50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 OR MIT */
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/* Copyright 2021, 2022 Innovative Advantage Inc. */
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#ifndef _MFD_OCELOT_H
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#define _MFD_OCELOT_H
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#include <linux/kconfig.h>
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struct device;
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struct regmap;
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struct resource;
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/**
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* struct ocelot_ddata - Private data for an external Ocelot chip
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* @gcb_regmap: General Configuration Block regmap. Used for
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* operations like chip reset.
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* @cpuorg_regmap: CPU Device Origin Block regmap. Used for operations
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* like SPI bus configuration.
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* @spi_padding_bytes: Number of padding bytes that must be thrown out before
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* read data gets returned. This is calculated during
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* initialization based on bus speed.
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* @dummy_buf: Zero-filled buffer of spi_padding_bytes size. The dummy
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* bytes that will be sent out between the address and
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* data of a SPI read operation.
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*/
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struct ocelot_ddata {
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struct regmap *gcb_regmap;
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struct regmap *cpuorg_regmap;
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int spi_padding_bytes;
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void *dummy_buf;
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};
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int ocelot_chip_reset(struct device *dev);
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int ocelot_core_init(struct device *dev);
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/* SPI-specific routines that won't be necessary for other interfaces */
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struct regmap *ocelot_spi_init_regmap(struct device *dev,
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const struct resource *res);
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#define OCELOT_SPI_BYTE_ORDER_LE 0x00000000
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#define OCELOT_SPI_BYTE_ORDER_BE 0x81818181
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#ifdef __LITTLE_ENDIAN
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#define OCELOT_SPI_BYTE_ORDER OCELOT_SPI_BYTE_ORDER_LE
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#else
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#define OCELOT_SPI_BYTE_ORDER OCELOT_SPI_BYTE_ORDER_BE
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#endif
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#endif
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