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Signed-off-by: Naga Sureshkumar Relli --- Changes in v10: - Corrected the typos like "should be" to "Must be" and nand to NAND etc.. - Removed padding to describe size-cells and address-cells - Removed timing parameters from DT, and added ->setup_data_interface() hook to the driver to read the SDR timings - Modified label name from "pl353smcc_0: pl353smcc@e000e000" to "smcc: memory-controller@e000e000" as suggested by Miquel Changes in v9: - Addressed below comments given by Randy Dunlap and Miquel Raynal - Typos - Added extra documentation that explains the HW ECC limitation with SMC (Comments given to v8: https://lkml.org/lkml/2018/3/22/23) 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 | 41 ++++++++++++++++++++++ 1 file changed, 41 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..8b4c65e --- /dev/null +++ b/Documentation/devicetree/bindings/memory-controllers/pl353-smc.txt @@ -0,0 +1,41 @@ +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 : Must 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 : Must be 1. +- 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. + +for NAND partition information please refer the below file +Documentation/devicetree/bindings/mtd/partition.txt + +Example: + smcc: memory-controller@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: flash@e1000000 { + compatible = "arm,pl353-nand-r2p1" + reg = <0xe1000000 0x1000000>; + (...) + }; + nor0: flash@e2000000 { + compatible = "cfi-flash"; + reg = <0xe2000000 0x2000000>; + }; + };