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dmaengine: append hsu DMA driver

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The HSU DMA is developed to support High Speed UART controllers found in
particular on Intel MID platforms such as Intel Medfield.

The existing implementation is tighten to the drivers/tty/serial/mfd.c driver
and has a lot of disadvantages. Besides that we would like to get rid of the
old HS UART driver in regarding to extending the 8250 which supports generic
DMAEngine API. That's why the current driver has been developed.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2015-02-23 16:24:42 +02:00 • committed by Greg Kroah-Hartman
parent 84e0185efa
commit 2b49e0c567
9 changed files with 840 additions and 0 deletions
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25
include/linux/platform_data/dma-hsu.h Normal file
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/*
* Driver for the High Speed UART DMA
*
* Copyright (C) 2015 Intel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _PLATFORM_DATA_DMA_HSU_H
#define _PLATFORM_DATA_DMA_HSU_H
#include <linux/device.h>
struct hsu_dma_slave {
struct device *dma_dev;
int chan_id;
};
struct hsu_dma_platform_data {
unsigned short nr_channels;
};
#endif /* _PLATFORM_DATA_DMA_HSU_H */