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[0/3] nvmem: qfprom: Avoid untouchable regions

Message ID 20200929205807.2360405-1-evgreen@chromium.org
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Series nvmem: qfprom: Avoid untouchable regions | expand

Message

Evan Green Sept. 29, 2020, 8:58 p.m. UTC 
Certain fuses are protected by the XPU such that the AP cannot
access them. Attempting to do so causes an SError. Introduce an
SoC-specific compatible string, and then use that to determine
which fuse regions to present as Read as Zero / Write Ignore.


Evan Green (3):
  dt-bindings: nvmem: Add qcom,sc7180-qfprom compatible string
  arm64: dts: qcom: sc7180: Add soc-specific qfprom compat string
  nvmem: qfprom: Don't touch certain fuses

 .../bindings/nvmem/qcom,qfprom.yaml           |  4 +-
 arch/arm64/boot/dts/qcom/sc7180.dtsi          |  2 +-
 drivers/nvmem/qfprom.c                        | 55 +++++++++++++++++--
 3 files changed, 55 insertions(+), 6 deletions(-)

Comments

Doug Anderson Oct. 2, 2020, 10:24 p.m. UTC | #1 
Hi,

On Tue, Sep 29, 2020 at 1:58 PM Evan Green <evgreen@chromium.org> wrote:
>
> Add the soc-specific compatible string so that it can be matched
> more specifically now that the driver cares which SoC it's on.
>
> Signed-off-by: Evan Green <evgreen@chromium.org>
> ---
>
>  arch/arm64/boot/dts/qcom/sc7180.dtsi | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Reviewed-by: Douglas Anderson <dianders@chromium.org>