diff options
Diffstat (limited to 'dts/Bindings/fpga')
| -rw-r--r-- | dts/Bindings/fpga/altera-passive-serial.txt | 29 | ||||
| -rw-r--r-- | dts/Bindings/fpga/xilinx-pr-decoupler.txt | 36 | ||||
| -rw-r--r-- | dts/Bindings/fpga/xilinx-slave-serial.txt | 1 |
3 files changed, 65 insertions, 1 deletions
diff --git a/dts/Bindings/fpga/altera-passive-serial.txt b/dts/Bindings/fpga/altera-passive-serial.txt new file mode 100644 index 0000000000..48478bc07e --- /dev/null +++ b/dts/Bindings/fpga/altera-passive-serial.txt @@ -0,0 +1,29 @@ +Altera Passive Serial SPI FPGA Manager + +Altera 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: Must be one of the following: + "altr,fpga-passive-serial", + "altr,fpga-arria10-passive-serial" +- reg: SPI chip select of the FPGA +- nconfig-gpios: config pin (referred to as nCONFIG in the manual) +- nstat-gpios: status pin (referred to as nSTATUS in the manual) + +Optional properties: +- confd-gpios: confd pin (referred to as CONF_DONE in the manual) + +Example: + fpga: fpga@0 { + compatible = "altr,fpga-passive-serial"; + 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>; + }; diff --git a/dts/Bindings/fpga/xilinx-pr-decoupler.txt b/dts/Bindings/fpga/xilinx-pr-decoupler.txt new file mode 100644 index 0000000000..8dcfba926b --- /dev/null +++ b/dts/Bindings/fpga/xilinx-pr-decoupler.txt @@ -0,0 +1,36 @@ +Xilinx LogiCORE Partial Reconfig Decoupler Softcore + +The Xilinx LogiCORE Partial Reconfig Decoupler manages one or more +decouplers / fpga bridges. +The controller can decouple/disable the bridges which prevents signal +changes from passing through the bridge. The controller can also +couple / enable the bridges which allows traffic to pass through the +bridge normally. + +The Driver supports only MMIO handling. A PR region can have multiple +PR Decouplers which can be handled independently or chained via decouple/ +decouple_status signals. + +Required properties: +- compatible : Should contain "xlnx,pr-decoupler-1.00" followed by + "xlnx,pr-decoupler" +- regs : base address and size for decoupler module +- clocks : input clock to IP +- clock-names : should contain "aclk" + +Optional properties: +- bridge-enable : 0 if driver should disable bridge at startup + 1 if driver should enable bridge at startup + Default is to leave bridge in current state. + +See Documentation/devicetree/bindings/fpga/fpga-region.txt for generic bindings. + +Example: + fpga-bridge@100000450 { + compatible = "xlnx,pr-decoupler-1.00", + "xlnx-pr-decoupler"; + regs = <0x10000045 0x10>; + clocks = <&clkc 15>; + clock-names = "aclk"; + bridge-enable = <0>; + }; diff --git a/dts/Bindings/fpga/xilinx-slave-serial.txt b/dts/Bindings/fpga/xilinx-slave-serial.txt index 9766f7472f..cfa4ed42b6 100644 --- a/dts/Bindings/fpga/xilinx-slave-serial.txt +++ b/dts/Bindings/fpga/xilinx-slave-serial.txt @@ -31,7 +31,6 @@ Example for full FPGA configuration: cell-index = <1>; interrupts = <92>; clocks = <&coreclk 0>; - status = "okay"; fpga_mgr_spi: fpga-mgr@0 { compatible = "xlnx,fpga-slave-serial"; |