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Subject[PATCH v3 11/14] power: supply: mt6370: Add Mediatek MT6370 charger driver
Date
From: ChiaEn Wu <chiaen_wu@richtek.com>

Add Mediatek MT6370 charger driver.

Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
---
drivers/power/supply/Kconfig | 11 +
drivers/power/supply/Makefile | 1 +
drivers/power/supply/mt6370-charger.c | 1132 +++++++++++++++++++++++++++++++++
3 files changed, 1144 insertions(+)
create mode 100644 drivers/power/supply/mt6370-charger.c

diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index 1aa8323..54d8c3a 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -619,6 +619,17 @@ 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.
+
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..539da62d
--- /dev/null
+++ b/drivers/power/supply/mt6370-charger.c
@@ -0,0 +1,1132 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <dt-bindings/iio/adc/mediatek,mt6370_adc.h>
+#include <linux/atomic.h>
+#include <linux/bitfield.h>
+#include <linux/bits.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/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 100000 /* 100 mA */
+
+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_CTRL5 */
+ F_VOBST,
+ /* 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,
+};
+
+struct mt6370_priv {
+ struct device *dev;
+ struct iio_channel *iio_adcs;
+ struct mutex attach_lock;
+ struct power_supply *psy;
+ struct power_supply_desc *psy_desc;
+ 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;
+ atomic_t 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_range {
+ u32 min;
+ u32 max;
+ u16 step;
+ u8 offset;
+ const u32 *table;
+ u16 num_table;
+ bool round_up;
+};
+
+struct mt6370_chg_field {
+ const char *name;
+ const struct mt6370_chg_range *range;
+ struct reg_field field;
+};
+
+static const u32 mt6370_chg_otg_oc_ma[] = {
+ 500000, 700000, 1100000, 1300000, 1800000, 2100000, 2400000,
+};
+
+#define MT6370_CHG_RANGE(_min, _max, _step, _offset, _ru) \
+{ \
+ .min = _min, \
+ .max = _max, \
+ .step = _step, \
+ .offset = _offset, \
+ .round_up = _ru, \
+}
+
+#define MT6370_CHG_RANGE_T(_table, _ru) \
+{ \
+ .table = _table, \
+ .num_table = ARRAY_SIZE(_table), \
+ .round_up = _ru, \
+}
+
+static const struct mt6370_chg_range mt6370_chg_ranges[F_MAX] = {
+ [F_IAICR] = MT6370_CHG_RANGE(100, 3250, 50, 0, false),
+ [F_VOREG] = MT6370_CHG_RANGE(3900, 4710, 10, 0, false),
+ [F_VOBST] = MT6370_CHG_RANGE(4425, 5825, 25, 0, false),
+ [F_VMIVR] = MT6370_CHG_RANGE(3900, 13400, 100, 0, true),
+ [F_ICHG] = MT6370_CHG_RANGE(900, 5000, 100, 8, false),
+ [F_IPREC] = MT6370_CHG_RANGE(100, 850, 50, 0, false),
+ [F_IEOC] = MT6370_CHG_RANGE(100, 850, 50, 0, false),
+};
+
+#define MT6370_CHG_FIELD_RANGE(_fd, _reg, _lsb, _msb, _range) \
+[_fd] = { \
+ .name = #_fd, \
+ .range = _range ? &mt6370_chg_ranges[_fd] : NULL, \
+ .field = REG_FIELD(_reg, _lsb, _msb), \
+}
+
+#define MT6370_CHG_FIELD(_fd, _reg, _lsb, _msb) \
+ MT6370_CHG_FIELD_RANGE(_fd, _reg, _lsb, _msb, (_msb > _lsb))
+
+static const struct mt6370_chg_field mt6370_chg_fields[F_MAX] = {
+ MT6370_CHG_FIELD_RANGE(F_IINLMTSEL, MT6370_REG_CHG_CTRL2, 2, 3, false),
+ 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(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(F_VOREG, MT6370_REG_CHG_CTRL4, 1, 7),
+ MT6370_CHG_FIELD(F_VOBST, MT6370_REG_CHG_CTRL5, 2, 7),
