| Message ID | 20210324010405.1917577-1-jwerner@chromium.org |
|---|---|
| State | Accepted, archived |
| Headers | show |
| Series | dt-bindings: ddr: Add optional manufacturer and revision ID to LPDDR3 | expand |
| Context | Check | Description |
|---|---|---|
| robh/checkpatch | success |
On Tue, 23 Mar 2021 18:04:05 -0700, Julius Werner wrote: > On some platforms, DDR parts are multi-sourced and the exact part number > used is not know to either kernel or firmware at build time. Firmware > can read identifying information from DDR mode registers at boot time > but needs a way to communicate this information to kernel and/or > userspace. This patch adds optional properties for this information to > the existing "jedec,lpddr3" device tree binding to be used for that > purpose. > > Signed-off-by: Julius Werner <jwerner@chromium.org> > --- > Documentation/devicetree/bindings/ddr/lpddr3.txt | 5 +++++ > 1 file changed, 5 insertions(+) > Applied, thanks!
diff --git a/Documentation/devicetree/bindings/ddr/lpddr3.txt b/Documentation/devicetree/bindings/ddr/lpddr3.txt index a0eda35a86eef9..b221e653d3845e 100644 --- a/Documentation/devicetree/bindings/ddr/lpddr3.txt +++ b/Documentation/devicetree/bindings/ddr/lpddr3.txt @@ -12,6 +12,9 @@ Required properties: Optional properties: +- manufacturer-id : <u32> Manufacturer ID value read from Mode Register 5 +- revision-id : <u32 u32> Revision IDs read from Mode Registers 6 and 7 + The following optional properties represent the minimum value of some AC timing parameters of the DDR device in terms of number of clock cycles. These values shall be obtained from the device data-sheet. @@ -49,6 +52,8 @@ samsung_K3QF2F20DB: lpddr3 { compatible = "samsung,K3QF2F20DB", "jedec,lpddr3"; density = <16384>; io-width = <32>; + manufacturer-id = <1>; + revision-id = <123 234>; #address-cells = <1>; #size-cells = <0>;
On some platforms, DDR parts are multi-sourced and the exact part number used is not know to either kernel or firmware at build time. Firmware can read identifying information from DDR mode registers at boot time but needs a way to communicate this information to kernel and/or userspace. This patch adds optional properties for this information to the existing "jedec,lpddr3" device tree binding to be used for that purpose. Signed-off-by: Julius Werner <jwerner@chromium.org> --- Documentation/devicetree/bindings/ddr/lpddr3.txt | 5 +++++ 1 file changed, 5 insertions(+)