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| author | Shaveta Leekha <shaveta@freescale.com> | 2014-04-24 14:51:23 +0530 |
|---|---|---|
| committer | Heiko Schocher <hs@denx.de> | 2014-04-29 07:10:58 +0200 |
| commit | a405764c1ec835a41ccda943b9156aee25e15d5e (patch) | |
| tree | 9a54a9bd16b888e3c6f95f30090afbb36133868e /board/sheldon/simpc8313/sdram.c | |
| parent | dec1861be90c948ea9fb771927d3d26a994d2e20 (diff) | |
drivers/i2c/fsl_i2c: modify i2c_read to handle multi-byte write
Most of the I2C slaves support accesses in the typical style
that is : read/write series of bytes at particular address offset.
These transactions look like:"
(1) START:Address:Tx:Offset:RESTART:Address[0..4]:Tx/Rx:data[0..n]:STOP"
However there are certain devices which support accesses in
terms of the transactions as follows:
(2) "START:Address:Tx:Txdata[0..n1]:Clock_stretching:
RESTART:Address:Rx:data[0..n2]"
Here Txdata is typically a command and some associated data,
similarly Rxdata could be command status plus some data received
as a response to the command sent.
Type (1) transactions are currently supportd in the
i2c driver using i2c_read and i2c_write APIs. I2C EEPROMs,
RTC, etc fall in this category.
To handle type (2) along with type (1) transactions,
i2c_read() function has been modified.
Signed-off-by: Shaveta Leekha <shaveta@freescale.com>
Signed-off-by: Poonam Aggrwal <poonam.aggrwal@freescale.com>
Diffstat (limited to 'board/sheldon/simpc8313/sdram.c')
0 files changed, 0 insertions, 0 deletions