513 строки
14 KiB
C
513 строки
14 KiB
C
/*
|
|
* HWMON Driver for Dialog DA9052
|
|
*
|
|
* Copyright(c) 2012 Dialog Semiconductor Ltd.
|
|
*
|
|
* Author: David Dajun Chen <dchen@diasemi.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*
|
|
*/
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/hwmon.h>
|
|
#include <linux/hwmon-sysfs.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/property.h>
|
|
|
|
#include <linux/mfd/da9052/da9052.h>
|
|
#include <linux/mfd/da9052/reg.h>
|
|
#include <linux/regulator/consumer.h>
|
|
|
|
struct da9052_hwmon {
|
|
struct da9052 *da9052;
|
|
struct mutex hwmon_lock;
|
|
bool tsi_as_adc;
|
|
int tsiref_mv;
|
|
struct regulator *tsiref;
|
|
struct completion tsidone;
|
|
};
|
|
|
|
static const char * const input_names[] = {
|
|
[DA9052_ADC_VDDOUT] = "VDDOUT",
|
|
[DA9052_ADC_ICH] = "CHARGING CURRENT",
|
|
[DA9052_ADC_TBAT] = "BATTERY TEMP",
|
|
[DA9052_ADC_VBAT] = "BATTERY VOLTAGE",
|
|
[DA9052_ADC_IN4] = "ADC IN4",
|
|
[DA9052_ADC_IN5] = "ADC IN5",
|
|
[DA9052_ADC_IN6] = "ADC IN6",
|
|
[DA9052_ADC_TSI_XP] = "ADC TS X+",
|
|
[DA9052_ADC_TSI_YP] = "ADC TS Y+",
|
|
[DA9052_ADC_TSI_XN] = "ADC TS X-",
|
|
[DA9052_ADC_TSI_YN] = "ADC TS Y-",
|
|
[DA9052_ADC_TJUNC] = "BATTERY JUNCTION TEMP",
|
|
[DA9052_ADC_VBBAT] = "BACK-UP BATTERY VOLTAGE",
|
|
};
|
|
|
|
/* Conversion function for VDDOUT and VBAT */
|
|
static inline int volt_reg_to_mv(int value)
|
|
{
|
|
return DIV_ROUND_CLOSEST(value * 2000, 1023) + 2500;
|
|
}
|
|
|
|
/* Conversion function for ADC channels 4, 5 and 6 */
|
|
static inline int input_reg_to_mv(int value)
|
|
{
|
|
return DIV_ROUND_CLOSEST(value * 2500, 1023);
|
|
}
|
|
|
|
/* Conversion function for VBBAT */
|
|
static inline int vbbat_reg_to_mv(int value)
|
|
{
|
|
return DIV_ROUND_CLOSEST(value * 5000, 1023);
|
|
}
|
|
|
|
static inline int input_tsireg_to_mv(struct da9052_hwmon *hwmon, int value)
|
|
{
|
|
return DIV_ROUND_CLOSEST(value * hwmon->tsiref_mv, 1023);
|
|
}
|
|
|
|
static inline int da9052_enable_vddout_channel(struct da9052 *da9052)
|
|
{
|
|
return da9052_reg_update(da9052, DA9052_ADC_CONT_REG,
|
|
DA9052_ADCCONT_AUTOVDDEN,
|
|
DA9052_ADCCONT_AUTOVDDEN);
|
|
}
|
|
|
|
static inline int da9052_disable_vddout_channel(struct da9052 *da9052)
|
|
{
|
|
return da9052_reg_update(da9052, DA9052_ADC_CONT_REG,
|
|
DA9052_ADCCONT_AUTOVDDEN, 0);
|
|
}
|
|
|
|
static ssize_t da9052_vddout_show(struct device *dev,
|
|
struct device_attribute *devattr, char *buf)
|
|
{
|
|
struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
|
|
int ret, vdd;
|
|
|
|
mutex_lock(&hwmon->hwmon_lock);
|
|
|
|
ret = da9052_enable_vddout_channel(hwmon->da9052);
|
|
if (ret < 0)
|
|
goto hwmon_err;
|
|
|
|
vdd = da9052_reg_read(hwmon->da9052, DA9052_VDD_RES_REG);
|
|
if (vdd < 0) {
|
|
ret = vdd;
|
|
goto hwmon_err_release;
|
|
}
|
|
|
|
ret = da9052_disable_vddout_channel(hwmon->da9052);
|
|
if (ret < 0)
|
|
goto hwmon_err;
|
|
|
|
mutex_unlock(&hwmon->hwmon_lock);
|
|
return sprintf(buf, "%d\n", volt_reg_to_mv(vdd));
|
|
|
|
hwmon_err_release:
|
|
