+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Battery and Power Management code for the Sharp SL-6000x
- *
- * Copyright (c) 2005 Dirk Opfer
- * Copyright (c) 2008 Dmitry Baryshkov
- */
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/power_supply.h>
-#include <linux/wm97xx.h>
-#include <linux/delay.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-#include <linux/gpio/consumer.h>
-
-#include <asm/mach-types.h>
-
-static DEFINE_MUTEX(bat_lock); /* protects gpio pins */
-static struct work_struct bat_work;
-
-struct tosa_bat {
- int status;
- struct power_supply *psy;
- int full_chrg;
-
- struct mutex work_lock; /* protects data */
-
- bool (*is_present)(struct tosa_bat *bat);
- struct gpio_desc *gpiod_full;
- struct gpio_desc *gpiod_charge_off;
-
- int technology;
-
- struct gpio_desc *gpiod_bat;
- int adc_bat;
- int adc_bat_divider;
- int bat_max;
- int bat_min;
-
- struct gpio_desc *gpiod_temp;
- int adc_temp;
- int adc_temp_divider;
-};
-
-static struct gpio_desc *jacket_detect;
-static struct tosa_bat tosa_bat_main;
-static struct tosa_bat tosa_bat_jacket;
-
-static unsigned long tosa_read_bat(struct tosa_bat *bat)
-{
- unsigned long value = 0;
-
- if (!bat->gpiod_bat || bat->adc_bat < 0)
- return 0;
-
- mutex_lock(&bat_lock);
- gpiod_set_value(bat->gpiod_bat, 1);
- msleep(5);
- value = wm97xx_read_aux_adc(dev_get_drvdata(bat->psy->dev.parent),
- bat->adc_bat);
- gpiod_set_value(bat->gpiod_bat, 0);
- mutex_unlock(&bat_lock);
-
- value = value * 1000000 / bat->adc_bat_divider;
-
- return value;
-}
-
-static unsigned long tosa_read_temp(struct tosa_bat *bat)
-{
- unsigned long value = 0;
-
- if (!bat->gpiod_temp || bat->adc_temp < 0)
- return 0;
-
- mutex_lock(&bat_lock);
- gpiod_set_value(bat->gpiod_temp, 1);
- msleep(5);
- value = wm97xx_read_aux_adc(dev_get_drvdata(bat->psy->dev.parent),
- bat->adc_temp);
- gpiod_set_value(bat->gpiod_temp, 0);
- mutex_unlock(&bat_lock);
-
- value = value * 10000 / bat->adc_temp_divider;
-
- return value;
-}
-
-static int tosa_bat_get_property(struct power_supply *psy,
- enum power_supply_property psp,
- union power_supply_propval *val)
-{
- int ret = 0;
- struct tosa_bat *bat = power_supply_get_drvdata(psy);
-
- if (bat->is_present && !bat->is_present(bat)
- && psp != POWER_SUPPLY_PROP_PRESENT) {
- return -ENODEV;
- }
-
- switch (psp) {
- case POWER_SUPPLY_PROP_STATUS:
- val->intval = bat->status;
- break;
- case POWER_SUPPLY_PROP_TECHNOLOGY:
- val->intval = bat->technology;
- break;
- case POWER_SUPPLY_PROP_VOLTAGE_NOW:
- val->intval = tosa_read_bat(bat);
- break;
- case POWER_SUPPLY_PROP_VOLTAGE_MAX:
- if (bat->full_chrg == -1)
- val->intval = bat->bat_max;
- else
- val->intval = bat->full_chrg;
- break;
- case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
- val->intval = bat->bat_max;
- break;
- case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
