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Diffstat (limited to 'drivers/iio/adc/qcom-spmi-vadc.c')
-rw-r--r--drivers/iio/adc/qcom-spmi-vadc.c104
1 files changed, 53 insertions, 51 deletions
diff --git a/drivers/iio/adc/qcom-spmi-vadc.c b/drivers/iio/adc/qcom-spmi-vadc.c
index 9e600bfd1765..00a7f0982025 100644
--- a/drivers/iio/adc/qcom-spmi-vadc.c
+++ b/drivers/iio/adc/qcom-spmi-vadc.c
@@ -1,35 +1,27 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
*/
#include <linux/bitops.h>
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/err.h>
+#include <linux/iio/adc/qcom-vadc-common.h>
#include <linux/iio/iio.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/math64.h>
#include <linux/module.h>
-#include <linux/of.h>
+#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>
+#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/log2.h>
#include <dt-bindings/iio/qcom,spmi-vadc.h>
-#include "qcom-vadc-common.h"
-
/* VADC register and bit definitions */
#define VADC_REVISION2 0x1
#define VADC_REVISION2_SUPPORTED_VADC 1
@@ -92,6 +84,7 @@
* that is an average of multiple measurements.
* @scale_fn_type: Represents the scaling function to convert voltage
* physical units desired by the client for the channel.
+ * @channel_name: Channel name used in device tree.
*/
struct vadc_channel_prop {
unsigned int channel;
@@ -101,6 +94,7 @@ struct vadc_channel_prop {
unsigned int hw_settle_time;
unsigned int avg_samples;
enum vadc_scale_fn_type scale_fn_type;
+ const char *channel_name;
};
/**
@@ -131,15 +125,15 @@ struct vadc_priv {
struct mutex lock;
};
-static const struct vadc_prescale_ratio vadc_prescale_ratios[] = {
- {.num = 1, .den = 1},
- {.num = 1, .den = 3},
- {.num = 1, .den = 4},
- {.num = 1, .den = 6},
- {.num = 1, .den = 20},
- {.num = 1, .den = 8},
- {.num = 10, .den = 81},
- {.num = 1, .den = 10}
+static const struct u32_fract vadc_prescale_ratios[] = {
+ { .numerator = 1, .denominator = 1 },
+ { .numerator = 1, .denominator = 3 },
+ { .numerator = 1, .denominator = 4 },
+ { .numerator = 1, .denominator = 6 },
+ { .numerator = 1, .denominator = 20 },
+ { .numerator = 1, .denominator = 8 },
+ { .numerator = 10, .denominator = 81 },
+ { .numerator = 1, .denominator = 10 },
};
static int vadc_read(struct vadc_priv *vadc, u16 offset, u8 *data)
@@ -413,13 +407,13 @@ err:
return ret;
}
-static int vadc_prescaling_from_dt(u32 num, u32 den)
+static int vadc_prescaling_from_dt(u32 numerator, u32 denominator)
{
unsigned int pre;
for (pre = 0; pre < ARRAY_SIZE(vadc_prescale_ratios); pre++)
- if (vadc_prescale_ratios[pre].num == num &&
- vadc_prescale_ratios[pre].den == den)
+ if (vadc_prescale_ratios[pre].numerator == numerator &&
+ vadc_prescale_ratios[pre].denominator == denominator)
break;
if (pre == ARRAY_SIZE(vadc_prescale_ratios))
@@ -490,8 +484,8 @@ static int vadc_read_raw(struct iio_dev *indio_dev,
return ret;
}
-static int vadc_of_xlate(struct iio_dev *indio_dev,
- const struct of_phandle_args *iiospec)
+static int vadc_fwnode_xlate(struct iio_dev *indio_dev,
+ const struct fwnode_reference_args *iiospec)
{
struct vadc_priv *vadc = iio_priv(indio_dev);
unsigned int i;
@@ -503,10 +497,19 @@ static int vadc_of_xlate(struct iio_dev *indio_dev,
return -EINVAL;
}
+static int vadc_read_label(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, char *label)
+{
+ struct vadc_priv *vadc = iio_priv(indio_dev);
+ const char *name = vadc->chan_props[chan->address].channel_name;
+
+ return sysfs_emit(label, "%s\n", name);
+}
+
static const struct iio_info vadc_info = {
.read_raw = vadc_read_raw,
- .of_xlate = vadc_of_xlate,
- .driver_module = THIS_MODULE,
+ .read_label = vadc_read_label,
+ .fwnode_xlate = vadc_fwnode_xlate,
};
struct vadc_channels {
@@ -607,7 +610,7 @@ static const struct vadc_channels vadc_chans[] = {
VADC_CHAN_NO_SCALE(P_MUX16_1_3, 1)
VADC_CHAN_NO_SCALE(LR_MUX1_BAT_THERM, 0)
- VADC_CHAN_NO_SCALE(LR_MUX2_BAT_ID, 0)
+ VADC_CHAN_VOLT(LR_MUX2_BAT_ID, 0, SCALE_DEFAULT)
VADC_CHAN_NO_SCALE(LR_MUX3_XO_THERM, 0)
VADC_CHAN_NO_SCALE(LR_MUX4_AMUX_THM1, 0)
VADC_CHAN_NO_SCALE(LR_MUX5_AMUX_THM2, 0)
@@ -657,15 +660,15 @@ static const struct vadc_channels vadc_chans[] = {
VADC_CHAN_NO_SCALE(LR_MUX3_BUF_PU1_PU2_XO_THERM, 0)
};
-static int vadc_get_dt_channel_data(struct device *dev,
+static int vadc_get_fw_channel_data(struct device *dev,
