sy7636a EPD PMIC driver initial commit
Add multi-function device to interface the sy7636a EPD PMIC chip from Silergy. - Regulator driver for VCOM - Hwmon driver for thermistor temperature - MFD driver for i2c regmappull/10/head
Lars Ivar Miljeteig
Steinar Bakkemo
parent
f732531df4
commit
26f5dca610
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@ -1364,6 +1364,16 @@ config SENSORS_SIS5595
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This driver can also be built as a module. If so, the module
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will be called sis5595.
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config SENSORS_SY7636A
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tristate "Silergy SY7636A"
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depends on I2C
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help
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If you say yes here you get support for the thermistor readout of
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the Silergy SY7636A PMIC.
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This driver can also be built as a module. If so, the module
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will be called sy7636a-hwmon.
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config SENSORS_DME1737
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tristate "SMSC DME1737, SCH311x and compatibles"
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depends on I2C && !PPC
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@ -153,6 +153,7 @@ obj-$(CONFIG_SENSORS_SMSC47B397)+= smsc47b397.o
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obj-$(CONFIG_SENSORS_SMSC47M1) += smsc47m1.o
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obj-$(CONFIG_SENSORS_SMSC47M192)+= smsc47m192.o
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obj-$(CONFIG_SENSORS_STTS751) += stts751.o
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obj-$(CONFIG_SENSORS_SY7636A) += sy7636a-hwmon.o
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obj-$(CONFIG_SENSORS_AMC6821) += amc6821.o
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obj-$(CONFIG_SENSORS_TC74) += tc74.o
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obj-$(CONFIG_SENSORS_THMC50) += thmc50.o
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@ -0,0 +1,106 @@
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/*
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* Functions to access SY3686A power management chip temperature
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*
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* Copyright (C) 2019 reMarkable AS - http://www.remarkable.com/
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*
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* Author: Lars Ivar Miljeteig <lars.ivar.miljeteig@remarkable.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation version 2.
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*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any
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* kind, whether express or implied; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/jiffies.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/err.h>
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#include <linux/sysfs.h>
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#include <linux/platform_device.h>
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#include <linux/mfd/sy7636a.h>
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struct sy7636a_data {
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struct sy7636a *sy7636a;
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struct device *hwmon_dev;
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};
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static ssize_t show_temp(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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unsigned int reg_val;
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signed char temp;
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int ret;
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struct sy7636a_data *data = dev_get_drvdata(dev);
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ret = regmap_read(data->sy7636a->regmap,
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SY7636A_REG_TERMISTOR_READOUT, ®_val);
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if (ret)
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return ret;
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temp = *((signed char*)®_val);
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return snprintf(buf, PAGE_SIZE, "%d\n", temp);
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}
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static SENSOR_DEVICE_ATTR(temp0, S_IRUGO, show_temp, NULL, 0);
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static struct attribute *sy7636a_attrs[] = {
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&sensor_dev_attr_temp0.dev_attr.attr,
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NULL
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};
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ATTRIBUTE_GROUPS(sy7636a);
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static int sy7636a_sensor_probe(struct platform_device *pdev)
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{
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struct sy7636a *sy7636a = dev_get_drvdata(pdev->dev.parent);
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struct sy7636a_data *data;
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int err;
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if (!sy7636a)
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return -EPROBE_DEFER;
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data = devm_kzalloc(&pdev->dev, sizeof(struct sy7636a_data), GFP_KERNEL);
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if (!data) {
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return -ENOMEM;
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}
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data->sy7636a = sy7636a;
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data->hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev,
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"sy7636a_temperature", data, sy7636a_groups);
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if (IS_ERR(data->hwmon_dev)) {
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err = PTR_ERR(data->hwmon_dev);
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dev_err(&pdev->dev, "Unable to register hwmon device, returned %d", err);
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return err;
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}
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return 0;
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}
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static const struct platform_device_id sy7636a_sensor_id[] = {
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{ "sy7636a-temperature", 0},
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{ },
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};
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MODULE_DEVICE_TABLE(platform, sy7636a_sensor_id);
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static struct platform_driver sy7636a_sensor_driver = {
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.probe = sy7636a_sensor_probe,
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.id_table = sy7636a_sensor_id,
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.driver = {
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.name = "sy7636a-temperature",
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},
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};
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module_platform_driver(sy7636a_sensor_driver);
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MODULE_DESCRIPTION("SY7636A sensor driver");
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MODULE_LICENSE("GPL");
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@ -1307,6 +1307,16 @@ config MFD_PALMAS
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If you say yes here you get support for the Palmas
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series of PMIC chips from Texas Instruments.