+ MT6370_CHG_FIELD(F_VMIVR, MT6370_REG_CHG_CTRL6, 1, 7),
+ MT6370_CHG_FIELD(F_ICHG, MT6370_REG_CHG_CTRL7, 2, 7),
+ MT6370_CHG_FIELD(F_IPREC, MT6370_REG_CHG_CTRL8, 0, 3),
+ MT6370_CHG_FIELD(F_IEOC, MT6370_REG_CHG_CTRL9, 4, 7),
+ MT6370_CHG_FIELD(F_USBCHGEN, MT6370_REG_DEVICE_TYPE, 7, 7),
+ MT6370_CHG_FIELD_RANGE(F_USB_STAT, MT6370_REG_USB_STATUS1, 4, 6, false),
+ MT6370_CHG_FIELD(F_CHGDET, MT6370_REG_USB_STATUS1, 3, 3),
+ MT6370_CHG_FIELD_RANGE(F_CHG_STAT, MT6370_REG_CHG_STAT, 6, 7, false),
+ 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 u32 mt6370_chg_val_to_reg(const struct mt6370_chg_range *range,
+ u32 val)
+{
+ int i;
+ u8 reg;
+
+ if (!range)
+ return val;
+
+ if (range->table) {
+ if (val <= range->table[0])
+ return 0;
+
+ for (i = 1; i < range->num_table - 1; i++) {
+ if (val == range->table[i])
+ return i;
+ if (val > range->table[i] &&
+ val < range->table[i + 1])
+ return range->round_up ? i + 1 : i;
+ }
+
+ return range->num_table - 1;
+ }
+
+ if (val <= range->min)
+ reg = 0;
+ else if (val >= range->max)
+ reg = (range->max - range->min) / range->step;
+ else if (range->round_up)
+ reg = DIV_ROUND_UP(val - range->min, range->step);
+ else
+ reg = (val - range->min) / range->step;
+
+ return reg + range->offset;
+}
+
+static inline u32 mt6370_chg_reg_to_val(const struct mt6370_chg_range *range,
+ u8 reg)
+{
+ if (!range)
+ return reg;
+
+ return range->table ? range->table[reg] :
+ range->min + range->step * (reg - range->offset);
+}
+
+static inline int mt6370_chg_field_get(struct mt6370_priv *priv,
+ enum mt6370_chg_reg_field fd, u32 *val)
+{
+ int ret;
+ u32 reg_val;
+
+ ret = regmap_field_read(priv->rmap_fields[fd], &reg_val);
+ if (ret < 0)
+ return ret;
+
+ *val = mt6370_chg_reg_to_val(mt6370_chg_fields[fd].range, reg_val);
+
+ return 0;
+}
+
+static inline int mt6370_chg_field_set(struct mt6370_priv *priv,
+ enum mt6370_chg_reg_field fd, u32 val)
+{
+ val = mt6370_chg_val_to_reg(mt6370_chg_fields[fd].range, 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_BC12_NOT_DONE,
+ 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;
+ unsigned int val;
+ int ret = 0;
+
+ 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)) {
+ dev_err(priv->dev, "Failed to requeset OTG EN Pin\n");
+ rcfg->ena_gpiod = NULL;
+ } else {
+ val = MT6370_OPA_MODE_MASK | MT6370_OTG_PIN_EN_MASK;
+ ret = regmap_update_bits(priv->regmap, MT6370_REG_CHG_CTRL1,
+ val, val);
+ if (ret)
+ dev_err(priv->dev, "Failed to set otg bits\n");
+ }
+
+ return ret;
+}
+
+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, attach;
+ bool rpt_psy = false;
+ u32 usb_stat;
+
+ mutex_lock(&priv->attach_lock);
+ attach = atomic_read(&priv->attach);
+
+ switch (attach) {
+ case MT6370_ATTACH_STAT_DETACH:
+ usb_stat = 0;
+ break;
+ case MT6370_ATTACH_STAT_ATTACH_BC12_DONE:
+ ret = mt6370_chg_field_get(priv, F_USB_STAT, &usb_stat);
+ if (ret < 0) {
+ dev_err(priv->dev, "Failed to get USB status\n");
+ goto bc12_work_func_out;
+ }
+ break;
+ case MT6370_ATTACH_STAT_ATTACH_BC12_NOT_DONE:
+ ret = mt6370_chg_field_set(priv, F_USBCHGEN, attach);
+ if (ret < 0)
+ dev_err(priv->dev, "Failed to enable USB CHG EN\n");
+ goto bc12_work_func_out;
+ 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:
+ priv->psy_desc->type = POWER_SUPPLY_TYPE_USB;
+ priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
