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cros_ec: spi: Add support for EC protocol version 3

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Protocol version 3 will be attempted first; if the EC doesn't support
it, u-boot will fall back to the old protocol version (2).

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Randall Spangler
2014-02-27 13:26:10 -07:00
committed by Simon Glass
parent 2d8ede58ca
commit a607028331
3 changed files with 49 additions and 0 deletions
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13
include/cros_ec.h
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@@ -311,6 +311,19 @@ int cros_ec_spi_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version,
const uint8_t *dout, int dout_len,
uint8_t **dinp, int din_len);
/**
* Send a packet to a CROS-EC device and return the response packet.
*
* Expects the request packet to be stored in dev->dout. Stores the response
* packet in dev->din.
*
* @param dev CROS-EC device
* @param out_bytes Size of request packet to output
* @param in_bytes Maximum size of response packet to receive
* @return number of bytes in response packet, or <0 on error
*/
int cros_ec_spi_packet(struct cros_ec_dev *dev, int out_bytes, int in_bytes);
/**
* Dump a block of data for a command.
*