From patchwork Wed Feb 6 09:41:14 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matti Vaittinen X-Patchwork-Id: 1037398 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-gpio-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=fi.rohmeurope.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 43vc0K68w2z9sDL for ; Wed, 6 Feb 2019 20:41:37 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729059AbfBFJlc (ORCPT ); Wed, 6 Feb 2019 04:41:32 -0500 Received: from mail-lj1-f195.google.com ([209.85.208.195]:35292 "EHLO mail-lj1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726715AbfBFJlb (ORCPT ); Wed, 6 Feb 2019 04:41:31 -0500 Received: by mail-lj1-f195.google.com with SMTP id 132-v6so2840743ljf.2; Wed, 06 Feb 2019 01:41:27 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=8gylY1WDGCM0t0IALkAlvoBXfNmKD37JNY4n2DRk6ZI=; b=CiQg+fO7JI4sMLYqsZvjlUOnpii1/MCxMEZv5oyfA+VCFhmRGoI3V5SFjig0KiJtHc ol3EeHojTKPFtfkScvLNoVECJMHHm1sNL1ydrPXL1SPCzfGT+LMjVK0ZbXzOoTTArEf2 OoOWNOBS3x7r8khFEhIR8/1Tg2DrAIc8/3I3CHLx4wDoRr+I8l7zl3YaIMZiWr654DAw mAsboH95/aNWLS/1lTv5V3uVcaeD4ijuvG/UD9aGwZO/ABuyYExBRU8WjvYAT30n5TA+ 7WyL9wZnSKdMkl/7sRot69BUmyGBYZyFwUKsbCTc3/WO9fkndpdIJGQ3+KVzNHkBUnRU JW0g== X-Gm-Message-State: AHQUAuaxD5UlfaXUqnqSQqSZLvkSNDbOUfFqnyqfGQf4FySNLTW0E88u /MxKao3M9RS6qB89UQJaCiE= X-Google-Smtp-Source: AHgI3IYcrm6FCtGlEA2zBeujF/2cEN8h3DoJRPa4WqPVk/YBLuE/oLQjoVpVYmTWX9yJeuYgAQJL+w== X-Received: by 2002:a2e:9d17:: with SMTP id t23-v6mr5773957lji.57.1549446086737; Wed, 06 Feb 2019 01:41:26 -0800 (PST) Received: from localhost.localdomain ([213.255.186.46]) by smtp.gmail.com with ESMTPSA id o14-v6sm3665117lji.70.2019.02.06.01.41.24 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 06 Feb 2019 01:41:26 -0800 (PST) Date: Wed, 6 Feb 2019 11:41:14 +0200 From: Matti Vaittinen To: Matti Vaittinen , mazziesaccount@gmail.com Cc: Guenter Roeck , heikki.haikola@fi.rohmeurope.com, mikko.mutanen@fi.rohmeurope.com, lee.jones@linaro.org, robh+dt@kernel.org, mark.rutland@arm.com, broonie@kernel.org, gregkh@linuxfoundation.org, rafael@kernel.org, mturquette@baylibre.com, sboyd@kernel.org, linus.walleij@linaro.org, bgolaszewski@baylibre.com, sre@kernel.org, lgirdwood@gmail.com, a.zummo@towertech.it, alexandre.belloni@bootlin.com, wim@linux-watchdog.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, linux-gpio@vger.kernel.org, linux-pm@vger.kernel.org, linux-rtc@vger.kernel.org, linux-watchdog@vger.kernel.org Subject: [PATCH v7 09/10] power: supply: Initial support for ROHM BD70528 PMIC charger block Message-ID: <1eba0a8b50957a310be77cdc156624bb74ec817a.1549444366.git.matti.vaittinen@fi.rohmeurope.com> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.2 (2017-12-15) Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org ROHM BD70528 PMIC includes battery charger block. Support charger staus queries and doing few basic settings like input current limit and charging current. Signed-off-by: Matti Vaittinen --- drivers/power/supply/Kconfig | 9 + drivers/power/supply/Makefile | 1 + drivers/power/supply/bd70528-charger.c | 738 +++++++++++++++++++++++++++++++++ 3 files changed, 748 insertions(+) create mode 100644 drivers/power/supply/bd70528-charger.c diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index