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Message-ID: <20220912102645.els7ku3dyo7rnwzh@mercury.elektranox.org>
Date: Mon, 12 Sep 2022 12:26:45 +0200
From: Sebastian Reichel <sebastian.reichel@...labora.com>
To: ChiaEn Wu <peterwu.pub@...il.com>
Cc: pavel@....cz, robh+dt@...nel.org,
krzysztof.kozlowski+dt@...aro.org, matthias.bgg@...il.com,
jic23@...nel.org, lars@...afoo.de, broonie@...nel.org,
mazziesaccount@...il.com, chiaen_wu@...htek.com,
alice_chen@...htek.com, cy_huang@...htek.com,
linux-leds@...r.kernel.org, devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
linux-pm@...r.kernel.org, linux-iio@...r.kernel.org,
szunichen@...il.com, Andy Shevchenko <andy.shevchenko@...il.com>
Subject: Re: [PATCH v10 6/8] power: supply: mt6370: Add MediaTek MT6370
charger driver
Hi,
On Tue, Sep 06, 2022 at 04:34:02PM +0800, ChiaEn Wu wrote:
> From: ChiaEn Wu <chiaen_wu@...htek.com>
>
> MediaTek MT6370 is a SubPMIC consisting of a single cell battery charger
> with ADC monitoring, RGB LEDs, dual channel flashlight, WLED backlight
> driver, display bias voltage supply, one general purpose LDO, and the
> USB Type-C & PD controller complies with the latest USB Type-C and PD
> standards.
>
> Add support for the MediaTek MT6370 Charger driver. The charger module
> of MT6370 supports High-Accuracy Voltage/Current Regulation,
> Average Input Current Regulation, Battery Temperature Sensing,
> Over-Temperature Protection, DPDM Detection for BC1.2.
>
> Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
> Signed-off-by: ChiaEn Wu <chiaen_wu@...htek.com>
> ---
Acked-by: Sebastian Reichel <sebastian.reichel@...labora.com>
-- Sebastian
>
> v10
> - Add a feature (disable input current limit) in 'mt6370_chg_init_setting()'
> - Add the header file <linux/devm-helpers.h> for using
> 'devm_work_autocancel()' and 'devm_delayed_work_autocancel()
> - Rename 'pwr_rdy' to 'opposite_pwr_rdy' in 'mt6370_chg_pwr_rdy_check()'
> - Rename enum elements
> ('MT6370_ATTACH_STAT_ATTACH_BC12_NOT_DONE' -->
> 'MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12')
> - Revise the assignment value of 'val.intval' in
> 'mt6370_chg_pwr_rdy_check()' to make the code easy to read.
> - Revise the initialization of bc12_work (INIT_WORK() -->
> using devm_work_autocancel()) and mivr_dwork
> (INIT_DELAYED_WORK + devm_add_action_or_reset() -->
> devm_delayed_work_autocancel())
> ---
> drivers/power/supply/Kconfig | 14 +
> drivers/power/supply/Makefile | 1 +
> drivers/power/supply/mt6370-charger.c | 961 ++++++++++++++++++++++++++++++++++
> 3 files changed, 976 insertions(+)
> create mode 100644 drivers/power/supply/mt6370-charger.c
>
> diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
> index 1aa8323..591deb8 100644
> --- a/drivers/power/supply/Kconfig
> +++ b/drivers/power/supply/Kconfig
> @@ -619,6 +619,20 @@ config CHARGER_MT6360
> Average Input Current Regulation, Battery Temperature Sensing,
> Over-Temperature Protection, DPDM Detection for BC1.2.
>
> +config CHARGER_MT6370
> + tristate "MediaTek MT6370 Charger Driver"
> + depends on MFD_MT6370
> + depends on REGULATOR
> + select LINEAR_RANGES
> + help
> + Say Y here to enable MT6370 Charger Part.
> + The device supports High-Accuracy Voltage/Current Regulation,
> + Average Input Current Regulation, Battery Temperature Sensing,
> + Over-Temperature Protection, DPDM Detection for BC1.2.
> +
> + This driver can also be built as a module. If so, the module
> + will be called "mt6370-charger".
> +
> config CHARGER_QCOM_SMBB
> tristate "Qualcomm Switch-Mode Battery Charger and Boost"
> depends on MFD_SPMI_PMIC || COMPILE_TEST
> diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
> index 7f02f36..8c95276 100644
> --- a/drivers/power/supply/Makefile
> +++ b/drivers/power/supply/Makefile
> @@ -82,6 +82,7 @@ obj-$(CONFIG_CHARGER_MAX8997) += max8997_charger.o
> obj-$(CONFIG_CHARGER_MAX8998) += max8998_charger.o
> obj-$(CONFIG_CHARGER_MP2629) += mp2629_charger.o
> obj-$(CONFIG_CHARGER_MT6360) += mt6360_charger.o
> +obj-$(CONFIG_CHARGER_MT6370) += mt6370-charger.o
> obj-$(CONFIG_CHARGER_QCOM_SMBB) += qcom_smbb.o
> obj-$(CONFIG_CHARGER_BQ2415X) += bq2415x_charger.o
> obj-$(CONFIG_CHARGER_BQ24190) += bq24190_charger.o
> diff --git a/drivers/power/supply/mt6370-charger.c b/drivers/power/supply/mt6370-charger.c
> new file mode 100644
> index 0000000..716cba2
> --- /dev/null
> +++ b/drivers/power/supply/mt6370-charger.c
> @@ -0,0 +1,961 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2022 Richtek Technology Corp.
