* [PATCH v7 0/5] Add battery charger driver support for MP2629
@ 2020-04-10 20:19 Saravanan Sekar
2020-04-10 20:19 ` [PATCH v7 1/5] dt-bindings: mfd: add document bindings for mp2629 Saravanan Sekar
` (5 more replies)
0 siblings, 6 replies; 11+ messages in thread
From: Saravanan Sekar @ 2020-04-10 20:19 UTC (permalink / raw)
To: lee.jones, andy.shevchenko, robh+dt, jic23, knaack.h, lars, pmeerw, sre
Cc: devicetree, linux-kernel, linux-iio, linux-pm, Saravanan Sekar
changes in v7:
- fixed probe/remove order, managed and unmanaged call mix use in adc.
- Documentation dual license, i2c node with controller address
changes in v6:
- removed includes types.h in mfd, of_device.h in adc.
- fixed review comments parentheses, err check, kstrtouint
changes in v5:
- removed platfrom data stored in mfd and directly accessed mfd struct in child
- fixed spell check and capitalization in mfd and documentation
changes in v4:
- fixed capitalization in mfg Kconfig and documentation
changes in v3:
- regmap for children passed using platform data and remove mfd driver info
access directly from children
changes in v2:
- removed EXPORT_SYMBOL of register set/get helper
- regmap bit filed used, fixed other review comments
This patch series add support for Battery charger control driver for Monolithic
Power System's MP2629 chipset, includes MFD driver for ADC battery & input
power supply measurement and battery charger control driver.
Thanks,
Saravanan
Saravanan Sekar (5):
dt-bindings: mfd: add document bindings for mp2629
mfd: mp2629: Add support for mps battery charger
iio: adc: mp2629: Add support for mp2629 ADC driver
power: supply: Add support for mps mp2629 battery charger
MAINTAINERS: Add entry for mp2629 Battery Charger driver
.../devicetree/bindings/mfd/mps,mp2629.yaml | 60 ++
MAINTAINERS | 5 +
drivers/iio/adc/Kconfig | 10 +
drivers/iio/adc/Makefile | 1 +
drivers/iio/adc/mp2629_adc.c | 208 ++++++
drivers/mfd/Kconfig | 9 +
drivers/mfd/Makefile | 2 +
drivers/mfd/mp2629.c | 86 +++
drivers/power/supply/Kconfig | 10 +
drivers/power/supply/Makefile | 1 +
drivers/power/supply/mp2629_charger.c | 687 ++++++++++++++++++
include/linux/mfd/mp2629.h | 28 +
12 files changed, 1107 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mfd/mps,mp2629.yaml
create mode 100644 drivers/iio/adc/mp2629_adc.c
create mode 100644 drivers/mfd/mp2629.c
create mode 100644 drivers/power/supply/mp2629_charger.c
create mode 100644 include/linux/mfd/mp2629.h
--
2.17.1
^ permalink raw reply [flat|nested] 11+ messages in thread
* [PATCH v7 1/5] dt-bindings: mfd: add document bindings for mp2629
2020-04-10 20:19 [PATCH v7 0/5] Add battery charger driver support for MP2629 Saravanan Sekar
@ 2020-04-10 20:19 ` Saravanan Sekar
2020-04-10 20:19 ` [PATCH v7 2/5] mfd: mp2629: Add support for mps battery charger Saravanan Sekar
` (4 subsequent siblings)
5 siblings, 0 replies; 11+ messages in thread
From: Saravanan Sekar @ 2020-04-10 20:19 UTC (permalink / raw)
To: lee.jones, andy.shevchenko, robh+dt, jic23, knaack.h, lars, pmeerw, sre
Cc: devicetree, linux-kernel, linux-iio, linux-pm, Saravanan Sekar
Add device tree binding information for mp2629 mfd driver.
Signed-off-by: Saravanan Sekar <sravanhome@gmail.com>
---
.../devicetree/bindings/mfd/mps,mp2629.yaml | 60 +++++++++++++++++++
1 file changed, 60 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mfd/mps,mp2629.yaml
diff --git a/Documentation/devicetree/bindings/mfd/mps,mp2629.yaml b/Documentation/devicetree/bindings/mfd/mps,mp2629.yaml
new file mode 100644
index 000000000000..e71c554802a8
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/mps,mp2629.yaml
@@ -0,0 +1,60 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/mps,mp2629.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MP2629 Battery Charger PMIC from Monolithic Power System.
+
+maintainers:
+ - Saravanan Sekar <sravanhome@gmail.com>
+
+description: |
+ MP2629 is a PMIC providing battery charging and power supply for smartphones,
+ wireless camera and portable devices. Chip is contrlled over I2C.
+
+ The battery charge management device handles battery charger controller and
+ ADC IIO device for battery, system voltage
+
+properties:
+ compatible:
+ const: mps,mp2629
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ interrupt-controller: true
+
+ "#interrupt-cells":
+ const: 2
+ description:
+ The first cell is the IRQ number, the second cell is the trigger type.
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - interrupt-controller
+ - "#interrupt-cells"
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+ #include <dt-bindings/input/linux-event-codes.h>
+ i2c@7e205000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ pmic@4b {
+ compatible = "mps,mp2629";
+ reg = <0x4b>;
+
+ interrupt-controller;
+ interrupt-parent = <&gpio2>;
+ #interrupt-cells = <2>;
+ interrupts = <3 IRQ_TYPE_LEVEL_HIGH>;
+ };
+ };
--
2.17.1
^ permalink raw reply related [flat|nested] 11+ messages in thread
* [PATCH v7 2/5] mfd: mp2629: Add support for mps battery charger
2020-04-10 20:19 [PATCH v7 0/5] Add battery charger driver support for MP2629 Saravanan Sekar
2020-04-10 20:19 ` [PATCH v7 1/5] dt-bindings: mfd: add document bindings for mp2629 Saravanan Sekar
@ 2020-04-10 20:19 ` Saravanan Sekar
2020-04-10 20:19 ` [PATCH v7 3/5] iio: adc: mp2629: Add support for mp2629 ADC driver Saravanan Sekar
` (3 subsequent siblings)
5 siblings, 0 replies; 11+ messages in thread
From: Saravanan Sekar @ 2020-04-10 20:19 UTC (permalink / raw)
To: lee.jones, andy.shevchenko, robh+dt, jic23, knaack.h, lars, pmeerw, sre
Cc: devicetree, linux-kernel, linux-iio, linux-pm, Saravanan Sekar
mp2629 is a highly-integrated switching-mode battery charge management
device for single-cell Li-ion or Li-polymer battery.
Add MFD core enables chip access for ADC driver for battery readings,
and a power supply battery-charger driver
Signed-off-by: Saravanan Sekar <sravanhome@gmail.com>
---
drivers/mfd/Kconfig | 9 ++++
drivers/mfd/Makefile | 2 +
drivers/mfd/mp2629.c | 86 ++++++++++++++++++++++++++++++++++++++
include/linux/mfd/mp2629.h | 19 +++++++++
4 files changed, 116 insertions(+)
create mode 100644 drivers/mfd/mp2629.c
create mode 100644 include/linux/mfd/mp2629.h
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 3c547ed575e6..85be799795aa 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -434,6 +434,15 @@ config MFD_MC13XXX_I2C
help
Select this if your MC13xxx is connected via an I2C bus.
+config MFD_MP2629
+ tristate "Monolithic power system MP2629 ADC and Battery charger"
+ depends on I2C
+ select REGMAP_I2C
+ help
+ Select this option to enable support for monolithic power system
+ battery charger. This provides ADC, thermal, battery charger power
+ management functions on the systems.
+
config MFD_MXS_LRADC
tristate "Freescale i.MX23/i.MX28 LRADC"
depends on ARCH_MXS || COMPILE_TEST
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index f935d10cbf0f..d6c210f96d02 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -170,6 +170,8 @@ obj-$(CONFIG_MFD_MAX8925) += max8925.o
obj-$(CONFIG_MFD_MAX8997) += max8997.o max8997-irq.o
obj-$(CONFIG_MFD_MAX8998) += max8998.o max8998-irq.o
+obj-$(CONFIG_MFD_MP2629) += mp2629.o
+
pcf50633-objs := pcf50633-core.o pcf50633-irq.o
obj-$(CONFIG_MFD_PCF50633) += pcf50633.o
obj-$(CONFIG_PCF50633_ADC) += pcf50633-adc.o
diff --git a/drivers/mfd/mp2629.c b/drivers/mfd/mp2629.c
new file mode 100644
index 000000000000..46242b1cdf24
--- /dev/null
+++ b/drivers/mfd/mp2629.c
@@ -0,0 +1,86 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * MP2629 parent driver for ADC and battery charger
+ *
+ * Copyright 2020 Monolithic Power Systems, Inc
+ *
+ * Author: Saravanan Sekar <sravanhome@gmail.com>
+ */
+
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/mp2629.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+enum {
+ MP2629_MFD_ADC,
+ MP2629_MFD_CHARGER,
+ MP2629_MFD_MAX
+};
+
+static const struct mfd_cell mp2629mfd[] = {
+ [MP2629_MFD_ADC] = {
+ .name = "mp2629_adc",
+ .of_compatible = "mps,mp2629_adc",
+ },
+ [MP2629_MFD_CHARGER] = {
+ .name = "mp2629_charger",
+ .of_compatible = "mps,mp2629_charger",
+ }
+};
+
+static const struct regmap_config mp2629_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = 0x17,
+};
+
+static int mp2629_probe(struct i2c_client *client)
+{
+ struct mp2629_info *ddata;
+ int ret;
+
+ ddata = devm_kzalloc(&client->dev, sizeof(*ddata), GFP_KERNEL);
+ if (!ddata)
+ return -ENOMEM;
+
+ ddata->dev = &client->dev;
+ i2c_set_clientdata(client, ddata);
+
+ ddata->regmap = devm_regmap_init_i2c(client, &mp2629_regmap_config);
+ if (IS_ERR(ddata->regmap)) {
+ dev_err(ddata->dev, "Failed to allocate regmap!\n");
+ return PTR_ERR(ddata->regmap);
+ }
+
+ ret = devm_mfd_add_devices(ddata->dev, PLATFORM_DEVID_NONE, mp2629mfd,
+ ARRAY_SIZE(mp2629mfd), NULL,
+ 0, NULL);
+ if (ret)
+ dev_err(ddata->dev, "Failed to register sub-devices %d\n", ret);
+
+ return ret;
+}
+
+static const struct of_device_id mp2629_of_match[] = {
+ { .compatible = "mps,mp2629"},
+ { }
+};
+MODULE_DEVICE_TABLE(of, mp2629_of_match);
+
+static struct i2c_driver mp2629_driver = {
+ .driver = {
+ .name = "mp2629",
+ .of_match_table = mp2629_of_match,
+ },
+ .probe_new = mp2629_probe,
+};
+module_i2c_driver(mp2629_driver);
+
+MODULE_AUTHOR("Saravanan Sekar <sravanhome@gmail.com>");
+MODULE_DESCRIPTION("MP2629 Battery charger parent driver");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/mp2629.h b/include/linux/mfd/mp2629.h
new file mode 100644
index 000000000000..06985e41fc6f
--- /dev/null
+++ b/include/linux/mfd/mp2629.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * register definitions for MP2629 charger
+ *
+ * Copyright 2020 Monolithic Power Systems, Inc
+ */
+
+#ifndef __MP2629_H__
+#define __MP2629_H__
+
+#include <linux/device.h>
+#include <linux/regmap.h>
+
+struct mp2629_info {
+ struct device *dev;
+ struct regmap *regmap;
+};
+
+#endif
--
2.17.1
^ permalink raw reply related [flat|nested] 11+ messages in thread
* [PATCH v7 3/5] iio: adc: mp2629: Add support for mp2629 ADC driver
2020-04-10 20:19 [PATCH v7 0/5] Add battery charger driver support for MP2629 Saravanan Sekar
2020-04-10 20:19 ` [PATCH v7 1/5] dt-bindings: mfd: add document bindings for mp2629 Saravanan Sekar
2020-04-10 20:19 ` [PATCH v7 2/5] mfd: mp2629: Add support for mps battery charger Saravanan Sekar
@ 2020-04-10 20:19 ` Saravanan Sekar
2020-04-12 9:58 ` Jonathan Cameron
2020-04-10 20:19 ` [PATCH v7 4/5] power: supply: Add support for mps mp2629 battery charger Saravanan Sekar
` (2 subsequent siblings)
5 siblings, 1 reply; 11+ messages in thread
From: Saravanan Sekar @ 2020-04-10 20:19 UTC (permalink / raw)
To: lee.jones, andy.shevchenko, robh+dt, jic23, knaack.h, lars, pmeerw, sre
Cc: devicetree, linux-kernel, linux-iio, linux-pm, Saravanan Sekar
Add support for 8-bit resolution ADC readings for input power
supply and battery charging measurement. Provides voltage, current
readings to mp2629 power supply driver.
Signed-off-by: Saravanan Sekar <sravanhome@gmail.com>
---
drivers/iio/adc/Kconfig | 10 ++
drivers/iio/adc/Makefile | 1 +
drivers/iio/adc/mp2629_adc.c | 208 +++++++++++++++++++++++++++++++++++
include/linux/mfd/mp2629.h | 9 ++
4 files changed, 228 insertions(+)
create mode 100644 drivers/iio/adc/mp2629_adc.c
diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
index 82e33082958c..ef0c0cd31855 100644
--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -680,6 +680,16 @@ config MESON_SARADC
To compile this driver as a module, choose M here: the
module will be called meson_saradc.
+config MP2629_ADC
+ tristate "Monolithic MP2629 ADC driver"
+ depends on MFD_MP2629
+ help
+ Say yes to have support for battery charger IC MP2629 ADC device
+ accessed over I2C.
+
+ This driver provides ADC conversion of system, input power supply
+ and battery voltage & current information.
