From: ChiaEn Wu <chiaen_wu@richtek.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 MT6370 ADC driver for system monitoring, including
charger current, voltage, and temperature.
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
---
v14
- Revise the scale value of 'VBUSDIV2' in 'mt6370_adc_read_scale()'
(50 --> 10)
- Revise the return value of 'TEMP_JC' in 'mt6370_adc_read_scale()'
(return IIO_VAL_FRACTIONAL; --> return IIO_VAL_INT;)
---
drivers/iio/adc/Kconfig | 12 ++
drivers/iio/adc/Makefile | 1 +
drivers/iio/adc/mt6370-adc.c | 305 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 318 insertions(+)
create mode 100644 drivers/iio/adc/mt6370-adc.c
diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
index 791612c..f4fdca8 100644
--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -752,6 +752,18 @@ config MEDIATEK_MT6360_ADC
is used in smartphones and tablets and supports a 11 channel
general purpose ADC.
+config MEDIATEK_MT6370_ADC
+ tristate "MediaTek MT6370 ADC driver"
+ depends on MFD_MT6370
+ help
+ Say yes here to enable MediaTek MT6370 ADC support.
+
+ This ADC driver provides 9 channels for system monitoring (charger
+ current, voltage, and temperature).
+
+ This driver can also be built as a module. If so, the module
+ will be called "mt6370-adc".
+
config MEDIATEK_MT6577_AUXADC
tristate "MediaTek AUXADC driver"
depends on ARCH_MEDIATEK || COMPILE_TEST
diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile
index 46caba7..953fada 100644
--- a/drivers/iio/adc/Makefile
+++ b/drivers/iio/adc/Makefile
@@ -69,6 +69,7 @@ obj-$(CONFIG_MCP320X) += mcp320x.o
obj-$(CONFIG_MCP3422) += mcp3422.o
obj-$(CONFIG_MCP3911) += mcp3911.o
obj-$(CONFIG_MEDIATEK_MT6360_ADC) += mt6360-adc.o
+obj-$(CONFIG_MEDIATEK_MT6370_ADC) += mt6370-adc.o
obj-$(CONFIG_MEDIATEK_MT6577_AUXADC) += mt6577_auxadc.o
obj-$(CONFIG_MEN_Z188_ADC) += men_z188_adc.o
obj-$(CONFIG_MESON_SARADC) += meson_saradc.o
diff --git a/drivers/iio/adc/mt6370-adc.c b/drivers/iio/adc/mt6370-adc.c
new file mode 100644
index 0000000..bc62e5a
--- /dev/null
+++ b/drivers/iio/adc/mt6370-adc.c
@@ -0,0 +1,305 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2022 Richtek Technology Corp.
+ *
+ * Author: ChiaEn Wu <chiaen_wu@richtek.com>
+ */
+
+#include <linux/bits.h>
+#include <linux/bitfield.h>
+#include <linux/iio/iio.h>
+#include <linux/kernel.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/sysfs.h>
+#include <linux/units.h>
+
+#include <dt-bindings/iio/adc/mediatek,mt6370_adc.h>
+
+#define MT6370_REG_CHG_CTRL3 0x113
+#define MT6370_REG_CHG_CTRL7 0x117
+#define MT6370_REG_CHG_ADC 0x121
+#define MT6370_REG_ADC_DATA_H 0x14C
+
+#define MT6370_ADC_START_MASK BIT(0)
+#define MT6370_ADC_IN_SEL_MASK GENMASK(7, 4)
+#define MT6370_AICR_ICHG_MASK GENMASK(7, 2)
+
+#define MT6370_AICR_100_mA 0x0
+#define MT6370_AICR_150_mA 0x1
+#define MT6370_AICR_200_mA 0x2
+#define MT6370_AICR_250_mA 0x3
+#define MT6370_AICR_300_mA 0x4
+#define MT6370_AICR_350_mA 0x5
+
+#define MT6370_ICHG_100_mA 0x0
+#define MT6370_ICHG_200_mA 0x1
+#define MT6370_ICHG_300_mA 0x2
+#define MT6370_ICHG_400_mA 0x3
+#define MT6370_ICHG_500_mA 0x4
+#define MT6370_ICHG_600_mA 0x5
+#define MT6370_ICHG_700_mA 0x6
+#define MT6370_ICHG_800_mA 0x7
+
+#define ADC_CONV_TIME_MS 35
+#define ADC_CONV_POLLING_TIME_US 1000
+
+struct mt6370_adc_data {
+ struct device *dev;
+ struct regmap *regmap;
+ /*
+ * This mutex lock is for preventing the different ADC channels
+ * from being read at the same time.
