mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-08 06:04:34 +00:00
5917d0b877
commit 49116e6d23 ("doc: arch: Convert README.sandbox to reST")
Moves README.sandbox to doc/arch.
Replace all the existing instances to point to the right documentation
file.
Signed-off-by: Keerthy <j-keerthy@ti.com>
45 lines
1.5 KiB
C
45 lines
1.5 KiB
C
/*
|
|
* Simulate a SPI port and clients (see doc/arch/sandbox.rst for details)
|
|
*
|
|
* Copyright (c) 2011-2013 The Chromium OS Authors.
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* Licensed under the GPL-2 or later.
|
|
*/
|
|
|
|
#ifndef __ASM_SPI_H__
|
|
#define __ASM_SPI_H__
|
|
|
|
#include <linux/types.h>
|
|
|
|
/*
|
|
* The interface between the SPI bus and the SPI client. The bus will
|
|
* instantiate a client, and that then call into it via these entry
|
|
* points. These should be enough for the client to emulate the SPI
|
|
* device just like the real hardware.
|
|
*/
|
|
struct sandbox_spi_emu_ops {
|
|
/* The bus wants to instantiate a new client, so setup everything */
|
|
int (*setup)(void **priv, const char *spec);
|
|
/* The bus is done with us, so break things down */
|
|
void (*free)(void *priv);
|
|
/* The CS has been "activated" -- we won't worry about low/high */
|
|
void (*cs_activate)(void *priv);
|
|
/* The CS has been "deactivated" -- we won't worry about low/high */
|
|
void (*cs_deactivate)(void *priv);
|
|
/* The client is rx-ing bytes from the bus, so it should tx some */
|
|
int (*xfer)(void *priv, const u8 *rx, u8 *tx, uint bytes);
|
|
};
|
|
|
|
/*
|
|
* Extract the bus/cs from the spi spec and return the start of the spi
|
|
* client spec. If the bus/cs are invalid for the current config, then
|
|
* it returns NULL.
|
|
*
|
|
* Example: arg="0:1:foo" will set bus to 0, cs to 1, and return "foo"
|
|
*/
|
|
const char *sandbox_spi_parse_spec(const char *arg, unsigned long *bus,
|
|
unsigned long *cs);
|
|
|
|
#endif
|