linux/drivers/mfd/wm831x-otp.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * wm831x-otp.c  --  OTP for Wolfson WM831x PMICs
 *
 * Copyright 2009 Wolfson Microelectronics PLC.
 *
 * Author: Mark Brown <[email protected]>
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/bcd.h>
#include <linux/delay.h>
#include <linux/mfd/core.h>
#include <linux/random.h>

#include <linux/mfd/wm831x/core.h>
#include <linux/mfd/wm831x/otp.h>

/* In bytes */
#define WM831X_UNIQUE_ID_LEN …

/* Read the unique ID from the chip into id */
static int wm831x_unique_id_read(struct wm831x *wm831x, char *id)
{ … }

static ssize_t unique_id_show(struct device *dev,
			      struct device_attribute *attr, char *buf)
{ … }

static DEVICE_ATTR_RO(unique_id);

int wm831x_otp_init(struct wm831x *wm831x)
{ … }

void wm831x_otp_exit(struct wm831x *wm831x)
{ … }