+ */
+ struct mutex adc_lock;
+};
+
+static int mt6370_adc_read_channel(struct mt6370_adc_data *priv, int chan,
+ unsigned long addr, int *val)
+{
+ unsigned int reg_val;
+ __be16 be_val;
+ int ret;
+
+ mutex_lock(&priv->adc_lock);
+
+ reg_val = MT6370_ADC_START_MASK |
+ FIELD_PREP(MT6370_ADC_IN_SEL_MASK, addr);
+ ret = regmap_write(priv->regmap, MT6370_REG_CHG_ADC, reg_val);
+ if (ret)
+ goto adc_unlock;
+
+ msleep(ADC_CONV_TIME_MS);
+
+ ret = regmap_read_poll_timeout(priv->regmap,
+ MT6370_REG_CHG_ADC, reg_val,
+ !(reg_val & MT6370_ADC_START_MASK),
+ ADC_CONV_POLLING_TIME_US,
+ ADC_CONV_TIME_MS * MILLI * 3);
+ if (ret) {
+ dev_err(priv->dev, "Failed to read ADC register (%d)\n", ret);
+ goto adc_unlock;
+ }
+
+ ret = regmap_raw_read(priv->regmap, MT6370_REG_ADC_DATA_H,
+ &be_val, sizeof(be_val));
+ if (ret)
+ goto adc_unlock;
+
+ *val = be16_to_cpu(be_val);
+ ret = IIO_VAL_INT;
+
+adc_unlock:
+ mutex_unlock(&priv->adc_lock);
+
+ return ret;
+}
+
+static int mt6370_adc_read_scale(struct mt6370_adc_data *priv,
+ int chan, int *val1, int *val2)
+{
+ unsigned int reg_val;
+ int ret;
+
+ switch (chan) {
+ case MT6370_CHAN_VBAT:
+ case MT6370_CHAN_VSYS:
+ case MT6370_CHAN_CHG_VDDP:
+ *val1 = 5;
+ return IIO_VAL_INT;
+ case MT6370_CHAN_IBUS:
+ ret = regmap_read(priv->regmap, MT6370_REG_CHG_CTRL3, ®_val);
+ if (ret)
+ return ret;
+
+ reg_val = FIELD_GET(MT6370_AICR_ICHG_MASK, reg_val);
+ switch (reg_val) {
+ case MT6370_AICR_100_mA:
+ case MT6370_AICR_150_mA:
+ case MT6370_AICR_200_mA:
+ case MT6370_AICR_250_mA:
+ case MT6370_AICR_300_mA:
+ case MT6370_AICR_350_mA:
+ *val1 = 3350;
+ break;
+ default:
+ *val1 = 5000;
+ break;
+ }
+
+ *val2 = 100;
+
+ return IIO_VAL_FRACTIONAL;
+ case MT6370_CHAN_IBAT:
+ ret = regmap_read(priv->regmap, MT6370_REG_CHG_CTRL7, ®_val);
+ if (ret)
+ return ret;
+
+ reg_val = FIELD_GET(MT6370_AICR_ICHG_MASK, reg_val);
+ switch (reg_val) {
+ case MT6370_ICHG_100_mA:
+ case MT6370_ICHG_200_mA:
+ case MT6370_ICHG_300_mA:
+ case MT6370_ICHG_400_mA:
+ *val1 = 2375;
+ break;
+ case MT6370_ICHG_500_mA:
+ case MT6370_ICHG_600_mA:
+ case MT6370_ICHG_700_mA:
+ case MT6370_ICHG_800_mA:
+ *val1 = 2680;
+ break;
+ default:
+ *val1 = 5000;
+ break;
+ }
+
+ *val2 = 100;
+
+ return IIO_VAL_FRACTIONAL;
+ case MT6370_CHAN_VBUSDIV5:
+ *val1 = 25;
+ return IIO_VAL_INT;
+ case MT6370_CHAN_VBUSDIV2:
+ *val1 = 10;
+ return IIO_VAL_INT;
+ case MT6370_CHAN_TS_BAT:
+ *val1 = 25;
+ *val2 = 10000;
+ return IIO_VAL_FRACTIONAL;
+ case MT6370_CHAN_TEMP_JC:
+ *val1 = 2000;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int mt6370_adc_read_offset(struct mt6370_adc_data *priv,
+ int chan, int *val)
+{
+ *val = -20;
+
+ return IIO_VAL_INT;
+}
+
+static int mt6370_adc_read_raw(struct iio_dev *iio_dev,
+ const struct iio_chan_spec *chan,
+ int *val, int *val2, long mask)
+{
