linux-kernel - [PATCH] arm64: defconfig: build-in Qualcomm SC7180 and SM8450 interconnects

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Date:   Thu, 20 Oct 2022 23:27:02 -0400
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH] arm64: defconfig: build-in Qualcomm SC7180 and SM8450 interconnects

On Qualcomm SC7180 and SM8450 SocS, the typical debug console serial
port is part of GENI Serial Engine QUP Wrapper Controller which uses
interconnects.  This means that without interconnect drivers, the serial
might not probe.  Without serial console, the root might not be mounted
by initramfs:

  + REASON=No init found. Try passing init= bootarg. PS1=(initramfs
  ...
  (initramfs) run-init -c /dev/console -n /root /sbin/init
  run-init: opening console: No such file or directory

This means that interconnect drivers on these Qualcomm SoCs cannot be
modules and must be built-in to mount rootfs.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
 arch/arm64/configs/defconfig | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 2af94d3c1c11..c1b7fb44e381 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -1301,7 +1301,7 @@ CONFIG_INTERCONNECT_QCOM_MSM8916=m
 CONFIG_INTERCONNECT_QCOM_MSM8996=m
 CONFIG_INTERCONNECT_QCOM_OSM_L3=m
 CONFIG_INTERCONNECT_QCOM_QCS404=m
-CONFIG_INTERCONNECT_QCOM_SC7180=m
+CONFIG_INTERCONNECT_QCOM_SC7180=y
 CONFIG_INTERCONNECT_QCOM_SC7280=y
 CONFIG_INTERCONNECT_QCOM_SC8180X=y
 CONFIG_INTERCONNECT_QCOM_SC8280XP=y
@@ -1309,7 +1309,7 @@ CONFIG_INTERCONNECT_QCOM_SDM845=y
 CONFIG_INTERCONNECT_QCOM_SM8150=m
 CONFIG_INTERCONNECT_QCOM_SM8250=m
 CONFIG_INTERCONNECT_QCOM_SM8350=m
-CONFIG_INTERCONNECT_QCOM_SM8450=m
+CONFIG_INTERCONNECT_QCOM_SM8450=y
 CONFIG_EXT2_FS=y
 CONFIG_EXT3_FS=y
 CONFIG_EXT4_FS_POSIX_ACL=y
-- 
2.34.1