+
config NAU7802
tristate "Nuvoton NAU7802 ADC driver"
depends on I2C
diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile
index 919228900df9..f14416c245a6 100644
--- a/drivers/iio/adc/Makefile
+++ b/drivers/iio/adc/Makefile
@@ -64,6 +64,7 @@ obj-$(CONFIG_MCP3911) += mcp3911.o
obj-$(CONFIG_MEDIATEK_MT6577_AUXADC) += mt6577_auxadc.o
obj-$(CONFIG_MEN_Z188_ADC) += men_z188_adc.o
obj-$(CONFIG_MESON_SARADC) += meson_saradc.o
+obj-$(CONFIG_MP2629_ADC) += mp2629_adc.o
obj-$(CONFIG_MXS_LRADC_ADC) += mxs-lradc-adc.o
obj-$(CONFIG_NAU7802) += nau7802.o
obj-$(CONFIG_NPCM_ADC) += npcm_adc.o
diff --git a/drivers/iio/adc/mp2629_adc.c b/drivers/iio/adc/mp2629_adc.c
new file mode 100644
index 000000000000..e32d5bbe97df
--- /dev/null
+++ b/drivers/iio/adc/mp2629_adc.c
@@ -0,0 +1,208 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * MP2629 Driver for ADC
+ *
+ * Copyright 2020 Monolithic Power Systems, Inc
+ *
+ * Author: Saravanan Sekar <sravanhome@gmail.com>
+ */
+
+#include <linux/iio/driver.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/machine.h>
+#include <linux/mfd/mp2629.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#define MP2629_REG_ADC_CTRL 0x03
+#define MP2629_REG_BATT_VOLT 0x0e
+#define MP2629_REG_SYSTEM_VOLT 0x0f
+#define MP2629_REG_INPUT_VOLT 0x11
+#define MP2629_REG_BATT_CURRENT 0x12
+#define MP2629_REG_INPUT_CURRENT 0x13
+
+#define MP2629_ADC_START BIT(7)
+#define MP2629_ADC_CONTINUOUS BIT(6)
+
+#define MP2629_MAP(_mp, _mpc) IIO_MAP(#_mp, "mp2629_charger", "mp2629-"_mpc)
+
+#define MP2629_ADC_CHAN(_ch, _type) { \
+ .type = _type, \
+ .indexed = 1, \
+ .datasheet_name = #_ch, \
+ .channel = MP2629_ ## _ch, \
+ .address = MP2629_REG_ ## _ch, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
+}
+
+struct mp2629_adc {
+ struct regmap *regmap;
+ struct device *dev;
+};
+
+static struct iio_chan_spec mp2629_channels[] = {
+ MP2629_ADC_CHAN(BATT_VOLT, IIO_VOLTAGE),
+ MP2629_ADC_CHAN(SYSTEM_VOLT, IIO_VOLTAGE),
+ MP2629_ADC_CHAN(INPUT_VOLT, IIO_VOLTAGE),
+ MP2629_ADC_CHAN(BATT_CURRENT, IIO_CURRENT),
+ MP2629_ADC_CHAN(INPUT_CURRENT, IIO_CURRENT)
+};
+
+static struct iio_map mp2629_adc_maps[] = {
+ MP2629_MAP(BATT_VOLT, "batt-volt"),
+ MP2629_MAP(SYSTEM_VOLT, "system-volt"),
+ MP2629_MAP(INPUT_VOLT, "input-volt"),
+ MP2629_MAP(BATT_CURRENT, "batt-current"),
+ MP2629_MAP(INPUT_CURRENT, "input-current")
+};
+
+static int mp2629_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct mp2629_adc *info = iio_priv(indio_dev);
+ unsigned int rval;
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ ret = regmap_read(info->regmap, chan->address, &rval);
+ if (ret)
+ return ret;
+
+ if (chan->address == MP2629_INPUT_VOLT)
+ rval &= GENMASK(6, 0);
+ *val = rval;
+ return IIO_VAL_INT;
+
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->channel) {
+ case MP2629_BATT_VOLT:
+ case MP2629_SYSTEM_VOLT:
+ *val = 20;
+ return IIO_VAL_INT;
+
+ case MP2629_INPUT_VOLT:
+ *val = 60;
+ return IIO_VAL_INT;
+
+ case MP2629_BATT_CURRENT:
+ *val = 175;
+ *val2 = 10;
+ return IIO_VAL_FRACTIONAL;
+
+ case MP2629_INPUT_CURRENT:
+ *val = 133;
+ *val2 = 10;
+ return IIO_VAL_FRACTIONAL;
+
+ default:
+ return -EINVAL;
+ }
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static const struct iio_info mp2629_adc_info = {
+ .read_raw = &mp2629_read_raw,
+};
+
+static int mp2629_adc_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct mp2629_info *ddata = dev_get_drvdata(dev->parent);
+ struct mp2629_adc *info;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(dev, sizeof(*info));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ info = iio_priv(indio_dev);
+ info->regmap = ddata->regmap;
+ info->dev = dev;
+ platform_set_drvdata(pdev, indio_dev);
+
+ ret = iio_map_array_register(indio_dev, mp2629_adc_maps);
+ if (ret) {
+ dev_err(dev, "IIO maps register fail: %d\n", ret);
+ return ret;
+ }
+
+ indio_dev->name = "mp2629-adc";
+ indio_dev->dev.parent = dev;
+ indio_dev->channels = mp2629_channels;
+ indio_dev->num_channels = ARRAY_SIZE(mp2629_channels);
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->info = &mp2629_adc_info;
+
+ ret = regmap_update_bits(ddata->regmap, MP2629_REG_ADC_CTRL,
+ MP2629_ADC_START | MP2629_ADC_CONTINUOUS,
+ MP2629_ADC_START | MP2629_ADC_CONTINUOUS);
+ if (ret) {
+ dev_err(dev, "adc enable fail: %d\n", ret);
+ goto fail_unmap;
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret) {
+ dev_err(dev, "IIO device register fail: %d\n", ret);
+ goto fail_disable;
+ }
+
+ return 0;
+
+fail_disable:
+ regmap_update_bits(ddata->regmap, MP2629_REG_ADC_CTRL,
+ MP2629_ADC_CONTINUOUS, 0);
+ regmap_update_bits(ddata->regmap, MP2629_REG_ADC_CTRL,
+ MP2629_ADC_START, 0);
+
+fail_unmap:
+ iio_map_array_unregister(indio_dev);
+
+ return ret;
+}
+
+static int mp2629_adc_remove(struct platform_device *pdev)
+{
+ struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+ struct mp2629_adc *info = iio_priv(indio_dev);
+
+ iio_map_array_unregister(indio_dev);
+
+ regmap_update_bits(info->regmap, MP2629_REG_ADC_CTRL,
+ MP2629_ADC_CONTINUOUS, 0);
+ regmap_update_bits(info->regmap, MP2629_REG_ADC_CTRL,
+ MP2629_ADC_START, 0);
+
+ iio_device_unregister(indio_dev);
+
+ return 0;
+}
+
+static const struct of_device_id mp2629_adc_of_match[] = {
+ { .compatible = "mps,mp2629_adc"},
+ {}
+};
+MODULE_DEVICE_TABLE(of, mp2629_adc_of_match);
+
+static struct platform_driver mp2629_adc_driver = {
+ .driver = {
+ .name = "mp2629_adc",
+ .of_match_table = mp2629_adc_of_match,
+ },
+ .probe = mp2629_adc_probe,
+ .remove = mp2629_adc_remove,
+};
+module_platform_driver(mp2629_adc_driver);
+
+MODULE_AUTHOR("Saravanan Sekar <sravanhome@gmail.com>");
+MODULE_DESCRIPTION("MP2629 ADC driver");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/mp2629.h b/include/linux/mfd/mp2629.h
index 06985e41fc6f..83ebfab41691 100644
--- a/include/linux/mfd/mp2629.h
+++ b/include/linux/mfd/mp2629.h
@@ -16,4 +16,13 @@ struct mp2629_info {
struct regmap *regmap;
};
+enum mp2629_adc_chan {
+ MP2629_BATT_VOLT,
+ MP2629_SYSTEM_VOLT,
+ MP2629_INPUT_VOLT,
+ MP2629_BATT_CURRENT,
+ MP2629_INPUT_CURRENT,
+ MP2629_ADC_CHAN_END
+};
+
#endif
--
2.17.1
^ permalink raw reply related [flat|nested] 11+ messages in thread
* [PATCH v7 4/5] power: supply: Add support for mps mp2629 battery charger
2020-04-10 20:19 [PATCH v7 0/5] Add battery charger driver support for MP2629 Saravanan Sekar
` (2 preceding siblings ...)
2020-04-10 20:19 ` [PATCH v7 3/5] iio: adc: mp2629: Add support for mp2629 ADC driver Saravanan Sekar
@ 2020-04-10 20:19 ` Saravanan Sekar
2020-04-11 10:15 ` Andy Shevchenko
2020-04-13 20:40 ` Sebastian Reichel
2020-04-10 20:19 ` [PATCH v7 5/5] MAINTAINERS: Add entry for mp2629 Battery Charger driver Saravanan Sekar
2020-04-11 10:16 ` [PATCH v7 0/5] Add battery charger driver support for MP2629 Andy Shevchenko
5 siblings, 2 replies; 11+ messages in thread
From: Saravanan Sekar @ 2020-04-10 20:19 UTC (permalink / raw)
To: lee.jones, andy.shevchenko, robh+dt, jic23, knaack.h, lars, pmeerw, sre
Cc: devicetree, linux-kernel, linux-iio, linux-pm, Saravanan Sekar
The mp2629 provides switching-mode battery charge management for
single-cell Li-ion or Li-polymer battery. Driver supports the
access/control input source and battery charging parameters.
Signed-off-by: Saravanan Sekar <sravanhome@gmail.com>
---
drivers/power/supply/Kconfig | 10 +
drivers/power/supply/Makefile | 1 +
drivers/power/supply/mp2629_charger.c | 687 ++++++++++++++++++++++++++
3 files changed, 698 insertions(+)
create mode 100644 drivers/power/supply/mp2629_charger.c
diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index f3424fdce341..05b3f66946ad 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -541,6 +541,16 @@ config CHARGER_MAX8998
Say Y to enable support for the battery charger control sysfs and
platform data of MAX8998/LP3974 PMICs.
+config CHARGER_MP2629
+ tristate "Monolithic power system MP2629 Battery charger"
+ depends on MFD_MP2629
+ depends on MP2629_ADC
+ depends on IIO
+ help
+ Select this option to enable support for Monolithic power system
+ Battery charger. This driver provies Battery charger power management
+ functions on the systems.
+
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 6c7da920ea83..41cb64f09e49 100644
--- a/drivers/power/supply/Makefile
+++ b/drivers/power/supply/Makefile
@@ -75,6 +75,7 @@ obj-$(CONFIG_CHARGER_MAX77650) += max77650-charger.o
obj-$(CONFIG_CHARGER_MAX77693) += max77693_charger.o
obj-$(CONFIG_CHARGER_MAX8997) += max8997_charger.o
obj-$(CONFIG_CHARGER_MAX8998) += max8998_charger.o
+obj-$(CONFIG_CHARGER_MP2629) += mp2629_charger.o
obj-$(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/mp2629_charger.c b/drivers/power/supply/mp2629_charger.c
new file mode 100644
index 000000000000..279edfe383ee
--- /dev/null
+++ b/drivers/power/supply/mp2629_charger.c
@@ -0,0 +1,687 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * MP2629 battery charger driver
+ *
+ * Copyright 2020 Monolithic Power Systems, Inc
+ *
+ * Author: Saravanan Sekar <sravanhome@gmail.com>
+ */
+
+#include <linux/bits.h>
+#include <linux/iio/consumer.h>
+#include <linux/iio/types.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/mp2629.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/regmap.h>
+#include <linux/workqueue.h>
+
+#define MP2629_REG_INPUT_ILIM 0x00
+#define MP2629_REG_INPUT_VLIM 0x01
+#define MP2629_REG_CHARGE_CTRL 0x04
+#define MP2629_REG_CHARGE_ILIM 0x05
+#define MP2629_REG_PRECHARGE 0x06
+#define MP2629_REG_TERM_CURRENT 0x06
+#define MP2629_REG_CHARGE_VLIM 0x07
+#define MP2629_REG_TIMER_CTRL 0x08
+#define MP2629_REG_IMPEDANCE_COMP 0x09
+#define MP2629_REG_INTERRUPT 0x0b
+#define MP2629_REG_STATUS 0x0c
+#define MP2629_REG_FAULT 0x0d
+
+#define MP2629_MASK_INPUT_TYPE GENMASK(7, 5)
+#define MP2629_MASK_CHARGE_TYPE GENMASK(4, 3)
+#define MP2629_MASK_CHARGE_CTRL GENMASK(5, 4)
+#define MP2629_MASK_WDOG_CTRL GENMASK(5, 4)
+#define MP2629_MASK_IMPEDANCE GENMASK(7, 4)
+
+#define MP2629_INPUTSOURCE_CHANGE GENMASK(7, 5)
+#define MP2629_CHARGING_CHANGE GENMASK(4, 3)
+#define MP2629_FAULT_BATTERY BIT(3)
+#define MP2629_FAULT_THERMAL BIT(4)
+#define MP2629_FAULT_INPUT BIT(5)
+#define MP2629_FAULT_OTG BIT(6)
+
+#define MP2629_MAX_BATT_CAPACITY 100
+
+#define MP2629_PROPS(_idx, _min, _max, _step) \
+ [_idx] = { \
+ .min = _min, \
+ .max = _max, \
+ .step = _step, \
+}
+
+enum mp2629_source_type {
+ MP2629_SOURCE_TYPE_NO_INPUT,
+ MP2629_SOURCE_TYPE_NON_STD,
+ MP2629_SOURCE_TYPE_SDP,
+ MP2629_SOURCE_TYPE_CDP,
+ MP2629_SOURCE_TYPE_DCP,
+ MP2629_SOURCE_TYPE_OTG = 7,
+};
+
+enum mp2629_field {
+ INPUT_ILIM,
+ INPUT_VLIM,
+ CHARGE_ILIM,
+ CHARGE_VLIM,
+ PRECHARGE,
+ TERM_CURRENT,
+ MP2629_MAX_FIELD
+};
+
+struct mp2629_charger {
+ struct device *dev;
+ struct work_struct charger_work;
+ int status;
+ int fault;
+
+ struct regmap *regmap;
+ struct regmap_field *regmap_fields[MP2629_MAX_FIELD];
+ struct mutex lock;
+ struct power_supply *usb;
+ struct power_supply *battery;
+ struct iio_channel *iiochan[MP2629_ADC_CHAN_END];
+};
+
+struct mp2629_prop {
+ int reg;
+ int mask;
+ int min;
+ int max;
+ int step;
+ int shift;
+};
+
+static enum power_supply_usb_type mp2629_usb_types[] = {
+ POWER_SUPPLY_USB_TYPE_SDP,
+ POWER_SUPPLY_USB_TYPE_DCP,
+ POWER_SUPPLY_USB_TYPE_CDP,
+ POWER_SUPPLY_USB_TYPE_PD_DRP,
+ POWER_SUPPLY_USB_TYPE_UNKNOWN
+};
+
+static enum power_supply_property mp2629_charger_usb_props[] = {
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_USB_TYPE,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_CURRENT_NOW,
+ POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
+ POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
+};
+
+static enum power_supply_property mp2629_charger_bat_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_CHARGE_TYPE,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_CURRENT_NOW,
+ POWER_SUPPLY_PROP_CAPACITY,
+ POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
+ POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
+};
+
+static struct mp2629_prop props[] = {
+ MP2629_PROPS(INPUT_ILIM, 100000, 3250000, 50000),
+ MP2629_PROPS(INPUT_VLIM, 3800000, 5300000, 100000),
+ MP2629_PROPS(CHARGE_ILIM, 320000, 4520000, 40000),
+ MP2629_PROPS(CHARGE_VLIM, 3400000, 4670000, 10000),
+ MP2629_PROPS(PRECHARGE, 120000, 720000, 40000),
+ MP2629_PROPS(TERM_CURRENT, 80000, 680000, 40000),
+};
+
+static const struct reg_field mp2629_reg_fields[] = {
+ [INPUT_ILIM] = REG_FIELD(MP2629_REG_INPUT_ILIM, 0, 5),
+ [INPUT_VLIM] = REG_FIELD(MP2629_REG_INPUT_VLIM, 0, 3),
+ [CHARGE_ILIM] = REG_FIELD(MP2629_REG_CHARGE_ILIM, 0, 6),
+ [CHARGE_VLIM] = REG_FIELD(MP2629_REG_CHARGE_VLIM, 1, 7),
+ [PRECHARGE] = REG_FIELD(MP2629_REG_PRECHARGE, 4, 7),
+ [TERM_CURRENT] = REG_FIELD(MP2629_REG_TERM_CURRENT, 0, 3),
+};
+
+static char *adc_chan_name[] = {
+ "mp2629-batt-volt",
+ "mp2629-system-volt",
+ "mp2629-input-volt",
+ "mp2629-batt-current",
+ "mp2629-input-current",
+};
+
+static int mp2629_read_adc(struct mp2629_charger *charger,
+ enum mp2629_adc_chan ch,
+ union power_supply_propval *val)
+{
+ int ret;
+ int chval;
+
+ ret = iio_read_channel_processed(charger->iiochan[ch], &chval);
+ if (ret)
+ return ret;
+
+ val->intval = chval * 1000;
+
+ return 0;
+}
+
+static int mp2629_get_prop(struct mp2629_charger *charger,
+ enum mp2629_field fld,
+ union power_supply_propval *val)
+{
+ int ret;
+ unsigned int rval;
+
+ ret = regmap_field_read(charger->regmap_fields[fld], &rval);
