dt-bindings: ddr: Add bindings for Samsung LPDDR3 memories

Add compatible for Samsung k3qf2f20db LPDDR3 memory bindings, based on
at25.txt compatible section.  Introduce minor fixes in the old
documentation.

Suggested-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

diff --git a/Documentation/devicetree/bindings/ddr/lpddr3.txt b/Documentation/devicetree/bindings/ddr/lpddr3.txt
index 3b2485b..a0eda35 100644 (file)
--- 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>;