[PATCH 0/3] BCM2711 sdhci-iproc improvements

Nicolas Saenz Julienne
2021-04-06T10:48:37Z

This is a follow-up series to "BCM2711's sdhci-iproc CMD timeouts"[1],
but since much most of the patches changed I decided to start counting
patch revisions from scratch.

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.

As an extra to this I also include a small fix, and convert the
controller's bindings to yaml.

Regards,
Nicolas

[1] https://lore.kernel.org/linux-mmc/20210322185816.27582-1-nsaenz@kernel.org/

---

Nicolas Saenz Julienne (3):
dt-bindings: mmc: iproc-sdhci: Convert to json-schema
mmc: sdhci-iproc: Cap min clock frequency on BCM2711
mmc: sdhci-iproc: Set SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN on BCM2711

.../bindings/mmc/brcm,iproc-sdhci.yaml | 63 +++++++++++++++++++
.../bindings/mmc/brcm,sdhci-iproc.txt | 37 -----------
drivers/mmc/host/sdhci-iproc.c | 21 ++++++-
3 files changed, 83 insertions(+), 38 deletions(-)
create mode 100644 Documentation/devicetree/bindings/mmc/brcm,iproc-sdhci.yaml
delete mode 100644 Documentation/devicetree/bindings/mmc/brcm,sdhci-iproc.txt

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2.30.2