modify sin led gpio

hc

2024-05-13 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e

 kernel/drivers/iio/light/ltr501.c
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..
@@ -1,11 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * ltr501.c - Support for Lite-On LTR501 ambient light and proximity sensor
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  *
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  * Copyright 2014 Peter Meerwald <pmeerw@pmeerw.net>
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- *
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- * This file is subject to the terms and conditions of version 2 of
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- * the GNU General Public License.  See the file COPYING in the main
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- * directory of this archive for more details.
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  *
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  * 7-bit I2C slave address 0x23
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  *
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@@ -107,12 +104,12 @@
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 	int uscale;
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 };
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-static struct ltr501_gain ltr501_als_gain_tbl[] = {
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+static const struct ltr501_gain ltr501_als_gain_tbl[] = {
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 	{1, 0},
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 	{0, 5000},
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 };
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-static struct ltr501_gain ltr559_als_gain_tbl[] = {
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+static const struct ltr501_gain ltr559_als_gain_tbl[] = {
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 	{1, 0},
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 	{0, 500000},
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 	{0, 250000},
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@@ -123,14 +120,14 @@
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 	{0, 10000},
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 };
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-static struct ltr501_gain ltr501_ps_gain_tbl[] = {
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+static const struct ltr501_gain ltr501_ps_gain_tbl[] = {
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 	{1, 0},
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 	{0, 250000},
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 	{0, 125000},
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 	{0, 62500},
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 };
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-static struct ltr501_gain ltr559_ps_gain_tbl[] = {
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+static const struct ltr501_gain ltr559_ps_gain_tbl[] = {
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 	{0, 62500}, /* x16 gain */
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 	{0, 31250}, /* x32 gain */
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 	{0, 15625}, /* bits X1 are for x64 gain */
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@@ -139,9 +136,9 @@
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 struct ltr501_chip_info {
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 	u8 partid;
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-	struct ltr501_gain *als_gain;
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+	const struct ltr501_gain *als_gain;
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 	int als_gain_tbl_size;
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-	struct ltr501_gain *ps_gain;
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+	const struct ltr501_gain *ps_gain;
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 	int ps_gain_tbl_size;
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 	u8 als_mode_active;
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 	u8 als_gain_mask;
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@@ -198,7 +195,7 @@
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 	return -EINVAL;
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 }
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-static int ltr501_als_read_samp_freq(struct ltr501_data *data,
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+static int ltr501_als_read_samp_freq(const struct ltr501_data *data,
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 				     int *val, int *val2)
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 {
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 	int ret, i;
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@@ -216,7 +213,7 @@
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 	return IIO_VAL_INT_PLUS_MICRO;
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 }
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-static int ltr501_ps_read_samp_freq(struct ltr501_data *data,
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+static int ltr501_ps_read_samp_freq(const struct ltr501_data *data,
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 				    int *val, int *val2)
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 {
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 	int ret, i;
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@@ -272,7 +269,7 @@
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 	return ret;
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 }
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-static int ltr501_als_read_samp_period(struct ltr501_data *data, int *val)
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+static int ltr501_als_read_samp_period(const struct ltr501_data *data, int *val)
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 {
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 	int ret, i;
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@@ -288,7 +285,7 @@
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 	return IIO_VAL_INT;
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 }
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-static int ltr501_ps_read_samp_period(struct ltr501_data *data, int *val)
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+static int ltr501_ps_read_samp_period(const struct ltr501_data *data, int *val)
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 {
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 	int ret, i;
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@@ -327,7 +324,7 @@
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 	return lux / 1000;
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 }
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-static int ltr501_drdy(struct ltr501_data *data, u8 drdy_mask)
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+static int ltr501_drdy(const struct ltr501_data *data, u8 drdy_mask)
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 {
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 	int tries = 100;
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 	int ret, status;
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@@ -379,7 +376,8 @@
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 }
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 /* read int time in micro seconds */
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-static int ltr501_read_it_time(struct ltr501_data *data, int *val, int *val2)
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+static int ltr501_read_it_time(const struct ltr501_data *data,
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+			       int *val, int *val2)
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 {
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 	int ret, index;
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@@ -397,7 +395,7 @@
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 	return IIO_VAL_INT_PLUS_MICRO;
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 }
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-static int ltr501_read_als(struct ltr501_data *data, __le16 buf[2])
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+static int ltr501_read_als(const struct ltr501_data *data, __le16 buf[2])
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 {
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 	int ret;
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@@ -409,7 +407,7 @@
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 				buf, 2 * sizeof(__le16));
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 }
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-static int ltr501_read_ps(struct ltr501_data *data)
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+static int ltr501_read_ps(const struct ltr501_data *data)
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 {
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 	__le16 status;
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 	int ret;
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@@ -426,7 +424,7 @@
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 	return le16_to_cpu(status);
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 }
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-static int ltr501_read_intr_prst(struct ltr501_data *data,
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+static int ltr501_read_intr_prst(const struct ltr501_data *data,
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 				 enum iio_chan_type type,
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 				 int *val2)
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 {
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@@ -723,7 +721,7 @@
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 	return -EINVAL;
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 }
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-static int ltr501_get_gain_index(struct ltr501_gain *gain, int size,
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+static int ltr501_get_gain_index(const struct ltr501_gain *gain, int size,
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 				 int val, int val2)
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 {
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 	int i;
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@@ -855,14 +853,14 @@
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 	return ret;
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 }
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-static int ltr501_read_thresh(struct iio_dev *indio_dev,
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+static int ltr501_read_thresh(const struct iio_dev *indio_dev,
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 			      const struct iio_chan_spec *chan,
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 			      enum iio_event_type type,
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 			      enum iio_event_direction dir,
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 			      enum iio_event_info info,
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 			      int *val, int *val2)
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 {
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-	struct ltr501_data *data = iio_priv(indio_dev);
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+	const struct ltr501_data *data = iio_priv(indio_dev);
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 	int ret, thresh_data;
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 	switch (chan->type) {
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@@ -1273,7 +1271,7 @@
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 	if (mask & LTR501_STATUS_ALS_RDY) {
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 		ret = regmap_bulk_read(data->regmap, LTR501_ALS_DATA1,
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-				       (u8 *)als_buf, sizeof(als_buf));
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+				       als_buf, sizeof(als_buf));
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 		if (ret < 0)
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 			goto done;
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 		if (test_bit(0, indio_dev->active_scan_mask))
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@@ -1372,7 +1370,7 @@
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 	}
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 }
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-static struct regmap_config ltr501_regmap_config = {
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+static const struct regmap_config ltr501_regmap_config = {
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 	.name =  LTR501_REGMAP_NAME,
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 	.reg_bits = 8,
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 	.val_bits = 8,
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@@ -1492,7 +1490,6 @@
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 	if ((partid >> 4) != data->chip_info->partid)
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 		return -ENODEV;
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-	indio_dev->dev.parent = &client->dev;
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 	indio_dev->info = data->chip_info->info;
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 	indio_dev->channels = data->chip_info->channels;
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 	indio_dev->num_channels = data->chip_info->no_channels;