lkml.org 
[lkml]   [2019]   [Sep]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 3/3] dt-bindings: ddr: Add bindings for Samsung LPDDR3 memories
Date
Add description of bindings for Samsung k3qf2f20db LPDDR3 memory.
Minor fixes in the old documentation.

Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com>
---
.../devicetree/bindings/ddr/lpddr3.txt | 29 +++++++++++++++++--
1 file changed, 27 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/ddr/lpddr3.txt b/Documentation/devicetree/bindings/ddr/lpddr3.txt
index 3b2485b84b3f..de0905239767 100644
--- a/Documentation/devicetree/bindings/ddr/lpddr3.txt
+++ b/Documentation/devicetree/bindings/ddr/lpddr3.txt
@@ -40,10 +40,34 @@ Child nodes:
a given speed-bin. Please see Documentation/devicetree/
bindings/ddr/lpddr3-timings.txt for more information on "lpddr3-timings"

+Samsung K3QF2F20DB LPDDR3 memory
+------------------------------------------------------------
+
+This binding uses the LPDDR3 binding (described above)
+
+Required properties:
+- compatible: Should be:
+ "samsung,K3QF2F20DB"
+ followed by "jedec,lpddr3"
+- density : <u32> representing density in Mb (Mega bits)
+- io-width : <u32> representing bus width. Possible value 32
+- #address-cells: Must be set to 1
+- #size-cells: Must be set to 0
+
+Optional properties:
+
+The optional properties are the same as in the LPDDR3 generic bindings and
+values should be taken from the data-sheet. Detailed bindings are described
+above.
+
+Child nodes:
+
+Detailed bindings are described in LPDDR3 generic bindings described above.
+
Example:

samsung_K3QF2F20DB: lpddr3 {
- compatible = "Samsung,K3QF2F20DB", "jedec,lpddr3";
+ compatible = "samsung,K3QF2F20DB", "jedec,lpddr3";
density = <16384>;
io-width = <32>;
#address-cells = <1>;
@@ -73,7 +97,8 @@ 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
\
 
 \ /
  Last update: 2019-09-06 12:14    [W:0.057 / U:9.448 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site