Messages in this thread Patch in this message | | | From | Naga Sureshkumar Relli <> | Subject | [LINUX PATCH v9 1/4] Devicetree: Add pl353 smc controller devicetree binding information | Date | Wed, 6 Jun 2018 13:19:39 +0530 |
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Add pl353 static memory controller devicetree binding information.
Signed-off-by: Naga Sureshkumar Relli <naga.sureshkumar.relli@xilinx.com> --- Changes in v9: - Addressed commens given by Randy Dunlap and Miquel Raynal Changes in v8: - None Changes in v7: - Corrected clocks description - prefixed '#' for address and size cells Changes in v6: - None Changes in v5: - Removed timing properties Changes in v4: - none Changes in v3: - none Changes in v2: - modified timing binding info as per onfi timing parameters - add suffix nano second as timing unit - modified the clock names as per the IP spec --- .../bindings/memory-controllers/pl353-smc.txt | 53 ++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 Documentation/devicetree/bindings/memory-controllers/pl353-smc.txt
diff --git a/Documentation/devicetree/bindings/memory-controllers/pl353-smc.txt b/Documentation/devicetree/bindings/memory-controllers/pl353-smc.txt new file mode 100644 index 0000000..551e66b --- /dev/null +++ b/Documentation/devicetree/bindings/memory-controllers/pl353-smc.txt @@ -0,0 +1,53 @@ +Device tree bindings for ARM PL353 static memory controller + +PL353 static memory controller supports two kinds of memory +interfaces.i.e NAND and SRAM/NOR interfaces. +The actual devices are instantiated from the child nodes of pl353 smc node. + +Required properties: +- compatible : Should be "arm,pl353-smc-r2p1" +- reg : Controller registers map and length. +- clock-names : List of input clock names - "ref_clk", "aper_clk" + (See clock bindings for details). +- clocks : Clock phandles (see clock bindings for details). +- address-cells : Address cells, must be 1. +- size-cells : Size cells. Must be 1. + +Child nodes: + For NAND the "arm,pl353-nand-r2p1" and for NOR the "cfi-flash" drivers are +supported as child nodes. + +Mandatory timing properties for child nodes: +- arm,nand-cycle-t0 : Read cycle time(t_rc). +- arm,nand-cycle-t1 : Write cycle time(t_wc). +- arm,nand-cycle-t2 : re_n assertion delay(t_rea). +- arm,nand-cycle-t3 : we_n de-assertion delay(t_wp). +- arm,nand-cycle-t4 : Status read time(t_clr) +- arm,nand-cycle-t5 : ID read time(t_ar) +- arm,nand-cycle-t6 : busy to re_n(t_rr) + +for nand partition information please refer the below file +Documentation/devicetree/bindings/mtd/partition.txt + +Example: + pl353smcc_0: pl353smcc@e000e000 { + compatible = "arm,pl353-smc-r2p1" + clock-names = "memclk", "aclk"; + clocks = <&clkc 11>, <&clkc 44>; + reg = <0xe000e000 0x1000>; + #address-cells = <1>; + #size-cells = <1>; + ranges; + nand_0: nand@e1000000 { + compatible = "arm,pl353-nand-r2p1" + reg = <0xe1000000 0x1000000>; + arm,nand-cycle-t0 = <0x4>; + arm,nand-cycle-t1 = <0x4>; + arm,nand-cycle-t2 = <0x1>; + arm,nand-cycle-t3 = <0x2>; + arm,nand-cycle-t4 = <0x2>; + arm,nand-cycle-t5 = <0x2>; + arm,nand-cycle-t6 = <0x4>; + (...) + }; + }; -- 2.7.4
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