media: atomisp: Remove unused libmsrlisthelper

diff --git a/drivers/staging/media/atomisp/i2c/Kconfig b/drivers/staging/media/atomisp/i2c/Kconfig
index 8710c483015c..f5ab23592f29 100644
--- a/drivers/staging/media/atomisp/i2c/Kconfig
+++ b/drivers/staging/media/atomisp/i2c/Kconfig
@@ -27,16 +27,6 @@  config VIDEO_ATOMISP_GC2235
 
 	  It currently only works with the atomisp driver.
 
-config VIDEO_ATOMISP_MSRLIST_HELPER
-	tristate "Helper library to load, parse and apply large register lists."
-	depends on I2C
-	help
-	  This is a helper library to be used from a sensor driver to load, parse
-	  and apply large register lists.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called libmsrlisthelper.
-
 config VIDEO_ATOMISP_MT9M114
 	tristate "Aptina mt9m114 sensor support"
 	depends on ACPI
diff --git a/drivers/staging/media/atomisp/i2c/Makefile b/drivers/staging/media/atomisp/i2c/Makefile
index 3073cfa75ecf..021a7ea0a075 100644
--- a/drivers/staging/media/atomisp/i2c/Makefile
+++ b/drivers/staging/media/atomisp/i2c/Makefile
@@ -7,5 +7,3 @@  obj-$(CONFIG_VIDEO_ATOMISP_MT9M114)    += atomisp-mt9m114.o
 obj-$(CONFIG_VIDEO_ATOMISP_GC2235)     += atomisp-gc2235.o
 obj-$(CONFIG_VIDEO_ATOMISP_OV2722)     += atomisp-ov2722.o
 obj-$(CONFIG_VIDEO_ATOMISP_GC0310)     += atomisp-gc0310.o
-
-obj-$(CONFIG_VIDEO_ATOMISP_MSRLIST_HELPER) += atomisp-libmsrlisthelper.o
diff --git a/drivers/staging/media/atomisp/i2c/atomisp-libmsrlisthelper.c b/drivers/staging/media/atomisp/i2c/atomisp-libmsrlisthelper.c
deleted file mode 100644
index 3499353f8ea5..000000000000
--- a/drivers/staging/media/atomisp/i2c/atomisp-libmsrlisthelper.c
+++ /dev/null
@@ -1,211 +0,0 @@ 
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (c) 2013 Intel Corporation. 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 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/i2c.h>
-#include <linux/firmware.h>
-#include <linux/device.h>
-#include <linux/export.h>
-#include "../include/linux/libmsrlisthelper.h"
-#include <linux/module.h>
-#include <linux/slab.h>
-
-/* Tagged binary data container structure definitions. */
-struct tbd_header {
-	u32 tag;          /*!< Tag identifier, also checks endianness */
-	u32 size;         /*!< Container size including this header */
-	u32 version;      /*!< Version, format 0xYYMMDDVV */
-	u32 revision;     /*!< Revision, format 0xYYMMDDVV */
-	u32 config_bits;  /*!< Configuration flag bits set */
-	u32 checksum;     /*!< Global checksum, header included */
-} __packed;
-
-struct tbd_record_header {
-	u32 size;        /*!< Size of record including header */
-	u8 format_id;    /*!< tbd_format_t enumeration values used */
-	u8 packing_key;  /*!< Packing method; 0 = no packing */
-	u16 class_id;    /*!< tbd_class_t enumeration values used */
-} __packed;
-
-struct tbd_data_record_header {
-	u16 next_offset;
-	u16 flags;
-	u16 data_offset;
-	u16 data_size;
-} __packed;
-
-#define TBD_CLASS_DRV_ID 2
-
-static int set_msr_configuration(struct i2c_client *client, uint8_t *bufptr,
-				 unsigned int size)
-{
-	/*
-	 * The configuration data contains any number of sequences where
-	 * the first byte (that is, uint8_t) that marks the number of bytes
-	 * in the sequence to follow, is indeed followed by the indicated
-	 * number of bytes of actual data to be written to sensor.
-	 * By convention, the first two bytes of actual data should be
-	 * understood as an address in the sensor address space (hibyte
-	 * followed by lobyte) where the remaining data in the sequence
-	 * will be written.
-	 */
-
-	u8 *ptr = bufptr;
-
-	while (ptr < bufptr + size) {
-		struct i2c_msg msg = {
-			.addr = client->addr,
-			.flags = 0,
-		};
-		int ret;
-
-		/* How many bytes */
-		msg.len = *ptr++;
-		/* Where the bytes are located */
-		msg.buf = ptr;
-		ptr += msg.len;
-
-		if (ptr > bufptr + size)
-			/* Accessing data beyond bounds is not tolerated */
-			return -EINVAL;
-
-		ret = i2c_transfer(client->adapter, &msg, 1);
-		if (ret < 0) {
-			dev_err(&client->dev, "i2c write error: %d", ret);