e901b9879e7e..903c97a67bf0 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -660,4 +660,13 @@ config FUEL_GAUGE_SC27XX Say Y here to enable support for fuel gauge with SC27XX PMIC chips. +config CHARGER_BD70528 + tristate "ROHM bd70528 charger driver" + depends on MFD_ROHM_BD70528 + default n + help + Say Y here to enable support for getting battery status + information and altering charger configurations from charger + block of the ROHM BD70528 Power Management IC. + endif # POWER_SUPPLY diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile index b731c2a9b695..c60387b04bfa 100644 --- a/drivers/power/supply/Makefile +++ b/drivers/power/supply/Makefile @@ -87,3 +87,4 @@ obj-$(CONFIG_AXP288_CHARGER) += axp288_charger.o obj-$(CONFIG_CHARGER_CROS_USBPD) += cros_usbpd-charger.o obj-$(CONFIG_CHARGER_SC2731) += sc2731_charger.o obj-$(CONFIG_FUEL_GAUGE_SC27XX) += sc27xx_fuel_gauge.o +obj-$(CONFIG_CHARGER_BD70528) += bd70528-charger.o diff --git a/drivers/power/supply/bd70528-charger.c b/drivers/power/supply/bd70528-charger.c new file mode 100644 index 000000000000..db2824a9d960 --- /dev/null +++ b/drivers/power/supply/bd70528-charger.c @@ -0,0 +1,738 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +// +// Copyright (C) 2018 ROHM Semiconductors +// +// power-supply driver for ROHM BD70528 PMIC + +/* + * BD70528 charger HW state machine. + * + * The thermal shutdown state is not drawn. From any other state but + * battery error and suspend it is possible to go to TSD/TMP states + * if temperature is out of bounds. + * + * CHG_RST = H + * or CHG_EN=L + * or (DCIN2_UVLO=L && DCIN1_UVLO=L) + * or (DCIN2_OVLO=H & DCIN1_UVKLO=L) + * + * +--------------+ +--------------+ + * | | | | + * | Any state +-------> | Suspend | + * | | | | + * +--------------+ +------+-------+ + * | + * CHG_EN = H && BAT_DET = H && | + * No errors (temp, bat_ov, UVLO, | + * OVLO...) | + * | + * BAT_OV or +---------v----------+ + * (DBAT && TTRI) | | + * +-----------------+ Trickle Charge | <---------------+ + * | | | | + * | +-------+------------+ | + * | | | + * | | ^ | + * | V_BAT > VTRI_TH | | VBAT < VTRI_TH - 50mV | + * | | | | + * | v | | + * | | | + * | BAT_OV or +----------+----+ | + * | (DBAT && TFST) | | | + * | +----------------+ Fast Charge | | + * | | | | | + * v v +----+----------+ | + * | | + *+----------------+ ILIM_DET=L | ^ ILIM_DET | + *| | & CV_DET=H | | or CV_DET=L | + *| Battery Error | & VBAT > | | or VBAT < VRECHG_TH | + *| | VRECHG_TH | | or IBAT > IFST/x | + *+----------------+ & IBAT < | | | + * IFST/x v | | + * ^ | | + * | +---------+-+ | + * | | | | + * +-------------------+ Top OFF | | + * BAT_OV = H or | | | + * (DBAT && TFST) +-----+-----+ | + * | | + * Stay top-off for 15s | | + * v | + * | + * +--------+ | + * | | | + * | Done +-------------------------+ + * | | + * +--------+ VBAT < VRECHG_TH + */ + +#include +#include +#include +#include +#include +#include + +#define CHG_STAT_SUSPEND 0x0 +#define CHG_STAT_TRICKLE 0x1 +#define CHG_STAT_FAST 0x3 +#define CHG_STAT_TOPOFF 0xe +#define CHG_STAT_DONE 0xf +#define CHG_STAT_OTP_TRICKLE 0x10 +#define CHG_STAT_OTP_FAST 0x11 +#define CHG_STAT_OTP_DONE 0x12 +#define CHG_STAT_TSD_TRICKLE 0x20 +#define CHG_STAT_TSD_FAST 0x21 +#define CHG_STAT_TSD_TOPOFF 0x22 +#define