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author | Andrew Ruder <andrew.ruder@elecsyscorp.com> | 2014-04-24 13:39:32 -0500 |
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committer | Jagannadha Sutradharudu Teki <jaganna@xilinx.com> | 2014-06-08 23:12:27 +0530 |
commit | c1c0dd2644d6bdd64f5d36528d801d14832f6394 (patch) | |
tree | e00eeb8db9318ad294b18f9349a5fe60539d0975 /drivers/spi/sh_spi.h | |
parent | 04728086088e2dcc37ae0512a521246b21389838 (diff) | |
download | u-boot-imx-c1c0dd2644d6bdd64f5d36528d801d14832f6394.zip u-boot-imx-c1c0dd2644d6bdd64f5d36528d801d14832f6394.tar.gz u-boot-imx-c1c0dd2644d6bdd64f5d36528d801d14832f6394.tar.bz2 |
spi: soft_spi: Support NULL din/dout buffers
This mirrors the conventions used in other SPI drivers (kirkwood,
davinci, atmel, et al) where the din/dout buffer can be NULL when the
received/transmitted data isn't important. This reduces the need for
allocating additional buffers when write-only/read-only functionality is
needed.
In the din == NULL case, the received data is simply not stored. In the
dout == NULL case, zeroes are transmitted.
Signed-off-by: Andrew Ruder <andrew.ruder@elecsyscorp.com>
Cc: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Reviewed-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Diffstat (limited to 'drivers/spi/sh_spi.h')
0 files changed, 0 insertions, 0 deletions