summaryrefslogtreecommitdiff
path: root/drivers/hwmon/da9052-hwmon.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/hwmon/da9052-hwmon.c')
-rw-r--r--drivers/hwmon/da9052-hwmon.c343
1 files changed, 250 insertions, 93 deletions
diff --git a/drivers/hwmon/da9052-hwmon.c b/drivers/hwmon/da9052-hwmon.c
index 960fac3fb166..588e96790850 100644
--- a/drivers/hwmon/da9052-hwmon.c
+++ b/drivers/hwmon/da9052-hwmon.c
@@ -1,15 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* 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>
@@ -20,14 +15,18 @@
#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 device *class_device;
- struct mutex hwmon_lock;
+ struct da9052 *da9052;
+ struct mutex hwmon_lock;
+ bool tsi_as_adc;
+ int tsiref_mv;
+ struct completion tsidone;
};
static const char * const input_names[] = {
@@ -38,6 +37,10 @@ static const char * const input_names[] = {
[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",
};
@@ -45,7 +48,7 @@ static const char * const input_names[] = {
/* Conversion function for VDDOUT and VBAT */
static inline int volt_reg_to_mv(int value)
{
- return DIV_ROUND_CLOSEST(value * 1000, 512) + 2500;
+ return DIV_ROUND_CLOSEST(value * 2000, 1023) + 2500;
}
/* Conversion function for ADC channels 4, 5 and 6 */
@@ -57,7 +60,12 @@ static inline int input_reg_to_mv(int value)
/* Conversion function for VBBAT */
static inline int vbbat_reg_to_mv(int value)
{
- return DIV_ROUND_CLOSEST(value * 2500, 512);
+ 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)
@@ -73,7 +81,7 @@ static inline int da9052_disable_vddout_channel(struct da9052 *da9052)
DA9052_ADCCONT_AUTOVDDEN, 0);
}
-static ssize_t da9052_read_vddout(struct device *dev,
+static ssize_t da9052_vddout_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
@@ -105,7 +113,7 @@ hwmon_err:
return ret;
}
-static ssize_t da9052_read_ich(struct device *dev,
+static ssize_t da9052_ich_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
@@ -119,7 +127,7 @@ static ssize_t da9052_read_ich(struct device *dev,
return sprintf(buf, "%d\n", DIV_ROUND_CLOSEST(ret * 39, 10));
}
-static ssize_t da9052_read_tbat(struct device *dev,
+static ssize_t da9052_tbat_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
@@ -127,7 +135,7 @@ static ssize_t da9052_read_tbat(struct device *dev,
return sprintf(buf, "%d\n", da9052_adc_read_temp(hwmon->da9052));
}
-static ssize_t da9052_read_vbat(struct device *dev,
+static ssize_t da9052_vbat_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
@@ -140,7 +148,7 @@ static ssize_t da9052_read_vbat(struct device *dev,
return sprintf(buf, "%d\n", volt_reg_to_mv(ret));
}
-static ssize_t da9052_read_misc_channel(struct device *dev,
+static ssize_t da9052_misc_channel_show(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
@@ -155,7 +163,97 @@ static ssize_t da9052_read_misc_channel(struct device *dev,
return sprintf(buf, "%d\n", input_reg_to_mv(ret));
}
-static ssize_t da9052_read_tjunc(struct device *dev,
+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->da9052->auxadc_lock);
+ ret = __da9052_read_tsi(dev, channel);
+ mutex_unlock(&hwmon->da9052->auxadc_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);
@@ -177,7 +275,7 @@ static ssize_t da9052_read_tjunc(struct device *dev,
return sprintf(buf, "%d\n", 1708 * (tjunc - toffset) - 108800);
}
-static ssize_t da9052_read_vbbat(struct device *dev,
+static ssize_t da9052_vbbat_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
@@ -190,63 +288,66 @@ static ssize_t da9052_read_vbbat(struct device *dev,
return sprintf(buf, "%d\n", vbbat_reg_to_mv(ret));
}
-static ssize_t da9052_hwmon_show_name(struct device *dev,
- struct device_attribute *devattr,
- char *buf)
-{
- return sprintf(buf, "da9052-hwmon\n");
-}
-
-static ssize_t show_label(struct device *dev,
+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 SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, da9052_read_vddout, NULL,
- DA9052_ADC_VDDOUT);
-static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_label, NULL,
- DA9052_ADC_VDDOUT);
-static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, da9052_read_vbat, NULL,
- DA9052_ADC_VBAT);
-static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL,
- DA9052_ADC_VBAT);