> + *
> + * Author: ChiaEn Wu <chiaen_wu@...htek.com>
> + */
> +
> +#include <linux/bitfield.h>
> +#include <linux/bits.h>
> +#include <linux/devm-helpers.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/iio/consumer.h>
> +#include <linux/init.h>
> +#include <linux/interrupt.h>
> +#include <linux/kernel.h>
> +#include <linux/linear_range.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/platform_device.h>
> +#include <linux/power_supply.h>
> +#include <linux/regmap.h>
> +#include <linux/regulator/driver.h>
> +#include <linux/workqueue.h>
> +
> +#define MT6370_REG_CHG_CTRL1 0x111
> +#define MT6370_REG_CHG_CTRL2 0x112
> +#define MT6370_REG_CHG_CTRL3 0x113
> +#define MT6370_REG_CHG_CTRL4 0x114
> +#define MT6370_REG_CHG_CTRL5 0x115
> +#define MT6370_REG_CHG_CTRL6 0x116
> +#define MT6370_REG_CHG_CTRL7 0x117
> +#define MT6370_REG_CHG_CTRL8 0x118
> +#define MT6370_REG_CHG_CTRL9 0x119
> +#define MT6370_REG_CHG_CTRL10 0x11A
> +#define MT6370_REG_DEVICE_TYPE 0x122
> +#define MT6370_REG_USB_STATUS1 0x127
> +#define MT6370_REG_CHG_STAT 0x14A
> +#define MT6370_REG_FLED_EN 0x17E
> +#define MT6370_REG_CHG_STAT1 0X1D0
> +#define MT6370_REG_OVPCTRL_STAT 0x1D8
> +
> +#define MT6370_VOBST_MASK GENMASK(7, 2)
> +#define MT6370_OTG_PIN_EN_MASK BIT(1)
> +#define MT6370_OPA_MODE_MASK BIT(0)
> +#define MT6370_OTG_OC_MASK GENMASK(2, 0)
> +
> +#define MT6370_MIVR_IBUS_TH_100_mA 100000
> +#define MT6370_ADC_CHAN_IBUS 5
> +#define MT6370_ADC_CHAN_MAX 9
> +
> +enum mt6370_chg_reg_field {
> + /* MT6370_REG_CHG_CTRL2 */
> + F_IINLMTSEL, F_CFO_EN, F_CHG_EN,
> + /* MT6370_REG_CHG_CTRL3 */
> + F_IAICR, F_AICR_EN, F_ILIM_EN,
> + /* MT6370_REG_CHG_CTRL4 */
> + F_VOREG,
> + /* MT6370_REG_CHG_CTRL6 */
> + F_VMIVR,
> + /* MT6370_REG_CHG_CTRL7 */
> + F_ICHG,
> + /* MT6370_REG_CHG_CTRL8 */
> + F_IPREC,
> + /* MT6370_REG_CHG_CTRL9 */
> + F_IEOC,
> + /* MT6370_REG_DEVICE_TYPE */
> + F_USBCHGEN,
> + /* MT6370_REG_USB_STATUS1 */
> + F_USB_STAT, F_CHGDET,
> + /* MT6370_REG_CHG_STAT */
> + F_CHG_STAT, F_BOOST_STAT, F_VBAT_LVL,
> + /* MT6370_REG_FLED_EN */
> + F_FL_STROBE,
> + /* MT6370_REG_CHG_STAT1 */
> + F_CHG_MIVR_STAT,
> + /* MT6370_REG_OVPCTRL_STAT */
> + F_UVP_D_STAT,
> + F_MAX
> +};
> +
> +enum mt6370_irq {
> + MT6370_IRQ_ATTACH_I = 0,
> + MT6370_IRQ_UVP_D_EVT,
> + MT6370_IRQ_MIVR,
> + MT6370_IRQ_MAX
> +};
> +
> +struct mt6370_priv {
> + struct device *dev;
> + struct iio_channel *iio_adcs;
> + struct mutex attach_lock;
> + struct power_supply *psy;
> + struct regmap *regmap;
> + struct regmap_field *rmap_fields[F_MAX];
> + struct regulator_dev *rdev;
> + struct workqueue_struct *wq;
> + struct work_struct bc12_work;
> + struct delayed_work mivr_dwork;
> + unsigned int irq_nums[MT6370_IRQ_MAX];
> + int attach;
> + int psy_usb_type;
> + bool pwr_rdy;
> +};
> +
> +enum mt6370_usb_status {
> + MT6370_USB_STAT_NO_VBUS = 0,
> + MT6370_USB_STAT_VBUS_FLOW_IS_UNDER_GOING,
> + MT6370_USB_STAT_SDP,
> + MT6370_USB_STAT_SDP_NSTD,
> + MT6370_USB_STAT_DCP,
> + MT6370_USB_STAT_CDP,
> + MT6370_USB_STAT_MAX
> +};
> +
> +struct mt6370_chg_field {
> + const char *name;
> + const struct linear_range *range;
> + struct reg_field field;
> +};
> +
> +enum {
> + MT6370_RANGE_F_IAICR = 0,
> + MT6370_RANGE_F_VOREG,
> + MT6370_RANGE_F_VMIVR,
> + MT6370_RANGE_F_ICHG,
> + MT6370_RANGE_F_IPREC,
> + MT6370_RANGE_F_IEOC,
> + MT6370_RANGE_F_MAX
> +};
> +
> +static const struct linear_range mt6370_chg_ranges[MT6370_RANGE_F_MAX] = {
> + LINEAR_RANGE_IDX(MT6370_RANGE_F_IAICR, 100000, 0x0, 0x3F, 50000),
> + LINEAR_RANGE_IDX(MT6370_RANGE_F_VOREG, 3900000, 0x0, 0x51, 10000),
> + LINEAR_RANGE_IDX(MT6370_RANGE_F_VMIVR, 3900000, 0x0, 0x5F, 100000),
> + LINEAR_RANGE_IDX(MT6370_RANGE_F_ICHG, 900000, 0x08, 0x31, 100000),
> + LINEAR_RANGE_IDX(MT6370_RANGE_F_IPREC, 100000, 0x0, 0x0F, 50000),
> + LINEAR_RANGE_IDX(MT6370_RANGE_F_IEOC, 100000, 0x0, 0x0F, 50000),
> +};
> +
> +#define MT6370_CHG_FIELD(_fd, _reg, _lsb, _msb) \
> +[_fd] = { \
> + .name = #_fd, \
> + .range = NULL, \
> + .field = REG_FIELD(_reg, _lsb, _msb), \
