From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- drivers/mfd/ocelot.h | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 drivers/mfd/ocelot.h (limited to 'drivers/mfd/ocelot.h') diff --git a/drivers/mfd/ocelot.h b/drivers/mfd/ocelot.h new file mode 100644 index 000000000..b8bc2f148 --- /dev/null +++ b/drivers/mfd/ocelot.h @@ -0,0 +1,49 @@ +/* SPDX-License-Identifier: GPL-2.0 OR MIT */ +/* Copyright 2021, 2022 Innovative Advantage Inc. */ + +#ifndef _MFD_OCELOT_H +#define _MFD_OCELOT_H + +#include + +struct device; +struct regmap; +struct resource; + +/** + * struct ocelot_ddata - Private data for an external Ocelot chip + * @gcb_regmap: General Configuration Block regmap. Used for + * operations like chip reset. + * @cpuorg_regmap: CPU Device Origin Block regmap. Used for operations + * like SPI bus configuration. + * @spi_padding_bytes: Number of padding bytes that must be thrown out before + * read data gets returned. This is calculated during + * initialization based on bus speed. + * @dummy_buf: Zero-filled buffer of spi_padding_bytes size. The dummy + * bytes that will be sent out between the address and + * data of a SPI read operation. + */ +struct ocelot_ddata { + struct regmap *gcb_regmap; + struct regmap *cpuorg_regmap; + int spi_padding_bytes; + void *dummy_buf; +}; + +int ocelot_chip_reset(struct device *dev); +int ocelot_core_init(struct device *dev); + +/* SPI-specific routines that won't be necessary for other interfaces */ +struct regmap *ocelot_spi_init_regmap(struct device *dev, + const struct resource *res); + +#define OCELOT_SPI_BYTE_ORDER_LE 0x00000000 +#define OCELOT_SPI_BYTE_ORDER_BE 0x81818181 + +#ifdef __LITTLE_ENDIAN +#define OCELOT_SPI_BYTE_ORDER OCELOT_SPI_BYTE_ORDER_LE +#else +#define OCELOT_SPI_BYTE_ORDER OCELOT_SPI_BYTE_ORDER_BE +#endif + +#endif -- cgit v1.2.3