+ if (ret)
+ return ret;
+
+ val->intval = rval * props[fld].step + props[fld].min;
+
+ return 0;
+}
+
+static int mp2629_set_prop(struct mp2629_charger *charger,
+ enum mp2629_field fld,
+ const union power_supply_propval *val)
+{
+ unsigned int rval;
+
+ if (val->intval < props[fld].min || val->intval > props[fld].max)
+ return -EINVAL;
+
+ rval = (val->intval - props[fld].min) / props[fld].step;
+ return regmap_field_write(charger->regmap_fields[fld], rval);
+}
+
+static int mp2629_get_battery_capacity(struct mp2629_charger *charger,
+ union power_supply_propval *val)
+{
+ union power_supply_propval vnow, vlim;
+ int ret;
+
+ ret = mp2629_read_adc(charger, MP2629_BATT_VOLT, &vnow);
+ if (ret)
+ return ret;
+
+ ret = mp2629_get_prop(charger, CHARGE_VLIM, &vlim);
+ if (ret)
+ return ret;
+
+ val->intval = (vnow.intval * 100) / vlim.intval;
+ val->intval = min(val->intval, MP2629_MAX_BATT_CAPACITY);
+
+ return 0;
+}
+
+static int mp2629_charger_battery_get_prop(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct mp2629_charger *charger = dev_get_drvdata(psy->dev.parent);
+ unsigned int rval;
+ int ret = 0;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ ret = mp2629_read_adc(charger, MP2629_BATT_VOLT, val);
+ break;
+
+ case POWER_SUPPLY_PROP_CURRENT_NOW:
+ ret = mp2629_read_adc(charger, MP2629_BATT_CURRENT, val);
+ break;
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+ val->intval = 4520000;
+ break;
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+ val->intval = 4670000;
+ break;
+
+ case POWER_SUPPLY_PROP_CAPACITY:
+ ret = mp2629_get_battery_capacity(charger, val);
+ break;
+
+ case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+ ret = mp2629_get_prop(charger, TERM_CURRENT, val);
+ break;
+
+ case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+ ret = mp2629_get_prop(charger, PRECHARGE, val);
+ break;
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ ret = mp2629_get_prop(charger, CHARGE_VLIM, val);
+ break;
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+ ret = mp2629_get_prop(charger, CHARGE_ILIM, val);
+ break;
+
+ case POWER_SUPPLY_PROP_HEALTH:
+ if (!charger->fault)
+ val->intval = POWER_SUPPLY_HEALTH_GOOD;
+ if (MP2629_FAULT_BATTERY & charger->fault)
+ val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ else if (MP2629_FAULT_THERMAL & charger->fault)
+ val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
+ else if (MP2629_FAULT_INPUT & charger->fault)
+ val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ break;
+
+ case POWER_SUPPLY_PROP_STATUS:
+ ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
+ if (ret)
+ break;
+
+ rval = (rval & MP2629_MASK_CHARGE_TYPE) >> 3;
+ switch (rval) {
+ case 0x00:
+ val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ break;
+ case 0x01:
+ case 0x10:
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ break;
+ case 0x11:
+ val->intval = POWER_SUPPLY_STATUS_FULL;
+ }
+ break;
+
+ case POWER_SUPPLY_PROP_CHARGE_TYPE:
+ ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
+ if (ret)
+ break;
+
+ rval = (rval & MP2629_MASK_CHARGE_TYPE) >> 3;
+ switch (rval) {
+ case 0x00:
+ val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
+ break;
+ case 0x01:
+ val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+ break;
+ case 0x10:
+ val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
+ break;
+ default:
+ val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
+ }
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+static int mp2629_charger_battery_set_prop(struct power_supply *psy,
+ enum power_supply_property psp,
+ const union power_supply_propval *val)
+{
+ struct mp2629_charger *charger = dev_get_drvdata(psy->dev.parent);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+ return mp2629_set_prop(charger, TERM_CURRENT, val);
+
+ case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+ return mp2629_set_prop(charger, PRECHARGE, val);
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ return mp2629_set_prop(charger, CHARGE_VLIM, val);
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+ return mp2629_set_prop(charger, CHARGE_ILIM, val);
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int mp2629_charger_usb_get_prop(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct mp2629_charger *charger = dev_get_drvdata(psy->dev.parent);
+ unsigned int rval;
+ int ret;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
+ if (ret)
+ break;
+
+ val->intval = !!(rval & MP2629_MASK_INPUT_TYPE);
+ break;
+
+ case POWER_SUPPLY_PROP_USB_TYPE:
+ ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
+ if (ret)
+ break;
+
+ rval = (rval & MP2629_MASK_INPUT_TYPE) >> 5;
+ switch (rval) {
+ case MP2629_SOURCE_TYPE_SDP:
+ val->intval = POWER_SUPPLY_USB_TYPE_SDP;
+ break;
+ case MP2629_SOURCE_TYPE_CDP:
+ val->intval = POWER_SUPPLY_USB_TYPE_CDP;
+ break;
+ case MP2629_SOURCE_TYPE_DCP:
+ val->intval = POWER_SUPPLY_USB_TYPE_DCP;
+ break;
+ case MP2629_SOURCE_TYPE_OTG:
+ val->intval = POWER_SUPPLY_USB_TYPE_PD_DRP;
+ break;
+ default:
+ val->intval = POWER_SUPPLY_USB_TYPE_UNKNOWN;
+ break;
+ }
+ break;
+
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ ret = mp2629_read_adc(charger, MP2629_INPUT_VOLT, val);
+ break;
+
+ case POWER_SUPPLY_PROP_CURRENT_NOW:
+ ret = mp2629_read_adc(charger, MP2629_INPUT_CURRENT, val);
+ break;
+
+ case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
+ ret = mp2629_get_prop(charger, INPUT_VLIM, val);
+ break;
+
+ case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+ ret = mp2629_get_prop(charger, INPUT_ILIM, val);
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+static int mp2629_charger_usb_set_prop(struct power_supply *psy,
+ enum power_supply_property psp,
+ const union power_supply_propval *val)
+{
+ struct mp2629_charger *charger = dev_get_drvdata(psy->dev.parent);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
+ return mp2629_set_prop(charger, INPUT_VLIM, val);
+
+ case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+ return mp2629_set_prop(charger, INPUT_ILIM, val);
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int mp2629_charger_battery_prop_writeable(struct power_supply *psy,
+ enum power_supply_property psp)
+{
+ return (psp == POWER_SUPPLY_PROP_PRECHARGE_CURRENT) ||
+ (psp == POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT) ||
+ (psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT) ||
+ (psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE);
+}
+
+static int mp2629_charger_usb_prop_writeable(struct power_supply *psy,
+ enum power_supply_property psp)
+{
+ return (psp == POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT) ||
+ (psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT);
+}
+
+static void mp2629_charger_work(struct work_struct *work)
+{
+ struct mp2629_charger *charger;
+ unsigned int rval;
+ int ret;
+
+ charger = container_of(work, struct mp2629_charger, charger_work);
+
+ mutex_lock(&charger->lock);
+
+ ret = regmap_read(charger->regmap, MP2629_REG_FAULT, &rval);
+ if (ret)
+ goto unlock;
+
+ if (rval) {
+ charger->fault = rval;
+ if (MP2629_FAULT_BATTERY & rval)
+ dev_err(charger->dev, "Battery fault OVP");
+ else if (MP2629_FAULT_THERMAL & rval)
+ dev_err(charger->dev, "Thermal shutdown fault");
+ else if (MP2629_FAULT_INPUT & rval)
+ dev_err(charger->dev, "no input or input OVP");
+ else if (MP2629_FAULT_OTG & rval)
+ dev_err(charger->dev, "VIN overloaded");
+
+ goto unlock;
+ }
+
+ ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
+ if (ret)
+ goto unlock;
+
+ if (rval & MP2629_INPUTSOURCE_CHANGE)
+ power_supply_changed(charger->usb);
+ else if (rval & MP2629_CHARGING_CHANGE)
+ power_supply_changed(charger->battery);
+
+unlock:
+ mutex_unlock(&charger->lock);
+}
+
+static irqreturn_t mp2629_irq_handler(int irq, void *dev_id)
+{
+ struct mp2629_charger *charger = dev_id;
+
+ schedule_work(&charger->charger_work);
+ return IRQ_HANDLED;
+}
+
+static const struct power_supply_desc mp2629_usb_desc = {
+ .name = "mp2629_usb",
+ .type = POWER_SUPPLY_TYPE_USB,
+ .usb_types = mp2629_usb_types,
+ .num_usb_types = ARRAY_SIZE(mp2629_usb_types),
+ .properties = mp2629_charger_usb_props,
+ .num_properties = ARRAY_SIZE(mp2629_charger_usb_props),
+ .get_property = mp2629_charger_usb_get_prop,
+ .set_property = mp2629_charger_usb_set_prop,
+ .property_is_writeable = mp2629_charger_usb_prop_writeable,
+};
+
+static const struct power_supply_desc mp2629_battery_desc = {
+ .name = "mp2629_battery",
+ .type = POWER_SUPPLY_TYPE_BATTERY,
+ .properties = mp2629_charger_bat_props,
+ .num_properties = ARRAY_SIZE(mp2629_charger_bat_props),
+ .get_property = mp2629_charger_battery_get_prop,
+ .set_property = mp2629_charger_battery_set_prop,
+ .property_is_writeable = mp2629_charger_battery_prop_writeable,
+};
+
+static ssize_t batt_impedance_compensation_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct mp2629_charger *charger = dev_get_drvdata(dev->parent);
+ unsigned int rval;
+ int ret;
+
+ ret = regmap_read(charger->regmap, MP2629_REG_IMPEDANCE_COMP, &rval);
+ if (ret)
+ return ret;
+
+ rval = (rval >> 4) * 10;
+ return sprintf(buf, "%d mohm\n", rval);
+}
+
+static ssize_t batt_impedance_compensation_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ struct mp2629_charger *charger = dev_get_drvdata(dev->parent);
+ unsigned int val;
+ int ret;
+
+ ret = kstrtouint(buf, 10, &val);
+ if (ret)
+ return ret;
+
+ if (val > 140)
+ return -ERANGE;
+
+ /* multiples of 10 mohm so round off */
+ val = val / 10;
+ ret = regmap_update_bits(charger->regmap, MP2629_REG_IMPEDANCE_COMP,
+ MP2629_MASK_IMPEDANCE, val << 4);
+ if (ret)
+ return ret;
+
+ return count;
+}
+
+static DEVICE_ATTR_RW(batt_impedance_compensation);
+
+static struct attribute *mp2629_charger_sysfs_attrs[] = {
+ &dev_attr_batt_impedance_compensation.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(mp2629_charger_sysfs);
+
+static int mp2629_charger_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct mp2629_info *ddata = dev_get_drvdata(dev->parent);
+ struct mp2629_charger *charger;
+ struct power_supply_config psy_cfg = {};
+ int ret, i, irq;
+
+ charger = devm_kzalloc(dev, sizeof(*charger), GFP_KERNEL);
+ if (!charger)
+ return -ENOMEM;
+
+ charger->regmap = ddata->regmap;
+ charger->dev = dev;
+ platform_set_drvdata(pdev, charger);
+
+ for (i = 0; i < MP2629_MAX_FIELD; i++) {
+ charger->regmap_fields[i] = devm_regmap_field_alloc(dev,
+ charger->regmap, mp2629_reg_fields[i]);
+ if (IS_ERR(charger->regmap_fields[i])) {
+ dev_err(dev, "regmap field alloc fail %d\n", i);
+ return PTR_ERR(charger->regmap_fields[i]);
+ }
+ }
+
+ for (i = 0; i < MP2629_ADC_CHAN_END; i++) {
+ charger->iiochan[i] = iio_channel_get(dev, adc_chan_name[i]);
+ if (IS_ERR(charger->iiochan[i])) {
+ ret = PTR_ERR(charger->iiochan[i]);
+ goto iio_fail;
+ }
+ }
+
+ charger->usb = devm_power_supply_register(dev, &mp2629_usb_desc, NULL);
+ if (IS_ERR(charger->usb)) {
+ ret = PTR_ERR(charger->usb);
+ goto iio_fail;
+ }
+
+ psy_cfg.drv_data = charger;
+ psy_cfg.attr_grp = mp2629_charger_sysfs_groups;
+ charger->battery = devm_power_supply_register(dev,
+ &mp2629_battery_desc, &psy_cfg);
+ if (IS_ERR(charger->battery)) {
+ ret = PTR_ERR(charger->battery);
+ goto iio_fail;
+ }
+
+ ret = regmap_update_bits(charger->regmap, MP2629_REG_CHARGE_CTRL,
+ MP2629_MASK_CHARGE_CTRL, BIT(4));
+ if (ret) {
+ dev_err(dev, "enable charge fail: %d\n", ret);
+ goto iio_fail;
+ }
+
+ regmap_update_bits(charger->regmap, MP2629_REG_TIMER_CTRL,
+ MP2629_MASK_WDOG_CTRL, 0);
+
+ INIT_WORK(&charger->charger_work, mp2629_charger_work);
+ mutex_init(&charger->lock);
+
+ irq = platform_get_irq(to_platform_device(pdev->dev.parent), 0);
+ if (irq) {
+ ret = devm_request_irq(dev, irq, mp2629_irq_handler,
+ IRQF_TRIGGER_RISING, "mp2629-charger",
+ charger);
+ if (ret) {
+ dev_err(dev, "failed to request gpio IRQ\n");
+ goto iio_fail;
+ }
+ }
+
+ regmap_update_bits(charger->regmap, MP2629_REG_INTERRUPT,
+ GENMASK(6, 5), BIT(6) | BIT(5));
+
+ return 0;
+
+iio_fail:
+ while (i--)
+ iio_channel_release(charger->iiochan[i]);
+
+ dev_err(dev, "driver register fail: %d\n", ret);
+ return ret;
+}
+
+static int mp2629_charger_remove(struct platform_device *pdev)
+{
+ struct mp2629_charger *charger = platform_get_drvdata(pdev);
+ int i;
+
+ cancel_work_sync(&charger->charger_work);
+
+ for (i = 0; i < MP2629_ADC_CHAN_END; i++)
+ iio_channel_release(charger->iiochan[i]);
+
+ regmap_update_bits(charger->regmap, MP2629_REG_CHARGE_CTRL,
+ MP2629_MASK_CHARGE_CTRL, 0);
+ return 0;
+}
+
+static const struct of_device_id mp2629_charger_of_match[] = {
+ { .compatible = "mps,mp2629_charger"},
+ {}
+};
+MODULE_DEVICE_TABLE(of, mp2629_charger_of_match);
+
+static struct platform_driver mp2629_charger_driver = {
+ .driver = {
+ .name = "mp2629_charger",
+ .of_match_table = mp2629_charger_of_match,
+ },
+ .probe = mp2629_charger_probe,
+ .remove = mp2629_charger_remove,
+};
+module_platform_driver(mp2629_charger_driver);
+
+MODULE_AUTHOR("Saravanan Sekar <sravanhome@gmail.com>");
+MODULE_DESCRIPTION("MP2629 Charger driver");
+MODULE_LICENSE("GPL");
--
2.17.1
^ permalink raw reply related [flat|nested] 11+ messages in thread
* [PATCH v7 5/5] MAINTAINERS: Add entry for mp2629 Battery Charger driver
2020-04-10 20:19 [PATCH v7 0/5] Add battery charger driver support for MP2629 Saravanan Sekar
` (3 preceding siblings ...)