> +}
> +
> +#define MT6370_CHG_FIELD_RANGE(_fd, _reg, _lsb, _msb) \
> +[_fd] = { \
> + .name = #_fd, \
> + .range = &mt6370_chg_ranges[MT6370_RANGE_##_fd], \
> + .field = REG_FIELD(_reg, _lsb, _msb), \
> +}
> +
> +static const struct mt6370_chg_field mt6370_chg_fields[F_MAX] = {
> + MT6370_CHG_FIELD(F_IINLMTSEL, MT6370_REG_CHG_CTRL2, 2, 3),
> + MT6370_CHG_FIELD(F_CFO_EN, MT6370_REG_CHG_CTRL2, 1, 1),
> + MT6370_CHG_FIELD(F_CHG_EN, MT6370_REG_CHG_CTRL2, 0, 0),
> + MT6370_CHG_FIELD_RANGE(F_IAICR, MT6370_REG_CHG_CTRL3, 2, 7),
> + MT6370_CHG_FIELD(F_AICR_EN, MT6370_REG_CHG_CTRL3, 1, 1),
> + MT6370_CHG_FIELD(F_ILIM_EN, MT6370_REG_CHG_CTRL3, 0, 0),
> + MT6370_CHG_FIELD_RANGE(F_VOREG, MT6370_REG_CHG_CTRL4, 1, 7),
> + MT6370_CHG_FIELD_RANGE(F_VMIVR, MT6370_REG_CHG_CTRL6, 1, 7),
> + MT6370_CHG_FIELD_RANGE(F_ICHG, MT6370_REG_CHG_CTRL7, 2, 7),
> + MT6370_CHG_FIELD_RANGE(F_IPREC, MT6370_REG_CHG_CTRL8, 0, 3),
> + MT6370_CHG_FIELD_RANGE(F_IEOC, MT6370_REG_CHG_CTRL9, 4, 7),
> + MT6370_CHG_FIELD(F_USBCHGEN, MT6370_REG_DEVICE_TYPE, 7, 7),
> + MT6370_CHG_FIELD(F_USB_STAT, MT6370_REG_USB_STATUS1, 4, 6),
> + MT6370_CHG_FIELD(F_CHGDET, MT6370_REG_USB_STATUS1, 3, 3),
> + MT6370_CHG_FIELD(F_CHG_STAT, MT6370_REG_CHG_STAT, 6, 7),
> + MT6370_CHG_FIELD(F_BOOST_STAT, MT6370_REG_CHG_STAT, 3, 3),
> + MT6370_CHG_FIELD(F_VBAT_LVL, MT6370_REG_CHG_STAT, 5, 5),
> + MT6370_CHG_FIELD(F_FL_STROBE, MT6370_REG_FLED_EN, 2, 2),
> + MT6370_CHG_FIELD(F_CHG_MIVR_STAT, MT6370_REG_CHG_STAT1, 6, 6),
> + MT6370_CHG_FIELD(F_UVP_D_STAT, MT6370_REG_OVPCTRL_STAT, 4, 4),
> +};
> +
> +static inline int mt6370_chg_field_get(struct mt6370_priv *priv,
> + enum mt6370_chg_reg_field fd,
> + unsigned int *val)
> +{
> + int ret;
> + unsigned int reg_val;
> +
> + ret = regmap_field_read(priv->rmap_fields[fd], ®_val);
> + if (ret)
> + return ret;
> +
> + if (mt6370_chg_fields[fd].range)
> + return linear_range_get_value(mt6370_chg_fields[fd].range,
> + reg_val, val);
> +
> + *val = reg_val;
> + return 0;
> +}
> +
> +static inline int mt6370_chg_field_set(struct mt6370_priv *priv,
> + enum mt6370_chg_reg_field fd,
> + unsigned int val)
> +{
> + int ret;
> + bool f;
> + const struct linear_range *r;
> +
> + if (mt6370_chg_fields[fd].range) {
> + r = mt6370_chg_fields[fd].range;
> +
> + if (fd == F_VMIVR) {
> + ret = linear_range_get_selector_high(r, val, &val, &f);
> + if (ret)
> + val = r->max_sel;
> + } else {
> + linear_range_get_selector_within(r, val, &val);
> + }
> + }
> +
> + return regmap_field_write(priv->rmap_fields[fd], val);
> +}
> +
> +enum {
> + MT6370_CHG_STAT_READY = 0,
> + MT6370_CHG_STAT_CHARGE_IN_PROGRESS,
> + MT6370_CHG_STAT_DONE,
> + MT6370_CHG_STAT_FAULT,
> + MT6370_CHG_STAT_MAX
> +};
> +
> +enum {
> + MT6370_ATTACH_STAT_DETACH = 0,
> + MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12,
> + MT6370_ATTACH_STAT_ATTACH_BC12_DONE,
> + MT6370_ATTACH_STAT_ATTACH_MAX
> +};
> +
> +static int mt6370_chg_otg_of_parse_cb(struct device_node *of,
> + const struct regulator_desc *rdesc,
> + struct regulator_config *rcfg)
> +{
> + struct mt6370_priv *priv = rcfg->driver_data;
> +
> + rcfg->ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(of),
> + "enable", 0, GPIOD_OUT_LOW |
> + GPIOD_FLAGS_BIT_NONEXCLUSIVE,
> + rdesc->name);
> + if (IS_ERR(rcfg->ena_gpiod)) {
> + rcfg->ena_gpiod = NULL;
> + return 0;
> + }
> +
> + return regmap_update_bits(priv->regmap, MT6370_REG_CHG_CTRL1,
> + MT6370_OTG_PIN_EN_MASK,
> + MT6370_OTG_PIN_EN_MASK);
> +}
> +
> +static void mt6370_chg_bc12_work_func(struct work_struct *work)
> +{
> + struct mt6370_priv *priv = container_of(work, struct mt6370_priv,
> + bc12_work);
> + int ret;
> + bool rpt_psy = false;
> + unsigned int attach, usb_stat;
> +
> + mutex_lock(&priv->attach_lock);
> + attach = priv->attach;
> +
> + switch (attach) {
> + case MT6370_ATTACH_STAT_DETACH:
> + usb_stat = 0;
> + break;
> + case MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12:
> + ret = mt6370_chg_field_set(priv, F_USBCHGEN, attach);
> + if (ret)
