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* spi: cadence_qspi: support FIFO width other than 4 bytesVikas Manocha2015-07-031-23/+23
| | | | | | | | | This patch makes the code compatible with FIFO depths other than 4 bytes. It also simplify read/write FIFO loops. Signed-off-by: Vikas Manocha <vikas.manocha@st.com> Tested-by: Stefan Roese <sr@denx.de> Reviewed-by: Jagannadh Teki <jteki@openedev.com>
* spi: cadence_qspi: get sram size from device treeVikas Manocha2015-07-031-5/+1
| | | | | | | | | sram size could be different on different socs, e.g. on stv0991 it is 256 while on altera platform it is 128. It is better to receive it from device tree. Signed-off-by: Vikas Manocha <vikas.manocha@st.com> Tested-by: Stefan Roese <sr@denx.de> Reviewed-by: Jagannadh Teki <jteki@openedev.com>
* spi: cadence_qspi: move the sram partition in initVikas Manocha2015-07-031-11/+5
| | | | | | | | | | There is no need to re-configure sram partition for every read/write for better full use of sram for read or write. This patch divides the half sram for read & half for write once at initialization. Signed-off-by: Vikas Manocha <vikas.manocha@st.com> Tested-by: Stefan Roese <sr@denx.de> Reviewed-by: Jagannadh Teki <jteki@openedev.com>
* spi: Add Cadence QSPI DM driver used by SoCFPGAStefan Roese2014-12-061-0/+898
This driver is cloned from the Altera Rockerboard.org U-Boot repository. I used this git tag: ACDS14.0.1_REL_GSRD_RC2. With Some modification to support the U-Boot driver model (DM). As mentioned above, in this new version I ported this driver to the new driver model (DM). One big advantage of this move is that now multiple SPI drivers can be enabled on one platform. And since the SoCFPGA also has the Designware SPI master controller integrated, this feature is really needed to support both controllers. Because of this, this series needs the DT support for SoCFPGA to be applied. For DT based probing in the SPI DM. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Chin Liang See <clsee@altera.com> Cc: Dinh Nguyen <dinguyen@altera.com> Cc: Vince Bridgers <vbridger@altera.com> Cc: Marek Vasut <marex@denx.de> Cc: Pavel Machek <pavel@denx.de> Cc: Simon Glass <sjg@chromium.org> Cc: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
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