2020-04-10 20:19 ` [PATCH v7 4/5] power: supply: Add support for mps mp2629 battery charger Saravanan Sekar
@ 2020-04-10 20:19 ` Saravanan Sekar
2020-04-11 10:16 ` [PATCH v7 0/5] Add battery charger driver support for MP2629 Andy Shevchenko
5 siblings, 0 replies; 11+ messages in thread
From: Saravanan Sekar @ 2020-04-10 20:19 UTC (permalink / raw)
To: lee.jones, andy.shevchenko, robh+dt, jic23, knaack.h, lars, pmeerw, sre
Cc: devicetree, linux-kernel, linux-iio, linux-pm, Saravanan Sekar
Add MAINTAINERS entry for Monolithic Power Systems mp2629 Charger driver.
Signed-off-by: Saravanan Sekar <sravanhome@gmail.com>
---
MAINTAINERS | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index 32a95d162f06..0f82d5a7a614 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -11358,10 +11358,15 @@ F: drivers/tty/mxser.*
MONOLITHIC POWER SYSTEM PMIC DRIVER
M: Saravanan Sekar <sravanhome@gmail.com>
S: Maintained
+F: Documentation/devicetree/bindings/mfd/mps,mp2629.yaml
F: Documentation/devicetree/bindings/regulator/mps,mp*.yaml
+F: drivers/iio/adc/mp2629_adc.c
+F: drivers/mfd/mp2629.c
+F: drivers/power/supply/mp2629_charger.c
F: drivers/regulator/mp5416.c
F: drivers/regulator/mpq7920.c
F: drivers/regulator/mpq7920.h
+F: include/linux/mfd/mp2629.h
MR800 AVERMEDIA USB FM RADIO DRIVER
M: Alexey Klimov <klimov.linux@gmail.com>
--
2.17.1
^ permalink raw reply related [flat|nested] 11+ messages in thread
* Re: [PATCH v7 4/5] power: supply: Add support for mps mp2629 battery charger
2020-04-10 20:19 ` [PATCH v7 4/5] power: supply: Add support for mps mp2629 battery charger Saravanan Sekar
@ 2020-04-11 10:15 ` Andy Shevchenko
2020-04-13 20:40 ` Sebastian Reichel
1 sibling, 0 replies; 11+ messages in thread
From: Andy Shevchenko @ 2020-04-11 10:15 UTC (permalink / raw)
To: Saravanan Sekar
Cc: Lee Jones, Rob Herring, Jonathan Cameron, Hartmut Knaack,
Lars-Peter Clausen, Peter Meerwald, Sebastian Reichel,
devicetree, Linux Kernel Mailing List, linux-iio, Linux PM
On Fri, Apr 10, 2020 at 11:20 PM Saravanan Sekar <sravanhome@gmail.com> wrote:
>
> The mp2629 provides switching-mode battery charge management for
> single-cell Li-ion or Li-polymer battery. Driver supports the
> access/control input source and battery charging parameters.
...
> +static DEVICE_ATTR_RW(batt_impedance_compensation);
> +
> +static struct attribute *mp2629_charger_sysfs_attrs[] = {
> + &dev_attr_batt_impedance_compensation.attr,
> + NULL
> +};
> +ATTRIBUTE_GROUPS(mp2629_charger_sysfs);
Did I miss ABI documentation?
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v7 0/5] Add battery charger driver support for MP2629
2020-04-10 20:19 [PATCH v7 0/5] Add battery charger driver support for MP2629 Saravanan Sekar
` (4 preceding siblings ...)
2020-04-10 20:19 ` [PATCH v7 5/5] MAINTAINERS: Add entry for mp2629 Battery Charger driver Saravanan Sekar
@ 2020-04-11 10:16 ` Andy Shevchenko
5 siblings, 0 replies; 11+ messages in thread
From: Andy Shevchenko @ 2020-04-11 10:16 UTC (permalink / raw)
To: Saravanan Sekar
Cc: Lee Jones, Rob Herring, Jonathan Cameron, Hartmut Knaack,
Lars-Peter Clausen, Peter Meerwald, Sebastian Reichel,
devicetree, Linux Kernel Mailing List, linux-iio, Linux PM
On Fri, Apr 10, 2020 at 11:19 PM Saravanan Sekar <sravanhome@gmail.com> wrote:
>
> changes in v7:
> - fixed probe/remove order, managed and unmanaged call mix use in adc.
> - Documentation dual license, i2c node with controller address
Overall looks good to me, FWIW,
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
One question though in reply to patch 4.
> changes in v6:
> - removed includes types.h in mfd, of_device.h in adc.
> - fixed review comments parentheses, err check, kstrtouint
>
> changes in v5:
> - removed platfrom data stored in mfd and directly accessed mfd struct in child
> - fixed spell check and capitalization in mfd and documentation
>
> changes in v4:
> - fixed capitalization in mfg Kconfig and documentation
>
> changes in v3:
> - regmap for children passed using platform data and remove mfd driver info
> access directly from children
>
> changes in v2:
> - removed EXPORT_SYMBOL of register set/get helper
> - regmap bit filed used, fixed other review comments
>
> This patch series add support for Battery charger control driver for Monolithic
> Power System's MP2629 chipset, includes MFD driver for ADC battery & input
> power supply measurement and battery charger control driver.
>
> Thanks,
> Saravanan
>
> Saravanan Sekar (5):
> dt-bindings: mfd: add document bindings for mp2629
> mfd: mp2629: Add support for mps battery charger
> iio: adc: mp2629: Add support for mp2629 ADC driver
> power: supply: Add support for mps mp2629 battery charger
> MAINTAINERS: Add entry for mp2629 Battery Charger driver
>
> .../devicetree/bindings/mfd/mps,mp2629.yaml | 60 ++
> MAINTAINERS | 5 +
> drivers/iio/adc/Kconfig | 10 +
> drivers/iio/adc/Makefile | 1 +
> drivers/iio/adc/mp2629_adc.c | 208 ++++++
> drivers/mfd/Kconfig | 9 +
> drivers/mfd/Makefile | 2 +
> drivers/mfd/mp2629.c | 86 +++
> drivers/power/supply/Kconfig | 10 +
> drivers/power/supply/Makefile | 1 +
> drivers/power/supply/mp2629_charger.c | 687 ++++++++++++++++++
> include/linux/mfd/mp2629.h | 28 +
> 12 files changed, 1107 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/mfd/mps,mp2629.yaml
> create mode 100644 drivers/iio/adc/mp2629_adc.c
> create mode 100644 drivers/mfd/mp2629.c
> create mode 100644 drivers/power/supply/mp2629_charger.c
> create mode 100644 include/linux/mfd/mp2629.h
>
> --
> 2.17.1
>
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v7 3/5] iio: adc: mp2629: Add support for mp2629 ADC driver
2020-04-10 20:19 ` [PATCH v7 3/5] iio: adc: mp2629: Add support for mp2629 ADC driver Saravanan Sekar
@ 2020-04-12 9:58 ` Jonathan Cameron
0 siblings, 0 replies; 11+ messages in thread
From: Jonathan Cameron @ 2020-04-12 9:58 UTC (permalink / raw)
To: Saravanan Sekar
Cc: lee.jones, andy.shevchenko, robh+dt, knaack.h, lars, pmeerw, sre,
devicetree, linux-kernel, linux-iio, linux-pm
On Fri, 10 Apr 2020 22:19:46 +0200
Saravanan Sekar <sravanhome@gmail.com> wrote:
> Add support for 8-bit resolution ADC readings for input power
> supply and battery charging measurement. Provides voltage, current
> readings to mp2629 power supply driver.
>
> Signed-off-by: Saravanan Sekar <sravanhome@gmail.com>
I got a bit hung up on the double free in the previous version so didn't
mention that the ordering was also fundamentally wrong in remove.
It should be the reverse of that done in probe so that we go through
a consistent set of states in each direction.
Also a note inline about registering the map, and hence allowing in kernel
users before the device is turned on which seems a bit odd.
Otherwise looks good,
Jonathan
> ---
> drivers/iio/adc/Kconfig | 10 ++
> drivers/iio/adc/Makefile | 1 +
> drivers/iio/adc/mp2629_adc.c | 208 +++++++++++++++++++++++++++++++++++
> include/linux/mfd/mp2629.h | 9 ++
> 4 files changed, 228 insertions(+)
> create mode 100644 drivers/iio/adc/mp2629_adc.c
>
> diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
> index 82e33082958c..ef0c0cd31855 100644
> --- a/drivers/iio/adc/Kconfig
> +++ b/drivers/iio/adc/Kconfig
> @@ -680,6 +680,16 @@ config MESON_SARADC
> To compile this driver as a module, choose M here: the
> module will be called meson_saradc.
>
> +config MP2629_ADC
> + tristate "Monolithic MP2629 ADC driver"
> + depends on MFD_MP2629
> + help
> + Say yes to have support for battery charger IC MP2629 ADC device
> + accessed over I2C.
> +
> + This driver provides ADC conversion of system, input power supply
> + and battery voltage & current information.
> +
> config NAU7802
> tristate "Nuvoton NAU7802 ADC driver"
> depends on I2C
> diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile
> index 919228900df9..f14416c245a6 100644
> --- a/drivers/iio/adc/Makefile
> +++ b/drivers/iio/adc/Makefile
> @@ -64,6 +64,7 @@ obj-$(CONFIG_MCP3911) += mcp3911.o
> obj-$(CONFIG_MEDIATEK_MT6577_AUXADC) += mt6577_auxadc.o
> obj-$(CONFIG_MEN_Z188_ADC) += men_z188_adc.o
> obj-$(CONFIG_MESON_SARADC) += meson_saradc.o
> +obj-$(CONFIG_MP2629_ADC) += mp2629_adc.o
> obj-$(CONFIG_MXS_LRADC_ADC) += mxs-lradc-adc.o
> obj-$(CONFIG_NAU7802) += nau7802.o
> obj-$(CONFIG_NPCM_ADC) += npcm_adc.o
> diff --git a/drivers/iio/adc/mp2629_adc.c b/drivers/iio/adc/mp2629_adc.c
> new file mode 100644
> index 000000000000..e32d5bbe97df
> --- /dev/null
> +++ b/drivers/iio/adc/mp2629_adc.c
> @@ -0,0 +1,208 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * MP2629 Driver for ADC
> + *
> + * Copyright 2020 Monolithic Power Systems, Inc
> + *
> + * Author: Saravanan Sekar <sravanhome@gmail.com>
> + */
> +
> +#include <linux/iio/driver.h>
> +#include <linux/iio/iio.h>
> +#include <linux/iio/machine.h>
> +#include <linux/mfd/mp2629.h>
> +#include <linux/module.h>
> +#include <linux/mutex.h>
> +#include <linux/platform_device.h>
> +#include <linux/regmap.h>
> +
> +#define MP2629_REG_ADC_CTRL 0x03
> +#define MP2629_REG_BATT_VOLT 0x0e
> +#define MP2629_REG_SYSTEM_VOLT 0x0f
> +#define MP2629_REG_INPUT_VOLT 0x11
> +#define MP2629_REG_BATT_CURRENT 0x12
> +#define MP2629_REG_INPUT_CURRENT 0x13
> +
> +#define MP2629_ADC_START BIT(7)
> +#define MP2629_ADC_CONTINUOUS BIT(6)
> +
> +#define MP2629_MAP(_mp, _mpc) IIO_MAP(#_mp, "mp2629_charger", "mp2629-"_mpc)
> +
> +#define MP2629_ADC_CHAN(_ch, _type) { \
> + .type = _type, \
> + .indexed = 1, \
> + .datasheet_name = #_ch, \
> + .channel = MP2629_ ## _ch, \
> + .address = MP2629_REG_ ## _ch, \
> + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
> + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
> +}
> +
> +struct mp2629_adc {
> + struct regmap *regmap;
> + struct device *dev;
> +};
> +
> +static struct iio_chan_spec mp2629_channels[] = {
> + MP2629_ADC_CHAN(BATT_VOLT, IIO_VOLTAGE),
> + MP2629_ADC_CHAN(SYSTEM_VOLT, IIO_VOLTAGE),
> + MP2629_ADC_CHAN(INPUT_VOLT, IIO_VOLTAGE),
> + MP2629_ADC_CHAN(BATT_CURRENT, IIO_CURRENT),
> + MP2629_ADC_CHAN(INPUT_CURRENT, IIO_CURRENT)
> +};
> +
> +static struct iio_map mp2629_adc_maps[] = {
> + MP2629_MAP(BATT_VOLT, "batt-volt"),
> + MP2629_MAP(SYSTEM_VOLT, "system-volt"),
> + MP2629_MAP(INPUT_VOLT, "input-volt"),
> + MP2629_MAP(BATT_CURRENT, "batt-current"),
> + MP2629_MAP(INPUT_CURRENT, "input-current")
> +};
> +
> +static int mp2629_read_raw(struct iio_dev *indio_dev,
> + struct iio_chan_spec const *chan,
> + int *val, int *val2, long mask)
> +{
> + struct mp2629_adc *info = iio_priv(indio_dev);
> + unsigned int rval;
> + int ret;
> +
> + switch (mask) {
> + case IIO_CHAN_INFO_RAW:
> + ret = regmap_read(info->regmap, chan->address, &rval);
> + if (ret)
> + return ret;
> +
> + if (chan->address == MP2629_INPUT_VOLT)
> + rval &= GENMASK(6, 0);
> + *val = rval;
> + return IIO_VAL_INT;
> +
> + case IIO_CHAN_INFO_SCALE:
> + switch (chan->channel) {
> + case MP2629_BATT_VOLT:
> + case MP2629_SYSTEM_VOLT:
> + *val = 20;
> + return IIO_VAL_INT;
> +
> + case MP2629_INPUT_VOLT:
> + *val = 60;
> + return IIO_VAL_INT;
> +
> + case MP2629_BATT_CURRENT:
> + *val = 175;
> + *val2 = 10;
> + return IIO_VAL_FRACTIONAL;
> +
> + case MP2629_INPUT_CURRENT:
> + *val = 133;
> + *val2 = 10;
> + return IIO_VAL_FRACTIONAL;
> +
> + default:
> + return -EINVAL;
> + }
> +
> + default:
> + return -EINVAL;
> + }
> +}
> +
> +static const struct iio_info mp2629_adc_info = {
> + .read_raw = &mp2629_read_raw,
> +};
> +
> +static int mp2629_adc_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct mp2629_info *ddata = dev_get_drvdata(dev->parent);
> + struct mp2629_adc *info;
> + struct iio_dev *indio_dev;
> + int ret;
> +
> + indio_dev = devm_iio_device_alloc(dev, sizeof(*info));
> + if (!indio_dev)
> + return -ENOMEM;
> +
> + info = iio_priv(indio_dev);
> + info->regmap = ddata->regmap;
> + info->dev = dev;
> + platform_set_drvdata(pdev, indio_dev);
> +
> + ret = iio_map_array_register(indio_dev, mp2629_adc_maps);
> + if (ret) {
> + dev_err(dev, "IIO maps register fail: %d\n", ret);
> + return ret;
> + }
It may well not matter, but it is probably more logical to register
the map (and hence allow consumers) after turning the device on.
