linux-kernel - [PATCH 0/3] BCM2711 sdhci-iproc improvements

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Message-Id: <20210406104802.20898-1-nsaenz@kernel.org>
Date:   Tue,  6 Apr 2021 12:47:59 +0200
From:   Nicolas Saenz Julienne <nsaenz@...nel.org>
To:     linux-arm-kernel@...ts.infradead.org, linux-mmc@...r.kernel.org,
        devicetree@...r.kernel.org, bcm-kernel-feedback-list@...adcom.com,
        linux-rpi-kernel@...ts.infradead.org,
        Ray Jui <ray.jui@...adcom.com>,
        Scott Branden <scott.branden@...adcom.com>,
        Saenz Julienne <nsaenz@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Stefan Wahren <wahrenst@....net>,
        Matthias Brugger <mbrugger@...e.com>
Cc:     f.fainelli@...il.com, phil@...pberrypi.com,
        tim.gover@...pberrypi.com, adrian.hunter@...el.com,
        sbranden@...adcom.com, alcooperx@...il.com, nsaenzjulienne@...e.de,
        linux-kernel@...r.kernel.org, robh@...nel.org,
        stefan.wahren@...e.com
Subject: [PATCH 0/3] BCM2711 sdhci-iproc improvements

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

-- 
2.30.2