On 8/1/2025 2:32 PM, Krzysztof Kozlowski wrote:
On 01/08/2025 10:45, Sarthak Garg wrote:
The kernel now handles level shifter limitations affecting SD card
modes, making it unnecessary to explicitly disable SDR104 and SDR50
capabilities in the device tree.
However, due to board-specific hardware constraints particularly related
to level shifter in this case the maximum frequency for SD High-Speed
(HS) mode must be limited to 37.5 MHz to ensure reliable operation of SD
card in HS mode. This is achieved using the max-sd-hs-frequency property
in the board DTS.
Signed-off-by: Sarthak Garg <quic_sartgarg@xxxxxxxxxxx>
---
arch/arm64/boot/dts/qcom/sm8550-hdk.dts | 1 +
arch/arm64/boot/dts/qcom/sm8550-mtp.dts | 1 +
arch/arm64/boot/dts/qcom/sm8550-sony-xperia-yodo-pdx234.dts | 1 +
arch/arm64/boot/dts/qcom/sm8550.dtsi | 3 ---
4 files changed, 3 insertions(+), 3 deletions(-)
This will break MMC for all of the users and nothing in commit msg or
cover letter explains that or mentions merging strategy.
Exactly this case is covered by your internal guideline, no? Please read it.
Best regards,
Krzysztof
Just to make sure I’m addressing the right concern — are you primarily
worried about the introduction of the max-sd-hs-frequency property in
the board DTS files, or about the removal of the sdhci-caps-mask
from the common sm8550.dtsi?
