| Message ID | 910cf70128e0303d3642d6ff527a069ad6e18bf7.1485295905.git.stillcompiling@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tue, Jan 24, 2017 at 02:19:32PM -0800, Joshua Clayton wrote: > Describe a cyclone-ps-spi devicetree entry, required features > > Signed-off-by: Joshua Clayton <stillcompiling@gmail.com> > --- > .../bindings/fpga/altera-passive-serial.txt | 29 ++++++++++++++++++++++ > 1 file changed, 29 insertions(+) > create mode 100644 Documentation/devicetree/bindings/fpga/altera-passive-serial.txt This is a minor change, you could have kept my ack. Acked-by: Rob Herring <robh@kernel.org>
Thanks, Rob. On 01/27/2017 02:28 PM, Rob Herring wrote: > On Tue, Jan 24, 2017 at 02:19:32PM -0800, Joshua Clayton wrote: >> Describe a cyclone-ps-spi devicetree entry, required features >> >> Signed-off-by: Joshua Clayton <stillcompiling@gmail.com> >> --- >> .../bindings/fpga/altera-passive-serial.txt | 29 ++++++++++++++++++++++ >> 1 file changed, 29 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/fpga/altera-passive-serial.txt > This is a minor change, you could have kept my ack. > > Acked-by: Rob Herring <robh@kernel.org> I know you have a lot of these to wade through. I'll remember that going forward.
diff --git a/Documentation/devicetree/bindings/fpga/altera-passive-serial.txt b/Documentation/devicetree/bindings/fpga/altera-passive-serial.txt new file mode 100644 index 0000000..774e6a7 --- /dev/null +++ b/Documentation/devicetree/bindings/fpga/altera-passive-serial.txt @@ -0,0 +1,29 @@ +Altera Cyclone Passive Serial SPI FPGA Manager + +Altera Cyclone FPGAs support a method of loading the bitstream over what is +referred to as "passive serial". +The passive serial link is not technically spi, and might require extra +circuits in order to play nicely with other spi slaves on the same bus. + +See https://www.altera.com/literature/hb/cyc/cyc_c51013.pdf + +Required properties: +- compatible: should contain "altr,fpga-passive-serial" +- reg: spi chip select of the FPGA +- nconfig-gpios: config pin (referred to as nCONFIG in the cyclone manual) +- nstat-gpios: status pin (referred to as nSTATUS in the cyclone manual) + +Optional properties: +- confd-gpios: confd pin (referred to as CONF_DONE in the cyclone manual) + + + +Example: + fpga_spi: evi-fpga-spi@0 { + compatible = "altr,cyclone-ps-spi-fpga-mgr"; + spi-max-frequency = <20000000>; + reg = <0>; + nconfig-gpios = <&gpio4 9 GPIO_ACTIVE_LOW>; + nstat-gpios = <&gpio4 11 GPIO_ACTIVE_LOW>; + confd-gpios = <&gpio4 12 GPIO_ACTIVE_LOW>; + };
Describe a cyclone-ps-spi devicetree entry, required features Signed-off-by: Joshua Clayton <stillcompiling@gmail.com> --- .../bindings/fpga/altera-passive-serial.txt | 29 ++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 Documentation/devicetree/bindings/fpga/altera-passive-serial.txt