- val->intval = bat->bat_min;
- break;
- case POWER_SUPPLY_PROP_TEMP:
- val->intval = tosa_read_temp(bat);
- break;
- case POWER_SUPPLY_PROP_PRESENT:
- val->intval = bat->is_present ? bat->is_present(bat) : 1;
- break;
- default:
- ret = -EINVAL;
- break;
- }
- return ret;
-}
-
-static bool tosa_jacket_bat_is_present(struct tosa_bat *bat)
-{
- return gpiod_get_value(jacket_detect) == 0;
-}
-
-static void tosa_bat_external_power_changed(struct power_supply *psy)
-{
- schedule_work(&bat_work);
-}
-
-static irqreturn_t tosa_bat_gpio_isr(int irq, void *data)
-{
- pr_info("tosa_bat_gpio irq\n");
- schedule_work(&bat_work);
- return IRQ_HANDLED;
-}
-
-static void tosa_bat_update(struct tosa_bat *bat)
-{
- int old;
- struct power_supply *psy = bat->psy;
-
- mutex_lock(&bat->work_lock);
-
- old = bat->status;
-
- if (bat->is_present && !bat->is_present(bat)) {
- printk(KERN_NOTICE "%s not present\n", psy->desc->name);
- bat->status = POWER_SUPPLY_STATUS_UNKNOWN;
- bat->full_chrg = -1;
- } else if (power_supply_am_i_supplied(psy)) {
- if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING) {
- gpiod_set_value(bat->gpiod_charge_off, 0);
- mdelay(15);
- }
-
- if (gpiod_get_value(bat->gpiod_full)) {
- if (old == POWER_SUPPLY_STATUS_CHARGING ||
- bat->full_chrg == -1)
- bat->full_chrg = tosa_read_bat(bat);
-
- gpiod_set_value(bat->gpiod_charge_off, 1);
- bat->status = POWER_SUPPLY_STATUS_FULL;
- } else {
- gpiod_set_value(bat->gpiod_charge_off, 0);
- bat->status = POWER_SUPPLY_STATUS_CHARGING;
- }
- } else {
- gpiod_set_value(bat->gpiod_charge_off, 1);
- bat->status = POWER_SUPPLY_STATUS_DISCHARGING;
- }
-
- if (old != bat->status)
- power_supply_changed(psy);
-
- mutex_unlock(&bat->work_lock);
-}
-
-static void tosa_bat_work(struct work_struct *work)
-{
- tosa_bat_update(&tosa_bat_main);
- tosa_bat_update(&tosa_bat_jacket);
-}
-
-
-static enum power_supply_property tosa_bat_main_props[] = {
- POWER_SUPPLY_PROP_STATUS,
- POWER_SUPPLY_PROP_TECHNOLOGY,
- POWER_SUPPLY_PROP_VOLTAGE_NOW,
- POWER_SUPPLY_PROP_VOLTAGE_MAX,
- POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
- POWER_SUPPLY_PROP_TEMP,
- POWER_SUPPLY_PROP_PRESENT,
-};
-
-static enum power_supply_property tosa_bat_bu_props[] = {
- POWER_SUPPLY_PROP_STATUS,
- POWER_SUPPLY_PROP_TECHNOLOGY,
- POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
- POWER_SUPPLY_PROP_VOLTAGE_NOW,
- POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
- POWER_SUPPLY_PROP_PRESENT,
-};
-
-static const struct power_supply_desc tosa_bat_main_desc = {
- .name = "main-battery",
- .type = POWER_SUPPLY_TYPE_BATTERY,
- .properties = tosa_bat_main_props,
- .num_properties = ARRAY_SIZE(tosa_bat_main_props),
- .get_property = tosa_bat_get_property,
- .external_power_changed = tosa_bat_external_power_changed,
- .use_for_apm = 1,
-};
-
-static const struct power_supply_desc tosa_bat_jacket_desc = {
- .name = "jacket-battery",