CHG_STAT_BAT_ERR 0x7f + +static const char *bd70528_charger_model = "BD70528"; +static const char *bd70528_charger_manufacturer = "ROHM Semiconductors"; + +#define BD_ERR_IRQ_HND(_name_, _wrn_) \ +static irqreturn_t bd0528_##_name_##_interrupt(int irq, void *arg) \ +{ \ + struct power_supply *psy = (struct power_supply *)arg; \ + \ + power_supply_changed(psy); \ + dev_err(&psy->dev, (_wrn_)); \ + \ + return IRQ_HANDLED; \ +} + +#define BD_INFO_IRQ_HND(_name_, _wrn_) \ +static irqreturn_t bd0528_##_name_##_interrupt(int irq, void *arg) \ +{ \ + struct power_supply *psy = (struct power_supply *)arg; \ + \ + power_supply_changed(psy); \ + dev_dbg(&psy->dev, (_wrn_)); \ + \ + return IRQ_HANDLED; \ +} + +#define BD_IRQ_HND(_name_) bd0528_##_name_##_interrupt + +struct bd70528_psy { + struct rohm_regmap_dev chip; + struct power_supply *psy; +}; + +BD_ERR_IRQ_HND(BAT_OV_DET, "Battery overvoltage detected\n"); +BD_ERR_IRQ_HND(DBAT_DET, "Dead battery detected\n"); +BD_ERR_IRQ_HND(COLD_DET, "Battery cold\n"); +BD_ERR_IRQ_HND(HOT_DET, "Battery hot\n"); +BD_ERR_IRQ_HND(CHG_TSD, "Charger thermal shutdown\n"); +BD_ERR_IRQ_HND(DCIN2_OV_DET, "DCIN2 overvoltage detected\n"); + +BD_INFO_IRQ_HND(BAT_OV_RES, "Battery voltage back to normal\n"); +BD_INFO_IRQ_HND(COLD_RES, "Battery temperature back to normal\n"); +BD_INFO_IRQ_HND(HOT_RES, "Battery temperature back to normal\n"); +BD_INFO_IRQ_HND(BAT_RMV, "Battery removed\n"); +BD_INFO_IRQ_HND(BAT_DET, "Battery detected\n"); +BD_INFO_IRQ_HND(DCIN2_OV_RES, "DCIN2 voltage back to normal\n"); +BD_INFO_IRQ_HND(DCIN2_RMV, "DCIN2 removed\n"); +BD_INFO_IRQ_HND(DCIN2_DET, "DCIN2 detected\n"); +BD_INFO_IRQ_HND(DCIN1_RMV, "DCIN1 removed\n"); +BD_INFO_IRQ_HND(DCIN1_DET, "DCIN1 detected\n"); + +struct irq_name_pair { + const char *n; + irqreturn_t (*h)(int irq, void *arg); +}; + +static int bd70528_get_irqs(struct platform_device *pdev, + struct bd70528_psy *bdpsy) +{ + int irq, i, ret; + unsigned int mask; + struct irq_name_pair bd70528_chg_irqs[] = { + { .n = "bd70528-bat-ov-res", .h = BD_IRQ_HND(BAT_OV_RES) }, + { .n = "bd70528-bat-ov-det", .h = BD_IRQ_HND(BAT_OV_DET) }, + { .n = "bd70528-bat-dead", .h = BD_IRQ_HND(DBAT_DET) }, + { .n = "bd70528-bat-warmed", .h = BD_IRQ_HND(COLD_RES) }, + { .n = "bd70528-bat-cold", .h = BD_IRQ_HND(COLD_DET) }, + { .n = "bd70528-bat-cooled", .h = BD_IRQ_HND(HOT_RES) }, + { .n = "bd70528-bat-hot", .h = BD_IRQ_HND(HOT_DET) }, + { .n = "bd70528-chg-tshd", .h = BD_IRQ_HND(CHG_TSD) }, + { .n = "bd70528-bat-removed", .h = BD_IRQ_HND(BAT_RMV) }, + { .n = "bd70528-bat-detected", .h = BD_IRQ_HND(BAT_DET) }, + { .n = "bd70528-dcin2-ov-res", .h = BD_IRQ_HND(DCIN2_OV_RES) }, + { .n = "bd70528-dcin2-ov-det", .h = BD_IRQ_HND(DCIN2_OV_DET) }, + { .n = "bd70528-dcin2-removed", .h = BD_IRQ_HND(DCIN2_RMV) }, + { .n = "bd70528-dcin2-detected", .h = BD_IRQ_HND(DCIN2_DET) }, + { .n = "bd70528-dcin1-removed", .h = BD_IRQ_HND(DCIN1_RMV) }, + { .n = "bd70528-dcin1-detected", .h = BD_IRQ_HND(DCIN1_DET) }, + }; + + for (i = 0; i < ARRAY_SIZE(bd70528_chg_irqs); i++) { + irq = platform_get_irq_byname(pdev, bd70528_chg_irqs[i].n); + if (irq < 0) { + dev_err(&pdev->dev, "Bad IRQ information for %s (%d)\n", + bd70528_chg_irqs[i].n, irq); + return irq; + } + ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, + bd70528_chg_irqs[i].h, + IRQF_ONESHOT, + bd70528_chg_irqs[i].n, + bdpsy->psy); + + if (ret) + return ret; + } + /* + * BD70528 irq controller is not touching the main mask register. + * So enable the charger block interrupts at main level. We can just + * leave them enabled as irq-controller should disable irqs + * from sub-registers when IRQ is disabled or freed. + */ + mask = BD70528_REG_INT_BAT1_MASK | BD70528_REG_INT_BAT2_MASK; + ret = regmap_update_bits(bdpsy->chip.regmap, + BD70528_REG_INT_MAIN_MASK, mask, 0); + if (ret) + dev_err(&pdev->dev, "Failed to enable charger IRQs\n"); + + return ret; +} + +static int bd70528_get_charger_status(struct bd70528_psy *bdpsy, int *val) +{ + int ret; + unsigned int v; + + ret = regmap_read(bdpsy->chip.regmap, BD70528_REG_CHG_CURR_STAT, &v); + if (ret) { + dev_err(bdpsy->chip.dev, "Charger state read failure %d\n", + ret); + return ret; + } + + switch (v & BD70528_MASK_CHG_STAT) { + case CHG_STAT_SUSPEND: + /* Maybe we should check the CHG_TTRI_EN? */ + case CHG_STAT_OTP_TRICKLE: + case CHG_STAT_OTP_FAST: + case CHG_STAT_OTP_DONE: + case CHG_STAT_TSD_TRICKLE: + case CHG_STAT_TSD_FAST: + case CHG_STAT_TSD_TOPOFF: + case CHG_STAT_BAT_ERR: + *val = POWER_SUPPLY_STATUS_NOT_CHARGING; + break; + case CHG_STAT_DONE: + *val = POWER_SUPPLY_STATUS_FULL; + break; + case CHG_STAT_TRICKLE: + case CHG_STAT_FAST: + case CHG_STAT_TOPOFF: + *val = POWER_SUPPLY_STATUS_CHARGING; + break; + default: + *val = POWER_SUPPLY_STATUS_UNKNOWN; + break; + } + + return 0; +} + +static int bd70528_get_charge_type(struct bd70528_psy *bdpsy, int *val) +{ + int ret; + unsigned int v; + + ret = regmap_read(bdpsy->chip.regmap, BD70528_REG_CHG_CURR_STAT, &v); + if (ret) { + dev_err(bdpsy->chip.dev, "Charger state read failure %d\n", + ret); + return ret; + } + + switch (v & BD70528_MASK_CHG_STAT) { + case CHG_STAT_TRICKLE: + *val = POWER_SUPPLY_CHARGE_TYPE_TRICKLE; + break; + case CHG_STAT_FAST: + case CHG_STAT_TOPOFF: + *val = POWER_SUPPLY_CHARGE_TYPE_FAST; + break; + case CHG_STAT_DONE: + case CHG_STAT_SUSPEND: + /* Maybe we should check the CHG_TTRI_EN? */ + case CHG_STAT_OTP_TRICKLE: + case CHG_STAT_OTP_FAST: + case CHG_STAT_OTP_DONE: + case CHG_STAT_TSD_TRICKLE: + case CHG_STAT_TSD_FAST: + case CHG_STAT_TSD_TOPOFF: + case CHG_STAT_BAT_ERR: + *val = POWER_SUPPLY_CHARGE_TYPE_NONE; + break; + default: + *val = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN; + break; + } + + return 0; +} + +static int bd70528_get_battery_health(struct bd70528_psy *bdpsy, int *val) +{ + int ret; + unsigned int v; + + ret = regmap_read(bdpsy->chip.regmap, BD70528_REG_CHG_BAT_STAT, &v); + if (ret) { + dev_err(bdpsy->chip.dev, "Battery state read failure %d\n", + ret); + return ret; + } + /* No battery? */ + if (!(v & BD70528_MASK_CHG_BAT_DETECT)) + *val = POWER_SUPPLY_HEALTH_DEAD; + else if (v & BD70528_MASK_CHG_BAT_OVERVOLT) + *val = POWER_SUPPLY_HEALTH_OVERVOLTAGE; + else if (v & BD70528_MASK_CHG_BAT_TIMER) + *val = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE; + else + *val = POWER_SUPPLY_HEALTH_GOOD; + + return 0; +} + +static int bd70528_get_online(struct bd70528_psy *bdpsy, int *val) +{ + int ret; + unsigned int v; + + ret = regmap_read(bdpsy->chip.regmap, BD70528_REG_CHG_IN_STAT, &v); + if (ret) { + dev_err(bdpsy->chip.dev, "DC1 IN state read failure %d\n", + ret); + return ret; + } + + *val = (v & BD70528_MASK_CHG_DCIN1_UVLO) ? 