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authorSaravanan Sekar <sravanhome@gmail.com>2020-05-26 12:06:42 +0300
committerLee Jones <lee.jones@linaro.org>2020-05-26 12:41:40 +0300
commit06081646450e46efcc1ca58c3b227bd60083cd3e (patch)
treeb763b4fcb0c69be22852618a19e86b0efab5cdd7 /drivers/mfd
parent25c8c452ff45e9376c0b664d549fe2f57ee9d602 (diff)
downloadlinux-06081646450e46efcc1ca58c3b227bd60083cd3e.tar.xz
mfd: mp2629: Add support for mps battery charger
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> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/Kconfig9
-rw-r--r--drivers/mfd/Makefile2
-rw-r--r--drivers/mfd/mp2629.c79
3 files changed, 90 insertions, 0 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 0a59249198d3..3526a03855be 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 Systems MP2629 ADC and Battery charger"
+ depends on I2C
+ select REGMAP_I2C
+ help
+ Select this option to enable support for Monolithic Power Systems
+ battery charger. This provides ADC, thermal and battery charger power
+ management functions.
+
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..16840ec5fd1c
--- /dev/null
+++ b/drivers/mfd/mp2629.c
@@ -0,0 +1,79 @@
+// 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>
+
+static const struct mfd_cell mp2629_cell[] = {
+ {
+ .name = "mp2629_adc",
+ .of_compatible = "mps,mp2629_adc",
+ },
+ {
+ .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_data *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_AUTO, mp2629_cell,
+ ARRAY_SIZE(mp2629_cell), 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");