> +
> + indio_dev->name = "mp2629-adc";
> + indio_dev->dev.parent = dev;
> + indio_dev->channels = mp2629_channels;
> + indio_dev->num_channels = ARRAY_SIZE(mp2629_channels);
> + indio_dev->modes = INDIO_DIRECT_MODE;
> + indio_dev->info = &mp2629_adc_info;
> +
> + ret = regmap_update_bits(ddata->regmap, MP2629_REG_ADC_CTRL,
> + MP2629_ADC_START | MP2629_ADC_CONTINUOUS,
> + MP2629_ADC_START | MP2629_ADC_CONTINUOUS);
> + if (ret) {
> + dev_err(dev, "adc enable fail: %d\n", ret);
> + goto fail_unmap;
> + }
> +
> + ret = iio_device_register(indio_dev);
> + if (ret) {
> + dev_err(dev, "IIO device register fail: %d\n", ret);
> + goto fail_disable;
> + }
> +
> + return 0;
> +
> +fail_disable:
> + regmap_update_bits(ddata->regmap, MP2629_REG_ADC_CTRL,
> + MP2629_ADC_CONTINUOUS, 0);
> + regmap_update_bits(ddata->regmap, MP2629_REG_ADC_CTRL,
> + MP2629_ADC_START, 0);
> +
> +fail_unmap:
Nitpick but that's a missleading name. There is a big difference between
registering a map and mapping something. fail_map_unregister would be
better here.
> + iio_map_array_unregister(indio_dev);
> +
> + return ret;
> +}
> +
> +static int mp2629_adc_remove(struct platform_device *pdev)
> +{
> + struct iio_dev *indio_dev = platform_get_drvdata(pdev);
> + struct mp2629_adc *info = iio_priv(indio_dev);
> +
The order in here is wrong. It should be the reverse of what we
have in probe.
So start by removing the interfaces.
iio_device_unregister..
then disable the device
then remove the map.
However, there is a reasonable arguement that logically the
device should be on before your register the map.
> + iio_map_array_unregister(indio_dev);
> +
> + regmap_update_bits(info->regmap, MP2629_REG_ADC_CTRL,
> + MP2629_ADC_CONTINUOUS, 0);
> + regmap_update_bits(info->regmap, MP2629_REG_ADC_CTRL,
> + MP2629_ADC_START, 0);
> +
> + iio_device_unregister(indio_dev);
> +
> + return 0;
> +}
> +
> +static const struct of_device_id mp2629_adc_of_match[] = {
> + { .compatible = "mps,mp2629_adc"},
> + {}
> +};
> +MODULE_DEVICE_TABLE(of, mp2629_adc_of_match);
> +
> +static struct platform_driver mp2629_adc_driver = {
> + .driver = {
> + .name = "mp2629_adc",
> + .of_match_table = mp2629_adc_of_match,
> + },
> + .probe = mp2629_adc_probe,
> + .remove = mp2629_adc_remove,
> +};
> +module_platform_driver(mp2629_adc_driver);
> +
> +MODULE_AUTHOR("Saravanan Sekar <sravanhome@gmail.com>");
> +MODULE_DESCRIPTION("MP2629 ADC driver");
> +MODULE_LICENSE("GPL");
> diff --git a/include/linux/mfd/mp2629.h b/include/linux/mfd/mp2629.h
> index 06985e41fc6f..83ebfab41691 100644
> --- a/include/linux/mfd/mp2629.h
> +++ b/include/linux/mfd/mp2629.h
> @@ -16,4 +16,13 @@ struct mp2629_info {
> struct regmap *regmap;
> };
>
> +enum mp2629_adc_chan {
> + MP2629_BATT_VOLT,
> + MP2629_SYSTEM_VOLT,
> + MP2629_INPUT_VOLT,
> + MP2629_BATT_CURRENT,
> + MP2629_INPUT_CURRENT,
> + MP2629_ADC_CHAN_END
> +};
> +
> #endif
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v7 4/5] power: supply: Add support for mps mp2629 battery charger
2020-04-10 20:19 ` [PATCH v7 4/5] power: supply: Add support for mps mp2629 battery charger Saravanan Sekar
2020-04-11 10:15 ` Andy Shevchenko
@ 2020-04-13 20:40 ` Sebastian Reichel
2020-04-15 13:44 ` saravanan sekar
1 sibling, 1 reply; 11+ messages in thread
From: Sebastian Reichel @ 2020-04-13 20:40 UTC (permalink / raw)
To: Saravanan Sekar
Cc: lee.jones, andy.shevchenko, robh+dt, jic23, knaack.h, lars,
pmeerw, devicetree, linux-kernel, linux-iio, linux-pm
[-- Attachment #1: Type: text/plain, Size: 24144 bytes --]
Hi,
On Fri, Apr 10, 2020 at 10:19:47PM +0200, Saravanan Sekar wrote:
> The mp2629 provides switching-mode battery charge management for
> single-cell Li-ion or Li-polymer battery. Driver supports the
> access/control input source and battery charging parameters.
>
> Signed-off-by: Saravanan Sekar <sravanhome@gmail.com>
> ---
Generally looks good, but I do have some comments.
> drivers/power/supply/Kconfig | 10 +
> drivers/power/supply/Makefile | 1 +
> drivers/power/supply/mp2629_charger.c | 687 ++++++++++++++++++++++++++
> 3 files changed, 698 insertions(+)
> create mode 100644 drivers/power/supply/mp2629_charger.c
>
> diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
> index f3424fdce341..05b3f66946ad 100644
> --- a/drivers/power/supply/Kconfig
> +++ b/drivers/power/supply/Kconfig
> @@ -541,6 +541,16 @@ config CHARGER_MAX8998
> Say Y to enable support for the battery charger control sysfs and
> platform data of MAX8998/LP3974 PMICs.
>
> +config CHARGER_MP2629
> + tristate "Monolithic power system MP2629 Battery charger"
> + depends on MFD_MP2629
> + depends on MP2629_ADC
> + depends on IIO
> + help
> + Select this option to enable support for Monolithic power system
> + Battery charger. This driver provies Battery charger power management
> + functions on the systems.
> +
> 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 6c7da920ea83..41cb64f09e49 100644
> --- a/drivers/power/supply/Makefile
> +++ b/drivers/power/supply/Makefile
> @@ -75,6 +75,7 @@ obj-$(CONFIG_CHARGER_MAX77650) += max77650-charger.o
> obj-$(CONFIG_CHARGER_MAX77693) += max77693_charger.o
> obj-$(CONFIG_CHARGER_MAX8997) += max8997_charger.o
> obj-$(CONFIG_CHARGER_MAX8998) += max8998_charger.o
> +obj-$(CONFIG_CHARGER_MP2629) += mp2629_charger.o
> obj-$(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/mp2629_charger.c b/drivers/power/supply/mp2629_charger.c
> new file mode 100644
> index 000000000000..279edfe383ee
> --- /dev/null
> +++ b/drivers/power/supply/mp2629_charger.c
> @@ -0,0 +1,687 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * MP2629 battery charger driver
> + *
> + * Copyright 2020 Monolithic Power Systems, Inc
> + *
> + * Author: Saravanan Sekar <sravanhome@gmail.com>
> + */
> +
> +#include <linux/bits.h>
> +#include <linux/iio/consumer.h>
> +#include <linux/iio/types.h>
> +#include <linux/interrupt.h>
> +#include <linux/mfd/mp2629.h>
> +#include <linux/module.h>
> +#include <linux/mod_devicetable.h>
> +#include <linux/platform_device.h>
> +#include <linux/power_supply.h>
> +#include <linux/regmap.h>
> +#include <linux/workqueue.h>
> +
> +#define MP2629_REG_INPUT_ILIM 0x00
> +#define MP2629_REG_INPUT_VLIM 0x01
> +#define MP2629_REG_CHARGE_CTRL 0x04
> +#define MP2629_REG_CHARGE_ILIM 0x05
> +#define MP2629_REG_PRECHARGE 0x06
> +#define MP2629_REG_TERM_CURRENT 0x06
> +#define MP2629_REG_CHARGE_VLIM 0x07
> +#define MP2629_REG_TIMER_CTRL 0x08
> +#define MP2629_REG_IMPEDANCE_COMP 0x09
> +#define MP2629_REG_INTERRUPT 0x0b
> +#define MP2629_REG_STATUS 0x0c
> +#define MP2629_REG_FAULT 0x0d
> +
> +#define MP2629_MASK_INPUT_TYPE GENMASK(7, 5)
> +#define MP2629_MASK_CHARGE_TYPE GENMASK(4, 3)
> +#define MP2629_MASK_CHARGE_CTRL GENMASK(5, 4)
> +#define MP2629_MASK_WDOG_CTRL GENMASK(5, 4)
> +#define MP2629_MASK_IMPEDANCE GENMASK(7, 4)
> +
> +#define MP2629_INPUTSOURCE_CHANGE GENMASK(7, 5)
> +#define MP2629_CHARGING_CHANGE GENMASK(4, 3)
> +#define MP2629_FAULT_BATTERY BIT(3)
> +#define MP2629_FAULT_THERMAL BIT(4)
> +#define MP2629_FAULT_INPUT BIT(5)
> +#define MP2629_FAULT_OTG BIT(6)
> +
> +#define MP2629_MAX_BATT_CAPACITY 100
> +
> +#define MP2629_PROPS(_idx, _min, _max, _step) \
> + [_idx] = { \
> + .min = _min, \
> + .max = _max, \
> + .step = _step, \
> +}
> +
> +enum mp2629_source_type {
> + MP2629_SOURCE_TYPE_NO_INPUT,
> + MP2629_SOURCE_TYPE_NON_STD,
> + MP2629_SOURCE_TYPE_SDP,
> + MP2629_SOURCE_TYPE_CDP,
> + MP2629_SOURCE_TYPE_DCP,
> + MP2629_SOURCE_TYPE_OTG = 7,
> +};
> +
> +enum mp2629_field {
> + INPUT_ILIM,
> + INPUT_VLIM,
> + CHARGE_ILIM,
> + CHARGE_VLIM,
> + PRECHARGE,
> + TERM_CURRENT,
> + MP2629_MAX_FIELD
> +};
> +
> +struct mp2629_charger {
> + struct device *dev;
> + struct work_struct charger_work;
> + int status;
> + int fault;
> +
> + struct regmap *regmap;
> + struct regmap_field *regmap_fields[MP2629_MAX_FIELD];
> + struct mutex lock;
> + struct power_supply *usb;
> + struct power_supply *battery;
> + struct iio_channel *iiochan[MP2629_ADC_CHAN_END];
> +};
> +
> +struct mp2629_prop {
> + int reg;
> + int mask;
> + int min;
> + int max;
> + int step;
> + int shift;
> +};
> +
> +static enum power_supply_usb_type mp2629_usb_types[] = {
> + POWER_SUPPLY_USB_TYPE_SDP,
> + POWER_SUPPLY_USB_TYPE_DCP,
> + POWER_SUPPLY_USB_TYPE_CDP,
> + POWER_SUPPLY_USB_TYPE_PD_DRP,
> + POWER_SUPPLY_USB_TYPE_UNKNOWN
> +};
> +
> +static enum power_supply_property mp2629_charger_usb_props[] = {
> + POWER_SUPPLY_PROP_ONLINE,
> + POWER_SUPPLY_PROP_USB_TYPE,
> + POWER_SUPPLY_PROP_VOLTAGE_NOW,
> + POWER_SUPPLY_PROP_CURRENT_NOW,
> + POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
> + POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
> +};
> +
> +static enum power_supply_property mp2629_charger_bat_props[] = {
> + POWER_SUPPLY_PROP_STATUS,
> + POWER_SUPPLY_PROP_HEALTH,
> + POWER_SUPPLY_PROP_CHARGE_TYPE,
> + POWER_SUPPLY_PROP_VOLTAGE_NOW,
> + POWER_SUPPLY_PROP_CURRENT_NOW,
> + POWER_SUPPLY_PROP_CAPACITY,
> + POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
> + POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
> + POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
> + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
> + POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
> + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
> +};
> +
> +static struct mp2629_prop props[] = {
> + MP2629_PROPS(INPUT_ILIM, 100000, 3250000, 50000),
> + MP2629_PROPS(INPUT_VLIM, 3800000, 5300000, 100000),
> + MP2629_PROPS(CHARGE_ILIM, 320000, 4520000, 40000),
> + MP2629_PROPS(CHARGE_VLIM, 3400000, 4670000, 10000),
> + MP2629_PROPS(PRECHARGE, 120000, 720000, 40000),
> + MP2629_PROPS(TERM_CURRENT, 80000, 680000, 40000),
> +};
> +
> +static const struct reg_field mp2629_reg_fields[] = {
> + [INPUT_ILIM] = REG_FIELD(MP2629_REG_INPUT_ILIM, 0, 5),
> + [INPUT_VLIM] = REG_FIELD(MP2629_REG_INPUT_VLIM, 0, 3),
> + [CHARGE_ILIM] = REG_FIELD(MP2629_REG_CHARGE_ILIM, 0, 6),
> + [CHARGE_VLIM] = REG_FIELD(MP2629_REG_CHARGE_VLIM, 1, 7),
> + [PRECHARGE] = REG_FIELD(MP2629_REG_PRECHARGE, 4, 7),
> + [TERM_CURRENT] = REG_FIELD(MP2629_REG_TERM_CURRENT, 0, 3),
> +};
> +
> +static char *adc_chan_name[] = {
> + "mp2629-batt-volt",
> + "mp2629-system-volt",
> + "mp2629-input-volt",
> + "mp2629-batt-current",
> + "mp2629-input-current",
> +};
> +
> +static int mp2629_read_adc(struct mp2629_charger *charger,
> + enum mp2629_adc_chan ch,
> + union power_supply_propval *val)
> +{
> + int ret;
> + int chval;
> +
> + ret = iio_read_channel_processed(charger->iiochan[ch], &chval);
> + if (ret)
> + return ret;
> +
> + val->intval = chval * 1000;
> +
> + return 0;
> +}
> +
> +static int mp2629_get_prop(struct mp2629_charger *charger,
> + enum mp2629_field fld,
> + union power_supply_propval *val)
> +{
> + int ret;
> + unsigned int rval;
> +
> + ret = regmap_field_read(charger->regmap_fields[fld], &rval);
> + if (ret)
> + return ret;
> +
> + val->intval = rval * props[fld].step + props[fld].min;
> +
> + return 0;
> +}
> +
> +static int mp2629_set_prop(struct mp2629_charger *charger,
> + enum mp2629_field fld,
> + const union power_supply_propval *val)
> +{
> + unsigned int rval;
> +
> + if (val->intval < props[fld].min || val->intval > props[fld].max)
> + return -EINVAL;
> +
> + rval = (val->intval - props[fld].min) / props[fld].step;
> + return regmap_field_write(charger->regmap_fields[fld], rval);
> +}
> +
> +static int mp2629_get_battery_capacity(struct mp2629_charger *charger,
> + union power_supply_propval *val)
> +{
> + union power_supply_propval vnow, vlim;
> + int ret;
> +
> + ret = mp2629_read_adc(charger, MP2629_BATT_VOLT, &vnow);
> + if (ret)
> + return ret;
> +
> + ret = mp2629_get_prop(charger, CHARGE_VLIM, &vlim);
> + if (ret)
> + return ret;
> +
> + val->intval = (vnow.intval * 100) / vlim.intval;
> + val->intval = min(val->intval, MP2629_MAX_BATT_CAPACITY);
> +
> + return 0;
> +}
This looks like a very rough estimate. Voltage does not drop
linearly for Li-Ion batteries. Is there a good reason for exposing
this and not letting userspace taking care of this estimation?
