[PATCH v4 4/5] dt-bindings: mtd: Add bindings for TI's AM654 HyperBus memory controller

Vignesh Raghavendra vigneshr at ti.com
Tue Apr 23 03:48:13 PDT 2019


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

Signed-off-by: Vignesh Raghavendra <vigneshr at ti.com>
---
 .../devicetree/bindings/mtd/ti,am654-hbmc.txt | 32 +++++++++++++++++++
 MAINTAINERS                                   |  1 +
 2 files changed, 33 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt

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..fc87c7918389
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt
@@ -0,0 +1,32 @@
+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 at 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 at 0 {
+			compatible = "cypress,hyperflash";
+			reg = <0x0 0x4000000>;
+		};
+	};
diff --git a/MAINTAINERS b/MAINTAINERS
index a5f22f85c848..1ade81f9a32a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7258,6 +7258,7 @@ S:	Supported
 F:	drivers/mtd/hyperbus/
 F:	include/linux/mtd/hyperbus.h
 F:	Documentation/devicetree/bindings/mtd/cypress,hyperflash.txt
+F:	Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt
 
 HYPERVISOR VIRTUAL CONSOLE DRIVER
 L:	linuxppc-dev at lists.ozlabs.org
-- 
2.21.0




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