[v3,4/5] dt-bindings: mtd: Add bindings for TI's AM654 HyperBus memory controller

Commit Message

Vignesh Raghavendra April 23, 2019, 6:06 a.m. UTC

Add binding documentation for TI's HyperBus memory controller present on
AM654 SoC.

Signed-off-by: Vignesh Raghavendra <[e-mail]>
---
 .../devicetree/bindings/mtd/ti,am654-hbmc.txt | 31 +++++++++++++++++++
 MAINTAINERS                                   |  1 +
 2 files changed, 32 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt

Patch

diff --git a/Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt b/Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt
new file mode 100644
index 000000000000..00888482df25
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt
@@ -0,0 +1,31 @@ 
+Bindings for HyperBus Memory Controller (HBMC) on TI's K3 family of SoCs
+
+Required properties:
+- compatible : "ti,am654-hbmc" for AM654 SoC
+- reg : Two entries:
+	First entry pointed to the register space of HBMC controller
+	Second entry pointing to the memory map region dedicated for
+	MMIO access to attached flash devices
+- ranges : Address range allocated for each chipselect in the MMIO space
+
+Optional properties:
+- mux-controls: phandle to the multiplexer that controls selection of
+		HBMC vs OSPI. Mux state of 1 indicates HBMC is selected.
+
+Example:
+	hbmc: hbmc@47034000 {
+		compatible = "ti,am654-hbmc";
+		reg = <0x0 0x47034000 0x0 0x100>,
+			<0x5 0x00000000 0x1 0x0000000>;
+		power-domains = <&k3_pds 55>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0x0 0x5 0x00000000 0x4000000>, /* CS0 - 64MB */
+			 <0x1 0x5 0x04000000 0x4000000>; /* CS1 - 64MB
+
+		/* Slave flash node */
+		flash@0{
+			compatible = "cypress,hyperflash";
+			reg = <0x0 0x4000000>;
+		};
+	};
diff --git a/MAINTAINERS b/MAINTAINERS
index 7aa1b3454a89..07455035fca9 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7249,6 +7249,7 @@  S:	Supported
 F:	drivers/mtd/hyperbus/
 F:	include/linux/mtd/hyperbus.h
 F:	Documentation/devicetree/bindings/mtd/cypress,hyperbus.txt
+F:	Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt
 
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