Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755330Ab2HNCdC (ORCPT ); Mon, 13 Aug 2012 22:33:02 -0400 Received: from comal.ext.ti.com ([198.47.26.152]:49398 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755159Ab2HNCdA convert rfc822-to-8bit (ORCPT ); Mon, 13 Aug 2012 22:33:00 -0400 From: "Kim, Milo" To: Anton Vorontsov CC: "sameo@linux.intel.com" , "linux-kernel@vger.kernel.org" , Jonathan Cameron Subject: [PATCH v3 2/3] power_supply: add new lp8788 charger driver Thread-Topic: [PATCH v3 2/3] power_supply: add new lp8788 charger driver Thread-Index: Ac15xRPGG7If6OQ6Qz6KCT8FRWyntg== Date: Tue, 14 Aug 2012 02:32:50 +0000 Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-cr-hashedpuzzle: BWGF DwIW Kj7q Lm9g MnPD NLhm OeRS PNKN QRhc RfLV TWGB UQba VIfM WZ6N hK5o jRsw;4;YwBiAG8AdQBhAHQAbQBhAGkAbAByAHUAQABnAG0AYQBpAGwALgBjAG8AbQA7AGoAaQBjADIAMwBAAGsAZQByAG4AZQBsAC4AbwByAGcAOwBsAGkAbgB1AHgALQBrAGUAcgBuAGUAbABAAHYAZwBlAHIALgBrAGUAcgBuAGUAbAAuAG8AcgBnADsAcwBhAG0AZQBvAEAAbABpAG4AdQB4AC4AaQBuAHQAZQBsAC4AYwBvAG0A;Sosha1_v1;7;{80A60651-D676-483E-AC4E-E509B986FCD7};bQBpAGwAbwAuAGsAaQBtAEAAdABpAC4AYwBvAG0A;Tue, 14 Aug 2012 02:32:41 GMT;WwBQAEEAVABDAEgAIAB2ADMAIAAyAC8AMwBdACAAcABvAHcAZQByAF8AcwB1AHAAcABsAHkAOgAgAGEAZABkACAAbgBlAHcAIABsAHAAOAA3ADgAOAAgAGMAaABhAHIAZwBlAHIAIABkAHIAaQB2AGUAcgA= x-cr-puzzleid: {80A60651-D676-483E-AC4E-E509B986FCD7} x-originating-ip: [157.87.185.52] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 22283 Lines: 850 Patch v3. (a) use irq domain for handling charger interrupts (b) use scaled adc value rather than raw value : replace iio_read_channel_raw() with iio_read_channel_scale() (c) clean up charger-platform-data code (d) remove goto statement in _probe() (e) name change : from lp8788_unregister_psy() to lp8788_psy_unregister() Signed-off-by: Milo(Woogyom) Kim --- drivers/power/Kconfig | 7 + drivers/power/Makefile | 1 + drivers/power/lp8788-charger.c | 785 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 793 insertions(+), 0 deletions(-) create mode 100644 drivers/power/lp8788-charger.c diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig index c1892f3..ff86469 100644 --- a/drivers/power/Kconfig +++ b/drivers/power/Kconfig @@ -255,6 +255,13 @@ config CHARGER_LP8727 help Say Y here to enable support for LP8727 Charger Driver. +config CHARGER_LP8788 + tristate "TI LP8788 charger driver" + depends on MFD_LP8788 + depends on LP8788_ADC + help + Say Y to enable support for the LP8788 linear charger. + config CHARGER_GPIO tristate "GPIO charger" depends on GPIOLIB diff --git a/drivers/power/Makefile b/drivers/power/Makefile index ee58afb..587c5f1 100644 --- a/drivers/power/Makefile +++ b/drivers/power/Makefile @@ -39,6 +39,7 @@ obj-$(CONFIG_CHARGER_ISP1704) += isp1704_charger.o obj-$(CONFIG_CHARGER_MAX8903) += max8903_charger.o obj-$(CONFIG_CHARGER_TWL4030) += twl4030_charger.o obj-$(CONFIG_CHARGER_LP8727) += lp8727_charger.o +obj-$(CONFIG_CHARGER_LP8788) += lp8788-charger.o obj-$(CONFIG_CHARGER_GPIO) += gpio-charger.o obj-$(CONFIG_CHARGER_MANAGER) += charger-manager.o obj-$(CONFIG_CHARGER_MAX8997) += max8997_charger.o diff --git a/drivers/power/lp8788-charger.c b/drivers/power/lp8788-charger.c new file mode 