forked from luck/tmp_suning_uos_patched
power: supply: act8945a_charger: Add max current property
Add the power supply's current max property, POWER_SUPPLY_PROP_CURRENT_MAX. Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
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369eba0986
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528e350412
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@ -13,7 +13,6 @@
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_gpio.h>
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#include <linux/of_irq.h>
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#include <linux/platform_device.h>
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#include <linux/power_supply.h>
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@ -85,6 +84,7 @@ struct act8945a_charger {
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bool init_done;
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struct gpio_desc *lbo_gpio;
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struct gpio_desc *chglev_gpio;
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};
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static int act8945a_get_charger_state(struct regmap *regmap, int *val)
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@ -265,12 +265,80 @@ static int act8945a_get_capacity_level(struct act8945a_charger *charger,
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return 0;
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}
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#define MAX_CURRENT_USB_HIGH 450000
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#define MAX_CURRENT_USB_LOW 90000
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#define MAX_CURRENT_USB_PRE 45000
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/*
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* Riset(K) = 2336 * (1V/Ichg(mA)) - 0.205
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* Riset = 2.43K
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*/
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#define MAX_CURRENT_AC_HIGH 886527
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#define MAX_CURRENT_AC_LOW 117305
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#define MAX_CURRENT_AC_HIGH_PRE 88653
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#define MAX_CURRENT_AC_LOW_PRE 11731
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static int act8945a_get_current_max(struct act8945a_charger *charger,
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struct regmap *regmap, int *val)
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{
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int ret;
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unsigned int status, state;
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unsigned int acin_state;
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int chgin_level = gpiod_get_value(charger->chglev_gpio);
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ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status);
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if (ret < 0)
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return ret;
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ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state);
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if (ret < 0)
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return ret;
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acin_state = (state & APCH_STATE_ACINSTAT) >> 1;
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state &= APCH_STATE_CSTATE;
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state >>= APCH_STATE_CSTATE_SHIFT;
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switch (state) {
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case APCH_STATE_CSTATE_PRE:
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if (acin_state) {
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if (chgin_level)
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*val = MAX_CURRENT_AC_HIGH_PRE;
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else
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*val = MAX_CURRENT_AC_LOW_PRE;
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} else {
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*val = MAX_CURRENT_USB_PRE;
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}
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break;
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case APCH_STATE_CSTATE_FAST:
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if (acin_state) {
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if (chgin_level)
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*val = MAX_CURRENT_AC_HIGH;
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else
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*val = MAX_CURRENT_AC_LOW;
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} else {
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if (chgin_level)
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*val = MAX_CURRENT_USB_HIGH;
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else
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*val = MAX_CURRENT_USB_LOW;
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}
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break;
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case APCH_STATE_CSTATE_EOC:
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case APCH_STATE_CSTATE_DISABLED:
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default:
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*val = 0;
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break;
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}
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return 0;
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}
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static enum power_supply_property act8945a_charger_props[] = {
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POWER_SUPPLY_PROP_STATUS,
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POWER_SUPPLY_PROP_CHARGE_TYPE,
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POWER_SUPPLY_PROP_TECHNOLOGY,
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POWER_SUPPLY_PROP_HEALTH,
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POWER_SUPPLY_PROP_CAPACITY_LEVEL,
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POWER_SUPPLY_PROP_CURRENT_MAX,
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POWER_SUPPLY_PROP_MODEL_NAME,
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POWER_SUPPLY_PROP_MANUFACTURER
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};
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@ -300,6 +368,10 @@ static int act8945a_charger_get_property(struct power_supply *psy,
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ret = act8945a_get_capacity_level(charger,
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regmap, &val->intval);
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break;
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case POWER_SUPPLY_PROP_CURRENT_MAX:
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ret = act8945a_get_current_max(charger,
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regmap, &val->intval);
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break;
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case POWER_SUPPLY_PROP_MODEL_NAME:
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val->strval = act8945a_charger_model;
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break;
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@ -390,13 +462,11 @@ static int act8945a_charger_config(struct device *dev,
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struct act8945a_charger *charger)
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{
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struct device_node *np = dev->of_node;
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enum of_gpio_flags flags;
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struct regmap *regmap = charger->regmap;
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u32 total_time_out;
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u32 pre_time_out;
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u32 input_voltage_threshold;
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int chglev_pin;
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int err, ret;
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unsigned int tmp;
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@ -431,12 +501,13 @@ static int act8945a_charger_config(struct device *dev,
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if (ret)
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dev_info(dev, "failed to request gpio \"lbo\" IRQ\n");
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chglev_pin = of_get_named_gpio_flags(np,
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"active-semi,chglev-gpios", 0, &flags);
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if (gpio_is_valid(chglev_pin)) {
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gpio_set_value(chglev_pin,
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((flags == OF_GPIO_ACTIVE_LOW) ? 0 : 1));
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charger->chglev_gpio = devm_gpiod_get_optional(dev,
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"active-semi,chglev",
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GPIOD_IN);
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if (IS_ERR(charger->chglev_gpio)) {
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err = PTR_ERR(charger->chglev_gpio);
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dev_err(dev, "unable to claim gpio \"chglev\": %d\n", err);
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return err;
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}
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if (of_property_read_u32(np,
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