From db9bd1638115f76c09a9d5b58a01552d49ed1df5 Mon Sep 17 00:00:00 2001 From: Ritesh Harjani Date: Tue, 10 Jan 2017 12:30:47 +0530 Subject: [PATCH] mmc: sdhci-msm: Factor out sdhci_msm_hs400 Factor out sdhci_msm_hs400 used for DLL calibration in HS400 modes. This function will be needed for enhanced_strobe as well. Signed-off-by: Ritesh Harjani Tested-by: Jeremy McNicoll Acked-by: Adrian Hunter Signed-off-by: Ulf Hansson --- drivers/mmc/host/sdhci-msm.c | 32 ++++++++++++++++++++++++++------ 1 file changed, 26 insertions(+), 6 deletions(-) diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c index 3fc496e24b23..5a37c294b17a 100644 --- a/drivers/mmc/host/sdhci-msm.c +++ b/drivers/mmc/host/sdhci-msm.c @@ -884,6 +884,28 @@ retry: return rc; } +/* + * sdhci_msm_hs400 - Calibrate the DLL for HS400 bus speed mode operation. + * DLL operation is only needed for clock > 100MHz. For clock <= 100MHz + * fixed feedback clock is used. + */ +static void sdhci_msm_hs400(struct sdhci_host *host, struct mmc_ios *ios) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + int ret; + + if (host->clock > CORE_FREQ_100MHZ && + msm_host->tuning_done && !msm_host->calibration_done) { + ret = sdhci_msm_hs400_dll_calibration(host); + if (!ret) + msm_host->calibration_done = true; + else + pr_err("%s: Failed to calibrate DLL for hs400 mode (%d)\n", + mmc_hostname(host->mmc), ret); + } +} + static void sdhci_msm_set_uhs_signaling(struct sdhci_host *host, unsigned int uhs) { @@ -952,12 +974,10 @@ static void sdhci_msm_set_uhs_signaling(struct sdhci_host *host, sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2); spin_unlock_irq(&host->lock); - /* CDCLP533 HW calibration is only required for HS400 mode*/ - if (host->clock > CORE_FREQ_100MHZ && - msm_host->tuning_done && !msm_host->calibration_done && - mmc->ios.timing == MMC_TIMING_MMC_HS400) - if (!sdhci_msm_hs400_dll_calibration(host)) - msm_host->calibration_done = true; + + if (mmc->ios.timing == MMC_TIMING_MMC_HS400) + sdhci_msm_hs400(host, &mmc->ios); + spin_lock_irq(&host->lock); }