struct vadc_channel_prop *prop,
- struct device_node *node)
+ struct fwnode_handle *fwnode)
{
- const char *name = node->name;
+ const char *name = fwnode_get_name(fwnode), *label;
u32 chan, value, varr[2];
int ret;
- ret = of_property_read_u32(node, "reg", &chan);
+ ret = fwnode_property_read_u32(fwnode, "reg", &chan);
if (ret) {
dev_err(dev, "invalid channel number %s\n", name);
return ret;
@@ -676,10 +679,15 @@ static int vadc_get_dt_channel_data(struct device *dev,
return -EINVAL;
}
+ ret = fwnode_property_read_string(fwnode, "label", &label);
+ if (ret)
+ label = vadc_chans[chan].datasheet_name;
+ prop->channel_name = label;
+
/* the channel has DT description */
prop->channel = chan;
- ret = of_property_read_u32(node, "qcom,decimation", &value);
+ ret = fwnode_property_read_u32(fwnode, "qcom,decimation", &value);
if (!ret) {
ret = qcom_vadc_decimation_from_dt(value);
if (ret < 0) {
@@ -692,7 +700,7 @@ static int vadc_get_dt_channel_data(struct device *dev,
prop->decimation = VADC_DEF_DECIMATION;
}
- ret = of_property_read_u32_array(node, "qcom,pre-scaling", varr, 2);
+ ret = fwnode_property_read_u32_array(fwnode, "qcom,pre-scaling", varr, 2);
if (!ret) {
ret = vadc_prescaling_from_dt(varr[0], varr[1]);
if (ret < 0) {
@@ -705,7 +713,7 @@ static int vadc_get_dt_channel_data(struct device *dev,
prop->prescale = vadc_chans[prop->channel].prescale_index;
}
- ret = of_property_read_u32(node, "qcom,hw-settle-time", &value);
+ ret = fwnode_property_read_u32(fwnode, "qcom,hw-settle-time", &value);
if (!ret) {
ret = vadc_hw_settle_time_from_dt(value);
if (ret < 0) {
@@ -718,7 +726,7 @@ static int vadc_get_dt_channel_data(struct device *dev,
prop->hw_settle_time = VADC_DEF_HW_SETTLE_TIME;
}
- ret = of_property_read_u32(node, "qcom,avg-samples", &value);
+ ret = fwnode_property_read_u32(fwnode, "qcom,avg-samples", &value);
if (!ret) {
ret = vadc_avg_samples_from_dt(value);
if (ret < 0) {
@@ -731,7 +739,7 @@ static int vadc_get_dt_channel_data(struct device *dev,
prop->avg_samples = VADC_DEF_AVG_SAMPLES;
}
- if (of_property_read_bool(node, "qcom,ratiometric"))
+ if (fwnode_property_read_bool(fwnode, "qcom,ratiometric"))
prop->calibration = VADC_CALIB_RATIOMETRIC;
else
prop->calibration = VADC_CALIB_ABSOLUTE;
@@ -741,16 +749,15 @@ static int vadc_get_dt_channel_data(struct device *dev,
return 0;
}
-static int vadc_get_dt_data(struct vadc_priv *vadc, struct device_node *node)
+static int vadc_get_fw_data(struct vadc_priv *vadc)
{
const struct vadc_channels *vadc_chan;
struct iio_chan_spec *iio_chan;
struct vadc_channel_prop prop;
- struct device_node *child;
unsigned int index = 0;
int ret;
- vadc->nchannels = of_get_available_child_count(node);
+ vadc->nchannels = device_get_child_node_count(vadc->dev);
if (!vadc->nchannels)
return -EINVAL;
@@ -766,12 +773,10 @@ static int vadc_get_dt_data(struct vadc_priv *vadc, struct device_node *node)
iio_chan = vadc->iio_chans;
- for_each_available_child_of_node(node, child) {
- ret = vadc_get_dt_channel_data(vadc->dev, &prop, child);
- if (ret) {
- of_node_put(child);
+ device_for_each_child_node_scoped(vadc->dev, child) {
+ ret = vadc_get_fw_channel_data(vadc->dev, &prop, child);
+ if (ret)
return ret;
- }
prop.scale_fn_type = vadc_chans[prop.channel].scale_fn_type;
vadc->chan_props[index] = prop;
@@ -858,7 +863,6 @@ static int vadc_check_revision(struct vadc_priv *vadc)
static int vadc_probe(struct platform_device *pdev)
{
- struct device_node *node = pdev->dev.of_node;
struct device *dev = &pdev->dev;
struct iio_dev *indio_dev;
struct vadc_priv *vadc;
@@ -870,7 +874,7 @@ static int vadc_probe(struct platform_device *pdev)
if (!regmap)
return -ENODEV;
- ret = of_property_read_u32(node, "reg", &reg);
+ ret = device_property_read_u32(dev, "reg", &reg);
if (ret < 0)
return ret;
@@ -890,7 +894,7 @@ static int vadc_probe(struct platform_device *pdev)
if (ret)
return ret;
- ret = vadc_get_dt_data(vadc, node);
+ ret = vadc_get_fw_data(vadc);
if (ret)
return ret;
@@ -916,8 +920,6 @@ static int vadc_probe(struct platform_device *pdev)
if (ret)
return ret;
- indio_dev->dev.parent = dev;
- indio_dev->dev.of_node = node;
indio_dev->name = pdev->name;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->info = &vadc_info;
generated by cgit (git 2.34.1) at 2025-12-25 13:37:15 +0000