-static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, da9052_read_misc_channel, NULL,
- DA9052_ADC_IN4);
-static SENSOR_DEVICE_ATTR(in4_label, S_IRUGO, show_label, NULL,
- DA9052_ADC_IN4);
-static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, da9052_read_misc_channel, NULL,
- DA9052_ADC_IN5);
-static SENSOR_DEVICE_ATTR(in5_label, S_IRUGO, show_label, NULL,
- DA9052_ADC_IN5);
-static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, da9052_read_misc_channel, NULL,
- DA9052_ADC_IN6);
-static SENSOR_DEVICE_ATTR(in6_label, S_IRUGO, show_label, NULL,
- DA9052_ADC_IN6);
-static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, da9052_read_vbbat, NULL,
- DA9052_ADC_VBBAT);
-static SENSOR_DEVICE_ATTR(in9_label, S_IRUGO, show_label, NULL,
- DA9052_ADC_VBBAT);
-
-static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, da9052_read_ich, NULL,
- DA9052_ADC_ICH);
-static SENSOR_DEVICE_ATTR(curr1_label, S_IRUGO, show_label, NULL,
- DA9052_ADC_ICH);
-
-static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, da9052_read_tbat, NULL,
- DA9052_ADC_TBAT);
-static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, show_label, NULL,
- DA9052_ADC_TBAT);
-static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, da9052_read_tjunc, NULL,
- DA9052_ADC_TJUNC);
-static SENSOR_DEVICE_ATTR(temp8_label, S_IRUGO, show_label, NULL,
- DA9052_ADC_TJUNC);
-
-static DEVICE_ATTR(name, S_IRUGO, da9052_hwmon_show_name, NULL);
-
-static struct attribute *da9052_attr[] = {
- &dev_attr_name.attr,
+static umode_t da9052_channel_is_visible(struct kobject *kobj,
+ struct attribute *attr, int index)
+{
+ struct device *dev = kobj_to_dev(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,
@@ -257,6 +358,14 @@ static struct attribute *da9052_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,
@@ -268,49 +377,98 @@ static struct attribute *da9052_attr[] = {
NULL
};
-static const struct attribute_group da9052_attr_group = {.attrs = da9052_attr};
+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;
- int ret;
+ struct device *hwmon_dev;
+ int err, tsiref_uv;
- hwmon = devm_kzalloc(&pdev->dev, sizeof(struct da9052_hwmon),
- GFP_KERNEL);
+ hwmon = devm_kzalloc(dev, sizeof(struct da9052_hwmon), GFP_KERNEL);
if (!hwmon)
return -ENOMEM;
- mutex_init(&hwmon->hwmon_lock);
- hwmon->da9052 = dev_get_drvdata(pdev->dev.parent);
-
platform_set_drvdata(pdev, hwmon);
- ret = sysfs_create_group(&pdev->dev.kobj, &da9052_attr_group);
- if (ret)
- goto err_mem;
+ mutex_init(&hwmon->hwmon_lock);
+ hwmon->da9052 = dev_get_drvdata(pdev->dev.parent);
- hwmon->class_device = hwmon_device_register(&pdev->dev);
- if (IS_ERR(hwmon->class_device)) {
- ret = PTR_ERR(hwmon->class_device);
- goto err_sysfs;
+ init_completion(&hwmon->tsidone);
+
+ hwmon->tsi_as_adc =
+ device_property_read_bool(pdev->dev.parent, "dlg,tsi-as-adc");
+
+ if (hwmon->tsi_as_adc) {
+ tsiref_uv = devm_regulator_get_enable_read_voltage(dev->parent,
+ "tsiref");
+ if (tsiref_uv < 0)
+ return dev_err_probe(dev, tsiref_uv,
+ "failed to get tsiref voltage\n");
+
+ /* convert from microvolt (DT) to millivolt (hwmon) */
+ hwmon->tsiref_mv = tsiref_uv / 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);
+ return -ENXIO;
+ }
+
+ /* 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);
+ return err;
+ }
}
+ 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;
-err_sysfs:
- sysfs_remove_group(&pdev->dev.kobj, &da9052_attr_group);
-err_mem:
- return ret;
+exit_irq:
+ if (hwmon->tsi_as_adc)
+ da9052_free_irq(hwmon->da9052, DA9052_IRQ_TSIREADY, hwmon);
+
+ return err;
}
-static int da9052_hwmon_remove(struct platform_device *pdev)
+static void da9052_hwmon_remove(struct platform_device *pdev)
{
struct da9052_hwmon *hwmon = platform_get_drvdata(pdev);
- hwmon_device_unregister(hwmon->class_device);
- sysfs_remove_group(&pdev->dev.kobj, &da9052_attr_group);
-
- return 0;
+ if (hwmon->tsi_as_adc)
+ da9052_free_irq(hwmon->da9052, DA9052_IRQ_TSIREADY, hwmon);
}
static struct platform_driver da9052_hwmon_driver = {
@@ -318,7 +476,6 @@ static struct platform_driver da9052_hwmon_driver = {
.remove = da9052_hwmon_remove,
.driver = {
.name = "da9052-hwmon",
- .owner = THIS_MODULE,
},
};
generated by cgit (git 2.34.1) at 2025-12-25 15:15:01 +0000