This series tries to address rather odd behavior from BCM2711's integration of sdhci-iproc (Raspberry Pi 4's SoC). The controller will timeout on SDHCI CMDs under the following conditions: - No SD card plugged in (the card polling thread is running, CD irq disabled). - BCM2711's VPU clock configured at 500MHz or more, lower clocks are OK. There is no specific command that will time out, it seems random. I found out that by bumping the controller's frequency to 150MHz the issue disapears. So let's do that. Regards, Nicolas --- Nicolas Saenz Julienne (4): dt-bindings: mmc: iproc-sdhci: Convert to json-schema dt-bindings: mmc: iproc-sdhci: Add clock-frequency support mmc: sdhci-iproc: Set clock frequency as per DT ARM: dts: Fix-up EMMC2 controller's frequency .../bindings/mmc/brcm,iproc-sdhci.yaml | 64 +++++++++++++++++++ .../bindings/mmc/brcm,sdhci-iproc.txt | 37 ----------- arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 6 ++ drivers/mmc/host/sdhci-iproc.c | 10 +++ 4 files changed, 80 insertions(+), 37 deletions(-) create mode 100644 Documentation/devicetree/bindings/mmc/brcm,iproc-sdhci.yaml delete mode 100644 Documentation/devicetree/bindings/mmc/brcm,sdhci-iproc.txt -- 2.30.2