+ break;
+ case MT6370_USB_STAT_SDP_NSTD:
+ priv->psy_desc->type = POWER_SUPPLY_TYPE_USB;
+ priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
+ break;
+ case MT6370_USB_STAT_DCP:
+ priv->psy_desc->type = POWER_SUPPLY_TYPE_USB_DCP;
+ priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
+ break;
+ case MT6370_USB_STAT_CDP:
+ priv->psy_desc->type = POWER_SUPPLY_TYPE_USB_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_desc->type = POWER_SUPPLY_TYPE_USB;
+ 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 inline void mt6370_chg_enable_irq(struct mt6370_priv *priv,
+ const char *irq_name, bool en)
+{
+ int irq_num;
+ struct platform_device *pdev = to_platform_device(priv->dev);
+
+ irq_num = platform_get_irq_byname(pdev, irq_name);
+
+ if (irq_num < 0) {
+ dev_err(priv->dev, "Failed to get platform resource\n");
+ } else {
+ if (en)
+ enable_irq(irq_num);
+ else
+ disable_irq_nosync(irq_num);
+ }
+}
+
+static int mt6370_chg_toggle_cfo(struct mt6370_priv *priv)
+{
+ int ret;
+ u32 fl_strobe;
+
+ /* check if flash led in strobe mode */
+ ret = mt6370_chg_field_get(priv, F_FL_STROBE, &fl_strobe);
+ if (ret < 0) {
+ dev_err(priv->dev, "Failed to get FL_STROBE_EN\n");
+ goto toggle_cfo_exit;
+ }
+
+ if (fl_strobe) {
+ dev_err(priv->dev, "Flash led is still in strobe mode\n");
+ goto toggle_cfo_exit;
+ }
+
+ /* cfo off */
+ ret = mt6370_chg_field_set(priv, F_CFO_EN, 0);
+ if (ret < 0) {
+ dev_err(priv->dev, "Failed to disable CFO_EN\n");
+ goto toggle_cfo_exit;
+ }
+
+ /* cfo on */
+ ret = mt6370_chg_field_set(priv, F_CFO_EN, 1);
+ if (ret < 0) {
+ dev_err(priv->dev, "Failed to enable CFO_EN\n");
+ goto toggle_cfo_exit;
+ }
+
+toggle_cfo_exit:
+ return ret;
+}
+
+static int mt6370_chg_read_adc_chan(struct mt6370_priv *priv, unsigned int chan,
+ int *val)
+{
+ int ret;
+
+ if (chan >= MT6370_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;
+ u32 mivr_stat;
+ unsigned int ibus;
+
+ ret = mt6370_chg_field_get(priv, F_CHG_MIVR_STAT, &mivr_stat);
+ if (ret < 0) {
+ 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_CHAN_IBUS, &ibus);
+ if (ret) {
+ dev_err(priv->dev, "Failed to get ibus\n");
+ goto mivr_handler_out;
+ }
+
+ if (ibus < MT6370_MIVR_IBUS_TH) {
+ ret = mt6370_chg_toggle_cfo(priv);
+ if (ret)
+ dev_err(priv->dev, "Failed to toggle cfo\n");
+ }
+
+mivr_handler_out:
+ mt6370_chg_enable_irq(priv, "mivr", true);
+ pm_relax(priv->dev);
+}
+
+static void mt6370_chg_pwr_rdy_check(struct mt6370_priv *priv)
+{
+ int ret;
+ u32 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 < 0) {
+ 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, &pwr_rdy);
+ if (ret < 0) {
+ dev_err(priv->dev, "Failed to get pwr_rdy state reg\n");
+ return;
+ }
+
+ val.intval = !pwr_rdy;
+
+ 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 = !!atomic_read(&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;
+ u32 chg_stat;
+
+ ret = mt6370_chg_get_online(priv, val);
+ if (!val->intval) {
+ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+ return 0;
+ }
+
+ ret = mt6370_chg_field_get(priv, F_CHG_STAT, &chg_stat);
+ if (ret < 0)
+ return ret;
+
+ switch (chg_stat) {
+ case MT6370_CHG_STAT_READY:
+ case MT6370_CHG_STAT_FAULT:
+ val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ break;
+ case MT6370_CHG_STAT_CHARGE_IN_PROGRESS:
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ break;
