[PATCH v3 2/2] dt-bindings: ddr: Add bindings for Samsung LPDDR3 memories
From: Lukasz Luba
Date: Thu Sep 19 2019 - 05:27:00 EST
Add compatible for Samsung k3qf2f20db LPDDR3 memory bindings.
Suggested to based on at25.txt compatible section.
Introduce minor fixes in the old documentation.
Suggested-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
Signed-off-by: Lukasz Luba <l.luba@xxxxxxxxxxxxxxxxxxx>
---
Documentation/devicetree/bindings/ddr/lpddr3.txt | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/Documentation/devicetree/bindings/ddr/lpddr3.txt b/Documentation/devicetree/bindings/ddr/lpddr3.txt
index 3b2485b84b3f..a0eda35a86ee 100644
--- a/Documentation/devicetree/bindings/ddr/lpddr3.txt
+++ b/Documentation/devicetree/bindings/ddr/lpddr3.txt
@@ -1,7 +1,10 @@
* LPDDR3 SDRAM memories compliant to JEDEC JESD209-3C
Required properties:
-- compatible : Should be - "jedec,lpddr3"
+- 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
@@ -43,7 +46,7 @@ Child nodes:
Example:
samsung_K3QF2F20DB: lpddr3 {
- compatible = "Samsung,K3QF2F20DB", "jedec,lpddr3";
+ compatible = "samsung,K3QF2F20DB", "jedec,lpddr3";
density = <16384>;
io-width = <32>;
#address-cells = <1>;
@@ -73,7 +76,8 @@ samsung_K3QF2F20DB: lpddr3 {
timings_samsung_K3QF2F20DB_800mhz: lpddr3-timings@800000000 {
compatible = "jedec,lpddr3-timings";
- reg = <800000000>; /* workaround: it shows max-freq */
+ /* workaround: 'reg' shows max-freq */
+ reg = <800000000>;
min-freq = <100000000>;
tRFC = <65000>;
tRRD = <6000>;
--
2.17.1