diff options
| author | Krishna Yarlagadda <kyarlagadda@nvidia.com> | 2016-02-08 16:47:35 +0530 |
|---|---|---|
| committer | Matthew Pedro <mapedro@nvidia.com> | 2016-08-24 09:13:22 -0700 |
| commit | 08590cd62f8b63776f54cb8ad1b2d329e45341e5 (patch) | |
| tree | 6cf0b3bc6df832a15a563c29705cee0e1c4ad6ce /Documentation | |
| parent | 64d410cfe6de23abfcc060de096f658a254fa870 (diff) | |
spi: tegra: option to boost register access
SPI register access for T210 and earlier chips depend
on SPI clock frequency. Provided an option to set SPI
clock at max frequency for register access.
Bug 1675625
Change-Id: Ie52c83cd4602604822462d9f02ddf31ead83aafc
Reviewed-on: http://git-master/r/1009782
(cherry picked from commit a2ccd28f2850538064668568432fee5d70a22e82)
Signed-off-by: Krishna Yarlagadda <kyarlagadda@nvidia.com>
Reviewed-on: http://git-master/r/1174581
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/spi/nvidia,spi-tegra114.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/spi/nvidia,spi-tegra114.txt b/Documentation/devicetree/bindings/spi/nvidia,spi-tegra114.txt index 2d961d8e3d69..04ed4dc8653c 100644 --- a/Documentation/devicetree/bindings/spi/nvidia,spi-tegra114.txt +++ b/Documentation/devicetree/bindings/spi/nvidia,spi-tegra114.txt @@ -12,6 +12,10 @@ Recommended properties: Documentation/devicetree/bindings/spi/spi-bus.txt Optional properties: - nvidia,clock-always-on: Enable clock of spi always. +- nvidia,boost-reg-access: In T210 and earlier chips SPI register access + is dependant on SPI clock frequency. Setting this option would + allow SPI clock frequency to be boosted. Benefitial when running + SPI at low frequencies with cpu based transfers. Default false. spi-client device controller properties: - nvidia,enable-hw-based-cs: (Boolean) Use the HW based CS if enabled. |