> + dev_err(priv->dev, "Failed to enable USB CHG EN\n");
> + goto bc12_work_func_out;
> + case MT6370_ATTACH_STAT_ATTACH_BC12_DONE:
> + ret = mt6370_chg_field_get(priv, F_USB_STAT, &usb_stat);
> + if (ret) {
> + dev_err(priv->dev, "Failed to get USB status\n");
> + goto bc12_work_func_out;
> + }
> + break;
> + default:
> + dev_err(priv->dev, "Invalid attach state\n");
> + goto bc12_work_func_out;
> + }
> +
> + rpt_psy = true;
> +
> + switch (usb_stat) {
> + case MT6370_USB_STAT_SDP:
> + case MT6370_USB_STAT_SDP_NSTD:
> + priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
> + break;
> + case MT6370_USB_STAT_DCP:
> + priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
> + break;
> + case MT6370_USB_STAT_CDP:
> + priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_CDP;
> + break;
> + case MT6370_USB_STAT_NO_VBUS:
> + case MT6370_USB_STAT_VBUS_FLOW_IS_UNDER_GOING:
> + default:
> + priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
> + break;
> + }
> +
> +bc12_work_func_out:
> + mutex_unlock(&priv->attach_lock);
> +
> + if (rpt_psy)
> + power_supply_changed(priv->psy);
> +}
> +
> +static int mt6370_chg_toggle_cfo(struct mt6370_priv *priv)
> +{
> + int ret;
> + unsigned int fl_strobe;
> +
> + /* check if flash led in strobe mode */
> + ret = mt6370_chg_field_get(priv, F_FL_STROBE, &fl_strobe);
> + if (ret) {
> + dev_err(priv->dev, "Failed to get FL_STROBE_EN\n");
> + return ret;
> + }
> +
> + if (fl_strobe) {
> + dev_err(priv->dev, "Flash led is still in strobe mode\n");
> + return ret;
> + }
> +
> + /* cfo off */
> + ret = mt6370_chg_field_set(priv, F_CFO_EN, 0);
> + if (ret) {
> + dev_err(priv->dev, "Failed to disable CFO_EN\n");
> + return ret;
> + }
> +
> + /* cfo on */
> + ret = mt6370_chg_field_set(priv, F_CFO_EN, 1);
> + if (ret)
> + dev_err(priv->dev, "Failed to enable CFO_EN\n");
> +
> + return ret;
> +}
> +
> +static int mt6370_chg_read_adc_chan(struct mt6370_priv *priv, unsigned int chan,
> + int *val)
> +{
> + int ret;
> +
> + if (chan >= MT6370_ADC_CHAN_MAX)
> + return -EINVAL;
> +
> + ret = iio_read_channel_processed(&priv->iio_adcs[chan], val);
> + if (ret)
> + dev_err(priv->dev, "Failed to read ADC\n");
> +
> + return ret;
> +}
> +
> +static void mt6370_chg_mivr_dwork_func(struct work_struct *work)
> +{
> + struct mt6370_priv *priv = container_of(work, struct mt6370_priv,
> + mivr_dwork.work);
> + int ret;
> + unsigned int mivr_stat, ibus;
> +
> + ret = mt6370_chg_field_get(priv, F_CHG_MIVR_STAT, &mivr_stat);
> + if (ret) {
> + dev_err(priv->dev, "Failed to get mivr state\n");
> + goto mivr_handler_out;
> + }
> +
> + if (!mivr_stat)
> + goto mivr_handler_out;
> +
> + ret = mt6370_chg_read_adc_chan(priv, MT6370_ADC_CHAN_IBUS, &ibus);
> + if (ret) {
> + dev_err(priv->dev, "Failed to get ibus\n");
> + goto mivr_handler_out;
> + }
> +
> + if (ibus < MT6370_MIVR_IBUS_TH_100_mA) {
> + ret = mt6370_chg_toggle_cfo(priv);
> + if (ret)
> + dev_err(priv->dev, "Failed to toggle cfo\n");
> + }
> +
> +mivr_handler_out:
> + enable_irq(priv->irq_nums[MT6370_IRQ_MIVR]);
> + pm_relax(priv->dev);
> +}
> +
> +static void mt6370_chg_pwr_rdy_check(struct mt6370_priv *priv)
> +{
> + int ret;
> + unsigned int opposite_pwr_rdy, otg_en;
> + union power_supply_propval val;
> +
> + /* Check in OTG mode or not */
> + ret = mt6370_chg_field_get(priv, F_BOOST_STAT, &otg_en);
> + if (ret) {
> + dev_err(priv->dev, "Failed to get OTG state\n");
> + return;
> + }
> +
> + if (otg_en)
> + return;
> +
> + ret = mt6370_chg_field_get(priv, F_UVP_D_STAT, &opposite_pwr_rdy);
> + if (ret) {
> + dev_err(priv->dev, "Failed to get opposite power ready state\n");
> + return;
> + }
> +
> + val.intval = opposite_pwr_rdy ?
> + MT6370_ATTACH_STAT_DETACH :
> + MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12;
> +
> + ret = power_supply_set_property(priv->psy, POWER_SUPPLY_PROP_ONLINE,
> + &val);
> + if (ret)
> + dev_err(priv->dev, "Failed to start attach/detach flow\n");
> +}
> +
> +static int mt6370_chg_get_online(struct mt6370_priv *priv,
