From: Kevin Liu <[email protected]> According to spec, if timer count for retuning return 0xF, it means get information from other source.
Signed-off-by: Kevin Liu <[email protected]> --- drivers/mmc/host/sdhci.c | 8 ++++++++ drivers/mmc/host/sdhci.h | 1 + 2 files changed, 9 insertions(+), 0 deletions(-) diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 9f44efd..882223a 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -2963,6 +2963,14 @@ int sdhci_add_host(struct sdhci_host *host) /* Initial value for re-tuning timer count */ host->tuning_count = (caps[1] & SDHCI_RETUNING_TIMER_COUNT_MASK) >> SDHCI_RETUNING_TIMER_COUNT_SHIFT; + if (host->tuning_count == 0xF) { + if (host->ops->get_tuning_count) + host->tuning_count = + host->ops->get_tuning_count(host) & 0xF; + else + pr_err("%s: Hardware doesn't specify tuning count.\n", + mmc_hostname(mmc)); + } /* * In case Re-tuning Timer is not disabled, the actual value of diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index 5f20d32..d124f37 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -291,6 +291,7 @@ struct sdhci_ops { void (*platform_suspend)(struct sdhci_host *host); void (*platform_resume)(struct sdhci_host *host); void (*signal_voltage_switch)(struct sdhci_host *host, u8 vol); + unsigned int (*get_tuning_count)(struct sdhci_host *host); }; #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
