summaryrefslogtreecommitdiff
path: root/drivers/spi/tegra114_spi.c
Commit message (Collapse)AuthorAgeLines
* Add more SPDX-License-Identifier tagsTom Rini2016-01-19-16/+1
| | | | | | | | | In a number of places we had wordings of the GPL (or LGPL in a few cases) license text that were split in such a way that it wasn't caught previously. Convert all of these to the correct SPDX-License-Identifier tag. Signed-off-by: Tom Rini <trini@konsulko.com>
* spi: tegra: Use GENMASKJagan Teki2015-10-27-6/+6
| | | | | | | | | Replace numeric mask hexcodes with GENMASK macro in tegra*.c Cc: Stephen Warren <swarren@wwwdotorg.org> Cc: Tom Warren <twarren@nvidia.com> Signed-off-by: Jagan Teki <jteki@openedev.com>
* spi: tegra: Use BIT macroJagan Teki2015-10-27-32/+32
| | | | | | | | | | | | | Replace numerical bit shift with BIT macro in tegra*.c :%s/(1 << nr)/BIT(nr)/g where nr = 0, 1, 2 .... 31 Cc: Stephen Warren <swarren@wwwdotorg.org> Cc: Tom Warren <twarren@nvidia.com> Reviewed-by: Tom Rini <trini@konsulko.com> Signed-off-by: Jagan Teki <jteki@openedev.com>
* dm: Use dev_get_addr() where possibleSimon Glass2015-08-31-1/+1
| | | | | | | | | | This is a convenient way for a driver to get the hardware address of a device, when regmap or syscon are not being used. Change existing callers to use it as an example to others. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Joe Hershberger <joe.hershberger@ni.com> Acked-by: Stephen Warren <swarren@wwwdotorg.org>
* tegra: spi: Support slow SPI ratesSimon Glass2015-06-09-3/+15
| | | | | | | | | Use the oscillator as the source clock when we cannot achieve a low-enough speed with the peripheral clock. This happens when we request 3MHz on a SPI clock, for example. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Warren <twarren@nvidia.com>
* tegra: spi: Drop the claim_bus() method to correct delaysSimon Glass2015-06-09-17/+9
| | | | | | | | | | | | | | | | At present the driver does not properly honour the requested SPI CS deactivation delay since the SPI bus is changed in the claim_bus() method. Everything the claim_bus() method does can be done when the device is probed (setting the speed and mode) and at the start of a new transfer (where the fifo_status is already cleared). So drop this method. Also, until the delay is complete, we should not touch the bus, so make sure that spi_cs_activate() is called before other things are done in the xfer() method. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Warren <twarren@nvidia.com>
* dm: spi: Correct SPI claim/release_bus() methodsSimon Glass2015-04-23-1/+2
| | | | | | | | | | | These methods should be passed a slave device, not a bus. This matches the old SPI interface. It is important to know which device is claiming the bus so passing a bus is not that useful. Reported-by: Haikun Wang <haikun.wang@freescale.com> Signed-off-by: Simon Glass <sjg@chromium.org> Tested-by: Peng Fan <Peng.Fan@freescale.com> Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
* dm: spi: Move the per-child data size to the uclassSimon Glass2015-01-29-1/+0
| | | | | | | | This is common to all SPI drivers and specifies a structure used by the uclass. It makes more sense to define it in the uclass. Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: tegra: spi: Convert to driver modelSimon Glass2014-10-22-120/+134
| | | | | | | | | | | | | | This converts the Tegra SPI drivers to use driver model. This is tested on: - Tegra20 - trimslice - Tegra30 - beaver - Tegra124 - dalmore (not tested on Tegra124) Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com> Signed-off-by: Simon Glass <sjg@chromium.org>
* spi: tegra: clear RDY bit prior to every transferYen Lin2013-12-19-13/+8
| | | | | | | | | | | | | | | | | | | | | | The RDY bit indicates that a transfer is complete. This needs to be cleared by SW before every single HW transaction, rather than only at the start of each SW transaction (those being made up of n HW transactions). It seems that earlier HW may have cleared this bit autonomously when starting a new transfer, and hence this code was not needed in practice. However, this is generally a good idea in all cases. In Tegra124, the HW behaviour appears to have changed, and SW must explicitly clear this bit. Otherwise, SW will believe that transfers have completed when they have not, and may e.g. read stale data from the RX FIFO. Signed-off-by: Yen Lin <yelin@nvidia.com> [swarren, rewrote commit description, unified duplicate RDY clearing code and moved it right before the start of the HW transaction, unconditionally exit loop after reading RX data, rather than checking if TX FIFO is empty, since it is guaranteed to be] Signed-off-by: Stephen Warren <swarren@nvidia.com> Reviewed-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
* spi: tegra114_spi: Convert to use spi_alloc_slave()Axel Lin2013-06-13-3/+1
| | | | | | Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Marek Vasut <marex@denx.de> Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
* tegra114: add SPI driverAllen Martin2013-03-25-0/+405
Add driver for tegra114 SPI controller. This controller is not compatible with either the tegra20 or tegra30 controllers, so it requires a new driver. Signed-off-by: Allen Martin <amartin@nvidia.com> Signed-off-by: Tom Warren <twarren@nvidia.com> Reviewed-by: Stephen Warren <swarren@nvidia.com>
generated by cgit v1.1 at 2024-11-02 12:36:19 +0000