在 7/27/2023 3:59 PM, Konrad Dybcio 写道:
On 27.07.2023 08:56, Krzysztof Kozlowski wrote:
On 27/07/2023 04:35, Tengfei Fan wrote:
Add DTS for Qualcomm QRD platform which uses SM4450 SoC.
Signed-off-by: Tengfei Fan <quic_tengfan@xxxxxxxxxxx>
---
arch/arm64/boot/dts/qcom/Makefile | 1 +
arch/arm64/boot/dts/qcom/sm4450-qrd.dts | 18 ++++++++++++++++++
2 files changed, 19 insertions(+)
create mode 100644 arch/arm64/boot/dts/qcom/sm4450-qrd.dts
diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
index 337abc4ceb17..db805d0929c8 100644
--- a/arch/arm64/boot/dts/qcom/Makefile
+++ b/arch/arm64/boot/dts/qcom/Makefile
@@ -186,6 +186,7 @@ dtb-$(CONFIG_ARCH_QCOM) += sdm850-lenovo-yoga-c630.dtb
dtb-$(CONFIG_ARCH_QCOM) += sdm850-samsung-w737.dtb
dtb-$(CONFIG_ARCH_QCOM) += sdx75-idp.dtb
dtb-$(CONFIG_ARCH_QCOM) += sm4250-oneplus-billie2.dtb
+dtb-$(CONFIG_ARCH_QCOM) += sm4450-qrd.dtb
dtb-$(CONFIG_ARCH_QCOM) += sm6115-fxtec-pro1x.dtb
dtb-$(CONFIG_ARCH_QCOM) += sm6115p-lenovo-j606f.dtb
dtb-$(CONFIG_ARCH_QCOM) += sm6125-sony-xperia-seine-pdx201.dtb
diff --git a/arch/arm64/boot/dts/qcom/sm4450-qrd.dts b/arch/arm64/boot/dts/qcom/sm4450-qrd.dts
new file mode 100644
index 000000000000..04ad1dd4285a
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/sm4450-qrd.dts
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) 2023, Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+/dts-v1/;
+
+#include "sm4450.dtsi"
+/ {
+ model = "Qualcomm Technologies, Inc. SM4450 QRD";
+ compatible = "qcom,sm4450-qrd", "qcom,sm4450";
+
+ aliases { };
+
+ chosen {
+ bootargs = "console=hvc0 earlycon=hvc0 hvc_dcc.enable=1 cpuidle.off=1";
No earlycon, no hvc.enable (there is no such parameter), no cpuidle.off
(again don't add fake stuff). So the only suitable argument is console,
but this should be actually used via stdout path, although it seems
there is no device node for such usage?
hvc totally comes from Qualcomm downstream and all the Gunyah
shenanigans..
Tengfei, please ensure the patches are tested against linux-next
with no additional changes or modules, with a clean Linux userspace
(or at least a ramdisk).
Konrad
Hi Konrad,
All these patches are tesed on linux-next, and get DCC console.
For support this test, I did a temporal for enable CONFIG_HVC_DCC(this
change haven't push to upstream).
--
Thx and BRs,
Tengfei Fan
