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Groups > linux.kernel > #1506317
| From | Zach Brown <zach.brown@ni.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [RFC v2 2/2] mmc: sdhci: Ignore capability register when it comes to speeds and use DT binding instead when sdhci-cap-speed-modes-broken is set. |
| Date | 2016-10-21 23:40 +0200 |
| Message-ID | <suPHH-2MQ-15@gated-at.bofh.it> (permalink) |
| References | <suPHH-2MQ-9@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
When the sdhci-cap-speed-modes-broken DT property is set, the driver will ignore the bits of the capability registers that correspond to speed modes. Signed-off-by: Zach Brown <zach.brown@ni.com> --- drivers/mmc/host/sdhci.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 1e25b01..59c62d3 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -22,6 +22,7 @@ #include <linux/scatterlist.h> #include <linux/regulator/consumer.h> #include <linux/pm_runtime.h> +#include <linux/of.h> #include <linux/leds.h> @@ -3013,10 +3014,19 @@ void __sdhci_read_caps(struct sdhci_host *host, u16 *ver, u32 *caps, u32 *caps1) host->caps = caps ? *caps : sdhci_readl(host, SDHCI_CAPABILITIES); + if (of_property_read_bool(mmc_dev(host->mmc)->of_node, + "sdhci-cap-speed-modes-broken")) + host->caps &= ~SDHCI_CAN_DO_HISPD; + if (host->version < SDHCI_SPEC_300) return; host->caps1 = caps1 ? *caps1 : sdhci_readl(host, SDHCI_CAPABILITIES_1); + + if (of_property_read_bool(mmc_dev(host->mmc)->of_node, + "sdhci-cap-speed-modes-broken")) + host->caps1 &= ~(SDHCI_SUPPORT_SDR50 | SDHCI_SUPPORT_SDR104 | + SDHCI_SUPPORT_DDR50 | SDHCI_SUPPORT_HS400); } EXPORT_SYMBOL_GPL(__sdhci_read_caps); -- 2.7.4
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[RFC v2 0/2] Ignore capability registers when it comes to speeds and use DT binding instead. Zach Brown <zach.brown@ni.com> - 2016-10-21 23:40 +0200
[RFC v2 2/2] mmc: sdhci: Ignore capability register when it comes to speeds and use DT binding instead when sdhci-cap-speed-modes-broken is set. Zach Brown <zach.brown@ni.com> - 2016-10-21 23:40 +0200
Re: [RFC v2 2/2] mmc: sdhci: Ignore capability register when it comes to speeds and use DT binding instead when sdhci-cap-speed-modes-broken is set. Adrian Hunter <adrian.hunter@intel.com> - 2016-10-24 09:40 +0200
Re: [RFC v2 2/2] mmc: sdhci: Ignore capability register when it comes to speeds and use DT binding instead when sdhci-cap-speed-modes-broken is set. Adrian Hunter <adrian.hunter@intel.com> - 2016-10-25 13:40 +0200
[RFC v2 1/2] mmc: sdhci: Add device tree property sdhci-cap-speed-modes-broken Zach Brown <zach.brown@ni.com> - 2016-10-21 23:40 +0200
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