> +static int mp2629_charger_battery_get_prop(struct power_supply *psy,
> + enum power_supply_property psp,
> + union power_supply_propval *val)
> +{
> + struct mp2629_charger *charger = dev_get_drvdata(psy->dev.parent);
> + unsigned int rval;
> + int ret = 0;
> +
> + switch (psp) {
> + case POWER_SUPPLY_PROP_VOLTAGE_NOW:
> + ret = mp2629_read_adc(charger, MP2629_BATT_VOLT, val);
> + break;
> +
> + case POWER_SUPPLY_PROP_CURRENT_NOW:
> + ret = mp2629_read_adc(charger, MP2629_BATT_CURRENT, val);
> + break;
> +
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
> + val->intval = 4520000;
> + break;
> +
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
> + val->intval = 4670000;
> + break;
> +
> + case POWER_SUPPLY_PROP_CAPACITY:
> + ret = mp2629_get_battery_capacity(charger, val);
> + break;
> +
> + case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
> + ret = mp2629_get_prop(charger, TERM_CURRENT, val);
> + break;
> +
> + case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
> + ret = mp2629_get_prop(charger, PRECHARGE, val);
> + break;
> +
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
> + ret = mp2629_get_prop(charger, CHARGE_VLIM, val);
> + break;
> +
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
> + ret = mp2629_get_prop(charger, CHARGE_ILIM, val);
> + break;
> +
> + case POWER_SUPPLY_PROP_HEALTH:
> + if (!charger->fault)
> + val->intval = POWER_SUPPLY_HEALTH_GOOD;
> + if (MP2629_FAULT_BATTERY & charger->fault)
> + val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
> + else if (MP2629_FAULT_THERMAL & charger->fault)
> + val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
> + else if (MP2629_FAULT_INPUT & charger->fault)
> + val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
> + break;
> +
> + case POWER_SUPPLY_PROP_STATUS:
> + ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
> + if (ret)
> + break;
> +
> + rval = (rval & MP2629_MASK_CHARGE_TYPE) >> 3;
> + switch (rval) {
> + case 0x00:
> + val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
> + break;
This should probably set POWER_SUPPLY_STATUS_DISCHARGING vs
POWER_SUPPLY_STATUS_NOT_CHARGING based on the battery current.
NOT_CHARGING means, that the battery is idle.
> + case 0x01:
> + case 0x10:
> + val->intval = POWER_SUPPLY_STATUS_CHARGING;
> + break;
> + case 0x11:
> + val->intval = POWER_SUPPLY_STATUS_FULL;
> + }
> + break;
> +
> + case POWER_SUPPLY_PROP_CHARGE_TYPE:
> + ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
> + if (ret)
> + break;
> +
> + rval = (rval & MP2629_MASK_CHARGE_TYPE) >> 3;
> + switch (rval) {
> + case 0x00:
> + val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
> + break;
> + case 0x01:
> + val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
> + break;
> + case 0x10:
> + val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
> + break;
> + default:
> + val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
> + }
> + break;
> +
> + default:
> + return -EINVAL;
> + }
> +
> + return ret;
> +}
> +
> +static int mp2629_charger_battery_set_prop(struct power_supply *psy,
> + enum power_supply_property psp,
> + const union power_supply_propval *val)
> +{
> + struct mp2629_charger *charger = dev_get_drvdata(psy->dev.parent);
> +
> + switch (psp) {
> + case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
> + return mp2629_set_prop(charger, TERM_CURRENT, val);
> +
> + case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
> + return mp2629_set_prop(charger, PRECHARGE, val);
> +
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
> + return mp2629_set_prop(charger, CHARGE_VLIM, val);
> +
> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
> + return mp2629_set_prop(charger, CHARGE_ILIM, val);
> +
> + default:
> + return -EINVAL;
> + }
> +}
> +
> +static int mp2629_charger_usb_get_prop(struct power_supply *psy,
> + enum power_supply_property psp,
> + union power_supply_propval *val)
> +{
> + struct mp2629_charger *charger = dev_get_drvdata(psy->dev.parent);
> + unsigned int rval;
> + int ret;
> +
> + switch (psp) {
> + case POWER_SUPPLY_PROP_ONLINE:
> + ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
> + if (ret)
> + break;
> +
> + val->intval = !!(rval & MP2629_MASK_INPUT_TYPE);
> + break;
> +
> + case POWER_SUPPLY_PROP_USB_TYPE:
> + ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
> + if (ret)
> + break;
> +
> + rval = (rval & MP2629_MASK_INPUT_TYPE) >> 5;
> + switch (rval) {
> + case MP2629_SOURCE_TYPE_SDP:
> + val->intval = POWER_SUPPLY_USB_TYPE_SDP;
> + break;
> + case MP2629_SOURCE_TYPE_CDP:
> + val->intval = POWER_SUPPLY_USB_TYPE_CDP;
> + break;
> + case MP2629_SOURCE_TYPE_DCP:
> + val->intval = POWER_SUPPLY_USB_TYPE_DCP;
> + break;
> + case MP2629_SOURCE_TYPE_OTG:
> + val->intval = POWER_SUPPLY_USB_TYPE_PD_DRP;
> + break;
> + default:
> + val->intval = POWER_SUPPLY_USB_TYPE_UNKNOWN;
> + break;
> + }
> + break;
> +
> + case POWER_SUPPLY_PROP_VOLTAGE_NOW:
> + ret = mp2629_read_adc(charger, MP2629_INPUT_VOLT, val);
> + break;
> +
> + case POWER_SUPPLY_PROP_CURRENT_NOW:
> + ret = mp2629_read_adc(charger, MP2629_INPUT_CURRENT, val);
> + break;
> +
> + case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
> + ret = mp2629_get_prop(charger, INPUT_VLIM, val);
> + break;
> +
> + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
> + ret = mp2629_get_prop(charger, INPUT_ILIM, val);
> + break;
> +
> + default:
> + return -EINVAL;
> + }
> +
> + return ret;
> +}
> +
> +static int mp2629_charger_usb_set_prop(struct power_supply *psy,
> + enum power_supply_property psp,
> + const union power_supply_propval *val)
> +{
> + struct mp2629_charger *charger = dev_get_drvdata(psy->dev.parent);
> +
> + switch (psp) {
> + case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
> + return mp2629_set_prop(charger, INPUT_VLIM, val);
> +
> + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
> + return mp2629_set_prop(charger, INPUT_ILIM, val);
> +
> + default:
> + return -EINVAL;
> + }
> +}
> +
> +static int mp2629_charger_battery_prop_writeable(struct power_supply *psy,
> + enum power_supply_property psp)
> +{
> + return (psp == POWER_SUPPLY_PROP_PRECHARGE_CURRENT) ||
> + (psp == POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT) ||
> + (psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT) ||
> + (psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE);
> +}
> +
> +static int mp2629_charger_usb_prop_writeable(struct power_supply *psy,
> + enum power_supply_property psp)
> +{
> + return (psp == POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT) ||
> + (psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT);
> +}
> +
> +static void mp2629_charger_work(struct work_struct *work)
> +{
> + struct mp2629_charger *charger;
> + unsigned int rval;
> + int ret;
> +
> + charger = container_of(work, struct mp2629_charger, charger_work);
> +
> + mutex_lock(&charger->lock);
> +
> + ret = regmap_read(charger->regmap, MP2629_REG_FAULT, &rval);
> + if (ret)
> + goto unlock;
> +
> + if (rval) {
> + charger->fault = rval;
> + if (MP2629_FAULT_BATTERY & rval)
> + dev_err(charger->dev, "Battery fault OVP");
> + else if (MP2629_FAULT_THERMAL & rval)
> + dev_err(charger->dev, "Thermal shutdown fault");
> + else if (MP2629_FAULT_INPUT & rval)
> + dev_err(charger->dev, "no input or input OVP");
> + else if (MP2629_FAULT_OTG & rval)
> + dev_err(charger->dev, "VIN overloaded");
> +
> + goto unlock;
> + }
> +
> + ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
> + if (ret)
> + goto unlock;
> +
> + if (rval & MP2629_INPUTSOURCE_CHANGE)
> + power_supply_changed(charger->usb);
> + else if (rval & MP2629_CHARGING_CHANGE)
> + power_supply_changed(charger->battery);
> +
> +unlock:
> + mutex_unlock(&charger->lock);
> +}
> +
> +static irqreturn_t mp2629_irq_handler(int irq, void *dev_id)
> +{
> + struct mp2629_charger *charger = dev_id;
> +
> + schedule_work(&charger->charger_work);
> + return IRQ_HANDLED;
> +}
The worker is only called here, so it is an open coded
request_threaded_irq() without IRQF_ONESHOT. Please use
the standard request_threaded_irq() and remove the worker.
It simplifies the code and removes a race condition during
driver removal: If any interrupt arrives between canceling
the charger work and disabling the IRQ the driver might execute
the worker with free'd resources.
> +static const struct power_supply_desc mp2629_usb_desc = {
> + .name = "mp2629_usb",
> + .type = POWER_SUPPLY_TYPE_USB,
> + .usb_types = mp2629_usb_types,
> + .num_usb_types = ARRAY_SIZE(mp2629_usb_types),
> + .properties = mp2629_charger_usb_props,
> + .num_properties = ARRAY_SIZE(mp2629_charger_usb_props),
> + .get_property = mp2629_charger_usb_get_prop,
> + .set_property = mp2629_charger_usb_set_prop,
> + .property_is_writeable = mp2629_charger_usb_prop_writeable,
> +};
> +
> +static const struct power_supply_desc mp2629_battery_desc = {
> + .name = "mp2629_battery",
> + .type = POWER_SUPPLY_TYPE_BATTERY,
> + .properties = mp2629_charger_bat_props,
> + .num_properties = ARRAY_SIZE(mp2629_charger_bat_props),
> + .get_property = mp2629_charger_battery_get_prop,
> + .set_property = mp2629_charger_battery_set_prop,
> + .property_is_writeable = mp2629_charger_battery_prop_writeable,
> +};
> +
> +static ssize_t batt_impedance_compensation_show(struct device *dev,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + struct mp2629_charger *charger = dev_get_drvdata(dev->parent);
> + unsigned int rval;
> + int ret;
> +
> + ret = regmap_read(charger->regmap, MP2629_REG_IMPEDANCE_COMP, &rval);
> + if (ret)
> + return ret;
> +
> + rval = (rval >> 4) * 10;
> + return sprintf(buf, "%d mohm\n", rval);
> +}
> +
> +static ssize_t batt_impedance_compensation_store(struct device *dev,
> + struct device_attribute *attr,
> + const char *buf,
> + size_t count)
> +{
> + struct mp2629_charger *charger = dev_get_drvdata(dev->parent);
> + unsigned int val;
> + int ret;
> +
> + ret = kstrtouint(buf, 10, &val);
> + if (ret)
> + return ret;
> +
> + if (val > 140)
> + return -ERANGE;
> +
> + /* multiples of 10 mohm so round off */
> + val = val / 10;
> + ret = regmap_update_bits(charger->regmap, MP2629_REG_IMPEDANCE_COMP,
> + MP2629_MASK_IMPEDANCE, val << 4);
> + if (ret)
> + return ret;
> +
> + return count;
> +}
> +
> +static DEVICE_ATTR_RW(batt_impedance_compensation);
Needs to be documented in device specific properties:
Documentation/ABI/testing/sysfs-class-power
> +static struct attribute *mp2629_charger_sysfs_attrs[] = {
> + &dev_attr_batt_impedance_compensation.attr,
> + NULL
> +};
> +ATTRIBUTE_GROUPS(mp2629_charger_sysfs);
> +
> +static int mp2629_charger_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct mp2629_info *ddata = dev_get_drvdata(dev->parent);
> + struct mp2629_charger *charger;
> + struct power_supply_config psy_cfg = {};
> + int ret, i, irq;
> +
> + charger = devm_kzalloc(dev, sizeof(*charger), GFP_KERNEL);
> + if (!charger)
> + return -ENOMEM;
> +
> + charger->regmap = ddata->regmap;
> + charger->dev = dev;
> + platform_set_drvdata(pdev, charger);
> +
> + for (i = 0; i < MP2629_MAX_FIELD; i++) {
> + charger->regmap_fields[i] = devm_regmap_field_alloc(dev,
> + charger->regmap, mp2629_reg_fields[i]);
> + if (IS_ERR(charger->regmap_fields[i])) {
> + dev_err(dev, "regmap field alloc fail %d\n", i);
> + return PTR_ERR(charger->regmap_fields[i]);
> + }
> + }
> +
> + for (i = 0; i < MP2629_ADC_CHAN_END; i++) {
> + charger->iiochan[i] = iio_channel_get(dev, adc_chan_name[i]);
Why not devm_iio_channel_get() for further simplifying the code?
> + if (IS_ERR(charger->iiochan[i])) {
> + ret = PTR_ERR(charger->iiochan[i]);
> + goto iio_fail;
> + }
> + }
> +
> + charger->usb = devm_power_supply_register(dev, &mp2629_usb_desc, NULL);
> + if (IS_ERR(charger->usb)) {
> + ret = PTR_ERR(charger->usb);
> + goto iio_fail;
> + }
devm_ based resource allocation should not follow non-devm
allocation without a very good reason. Usually we release resources
in reverse allocation order, like unrolling a stack. Having a
non-devm requested resource request before a devm resource request
breaks this pattern.
> + psy_cfg.drv_data = charger;
> + psy_cfg.attr_grp = mp2629_charger_sysfs_groups;
> + charger->battery = devm_power_supply_register(dev,
> + &mp2629_battery_desc, &psy_cfg);
> + if (IS_ERR(charger->battery)) {
> + ret = PTR_ERR(charger->battery);
> + goto iio_fail;
> + }
> +
> + ret = regmap_update_bits(charger->regmap, MP2629_REG_CHARGE_CTRL,
> + MP2629_MASK_CHARGE_CTRL, BIT(4));
> + if (ret) {
> + dev_err(dev, "enable charge fail: %d\n", ret);
> + goto iio_fail;
> + }
> +
> + regmap_update_bits(charger->regmap, MP2629_REG_TIMER_CTRL,
> + MP2629_MASK_WDOG_CTRL, 0);
> +
> + INIT_WORK(&charger->charger_work, mp2629_charger_work);
> + mutex_init(&charger->lock);
> +
> + irq = platform_get_irq(to_platform_device(pdev->dev.parent), 0);
> + if (irq) {
> + ret = devm_request_irq(dev, irq, mp2629_irq_handler,
> + IRQF_TRIGGER_RISING, "mp2629-charger",
> + charger);
> + if (ret) {
> + dev_err(dev, "failed to request gpio IRQ\n");
> + goto iio_fail;
> + }
> + }
> +
> + regmap_update_bits(charger->regmap, MP2629_REG_INTERRUPT,
> + GENMASK(6, 5), BIT(6) | BIT(5));
> +
> + return 0;
> +
> +iio_fail:
> + while (i--)
> + iio_channel_release(charger->iiochan[i]);
> +
> + dev_err(dev, "driver register fail: %d\n", ret);
> + return ret;
> +}
> +
> +static int mp2629_charger_remove(struct platform_device *pdev)
> +{
> + struct mp2629_charger *charger = platform_get_drvdata(pdev);
> + int i;
> +
> + cancel_work_sync(&charger->charger_work);
> +
> + for (i = 0; i < MP2629_ADC_CHAN_END; i++)
> + iio_channel_release(charger->iiochan[i]);
> +
> + regmap_update_bits(charger->regmap, MP2629_REG_CHARGE_CTRL,
> + MP2629_MASK_CHARGE_CTRL, 0);
> + return 0;
> +}
> +
> +static const struct of_device_id mp2629_charger_of_match[] = {
> + { .compatible = "mps,mp2629_charger"},
> + {}
> +};
> +MODULE_DEVICE_TABLE(of, mp2629_charger_of_match);
> +
> +static struct platform_driver mp2629_charger_driver = {
> + .driver = {
> + .name = "mp2629_charger",
> + .of_match_table = mp2629_charger_of_match,
> + },
> + .probe = mp2629_charger_probe,
> + .remove = mp2629_charger_remove,
> +};
> +module_platform_driver(mp2629_charger_driver);
> +
> +MODULE_AUTHOR("Saravanan Sekar <sravanhome@gmail.com>");
> +MODULE_DESCRIPTION("MP2629 Charger driver");
> +MODULE_LICENSE("GPL");
-- Sebastian
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v7 4/5] power: supply: Add support for mps mp2629 battery charger
2020-04-13 20:40 ` Sebastian Reichel
@ 2020-04-15 13:44 ` saravanan sekar
0 siblings, 0 replies; 11+ messages in thread
From: saravanan sekar @ 2020-04-15 13:44 UTC (permalink / raw)
To: Sebastian Reichel
Cc: lee.jones, andy.shevchenko, robh+dt, jic23, knaack.h, lars,
pmeerw, devicetree, linux-kernel, linux-iio, linux-pm
Hi Sebastian,
On 13/04/20 10:40 pm, Sebastian Reichel wrote:
> Hi,
>
> On Fri, Apr 10, 2020 at 10:19:47PM +0200, Saravanan Sekar wrote:
>> The mp2629 provides switching-mode battery charge management for
>> single-cell Li-ion or Li-polymer battery. Driver supports the
>> access/control input source and battery charging parameters.