da9052_disable_vddout_channel(hwmon->da9052);
|
|
hwmon_err:
|
|
mutex_unlock(&hwmon->hwmon_lock);
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t da9052_ich_show(struct device *dev,
|
|
struct device_attribute *devattr, char *buf)
|
|
{
|
|
struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
ret = da9052_reg_read(hwmon->da9052, DA9052_ICHG_AV_REG);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* Equivalent to 3.9mA/bit in register ICHG_AV */
|
|
return sprintf(buf, "%d\n", DIV_ROUND_CLOSEST(ret * 39, 10));
|
|
}
|
|
|
|
static ssize_t da9052_tbat_show(struct device *dev,
|
|
struct device_attribute *devattr, char *buf)
|
|
{
|
|
struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
|
|
|
|
return sprintf(buf, "%d\n", da9052_adc_read_temp(hwmon->da9052));
|
|
}
|
|
|
|
static ssize_t da9052_vbat_show(struct device *dev,
|
|
struct device_attribute *devattr, char *buf)
|
|
{
|
|
struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
ret = da9052_adc_manual_read(hwmon->da9052, DA9052_ADC_VBAT);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return sprintf(buf, "%d\n", volt_reg_to_mv(ret));
|
|
}
|
|
|
|
static ssize_t da9052_misc_channel_show(struct device *dev,
|
|
struct device_attribute *devattr,
|
|
char *buf)
|
|
{
|
|
struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
|
|
int channel = to_sensor_dev_attr(devattr)->index;
|
|
int ret;
|
|
|
|
ret = da9052_adc_manual_read(hwmon->da9052, channel);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return sprintf(buf, "%d\n", input_reg_to_mv(ret));
|
|
}
|
|
|
|
static int da9052_request_tsi_read(struct da9052_hwmon *hwmon, int channel)
|
|
{
|
|
u8 val = DA9052_TSICONTB_TSIMAN;
|
|
|
|
switch (channel) {
|
|
case DA9052_ADC_TSI_XP:
|
|
val |= DA9052_TSICONTB_TSIMUX_XP;
|
|
break;
|
|
case DA9052_ADC_TSI_YP:
|
|
val |= DA9052_TSICONTB_TSIMUX_YP;
|
|
break;
|
|
case DA9052_ADC_TSI_XN:
|
|
val |= DA9052_TSICONTB_TSIMUX_XN;
|
|
break;
|
|
case DA9052_ADC_TSI_YN:
|
|
val |= DA9052_TSICONTB_TSIMUX_YN;
|
|
break;
|
|
}
|
|
|
|
return da9052_reg_write(hwmon->da9052, DA9052_TSI_CONT_B_REG, val);
|
|
}
|
|
|
|
static int da9052_get_tsi_result(struct da9052_hwmon *hwmon, int channel)
|
|
{
|
|
u8 regs[3];
|
|
int msb, lsb, err;
|
|
|
|
/* block read to avoid separation of MSB and LSB */
|
|
err = da9052_group_read(hwmon->da9052, DA9052_TSI_X_MSB_REG,
|
|
ARRAY_SIZE(regs), regs);
|
|
if (err)
|
|
return err;
|
|
|
|
switch (channel) {
|
|
case DA9052_ADC_TSI_XP:
|
|
case DA9052_ADC_TSI_XN:
|
|
msb = regs[0] << DA9052_TSILSB_TSIXL_BITS;
|
|
lsb = regs[2] & DA9052_TSILSB_TSIXL;
|
|
lsb >>= DA9052_TSILSB_TSIXL_SHIFT;
|
|
break;
|
|
case DA9052_ADC_TSI_YP:
|
|
case DA9052_ADC_TSI_YN:
|
|
msb = regs[1] << DA9052_TSILSB_TSIYL_BITS;
|
|
lsb = regs[2] & DA9052_TSILSB_TSIYL;
|
|
lsb >>= DA9052_TSILSB_TSIYL_SHIFT;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return msb | lsb;
|
|
}
|
|
|
|
|
|
static ssize_t __da9052_read_tsi(struct device *dev, int channel)
|
|
{
|
|
struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
reinit_completion(&hwmon->tsidone);
|