1 : 0; + + return 0; +} + +static int bd70528_get_present(struct bd70528_psy *bdpsy, int *val) +{ + int ret; + unsigned int v; + + ret = regmap_read(bdpsy->chip.regmap, BD70528_REG_CHG_BAT_STAT, &v); + if (ret) { + dev_err(bdpsy->chip.dev, "Battery state read failure %d\n", + ret); + return ret; + } + + *val = (v & BD70528_MASK_CHG_BAT_DETECT) ? 1 : 0; + + return 0; +} + +struct linear_range { + int min; + int step; + int vals; + int low_sel; +}; + +struct linear_range current_limit_ranges[] = { + { + .min = 5, + .step = 1, + .vals = 36, + .low_sel = 0, + }, + { + .min = 40, + .step = 5, + .vals = 5, + .low_sel = 0x23, + }, + { + .min = 60, + .step = 20, + .vals = 8, + .low_sel = 0x27, + }, + { + .min = 200, + .step = 50, + .vals = 7, + .low_sel = 0x2e, + } +}; + +/* + * BD70528 would support setting and getting own charge current/ + * voltage for low temperatures. The driver currently only reads + * the charge current at room temperature. We do set both though. + */ +struct linear_range warm_charge_curr[] = { + { + .min = 10, + .step = 10, + .vals = 20, + .low_sel = 0, + }, + { + .min = 200, + .step = 25, + .vals = 13, + .low_sel = 0x13, + }, +}; + +/* + * Cold charge current selectors are identical to warm charge current + * selectors. The difference is that only smaller currents are available + * at cold charge range. + */ +#define MAX_COLD_CHG_CURR_SEL 0x15 +#define MAX_WARM_CHG_CURR_SEL 0x1f +#define MIN_CHG_CURR_SEL 0x0 + +static int find_value_for_selector_low(struct linear_range *r, int selectors, + unsigned int sel, unsigned int *val) +{ + int i; + + for (i = 0; i < selectors; i++) { + if (r[i].low_sel <= sel && r[i].low_sel + r[i].vals >= sel) { + *val = r[i].min + (sel - r[i].low_sel) * r[i].step; + return 0; + } + + } + return -EINVAL; +} + +/* + * For BD70528 voltage/current limits we happily accept any value which + * belongs the range. We could check if value matching the selector is + * desired by computing the range min + (sel - sel_low) * range step - but + * I guess it is enough if we use voltage/current which is closest (below) + * the requested? + */ +static int find_selector_for_value_low(struct linear_range *r, int selectors, + unsigned int val, unsigned int *sel, + bool *found) +{ + int i; + int ret = -EINVAL; + + *found = false; + for (i = 0; i < selectors; i++) { + if (r[i].min <= val) { + if (r[i].min + r[i].step * r[i].vals >= val) { + *found = true; + *sel = r[i].low_sel + (val - r[i].min) / + r[i].step; + ret = 0; + break; + } + /* + * If the range max is smaller than requested + * we can set the max supported value from range + */ + *sel = r[i].low_sel + r[i].vals; + ret = 0; + } + } + return ret; +} + +static int get_charge_current(struct bd70528_psy *bdpsy, int *ma) +{ + unsigned int sel; + int ret; + + ret = regmap_read(bdpsy->chip.regmap, BD70528_REG_CHG_CHG_CURR_WARM, + &sel); + if (ret) { + dev_err(bdpsy->chip.dev, + "Charge current reading failed (%d)\n", ret); + return ret; + } + + sel &= BD70528_MASK_CHG_CHG_CURR; + + ret = find_value_for_selector_low(&warm_charge_curr[0], + ARRAY_SIZE(warm_charge_curr), sel, + ma); + if (ret) { + dev_err(bdpsy->chip.dev, + "Unknown charge current value 0x%x\n", + sel); + } + + return ret; +} + +static int get_current_limit(struct bd70528_psy *bdpsy, int *ma) +{ + unsigned int sel; + int ret; + + ret = regmap_read(bdpsy->chip.regmap, BD70528_REG_CHG_DCIN_ILIM, + &sel); + + if (ret) { + dev_err(bdpsy->chip.dev, + "Input current limit reading failed (%d)\n", ret); + return ret; + } + + sel &= BD70528_MASK_CHG_DCIN_ILIM; + + ret = find_value_for_selector_low(¤t_limit_ranges[0], + ARRAY_SIZE(current_limit_ranges), sel, + ma); + + if (ret) { + /* Unspecified values mean 500 mA */ + *ma = 500; + } + return 0; +} + +static enum power_supply_property bd70528_charger_props[] = { + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_CHARGE_TYPE, + POWER_SUPPLY_PROP_HEALTH, + POWER_SUPPLY_PROP_PRESENT, + POWER_SUPPLY_PROP_ONLINE, + POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, + POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT, + POWER_SUPPLY_PROP_MODEL_NAME, + POWER_SUPPLY_PROP_MANUFACTURER, +}; + +static int bd70528_charger_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct bd70528_psy *bdpsy = power_supply_get_drvdata(psy); + int ret = 0; + + switch (psp) { + case POWER_SUPPLY_PROP_STATUS: + return bd70528_get_charger_status(bdpsy, &val->intval); + case POWER_SUPPLY_PROP_CHARGE_TYPE: + return bd70528_get_charge_type(bdpsy, &val->intval); + case POWER_SUPPLY_PROP_HEALTH: + return bd70528_get_battery_health(bdpsy, &val->intval); + case POWER_SUPPLY_PROP_PRESENT: + return bd70528_get_present(bdpsy, &val->intval); + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: + ret = get_current_limit(bdpsy, &val->intval); + val->intval *= 1000; + return ret; + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: + ret = get_charge_current(bdpsy, &val->intval); + val->intval *= 1000; + return ret; + case POWER_SUPPLY_PROP_ONLINE: + return bd70528_get_online(bdpsy, &val->intval); + case POWER_SUPPLY_PROP_MODEL_NAME: + val->strval = bd70528_charger_model; + return 0; + case POWER_SUPPLY_PROP_MANUFACTURER: + val->strval = bd70528_charger_manufacturer; + return 0; + default: + break; + } + + return -EINVAL; +} + +static int bd70528_prop_is_writable(struct power_supply *psy, + enum power_supply_property psp) +{ + switch (psp) { + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: + return 1; + default: + break; + } + return 0; +} + + + +static int set_charge_current(struct bd70528_psy *bdpsy, int ma) +{ + unsigned int reg; + int ret = 0, tmpret; + bool found; + + if (ma > 500) { + dev_warn(bdpsy->chip.dev, + "Requested charge current %u exceed maximum (500mA)\n", + ma); + reg = MAX_WARM_CHG_CURR_SEL; + goto set; + } + if (ma < 10) { + dev_err(bdpsy->chip.dev, + "Requested charge current %u smaller than min (10mA)\n", + ma); + reg = MIN_CHG_CURR_SEL; + ret = -EINVAL; + goto set; + } + + ret = find_selector_for_value_low(&warm_charge_curr[0], + ARRAY_SIZE(warm_charge_curr), ma, + ®, &found); + + if (!found) { + /* There was a gap in supported values and we hit it */ + dev_warn(bdpsy->chip.dev, + "Unsupported charge current %u mA\n", ma); + } +set: + + tmpret = regmap_update_bits(bdpsy->chip.regmap, + BD70528_REG_CHG_CHG_CURR_WARM, + BD70528_MASK_CHG_CHG_CURR, reg); + if (tmpret) + dev_err(bdpsy->chip.dev, + "Charge current write failure (%d)\n", tmpret); + + if (reg > MAX_COLD_CHG_CURR_SEL) + reg = MAX_COLD_CHG_CURR_SEL; + + if (!tmpret) + tmpret = regmap_update_bits(bdpsy->chip.regmap, + BD70528_REG_CHG_CHG_CURR_COLD, + BD70528_MASK_CHG_CHG_CURR, reg); + + if (!ret) + ret = tmpret; + + return ret; +} + +#define MAX_CURR_LIMIT_SEL 0x34 +#define MIN_CURR_LIMIT_SEL 0x0 + +static int set_current_limit(struct bd70528_psy *bdpsy, int ma) +{ + unsigned int reg; + int ret = 0, tmpret; + bool found; + + if (ma > 500) { + dev_warn(bdpsy->chip.dev, + "Requested current limit %u exceed maximum (500mA)\n", + ma); + reg = MAX_CURR_LIMIT_SEL; + goto set; + } + if (ma < 5) { + dev_err(bdpsy->chip.dev, + "Requested current limit %u smaller than min (5mA)\n", + ma); + reg = MIN_CURR_LIMIT_SEL; + ret = -EINVAL; + goto set; + } + + ret = find_selector_for_value_low(¤t_limit_ranges[0], + ARRAY_SIZE(current_limit_ranges), ma, + ®, &found); + if (!found) { + /* There was a gap in supported values and we hit it ?*/ + dev_warn(bdpsy->chip.dev, "Unsupported current limit %umA\n", + ma); + } + +set: + tmpret = regmap_update_bits(bdpsy->chip.regmap, + BD70528_REG_CHG_DCIN_ILIM, + BD70528_MASK_CHG_DCIN_ILIM, reg); + + if (!ret) + ret = tmpret; + + return ret; +} + +static int bd70528_charger_set_property(struct power_supply *psy, + enum power_supply_property psp, + const union power_supply_propval *val) +{ + struct bd70528_psy *bdpsy = power_supply_get_drvdata(psy); + + switch (psp) { + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: + return set_current_limit(bdpsy, val->intval / 1000); + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: + return set_charge_current(bdpsy, val->intval / 1000); + default: + break; + } + return -EINVAL; +} + +static const struct power_supply_desc bd70528_charger_desc = { + .name = "bd70528-charger", + .type = POWER_SUPPLY_TYPE_BATTERY, + .properties = bd70528_charger_props, + .num_properties = ARRAY_SIZE(bd70528_charger_props), + .get_property = bd70528_charger_get_property, + .set_property = bd70528_charger_set_property, + .property_is_writeable = bd70528_prop_is_writable, +}; + +static int bd70528_power_probe(struct platform_device *pdev) +{ + struct rohm_regmap_dev *mfd; + struct bd70528_psy *bdpsy; + struct power_supply_config cfg = {}; + + mfd = dev_get_drvdata(pdev->dev.parent); + if (!mfd) { + dev_err(&pdev->dev, "No MFD driver data\n"); + return -EINVAL; + } + bdpsy = devm_kzalloc(&pdev->dev, sizeof(*bdpsy), GFP_KERNEL); + if (!bdpsy) + return -ENOMEM; + bdpsy->chip = *mfd; + bdpsy->chip.dev = &pdev->dev; + + platform_set_drvdata(pdev, bdpsy); + cfg.drv_data = bdpsy; + cfg.of_node = pdev->dev.parent->of_node; + + bdpsy->psy = devm_power_supply_register(&pdev->dev, + &bd70528_charger_desc, &cfg); + if (IS_ERR(bdpsy->psy)) { + dev_err(&pdev->dev, "failed: power supply register\n"); + return PTR_ERR(bdpsy->psy); + } + + return bd70528_get_irqs(pdev, bdpsy); +} + +static struct platform_driver bd70528_power = { + .driver = { + .name = "bd70528-power" + }, + .probe = bd70528_power_probe, +}; + +module_platform_driver(bd70528_power); + +MODULE_AUTHOR("Matti Vaittinen "); +MODULE_DESCRIPTION("BD70528 power-supply driver"); +MODULE_LICENSE("GPL");