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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>
This commit is contained in:
Lukasz Luba 2019-09-19 11:26:41 +02:00 committed by Krzysztof Kozlowski
parent 5cb4d9a02a
commit 296523d933
1 changed files with 7 additions and 3 deletions
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10
Documentation/devicetree/bindings/ddr/lpddr3.txt
View File

@ -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>;