Re: [PATCH v4 1/2] dt-bindings: arm: qcom: Document the sc7280 CRD Pro boards

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 09/01/2023 23:00, Doug Anderson wrote:
Hi,

On Tue, Dec 20, 2022 at 9:12 AM Dmitry Baryshkov
<dmitry.baryshkov@xxxxxxxxxx> wrote:

On 20/12/2022 18:20, Rajendra Nayak wrote:


On 12/20/2022 8:00 PM, Matthias Kaehlcke wrote:
On Tue, Dec 20, 2022 at 10:30:32AM +0530, Rajendra Nayak wrote:

On 12/16/2022 7:49 PM, Matthias Kaehlcke wrote:
On Fri, Dec 16, 2022 at 04:59:17PM +0530, Rajendra Nayak wrote:
Add compatibles for the Pro SKU of the sc7280 CRD boards
which come with a Pro variant of the qcard.
The Pro qcard variant has smps9 from pm8350c ganged up with
smps7 and smps8.

Signed-off-by: Rajendra Nayak <quic_rjendra@xxxxxxxxxxx>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
Reviewed-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
---
v4 changes:
Added the zoglin-sku1536 compatible along with hoglin-sku1536.
Zoglin is same as the Hoglin variant, with the SPI Flash reduced
from 64MB to 8MB

    Documentation/devicetree/bindings/arm/qcom.yaml | 6 ++++++
    1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/qcom.yaml
b/Documentation/devicetree/bindings/arm/qcom.yaml
index 1b5ac6b02bc5..07771d4c91bd 100644
--- a/Documentation/devicetree/bindings/arm/qcom.yaml
+++ b/Documentation/devicetree/bindings/arm/qcom.yaml
@@ -558,6 +558,12 @@ properties:
              - const: google,hoglin
              - const: qcom,sc7280
+      - description: Qualcomm Technologies, Inc. sc7280 CRD Pro
platform (newest rev)
+        items:
+          - const: google,zoglin-sku1536
+          - const: google,hoglin-sku1536

Is there actually such a thing as a 'hoglin-sku1536', i.e. the Pro
qcard
with 64MB of SPI flash, or do they all have 8MB of flash?

The SPI flash is on the CRD mother-board and not on the qcards, so if
you replace
the qcards on the CRDs with 64MB flash you would need the
hoglin-sku1536 to
boot on those.

With such a configuration how does the bootloader know it should pass
the kernel
the device tree for 'hoglin-sku1536' (pro) and not the non-pro
variant? IIUC the
device tree is selected based on pin strappings on the mother-board,
not the
qcard.

The device tree is selected based on the pin strappings _and_ additional
logic
to dynamically identify modem/non-modem(wifi) as well as pro/non-pro
SKUs which
was added in the bootloaders.

Just to clarify things, when you mention pro SKU, is it a separate SoC
revision (like sc7280-pro vs bare sc7280), or is it a CRD revision (CRD
Pro vs bare CRD)?

I guess Rajendra never responded, but since I know the answer: it's a
different SoC revision. ...but the SoC in this case is on a daughter
card, so you could remove the daughter card containing the SoC and put
a new daughtercard on. That would have the effect of making an old CRD
revision have the new Pro SKU SoC.

So, this is a new SoC. Is it 100% compatible with the sc7280? In other words: does it require any additional customizations (in OPP tables, in frequences, speed bins, etc)?


Bjorn: I'd also note that I think this series (this patch and the next
one) are ready to land.

-Doug

--
With best wishes
Dmitry




[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [Linux for Sparc]     [IETF Annouce]     [Security]     [Bugtraq]     [Linux MIPS]     [ECOS]     [Asterisk Internet PBX]     [Linux API]

  Powered by Linux