|
|
|
ret = da9052_request_tsi_read(hwmon, channel);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* Wait for an conversion done interrupt */
|
|
if (!wait_for_completion_timeout(&hwmon->tsidone,
|
|
msecs_to_jiffies(500)))
|
|
return -ETIMEDOUT;
|
|
|
|
return da9052_get_tsi_result(hwmon, channel);
|
|
}
|
|
|
|
static ssize_t da9052_tsi_show(struct device *dev,
|
|
struct device_attribute *devattr, char *buf)
|
|
{
|
|
struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
|
|
int channel = to_sensor_dev_attr(devattr)->index;
|
|
int ret;
|
|
|
|
mutex_lock(&hwmon->hwmon_lock);
|
|
ret = __da9052_read_tsi(dev, channel);
|
|
mutex_unlock(&hwmon->hwmon_lock);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
else
|
|
return sprintf(buf, "%d\n", input_tsireg_to_mv(hwmon, ret));
|
|
}
|
|
|
|
static ssize_t da9052_tjunc_show(struct device *dev,
|
|
struct device_attribute *devattr, char *buf)
|
|
{
|
|
struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
|
|
int tjunc;
|
|
int toffset;
|
|
|
|
tjunc = da9052_reg_read(hwmon->da9052, DA9052_TJUNC_RES_REG);
|
|
if (tjunc < 0)
|
|
return tjunc;
|
|
|
|
toffset = da9052_reg_read(hwmon->da9052, DA9052_T_OFFSET_REG);
|
|
if (toffset < 0)
|
|
return toffset;
|
|
|
|
/*
|
|
* Degrees celsius = 1.708 * (TJUNC_RES - T_OFFSET) - 108.8
|
|
* T_OFFSET is a trim value used to improve accuracy of the result
|
|
*/
|
|
return sprintf(buf, "%d\n", 1708 * (tjunc - toffset) - 108800);
|
|
}
|
|
|
|
static ssize_t da9052_vbbat_show(struct device *dev,
|
|
struct device_attribute *devattr, char *buf)
|
|
{
|
|
struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
ret = da9052_adc_manual_read(hwmon->da9052, DA9052_ADC_VBBAT);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return sprintf(buf, "%d\n", vbbat_reg_to_mv(ret));
|
|
}
|
|
|
|
static ssize_t label_show(struct device *dev,
|
|
struct device_attribute *devattr, char *buf)
|
|
{
|
|
return sprintf(buf, "%s\n",
|
|
input_names[to_sensor_dev_attr(devattr)->index]);
|
|
}
|
|
|
|
static umode_t da9052_channel_is_visible(struct kobject *kobj,
|
|
struct attribute *attr, int index)
|
|
{
|
|
struct device *dev = container_of(kobj, struct device, kobj);
|
|
struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
|
|
struct device_attribute *dattr = container_of(attr,
|
|
struct device_attribute, attr);
|
|
struct sensor_device_attribute *sattr = to_sensor_dev_attr(dattr);
|
|
|
|
if (!hwmon->tsi_as_adc) {
|
|
switch (sattr->index) {
|
|
case DA9052_ADC_TSI_XP:
|
|
case DA9052_ADC_TSI_YP:
|
|
case DA9052_ADC_TSI_XN:
|
|
case DA9052_ADC_TSI_YN:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return attr->mode;
|
|
}
|
|
|
|
static SENSOR_DEVICE_ATTR_RO(in0_input, da9052_vddout, DA9052_ADC_VDDOUT);
|
|
static SENSOR_DEVICE_ATTR_RO(in0_label, label, DA9052_ADC_VDDOUT);
|
|
static SENSOR_DEVICE_ATTR_RO(in3_input, da9052_vbat, DA9052_ADC_VBAT);
|
|
static SENSOR_DEVICE_ATTR_RO(in3_label, label, DA9052_ADC_VBAT);
|
|
static SENSOR_DEVICE_ATTR_RO(in4_input, da9052_misc_channel, DA9052_ADC_IN4);
|
|
