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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 | ||
9 | struct device; | |
10 | struct regmap; | |
11 | struct 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 | */ | |
26 | struct ocelot_ddata { | |
27 | struct regmap *gcb_regmap; | |
28 | struct regmap *cpuorg_regmap; | |
29 | int spi_padding_bytes; | |
30 | void *dummy_buf; | |
31 | }; | |
32 | ||
33 | int ocelot_chip_reset(struct device *dev); | |
34 | int ocelot_core_init(struct device *dev); | |
35 | ||
36 | /* SPI-specific routines that won't be necessary for other interfaces */ | |
37 | struct 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 |