- .type = POWER_SUPPLY_TYPE_BATTERY,
- .properties = tosa_bat_main_props,
- .num_properties = ARRAY_SIZE(tosa_bat_main_props),
- .get_property = tosa_bat_get_property,
- .external_power_changed = tosa_bat_external_power_changed,
-};
-
-static const struct power_supply_desc tosa_bat_bu_desc = {
- .name = "backup-battery",
- .type = POWER_SUPPLY_TYPE_BATTERY,
- .properties = tosa_bat_bu_props,
- .num_properties = ARRAY_SIZE(tosa_bat_bu_props),
- .get_property = tosa_bat_get_property,
- .external_power_changed = tosa_bat_external_power_changed,
-};
-
-static struct tosa_bat tosa_bat_main = {
- .status = POWER_SUPPLY_STATUS_DISCHARGING,
- .full_chrg = -1,
- .psy = NULL,
-
- .gpiod_full = NULL,
- .gpiod_charge_off = NULL,
-
- .technology = POWER_SUPPLY_TECHNOLOGY_LIPO,
-
- .gpiod_bat = NULL,
- .adc_bat = WM97XX_AUX_ID3,
- .adc_bat_divider = 414,
- .bat_max = 4310000,
- .bat_min = 1551 * 1000000 / 414,
-
- .gpiod_temp = NULL,
- .adc_temp = WM97XX_AUX_ID2,
- .adc_temp_divider = 10000,
-};
-
-static struct tosa_bat tosa_bat_jacket = {
- .status = POWER_SUPPLY_STATUS_DISCHARGING,
- .full_chrg = -1,
- .psy = NULL,
-
- .is_present = tosa_jacket_bat_is_present,
- .gpiod_full = NULL,
- .gpiod_charge_off = NULL,
-
- .technology = POWER_SUPPLY_TECHNOLOGY_LIPO,
-
- .gpiod_bat = NULL,
- .adc_bat = WM97XX_AUX_ID3,
- .adc_bat_divider = 414,
- .bat_max = 4310000,
- .bat_min = 1551 * 1000000 / 414,
-
- .gpiod_temp = NULL,
- .adc_temp = WM97XX_AUX_ID2,
- .adc_temp_divider = 10000,
-};
-
-static struct tosa_bat tosa_bat_bu = {
- .status = POWER_SUPPLY_STATUS_UNKNOWN,
- .full_chrg = -1,
- .psy = NULL,
-
- .gpiod_full = NULL,
- .gpiod_charge_off = NULL,
-
- .technology = POWER_SUPPLY_TECHNOLOGY_LiMn,
-
- .gpiod_bat = NULL,
- .adc_bat = WM97XX_AUX_ID4,
- .adc_bat_divider = 1266,
-
- .gpiod_temp = NULL,
- .adc_temp = -1,
- .adc_temp_divider = -1,
-};
-
-#ifdef CONFIG_PM
-static int tosa_bat_suspend(struct platform_device *dev, pm_message_t state)
-{
- /* flush all pending status updates */
- flush_work(&bat_work);
- return 0;
-}
-
-static int tosa_bat_resume(struct platform_device *dev)
-{
- /* things may have changed while we were away */
- schedule_work(&bat_work);
- return 0;
-}
-#else
-#define tosa_bat_suspend NULL
-#define tosa_bat_resume NULL
-#endif
-
-static int tosa_bat_probe(struct platform_device *pdev)
-{
- int ret;
- struct power_supply_config main_psy_cfg = {},
- jacket_psy_cfg = {},
- bu_psy_cfg = {};
- struct device *dev = &pdev->dev;
- struct gpio_desc *dummy;
-
- if (!machine_is_tosa())
- return -ENODEV;
-
- /* Main charging control GPIOs */
- tosa_bat_main.gpiod_charge_off = devm_gpiod_get(dev, "main charge off", GPIOD_OUT_HIGH);
- if (IS_ERR(tosa_bat_main.gpiod_charge_off))
- return dev_err_probe(dev, PTR_ERR(tosa_bat_main.gpiod_charge_off),
- "no main charger GPIO\n");
- tosa_bat_jacket.gpiod_charge_off = devm_gpiod_get(dev, "jacket charge off", GPIOD_OUT_HIGH);