+ struct mt6370_adc_data *priv = iio_priv(iio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ return mt6370_adc_read_channel(priv, chan->channel,
+ chan->address, val);
+ case IIO_CHAN_INFO_SCALE:
+ return mt6370_adc_read_scale(priv, chan->channel, val, val2);
+ case IIO_CHAN_INFO_OFFSET:
+ return mt6370_adc_read_offset(priv, chan->channel, val);
+ default:
+ return -EINVAL;
+ }
+}
+
+static const char * const mt6370_channel_labels[MT6370_CHAN_MAX] = {
+ [MT6370_CHAN_VBUSDIV5] = "vbusdiv5",
+ [MT6370_CHAN_VBUSDIV2] = "vbusdiv2",
+ [MT6370_CHAN_VSYS] = "vsys",
+ [MT6370_CHAN_VBAT] = "vbat",
+ [MT6370_CHAN_TS_BAT] = "ts_bat",
+ [MT6370_CHAN_IBUS] = "ibus",
+ [MT6370_CHAN_IBAT] = "ibat",
+ [MT6370_CHAN_CHG_VDDP] = "chg_vddp",
+ [MT6370_CHAN_TEMP_JC] = "temp_jc",
+};
+
+static int mt6370_adc_read_label(struct iio_dev *iio_dev,
+ struct iio_chan_spec const *chan, char *label)
+{
+ return sysfs_emit(label, "%s\n", mt6370_channel_labels[chan->channel]);
+}
+
+static const struct iio_info mt6370_adc_iio_info = {
+ .read_raw = mt6370_adc_read_raw,
+ .read_label = mt6370_adc_read_label,
+};
+
+#define MT6370_ADC_CHAN(_idx, _type, _addr, _extra_info) { \
+ .type = _type, \
+ .channel = MT6370_CHAN_##_idx, \
+ .address = _addr, \
+ .scan_index = MT6370_CHAN_##_idx, \
+ .indexed = 1, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_SCALE) | \
+ _extra_info, \
+}
+
+static const struct iio_chan_spec mt6370_adc_channels[] = {
+ MT6370_ADC_CHAN(VBUSDIV5, IIO_VOLTAGE, 1, 0),
+ MT6370_ADC_CHAN(VBUSDIV2, IIO_VOLTAGE, 2, 0),
+ MT6370_ADC_CHAN(VSYS, IIO_VOLTAGE, 3, 0),
+ MT6370_ADC_CHAN(VBAT, IIO_VOLTAGE, 4, 0),
+ MT6370_ADC_CHAN(TS_BAT, IIO_VOLTAGE, 6, 0),
+ MT6370_ADC_CHAN(IBUS, IIO_CURRENT, 8, 0),
+ MT6370_ADC_CHAN(IBAT, IIO_CURRENT, 9, 0),
+ MT6370_ADC_CHAN(CHG_VDDP, IIO_VOLTAGE, 11, 0),
+ MT6370_ADC_CHAN(TEMP_JC, IIO_TEMP, 12, BIT(IIO_CHAN_INFO_OFFSET)),
+};
+
+static int mt6370_adc_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct mt6370_adc_data *priv;
+ struct iio_dev *indio_dev;
+ struct regmap *regmap;
+ int ret;
+
+ regmap = dev_get_regmap(pdev->dev.parent, NULL);
+ if (!regmap)
+ return dev_err_probe(dev, -ENODEV, "Failed to get regmap\n");
+
+ indio_dev = devm_iio_device_alloc(dev, sizeof(*priv));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ priv = iio_priv(indio_dev);
+ priv->dev = dev;
+ priv->regmap = regmap;
+ mutex_init(&priv->adc_lock);
+
+ ret = regmap_write(priv->regmap, MT6370_REG_CHG_ADC, 0);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to reset ADC\n");
+
+ indio_dev->name = "mt6370-adc";
+ indio_dev->info = &mt6370_adc_iio_info;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->channels = mt6370_adc_channels;
+ indio_dev->num_channels = ARRAY_SIZE(mt6370_adc_channels);
+
+ return devm_iio_device_register(dev, indio_dev);
+}
+
+static const struct of_device_id mt6370_adc_of_id[] = {