100644 index 0000000..a874eff --- /dev/null +++ b/drivers/power/lp8788-charger.c @@ -0,0 +1,785 @@ +/* + * TI LP8788 MFD - battery charger driver + * + * Copyright 2012 Texas Instruments + * + * Author: Milo(Woogyom) Kim + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* register address */ +#define LP8788_CHG_STATUS 0x07 +#define LP8788_CHG_IDCIN 0x13 +#define LP8788_CHG_IBATT 0x14 +#define LP8788_CHG_VTERM 0x15 +#define LP8788_CHG_EOC 0x16 + +/* mask/shift bits */ +#define LP8788_CHG_INPUT_STATE_M 0x03 /* Addr 07h */ +#define LP8788_CHG_STATE_M 0x3C +#define LP8788_CHG_STATE_S 2 +#define LP8788_NO_BATT_M BIT(6) +#define LP8788_BAD_BATT_M BIT(7) +#define LP8788_CHG_IBATT_M 0x1F /* Addr 14h */ +#define LP8788_CHG_VTERM_M 0x0F /* Addr 15h */ +#define LP8788_CHG_EOC_LEVEL_M 0x30 /* Addr 16h */ +#define LP8788_CHG_EOC_LEVEL_S 4 +#define LP8788_CHG_EOC_TIME_M 0x0E +#define LP8788_CHG_EOC_TIME_S 1 +#define LP8788_CHG_EOC_MODE_M BIT(0) + +#define CHARGER_NAME "charger" +#define BATTERY_NAME "main_batt" + +#define LP8788_CHG_START 0x11 +#define LP8788_CHG_END 0x1C + +#define BUF_SIZE 40 +#define LP8788_ISEL_MAX 23 +#define LP8788_ISEL_STEP 50 +#define LP8788_VTERM_MIN 4100 +#define LP8788_VTERM_STEP 25 +#define MAX_BATT_CAPACITY 100 +#define MAX_CHG_IRQS 11 + +enum lp8788_charging_state { + OFF, + WARM_UP, + LOW_INPUT = 0x3, + PRECHARGE, + CC, + CV, + MAINTENANCE, + BATTERY_FAULT, + SYSTEM_SUPPORT = 0xC, + HIGH_CURRENT = 0xF, + MAX_CHG_STATE, +}; + +enum lp8788_charger_adc_sel { + VBATT, + BATT_TEMP, + NUM_CHG_ADC, +}; + +enum lp8788_charger_input_state { + SYSTEM_SUPPLY = 1, + FULL_FUNCTION, +}; + +/* + * struct lp8788_chg_irq + * @which : lp8788 interrupt id + * @virq : Linux IRQ number from irq_domain + */ +struct lp8788_chg_irq { + enum lp8788_int_id which; + int virq; +}; + +/* + * struct lp8788_charger + * @lp : used for accessing the registers of mfd lp8788 device + * @charger : power supply driver for the battery charger + * @battery : power supply driver for the battery + * @charger_work : work queue for charger input interrupts + * @chan : iio channels for getting adc values + * eg) battery voltage, capacity and temperature + * @irqs : charger dedicated interrupts + * @num_irqs : total numbers of charger interrupts + * @pdata : charger platform specific data + */ +struct lp8788_charger { + struct lp8788 *lp; + struct power_supply charger; + struct power_supply battery; + struct work_struct charger_work; + struct iio_channel *chan[NUM_CHG_ADC]; + struct lp8788_chg_irq irqs[MAX_CHG_IRQS]; + int num_irqs; + struct lp8788_charger_platform_data *pdata; +}; + +static char *battery_supplied_to[] = { + BATTERY_NAME, +}; + +static enum power_supply_property lp8788_charger_prop[] = { + POWER_SUPPLY_PROP_ONLINE, +}; + +static enum power_supply_property lp8788_battery_prop[] = { + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_HEALTH, + POWER_SUPPLY_PROP_PRESENT, + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_CAPACITY, + POWER_SUPPLY_PROP_TEMP, +}; + +static bool lp8788_is_charger_detected(struct lp8788_charger *pchg) +{ + u8 data; + + lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data); + data &= LP8788_CHG_INPUT_STATE_M; + + return (data == SYSTEM_SUPPLY || data == FULL_FUNCTION); +} + +static int lp8788_charger_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct lp8788_charger *pchg = dev_get_drvdata(psy->dev->parent); + + if (psp != POWER_SUPPLY_PROP_ONLINE) + return -EINVAL; + + val->intval = lp8788_is_charger_detected(pchg); + return 0; +} + +static int lp8788_get_battery_status(struct lp8788_charger *pchg, + union power_supply_propval *val) +{ + enum lp8788_charging_state state; + u8 data; + int ret; + + ret = lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data); + if (ret) + return ret; + + state = (data & LP8788_CHG_STATE_M) >> LP8788_CHG_STATE_S; + switch (state) { + case OFF: + val->intval = POWER_SUPPLY_STATUS_DISCHARGING; + break; + case PRECHARGE: + case CC: + case CV: + case HIGH_CURRENT: + val->intval = POWER_SUPPLY_STATUS_CHARGING; + break; + case MAINTENANCE: + val->intval = POWER_SUPPLY_STATUS_FULL; + break; + default: + val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; + break; + } + + return 0; +} + +static int lp8788_get_battery_health(struct lp8788_charger *pchg, + union power_supply_propval *val) +{ + u8 data; + int ret; + + ret = lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data); + if (ret) + return ret; + + if (data & LP8788_NO_BATT_M) + val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; + else if (data & LP8788_BAD_BATT_M) + val->intval = POWER_SUPPLY_HEALTH_DEAD; + else + val->intval = POWER_SUPPLY_HEALTH_GOOD; + + return 0; +} + +static int lp8788_get_battery_present(struct lp8788_charger *pchg, + union power_supply_propval *val) +{ + u8 data; + int ret; + + ret = lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data); + if (ret) + return ret; + + val->intval = !(data & LP8788_NO_BATT_M); + return 0; +} + +static int lp8788_get_vbatt_adc(struct lp8788_charger *pchg, + unsigned int *result) +{ + struct iio_channel *channel = pchg->chan[VBATT]; + int ret, scaleint, scalepart; + + if (!channel) + return -EINVAL; + + ret = iio_read_channel_scale(channel, &scaleint, &scalepart); + if (ret != IIO_VAL_INT_PLUS_MICRO) + return -EINVAL; + + /* unit: mV */ + *result = (scaleint + scalepart * 1000000) / 1000; + + return 0; +} + +static int lp8788_get_battery_voltage(struct lp8788_charger *pchg, + union power_supply_propval *val) +{ + return lp8788_get_vbatt_adc(pchg, &val->intval); +} + +static int lp8788_get_battery_capacity(struct lp8788_charger *pchg, + union power_supply_propval *val) +{ + struct lp8788 *lp = pchg->lp; + unsigned int max_vbatt, vbatt; + enum lp8788_charging_state state; + struct lp8788_charger_platform_data *pdata = pchg->pdata; + u8 data; + int ret; + + if (!pdata) + return -EINVAL; + + max_vbatt = pdata->max_vbatt_mv; + if (max_vbatt == 0) + return -EINVAL; + + ret = lp8788_read_byte(lp, LP8788_CHG_STATUS, &data); + if (ret) + return ret; + + state = (data & LP8788_CHG_STATE_M) >> LP8788_CHG_STATE_S; + + if (state == MAINTENANCE) { + val->intval = MAX_BATT_CAPACITY; + } else { + ret = lp8788_get_vbatt_adc(pchg, &vbatt); + if (ret) + return ret; + + val->intval = (vbatt * MAX_BATT_CAPACITY) / max_vbatt; + val->intval = min(val->intval, MAX_BATT_CAPACITY); + } + + return 0; +} + +static int