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config MFD_SY7636A
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tristate "Silergy SY7636A Power Management chip driver"
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select MFD_CORE
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select REGMAP_I2C
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select REGMAP_IRQ
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depends on I2C=y
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help
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If you say yes here you get support for the SY7636A
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PMIC chip from Silergy
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config TPS6105X
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tristate "TI TPS61050/61052 Boost Converters"
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depends on I2C
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@ -218,6 +218,7 @@ obj-$(CONFIG_MFD_HI655X_PMIC) += hi655x-pmic.o
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obj-$(CONFIG_MFD_DLN2) += dln2.o
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obj-$(CONFIG_MFD_RT5033) += rt5033.o
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obj-$(CONFIG_MFD_SKY81452) += sky81452.o
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obj-$(CONFIG_MFD_SY7636A) += sy7636a.o
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obj-$(CONFIG_MFD_MXC_HDMI) += mxc-hdmi-core.o
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intel-soc-pmic-objs := intel_soc_pmic_core.o intel_soc_pmic_crc.o
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@ -0,0 +1,82 @@
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/*
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* Copyright (C) 2019 reMarkable AS - http://www.remarkable.com/
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*
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* Author: Lars Ivar Miljeteig <lars.ivar.miljeteig@remarkable.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation version 2.
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*
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* Based on the lp87565 driver by Keerthy <j-keerthy@ti.com>
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*/
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#include <linux/interrupt.h>
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#include <linux/mfd/core.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/regmap.h>
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#include <linux/mfd/sy7636a.h>
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static const struct regmap_config sy7636a_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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};
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static const struct mfd_cell sy7636a_cells[] = {
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{ .name = "sy7636a-regulator", },
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{ .name = "sy7636a-temperature", },
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};
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static const struct of_device_id of_sy7636a_match_table[] = {
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{ .compatible = "silergy,sy7636a", },
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{}
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};
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MODULE_DEVICE_TABLE(of, of_sy7636a_match_table);
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static int sy7636a_probe(struct i2c_client *client,
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const struct i2c_device_id *ids)
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{
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struct sy7636a *sy7636a;
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int ret;
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sy7636a = devm_kzalloc(&client->dev, sizeof(struct sy7636a), GFP_KERNEL);
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if (sy7636a == NULL)
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return -ENOMEM;
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sy7636a->dev = &client->dev;
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sy7636a->regmap = devm_regmap_init_i2c(client, &sy7636a_regmap_config);
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if (IS_ERR(sy7636a->regmap)) {
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ret = PTR_ERR(sy7636a->regmap);
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dev_err(sy7636a->dev,
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"Failed to initialize register map: %d\n", ret);
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return ret;
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}
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i2c_set_clientdata(client, sy7636a);
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return devm_mfd_add_devices(sy7636a->dev, PLATFORM_DEVID_AUTO,
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sy7636a_cells, ARRAY_SIZE(sy7636a_cells),
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NULL, 0, NULL);
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}
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static const struct i2c_device_id sy7636a_id_table[] = {
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{ "sy7636a", 0 },
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{ },
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};
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MODULE_DEVICE_TABLE(i2c, sy7636a_id_table);
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static struct i2c_driver sy7636a_driver = {
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.driver = {
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.name = "sy7636a",
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.of_match_table = of_sy7636a_match_table,
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},
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.probe = sy7636a_probe,
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.id_table = sy7636a_id_table,
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};
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module_i2c_driver(sy7636a_driver);
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MODULE_AUTHOR("Lars Ivar Miljeteig <lars.ivar.miljeteig@remarkable.com>");
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MODULE_DESCRIPTION("Silergy SY7636A Multi-Function Device Driver");
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MODULE_LICENSE("GPL v2");
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@ -787,6 +787,12 @@ config REGULATOR_SKY81452
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This driver can also be built as a module. If so, the module
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will be called sky81452-regulator.
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config REGULATOR_SY7636A
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tristate "Silergy SY7636A voltage regulator"
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depends on MFD_SY7636A
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help
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This driver supports Silergy SY3686A voltage regulator.
