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怎样去修改不带电池开机的RK817的PMU电路

问答对人有帮助，内容完整，我也想知道答案 0 带电池开机的RK817的PMU电路是怎样的？怎样去修改不带电池开机的RK817的PMU电路？ 0
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答案对人有帮助，有参考价值 0 1、硬件设计的原理带电池开机的RK817的PMU电路图：不带电池的开机的RK817的PMU电路图：从RK817芯片手册得知道：其中系统启动后可以使用以下命令查看系统配置： echo r 0xde > /sys/rk8xx/rk8xx_dbg 使用以下命令查看RK817的充电状态： echo r 0xe4 > /sys/rk8xx/rk8xx_dbg echo r 0xe5 > /sys/rk8xx/rk8xx_dbg echo r 0xe6 > /sys/rk8xx/rk8xx_dbg 所以从以上得知，当板子硬件设计不带电池的时候，需要修改RK817 IC的输入充电电流的限制。正常带电池启动时，RK817的充电电流限制在450mA。而不带电池启动时，RK817的充电电流需要放开限制，调整到最大3A,同时需要修改u-boot和内核对不带电池不启动系统的限制。 2、u-boot对不带电池限制启动的修改 u-bootdriverspowercharge_animation.c static int charge_animation_show(struct udevice dev) { .............................. if (!fuel_gauge_bat_is_exist(fg)) { //这里将检查电池是否存在 printf("Exit charge: battery is not existn"); return 0; } / Extrem low power charge / ret = charge_extrem_low_power(dev); if (ret < 0) { printf("extrem low power charge failed, ret=%dn", ret); return ret; } ............................ } ------------> 方法一： u-boot/drivers/power/fuel_gauge/fuel_gauge_uclass.c int fuel_gauge_bat_is_exist(struct udevice dev) { const struct dm_fuel_gauge_ops ops = dev_get_driver_ops(dev); if (!ops \|\| !ops->bat_is_exist){ //bat is no exit ,so return 0 printf("bat is no exist,return 0n"); //return -ENOSYS; //修改这里直接返回0，因为ops->bat_is_exist时，因为fg_rk817.c中的接口为空，所以这里会正常进入 return 0; } printf("ops->bat_is_exist,call rk817_bat_bat_is_exist()n"); return ops->bat_is_exist(dev); } 方法二：修改：u-bootdriverspowerfuel_gaugefg_rk816.c 添加bat_is_exist()接口函数，如下： @@ -132,6 +132,7 @@ static int dbg_enable = 0; #define CUR_ADC_K2 0x00ae #define CUR_ADC_K1 0x00af #define CUR_ADC_K0 0x00b0 +#define PMIC_CHRG_STS 0x00eb #define BAT_DISCHRG 0x00ec #define BAT_CON BIT(4) @@ -1217,7 +1218,26 @@ static int rk817_bat_update_get_soc(struct udevice dev) return VIRTUAL_POWER_SOC; } +static int rk817_is_bat_exist(struct rk817_battery_device battery) +{ + struct rk8xx_priv rk8xx = dev_get_priv(battery->dev->parent); + + if (rk8xx->variant == RK817_ID) + return (rk817_bat_read(battery, PMIC_CHRG_STS) & 0x80) ? 1 : 0; + + return 1; +} + +static int rk817_bat_bat_is_exit(struct udevice dev) +{ + struct rk817_battery_device battery = dev_get_priv(dev); + + return rk817_is_bat_exist(battery); +} + + static struct dm_fuel_gauge_ops fg_ops = { + .bat_is_exist = rk817_bat_bat_is_exit, .get_soc = rk817_bat_update_get_soc, .get_voltage = rk817_bat_update_get_voltage, .get_current = rk817_bat_update_get_current, @@ -1274,6 +1294,10 @@ static int rk817_fg_ofdata_to_platdata(struct udevice dev) return -EINVAL; } + battery->virtual_power = dev_read_u32_default(dev, "virtual_power", 0); + if (!rk817_is_bat_exist(battery)) + battery->virtual_power = 1; + if (rk8xx->variant == RK809_ID) { battery->bat_res_up = dev_read_u32_default(dev, "bat_res_up", -1); if (battery->bat_res_up < 0) { -- 3、内核修改不带电池不允许启动 kernelarcharm64bootdtsrockchiprk3566-rk817-tablet.dts battery { compatible = "rk817,battery"; ocv_table = <3400 3513 3578 3687 3734 3752 3763 3766 3771 3784 3804 3836 3885 3925 3962 4005 4063 4114 4169 4227 4303>; design_capacity = <5000>; design_qmax = <5500>; bat_res = <100>; sleep_enter_current = <150>; sleep_exit_current = <180>; sleep_filter_current = <100>; power_off_thresd = <3350>; zero_algorithm_vol = <3850>; max_soc_offset = <60>; monitor_sec = <5>; sample_res = <10>; //virtual_power = <0>; virtual_power = <1>; //bat_is_noexist }; charger { compatible = "rk817,charger"; min_input_voltage = <4500>; max_input_current = <1500>; max_chrg_current = <2000>; max_chrg_voltage = <4300>; chrg_term_mode = <0>; chrg_finish_cur = <300>; virtual_power = <0>;//1 dc_det_adc = <0>; extcon = <&u*2phy0>; }; 其中各个参数请参考代码中的/RKDocs/common/PMIC/Rockchip_Developer_Guide_RK817_RK809_Fuel_Gauge_CN&EN.pdf 【virtual_power 】测试模式。设置该值为 1，无论有没有接充电器都会上报正在充电状态。其中只需要将batter选项中的virtual_power 设置成1即可，而charge中的virtual_power不需要设置成1 4、修改RK817充电输入电流的限制需要将系统默认的输入电流限制从450mA修改成最大3A，这个主要解决USB线链接电脑插入拨出时系统重启的问题 4.1 u-boot部分将RK817输入充电电流从450mA修改成3A u-bootdriverspowerfuel_gaugefg_rk817.c //主要修改充电电流输入的限制，如下： static void rk817_bat_charger_setting(struct rk817_battery_device battery, int charger) { static u8 old_charger = UNDEF_CHARGER; rk817_bat_set_input_voltage(battery, VLIM_4500MV); /* charger changed / if (old_charger != charger) { if (charger == NO_CHARGER) {//不充电的情况，即USB线拨出的情况 DBG("NO_CHARGERn"); //rk817_bat_set_input_current(battery, ILIM_450MA); rk817_bat_set_input_current(battery, ILIM_3000MA); //从450mA修改到最大3A } else if (charger == USB_CHARGER) { //充电情况，即插入USB线链接电脑情况 DBG("USB_CHARGERn"); //rk817_bat_set_input_current(battery, ILIM_450MA); //rk817_bat_set_input_current(battery, ILIM_1500MA); rk817_bat_set_input_current(battery, ILIM_3000MA);//从1500mA修改到最大3A DBG("USB_CHARGER charger setting ILIM_3000MAn"); } else if (charger == DC_CHARGER \|\| charger == AC_CHARGER) { //充电情况 DBG("DC OR AC CHARGEn"); //rk817_bat_set_input_current(battery, ILIM_1500MA); rk817_bat_set_input_current(battery, ILIM_3000MA); //从1500mA修改到最大3A DBG("DC OR AC CHARGE charger setting ILIM_3000MAn"); } else { DBG("charger setting error %dn", charger); } old_charger = charger; } } 4.2 内核部分将RK817输入充电电流从450mA修改成3A kerneldriverspowersupplyrk817_charger.c //主要修改RK817在USB线在插入和拨出时，RK817的输入充电电流的限制 static void rk817_charge_set_chrg_param(struct rk817_charger charge, enum charger_t charger) { switch (charger) { case USB_TYPE_NONE_CHARGER: //链接到电脑上的USB拨出时，RK817输入的充电电流从450mA修改到3A charge->u*_in = 0; charge->ac_in = 0; if (charge->dc_in == 0) { charge->prop_status = POWER_SUPPLY_STATUS_DISCHARGING; //rk817_charge_set_input_current(charge, INPUT_450MA); rk817_charge_set_input_current(charge, INPUT_3000MA);//不充电时的RK817输入充电电流 } //rk817_charge_set_input_current(charge, INPUT_3000MA); power_supply_changed(charge->u_psy); power_supply_changed(charge->ac_psy); DBG("rk817_charge_set_chrg_param()::USB_TYPE_NONE_CHARGERn"); break; case USB_TYPE_USB_CHARGER: //链接到电脑上的USB插入时，RK817输入的充电电流从450mA修改到3A charge->u_in = 1; charge->ac_in = 0; charge->prop_status = POWER_SUPPLY_STATUS_CHARGING; if (charge->dc_in == 0) //rk817_charge_set_input_current(charge, INPUT_450MA); rk817_charge_set_input_current(charge, INPUT_3000MA);//充电时的RK817输入充电电流 power_supply_changed(charge->u_psy); power_supply_changed(charge->ac_psy); DBG("rk817_charge_set_chrg_param()::USB_TYPE_USB_CHARGERn"); break; case USB_TYPE_AC_CHARGER: case USB_TYPE_CDP_CHARGER://链接到电脑上的USB插入或者AC电源插入时，RK817输入的充电电流从450mA修改到3A charge->ac_in = 1; charge->u_in = 0; charge->prop_status = POWER_SUPPLY_STATUS_CHARGING; if (charger == USB_TYPE_AC_CHARGER) //rk817_charge_set_input_current(charge, // charge->max_input_current); rk817_charge_set_input_current(charge, INPUT_3000MA);//充电时的RK817输入充电电流 else //rk817_charge_set_input_current(charge, // INPUT_1500MA); rk817_charge_set_input_current(charge, INPUT_3000MA);//充电时的RK817输入充电电流 power_supply_changed(charge->u_psy); power_supply_changed(charge->ac_psy); DBG("rk817_charge_set_chrg_param()::USB_TYPE_AC-DC_CHARGERn"); break; case DC_TYPE_DC_CHARGER: charge->dc_in = 1; charge->prop_status = POWER_SUPPLY_STATUS_CHARGING; //rk817_charge_set_input_current(charge, // charge->max_input_current); rk817_charge_set_input_current(charge, INPUT_3000MA);//充电时的RK817输入充电电流 power_supply_changed(charge->u_psy); power_supply_changed(charge->ac_psy); DBG("rk817_charge_set_chrg_param()::DC_TYPE_DC_CHARGERn"); break; case DC_TYPE_NONE_CHARGER: charge->dc_in = 0; if (!rk817_charge_get_plug_in_status(charge)) { charge->ac_in = 0; charge->u_in = 0; charge->prop_status = POWER_SUPPLY_STATUS_DISCHARGING; //rk817_charge_set_input_current(charge, INPUT_450MA); rk817_charge_set_input_current(charge, INPUT_3000MA);//不充电时的RK817输入充电电流 } else if (charge->u_in) { //rk817_charge_set_input_current(charge, INPUT_450MA); rk817_charge_set_input_current(charge, INPUT_3000MA);//不充电时的RK817输入充电电流 charge->prop_status = POWER_SUPPLY_STATUS_CHARGING; } power_supply_changed(charge->u*_psy); power_supply_changed(charge->ac_psy); DBG("rk817_charge_set_chrg_param()::DC_TYPE_NONE_CHARGERn"); break; default: charge->prop_status = POWER_SUPPLY_STATUS_DISCHARGING; //rk817_charge_set_input_current(charge, INPUT_450MA); rk817_charge_set_input_current(charge, INPUT_3000MA);//不充电时的RK817输入充电电流 DBG("rk817_charge_set_chrg_param()::defaultn"); break; } if (rk817_charge_online(charge) && rk817_charge_get_dsoc(charge) == 100) charge->prop_status = POWER_SUPPLY_STATUS_FULL; } 修改完成后经过测试系统正常启动，USB口的adb和host都正常。

2022-3-2 16:12:17 评论举报戴双宝