lp8788_get_battery_temperature(struct lp8788_charger *pchg, + union power_supply_propval *val) +{ + struct iio_channel *channel = pchg->chan[BATT_TEMP]; + int ret, scaleint, scalepart; + + if (!channel) + return -EINVAL; + + ret = iio_read_channel_scale(channel, &scaleint, &scalepart); + if (ret != IIO_VAL_INT_PLUS_MICRO) + return -EINVAL; + + /* unit: 0.1 'C */ + val->intval = (scaleint + scalepart * 1000000) / 100; + + return 0; +} + +static int lp8788_battery_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct lp8788_charger *pchg = dev_get_drvdata(psy->dev->parent); + + switch (psp) { + case POWER_SUPPLY_PROP_STATUS: + return lp8788_get_battery_status(pchg, val); + case POWER_SUPPLY_PROP_HEALTH: + return lp8788_get_battery_health(pchg, val); + case POWER_SUPPLY_PROP_PRESENT: + return lp8788_get_battery_present(pchg, val); + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + return lp8788_get_battery_voltage(pchg, val); + case POWER_SUPPLY_PROP_CAPACITY: + return lp8788_get_battery_capacity(pchg, val); + case POWER_SUPPLY_PROP_TEMP: + return lp8788_get_battery_temperature(pchg, val); + default: + return -EINVAL; + } +} + +static inline bool lp8788_is_valid_charger_register(u8 addr) +{ + return (addr >= LP8788_CHG_START && addr <= LP8788_CHG_END); +} + +static int lp8788_update_charger_params(struct lp8788_charger *pchg) +{ + struct lp8788 *lp = pchg->lp; + struct lp8788_charger_platform_data *pdata = pchg->pdata; + struct lp8788_chg_param *param; + int i, ret; + + if (!pdata || !pdata->chg_params) { + dev_info(lp->dev, "skip updating charger parameters\n"); + return 0; + } + + /* settting charging parameters */ + for (i = 0 ; i < pdata->num_chg_params ; i++) { + param = pdata->chg_params + i; + + if (!param) + continue; + + if (lp8788_is_valid_charger_register(param->addr)) { + ret = lp8788_write_byte(lp, param->addr, param->val); + if (ret) + return ret; + } + } + + return 0; +} + +static int lp8788_psy_register(struct platform_device *pdev, + struct lp8788_charger *pchg) +{ + pchg->charger.name = CHARGER_NAME; + pchg->charger.type = POWER_SUPPLY_TYPE_MAINS; + pchg->charger.properties = lp8788_charger_prop; + pchg->charger.num_properties = ARRAY_SIZE(lp8788_charger_prop); + pchg->charger.get_property = lp8788_charger_get_property; + pchg->charger.supplied_to = battery_supplied_to; + pchg->charger.num_supplicants = ARRAY_SIZE(battery_supplied_to); + + if (power_supply_register(&pdev->dev, &pchg->charger)) + return -EPERM; + + pchg->battery.name = BATTERY_NAME; + pchg->battery.type = POWER_SUPPLY_TYPE_BATTERY; + pchg->battery.properties = lp8788_battery_prop; + pchg->battery.num_properties = ARRAY_SIZE(lp8788_battery_prop); + pchg->battery.get_property = lp8788_battery_get_property; + + if (power_supply_register(&pdev->dev, &pchg->battery)) + return -EPERM; + + return 0; +} + +static void lp8788_psy_unregister(struct lp8788_charger *pchg) +{ + power_supply_unregister(&pchg->battery); + power_supply_unregister(&pchg->charger); +} + +static void lp8788_charger_event(struct work_struct *work) +{ + struct lp8788_charger *pchg = + container_of(work, struct lp8788_charger, charger_work); + struct lp8788_charger_platform_data *pdata = pchg->pdata; + enum