- if (IS_ERR(tosa_bat_jacket.gpiod_charge_off))
- return dev_err_probe(dev, PTR_ERR(tosa_bat_jacket.gpiod_charge_off),
- "no jacket charger GPIO\n");
-
- /* Per-battery output check (routes battery voltage to ADC) */
- tosa_bat_main.gpiod_bat = devm_gpiod_get(dev, "main battery", GPIOD_OUT_LOW);
- if (IS_ERR(tosa_bat_main.gpiod_bat))
- return dev_err_probe(dev, PTR_ERR(tosa_bat_main.gpiod_bat),
- "no main battery GPIO\n");
- tosa_bat_jacket.gpiod_bat = devm_gpiod_get(dev, "jacket battery", GPIOD_OUT_LOW);
- if (IS_ERR(tosa_bat_jacket.gpiod_bat))
- return dev_err_probe(dev, PTR_ERR(tosa_bat_jacket.gpiod_bat),
- "no jacket battery GPIO\n");
- tosa_bat_bu.gpiod_bat = devm_gpiod_get(dev, "backup battery", GPIOD_OUT_LOW);
- if (IS_ERR(tosa_bat_bu.gpiod_bat))
- return dev_err_probe(dev, PTR_ERR(tosa_bat_bu.gpiod_bat),
- "no backup battery GPIO\n");
-
- /* Battery full detect GPIOs (using PXA SoC GPIOs) */
- tosa_bat_main.gpiod_full = devm_gpiod_get(dev, "main battery full", GPIOD_IN);
- if (IS_ERR(tosa_bat_main.gpiod_full))
- return dev_err_probe(dev, PTR_ERR(tosa_bat_main.gpiod_full),
- "no main battery full GPIO\n");
- tosa_bat_jacket.gpiod_full = devm_gpiod_get(dev, "jacket battery full", GPIOD_IN);
- if (IS_ERR(tosa_bat_jacket.gpiod_full))
- return dev_err_probe(dev, PTR_ERR(tosa_bat_jacket.gpiod_full),
- "no jacket battery full GPIO\n");
-
- /* Battery temperature GPIOs (routes thermistor voltage to ADC) */
- tosa_bat_main.gpiod_temp = devm_gpiod_get(dev, "main battery temp", GPIOD_OUT_LOW);
- if (IS_ERR(tosa_bat_main.gpiod_temp))
- return dev_err_probe(dev, PTR_ERR(tosa_bat_main.gpiod_temp),
- "no main battery temp GPIO\n");
- tosa_bat_jacket.gpiod_temp = devm_gpiod_get(dev, "jacket battery temp", GPIOD_OUT_LOW);
- if (IS_ERR(tosa_bat_jacket.gpiod_temp))
- return dev_err_probe(dev, PTR_ERR(tosa_bat_jacket.gpiod_temp),
- "no jacket battery temp GPIO\n");
-
- /* Jacket detect GPIO */
- jacket_detect = devm_gpiod_get(dev, "jacket detect", GPIOD_IN);
- if (IS_ERR(jacket_detect))
- return dev_err_probe(dev, PTR_ERR(jacket_detect),
- "no jacket detect GPIO\n");
-
- /* Battery low indication GPIOs (not used, we just request them) */
- dummy = devm_gpiod_get(dev, "main battery low", GPIOD_IN);
- if (IS_ERR(dummy))
- return dev_err_probe(dev, PTR_ERR(dummy),
- "no main battery low GPIO\n");
- dummy = devm_gpiod_get(dev, "jacket battery low", GPIOD_IN);
- if (IS_ERR(dummy))
- return dev_err_probe(dev, PTR_ERR(dummy),
- "no jacket battery low GPIO\n");
-
- /* Battery switch GPIO (not used just requested) */
- dummy = devm_gpiod_get(dev, "battery switch", GPIOD_OUT_LOW);
- if (IS_ERR(dummy))
- return dev_err_probe(dev, PTR_ERR(dummy),
- "no battery switch GPIO\n");
-
- mutex_init(&tosa_bat_main.work_lock);
- mutex_init(&tosa_bat_jacket.work_lock);
-
- INIT_WORK(&bat_work, tosa_bat_work);
-