+ case MT6370_CHG_STAT_DONE:
+ val->intval = POWER_SUPPLY_STATUS_FULL;
+ break;
+ default:
+ val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
+ break;
+ }
+
+ return ret;
+}
+
+static int mt6370_chg_get_charge_type(struct mt6370_priv *priv,
+ union power_supply_propval *val)
+{
+ int type, ret;
+ u32 chg_stat, vbat_lvl;
+
+ ret = mt6370_chg_field_get(priv, F_CHG_STAT, &chg_stat);
+ if (ret < 0)
+ return ret;
+
+ ret = mt6370_chg_field_get(priv, F_VBAT_LVL, &vbat_lvl);
+ if (ret < 0)
+ 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_get_ichg(struct mt6370_priv *priv,
+ union power_supply_propval *val)
+{
+ return mt6370_chg_field_get(priv, F_ICHG, &val->intval);
+}
+
+static int mt6370_chg_get_max_ichg(struct mt6370_priv *priv,
+ union power_supply_propval *val)
+{
+ return mt6370_chg_ranges[F_ICHG].max;
+}
+
+static int mt6370_chg_get_cv(struct mt6370_priv *priv,
+ union power_supply_propval *val)
+{
+ return mt6370_chg_field_get(priv, F_VOREG, &val->intval);
+}
+
+static int mt6370_chg_get_max_cv(struct mt6370_priv *priv,
+ union power_supply_propval *val)
+{
+ return mt6370_chg_ranges[F_VOREG].max;
+}
+
+static int mt6370_chg_get_aicr(struct mt6370_priv *priv,
+ union power_supply_propval *val)
+{
+ return mt6370_chg_field_get(priv, F_IAICR, &val->intval);
+}
+
+static int mt6370_chg_get_mivr(struct mt6370_priv *priv,
+ union power_supply_propval *val)
+{
+ return mt6370_chg_field_get(priv, F_VMIVR, &val->intval);
+}
+
+static int mt6370_chg_get_iprechg(struct mt6370_priv *priv,
+ union power_supply_propval *val)
+{
+ return mt6370_chg_field_get(priv, F_IPREC, &val->intval);
+}
+
+static int mt6370_chg_get_ieoc(struct mt6370_priv *priv,
+ union power_supply_propval *val)
+{
+ return mt6370_chg_field_get(priv, F_IEOC, &val->intval);
+}
+
+static int mt6370_chg_set_online(struct mt6370_priv *priv,
+ const union power_supply_propval *val)
+{
+ int attach;
+ u32 pwr_rdy = !!val->intval;
+
+ mutex_lock(&priv->attach_lock);
+ attach = atomic_read(&priv->attach);
+ if (pwr_rdy == !!attach) {
+ dev_err(priv->dev, "pwr_rdy is same(%d)\n", pwr_rdy);
+ mutex_unlock(&priv->attach_lock);
+ return 0;
+ }
+
+ atomic_set(&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_set_ichg(struct mt6370_priv *priv,
+ const union power_supply_propval *val)
+{
+ return mt6370_chg_field_set(priv, F_ICHG, val->intval);
+}
+
+static int mt6370_chg_set_cv(struct mt6370_priv *priv,
+ const union power_supply_propval *val)
+{
+ return mt6370_chg_field_set(priv, F_VOREG, val->intval);
+}
+
+static int mt6370_chg_set_aicr(struct mt6370_priv *priv,
+ const union power_supply_propval *val)
+{
+ return mt6370_chg_field_set(priv, F_IAICR, val->intval);
+}
+
+static int mt6370_chg_set_mivr(struct mt6370_priv *priv,
+ const union power_supply_propval *val)
+{
+ return mt6370_chg_field_set(priv, F_VMIVR, val->intval);
+}
+
+static int mt6370_chg_set_iprechg(struct mt6370_priv *priv,
+ const union power_supply_propval *val)
+{
+ return mt6370_chg_field_set(priv, F_IPREC, val->intval);
+}
+
+static int mt6370_chg_set_ieoc(struct mt6370_priv *priv,
+ const union power_supply_propval *val)
+{
+ return mt6370_chg_field_set(priv, F_IEOC, val->intval);
+}
+
+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);
+ int ret = 0;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ ret = mt6370_chg_get_online(priv, val);
+ break;
