diff options
| author | Ritesh Harjani | 2017-01-10 12:30:47 +0530 |
|---|---|---|
| committer | Ulf Hansson | 2017-02-13 13:20:29 +0100 |
| commit | db9bd1638115f76c09a9d5b58a01552d49ed1df5 (patch) | |
| tree | fb6599415dcdbb8f21cf408619ce454f8a50506e /drivers/mmc/host/sdhci-msm.c | |
| parent | 0fb8a3d46b0393a8580ed78a0bc9267869f76b3c (diff) | |
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 <riteshh@codeaurora.org>
Tested-by: Jeremy McNicoll <jeremymc@redhat.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/sdhci-msm.c')
| -rw-r--r-- | drivers/mmc/host/sdhci-msm.c | 32 |
1 files 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); } |