lp8788_charger_event event = lp8788_is_charger_detected(pchg); + + pdata->charger_event(pchg->lp, event); +} + +static bool lp8788_find_irq_id(struct lp8788_charger *pchg, int virq, int *id) +{ + bool found; + int i; + + for (i = 0 ; i < pchg->num_irqs ; i++) { + if (pchg->irqs[i].virq == virq) { + *id = pchg->irqs[i].which; + found = true; + break; + } + } + + return found; +} + +static irqreturn_t lp8788_charger_irq_thread(int virq, void *ptr) +{ + struct lp8788_charger *pchg = ptr; + struct lp8788_charger_platform_data *pdata = pchg->pdata; + int id = -1; + + if (!lp8788_find_irq_id(pchg, virq, &id)) + return IRQ_NONE; + + switch (id) { + case LP8788_INT_CHG_INPUT_STATE: + case LP8788_INT_CHG_STATE: + case LP8788_INT_EOC: + case LP8788_INT_BATT_LOW: + case LP8788_INT_NO_BATT: + power_supply_changed(&pchg->charger); + power_supply_changed(&pchg->battery); + break; + default: + break; + } + + /* report charger dectection event if used */ + if (!pdata) + goto irq_handled; + + if (pdata->charger_event && id == LP8788_INT_CHG_INPUT_STATE) + schedule_work(&pchg->charger_work); + +irq_handled: + return IRQ_HANDLED; +} + +static int lp8788_set_irqs(struct platform_device *pdev, + struct lp8788_charger *pchg, const char *name) +{ + struct resource *r; + struct irq_domain *irqdm = pchg->lp->irqdm; + int irq_start, irq_end; + int i, ret, virq, nr_irq; + + /* no error even if no irq resource */ + r = platform_get_resource_byname(pdev, IORESOURCE_IRQ, name); + if (!r) + return 0; + + irq_start = r->start; + irq_end = r->end; + + for (i = irq_start ; i <= irq_end ; i++) { + nr_irq = pchg->num_irqs; + + virq = irq_create_mapping(irqdm, i); + pchg->irqs[nr_irq].virq = virq; + pchg->irqs[nr_irq].which = i; + pchg->num_irqs++; + + ret = request_threaded_irq(virq, NULL, + lp8788_charger_irq_thread, + 0, name, pchg); + if (ret) + break; + } + + if (i <= irq_end) + goto err_free_irq; + + return 0; + +err_free_irq: + for (i = 0 ; i < pchg->num_irqs ; i++) + free_irq(pchg->irqs[i].virq, pchg); + return ret; +} + +static int lp8788_irq_register(struct platform_device *pdev, + struct lp8788_charger *pchg) +{ + int ret, i; + struct lp8788 *lp = pchg->lp; + const char *name[] = { + LP8788_CHG_IRQ, LP8788_PRSW_IRQ, LP8788_BATT_IRQ + }; + + pchg->num_irqs = 0; + + for (i = 0 ; i < ARRAY_SIZE(name) ; i++) { + ret = lp8788_set_irqs(pdev, pchg, name[i]); + if (ret) { + dev_warn(lp->dev, "irq setup failed: %s\n", name[i]); + return ret; + } + } + + if (pchg->num_irqs > MAX_CHG_IRQS) { + dev_err(lp->dev, "invalid total number of irqs: %d\n", + pchg->num_irqs); + return -EINVAL; + } + + INIT_WORK(&pchg->charger_work, lp8788_charger_event); + + return 0; +} + +static void lp8788_irq_unregister(struct platform_device *pdev, + struct lp8788_charger *pchg) +{ + int i; + + for (i = 0 ; i < pchg->num_irqs ; i++) + free_irq(pchg->irqs[i].virq, pchg); +} + +static void lp8788_setup_adc_channel(struct lp8788_charger *pchg) +{ + struct lp8788_charger_platform_data *pdata = pchg->pdata; + struct device *dev = pchg->lp->dev; + struct iio_channel *chan; + enum lp8788_adc_id id; + const char *chan_name[LPADC_MAX] = { + [LPADC_VBATT_5P5] = "vbatt-5p5", + [LPADC_VBATT_6P0] = "vbatt-6p0", + [LPADC_VBATT_5P0] = "vbatt-5p0", + [LPADC_ADC1] = "adc1", + [LPADC_ADC2] = "adc2", + [LPADC_ADC3] = "adc3", + [LPADC_ADC4] = "adc4", + }; + + if (!pdata) + return; + + id = pdata->vbatt_adc; + switch (id) { + case LPADC_VBATT_5P5: + case LPADC_VBATT_6P0: + case LPADC_VBATT_5P0: + chan = iio_channel_get(NULL, chan_name[id]); + pchg->chan[VBATT] = IS_ERR(chan) ? NULL : chan; + break; + default: + dev_err(dev, "invalid ADC id for VBATT: %d\n", id); + pchg->chan[VBATT] = NULL; + break; + } + + id = pdata->batt_temp_adc; + switch (id) { + case LPADC_ADC1: + case LPADC_ADC2: + case LPADC_ADC3: + case LPADC_ADC4: + chan = iio_channel_get(NULL, chan_name[id]); + pchg->chan[BATT_TEMP] = IS_ERR(chan) ? NULL : chan; + break; + default: + dev_err(dev, "invalid ADC id for BATT_TEMP : %d\n", id); + pchg->chan[BATT_TEMP] = NULL; + break; + } +} + +static void lp8788_release_adc_channel(struct lp8788_charger *pchg) +{ + int i; + + for (i = 0 ; i < NUM_CHG_ADC ; i++) { + if (!pchg->chan[i]) + continue; + + iio_channel_release(pchg->chan[i]); + pchg->chan[i] = NULL; + } +} + +static ssize_t lp8788_show_charger_status(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lp8788_charger *pchg = dev_get_drvdata(dev); + enum lp8788_charging_state state; + char *desc[MAX_CHG_STATE] = { + [OFF] = "CHARGER OFF", + [WARM_UP] = "WARM UP", + [LOW_INPUT] = "LOW INPUT STATE", + [PRECHARGE] = "CHARGING - PRECHARGE", + [CC] = "CHARGING - CC", + [CV] = "CHARGING - CV", + [MAINTENANCE] = "NO CHARGING - MAINTENANCE", + [BATTERY_FAULT] = "BATTERY FAULT", + [SYSTEM_SUPPORT] = "SYSTEM SUPPORT", + [HIGH_CURRENT] = "HIGH CURRENT", + }; + u8 data; + + lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data); + state = (data & LP8788_CHG_STATE_M) >> LP8788_CHG_STATE_S; + + return scnprintf(buf, BUF_SIZE, "%s\n", desc[state]); +} + +static ssize_t lp8788_show_idcin(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lp8788_charger *pchg = dev_get_drvdata(dev); + int isel; + u8 val; + + lp8788_read_byte(pchg->lp, LP8788_CHG_IDCIN, &val); + isel = LP8788_ISEL_STEP * (min_t(int, val, LP8788_ISEL_MAX) + 1); + + return scnprintf(buf, BUF_SIZE, + "Charger Input Current Limit: %dmA\n", isel); +} + +static ssize_t lp8788_show_ibatt(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lp8788_charger *pchg = dev_get_drvdata(dev); + int isel; + u8 val; + + lp8788_read_byte(pchg->lp, LP8788_CHG_IBATT, &val); + val &= LP8788_CHG_IBATT_M; + isel = LP8788_ISEL_STEP * (min_t(int, val, LP8788_ISEL_MAX) + 1); + + return scnprintf(buf, BUF_SIZE, + "Battery Charging Current: %dmA\n", isel); +} + +static ssize_t lp8788_show_vterm(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lp8788_charger *pchg = dev_get_drvdata(dev); + int vsel; + u8 val; + + lp8788_read_byte(pchg->lp, LP8788_CHG_VTERM, &val); + val &= LP8788_CHG_VTERM_M; + vsel = LP8788_VTERM_MIN + LP8788_VTERM_STEP * val; + + return scnprintf(buf, BUF_SIZE, + "Charger Termination Voltage: %dmV\n", vsel); +} + +static ssize_t lp8788_show_eoc_time(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lp8788_charger *pchg = dev_get_drvdata(dev); + char *stime[] = { "400ms", "5min", "10min", "15min", + "20min", "25min", "30min" "No timeout" }; + u8 