+ { .compatible = "mediatek,mt6370-adc", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, mt6370_adc_of_id);
+
+static struct platform_driver mt6370_adc_driver = {
+ .driver = {
+ .name = "mt6370-adc",
+ .of_match_table = mt6370_adc_of_id,
+ },
+ .probe = mt6370_adc_probe,
+};
+module_platform_driver(mt6370_adc_driver);
+
+MODULE_AUTHOR("ChiaEn Wu <chiaen_wu@richtek.com>");
+MODULE_DESCRIPTION("MT6370 ADC Driver");
+MODULE_LICENSE("GPL v2");
--
2.7.4
On Tue, 11 Oct 2022 12:05:45 +0800 ChiaEn Wu <peterwu.pub@gmail.com> wrote: > From: ChiaEn Wu <chiaen_wu@richtek.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 MT6370 ADC driver for system monitoring, including > charger current, voltage, and temperature. > > Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> > Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> > Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> > Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com> The header is now upstream so applied to the togreg branch of iio.git but only pushing that out as testing until I can rebase it on rc1. For now it's based on somewhere random, mid merge window. Thanks, Jonathan > --- > > v14 > - Revise the scale value of 'VBUSDIV2' in 'mt6370_adc_read_scale()' > (50 --> 10) > - Revise the return value of 'TEMP_JC' in 'mt6370_adc_read_scale()' > (return IIO_VAL_FRACTIONAL; --> return IIO_VAL_INT;) > --- > drivers/iio/adc/Kconfig | 12 ++ > drivers/iio/adc/Makefile | 1 + > drivers/iio/adc/mt6370-adc.c | 305 +++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 318 insertions(+) > create mode 100644 drivers/iio/adc/mt6370-adc.c > > diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig > index 791612c..f4fdca8 100644 > --- a/drivers/iio/adc/Kconfig > +++ b/drivers/iio/adc/Kconfig > @@ -752,6 +752,18 @@ config MEDIATEK_MT6360_ADC > is used in smartphones and tablets and supports a 11 channel > general purpose ADC. > > +config MEDIATEK_MT6370_ADC > + tristate "MediaTek MT6370 ADC driver" > + depends on MFD_MT6370 > + help > + Say yes here to enable MediaTek MT6370 ADC support. > + > + This ADC driver provides 9 channels for system monitoring (charger > + current, voltage, and temperature). > + > + This driver can also be built as a module. If so, the module > + will be called "mt6370-adc". > + > config MEDIATEK_MT6577_AUXADC > tristate "MediaTek AUXADC driver" > depends on ARCH_MEDIATEK || COMPILE_TEST > diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile > index 46caba7..953fada 100644 > --- a/drivers/iio/adc/Makefile > +++ b/drivers/iio/adc/Makefile > @@ -69,6 +69,7 @@ obj-$(CONFIG_MCP320X) += mcp320x.o > obj-$(CONFIG_MCP3422) += mcp3422.o > obj-$(CONFIG_MCP3911) += mcp3911.o > obj-$(CONFIG_MEDIATEK_MT6360_ADC) += mt6360-adc.o > +obj-$(CONFIG_MEDIATEK_MT6370_ADC) += mt6370-adc.o > obj-$(CONFIG_MEDIATEK_MT6577_AUXADC) += mt6577_auxadc.o > obj-$(CONFIG_MEN_Z188_ADC) += men_z188_adc.o > obj-$(CONFIG_MESON_SARADC) += meson_saradc.o > diff --git a/drivers/iio/adc/mt6370-adc.c b/drivers/iio/adc/mt6370-adc.c > new file mode 100644 > index 0000000..bc62e5a > --- /dev/null > +++ b/drivers/iio/adc/mt6370-adc.c > @@ -0,0 +1,305 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * Copyright (C) 2022 Richtek Technology Corp. > + * > + * Author: ChiaEn Wu <chiaen_wu@richtek.com> > + */ > + > +#include <linux/bits.h> > +#include <linux/bitfield.h> > +#include <linux/iio/iio.h> > +#include <linux/kernel.h> > +#include <linux/mod_devicetable.h> > +#include <linux/module.h> > +#include <linux/mutex.h> > +#include <linux/platform_device.h> > +#include <linux/regmap.h> > +#include <linux/sysfs.h> > +#include <linux/units.h> > + > +#include <dt-bindings/iio/adc/mediatek,mt6370_adc.h> > + > +#define MT6370_REG_CHG_CTRL3 0x113 > +#define MT6370_REG_CHG_CTRL7 0x117 > +#define MT6370_REG_CHG_ADC 0x121 > +#define MT6370_REG_ADC_DATA_H 0x14C > + > +#define MT6370_ADC_START_MASK BIT(0) > +#define MT6370_ADC_IN_SEL_MASK GENMASK(7, 4) > +#define MT6370_AICR_ICHG_MASK GENMASK(7, 2) > + > +#define MT6370_AICR_100_mA 0x0 > +#define MT6370_AICR_150_mA 0x1 > +#define MT6370_AICR_200_mA 0x2 > +#define MT6370_AICR_250_mA 0x3 > +#define MT6370_AICR_300_mA 0x4 > +#define MT6370_AICR_350_mA 0x5 > + > +#define MT6370_ICHG_100_mA 0x0 > +#define MT6370_ICHG_200_mA 0x1 > +#define MT6370_ICHG_300_mA 0x2 > +#define MT6370_ICHG_400_mA 0x3 > +#define MT6370_ICHG_500_mA 0x4 > +#define MT6370_ICHG_600_mA 0x5 > +#define MT6370_ICHG_700_mA 0x6 > +#define MT6370_ICHG_800_mA 0x7 > + > +#define ADC_CONV_TIME_MS 35 > +#define ADC_CONV_POLLING_TIME_US 1000 > + > +struct mt6370_adc_data { > + struct device *dev; > + struct regmap *regmap; > + /* > + * This mutex lock is for preventing the different ADC channels > + * from being read at the same time. > + */ > + struct mutex adc_lock; > +}; > + > +static int mt6370_adc_read_channel(struct mt6370_adc_data *priv, int chan, > + unsigned long addr, int *val) > +{ > + unsigned int reg_val; > + __be16 be_val; > + int ret; > + > + mutex_lock(&priv->adc_lock); > + > + reg_val = MT6370_ADC_START_MASK | > + FIELD_PREP(MT6370_ADC_IN_SEL_MASK, addr); > + ret = regmap_write(priv->regmap, MT6370_REG_CHG_ADC, reg_val); > + if (ret) > + goto adc_unlock; > + > + msleep(ADC_CONV_TIME_MS); > + > + ret = regmap_read_poll_timeout(priv->regmap, > + MT6370_REG_CHG_ADC, reg_val, > + !(reg_val & MT6370_ADC_START_MASK), > + ADC_CONV_POLLING_TIME_US, > + ADC_CONV_TIME_MS * MILLI * 3); > + if (ret) { > + dev_err(priv->dev, "Failed to read ADC register (%d)\n", ret); > + goto adc_unlock; > + } > + > + ret = regmap_raw_read(priv->regmap, MT6370_REG_ADC_DATA_H, > + &be_val, sizeof(be_val)); > + if (ret) > + goto adc_unlock; > + > + *val = be16_to_cpu(be_val); > + ret = IIO_VAL_INT; > + > +adc_unlock: > + mutex_unlock(&priv->adc_lock); > + > + return ret; > +} > + > +static int mt6370_adc_read_scale(struct mt6370_adc_data *priv, > + int chan, int *val1, int *val2) > +{ > + unsigned int reg_val; > + int ret; > + > + switch (chan) { > + case MT6370_CHAN_VBAT: > + case MT6370_CHAN_VSYS: > + case MT6370_CHAN_CHG_VDDP: > + *val1 = 5; > + return IIO_VAL_INT; > + case MT6370_CHAN_IBUS: > + ret = regmap_read(priv->regmap, MT6370_REG_CHG_CTRL3, ®_val); > + if (ret) > + return ret; > + > + reg_val = FIELD_GET(MT6370_AICR_ICHG_MASK, reg_val); > + switch (reg_val) { > + case MT6370_AICR_100_mA: > + case MT6370_AICR_150_mA: > + case MT6370_AICR_200_mA: > + case MT6370_AICR_250_mA: > + case MT6370_AICR_300_mA: > + case MT6370_AICR_350_mA: > + *val1 = 3350; > + break; > + default: > + *val1 = 5000; > + break; > + } > + > + *val2 = 100; > + > + return IIO_VAL_FRACTIONAL; > + case MT6370_CHAN_IBAT: > + ret = regmap_read(priv->regmap, MT6370_REG_CHG_CTRL7, ®_val); > + if (ret) > + return ret; > + > + reg_val = FIELD_GET(MT6370_AICR_ICHG_MASK, reg_val); > + switch (reg_val) { > + case MT6370_ICHG_100_mA: > + case MT6370_ICHG_200_mA: > + case MT6370_ICHG_300_mA: > + case MT6370_ICHG_400_mA: > + *val1 = 2375; > + break; > + case MT6370_ICHG_500_mA: > + case MT6370_ICHG_600_mA: > + case MT6370_ICHG_700_mA: > + case MT6370_ICHG_800_mA: > + *val1 = 2680; > + break; > + default: > + *val1 = 5000; > + break; > + } > + > + *val2 = 100; > + > + return IIO_VAL_FRACTIONAL; > + case MT6370_CHAN_VBUSDIV5: > + *val1 = 25; > + return IIO_VAL_INT; > + case MT6370_CHAN_VBUSDIV2: > + *val1 = 10; > + return IIO_VAL_INT; > + case MT6370_CHAN_TS_BAT: > + *val1 = 25; > + *val2 = 10000; > + return IIO_VAL_FRACTIONAL; > + case MT6370_CHAN_TEMP_JC: > + *val1 = 2000; > + return IIO_VAL_INT; > + default: > + return -EINVAL; > + } > +} > + > +static int mt6370_adc_read_offset(struct mt6370_adc_data *priv, > + int chan, int *val) > +{ > + *val = -20; > + > + return IIO_VAL_INT; > +} > + > +static int mt6370_adc_read_raw(struct iio_dev *iio_dev, > + const struct iio_chan_spec *chan, > + int *val, int *val2, long mask) > +{ > + struct mt6370_adc_data *priv = iio_priv(iio_dev); > + > + switch (mask) { > + case IIO_CHAN_INFO_RAW: > + return mt6370_adc_read_channel(priv, chan->channel, > + chan->address, val); > + case IIO_CHAN_INFO_SCALE: > + return mt6370_adc_read_scale(priv, chan->channel, val, val2); > + case IIO_CHAN_INFO_OFFSET: > + return mt6370_adc_read_offset(priv, chan->channel, val); > + default: > + return -EINVAL; > + } > +} > + > +static const char * const mt6370_channel_labels[MT6370_CHAN_MAX] = { > + [MT6370_CHAN_VBUSDIV5] = "vbusdiv5", > + [MT6370_CHAN_VBUSDIV2] = "vbusdiv2", > + [MT6370_CHAN_VSYS] = "vsys", > + [MT6370_CHAN_VBAT] = "vbat", > + [MT6370_CHAN_TS_BAT] = "ts_bat", > + [MT6370_CHAN_IBUS] = "ibus", > + [MT6370_CHAN_IBAT] = "ibat", > + [MT6370_CHAN_CHG_VDDP] = "chg_vddp", > + [MT6370_CHAN_TEMP_JC] = "temp_jc", > +}; > + > +static