[PATCH v2] arm64: dts: qcom: qcs6490-rb3gen2: Declare GCC clocks protected

From: Bjorn Andersson
Date: Fri Feb 09 2024 - 18:22:06 EST

The SC7280 GCC binding describes clocks which, due to the difference in
security model, are not accessible on the RB3gen2 - in the same way seen
on QCM6490.

Mark these clocks as protected, to allow the board to boot. In contrast
to the present QCM6490 boards GCC_EDP_CLKREF_EN is left out, as this
does not need to be "protected" and is used on the RB3Gen2 board.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Reviewed-by: Luca Weiss <luca.weiss@xxxxxxxxxxxxx>
Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
Signed-off-by: Bjorn Andersson <quic_bjorande@xxxxxxxxxxx>
I did notice Taniya's patch [1] after writing this patch. I'd prefer to
merge this minimal set asap, to make the board boot, unless there's a
strong argument for including those other clocks in the protected list.

[1] https://lore.kernel.org/linux-arm-msm/20240208062836.19767-6-quic_tdas@xxxxxxxxxxx/
Changes in v2:
- Dropped GCC_EDP_CLKREF_EN from the list and expanded the commit
message to cover this descrepancy from QCM6490 devices.
- Corrected SC7180 to SC7280 in commit message.
- Link to v1: https://lore.kernel.org/r/20240209-qcm6490-gcc-protected-clocks-v1-1-bd3487b2e7b1@xxxxxxxxxxx
arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts | 17 +++++++++++++++++
1 file changed, 17 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
index 8bb7d13d85f6..ebbe2c1123f6 100644
--- a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
+++ b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
@@ -413,6 +413,23 @@ vreg_bob_3p296: bob {

+&gcc {
+ protected-clocks = <GCC_CFG_NOC_LPASS_CLK>,
&qupv3_id_0 {
status = "okay";

base-commit: b1d3a0e70c3881d2f8cf6692ccf7c2a4fb2d030d
change-id: 20240209-qcm6490-gcc-protected-clocks-ee5fafdb76b3

Best regards,
Bjorn Andersson <quic_bjorande@xxxxxxxxxxx>