From: Zach Brown <zach.brown@ni.com> To: <ulf.hansson@linaro.org> Cc: <adrian.hunter@intel.com>, <robh+dt@kernel.org>, <mark.rutland@arm.com>, <linux-mmc@vger.kernel.org>, <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <zach.brown@ni.com> 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: Fri, 21 Oct 2016 16:35:15 -0500 [thread overview] Message-ID: <1477085715-30213-3-git-send-email-zach.brown@ni.com> (raw) In-Reply-To: <1477085715-30213-1-git-send-email-zach.brown@ni.com> 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
WARNING: multiple messages have this Message-ID (diff)
From: Zach Brown <zach.brown@ni.com> To: ulf.hansson@linaro.org Cc: adrian.hunter@intel.com, robh+dt@kernel.org, mark.rutland@arm.com, linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, zach.brown@ni.com 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: Fri, 21 Oct 2016 16:35:15 -0500 [thread overview] Message-ID: <1477085715-30213-3-git-send-email-zach.brown@ni.com> (raw) In-Reply-To: <1477085715-30213-1-git-send-email-zach.brown@ni.com> 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
next prev parent reply other threads:[~2016-10-21 21:35 UTC|newest] Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-10-21 21:35 [RFC v2 0/2] Ignore capability registers when it comes to speeds and use DT binding instead Zach Brown 2016-10-21 21:35 ` Zach Brown 2016-10-21 21:35 ` [RFC v2 1/2] mmc: sdhci: Add device tree property sdhci-cap-speed-modes-broken Zach Brown 2016-10-21 21:35 ` Zach Brown 2016-10-21 21:35 ` Zach Brown [this message] 2016-10-21 21:35 ` [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 2016-10-24 7:34 ` Adrian Hunter 2016-10-24 15:48 ` Zach Brown 2016-10-24 15:48 ` Zach Brown 2016-10-25 11:30 ` Adrian Hunter 2016-10-25 11:30 ` Adrian Hunter 2016-10-26 22:28 ` Zach Brown 2016-10-26 22:28 ` Zach Brown
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=1477085715-30213-3-git-send-email-zach.brown@ni.com \ --to=zach.brown@ni.com \ --cc=adrian.hunter@intel.com \ --cc=devicetree@vger.kernel.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-mmc@vger.kernel.org \ --cc=mark.rutland@arm.com \ --cc=robh+dt@kernel.org \ --cc=ulf.hansson@linaro.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.