68f9abd8cf
WCD audio codecs contain SPI slave hardware module to provide access to codec memory and SPI register space. Change adds driver for this slave hardware. This driver uses regmap for SPI internal register accesses and plugs in to standard SPI framework as child device to master controller driver. CRs-Fixed: 1049012 Change-Id: I0640ac1ed60a2ec3633636760593211ecd2f9c2d Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>
57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
/*
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* Copyright (c) 2016, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only 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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#ifndef __WCD_SPI_H__
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#define __WCD_SPI_H__
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struct wcd_spi_msg {
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/*
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* Caller's buffer pointer that holds data to
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* be transmitted in case of data_write and
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* data to be copied to in case of data_read.
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*/
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void *data;
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/* Length of data to write/read */
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size_t len;
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/*
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* Address in remote memory to write to
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* or read from.
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*/
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u32 remote_addr;
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/* Bitmask of flags, currently unused */
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u32 flags;
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};
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#ifdef CONFIG_SND_SOC_WCD_SPI
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int wcd_spi_data_write(struct spi_device *spi, struct wcd_spi_msg *msg);
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int wcd_spi_data_read(struct spi_device *spi, struct wcd_spi_msg *msg);
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#else
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int wcd_spi_data_write(struct spi_device *spi, struct wcd_spi_msg *msg)
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{
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return -ENODEV;
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}
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int wcd_spi_data_read(struct spi_device *spi, struct wcd_spi_msg *msg)
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{
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return -ENODEV;
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}
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#endif /* End of CONFIG_SND_SOC_WCD_SPI */
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#endif /* End of __WCD_SPI_H__ */
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