diff options
Diffstat (limited to 'arm-sdhci-esdhc-imx-fixes.patch')
| -rw-r--r-- | arm-sdhci-esdhc-imx-fixes.patch | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/arm-sdhci-esdhc-imx-fixes.patch b/arm-sdhci-esdhc-imx-fixes.patch new file mode 100644 index 000000000..5f041cedc --- /dev/null +++ b/arm-sdhci-esdhc-imx-fixes.patch @@ -0,0 +1,57 @@ +From patchwork Thu Jun 28 08:13:30 2018 +Content-Type: text/plain; charset="utf-8" +MIME-Version: 1.0 +Content-Transfer-Encoding: 7bit +Subject: [2/3] mmc: sdhci: add quirk to prevent higher speed modes +From: Stefan Agner <stefan@agner.ch> +X-Patchwork-Id: 10493273 +Message-Id: <20180628081331.13051-3-stefan@agner.ch> +To: adrian.hunter@intel.com, ulf.hansson@linaro.org +Cc: fabio.estevam@nxp.com, haibo.chen@nxp.com, aisheng.dong@nxp.com, + michael@amarulasolutions.com, rmk+kernel@armlinux.org.uk, + linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, + Stefan Agner <stefan@agner.ch> +Date: Thu, 28 Jun 2018 10:13:30 +0200 + +Some hosts are capable of running higher speed modes but do not +have the board support for it. Introduce a quirk which prevents +the stack from using modes running at 100MHz or faster. + +Signed-off-by: Stefan Agner <stefan@agner.ch> +--- + drivers/mmc/host/sdhci.c | 8 ++++++++ + drivers/mmc/host/sdhci.h | 2 ++ + 2 files changed, 10 insertions(+) + +diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c +index 1c828e0e9905..8ac257dfaab3 100644 +--- a/drivers/mmc/host/sdhci.c ++++ b/drivers/mmc/host/sdhci.c +@@ -3749,6 +3749,14 @@ int sdhci_setup_host(struct sdhci_host *host) + } + } + ++ if (host->quirks2 & SDHCI_QUIRK2_NO_UHS_HS200_HS400) { ++ host->caps1 &= ~(SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 | ++ SDHCI_SUPPORT_DDR50); ++ ++ mmc->caps2 &= ~(MMC_CAP2_HSX00_1_8V | MMC_CAP2_HSX00_1_2V | ++ MMC_CAP2_HS400_ES); ++ } ++ + if (host->quirks2 & SDHCI_QUIRK2_NO_1_8_V) { + host->caps1 &= ~(SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 | + SDHCI_SUPPORT_DDR50); +diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h +index 23966f887da6..cb2433d6d61f 100644 +--- a/drivers/mmc/host/sdhci.h ++++ b/drivers/mmc/host/sdhci.h +@@ -450,6 +450,8 @@ struct sdhci_host { + * obtainable timeout. + */ + #define SDHCI_QUIRK2_DISABLE_HW_TIMEOUT (1<<17) ++/* Do not support any higher speeds (>50MHz) */ ++#define SDHCI_QUIRK2_NO_UHS_HS200_HS400 (1<<18) + + int irq; /* Device IRQ */ + void __iomem *ioaddr; /* Mapped address */ |