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Commit abf270e5 authored by Ritesh Harjani's avatar Ritesh Harjani Committed by Ulf Hansson
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mmc: sdhci-msm: Save the calculated tuning phase 



Save the tuning phase once the tuning is performed.
This phase value will be used while calibrating DLL
for HS400 mode.

Signed-off-by: default avatarRitesh Harjani <riteshh@codeaurora.org>
Acked-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent ff06ce41

drivers/mmc/host/sdhci-msm.c

+10 −0
Original line number Diff line number Diff line
@@ -75,6 +75,7 @@ 


#define CORE_VENDOR_SPEC_CAPABILITIES0	0x11c



#define INVALID_TUNING_PHASE	-1

#define SDHCI_MSM_MIN_CLOCK	400000

#define CORE_FREQ_100MHZ	(100 * 1000 * 1000)
@@ -97,6 +98,7 @@ struct sdhci_msm_host { 
	bool use_14lpp_dll_reset;

	bool tuning_done;

	bool calibration_done;

	u8 saved_tuning_phase;

};



/* Platform specific tuning */
@@ -136,6 +138,9 @@ static int msm_config_cm_dll_phase(struct sdhci_host *host, u8 phase) 
	u32 config;

	struct mmc_host *mmc = host->mmc;



	if (phase > 0xf)

		return -EINVAL;



	spin_lock_irqsave(&host->lock, flags);



	config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG);
@@ -429,6 +434,8 @@ static int sdhci_msm_execute_tuning(struct sdhci_host *host, u32 opcode) 
	int rc;

	struct mmc_host *mmc = host->mmc;

	struct mmc_ios ios = host->mmc->ios;

	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);

	struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);



	/*

	 * Tuning is required for SDR104, HS200 and HS400 cards and
@@ -453,6 +460,7 @@ static int sdhci_msm_execute_tuning(struct sdhci_host *host, u32 opcode) 
		if (rc)

			return rc;



		msm_host->saved_tuning_phase = phase;

		rc = mmc_send_tuning(mmc, opcode, NULL);

		if (!rc) {

			/* Tuning is successful at this tuning point */
@@ -799,6 +807,8 @@ static int sdhci_msm_probe(struct platform_device *pdev) 


	sdhci_get_of_property(pdev);



	msm_host->saved_tuning_phase = INVALID_TUNING_PHASE;



	/* Setup SDCC bus voter clock. */

	msm_host->bus_clk = devm_clk_get(&pdev->dev, "bus");

	if (!IS_ERR(msm_host->bus_clk)) {