| Message ID | 684ea151ba9aa2c6555a299daf56552ddc11f596.1496434383.git.stillcompiling@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Fri, Jun 2, 2017 at 3:30 PM, Joshua Clayton <stillcompiling@gmail.com> wrote: > From: Anatolij Gustschin <agust@denx.de> > > Add a flag that is passed to the write_init() callback, > indicating that the SPI bitstream starts with LSB first. > SPI controllers usually send data with MSB first. If an > FPGA expects bitstream data as LSB first, the data must > be reversed either by the SPI controller or by the driver. > > Alternatively the bitstream could be prepared as bit-reversed > to avoid the bit-swapping while sending. This flag indicates > such bit-reversed SPI bitstream. The low-level driver will > deal with the flag and perform bit-reversing if needed. > > Signed-off-by: Anatolij Gustschin <agust@denx.de> > Signed-off-by: Joshua Clayton <stillcompiling@gmail.com> Signed-off-by: Alan Tull <atull@kernel.org> > --- > > Changes from v11 (all in patch 4/4) > - Change "Altera V FPGA" to simply "Altera FPGA" > - Change the devicetree name to a generic "fpga: fpga@0" > from "fpga_spi: cyclonespi@0" > > include/linux/fpga/fpga-mgr.h | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/include/linux/fpga/fpga-mgr.h b/include/linux/fpga/fpga-mgr.h > index b4ac24c4411d..01c348ca38b7 100644 > --- a/include/linux/fpga/fpga-mgr.h > +++ b/include/linux/fpga/fpga-mgr.h > @@ -67,10 +67,12 @@ enum fpga_mgr_states { > * FPGA Manager flags > * FPGA_MGR_PARTIAL_RECONFIG: do partial reconfiguration if supported > * FPGA_MGR_EXTERNAL_CONFIG: FPGA has been configured prior to Linux booting > + * FPGA_MGR_BITSTREAM_LSB_FIRST: SPI bitstream bit order is LSB first > */ > #define FPGA_MGR_PARTIAL_RECONFIG BIT(0) > #define FPGA_MGR_EXTERNAL_CONFIG BIT(1) > #define FPGA_MGR_ENCRYPTED_BITSTREAM BIT(2) > +#define FPGA_MGR_BITSTREAM_LSB_FIRST BIT(3) > > /** > * struct fpga_image_info - information specific to a FPGA image > -- > 2.11.0 >
diff --git a/include/linux/fpga/fpga-mgr.h b/include/linux/fpga/fpga-mgr.h index b4ac24c4411d..01c348ca38b7 100644 --- a/include/linux/fpga/fpga-mgr.h +++ b/include/linux/fpga/fpga-mgr.h @@ -67,10 +67,12 @@ enum fpga_mgr_states { * FPGA Manager flags * FPGA_MGR_PARTIAL_RECONFIG: do partial reconfiguration if supported * FPGA_MGR_EXTERNAL_CONFIG: FPGA has been configured prior to Linux booting + * FPGA_MGR_BITSTREAM_LSB_FIRST: SPI bitstream bit order is LSB first */ #define FPGA_MGR_PARTIAL_RECONFIG BIT(0) #define FPGA_MGR_EXTERNAL_CONFIG BIT(1) #define FPGA_MGR_ENCRYPTED_BITSTREAM BIT(2) +#define FPGA_MGR_BITSTREAM_LSB_FIRST BIT(3) /** * struct fpga_image_info - information specific to a FPGA image