val; + + lp8788_read_byte(pchg->lp, LP8788_CHG_EOC, &val); + val = (val & LP8788_CHG_EOC_TIME_M) >> LP8788_CHG_EOC_TIME_S; + + return scnprintf(buf, BUF_SIZE, "End Of Charge Time: %s\n", stime[val]); +} + +static ssize_t lp8788_show_eoc_level(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lp8788_charger *pchg = dev_get_drvdata(dev); + char *abs_level[] = { "25mA", "49mA", "75mA", "98mA" }; + char *relative_level[] = { "5%", "10%", "15%", "20%" }; + char *level; + u8 val, mode; + + lp8788_read_byte(pchg->lp, LP8788_CHG_EOC, &val); + + mode = val & LP8788_CHG_EOC_MODE_M; + val = (val & LP8788_CHG_EOC_LEVEL_M) >> LP8788_CHG_EOC_LEVEL_S; + level = mode ? abs_level[val] : relative_level[val]; + + return scnprintf(buf, BUF_SIZE, "End Of Charge Level: %s\n", level); +} + +static DEVICE_ATTR(charger_status, S_IRUSR, lp8788_show_charger_status, NULL); +static DEVICE_ATTR(idcin, S_IRUSR, lp8788_show_idcin, NULL); +static DEVICE_ATTR(ibatt, S_IRUSR, lp8788_show_ibatt, NULL); +static DEVICE_ATTR(vterm, S_IRUSR, lp8788_show_vterm, NULL); +static DEVICE_ATTR(eoc_time, S_IRUSR, lp8788_show_eoc_time, NULL); +static DEVICE_ATTR(eoc_level, S_IRUSR, lp8788_show_eoc_level, NULL); + +static struct attribute *lp8788_charger_attr[] = { + &dev_attr_charger_status.attr, + &dev_attr_idcin.attr, + &dev_attr_ibatt.attr, + &dev_attr_vterm.attr, + &dev_attr_eoc_time.attr, + &dev_attr_eoc_level.attr, + NULL, +}; + +static const struct attribute_group lp8788_attr_group = { + .attrs = lp8788_charger_attr, +}; + +static __devinit int lp8788_charger_probe(struct platform_device *pdev) +{ + struct lp8788 *lp = dev_get_drvdata(pdev->dev.parent); + struct lp8788_charger *pchg; + int ret; + + pchg = devm_kzalloc(lp->dev, sizeof(struct lp8788_charger), GFP_KERNEL); + if (!pchg) + return -ENOMEM; + + pchg->lp = lp; + pchg->pdata = lp->pdata ? lp->pdata->chg_pdata : NULL; + platform_set_drvdata(pdev, pchg); + + ret = lp8788_update_charger_params(pchg); + if (ret) + return ret; + + lp8788_setup_adc_channel(pchg); + + ret = lp8788_psy_register(pdev, pchg); + if (ret) + return ret; + + ret = sysfs_create_group(&pdev->dev.kobj, &lp8788_attr_group); + if (ret) { + lp8788_psy_unregister(pchg); + return ret; + } + + ret = lp8788_irq_register(pdev, pchg); + if (ret) + dev_warn(lp->dev, "failed to register charger irq: %d\n", ret); + + return 0; +} + +static int __devexit lp8788_charger_remove(struct platform_device *pdev) +{ + struct lp8788_charger *pchg = platform_get_drvdata(pdev); + + if (pchg->charger_work.func) + flush_work_sync(&pchg->charger_work); + + lp8788_irq_unregister(pdev, pchg); + sysfs_remove_group(&pdev->dev.kobj, &lp8788_attr_group); + lp8788_psy_unregister(pchg); + lp8788_release_adc_channel(pchg); + + return 0; +} + +static struct platform_driver lp8788_charger_driver = { + .probe = lp8788_charger_probe, + .remove = __devexit_p(lp8788_charger_remove), + .driver = { + .name = LP8788_DEV_CHARGER, + .owner = THIS_MODULE, + }, +}; +module_platform_driver(lp8788_charger_driver); + +MODULE_DESCRIPTION("TI LP8788 Charger Driver"); +MODULE_AUTHOR("Milo Kim"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:lp8788-charger"); -- 1.7.2.5 Best Regards, Milo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/