> + union power_supply_propval *val)
> +{
> + mutex_lock(&priv->attach_lock);
> + val->intval = !!priv->attach;
> + mutex_unlock(&priv->attach_lock);
> +
> + return 0;
> +}
> +
> +static int mt6370_chg_get_status(struct mt6370_priv *priv,
> + union power_supply_propval *val)
> +{
> + int ret;
> + unsigned int chg_stat;
> + union power_supply_propval online;
> +
> + ret = power_supply_get_property(priv->psy, POWER_SUPPLY_PROP_ONLINE,
> + &online);
> + if (ret) {
> + dev_err(priv->dev, "Failed to get online status\n");
> + return ret;
> + }
> +
> + if (!online.intval) {
> + val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
> + return 0;
> + }
> +
> + ret = mt6370_chg_field_get(priv, F_CHG_STAT, &chg_stat);
> + if (ret)
> + return ret;
> +
> + switch (chg_stat) {
> + case MT6370_CHG_STAT_READY:
> + case MT6370_CHG_STAT_FAULT:
> + val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
> + return ret;
> + case MT6370_CHG_STAT_CHARGE_IN_PROGRESS:
> + val->intval = POWER_SUPPLY_STATUS_CHARGING;
> + return ret;
> + case MT6370_CHG_STAT_DONE:
> + val->intval = POWER_SUPPLY_STATUS_FULL;
> + return ret;
> + default:
> + val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
> + return ret;
> + }
> +}
> +
> +static int mt6370_chg_get_charge_type(struct mt6370_priv *priv,
> + union power_supply_propval *val)
> +{
> + int type, ret;
> + unsigned int chg_stat, vbat_lvl;
> +
> + ret = mt6370_chg_field_get(priv, F_CHG_STAT, &chg_stat);
> + if (ret)
> + return ret;
> +
> + ret = mt6370_chg_field_get(priv, F_VBAT_LVL, &vbat_lvl);
> + if (ret)
> + return ret;
> +
> + switch (chg_stat) {
> + case MT6370_CHG_STAT_CHARGE_IN_PROGRESS:
> + if (vbat_lvl)
> + type = POWER_SUPPLY_CHARGE_TYPE_FAST;
> + else
> + type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
> + break;
> + case MT6370_CHG_STAT_READY:
> + case MT6370_CHG_STAT_DONE:
> + case MT6370_CHG_STAT_FAULT:
> + default:
> + type = POWER_SUPPLY_CHARGE_TYPE_NONE;
> + break;
> + }
> +
> + val->intval = type;
> +
> + return 0;
> +}
> +
> +static int mt6370_chg_set_online(struct mt6370_priv *priv,
> + const union power_supply_propval *val)
> +{
> + bool pwr_rdy = !!val->intval;
> +
> + mutex_lock(&priv->attach_lock);
> + if (pwr_rdy == !!priv->attach) {
> + dev_err(priv->dev, "pwr_rdy is same(%d)\n", pwr_rdy);
> + mutex_unlock(&priv->attach_lock);
> + return 0;
> + }
> +
> + priv->attach = pwr_rdy;
> + mutex_unlock(&priv->attach_lock);
> +
> + if (!queue_work(priv->wq, &priv->bc12_work))
> + dev_err(priv->dev, "bc12 work has already queued\n");
> +
> + return 0;
> +}
> +
> +static int mt6370_chg_get_property(struct power_supply *psy,
> + enum power_supply_property psp,
> + union power_supply_propval *val)
> +{
> + struct mt6370_priv *priv = power_supply_get_drvdata(psy);
> +
> + switch (psp) {
> + case POWER_SUPPLY_PROP_ONLINE:
> + return mt6370_chg_get_online(priv, val);
> + case POWER_SUPPLY_PROP_STATUS:
> + return mt6370_chg_get_status(priv, val);
> + case POWER_SUPPLY_PROP_CHARGE_TYPE:
> + return mt6370_chg_get_charge_type(priv, val);
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
> + return mt6370_chg_field_get(priv, F_ICHG, &val->intval);
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
> + val->intval = linear_range_get_max_value(&mt6370_chg_ranges[MT6370_RANGE_F_ICHG]);
> + return 0;
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
> + return mt6370_chg_field_get(priv, F_VOREG, &val->intval);
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
> + val->intval = linear_range_get_max_value(&mt6370_chg_ranges[MT6370_RANGE_F_VOREG]);
> + return 0;
> + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
> + return mt6370_chg_field_get(priv, F_IAICR, &val->intval);
> + case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
> + return mt6370_chg_field_get(priv, F_VMIVR, &val->intval);
> + case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
> + return mt6370_chg_field_get(priv, F_IPREC, &val->intval);
> + case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
