Tegra spi slave driver for T124 and later chips.
Fix build error as
"'fpclk_name' may be used uninitialized".
Check and avoid divide by zero where clock rate
can be zero while selecting best clock.
SPI slave controller clock should be between 1.5 times to 4 times
of interface clock. Currently it is set to 4 times.
Change it to 3 times to avoid border cases where actual clock is not
same as what is requested.
Ex: master is set to .99MHz when 1MHz is requested and
slave is set to 4MHz as requested. Here above rule is violated.
SPI slave controller clock should be 1.5x of interface clock.
Change it to 2x to avoid border cases where actual clock set
is not same as what is requested.
Ex: master is set to 1MHz and slave is set to 1.48MHz instead
of 1.5MHz as requested. Here above rule is violated.
Set max buffer size to dma buffer size if dma init is
successful
Change based on below commits from linux-5.10
9de18723 spi: handle dma_slave_config error.
3a33b5fb spi: fix mem leak in spi slave driver
4b9b15ae drivers: Fix compile errors seen while merging 'v5.10-rc2'
Change based on below commits from linux-4.9
76a47a65 spi: tegra124-slave: tegra124 spi slave driver
2c341aa0 drivers: spi: fix -werror
b511c6f4 spi: tegra: Avoid divide by zero error
fdd18c3f spi: slave: Fix controller clock multiplier
829c57d6 spi: slave: Fix controller clock multiplier
85f8f7c2 spi: tegra: fix max buffer size
Bug 200021334
Bug 1899778
bug 1745660
Bug 200304626
Bug 200106113
Bug 200112595
bug 200054134
bug 1585361
Bug 200157229
bug 200116059
Bug 200063654
Bug 200045563
Bug 200084260
Bug 200141432
bug 200194538
bug 200129610
Bug 200319741
Coverity ID: 29578
Bug 200319815
Bug 200379969
Change-Id: Ibfadb40469f30b21350ed0fb7ee5daf96047197d
Signed-off-by: Vishwaroop A <va@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2888151
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
Add SPI Aurix protocol driver which communicates to the Aurix based on
SPI communication.
Currently, the hv_pm_ctrl APIs are implemented as dummy till
virtual HV driver is available.
Bug 3583584
Change-Id: I5b786b566cbf77f5627d518f8c98cb1fdd55dfa8
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2708696
GVS: Gerrit_Virtual_Submit
