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spi: sh-msiof: Add slave mode support

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Add slave mode support to the MSIOF driver, in both PIO and DMA mode.

For now this only supports the transmission of messages with a size
that is known in advance.

Signed-off-by: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com>
Signed-off-by: Hiromitsu Yamasaki <hiromitsu.yamasaki.ym@renesas.com>
[geert: Timeout handling cleanup, spi core integration, cancellation,
	rewording]
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Hisashi Nakamura
2017-05-22 15:11:43 +02:00
committed by Mark Brown
parent aa2ea9115b
commit cf9e4784f3
3 changed files with 88 additions and 35 deletions
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6
include/linux/spi/sh_msiof.h
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@@ -1,10 +1,16 @@
#ifndef __SPI_SH_MSIOF_H__
#define __SPI_SH_MSIOF_H__
enum {
MSIOF_SPI_MASTER,
MSIOF_SPI_SLAVE,
};
struct sh_msiof_spi_info {
int tx_fifo_override;
int rx_fifo_override;
u16 num_chipselect;
int mode;
unsigned int dma_tx_id;
unsigned int dma_rx_id;
u32 dtdl;