static SENSOR_DEVICE_ATTR_RO(in4_label, label, DA9052_ADC_IN4);
|
|
static SENSOR_DEVICE_ATTR_RO(in5_input, da9052_misc_channel, DA9052_ADC_IN5);
|
|
static SENSOR_DEVICE_ATTR_RO(in5_label, label, DA9052_ADC_IN5);
|
|
static SENSOR_DEVICE_ATTR_RO(in6_input, da9052_misc_channel, DA9052_ADC_IN6);
|
|
static SENSOR_DEVICE_ATTR_RO(in6_label, label, DA9052_ADC_IN6);
|
|
static SENSOR_DEVICE_ATTR_RO(in9_input, da9052_vbbat, DA9052_ADC_VBBAT);
|
|
static SENSOR_DEVICE_ATTR_RO(in9_label, label, DA9052_ADC_VBBAT);
|
|
|
|
static SENSOR_DEVICE_ATTR_RO(in70_input, da9052_tsi, DA9052_ADC_TSI_XP);
|
|
static SENSOR_DEVICE_ATTR_RO(in70_label, label, DA9052_ADC_TSI_XP);
|
|
static SENSOR_DEVICE_ATTR_RO(in71_input, da9052_tsi, DA9052_ADC_TSI_XN);
|
|
static SENSOR_DEVICE_ATTR_RO(in71_label, label, DA9052_ADC_TSI_XN);
|
|
static SENSOR_DEVICE_ATTR_RO(in72_input, da9052_tsi, DA9052_ADC_TSI_YP);
|
|
static SENSOR_DEVICE_ATTR_RO(in72_label, label, DA9052_ADC_TSI_YP);
|
|
static SENSOR_DEVICE_ATTR_RO(in73_input, da9052_tsi, DA9052_ADC_TSI_YN);
|
|
static SENSOR_DEVICE_ATTR_RO(in73_label, label, DA9052_ADC_TSI_YN);
|
|
|
|
static SENSOR_DEVICE_ATTR_RO(curr1_input, da9052_ich, DA9052_ADC_ICH);
|
|
static SENSOR_DEVICE_ATTR_RO(curr1_label, label, DA9052_ADC_ICH);
|
|
|
|
static SENSOR_DEVICE_ATTR_RO(temp2_input, da9052_tbat, DA9052_ADC_TBAT);
|
|
static SENSOR_DEVICE_ATTR_RO(temp2_label, label, DA9052_ADC_TBAT);
|
|
static SENSOR_DEVICE_ATTR_RO(temp8_input, da9052_tjunc, DA9052_ADC_TJUNC);
|
|
static SENSOR_DEVICE_ATTR_RO(temp8_label, label, DA9052_ADC_TJUNC);
|
|
|
|
static struct attribute *da9052_attrs[] = {
|
|
&sensor_dev_attr_in0_input.dev_attr.attr,
|
|
&sensor_dev_attr_in0_label.dev_attr.attr,
|
|
&sensor_dev_attr_in3_input.dev_attr.attr,
|
|
&sensor_dev_attr_in3_label.dev_attr.attr,
|
|
&sensor_dev_attr_in4_input.dev_attr.attr,
|
|
&sensor_dev_attr_in4_label.dev_attr.attr,
|
|
&sensor_dev_attr_in5_input.dev_attr.attr,
|
|
&sensor_dev_attr_in5_label.dev_attr.attr,
|
|
&sensor_dev_attr_in6_input.dev_attr.attr,
|
|
&sensor_dev_attr_in6_label.dev_attr.attr,
|
|
&sensor_dev_attr_in70_input.dev_attr.attr,
|
|
&sensor_dev_attr_in70_label.dev_attr.attr,
|
|
&sensor_dev_attr_in71_input.dev_attr.attr,
|
|
&sensor_dev_attr_in71_label.dev_attr.attr,
|
|
&sensor_dev_attr_in72_input.dev_attr.attr,
|
|
&sensor_dev_attr_in72_label.dev_attr.attr,
|
|
&sensor_dev_attr_in73_input.dev_attr.attr,
|
|
&sensor_dev_attr_in73_label.dev_attr.attr,
|
|
&sensor_dev_attr_in9_input.dev_attr.attr,
|
|
&sensor_dev_attr_in9_label.dev_attr.attr,
|
|
&sensor_dev_attr_curr1_input.dev_attr.attr,
|
|
&sensor_dev_attr_curr1_label.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_label.dev_attr.attr,
|
|
&sensor_dev_attr_temp8_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp8_label.dev_attr.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group da9052_group = {
|
|
.attrs = da9052_attrs,
|
|
.is_visible = da9052_channel_is_visible,
|
|
};
|
|
__ATTRIBUTE_GROUPS(da9052);
|
|
|
|
static irqreturn_t da9052_tsi_datardy_irq(int irq, void *data)
|
|
{
|
|
struct da9052_hwmon *hwmon = data;