+ case POWER_SUPPLY_PROP_STATUS:
+ ret = mt6370_chg_get_status(priv, val);
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_TYPE:
+ ret = mt6370_chg_get_charge_type(priv, val);
+ break;
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+ ret = mt6370_chg_get_ichg(priv, val);
+ break;
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+ ret = mt6370_chg_get_max_ichg(priv, val);
+ break;
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ ret = mt6370_chg_get_cv(priv, val);
+ break;
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+ ret = mt6370_chg_get_max_cv(priv, val);
+ break;
+ case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+ ret = mt6370_chg_get_aicr(priv, val);
+ break;
+ case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
+ ret = mt6370_chg_get_mivr(priv, val);
+ break;
+ case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+ ret = mt6370_chg_get_iprechg(priv, val);
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+ ret = mt6370_chg_get_ieoc(priv, val);
+ break;
+ case POWER_SUPPLY_PROP_TYPE:
+ val->intval = priv->psy_desc->type;
+ break;
+ case POWER_SUPPLY_PROP_USB_TYPE:
+ val->intval = priv->psy_usb_type;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+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);
+ int ret;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ ret = mt6370_chg_set_online(priv, val);
+ break;
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+ ret = mt6370_chg_set_ichg(priv, val);
+ break;
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ ret = mt6370_chg_set_cv(priv, val);
+ break;
+ case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+ ret = mt6370_chg_set_aicr(priv, val);
+ break;
+ case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
+ ret = mt6370_chg_set_mivr(priv, val);
+ break;
+ case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+ ret = mt6370_chg_set_iprechg(priv, val);
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+ ret = mt6370_chg_set_ieoc(priv, val);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ return ret;
+}
+
+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_TYPE,
+ 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 struct power_supply_desc mt6370_chg_psy_desc = {
+ .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 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])) {
+ dev_err(priv->dev,
+ "Failed to allocate regmap field [%s]\n",
+ fds[i].name);
+ return PTR_ERR(priv->rmap_fields[i]);
+ }
+ }
+
+ return 0;
+}
+
+static int mt6370_chg_init_setting(struct mt6370_priv *priv)
+{
+ int ret;
+
+ priv->wq = create_singlethread_workqueue(dev_name(priv->dev));
+ if (IS_ERR(priv->wq)) {
+ dev_err(priv->dev, "Failed to create workqueue\n");
+ return PTR_ERR(priv->wq);
+ }
+
+ INIT_WORK(&priv->bc12_work, mt6370_chg_bc12_work_func);
+ INIT_DELAYED_WORK(&priv->mivr_dwork, mt6370_chg_mivr_dwork_func);
+ mutex_init(&priv->attach_lock);
+ atomic_set(&priv->attach, 0);
+
+ /* Disable usb_chg_en */
+ ret = mt6370_chg_field_set(priv, F_USBCHGEN, 0);
+ if (ret < 0) {
+ dev_err(priv->dev, "Failed to disable usb_chg_en\n");
+ return ret;
+ }
+
+ /* ICHG/IEOC Workaroud, ICHG can not be set less than 900mA */
+ ret = mt6370_chg_field_set(priv, F_ICHG, 900);
+ if (ret < 0) {
+ 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, 3);
+ if (ret < 0) {