> + return mt6370_chg_field_get(priv, F_IEOC, &val->intval);
> + case POWER_SUPPLY_PROP_USB_TYPE:
> + val->intval = priv->psy_usb_type;
> + return 0;
> + default:
> + return -EINVAL;
> + }
> +}
> +
> +static int mt6370_chg_set_property(struct power_supply *psy,
> + enum power_supply_property psp,
> + const union power_supply_propval *val)
> +{
> + struct mt6370_priv *priv = power_supply_get_drvdata(psy);
> +
> + switch (psp) {
> + case POWER_SUPPLY_PROP_ONLINE:
> + return mt6370_chg_set_online(priv, val);
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
> + return mt6370_chg_field_set(priv, F_ICHG, val->intval);
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
> + return mt6370_chg_field_set(priv, F_VOREG, val->intval);
> + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
> + return mt6370_chg_field_set(priv, F_IAICR, val->intval);
> + case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
> + return mt6370_chg_field_set(priv, F_VMIVR, val->intval);
> + case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
> + return mt6370_chg_field_set(priv, F_IPREC, val->intval);
> + case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
> + return mt6370_chg_field_set(priv, F_IEOC, val->intval);
> + default:
> + return -EINVAL;
> + }
> +}
> +
> +static int mt6370_chg_property_is_writeable(struct power_supply *psy,
> + enum power_supply_property psp)
> +{
> + switch (psp) {
> + case POWER_SUPPLY_PROP_ONLINE:
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
> + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
> + case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
> + case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
> + case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
> + return 1;
> + default:
> + return 0;
> + }
> +}
> +
> +static enum power_supply_property mt6370_chg_properties[] = {
> + POWER_SUPPLY_PROP_ONLINE,
> + POWER_SUPPLY_PROP_STATUS,
> + POWER_SUPPLY_PROP_CHARGE_TYPE,
> + POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
> + POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
> + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
> + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
> + POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
> + POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
> + POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
> + POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
> + POWER_SUPPLY_PROP_USB_TYPE,
> +};
> +
> +static enum power_supply_usb_type mt6370_chg_usb_types[] = {
> + POWER_SUPPLY_USB_TYPE_UNKNOWN,
> + POWER_SUPPLY_USB_TYPE_SDP,
> + POWER_SUPPLY_USB_TYPE_CDP,
> + POWER_SUPPLY_USB_TYPE_DCP,
> +};
> +
> +static const struct power_supply_desc mt6370_chg_psy_desc = {
> + .name = "mt6370-charger",
> + .type = POWER_SUPPLY_TYPE_USB,
> + .properties = mt6370_chg_properties,
> + .num_properties = ARRAY_SIZE(mt6370_chg_properties),
> + .get_property = mt6370_chg_get_property,
> + .set_property = mt6370_chg_set_property,
> + .property_is_writeable = mt6370_chg_property_is_writeable,
> + .usb_types = mt6370_chg_usb_types,
> + .num_usb_types = ARRAY_SIZE(mt6370_chg_usb_types),
> +};
> +
> +static const struct regulator_ops mt6370_chg_otg_ops = {
> + .list_voltage = regulator_list_voltage_linear,
> + .enable = regulator_enable_regmap,
> + .disable = regulator_disable_regmap,
> + .is_enabled = regulator_is_enabled_regmap,
> + .set_voltage_sel = regulator_set_voltage_sel_regmap,
> + .get_voltage_sel = regulator_get_voltage_sel_regmap,
> + .set_current_limit = regulator_set_current_limit_regmap,
> + .get_current_limit = regulator_get_current_limit_regmap,
> +};
> +
> +static const u32 mt6370_chg_otg_oc_ma[] = {
> + 500000, 700000, 1100000, 1300000, 1800000, 2100000, 2400000,
> +};
> +
> +static const struct regulator_desc mt6370_chg_otg_rdesc = {
> + .of_match = "usb-otg-vbus-regulator",
> + .of_parse_cb = mt6370_chg_otg_of_parse_cb,
> + .name = "mt6370-usb-otg-vbus",
> + .ops = &mt6370_chg_otg_ops,