|
|
|
|
complete(&hwmon->tsidone);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int da9052_hwmon_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct da9052_hwmon *hwmon;
|
|
struct device *hwmon_dev;
|
|
int err;
|
|
|
|
hwmon = devm_kzalloc(dev, sizeof(struct da9052_hwmon), GFP_KERNEL);
|
|
if (!hwmon)
|
|
return -ENOMEM;
|
|
|
|
platform_set_drvdata(pdev, hwmon);
|
|
|
|
mutex_init(&hwmon->hwmon_lock);
|
|
hwmon->da9052 = dev_get_drvdata(pdev->dev.parent);
|
|
|
|
init_completion(&hwmon->tsidone);
|
|
|
|
hwmon->tsi_as_adc =
|
|
device_property_read_bool(pdev->dev.parent, "dlg,tsi-as-adc");
|
|
|
|
if (hwmon->tsi_as_adc) {
|
|
hwmon->tsiref = devm_regulator_get(pdev->dev.parent, "tsiref");
|
|
if (IS_ERR(hwmon->tsiref)) {
|
|
err = PTR_ERR(hwmon->tsiref);
|
|
dev_err(&pdev->dev, "failed to get tsiref: %d", err);
|
|
return err;
|
|
}
|
|
|
|
err = regulator_enable(hwmon->tsiref);
|
|
if (err)
|
|
return err;
|
|
|
|
hwmon->tsiref_mv = regulator_get_voltage(hwmon->tsiref);
|
|
if (hwmon->tsiref_mv < 0) {
|
|
err = hwmon->tsiref_mv;
|
|
goto exit_regulator;
|
|
}
|
|
|
|
/* convert from microvolt (DT) to millivolt (hwmon) */
|
|
hwmon->tsiref_mv /= 1000;
|
|
|
|
/* TSIREF limits from datasheet */
|
|
if (hwmon->tsiref_mv < 1800 || hwmon->tsiref_mv > 2600) {
|
|
dev_err(hwmon->da9052->dev, "invalid TSIREF voltage: %d",
|
|
hwmon->tsiref_mv);
|
|
err = -ENXIO;
|
|
goto exit_regulator;
|
|
}
|
|
|
|
/* disable touchscreen features */
|
|
da9052_reg_write(hwmon->da9052, DA9052_TSI_CONT_A_REG, 0x00);
|
|
|
|
/* Sample every 1ms */
|
|
da9052_reg_update(hwmon->da9052, DA9052_ADC_CONT_REG,
|
|
DA9052_ADCCONT_ADCMODE,
|
|
DA9052_ADCCONT_ADCMODE);
|
|
|
|
err = da9052_request_irq(hwmon->da9052, DA9052_IRQ_TSIREADY,
|
|
"tsiready-irq", da9052_tsi_datardy_irq,
|
|
hwmon);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "Failed to register TSIRDY IRQ: %d",
|
|
err);
|
|
goto exit_regulator;
|
|
}
|
|
}
|
|
|
|
hwmon_dev = devm_hwmon_device_register_with_groups(dev, "da9052",
|
|
hwmon,
|
|
da9052_groups);
|
|
err = PTR_ERR_OR_ZERO(hwmon_dev);
|
|
if (err)
|
|
goto exit_irq;
|
|
|
|
return 0;
|
|
|
|
exit_irq:
|
|
if (hwmon->tsi_as_adc)
|
|
da9052_free_irq(hwmon->da9052, DA9052_IRQ_TSIREADY, hwmon);
|
|
exit_regulator:
|
|
if (hwmon->tsiref)
|
|
regulator_disable(hwmon->tsiref);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int da9052_hwmon_remove(struct platform_device *pdev)
|
|
{
|
|
struct da9052_hwmon *hwmon = platform_get_drvdata(pdev);
|
|
|
|
if (hwmon->tsi_as_adc) {
|
|
da9052_free_irq(hwmon->da9052, DA9052_IRQ_TSIREADY, hwmon);
|
|
regulator_disable(hwmon->tsiref);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver da9052_hwmon_driver = {
|
|
.probe = da9052_hwmon_probe,
|
|
.remove = da9052_hwmon_remove,
|
|
.driver = {
|
|
.name = "da9052-hwmon",
|
|
},
|
|
};
|
|
|
|
module_platform_driver(da9052_hwmon_driver);
|
|
|
|
MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
|
|
MODULE_DESCRIPTION("DA9052 HWMON driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:da9052-hwmon");
|