[PATCH 04/10] of: Add Tegra124 EMC bindings

[Tomeu Vizoso]

From: Mikko Perttunen <mperttunen@xxxxxxxxxx>

Add binding documentation for the nvidia,tegra124-emc device tree node.

Signed-off-by: Mikko Perttunen <mperttunen@xxxxxxxxxx>
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@xxxxxxxxxxxxx>
---
 .../bindings/memory-controllers/tegra-emc.txt      | 41 ++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/memory-controllers/tegra-emc.txt

diff --git a/Documentation/devicetree/bindings/memory-controllers/tegra-emc.txt b/Documentation/devicetree/bindings/memory-controllers/tegra-emc.txt
new file mode 100644
index 0000000..6282c6b
--- /dev/null
+++ b/Documentation/devicetree/bindings/memory-controllers/tegra-emc.txt
@@ -0,0 +1,41 @@
+Tegra124 SoC EMC controller
+
+Required properties :
+- compatible : "nvidia,tegra124-emc".
+- reg : Should contain 1 entry:
+  - EMC register set
+
+The node should contain a "timings@i" subnode for each supported RAM type
+  (see field RAM_CODE in register PMC_STRAPPING_OPT_A)
+Required properties for "timings@i" nodes :
+- nvidia,ram-code : Should contain the value of RAM_CODE this timing set
+  is used for.
+
+Each "timings@i" node should contain "timing@j" subnodes. One "timing@j"
+  node should exist for each supported EMC clock rate.
+Required properties for "timing@j" nodes :
+- clock-frequency : Should contain the memory clock rate.
+- nvidia,parent-clock-frequency : Should contain the rate of the EMC
+  clock's parent clock.
+- clocks : Must contain an entry for each entry in clock-names.
+  See ../clocks/clock-bindings.txt for details.
+- clock-names : Must include the following entries:
+  - emc-parent : EMC's parent clock.
+- The following properties contain EMC timing characterization values:
+  - nvidia,emc-zcal-cnt-long
+  - nvidia,emc-auto-cal-interval
+  - nvidia,emc-ctt-term-ctrl
+  - nvidia,emc-cfg
+  - nvidia,emc-cfg-2
+  - nvidia,emc-sel-dpd-ctrl
+  - nvidia,emc-cfg-dig-dll
+  - nvidia,emc-bgbias-ctl0
+  - nvidia,emc-auto-cal-config
+  - nvidia,emc-auto-cal-config2
+  - nvidia,emc-auto-cal-config3
+  - nvidia,emc-mode-reset
+  - nvidia,emc-mode-1
+  - nvidia,emc-mode-2
+  - nvidia,emc-mode-4
+- nvidia,emc-configuration : EMC timing characterization data written to
+                             EMC registers.
-- 
1.9.3

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