> + .owner = THIS_MODULE,
> + .type = REGULATOR_VOLTAGE,
> + .min_uV = 4425000,
> + .uV_step = 25000,
> + .n_voltages = 57,
> + .vsel_reg = MT6370_REG_CHG_CTRL5,
> + .vsel_mask = MT6370_VOBST_MASK,
> + .enable_reg = MT6370_REG_CHG_CTRL1,
> + .enable_mask = MT6370_OPA_MODE_MASK,
> + .curr_table = mt6370_chg_otg_oc_ma,
> + .n_current_limits = ARRAY_SIZE(mt6370_chg_otg_oc_ma),
> + .csel_reg = MT6370_REG_CHG_CTRL10,
> + .csel_mask = MT6370_OTG_OC_MASK,
> +};
> +
> +static int mt6370_chg_init_rmap_fields(struct mt6370_priv *priv)
> +{
> + int i;
> + const struct mt6370_chg_field *fds = mt6370_chg_fields;
> +
> + for (i = 0; i < F_MAX; i++) {
> + priv->rmap_fields[i] = devm_regmap_field_alloc(priv->dev,
> + priv->regmap,
> + fds[i].field);
> + if (IS_ERR(priv->rmap_fields[i]))
> + return dev_err_probe(priv->dev,
> + PTR_ERR(priv->rmap_fields[i]),
> + "Failed to allocate regmapfield[%s]\n",
> + fds[i].name);
> + }
> +
> + return 0;
> +}
> +
> +static int mt6370_chg_init_setting(struct mt6370_priv *priv)
> +{
> + int ret;
> +
> + /* Disable usb_chg_en */
> + ret = mt6370_chg_field_set(priv, F_USBCHGEN, 0);
> + if (ret) {
> + dev_err(priv->dev, "Failed to disable usb_chg_en\n");
> + return ret;
> + }
> +
> + /* Disable input current limit */
> + ret = mt6370_chg_field_set(priv, F_ILIM_EN, 0);
> + if (ret) {
> + dev_err(priv->dev, "Failed to disable input current limit\n");
> + return ret;
> + }
> +
> + /* ICHG/IEOC Workaround, ICHG can not be set less than 900mA */
> + ret = mt6370_chg_field_set(priv, F_ICHG, 900000);
> + if (ret) {
> + dev_err(priv->dev, "Failed to set ICHG to 900mA");
> + return ret;
> + }
> +
> + /* Change input current limit selection to using IAICR results */
> + ret = mt6370_chg_field_set(priv, F_IINLMTSEL, 2);
> + if (ret) {
> + dev_err(priv->dev, "Failed to set IINLMTSEL\n");
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +#define MT6370_CHG_DT_PROP_DECL(_name, _type, _field) \
> +{ \
> + .name = "mediatek,chg-" #_name, \
> + .type = MT6370_PARSE_TYPE_##_type, \
> + .fd = _field, \
> +}
> +
> +static int mt6370_chg_init_otg_regulator(struct mt6370_priv *priv)
> +{
> + struct regulator_config rcfg = {
> + .dev = priv->dev,
> + .regmap = priv->regmap,
> + .driver_data = priv,
> + };
> +
> + priv->rdev = devm_regulator_register(priv->dev, &mt6370_chg_otg_rdesc,
> + &rcfg);
> +
> + return PTR_ERR_OR_ZERO(priv->rdev);
> +}
> +
> +static int mt6370_chg_init_psy(struct mt6370_priv *priv)
> +{
> + struct power_supply_config cfg = {
> + .drv_data = priv,
> + .of_node = dev_of_node(priv->dev),
> + };
> +
> + priv->psy = devm_power_supply_register(priv->dev, &mt6370_chg_psy_desc,
> + &cfg);
> +
> + return PTR_ERR_OR_ZERO(priv->psy);
> +}
> +
> +static void mt6370_chg_destroy_attach_lock(void *data)
> +{
> + struct mutex *attach_lock = data;
> +
> + mutex_destroy(attach_lock);
> +}
> +
> +static void mt6370_chg_destroy_wq(void *data)
> +{
> + struct workqueue_struct *wq = data;
> +
> + flush_workqueue(wq);
> + destroy_workqueue(wq);
> +}
> +
> +static irqreturn_t mt6370_attach_i_handler(int irq, void *data)
> +{
> + struct mt6370_priv *priv = data;
> + unsigned int otg_en;
> + int ret;
> +
> + /* Check in OTG mode or not */
> + ret = mt6370_chg_field_get(priv, F_BOOST_STAT, &otg_en);
> + if (ret) {
> + dev_err(priv->dev, "Failed to get OTG state\n");
> + return IRQ_NONE;
> + }
> +
> + if (otg_en)
> + return IRQ_HANDLED;
> +
> + mutex_lock(&priv->attach_lock);
> + priv->attach = MT6370_ATTACH_STAT_ATTACH_BC12_DONE;
> + mutex_unlock(&priv->attach_lock);
> +
> + if (!queue_work(priv->wq, &priv->bc12_work))
> + dev_err(priv->dev, "bc12 work has already queued\n");
> +
> + return IRQ_HANDLED;
> +}
> +
> +static irqreturn_t mt6370_uvp_d_evt_handler(int irq, void *data)
> +{
> + struct mt6370_priv *priv = data;
> +
> + mt6370_chg_pwr_rdy_check(priv);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static irqreturn_t mt6370_mivr_handler(int irq, void *data)
> +{
> + struct mt6370_priv *priv = data;
> +
> + pm_stay_awake(priv->dev);
