disable FB

hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/iio/dac/ad5593r.c
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@@ -1,10 +1,9 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * AD5593R Digital <-> Analog converters driver
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  *
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  * Copyright 2015-2016 Analog Devices Inc.
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  * Author: Paul Cercueil <paul.cercueil@analog.com>
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- *
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- * Licensed under the GPL-2.
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  */
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 #include "ad5592r-base.h"
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@@ -12,8 +11,9 @@
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 #include <linux/bitops.h>
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 #include <linux/i2c.h>
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 #include <linux/module.h>
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-#include <linux/of.h>
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-#include <linux/acpi.h>
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+#include <linux/mod_devicetable.h>
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+
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+#include <asm/unaligned.h>
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 #define AD5593R_MODE_CONF		(0 << 4)
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 #define AD5593R_MODE_DAC_WRITE		(1 << 4)
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@@ -21,6 +21,24 @@
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 #define AD5593R_MODE_DAC_READBACK	(5 << 4)
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 #define AD5593R_MODE_GPIO_READBACK	(6 << 4)
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 #define AD5593R_MODE_REG_READBACK	(7 << 4)
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+
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+static int ad5593r_read_word(struct i2c_client *i2c, u8 reg, u16 *value)
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+{
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+	int ret;
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+	u8 buf[2];
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+
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+	ret = i2c_smbus_write_byte(i2c, reg);
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+	if (ret < 0)
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+		return ret;
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+
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+	ret = i2c_master_recv(i2c, buf, sizeof(buf));
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+	if (ret < 0)
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+		return ret;
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+
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+	*value = get_unaligned_be16(buf);
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+
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+	return 0;
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+}
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 static int ad5593r_write_dac(struct ad5592r_state *st, unsigned chan, u16 value)
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 {
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@@ -40,13 +58,7 @@
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 	if (val < 0)
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 		return (int) val;
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-	val = i2c_smbus_read_word_swapped(i2c, AD5593R_MODE_ADC_READBACK);
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-	if (val < 0)
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-		return (int) val;
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-
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-	*value = (u16) val;
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-
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-	return 0;
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+	return ad5593r_read_word(i2c, AD5593R_MODE_ADC_READBACK, value);
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 }
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 static int ad5593r_reg_write(struct ad5592r_state *st, u8 reg, u16 value)
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@@ -60,25 +72,19 @@
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 static int ad5593r_reg_read(struct ad5592r_state *st, u8 reg, u16 *value)
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 {
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 	struct i2c_client *i2c = to_i2c_client(st->dev);
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-	s32 val;
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-	val = i2c_smbus_read_word_swapped(i2c, AD5593R_MODE_REG_READBACK | reg);
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-	if (val < 0)
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-		return (int) val;
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-
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-	*value = (u16) val;
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-
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-	return 0;
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+	return ad5593r_read_word(i2c, AD5593R_MODE_REG_READBACK | reg, value);
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 }
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 static int ad5593r_gpio_read(struct ad5592r_state *st, u8 *value)
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 {
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 	struct i2c_client *i2c = to_i2c_client(st->dev);
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-	s32 val;
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+	u16 val;
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+	int ret;
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-	val = i2c_smbus_read_word_swapped(i2c, AD5593R_MODE_GPIO_READBACK);
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-	if (val < 0)
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-		return (int) val;
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+	ret = ad5593r_read_word(i2c, AD5593R_MODE_GPIO_READBACK, &val);
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+	if (ret)
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+		return ret;
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 	*value = (u8) val;
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@@ -125,8 +131,8 @@
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 static struct i2c_driver ad5593r_driver = {
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 	.driver = {
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 		.name = "ad5593r",
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-		.of_match_table = of_match_ptr(ad5593r_of_match),
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-		.acpi_match_table = ACPI_PTR(ad5593r_acpi_match),
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+		.of_match_table = ad5593r_of_match,
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+		.acpi_match_table = ad5593r_acpi_match,
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 	},
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 	.probe = ad5593r_i2c_probe,
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 	.remove = ad5593r_i2c_remove,
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@@ -135,5 +141,5 @@
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 module_i2c_driver(ad5593r_driver);
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 MODULE_AUTHOR("Paul Cercueil <paul.cercueil@analog.com>");
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-MODULE_DESCRIPTION("Analog Devices AD5592R multi-channel converters");
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+MODULE_DESCRIPTION("Analog Devices AD5593R multi-channel converters");
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 MODULE_LICENSE("GPL v2");