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config REGULATOR_STM32_VREFBUF
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tristate "STMicroelectronics STM32 VREFBUF"
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depends on ARCH_STM32 || COMPILE_TEST
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@ -101,6 +101,7 @@ obj-$(CONFIG_REGULATOR_S2MPA01) += s2mpa01.o
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obj-$(CONFIG_REGULATOR_S2MPS11) += s2mps11.o
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obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o
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obj-$(CONFIG_REGULATOR_SKY81452) += sky81452-regulator.o
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obj-$(CONFIG_REGULATOR_SY7636A) += sy7636a-regulator.o
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obj-$(CONFIG_REGULATOR_STM32_VREFBUF) += stm32-vrefbuf.o
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obj-$(CONFIG_REGULATOR_STW481X_VMMC) += stw481x-vmmc.o
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obj-$(CONFIG_REGULATOR_TI_ABB) += ti-abb-regulator.o
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@ -0,0 +1,97 @@
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/*
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* Functions to access SY3686A power management chip voltages
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*
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* Copyright (C) 2019 reMarkable AS - http://www.remarkable.com/
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*
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* Author: Lars Ivar Miljeteig <lars.ivar.miljeteig@remarkable.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation version 2.
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*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any
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* kind, whether express or implied; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/mfd/sy7636a.h>
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static int get_vcom_voltage(struct regulator_dev *rdev)
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{
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int ret;
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unsigned int val;
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ret = regmap_read(rdev->regmap, SY7636A_REG_VCOM_ADJUST_CTRL_L, &val);
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if (ret)
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return ret;
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return (val & 0x1FF) * 10;
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}
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static const struct regulator_ops sy7636a_vcom_volt_ops = {
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.get_voltage = get_vcom_voltage,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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};
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struct regulator_desc desc = {
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.name = "vcom",
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.supply_name = "vcom-in",
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.id = 0,
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.ops = &sy7636a_vcom_volt_ops,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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.enable_reg = SY7636A_REG_OPERATION_MODE_CRL,
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.enable_mask = SY7636A_OPERATION_MODE_CRL_ONOFF,
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};
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static int sy7636a_regulator_probe(struct platform_device *pdev)
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{
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struct sy7636a *sy7636a = dev_get_drvdata(pdev->dev.parent);
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struct regulator_config config = { };
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struct regulator_dev *rdev;
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if (!sy7636a)
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return -EPROBE_DEFER;
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platform_set_drvdata(pdev, sy7636a);
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config.dev = &pdev->dev;
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config.dev->of_node = sy7636a->dev->of_node;
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config.driver_data = sy7636a;
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config.regmap = sy7636a->regmap;
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rdev = devm_regulator_register(&pdev->dev, &desc, &config);
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if (IS_ERR(rdev)) {
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dev_err(sy7636a->dev, "failed to register %s regulator\n",
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pdev->name);
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return PTR_ERR(rdev);
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}
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return 0;
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}
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static const struct platform_device_id sy7636a_regulator_id_table[] = {
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{ "sy7636a-regulator", },
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};
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MODULE_DEVICE_TABLE(platform, sy7636a_regulator_id_table);
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static struct platform_driver sy7636a_regulator_driver = {
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.driver = {
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.name = "sy7636a-regulator",
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},
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.probe = sy7636a_regulator_probe,
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.id_table = sy7636a_regulator_id_table,
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};
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module_platform_driver(sy7636a_regulator_driver);
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MODULE_AUTHOR("Lars Ivar Miljeteig <lars.ivar.miljeteig@remarkable.com>");
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MODULE_DESCRIPTION("SY7636A voltage regulator driver");
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MODULE_LICENSE("GPL v2");
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@ -0,0 +1,42 @@
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/*
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* Functions to access SY3686A power management chip.
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*
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* Copyright (C) 2019 reMarkable AS - http://www.remarkable.com/
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation version 2.
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*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any
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* kind, whether express or implied; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __LINUX_MFD_SY7636A_H
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#define __LINUX_MFD_SY7636A_H
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#include <linux/i2c.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/regmap.h>
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#define SY7636A_REG_OPERATION_MODE_CRL 0x00
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#define SY7636A_OPERATION_MODE_CRL_VCOMCTL (1 << 6)
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#define SY7636A_OPERATION_MODE_CRL_ONOFF (1 << 7)
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#define SY7636A_REG_VCOM_ADJUST_CTRL_L 0x01
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#define SY7636A_REG_VCOM_ADJUST_CTRL_H 0x02
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#define SY7636A_REG_VCOM_ADJUST_CTRL_MASK 0x01ff
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#define SY7636A_REG_VLDO_VOLTAGE_ADJULST_CTRL 0x03
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#define SY7636A_REG_POWER_ON_DELAY_TIME 0x06
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#define SY7636A_REG_FAULT_FLAG 0x07
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#define SY7636A_REG_TERMISTOR_READOUT 0x08
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#define SY7636A_REG_MAX 0x08
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struct sy7636a {
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struct device *dev;
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struct regmap *regmap;
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};
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#endif /* __LINUX_MFD_SY7636A_H */
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