>>
>> Signed-off-by: Saravanan Sekar <sravanhome@gmail.com>
>> ---
> Generally looks good, but I do have some comments.
>
>> drivers/power/supply/Kconfig | 10 +
>> drivers/power/supply/Makefile | 1 +
>> drivers/power/supply/mp2629_charger.c | 687 ++++++++++++++++++++++++++
>> 3 files changed, 698 insertions(+)
>> create mode 100644 drivers/power/supply/mp2629_charger.c
>>
>> diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
>> index f3424fdce341..05b3f66946ad 100644
>> --- a/drivers/power/supply/Kconfig
>> +++ b/drivers/power/supply/Kconfig
>> @@ -541,6 +541,16 @@ config CHARGER_MAX8998
>> Say Y to enable support for the battery charger control sysfs and
>> platform data of MAX8998/LP3974 PMICs.
>>
>> +config CHARGER_MP2629
>> + tristate "Monolithic power system MP2629 Battery charger"
>> + depends on MFD_MP2629
>> + depends on MP2629_ADC
>> + depends on IIO
>> + help
>> + Select this option to enable support for Monolithic power system
>> + Battery charger. This driver provies Battery charger power management
>> + functions on the systems.
>> +
>> 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 6c7da920ea83..41cb64f09e49 100644
>> --- a/drivers/power/supply/Makefile
>> +++ b/drivers/power/supply/Makefile
>> @@ -75,6 +75,7 @@ obj-$(CONFIG_CHARGER_MAX77650) += max77650-charger.o
>> obj-$(CONFIG_CHARGER_MAX77693) += max77693_charger.o
>> obj-$(CONFIG_CHARGER_MAX8997) += max8997_charger.o
>> obj-$(CONFIG_CHARGER_MAX8998) += max8998_charger.o
>> +obj-$(CONFIG_CHARGER_MP2629) += mp2629_charger.o
>> obj-$(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/mp2629_charger.c b/drivers/power/supply/mp2629_charger.c
>> new file mode 100644
>> index 000000000000..279edfe383ee
>> --- /dev/null
>> +++ b/drivers/power/supply/mp2629_charger.c
>> @@ -0,0 +1,687 @@
>> +// SPDX-License-Identifier: GPL-2.0-or-later
>> +/*
>> + * MP2629 battery charger driver
>> + *
>> + * Copyright 2020 Monolithic Power Systems, Inc
>> + *
>> + * Author: Saravanan Sekar <sravanhome@gmail.com>
>> + */
>> +
>> +#include <linux/bits.h>
>> +#include <linux/iio/consumer.h>
>> +#include <linux/iio/types.h>
>> +#include <linux/interrupt.h>
>> +#include <linux/mfd/mp2629.h>
>> +#include <linux/module.h>
>> +#include <linux/mod_devicetable.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/power_supply.h>
>> +#include <linux/regmap.h>
>> +#include <linux/workqueue.h>
>> +
>> +#define MP2629_REG_INPUT_ILIM 0x00
>> +#define MP2629_REG_INPUT_VLIM 0x01
>> +#define MP2629_REG_CHARGE_CTRL 0x04
>> +#define MP2629_REG_CHARGE_ILIM 0x05
>> +#define MP2629_REG_PRECHARGE 0x06
>> +#define MP2629_REG_TERM_CURRENT 0x06
>> +#define MP2629_REG_CHARGE_VLIM 0x07
>> +#define MP2629_REG_TIMER_CTRL 0x08
>> +#define MP2629_REG_IMPEDANCE_COMP 0x09
>> +#define MP2629_REG_INTERRUPT 0x0b
>> +#define MP2629_REG_STATUS 0x0c
>> +#define MP2629_REG_FAULT 0x0d
>> +
>> +#define MP2629_MASK_INPUT_TYPE GENMASK(7, 5)
>> +#define MP2629_MASK_CHARGE_TYPE GENMASK(4, 3)
>> +#define MP2629_MASK_CHARGE_CTRL GENMASK(5, 4)
>> +#define MP2629_MASK_WDOG_CTRL GENMASK(5, 4)
>> +#define MP2629_MASK_IMPEDANCE GENMASK(7, 4)
>> +
>> +#define MP2629_INPUTSOURCE_CHANGE GENMASK(7, 5)
>> +#define MP2629_CHARGING_CHANGE GENMASK(4, 3)
>> +#define MP2629_FAULT_BATTERY BIT(3)
>> +#define MP2629_FAULT_THERMAL BIT(4)
>> +#define MP2629_FAULT_INPUT BIT(5)
>> +#define MP2629_FAULT_OTG BIT(6)
>> +
>> +#define MP2629_MAX_BATT_CAPACITY 100
>> +
>> +#define MP2629_PROPS(_idx, _min, _max, _step) \
>> + [_idx] = { \
>> + .min = _min, \
>> + .max = _max, \
>> + .step = _step, \
>> +}
>> +
>> +enum mp2629_source_type {
>> + MP2629_SOURCE_TYPE_NO_INPUT,
>> + MP2629_SOURCE_TYPE_NON_STD,
>> + MP2629_SOURCE_TYPE_SDP,
>> + MP2629_SOURCE_TYPE_CDP,
>> + MP2629_SOURCE_TYPE_DCP,
>> + MP2629_SOURCE_TYPE_OTG = 7,
>> +};
>> +
>> +enum mp2629_field {
>> + INPUT_ILIM,
>> + INPUT_VLIM,
>> + CHARGE_ILIM,
>> + CHARGE_VLIM,
>> + PRECHARGE,
>> + TERM_CURRENT,
>> + MP2629_MAX_FIELD
>> +};
>> +
>> +struct mp2629_charger {
>> + struct device *dev;
>> + struct work_struct charger_work;
>> + int status;
>> + int fault;
>> +
>> + struct regmap *regmap;
>> + struct regmap_field *regmap_fields[MP2629_MAX_FIELD];
>> + struct mutex lock;
>> + struct power_supply *usb;
>> + struct power_supply *battery;
>> + struct iio_channel *iiochan[MP2629_ADC_CHAN_END];
>> +};
>> +
>> +struct mp2629_prop {
>> + int reg;
>> + int mask;
>> + int min;
>> + int max;
>> + int step;
>> + int shift;
>> +};
>> +
>> +static enum power_supply_usb_type mp2629_usb_types[] = {
>> + POWER_SUPPLY_USB_TYPE_SDP,
>> + POWER_SUPPLY_USB_TYPE_DCP,
>> + POWER_SUPPLY_USB_TYPE_CDP,
>> + POWER_SUPPLY_USB_TYPE_PD_DRP,
>> + POWER_SUPPLY_USB_TYPE_UNKNOWN
>> +};
>> +
>> +static enum power_supply_property mp2629_charger_usb_props[] = {
>> + POWER_SUPPLY_PROP_ONLINE,
>> + POWER_SUPPLY_PROP_USB_TYPE,
>> + POWER_SUPPLY_PROP_VOLTAGE_NOW,
>> + POWER_SUPPLY_PROP_CURRENT_NOW,
>> + POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
>> + POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
>> +};
>> +
>> +static enum power_supply_property mp2629_charger_bat_props[] = {
>> + POWER_SUPPLY_PROP_STATUS,
>> + POWER_SUPPLY_PROP_HEALTH,
>> + POWER_SUPPLY_PROP_CHARGE_TYPE,
>> + POWER_SUPPLY_PROP_VOLTAGE_NOW,
>> + POWER_SUPPLY_PROP_CURRENT_NOW,
>> + POWER_SUPPLY_PROP_CAPACITY,
>> + POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
>> + POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
>> + POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
>> + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
>> + POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
>> + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
>> +};
>> +
>> +static struct mp2629_prop props[] = {
>> + MP2629_PROPS(INPUT_ILIM, 100000, 3250000, 50000),
>> + MP2629_PROPS(INPUT_VLIM, 3800000, 5300000, 100000),
>> + MP2629_PROPS(CHARGE_ILIM, 320000, 4520000, 40000),
>> + MP2629_PROPS(CHARGE_VLIM, 3400000, 4670000, 10000),
>> + MP2629_PROPS(PRECHARGE, 120000, 720000, 40000),
>> + MP2629_PROPS(TERM_CURRENT, 80000, 680000, 40000),
>> +};
>> +
>> +static const struct reg_field mp2629_reg_fields[] = {
>> + [INPUT_ILIM] = REG_FIELD(MP2629_REG_INPUT_ILIM, 0, 5),
>> + [INPUT_VLIM] = REG_FIELD(MP2629_REG_INPUT_VLIM, 0, 3),
>> + [CHARGE_ILIM] = REG_FIELD(MP2629_REG_CHARGE_ILIM, 0, 6),
>> + [CHARGE_VLIM] = REG_FIELD(MP2629_REG_CHARGE_VLIM, 1, 7),
>> + [PRECHARGE] = REG_FIELD(MP2629_REG_PRECHARGE, 4, 7),
>> + [TERM_CURRENT] = REG_FIELD(MP2629_REG_TERM_CURRENT, 0, 3),
>> +};
>> +
>> +static char *adc_chan_name[] = {
>> + "mp2629-batt-volt",
>> + "mp2629-system-volt",
>> + "mp2629-input-volt",
>> + "mp2629-batt-current",
>> + "mp2629-input-current",
>> +};
>> +
>> +static int mp2629_read_adc(struct mp2629_charger *charger,
>> + enum mp2629_adc_chan ch,
>> + union power_supply_propval *val)
>> +{
>> + int ret;
>> + int chval;
>> +
>> + ret = iio_read_channel_processed(charger->iiochan[ch], &chval);
>> + if (ret)
>> + return ret;
>> +
>> + val->intval = chval * 1000;
>> +
>> + return 0;
>> +}
>> +
>> +static int mp2629_get_prop(struct mp2629_charger *charger,
>> + enum mp2629_field fld,
>> + union power_supply_propval *val)
>> +{
>> + int ret;
>> + unsigned int rval;
>> +
>> + ret = regmap_field_read(charger->regmap_fields[fld], &rval);
>> + if (ret)
>> + return ret;
>> +
>> + val->intval = rval * props[fld].step + props[fld].min;
>> +
>> + return 0;
>> +}
>> +
>> +static int mp2629_set_prop(struct mp2629_charger *charger,
>> + enum mp2629_field fld,
>> + const union power_supply_propval *val)
>> +{
>> + unsigned int rval;
>> +
>> + if (val->intval < props[fld].min || val->intval > props[fld].max)
>> + return -EINVAL;
>> +
>> + rval = (val->intval - props[fld].min) / props[fld].step;
>> + return regmap_field_write(charger->regmap_fields[fld], rval);
>> +}
>> +
>> +static int mp2629_get_battery_capacity(struct mp2629_charger *charger,
>> + union power_supply_propval *val)
>> +{
>> + union power_supply_propval vnow, vlim;
>> + int ret;
>> +
>> + ret = mp2629_read_adc(charger, MP2629_BATT_VOLT, &vnow);
>> + if (ret)
>> + return ret;
>> +
>> + ret = mp2629_get_prop(charger, CHARGE_VLIM, &vlim);
>> + if (ret)
>> + return ret;
>> +
>> + val->intval = (vnow.intval * 100) / vlim.intval;
>> + val->intval = min(val->intval, MP2629_MAX_BATT_CAPACITY);
>> +
>> + return 0;
>> +}
> This looks like a very rough estimate. Voltage does not drop
> linearly for Li-Ion batteries. Is there a good reason for exposing
> this and not letting userspace taking care of this estimation?
Initially it was not clear for me from the datasheet, then checked with
chip vendor to arrive above
and reference graph share with me, the Vbatt was not linear during charging.
>> +static int mp2629_charger_battery_get_prop(struct power_supply *psy,
>> + enum power_supply_property psp,
>> + union power_supply_propval *val)
>> +{
>> + struct mp2629_charger *charger = dev_get_drvdata(psy->dev.parent);
>> + unsigned int rval;
>> + int ret = 0;
>> +
>> + switch (psp) {
>> + case POWER_SUPPLY_PROP_VOLTAGE_NOW:
>> + ret = mp2629_read_adc(charger, MP2629_BATT_VOLT, val);
>> + break;
>> +
>> + case POWER_SUPPLY_PROP_CURRENT_NOW:
>> + ret = mp2629_read_adc(charger, MP2629_BATT_CURRENT, val);
>> + break;
>> +
>> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
>> + val->intval = 4520000;
>> + break;
>> +
>> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
>> + val->intval = 4670000;
>> + break;
>> +
>> + case POWER_SUPPLY_PROP_CAPACITY:
>> + ret = mp2629_get_battery_capacity(charger, val);
>> + break;
>> +
>> + case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
>> + ret = mp2629_get_prop(charger, TERM_CURRENT, val);
>> + break;
>> +
>> + case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
>> + ret = mp2629_get_prop(charger, PRECHARGE, val);
>> + break;
>> +
>> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
>> + ret = mp2629_get_prop(charger, CHARGE_VLIM, val);
>> + break;
>> +
>> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
>> + ret = mp2629_get_prop(charger, CHARGE_ILIM, val);
>> + break;
>> +
>> + case POWER_SUPPLY_PROP_HEALTH:
>> + if (!charger->fault)
>> + val->intval = POWER_SUPPLY_HEALTH_GOOD;
>> + if (MP2629_FAULT_BATTERY & charger->fault)
>> + val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
>> + else if (MP2629_FAULT_THERMAL & charger->fault)
>> + val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
>> + else if (MP2629_FAULT_INPUT & charger->fault)
>> + val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
>> + break;
>> +
>> + case POWER_SUPPLY_PROP_STATUS:
>> + ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
>> + if (ret)
>> + break;
>> +
>> + rval = (rval & MP2629_MASK_CHARGE_TYPE) >> 3;
>> + switch (rval) {
>> + case 0x00:
>> + val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
>> + break;
> This should probably set POWER_SUPPLY_STATUS_DISCHARGING vs
> POWER_SUPPLY_STATUS_NOT_CHARGING based on the battery current.
> NOT_CHARGING means, that the battery is idle.
