rM2: hwmon: Copy the rM2 sy7636a-hwmon driver
Copy the rM2 zero-sugar branch (https://github.com/reMarkable/linux/tree/zero-sugar) to the new kernel. Signed-off-by: Alistair Francis <alistair@alistair23.me>5.4-rM2-2.2.x-imx-deep-sleep
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947d13cb95
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61f72c26e7
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@ -1424,6 +1424,16 @@ 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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@ -159,6 +159,7 @@ 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 +1,105 @@
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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_AUTHOR("Lars Ivar Miljeteig <lars.ivar.miljeteig@remarkable.com>");
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MODULE_DESCRIPTION("Silergy SY7636A Sensor Driver");
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MODULE_LICENSE("GPL v2");
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@ -0,0 +1,49 @@
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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_FAULT_FLAG_PG (1 << 0)
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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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unsigned int vcom;
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struct gpio_desc *pgood_gpio;
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struct mutex reglock;
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};
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int get_vcom_voltage_mv(struct regmap *regmap);
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int set_vcom_voltage_mv(struct regmap *regmap, unsigned int vcom);
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#endif /* __LINUX_MFD_SY7636A_H */
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