int mt6370_adc_read_label(struct iio_dev *iio_dev, > + struct iio_chan_spec const *chan, char *label) > +{ > + return sysfs_emit(label, "%s\n", mt6370_channel_labels[chan->channel]); > +} > + > +static const struct iio_info mt6370_adc_iio_info = { > + .read_raw = mt6370_adc_read_raw, > + .read_label = mt6370_adc_read_label, > +}; > + > +#define MT6370_ADC_CHAN(_idx, _type, _addr, _extra_info) { \ > + .type = _type, \ > + .channel = MT6370_CHAN_##_idx, \ > + .address = _addr, \ > + .scan_index = MT6370_CHAN_##_idx, \ > + .indexed = 1, \ > + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ > + BIT(IIO_CHAN_INFO_SCALE) | \ > + _extra_info, \ > +} > + > +static const struct iio_chan_spec mt6370_adc_channels[] = { > + MT6370_ADC_CHAN(VBUSDIV5, IIO_VOLTAGE, 1, 0), > + MT6370_ADC_CHAN(VBUSDIV2, IIO_VOLTAGE, 2, 0), > + MT6370_ADC_CHAN(VSYS, IIO_VOLTAGE, 3, 0), > + MT6370_ADC_CHAN(VBAT, IIO_VOLTAGE, 4, 0), > + MT6370_ADC_CHAN(TS_BAT, IIO_VOLTAGE, 6, 0), > + MT6370_ADC_CHAN(IBUS, IIO_CURRENT, 8, 0), > + MT6370_ADC_CHAN(IBAT, IIO_CURRENT, 9, 0), > + MT6370_ADC_CHAN(CHG_VDDP, IIO_VOLTAGE, 11, 0), > + MT6370_ADC_CHAN(TEMP_JC, IIO_TEMP, 12, BIT(IIO_CHAN_INFO_OFFSET)), > +}; > + > +static int mt6370_adc_probe(struct platform_device *pdev) > +{ > + struct device *dev = &pdev->dev; > + struct mt6370_adc_data *priv; > + struct iio_dev *indio_dev; > + struct regmap *regmap; > + int ret; > + > + regmap = dev_get_regmap(pdev->dev.parent, NULL); > + if (!regmap) > + return dev_err_probe(dev, -ENODEV, "Failed to get regmap\n"); > + > + indio_dev = devm_iio_device_alloc(dev, sizeof(*priv)); > + if (!indio_dev) > + return -ENOMEM; > + > + priv = iio_priv(indio_dev); > + priv->dev = dev; > + priv->regmap = regmap; > + mutex_init(&priv->adc_lock); > + > + ret = regmap_write(priv->regmap, MT6370_REG_CHG_ADC, 0); > + if (ret) > + return dev_err_probe(dev, ret, "Failed to reset ADC\n"); > + > + indio_dev->name = "mt6370-adc"; > + indio_dev->info = &mt6370_adc_iio_info; > + indio_dev->modes = INDIO_DIRECT_MODE; > + indio_dev->channels = mt6370_adc_channels; > + indio_dev->num_channels = ARRAY_SIZE(mt6370_adc_channels); > + > + return devm_iio_device_register(dev, indio_dev); > +} > + > +static const struct of_device_id mt6370_adc_of_id[] = { > + { .compatible = "mediatek,mt6370-adc", }, > + {} > +}; > +MODULE_DEVICE_TABLE(of, mt6370_adc_of_id); > + > +static struct platform_driver mt6370_adc_driver = { > + .driver = { > + .name = "mt6370-adc", > + .of_match_table = mt6370_adc_of_id, > + }, > + .probe = mt6370_adc_probe, > +}; > +module_platform_driver(mt6370_adc_driver); > + > +MODULE_AUTHOR("ChiaEn Wu <chiaen_wu@richtek.com>"); > +MODULE_DESCRIPTION("MT6370 ADC Driver"); > +MODULE_LICENSE("GPL v2");
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