forked from luck/tmp_suning_uos_patched
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>
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@ -884,6 +884,28 @@ static int sdhci_msm_execute_tuning(struct sdhci_host *host, u32 opcode)
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return rc;
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}
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/*
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* sdhci_msm_hs400 - Calibrate the DLL for HS400 bus speed mode operation.
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* DLL operation is only needed for clock > 100MHz. For clock <= 100MHz
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* fixed feedback clock is used.
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*/
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static void sdhci_msm_hs400(struct sdhci_host *host, struct mmc_ios *ios)
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{
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
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struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
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int ret;
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if (host->clock > CORE_FREQ_100MHZ &&
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msm_host->tuning_done && !msm_host->calibration_done) {
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ret = sdhci_msm_hs400_dll_calibration(host);
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if (!ret)
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msm_host->calibration_done = true;
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else
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pr_err("%s: Failed to calibrate DLL for hs400 mode (%d)\n",
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mmc_hostname(host->mmc), ret);
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}
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}
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static void sdhci_msm_set_uhs_signaling(struct sdhci_host *host,
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unsigned int uhs)
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{
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@ -952,12 +974,10 @@ static void sdhci_msm_set_uhs_signaling(struct sdhci_host *host,
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sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
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spin_unlock_irq(&host->lock);
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/* CDCLP533 HW calibration is only required for HS400 mode*/
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if (host->clock > CORE_FREQ_100MHZ &&
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msm_host->tuning_done && !msm_host->calibration_done &&
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mmc->ios.timing == MMC_TIMING_MMC_HS400)
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if (!sdhci_msm_hs400_dll_calibration(host))
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msm_host->calibration_done = true;
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if (mmc->ios.timing == MMC_TIMING_MMC_HS400)
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sdhci_msm_hs400(host, &mmc->ios);
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spin_lock_irq(&host->lock);
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}
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