- main_psy_cfg.drv_data = &tosa_bat_main;
- tosa_bat_main.psy = power_supply_register(dev,
- &tosa_bat_main_desc,
- &main_psy_cfg);
- if (IS_ERR(tosa_bat_main.psy)) {
- ret = PTR_ERR(tosa_bat_main.psy);
- goto err_psy_reg_main;
- }
-
- jacket_psy_cfg.drv_data = &tosa_bat_jacket;
- tosa_bat_jacket.psy = power_supply_register(dev,
- &tosa_bat_jacket_desc,
- &jacket_psy_cfg);
- if (IS_ERR(tosa_bat_jacket.psy)) {
- ret = PTR_ERR(tosa_bat_jacket.psy);
- goto err_psy_reg_jacket;
- }
-
- bu_psy_cfg.drv_data = &tosa_bat_bu;
- tosa_bat_bu.psy = power_supply_register(dev, &tosa_bat_bu_desc,
- &bu_psy_cfg);
- if (IS_ERR(tosa_bat_bu.psy)) {
- ret = PTR_ERR(tosa_bat_bu.psy);
- goto err_psy_reg_bu;
- }
-
- ret = request_irq(gpiod_to_irq(tosa_bat_main.gpiod_full),
- tosa_bat_gpio_isr,
- IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
- "main full", &tosa_bat_main);
- if (ret)
- goto err_req_main;
-
- ret = request_irq(gpiod_to_irq(tosa_bat_jacket.gpiod_full),
- tosa_bat_gpio_isr,
- IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
- "jacket full", &tosa_bat_jacket);
- if (ret)
- goto err_req_jacket;
-
- ret = request_irq(gpiod_to_irq(jacket_detect),
- tosa_bat_gpio_isr,
- IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
- "jacket detect", &tosa_bat_jacket);
- if (!ret) {
- schedule_work(&bat_work);
- return 0;
- }
-
- free_irq(gpiod_to_irq(tosa_bat_jacket.gpiod_full), &tosa_bat_jacket);
-err_req_jacket:
- free_irq(gpiod_to_irq(tosa_bat_main.gpiod_full), &tosa_bat_main);
-err_req_main:
- power_supply_unregister(tosa_bat_bu.psy);
-err_psy_reg_bu:
- power_supply_unregister(tosa_bat_jacket.psy);
-err_psy_reg_jacket:
- power_supply_unregister(tosa_bat_main.psy);
-err_psy_reg_main:
-
- /* see comment in tosa_bat_remove */
- cancel_work_sync(&bat_work);
-
- return ret;
-}
-
-static int tosa_bat_remove(struct platform_device *dev)
-{
- free_irq(gpiod_to_irq(jacket_detect), &tosa_bat_jacket);
- free_irq(gpiod_to_irq(tosa_bat_jacket.gpiod_full), &tosa_bat_jacket);
- free_irq(gpiod_to_irq(tosa_bat_main.gpiod_full), &tosa_bat_main);
-
- power_supply_unregister(tosa_bat_bu.psy);
- power_supply_unregister(tosa_bat_jacket.psy);
- power_supply_unregister(tosa_bat_main.psy);
-
- /*
- * Now cancel the bat_work. We won't get any more schedules,
- * since all sources (isr and external_power_changed) are
- * unregistered now.
- */
- cancel_work_sync(&bat_work);
- return 0;
-}
-
-static struct platform_driver tosa_bat_driver = {
- .driver.name = "wm97xx-battery",
- .driver.owner = THIS_MODULE,
- .probe = tosa_bat_probe,
- .remove = tosa_bat_remove,
- .suspend = tosa_bat_suspend,
- .resume = tosa_bat_resume,
-};
-
-module_platform_driver(tosa_bat_driver);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Dmitry Baryshkov");
-MODULE_DESCRIPTION("Tosa battery driver");
-MODULE_ALIAS("platform:wm97xx-battery");
projects / platform / kernel / linux-rpi.git / commitdiff