>
ok will change to DISCHARGING
>> + case 0x01:
>> + case 0x10:
>> + val->intval = POWER_SUPPLY_STATUS_CHARGING;
>> + break;
>> + case 0x11:
>> + val->intval = POWER_SUPPLY_STATUS_FULL;
>> + }
>> + break;
>> +
>> + case POWER_SUPPLY_PROP_CHARGE_TYPE:
>> + ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
>> + if (ret)
>> + break;
>> +
>> + rval = (rval & MP2629_MASK_CHARGE_TYPE) >> 3;
>> + switch (rval) {
>> + case 0x00:
>> + val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
>> + break;
>> + case 0x01:
>> + val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
>> + break;
>> + case 0x10:
>> + val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
>> + break;
>> + default:
>> + val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
>> + }
>> + break;
>> +
>> + default:
>> + return -EINVAL;
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +static int mp2629_charger_battery_set_prop(struct power_supply *psy,
>> + enum power_supply_property psp,
>> + const union power_supply_propval *val)
>> +{
>> + struct mp2629_charger *charger = dev_get_drvdata(psy->dev.parent);
>> +
>> + switch (psp) {
>> + case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
>> + return mp2629_set_prop(charger, TERM_CURRENT, val);
>> +
>> + case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
>> + return mp2629_set_prop(charger, PRECHARGE, val);
>> +
>> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
>> + return mp2629_set_prop(charger, CHARGE_VLIM, val);
>> +
>> + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
>> + return mp2629_set_prop(charger, CHARGE_ILIM, val);
>> +
>> + default:
>> + return -EINVAL;
>> + }
>> +}
>> +
>> +static int mp2629_charger_usb_get_prop(struct power_supply *psy,
>> + enum power_supply_property psp,
>> + union power_supply_propval *val)
>> +{
>> + struct mp2629_charger *charger = dev_get_drvdata(psy->dev.parent);
>> + unsigned int rval;
>> + int ret;
>> +
>> + switch (psp) {
>> + case POWER_SUPPLY_PROP_ONLINE:
>> + ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
>> + if (ret)
>> + break;
>> +
>> + val->intval = !!(rval & MP2629_MASK_INPUT_TYPE);
>> + break;
>> +
>> + case POWER_SUPPLY_PROP_USB_TYPE:
>> + ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
>> + if (ret)
>> + break;
>> +
>> + rval = (rval & MP2629_MASK_INPUT_TYPE) >> 5;
>> + switch (rval) {
>> + case MP2629_SOURCE_TYPE_SDP:
>> + val->intval = POWER_SUPPLY_USB_TYPE_SDP;
>> + break;
>> + case MP2629_SOURCE_TYPE_CDP:
>> + val->intval = POWER_SUPPLY_USB_TYPE_CDP;
>> + break;
>> + case MP2629_SOURCE_TYPE_DCP:
>> + val->intval = POWER_SUPPLY_USB_TYPE_DCP;
>> + break;
>> + case MP2629_SOURCE_TYPE_OTG:
>> + val->intval = POWER_SUPPLY_USB_TYPE_PD_DRP;
>> + break;
>> + default:
>> + val->intval = POWER_SUPPLY_USB_TYPE_UNKNOWN;
>> + break;
>> + }
>> + break;
>> +
>> + case POWER_SUPPLY_PROP_VOLTAGE_NOW:
>> + ret = mp2629_read_adc(charger, MP2629_INPUT_VOLT, val);
>> + break;
>> +
>> + case POWER_SUPPLY_PROP_CURRENT_NOW:
>> + ret = mp2629_read_adc(charger, MP2629_INPUT_CURRENT, val);
>> + break;
>> +
>> + case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
>> + ret = mp2629_get_prop(charger, INPUT_VLIM, val);
>> + break;
>> +
>> + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
>> + ret = mp2629_get_prop(charger, INPUT_ILIM, val);
>> + break;
>> +
>> + default:
>> + return -EINVAL;
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +static int mp2629_charger_usb_set_prop(struct power_supply *psy,
>> + enum power_supply_property psp,
>> + const union power_supply_propval *val)
>> +{
>> + struct mp2629_charger *charger = dev_get_drvdata(psy->dev.parent);
>> +
>> + switch (psp) {
>> + case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
>> + return mp2629_set_prop(charger, INPUT_VLIM, val);
>> +
>> + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
>> + return mp2629_set_prop(charger, INPUT_ILIM, val);
>> +
>> + default:
>> + return -EINVAL;
>> + }
>> +}
>> +
>> +static int mp2629_charger_battery_prop_writeable(struct power_supply *psy,
>> + enum power_supply_property psp)
>> +{
>> + return (psp == POWER_SUPPLY_PROP_PRECHARGE_CURRENT) ||
>> + (psp == POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT) ||
>> + (psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT) ||
>> + (psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE);
>> +}
>> +
>> +static int mp2629_charger_usb_prop_writeable(struct power_supply *psy,
>> + enum power_supply_property psp)
>> +{
>> + return (psp == POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT) ||
>> + (psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT);
>> +}
>> +
>> +static void mp2629_charger_work(struct work_struct *work)
>> +{
>> + struct mp2629_charger *charger;
>> + unsigned int rval;
>> + int ret;
>> +
>> + charger = container_of(work, struct mp2629_charger, charger_work);
>> +
>> + mutex_lock(&charger->lock);
>> +
>> + ret = regmap_read(charger->regmap, MP2629_REG_FAULT, &rval);
>> + if (ret)
>> + goto unlock;
>> +
>> + if (rval) {
>> + charger->fault = rval;
>> + if (MP2629_FAULT_BATTERY & rval)
>> + dev_err(charger->dev, "Battery fault OVP");
>> + else if (MP2629_FAULT_THERMAL & rval)
>> + dev_err(charger->dev, "Thermal shutdown fault");
>> + else if (MP2629_FAULT_INPUT & rval)
>> + dev_err(charger->dev, "no input or input OVP");
>> + else if (MP2629_FAULT_OTG & rval)
>> + dev_err(charger->dev, "VIN overloaded");
>> +
>> + goto unlock;
>> + }
>> +
>> + ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
>> + if (ret)
>> + goto unlock;
>> +
>> + if (rval & MP2629_INPUTSOURCE_CHANGE)
>> + power_supply_changed(charger->usb);
>> + else if (rval & MP2629_CHARGING_CHANGE)
>> + power_supply_changed(charger->battery);
>> +
>> +unlock:
>> + mutex_unlock(&charger->lock);
>> +}
>> +
>> +static irqreturn_t mp2629_irq_handler(int irq, void *dev_id)
>> +{
>> + struct mp2629_charger *charger = dev_id;
>> +
>> + schedule_work(&charger->charger_work);
>> + return IRQ_HANDLED;
>> +}
> The worker is only called here, so it is an open coded
> request_threaded_irq() without IRQF_ONESHOT. Please use
> the standard request_threaded_irq() and remove the worker.
>
> It simplifies the code and removes a race condition during
> driver removal: If any interrupt arrives between canceling
> the charger work and disabling the IRQ the driver might execute
> the worker with free'd resources.
ok
>> +static const struct power_supply_desc mp2629_usb_desc = {
>> + .name = "mp2629_usb",
>> + .type = POWER_SUPPLY_TYPE_USB,
>> + .usb_types = mp2629_usb_types,
>> + .num_usb_types = ARRAY_SIZE(mp2629_usb_types),
>> + .properties = mp2629_charger_usb_props,
>> + .num_properties = ARRAY_SIZE(mp2629_charger_usb_props),
>> + .get_property = mp2629_charger_usb_get_prop,
>> + .set_property = mp2629_charger_usb_set_prop,
>> + .property_is_writeable = mp2629_charger_usb_prop_writeable,
>> +};
>> +
>> +static const struct power_supply_desc mp2629_battery_desc = {
>> + .name = "mp2629_battery",
>> + .type = POWER_SUPPLY_TYPE_BATTERY,
>> + .properties = mp2629_charger_bat_props,
>> + .num_properties = ARRAY_SIZE(mp2629_charger_bat_props),
>> + .get_property = mp2629_charger_battery_get_prop,
>> + .set_property = mp2629_charger_battery_set_prop,
>> + .property_is_writeable = mp2629_charger_battery_prop_writeable,
>> +};
>> +
>> +static ssize_t batt_impedance_compensation_show(struct device *dev,
>> + struct device_attribute *attr,
>> + char *buf)
>> +{
>> + struct mp2629_charger *charger = dev_get_drvdata(dev->parent);
>> + unsigned int rval;
>> + int ret;
>> +
>> + ret = regmap_read(charger->regmap, MP2629_REG_IMPEDANCE_COMP, &rval);
>> + if (ret)
>> + return ret;
>> +
>> + rval = (rval >> 4) * 10;
>> + return sprintf(buf, "%d mohm\n", rval);
>> +}
>> +
>> +static ssize_t batt_impedance_compensation_store(struct device *dev,
>> + struct device_attribute *attr,
>> + const char *buf,
>> + size_t count)
>> +{
>> + struct mp2629_charger *charger = dev_get_drvdata(dev->parent);
>> + unsigned int val;
>> + int ret;
>> +
>> + ret = kstrtouint(buf, 10, &val);
>> + if (ret)
>> + return ret;
>> +
>> + if (val > 140)
>> + return -ERANGE;
>> +
>> + /* multiples of 10 mohm so round off */
>> + val = val / 10;
>> + ret = regmap_update_bits(charger->regmap, MP2629_REG_IMPEDANCE_COMP,
>> + MP2629_MASK_IMPEDANCE, val << 4);
>> + if (ret)
>> + return ret;
>> +
>> + return count;
>> +}
>> +
>> +static DEVICE_ATTR_RW(batt_impedance_compensation);
> Needs to be documented in device specific properties:
>
> Documentation/ABI/testing/sysfs-class-power
Covered as part of v8
>> +static struct attribute *mp2629_charger_sysfs_attrs[] = {
>> + &dev_attr_batt_impedance_compensation.attr,
>> + NULL
>> +};
>> +ATTRIBUTE_GROUPS(mp2629_charger_sysfs);
>> +
>> +static int mp2629_charger_probe(struct platform_device *pdev)
>> +{
>> + struct device *dev = &pdev->dev;
>> + struct mp2629_info *ddata = dev_get_drvdata(dev->parent);
>> + struct mp2629_charger *charger;
>> + struct power_supply_config psy_cfg = {};
>> + int ret, i, irq;
>> +
>> + charger = devm_kzalloc(dev, sizeof(*charger), GFP_KERNEL);
>> + if (!charger)
>> + return -ENOMEM;
>> +
>> + charger->regmap = ddata->regmap;
>> + charger->dev = dev;
>> + platform_set_drvdata(pdev, charger);
>> +
>> + for (i = 0; i < MP2629_MAX_FIELD; i++) {
>> + charger->regmap_fields[i] = devm_regmap_field_alloc(dev,
>> + charger->regmap, mp2629_reg_fields[i]);
>> + if (IS_ERR(charger->regmap_fields[i])) {
>> + dev_err(dev, "regmap field alloc fail %d\n", i);
>> + return PTR_ERR(charger->regmap_fields[i]);
>> + }
>> + }
>> +
>> + for (i = 0; i < MP2629_ADC_CHAN_END; i++) {
>> + charger->iiochan[i] = iio_channel_get(dev, adc_chan_name[i]);
> Why not devm_iio_channel_get() for further simplifying the code?
>
>> + if (IS_ERR(charger->iiochan[i])) {
>> + ret = PTR_ERR(charger->iiochan[i]);
>> + goto iio_fail;
>> + }
>> + }
>> +
>> + charger->usb = devm_power_supply_register(dev, &mp2629_usb_desc, NULL);
>> + if (IS_ERR(charger->usb)) {
>> + ret = PTR_ERR(charger->usb);
>> + goto iio_fail;
>> + }
> devm_ based resource allocation should not follow non-devm
> allocation without a very good reason. Usually we release resources
> in reverse allocation order, like unrolling a stack. Having a
> non-devm requested resource request before a devm resource request
> breaks this pattern.
ok will change to resource based
>> + psy_cfg.drv_data = charger;
>> + psy_cfg.attr_grp = mp2629_charger_sysfs_groups;
>> + charger->battery = devm_power_supply_register(dev,
>> + &mp2629_battery_desc, &psy_cfg);
>> + if (IS_ERR(charger->battery)) {
>> + ret = PTR_ERR(charger->battery);
>> + goto iio_fail;
>> + }
>> +
>> + ret = regmap_update_bits(charger->regmap, MP2629_REG_CHARGE_CTRL,
>> + MP2629_MASK_CHARGE_CTRL, BIT(4));
>> + if (ret) {
>> + dev_err(dev, "enable charge fail: %d\n", ret);
>> + goto iio_fail;
>> + }
>> +
>> + regmap_update_bits(charger->regmap, MP2629_REG_TIMER_CTRL,
>> + MP2629_MASK_WDOG_CTRL, 0);
>> +
>> + INIT_WORK(&charger->charger_work, mp2629_charger_work);
>> + mutex_init(&charger->lock);
>> +
>> + irq = platform_get_irq(to_platform_device(pdev->dev.parent), 0);
>> + if (irq) {
>> + ret = devm_request_irq(dev, irq, mp2629_irq_handler,
>> + IRQF_TRIGGER_RISING, "mp2629-charger",
>> + charger);
>> + if (ret) {
>> + dev_err(dev, "failed to request gpio IRQ\n");
>> + goto iio_fail;
>> + }
>> + }
>> +
>> + regmap_update_bits(charger->regmap, MP2629_REG_INTERRUPT,
>> + GENMASK(6, 5), BIT(6) | BIT(5));
>> +
>> + return 0;
>> +
>> +iio_fail:
>> + while (i--)
>> + iio_channel_release(charger->iiochan[i]);
>> +
>> + dev_err(dev, "driver register fail: %d\n", ret);
>> + return ret;
>> +}
>> +
>> +static int mp2629_charger_remove(struct platform_device *pdev)
>> +{
>> + struct mp2629_charger *charger = platform_get_drvdata(pdev);
>> + int i;
>> +
>> + cancel_work_sync(&charger->charger_work);
>> +
>> + for (i = 0; i < MP2629_ADC_CHAN_END; i++)
>> + iio_channel_release(charger->iiochan[i]);
>> +
>> + regmap_update_bits(charger->regmap, MP2629_REG_CHARGE_CTRL,
>> + MP2629_MASK_CHARGE_CTRL, 0);
>> + return 0;
>> +}
>> +
>> +static const struct of_device_id mp2629_charger_of_match[] = {
>> + { .compatible = "mps,mp2629_charger"},
>> + {}
>> +};
>> +MODULE_DEVICE_TABLE(of, mp2629_charger_of_match);
>> +
>> +static struct platform_driver mp2629_charger_driver = {
>> + .driver = {
>> + .name = "mp2629_charger",
>> + .of_match_table = mp2629_charger_of_match,
>> + },
>> + .probe = mp2629_charger_probe,
>> + .remove = mp2629_charger_remove,
>> +};
>> +module_platform_driver(mp2629_charger_driver);
>> +
>> +MODULE_AUTHOR("Saravanan Sekar <sravanhome@gmail.com>");
>> +MODULE_DESCRIPTION("MP2629 Charger driver");
>> +MODULE_LICENSE("GPL");
> -- Sebastian
^ permalink raw reply [flat|nested] 11+ messages in thread
end of thread, other threads:[~2020-04-15 13:44 UTC | newest]
Thread overview: 11+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-04-10 20:19 [PATCH v7 0/5] Add battery charger driver support for MP2629 Saravanan Sekar
2020-04-10 20:19 ` [PATCH v7 1/5] dt-bindings: mfd: add document bindings for mp2629 Saravanan Sekar
2020-04-10 20:19 ` [PATCH v7 2/5] mfd: mp2629: Add support for mps battery charger Saravanan Sekar
2020-04-10 20:19 ` [PATCH v7 3/5] iio: adc: mp2629: Add support for mp2629 ADC driver Saravanan Sekar
2020-04-12 9:58 ` Jonathan Cameron
2020-04-10 20:19 ` [PATCH v7 4/5] power: supply: Add support for mps mp2629 battery charger Saravanan Sekar
2020-04-11 10:15 ` Andy Shevchenko
2020-04-13 20:40 ` Sebastian Reichel
2020-04-15 13:44 ` saravanan sekar
2020-04-10 20:19 ` [PATCH v7 5/5] MAINTAINERS: Add entry for mp2629 Battery Charger driver Saravanan Sekar
2020-04-11 10:16 ` [PATCH v7 0/5] Add battery charger driver support for MP2629 Andy Shevchenko
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).