media: Remove ov_16bit_addr_reg_helpers.h

The helpers in this header are not used anywhere anymore,
they have been superseded by the new CCI register access helpers.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

include/media/ov_16bit_addr_reg_helpers.h

-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * I2C register access helpers for Omnivision OVxxxx image sensors which expect
- * a 16 bit register address in big-endian format and which have 1-3 byte
- * wide registers, in big-endian format (for the higher width registers).
- *
- * Based on the register helpers from drivers/media/i2c/ov2680.c which is:
- * Copyright (C) 2018 Linaro Ltd
- */
-#ifndef __OV_16BIT_ADDR_REG_HELPERS_H
-#define __OV_16BIT_ADDR_REG_HELPERS_H
-
-#include <asm/unaligned.h>
-#include <linux/dev_printk.h>
-#include <linux/i2c.h>
-
-static inline int ov_read_reg(struct i2c_client *client, u16 reg,
-				  unsigned int len, u32 *val)
-{
-	u8 addr_buf[2], data_buf[4] = { };
-	struct i2c_msg msgs[2];
-	int ret;
-
-	if (len > 4)
-		return -EINVAL;
-
-	put_unaligned_be16(reg, addr_buf);
-
-	msgs[0].addr = client->addr;
-	msgs[0].flags = 0;
-	msgs[0].len = ARRAY_SIZE(addr_buf);
-	msgs[0].buf = addr_buf;
-
-	msgs[1].addr = client->addr;
-	msgs[1].flags = I2C_M_RD;
-	msgs[1].len = len;
-	msgs[1].buf = &data_buf[4 - len];
-
-	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
-	if (ret != ARRAY_SIZE(msgs)) {
-		dev_err(&client->dev, "read error: reg=0x%4x: %d\n", reg, ret);
-		return -EIO;
-	}
-
-	*val = get_unaligned_be32(data_buf);
-
-	return 0;
-}
-
-#define ov_read_reg8(s, r, v)	ov_read_reg(s, r, 1, v)
-#define ov_read_reg16(s, r, v)	ov_read_reg(s, r, 2, v)
-#define ov_read_reg24(s, r, v)	ov_read_reg(s, r, 3, v)
-
-static inline int ov_write_reg(struct i2c_client *client, u16 reg,
-				   unsigned int len, u32 val)
-{
-	u8 buf[6];
-	int ret;
-
-	if (len > 4)
-		return -EINVAL;
-
-	put_unaligned_be16(reg, buf);
-	put_unaligned_be32(val << (8 * (4 - len)), buf + 2);
-	ret = i2c_master_send(client, buf, len + 2);
-	if (ret != len + 2) {
-		dev_err(&client->dev, "write error: reg=0x%4x: %d\n", reg, ret);
-		return -EIO;
-	}
-
-	return 0;
-}
-
-#define ov_write_reg8(s, r, v)	ov_write_reg(s, r, 1, v)
-#define ov_write_reg16(s, r, v)	ov_write_reg(s, r, 2, v)
-#define ov_write_reg24(s, r, v)	ov_write_reg(s, r, 3, v)
-
-static inline int ov_update_reg(struct i2c_client *client, u16 reg, u8 mask, u8 val)
-{
-	u32 readval;
-	int ret;
-
-	ret = ov_read_reg8(client, reg, &readval);
-	if (ret < 0)
-		return ret;
-
-	val = (readval & ~mask) | (val & mask);
-
-	return ov_write_reg8(client, reg, val);
-}
-
-#endif