diff options
| -rw-r--r-- | Documentation/devicetree/bindings/power/supply/cpcap-charger.txt | 9 | ||||
| -rw-r--r-- | arch/arm/boot/dts/motorola-cpcap-mapphone.dtsi | 6 | ||||
| -rw-r--r-- | drivers/power/supply/cpcap-charger.c | 132 |
3 files changed, 140 insertions, 7 deletions
diff --git a/Documentation/devicetree/bindings/power/supply/cpcap-charger.txt b/Documentation/devicetree/bindings/power/supply/cpcap-charger.txt index 80bd873c3b1d..6048f636783f 100644 --- a/Documentation/devicetree/bindings/power/supply/cpcap-charger.txt +++ b/Documentation/devicetree/bindings/power/supply/cpcap-charger.txt @@ -5,7 +5,8 @@ Required properties: - interrupts: Interrupt specifier for each name in interrupt-names - interrupt-names: Should contain the following entries: "chrg_det", "rvrs_chrg", "chrg_se1b", "se0conn", - "rvrs_mode", "chrgcurr1", "vbusvld", "battdetb" + "rvrs_mode", "chrgcurr2", "chrgcurr1", "vbusvld", + "battdetb" - io-channels: IIO ADC channel specifier for each name in io-channel-names - io-channel-names: Should contain the following entries: "battdetb", "battp", "vbus", "chg_isense", "batti" @@ -21,11 +22,13 @@ cpcap_charger: charger { compatible = "motorola,mapphone-cpcap-charger"; interrupts-extended = < &cpcap 13 0 &cpcap 12 0 &cpcap 29 0 &cpcap 28 0 - &cpcap 22 0 &cpcap 20 0 &cpcap 19 0 &cpcap 54 0 + &cpcap 22 0 &cpcap 21 0 &cpcap 20 0 &cpcap 19 0 + &cpcap 54 0 >; interrupt-names = "chrg_det", "rvrs_chrg", "chrg_se1b", "se0conn", - "rvrs_mode", "chrgcurr1", "vbusvld", "battdetb"; + "rvrs_mode", "chrgcurr2", "chrgcurr1", "vbusvld", + "battdetb"; mode-gpios = <&gpio3 29 GPIO_ACTIVE_LOW &gpio3 23 GPIO_ACTIVE_LOW>; io-channels = <&cpcap_adc 0 &cpcap_adc 1 diff --git a/arch/arm/boot/dts/motorola-cpcap-mapphone.dtsi b/arch/arm/boot/dts/motorola-cpcap-mapphone.dtsi index d1eae47b83f6..08bae935605c 100644 --- a/arch/arm/boot/dts/motorola-cpcap-mapphone.dtsi +++ b/arch/arm/boot/dts/motorola-cpcap-mapphone.dtsi @@ -43,11 +43,13 @@ compatible = "motorola,mapphone-cpcap-charger"; interrupts-extended = < &cpcap 13 0 &cpcap 12 0 &cpcap 29 0 &cpcap 28 0 - &cpcap 22 0 &cpcap 20 0 &cpcap 19 0 &cpcap 54 0 + &cpcap 22 0 &cpcap 21 0 &cpcap 20 0 &cpcap 19 0 + &cpcap 54 0 >; interrupt-names = "chrg_det", "rvrs_chrg", "chrg_se1b", "se0conn", - "rvrs_mode", "chrgcurr1", "vbusvld", "battdetb"; + "rvrs_mode", "chrgcurr2", "chrgcurr1", "vbusvld", + "battdetb"; mode-gpios = <&gpio3 29 GPIO_ACTIVE_LOW &gpio3 23 GPIO_ACTIVE_LOW>; io-channels = <&cpcap_adc 0 &cpcap_adc 1 diff --git a/drivers/power/supply/cpcap-charger.c b/drivers/power/supply/cpcap-charger.c index 74258c7fe17d..88bbab6e62f0 100644 --- a/drivers/power/supply/cpcap-charger.c +++ b/drivers/power/supply/cpcap-charger.c @@ -120,6 +120,13 @@ enum { CPCAP_CHARGER_IIO_NR, }; +enum { + CPCAP_CHARGER_DISCONNECTED, + CPCAP_CHARGER_DETECTING, + CPCAP_CHARGER_CHARGING, + CPCAP_CHARGER_DONE, +}; + struct cpcap_charger_ddata { struct device *dev; struct regmap *reg; @@ -138,6 +145,8 @@ struct cpcap_charger_ddata { atomic_t active; int status; + int state; + int voltage; }; struct cpcap_interrupt_desc { @@ -153,6 +162,7 @@ struct cpcap_charger_ints_state { bool chrg_se1b; bool rvrs_mode; + bool chrgcurr2; bool chrgcurr1; bool vbusvld; @@ -422,6 +432,7 @@ static int cpcap_charger_get_ints_state(struct cpcap_charger_ddata *ddata, s->chrg_se1b = val & BIT(13); s->rvrs_mode = val & BIT(6); + s->chrgcurr2 = val & BIT(5); s->chrgcurr1 = val & BIT(4); s->vbusvld = val & BIT(3); @@ -434,6 +445,79 @@ static int cpcap_charger_get_ints_state(struct cpcap_charger_ddata *ddata, return 0; } +static void cpcap_charger_update_state(struct