[PATCH] arm64: dts: qcom: sc8280xp: fix ufs_card_phy ref clock

From: Johan Hovold
Date: Wed Oct 05 2022 - 10:33:34 EST

The GCC_UFS_REF_CLKREF_CLK must be enabled or the second UFS controller
fails to enumerate on sa8295p-adp.

Note that the vendor kernel enables both GCC_UFS_REF_CLKREF_CLK and
GCC_UFS_1_CARD_CLKREF_CLK and it is possible that the former should be
modelled as a parent of the latter. The clock driver also has a
GCC_UFS_CARD_CLKREF_CLK clock which the firmware appears to enable on
the ADP.

The usual lack of documentation for Qualcomm SoCs makes this a highly
annoying guessing game, but as the second controller works on the ADP
without either card reference clock enabled, only enable

Fixes: 152d1faf1e2f ("arm64: dts: qcom: add SC8280XP platform")
Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>

The related issue for the first controller is being fixed here:



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 cf7ef37c11ec..917f1feac6ac 100644
--- a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
@@ -960,7 +960,7 @@ ufs_card_phy: phy@1da7000 {
clock-names = "ref",
- clocks = <&gcc GCC_UFS_1_CARD_CLKREF_CLK>,
+ clocks = <&gcc GCC_UFS_REF_CLKREF_CLK>,

resets = <&ufs_card_hc 0>;