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dm: sf: sandbox: Convert SPI flash driver to driver model

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Convert sandbox's spi flash emulation driver to use driver model.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
This commit is contained in:
Simon Glass
2014-10-13 23:42:08 -06:00
parent fbb099183e
commit b6c2956def
4 changed files with 291 additions and 60 deletions
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13
arch/sandbox/include/asm/spi.h
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@@ -32,19 +32,6 @@ struct sandbox_spi_emu_ops {
int (*xfer)(void *priv, const u8 *rx, u8 *tx, uint bytes);
};
/*
* There are times when the data lines are allowed to tristate. What
* is actually sensed on the line depends on the hardware. It could
* always be 0xFF/0x00 (if there are pull ups/downs), or things could
* float and so we'd get garbage back. This func encapsulates that
* scenario so we can worry about the details here.
*/
static inline void sandbox_spi_tristate(u8 *buf, uint len)
{
/* XXX: make this into a user config option ? */
memset(buf, 0xff, len);
}
/*
* 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