+ 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 IS_ERR(priv->rdev) ? PTR_ERR(priv->rdev) : 0;
+}
+
+static int mt6370_chg_init_psy(struct mt6370_priv *priv)
+{
+ struct power_supply_config cfg = {
+ .drv_data = priv,
+ .of_node = priv->dev->of_node,
+ };
+
+ priv->psy_desc = &mt6370_chg_psy_desc;
+ priv->psy_desc->name = dev_name(priv->dev);
+ priv->psy = devm_power_supply_register(priv->dev, priv->psy_desc, &cfg);
+
+ return IS_ERR(priv->psy) ? PTR_ERR(priv->psy) : 0;
+}
+
+static irqreturn_t mt6370_attach_i_handler(int irq, void *data)
+{
+ struct mt6370_priv *priv = data;
+ u32 otg_en;
+ int ret;
+
+ /* Check in otg mode or not */
+ ret = mt6370_chg_field_get(priv, F_BOOST_STAT, &otg_en);
+ if (ret < 0) {
+ dev_err(priv->dev, "failed to get otg state\n");
+ return IRQ_HANDLED;
+ }
+
+ if (otg_en)
+ return IRQ_HANDLED;
+
+ mutex_lock(&priv->attach_lock);
+ atomic_set(&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);
+ mt6370_chg_enable_irq(priv, "mivr", false);
+ 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) {
+ dev_err(priv->dev, "Failed to get irq %s\n",
+ mt6370_chg_irqs[i].name);
+ return 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 < 0) {
+ dev_err(priv->dev, "Failed to request irq %s\n",
+ mt6370_chg_irqs[i].name);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int mt6370_chg_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct mt6370_priv *priv;
+
+ priv = devm_kzalloc(&pdev->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) {
+ dev_err(&pdev->dev, "Failed to get regmap\n");
+ return -ENODEV;
+ }
+
+ ret = mt6370_chg_init_rmap_fields(priv);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to init regmap fields\n");
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, priv);
+
+ priv->iio_adcs = devm_iio_channel_get_all(priv->dev);
+ if (IS_ERR(priv->iio_adcs)) {
+ dev_err(&pdev->dev, "Failed to get iio adc\n");
+ return PTR_ERR(priv->iio_adcs);
+ }
+
+ ret = mt6370_chg_init_otg_regulator(priv);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to init otg regulator\n");
+ return ret;
+ }
+
+ ret = mt6370_chg_init_psy(priv);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to init psy\n");
+ return ret;
+ }
+
+ ret = mt6370_chg_init_setting(priv);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to init mt6370 private data\n");
+ goto probe_out;
+ }
+
+ ret = mt6370_chg_init_irq(priv);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to init irq\n");
+ goto probe_out;
+ }
+
+ mt6370_chg_pwr_rdy_check(priv);
+
+ return 0;
+
+probe_out:
+ destroy_workqueue(priv->wq);
+ mutex_destroy(&priv->attach_lock);
+
+ return ret;
+}
+
+static int mt6370_chg_remove(struct platform_device *pdev)
+{
+ struct mt6370_priv *priv = platform_get_drvdata(pdev);
+
+ if (priv) {
+ mt6370_chg_enable_irq(priv, "mivr", false);
+ cancel_delayed_work_sync(&priv->mivr_dwork);
+ destroy_workqueue(priv->wq);
+ mutex_destroy(&priv->attach_lock);
+ }
+
+ 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,
+ .remove = mt6370_chg_remove,
+ .driver = {
+ .name = "mt6370-charger",
+ .of_match_table = of_match_ptr(mt6370_chg_of_match),
+ },
+};
+module_platform_driver(mt6370_chg_driver);
+
+MODULE_AUTHOR("ChiaEn Wu <chiaen_wu@richtek.com>");
+MODULE_DESCRIPTION("Mediatek MT6370 Charger Driver");
+MODULE_LICENSE("GPL v2");
--
2.7.4
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