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Message-Id: <20190916100704.26692-4-l.luba@partner.samsung.com>
Date: Mon, 16 Sep 2019 12:07:04 +0200
From: Lukasz Luba <l.luba@...tner.samsung.com>
To: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-pm@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org
Cc: b.zolnierkie@...sung.com, krzk@...nel.org, kgene@...nel.org,
mark.rutland@....com, robh+dt@...nel.org, cw00.choi@...sung.com,
kyungmin.park@...sung.com, m.szyprowski@...sung.com,
s.nawrocki@...sung.com, myungjoo.ham@...sung.com,
willy.mh.wolff.ml@...il.com,
Lukasz Luba <l.luba@...tner.samsung.com>
Subject: [PATCH v2 3/3] dt-bindings: ddr: Add bindings for Samsung LPDDR3
memories
Add compatible for Samsung k3qf2f20db LPDDR3 memory bindings.
Introduce minor fixes in the old documentation.
Signed-off-by: Lukasz Luba <l.luba@...tner.samsung.com>
---
Documentation/devicetree/bindings/ddr/lpddr3.txt | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/Documentation/devicetree/bindings/ddr/lpddr3.txt b/Documentation/devicetree/bindings/ddr/lpddr3.txt
index 3b2485b84b3f..49afe794daaa 100644
--- a/Documentation/devicetree/bindings/ddr/lpddr3.txt
+++ b/Documentation/devicetree/bindings/ddr/lpddr3.txt
@@ -1,7 +1,9 @@
* LPDDR3 SDRAM memories compliant to JEDEC JESD209-3C
Required properties:
-- compatible : Should be - "jedec,lpddr3"
+- compatible : should be one of the following:
+ Generic default - "jedec,lpddr3".
+ For Samsung 542x SoC - "samsung,K3QF2F20DB", "jedec,lpddr3".
- 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 +45,7 @@ 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 +75,8 @@ samsung_K3QF2F20DB: lpddr3 {
timings_samsung_K3QF2F20DB_800mhz: lpddr3-timings@...000000 {
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
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