Adding upstream version 5.10.209.upstream/5.10.209

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 101 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/ddr/lpddr3.txt b/Documentation/devicetree/bindings/ddr/lpddr3.txt
new file mode 100644
index 000000000..a0eda35a8
--- /dev/null
+++ b/Documentation/devicetree/bindings/ddr/lpddr3.txt
@@ -0,0 +1,101 @@
+* LPDDR3 SDRAM memories compliant to JEDEC JESD209-3C
+
+Required properties:
+- compatible : Should be "<vendor>,<type>", and generic value "jedec,lpddr3".
+  Example "<vendor>,<type>" values:
+    "samsung,K3QF2F20DB"
+
+- density  : <u32> representing density in Mb (Mega bits)
+- io-width : <u32> representing bus width. Possible values are 8, 16, 32, 64
+- #address-cells: Must be set to 1
+- #size-cells: Must be set to 0
+
+Optional properties:
+
+The following optional properties represent the minimum value of some AC
+timing parameters of the DDR device in terms of number of clock cycles.
+These values shall be obtained from the device data-sheet.
+- tRFC-min-tck
+- tRRD-min-tck
+- tRPab-min-tck
+- tRPpb-min-tck
+- tRCD-min-tck
+- tRC-min-tck
+- tRAS-min-tck
+- tWTR-min-tck
+- tWR-min-tck
+- tRTP-min-tck
+- tW2W-C2C-min-tck
+- tR2R-C2C-min-tck
+- tWL-min-tck
+- tDQSCK-min-tck
+- tRL-min-tck
+- tFAW-min-tck
+- tXSR-min-tck
+- tXP-min-tck
+- tCKE-min-tck
+- tCKESR-min-tck
+- tMRD-min-tck
+
+Child nodes:
+- The lpddr3 node may have one or more child nodes of type "lpddr3-timings".
+  "lpddr3-timings" provides AC timing parameters of the device for
+  a given speed-bin. Please see Documentation/devicetree/
+  bindings/ddr/lpddr3-timings.txt for more information on "lpddr3-timings"
+
+Example:
+
+samsung_K3QF2F20DB: lpddr3 {
+	compatible	= "samsung,K3QF2F20DB", "jedec,lpddr3";
+	density		= <16384>;
+	io-width	= <32>;
+	#address-cells	= <1>;
+	#size-cells	= <0>;
+
+	tRFC-min-tck		= <17>;
+	tRRD-min-tck		= <2>;
+	tRPab-min-tck		= <2>;
+	tRPpb-min-tck		= <2>;
+	tRCD-min-tck		= <3>;
+	tRC-min-tck		= <6>;
+	tRAS-min-tck		= <5>;
+	tWTR-min-tck		= <2>;
+	tWR-min-tck		= <7>;
+	tRTP-min-tck		= <2>;
+	tW2W-C2C-min-tck	= <0>;
+	tR2R-C2C-min-tck	= <0>;
+	tWL-min-tck		= <8>;
+	tDQSCK-min-tck		= <5>;
+	tRL-min-tck		= <14>;
+	tFAW-min-tck		= <5>;
+	tXSR-min-tck		= <12>;
+	tXP-min-tck		= <2>;
+	tCKE-min-tck		= <2>;
+	tCKESR-min-tck		= <2>;
+	tMRD-min-tck		= <5>;
+
+	timings_samsung_K3QF2F20DB_800mhz: lpddr3-timings@800000000 {
+		compatible	= "jedec,lpddr3-timings";
+		/* workaround: 'reg' shows max-freq */
+		reg		= <800000000>;
+		min-freq	= <100000000>;
+		tRFC		= <65000>;
+		tRRD		= <6000>;
+		tRPab		= <12000>;
+		tRPpb		= <12000>;
+		tRCD		= <10000>;
+		tRC		= <33750>;
+		tRAS		= <23000>;
+		tWTR		= <3750>;
+		tWR		= <7500>;
+		tRTP		= <3750>;
+		tW2W-C2C	= <0>;
+		tR2R-C2C	= <0>;
+		tFAW		= <25000>;
+		tXSR		= <70000>;
+		tXP		= <3750>;
+		tCKE		= <3750>;
+		tCKESR		= <3750>;
+		tMRD		= <7000>;
+	};
+}