cpcap_charger_ddata *ddata, + int state) +{ + const char *status; + + if (state > CPCAP_CHARGER_DONE) { + dev_warn(ddata->dev, "unknown state: %i\n", state); + + return; + } + + ddata->state = state; + + switch (state) { + case CPCAP_CHARGER_DISCONNECTED: + status = "DISCONNECTED"; + break; + case CPCAP_CHARGER_DETECTING: + status = "DETECTING"; + break; + case CPCAP_CHARGER_CHARGING: + status = "CHARGING"; + break; + case CPCAP_CHARGER_DONE: + status = "DONE"; + break; + default: + return; + } + + dev_dbg(ddata->dev, "state: %s\n", status); +} + +int cpcap_charger_voltage_to_regval(int voltage) +{ + int offset; + + switch (voltage) { + case 0 ... 4100000 - 1: + return 0; + case 4100000 ... 4200000 - 1: + offset = 1; + break; + case 4200000 ... 4300000 - 1: + offset = 0; + break; + case 4300000 ... 4380000 - 1: + offset = -1; + break; + case 4380000 ... 4440000: + offset = -2; + break; + default: + return 0; + } + + return ((voltage - 4100000) / 20000) + offset; +} + +static void cpcap_charger_disconnect(struct cpcap_charger_ddata *ddata, + int state, unsigned long delay) +{ + int error; + + error = cpcap_charger_set_state(ddata, 0, 0, 0); + if (error) + return; + + cpcap_charger_update_state(ddata, state); + power_supply_changed(ddata->usb); + schedule_delayed_work(&ddata->detect_work, delay); +} + static void cpcap_usb_detect(struct work_struct *work) { struct cpcap_charger_ddata *ddata; @@ -447,24 +531,67 @@ static void cpcap_usb_detect(struct work_struct *work) if (error) return; + /* Just init the state if a charger is connected with no chrg_det set */ + if (!s.chrg_det && s.chrgcurr1 && s.vbusvld) { + cpcap_charger_update_state(ddata, CPCAP_CHARGER_DETECTING); + + return; + } + + /* + * If battery voltage is higher than charge voltage, it may have been + * charged to 4.35V by Android. Try again in 10 minutes. + */ + if (cpcap_charger_get_charge_voltage(ddata) > ddata->voltage) { + cpcap_charger_disconnect(ddata, CPCAP_CHARGER_DETECTING, + HZ * 60 * 10); + + return; + } + + /* Throttle chrgcurr2 interrupt for charger done and retry */ + switch (ddata->state) { + case CPCAP_CHARGER_CHARGING: + if (s.chrgcurr2) + break; + if (s.chrgcurr1 && s.vbusvld) { + cpcap_charger_disconnect(ddata, CPCAP_CHARGER_DONE, + HZ * 5); + return; + } + break; + case CPCAP_CHARGER_DONE: + if (!s.chrgcurr2) + break; + cpcap_charger_disconnect(ddata, CPCAP_CHARGER_DETECTING, + HZ * 5); + return; + default: + break; + } + if (!ddata->feeding_vbus && cpcap_charger_vbus_valid(ddata) && s.chrgcurr1) { int max_current; + int vchrg; if (cpcap_charger_battery_found(ddata)) max_current = CPCAP_REG_CRM_ICHRG_1A596; else max_current = CPCAP_REG_CRM_ICHRG_0A532; + vchrg = cpcap_charger_voltage_to_regval(ddata->voltage); error = cpcap_charger_set_state(ddata, - CPCAP_REG_CRM_VCHRG_4V35, + CPCAP_REG_CRM_VCHRG(vchrg), max_current, 0); if (error) goto out_err; + cpcap_charger_update_state(ddata, CPCAP_CHARGER_CHARGING); } else { error = cpcap_charger_set_state(ddata, 0, 0, 0); if (error) goto out_err; + cpcap_charger_update_state(ddata, CPCAP_CHARGER_DISCONNECTED); } power_supply_changed(ddata->usb); @@ -524,7 +651,7 @@ static const char * const cpcap_charger_irqs[] = { "chrg_det", "rvrs_chrg", /* REG_INT1 */ - "chrg_se1b", "se0conn", "rvrs_mode", "chrgcurr1", "vbusvld", + "chrg_se1b", "se0conn", "rvrs_mode", "chrgcurr2", "chrgcurr1", "vbusvld", /* REG_INT_3 */ "battdetb", @@ -625,6 +752,7 @@ static int cpcap_charger_probe(struct platform_device *pdev) return -ENOMEM; ddata->dev = &pdev->dev; + ddata->voltage = 4200000; ddata->reg = dev_get_regmap(ddata->dev->parent, NULL); if (!ddata->reg) |