1/* SPDX-License-Identifier: GPL-2.0 OR MIT */
2/* Copyright 2021, 2022 Innovative Advantage Inc. */
3
4#ifndef _MFD_OCELOT_H
5#define _MFD_OCELOT_H
6
7#include <linux/kconfig.h>
8
9struct device;
10struct regmap;
11struct resource;
12
13/**
14 * struct ocelot_ddata - Private data for an external Ocelot chip
15 * @gcb_regmap:		General Configuration Block regmap. Used for
16 *			operations like chip reset.
17 * @cpuorg_regmap:	CPU Device Origin Block regmap. Used for operations
18 *			like SPI bus configuration.
19 * @spi_padding_bytes:	Number of padding bytes that must be thrown out before
20 *			read data gets returned. This is calculated during
21 *			initialization based on bus speed.
22 * @dummy_buf:		Zero-filled buffer of spi_padding_bytes size. The dummy
23 *			bytes that will be sent out between the address and
24 *			data of a SPI read operation.
25 */
26struct ocelot_ddata {
27	struct regmap *gcb_regmap;
28	struct regmap *cpuorg_regmap;
29	int spi_padding_bytes;
30	void *dummy_buf;
31};
32
33int ocelot_chip_reset(struct device *dev);
34int ocelot_core_init(struct device *dev);
35
36/* SPI-specific routines that won't be necessary for other interfaces */
37struct regmap *ocelot_spi_init_regmap(struct device *dev,
38				      const struct resource *res);
39
40#define OCELOT_SPI_BYTE_ORDER_LE 0x00000000
41#define OCELOT_SPI_BYTE_ORDER_BE 0x81818181
42
43#ifdef __LITTLE_ENDIAN
44#define OCELOT_SPI_BYTE_ORDER OCELOT_SPI_BYTE_ORDER_LE
45#else
46#define OCELOT_SPI_BYTE_ORDER OCELOT_SPI_BYTE_ORDER_BE
47#endif
48
49#endif
50