// SPDX-License-Identifier: GPL-2.0-only
-/**
+/*
* ds2482.c - provides i2c to w1-master bridge(s)
* Copyright (C) 2005 Ben Gardner <bgardner@wabtec.com>
*
#include <linux/w1.h>
-/**
+/*
* Allow the active pullup to be disabled, default is enabled.
*
* Note from the DS2482 datasheet:
module_param(extra_config, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(extra_config, "Extra Configuration settings 1=APU,2=PPM,3=SPU,8=1WS");
-/**
+/*
* The DS2482 registers - there are 3 registers that are addressed by a read
* pointer. The read pointer is set by the last command executed.
*
#define DS2482_PTR_CODE_CHANNEL 0xD2 /* DS2482-800 only */
#define DS2482_PTR_CODE_CONFIG 0xC3
-/**
+/*
* Configure Register bit definitions
* The top 4 bits always read 0.
* To write, the top nibble must be the 1's compl. of the low nibble.
#define DS2482_REG_CFG_APU 0x01 /* active pull-up */
-/**
+/*
* Write and verify codes for the CHANNEL_SELECT command (DS2482-800 only).
* To set the channel, write the value at the index of the channel.
* Read and compare against the corresponding value to verify the change.
{ 0xB8, 0xB1, 0xAA, 0xA3, 0x9C, 0x95, 0x8E, 0x87 };
-/**
+/*
* Status Register bit definitions (read only)
*/
#define DS2482_REG_STS_DIR 0x80
/**
- * Helper to calculate values for configuration register
- * @param conf the raw config value
- * @return the value w/ complements that can be written to register
+ * ds2482_calculate_config - Helper to calculate values for configuration register
+ * @conf: the raw config value
+ * Return: the value w/ complements that can be written to register
*/
static inline u8 ds2482_calculate_config(u8 conf)
{
/**
- * Sets the read pointer.
- * @param pdev The ds2482 client pointer
- * @param read_ptr see DS2482_PTR_CODE_xxx above
- * @return -1 on failure, 0 on success
+ * ds2482_select_register - Sets the read pointer.
+ * @pdev: The ds2482 client pointer
+ * @read_ptr: see DS2482_PTR_CODE_xxx above
+ * Return: -1 on failure, 0 on success
*/
static inline int ds2482_select_register(struct ds2482_data *pdev, u8 read_ptr)
{
}
/**
- * Sends a command without a parameter
- * @param pdev The ds2482 client pointer
- * @param cmd DS2482_CMD_RESET,
+ * ds2482_send_cmd - Sends a command without a parameter
+ * @pdev: The ds2482 client pointer
+ * @cmd: DS2482_CMD_RESET,
* DS2482_CMD_1WIRE_RESET,
* DS2482_CMD_1WIRE_READ_BYTE
- * @return -1 on failure, 0 on success
+ * Return: -1 on failure, 0 on success
*/
static inline int ds2482_send_cmd(struct ds2482_data *pdev, u8 cmd)
{
}
/**
- * Sends a command with a parameter
- * @param pdev The ds2482 client pointer
- * @param cmd DS2482_CMD_WRITE_CONFIG,
+ * ds2482_send_cmd_data - Sends a command with a parameter
+ * @pdev: The ds2482 client pointer
+ * @cmd: DS2482_CMD_WRITE_CONFIG,
* DS2482_CMD_1WIRE_SINGLE_BIT,
* DS2482_CMD_1WIRE_WRITE_BYTE,
* DS2482_CMD_1WIRE_TRIPLET
- * @param byte The data to send
- * @return -1 on failure, 0 on success
+ * @byte: The data to send
+ * Return: -1 on failure, 0 on success
*/
static inline int ds2482_send_cmd_data(struct ds2482_data *pdev,
u8 cmd, u8 byte)
#define DS2482_WAIT_IDLE_TIMEOUT 100
/**
- * Waits until the 1-wire interface is idle (not busy)
+ * ds2482_wait_1wire_idle - Waits until the 1-wire interface is idle (not busy)
*
- * @param pdev Pointer to the device structure
- * @return the last value read from status or -1 (failure)
+ * @pdev: Pointer to the device structure
+ * Return: the last value read from status or -1 (failure)
*/
static int ds2482_wait_1wire_idle(struct ds2482_data *pdev)
{
}
/**
- * Selects a w1 channel.
+ * ds2482_set_channel - Selects a w1 channel.
* The 1-wire interface must be idle before calling this function.
*
- * @param pdev The ds2482 client pointer
- * @param channel 0-7
- * @return -1 (failure) or 0 (success)
+ * @pdev: The ds2482 client pointer
+ * @channel: 0-7
+ * Return: -1 (failure) or 0 (success)
*/
static int ds2482_set_channel(struct ds2482_data *pdev, u8 channel)
{
/**
- * Performs the touch-bit function, which writes a 0 or 1 and reads the level.
+ * ds2482_w1_touch_bit - Performs the touch-bit function, which writes a 0 or 1 and reads the level.
*
- * @param data The ds2482 channel pointer
- * @param bit The level to write: 0 or non-zero
- * @return The level read: 0 or 1
+ * @data: The ds2482 channel pointer
+ * @bit: The level to write: 0 or non-zero
+ * Return: The level read: 0 or 1
*/
static u8 ds2482_w1_touch_bit(void *data, u8 bit)
{
}
/**
- * Performs the triplet function, which reads two bits and writes a bit.
+ * ds2482_w1_triplet - Performs the triplet function, which reads two bits and writes a bit.
* The bit written is determined by the two reads:
* 00 => dbit, 01 => 0, 10 => 1
*
- * @param data The ds2482 channel pointer
- * @param dbit The direction to choose if both branches are valid
- * @return b0=read1 b1=read2 b3=bit written
+ * @data: The ds2482 channel pointer
+ * @dbit: The direction to choose if both branches are valid
+ * Return: b0=read1 b1=read2 b3=bit written
*/
static u8 ds2482_w1_triplet(void *data, u8 dbit)
{
}
/**
- * Performs the write byte function.
+ * ds2482_w1_write_byte - Performs the write byte function.
*
- * @param data The ds2482 channel pointer
- * @param byte The value to write
+ * @data: The ds2482 channel pointer
+ * @byte: The value to write
*/
static void ds2482_w1_write_byte(void *data, u8 byte)
{
}
/**
- * Performs the read byte function.
+ * ds2482_w1_read_byte - Performs the read byte function.
*
- * @param data The ds2482 channel pointer
- * @return The value read
+ * @data: The ds2482 channel pointer
+ * Return: The value read
*/
static u8 ds2482_w1_read_byte(void *data)
{
/**
- * Sends a reset on the 1-wire interface
+ * ds2482_w1_reset_bus - Sends a reset on the 1-wire interface
*
- * @param data The ds2482 channel pointer
- * @return 0=Device present, 1=No device present or error
+ * @data: The ds2482 channel pointer
+ * Return: 0=Device present, 1=No device present or error
*/
static u8 ds2482_w1_reset_bus(void *data)
{
return 0;
}
-/**
+/*
* Driver data (common to all clients)
*/
static const struct i2c_device_id ds2482_id[] = {
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