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SubjectRe: [PATCH] mmc: sdhci-of-arasan: Add quirk to avoid erroneous msg
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On 27/02/18 15:55, Phil Edworthy wrote:
> Since the controller does not support the end-of-busy IRQ, don't use it.
> Otherwise, on older SD cards you will get lots of these messages:
> "mmc0: Got data interrupt 0x00000002 even though no data operation was in progress"

SDHCI_QUIRK2_STOP_WITH_TC may be the quirk you want but it doesn't match
your description. SDHCI_QUIRK2_STOP_WITH_TC is when we always get a TC
(end-of-busy) IRQ with the STOP command even when we didn't ask for one.
Hence the TC interrupt (0x00000002) comes when we think we are already finished.

>
> This has been reported on Xilinx devices that also use the Arasan IP.
> See https://patchwork.kernel.org/patch/8062871/
>
> This has been tested on the Renesas RZ/ND-DB board with the RZ/N1 SoC.
>
> Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
> ---
> drivers/mmc/host/sdhci-of-arasan.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c
> index c33a5f7..ab66e32 100644
> --- a/drivers/mmc/host/sdhci-of-arasan.c
> +++ b/drivers/mmc/host/sdhci-of-arasan.c
> @@ -290,7 +290,8 @@ static const struct sdhci_pltfm_data sdhci_arasan_pdata = {
> .ops = &sdhci_arasan_ops,
> .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
> .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
> - SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN,
> + SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
> + SDHCI_QUIRK2_STOP_WITH_TC,
> };
>
> static u32 sdhci_arasan_cqhci_irq(struct sdhci_host *host, u32 intmask)
>

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