000) {
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vol_idx = bq25890_find_idx((pd_inputvol - 1280000 - 3200000),
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TBL_VINDPM);
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vol_idx = vol_idx << 6;
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}
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cur_idx = bq25890_find_idx(pd_inputcurrent,
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TBL_IINLIM);
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cur_idx = cur_idx << 8;
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if (pd_inputcurrent != 0) {
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bq25890_set_auto_dpdm_detect(charger, false);
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bq25890_write(charger, BQ25890_INPUTCURREN_REG,
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cur_idx);
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if (vol_idx)
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bq25890_write(charger, BQ25890_INPUTVOLTAGE_REG,
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vol_idx);
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charge_current = bq25890_find_idx(charger->ichg,
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TBL_ICHG);
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}
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} else {
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if (bq25890_get_usb_type() > 1)
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bq25890_write(charger, BQ25890_INPUTCURREN_REG,
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dcp_inputcurrent);
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else
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bq25890_write(charger, BQ25890_INPUTCURREN_REG,
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sdp_inputcurrent);
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}
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if (bq25890_charger_status(charger))
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bq25890_write(charger, BQ25890_CHARGECURREN_REG,
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charge_current);
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}
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static int bq25890_ofdata_to_platdata(struct udevice *dev)
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{
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struct bq25890 *charger = dev_get_priv(dev);
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charger->dev = dev;
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charger->ichg = dev_read_u32_default(dev, "ti,charge-current", 0);
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return 0;
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}
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static int bq25890_probe(struct udevice *dev)
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{
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struct bq25890 *charger = dev_get_priv(dev);
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int ret;
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ret = uclass_get_device(UCLASS_PD, 0, &charger->pd);
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if (ret) {
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if (ret == -ENODEV)
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printf("Can't find PD\n");
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else
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printf("Get UCLASS PD failed: %d\n", ret);
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charger->pd = NULL;
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}
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bq25890_charger_current_init(charger);
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return 0;
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}
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static const struct udevice_id charger_ids[] = {
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{ .compatible = "ti,bq25890" },
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{ .compatible = "sy,sy6970" },
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{ },
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};
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static struct dm_fuel_gauge_ops charger_ops = {
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.get_chrg_online = bq257xx_charger_status,
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.capability = bq25890_charger_capability,
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};
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U_BOOT_DRIVER(bq25890_charger) = {
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.name = "bq25890_charger",
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.id = UCLASS_FG,
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.probe = bq25890_probe,
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.of_match = charger_ids,
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.ops = &charger_ops,
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.ofdata_to_platdata = bq25890_ofdata_to_platdata,
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.priv_auto_alloc_size = sizeof(struct bq25890),
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};
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