[U-Boot] [PATCH 1/2] mmc: sdhci: Clear high speed if not supported
From: Siva Durga Prasad Paladugu siva.durga.paladugu@xilinx.com
Clear high speed bit if it was not supported by the driver.
Signed-off-by: Siva Durga Prasad Paladugu sivadur@xilinx.com Signed-off-by: Emil Lenchak emill@xilinx.com Signed-off-by: Michal Simek michal.simek@xilinx.com ---
drivers/mmc/sdhci.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c index 02d71b934409..ff770b16e27a 100644 --- a/drivers/mmc/sdhci.c +++ b/drivers/mmc/sdhci.c @@ -530,6 +530,10 @@ int add_sdhci(struct sdhci_host *host, u32 max_clk, u32 min_clk) if (caps & SDHCI_CAN_DO_8BIT) host->cfg.host_caps |= MMC_MODE_8BIT; } + + if (host->quirks & SDHCI_QUIRK_NO_HISPD_BIT) + host->cfg.host_caps &= ~(MMC_MODE_HS | MMC_MODE_HS_52MHz); + if (host->host_caps) host->cfg.host_caps |= host->host_caps;
From: Siva Durga Prasad Paladugu siva.durga.paladugu@xilinx.com
Add quirk to disable high speed incase the high speed was broken.This solves the issue where the the controller is used in High Speed Mode and the the hold time requirement for the JEDEC/MMC 4.41 specification is NOT met. This timing issue is not on all boards and hence provided config option to enable it when required.
Signed-off-by: Siva Durga Prasad Paladugu sivadur@xilinx.com Signed-off-by: Emil Lenchak emill@xilinx.com Signed-off-by: Michal Simek michal.simek@xilinx.com ---
drivers/mmc/zynq_sdhci.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/mmc/zynq_sdhci.c b/drivers/mmc/zynq_sdhci.c index f21ea524af9f..039ec16e91fe 100644 --- a/drivers/mmc/zynq_sdhci.c +++ b/drivers/mmc/zynq_sdhci.c @@ -24,6 +24,11 @@ static int arasan_sdhci_probe(struct udevice *dev)
host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD | SDHCI_QUIRK_BROKEN_R1B; + +#ifdef CONFIG_ZYNQ_HISPD_BROKEN + host->quirks |= SDHCI_QUIRK_NO_HISPD_BIT; +#endif + host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
add_sdhci(host, CONFIG_ZYNQ_SDHCI_MAX_FREQ,
participants (1)
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Michal Simek