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Message-Id: <20221006145529.755521-1-bmasney@redhat.com>
Date: Thu, 6 Oct 2022 10:55:29 -0400
From: Brian Masney <bmasney@...hat.com>
To: andersson@...nel.org
Cc: agross@...nel.org, konrad.dybcio@...ainline.org,
robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, ahalaney@...hat.com,
echanude@...hat.com, johan+linaro@...nel.org
Subject: [PATCH v4] arm64: dts: qcom: sc8280xp: correct ref clock for ufs_mem_phy
The first UFS host controller fails to start on the SA8540P automotive
board (QDrive3) due to the following errors:
ufshcd-qcom 1d84000.ufs: ufshcd_query_flag: Sending flag query for idn 18 failed, err = 253
ufshcd-qcom 1d84000.ufs: ufshcd_query_flag: Sending flag query for idn 18 failed, err = 253
ufshcd-qcom 1d84000.ufs: ufshcd_query_flag: Sending flag query for idn 18 failed, err = 253
ufshcd-qcom 1d84000.ufs: ufshcd_query_flag_retry: query attribute, opcode 5, idn 18, failed
with error 253 after 3 retries
The system eventually fails to boot with the warning:
gcc_ufs_phy_axi_clk status stuck at 'off'
This issue can be worked around by adding clk_ignore_unused to the
kernel command line since the system firmware sets up this clock for us.
Let's fix this issue by updating the ref clock on ufs_mem_phy. Note
that the downstream MSM 5.4 sources list this as ref_clk_parent. With
this patch, the SA8540P is able to be booted without clk_ignore_unused.
Signed-off-by: Brian Masney <bmasney@...hat.com>
Fixes: 152d1faf1e2f ("arm64: dts: qcom: add SC8280XP platform")
Tested-by: Johan Hovold <johan+linaro@...nel.org>
Reviewed-by: Johan Hovold <johan+linaro@...nel.org>
---
Changes since v3:
- Renamed ref_aux to ref in patch subject. Added Johan's R-b and T-b.
v3 of this patch can be found at
https://lore.kernel.org/lkml/20220830180120.2082734-1-bmasney@redhat.com/
v2 of this patch can be found at
https://lore.kernel.org/lkml/20220825163755.683843-1-bmasney@redhat.com/T/#u
v1 of this patch can be found at
https://lore.kernel.org/lkml/20220623142837.3140680-1-bmasney@redhat.com/T/#u
arch/arm64/boot/dts/qcom/sc8280xp.dtsi | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
index c32bcded2aef..006b9a13bc2f 100644
--- a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
@@ -891,7 +891,7 @@ ufs_mem_phy: phy@...7000 {
ranges;
clock-names = "ref",
"ref_aux";
- clocks = <&rpmhcc RPMH_CXO_CLK>,
+ clocks = <&gcc GCC_UFS_REF_CLKREF_CLK>,
<&gcc GCC_UFS_PHY_PHY_AUX_CLK>;
resets = <&ufs_mem_hc 0>;
--
2.37.3
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