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78f47b7353
Add a common interface to fdt based SPI drivers. Each driver is represented by a table entry in fdt_spi_drivers[]. If there are multiple SPI drivers in the table, the first driver to return success from spi_init() will be registered as the SPI driver. Signed-off-by: Allen Martin <amartin@nvidia.com> Signed-off-by: Tom Warren <twarren@nvidia.com> Reviewed-by: Stephen Warren <swarren@nvidia.com>
42 lines
1.5 KiB
C
42 lines
1.5 KiB
C
/*
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* NVIDIA Tegra20 SPI-FLASH controller
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*
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* Copyright 2010-2012 NVIDIA Corporation
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*
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* This software may be used and distributed according to the
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* terms of the GNU Public License, Version 2, incorporated
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* herein by reference.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* Version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef _TEGRA20_SPI_H_
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#define _TEGRA20_SPI_H_
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#include <asm/types.h>
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int tegra20_spi_cs_is_valid(unsigned int bus, unsigned int cs);
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struct spi_slave *tegra20_spi_setup_slave(unsigned int bus, unsigned int cs,
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unsigned int max_hz, unsigned int mode);
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void tegra20_spi_free_slave(struct spi_slave *slave);
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int tegra20_spi_init(int *node_list, int count);
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int tegra20_spi_claim_bus(struct spi_slave *slave);
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void tegra20_spi_cs_activate(struct spi_slave *slave);
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void tegra20_spi_cs_deactivate(struct spi_slave *slave);
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int tegra20_spi_xfer(struct spi_slave *slave, unsigned int bitlen,
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const void *data_out, void *data_in, unsigned long flags);
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#endif /* _TEGRA20_SPI_H_ */
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