diff options
| author | Laxman Dewangan <ldewangan@nvidia.com> | 2011-03-23 16:48:09 +0530 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2011-04-26 15:54:22 -0700 |
| commit | 4571f236212393b16a0c55a813b62e6903bcc0da (patch) | |
| tree | 7764cd2455c53fd7e3a46666f56c5d93fde9eaaa /include/linux | |
| parent | 46f08752e1e90760d9cdea33dbb81c5576e459d9 (diff) | |
spi: tegra: Supporting HW based CS control
Supporting the hw based CS to communicate to spi device. This
provides the constraints in hold and setup time of CS before
clock start and clock ends.
The hw based CS can be selected if spi client provide the option
through the device controler data and only one transfer per
message is requested.
Original-Change-Id: I56d5e466361cb8b3710646e01494ddac46791ae4
Reviewed-on: http://git-master/r/23988
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
Tested-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: Amit Kamath <akamath@nvidia.com>
Reviewed-by: Ramachandrudu Kandhala <rkandhala@nvidia.com>
Change-Id: I52b1dcdefa199cd11ae7f838c61411a6268a2d32
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/spi-tegra.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/spi-tegra.h b/include/linux/spi-tegra.h index 2fe1af9c239e..3e0d26d51c50 100644 --- a/include/linux/spi-tegra.h +++ b/include/linux/spi-tegra.h @@ -26,4 +26,14 @@ struct tegra_spi_platform_data { int max_dma_buffer; bool is_clkon_always; }; + +/* Controller data from device to pass some info like + * hw based chip select can be used or not and if yes + * then CS hold and setup time. */ +struct tegra_spi_device_controller_data { + bool is_hw_based_cs; + int cs_setup_clk_count; + int cs_hold_clk_count; +}; + #endif /* _LINUX_SPI_TEGRA_H */ |