-			return ret;
-		}
-	}
-	return 0;
-}
-
-static int parse_and_apply(struct i2c_client *client, uint8_t *buffer,
-			   unsigned int size)
-{
-	u8 *endptr8 = buffer + size;
-	struct tbd_data_record_header *header =
-	    (struct tbd_data_record_header *)buffer;
-
-	/* There may be any number of datasets present */
-	unsigned int dataset = 0;
-
-	do {
-		/* In below, four variables are read from buffer */
-		if ((uint8_t *)header + sizeof(*header) > endptr8)
-			return -EINVAL;
-
-		/* All data should be located within given buffer */
-		if ((uint8_t *)header + header->data_offset +
-		    header->data_size > endptr8)
-			return -EINVAL;
-
-		/* We have a new valid dataset */
-		dataset++;
-		/* See whether there is MSR data */
-		/* If yes, update the reg info */
-		if (header->data_size && (header->flags & 1)) {
-			int ret;
-
-			dev_info(&client->dev,
-				 "New MSR data for sensor driver (dataset %02d) size:%d\n",
-				 dataset, header->data_size);
-			ret = set_msr_configuration(client,
-						    buffer + header->data_offset,
-						    header->data_size);
-			if (ret)
-				return ret;
-		}
-		header = (struct tbd_data_record_header *)(buffer +
-			 header->next_offset);
-	} while (header->next_offset);
-
-	return 0;
-}
-
-int apply_msr_data(struct i2c_client *client, const struct firmware *fw)
-{
-	struct tbd_header *header;
-	struct tbd_record_header *record;
-
-	if (!fw) {
-		dev_warn(&client->dev, "Drv data is not loaded.\n");
-		return -EINVAL;
-	}
-
-	if (sizeof(*header) > fw->size)
-		return -EINVAL;
-
-	header = (struct tbd_header *)fw->data;
-	/* Check that we have drvb block. */
-	if (memcmp(&header->tag, "DRVB", 4))
-		return -EINVAL;
-
-	/* Check the size */
-	if (header->size != fw->size)
-		return -EINVAL;
-
-	if (sizeof(*header) + sizeof(*record) > fw->size)
-		return -EINVAL;
-
-	record = (struct tbd_record_header *)(header + 1);
-	/* Check that class id mathes tbd's drv id. */
-	if (record->class_id != TBD_CLASS_DRV_ID)
-		return -EINVAL;
-
-	/* Size 0 shall not be treated as an error */
-	if (!record->size)
-		return 0;
-
-	return parse_and_apply(client, (uint8_t *)(record + 1), record->size);
-}
-EXPORT_SYMBOL_GPL(apply_msr_data);
-
-int load_msr_list(struct i2c_client *client, char *name,
-		  const struct firmware **fw)
-{
-	int ret = request_firmware(fw, name, &client->dev);
-
-	if (ret) {
-		dev_err(&client->dev,
-			"Error %d while requesting firmware %s\n",
-			ret, name);
-		return ret;
-	}
-	dev_info(&client->dev, "Received %lu bytes drv data\n",
-		 (unsigned long)(*fw)->size);
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(load_msr_list);
-
-void release_msr_list(struct i2c_client *client, const struct firmware *fw)
-{
-	release_firmware(fw);
-}
-EXPORT_SYMBOL_GPL(release_msr_list);
-
-static int init_msrlisthelper(void)
-{
-	return 0;
-}
-
-static void exit_msrlisthelper(void)
-{
-}
-
-module_init(init_msrlisthelper);
-module_exit(exit_msrlisthelper);
-
-MODULE_AUTHOR("Jukka Kaartinen <jukka.o.kaartinen@intel.com>");
-MODULE_DESCRIPTION("Helper library to load, parse and apply large register lists");
-MODULE_LICENSE("GPL");
diff --git a/drivers/staging/media/atomisp/include/linux/libmsrlisthelper.h b/drivers/staging/media/atomisp/include/linux/libmsrlisthelper.h
deleted file mode 100644
index abc8fa809bce..000000000000
--- a/drivers/staging/media/atomisp/include/linux/libmsrlisthelper.h
+++ /dev/null
@@ -1,28 +0,0 @@ 
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Copyright (c) 2013 Intel Corporation. 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 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.
- *
- *
- */
-#ifndef __LIBMSRLISTHELPER_H__
-#define __LIBMSRLISTHELPER_H__
-
-struct i2c_client;
-struct firmware;
-
-int load_msr_list(struct i2c_client *client, char *path,
-		  const struct firmware **fw);
-int apply_msr_data(struct i2c_client *client, const struct firmware *fw);
-void release_msr_list(struct i2c_client *client,
-		      const struct firmware *fw);
-
-#endif /* ifndef __LIBMSRLISTHELPER_H__ */