> + disable_irq_nosync(priv->irq_nums[MT6370_IRQ_MIVR]);
> + schedule_delayed_work(&priv->mivr_dwork, msecs_to_jiffies(200));
> +
> + return IRQ_HANDLED;
> +}
> +
> +#define MT6370_CHG_IRQ(_name) \
> +{ \
> + .name = #_name, \
> + .handler = mt6370_##_name##_handler, \
> +}
> +
> +static int mt6370_chg_init_irq(struct mt6370_priv *priv)
> +{
> + int i, ret;
> + const struct {
> + char *name;
> + irq_handler_t handler;
> + } mt6370_chg_irqs[] = {
> + MT6370_CHG_IRQ(attach_i),
> + MT6370_CHG_IRQ(uvp_d_evt),
> + MT6370_CHG_IRQ(mivr),
> + };
> +
> + for (i = 0; i < ARRAY_SIZE(mt6370_chg_irqs); i++) {
> + ret = platform_get_irq_byname(to_platform_device(priv->dev),
> + mt6370_chg_irqs[i].name);
> + if (ret < 0)
> + return dev_err_probe(priv->dev, ret,
> + "Failed to get irq %s\n",
> + mt6370_chg_irqs[i].name);
> +
> + priv->irq_nums[i] = ret;
> + ret = devm_request_threaded_irq(priv->dev, ret, NULL,
> + mt6370_chg_irqs[i].handler,
> + IRQF_TRIGGER_FALLING,
> + dev_name(priv->dev), priv);
> + if (ret)
> + return dev_err_probe(priv->dev, ret,
> + "Failed to request irq %s\n",
> + mt6370_chg_irqs[i].name);
> + }
> +
> + return 0;
> +}
> +
> +static int mt6370_chg_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct mt6370_priv *priv;
> + int ret;
> +
> + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> + if (!priv)
> + return -ENOMEM;
> +
> + priv->dev = &pdev->dev;
> +
> + priv->regmap = dev_get_regmap(pdev->dev.parent, NULL);
> + if (!priv->regmap)
> + return dev_err_probe(dev, -ENODEV, "Failed to get regmap\n");
> +
> + ret = mt6370_chg_init_rmap_fields(priv);
> + if (ret)
> + return dev_err_probe(dev, ret, "Failed to init regmap fields\n");
> +
> + platform_set_drvdata(pdev, priv);
> +
> + priv->iio_adcs = devm_iio_channel_get_all(priv->dev);
> + if (IS_ERR(priv->iio_adcs))
> + return dev_err_probe(dev, PTR_ERR(priv->iio_adcs),
> + "Failed to get iio adc\n");
> +
> + ret = mt6370_chg_init_otg_regulator(priv);
> + if (ret)
> + return dev_err_probe(dev, ret, "Failed to init OTG regulator\n");
> +
> + ret = mt6370_chg_init_psy(priv);
> + if (ret)
> + return dev_err_probe(dev, ret, "Failed to init psy\n");
> +
> + mutex_init(&priv->attach_lock);
> + ret = devm_add_action_or_reset(dev, mt6370_chg_destroy_attach_lock,
> + &priv->attach_lock);
> + if (ret)
> + return dev_err_probe(dev, ret, "Failed to init attach lock\n");
> +
> + priv->attach = MT6370_ATTACH_STAT_DETACH;
> +
> + priv->wq = create_singlethread_workqueue(dev_name(priv->dev));
> + if (IS_ERR(priv->wq))
> + return dev_err_probe(dev, PTR_ERR(priv->wq),
> + "Failed to create workqueue\n");
> +
> + ret = devm_add_action_or_reset(dev, mt6370_chg_destroy_wq, priv->wq);
> + if (ret)
> + return dev_err_probe(dev, ret, "Failed to init wq\n");
> +
> + ret = devm_work_autocancel(dev, &priv->bc12_work, mt6370_chg_bc12_work_func);
> + if (ret)
> + return dev_err_probe(dev, ret, "Failed to init bc12 work\n");
> +
> + ret = devm_delayed_work_autocancel(dev, &priv->mivr_dwork, mt6370_chg_mivr_dwork_func);
> + if (ret)
> + return dev_err_probe(dev, ret, "Failed to init mivr delayed work\n");
> +
> + ret = mt6370_chg_init_setting(priv);
> + if (ret)
> + return dev_err_probe(dev, ret,
> + "Failed to init mt6370 charger setting\n");
> +
> + ret = mt6370_chg_init_irq(priv);
> + if (ret)
> + return ret;
> +
> + mt6370_chg_pwr_rdy_check(priv);
> +
> + return 0;
> +}
> +
> +static const struct of_device_id mt6370_chg_of_match[] = {
> + { .compatible = "mediatek,mt6370-charger", },
> + {}
> +};
> +MODULE_DEVICE_TABLE(of, mt6370_chg_of_match);
> +
> +static struct platform_driver mt6370_chg_driver = {
> + .probe = mt6370_chg_probe,
> + .driver = {
> + .name = "mt6370-charger",
> + .of_match_table = mt6370_chg_of_match,
> + },
> +};
> +module_platform_driver(mt6370_chg_driver);
> +
> +MODULE_AUTHOR("ChiaEn Wu <chiaen_wu@...htek.com>");
> +MODULE_DESCRIPTION("MediaTek MT6370 Charger Driver");
> +MODULE_LICENSE("GPL v2");
> --
> 2.7.4
>
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