[PATCH v8 14/16] mmc: sdhci-msm: Save the calculated tuning phase
From: Ritesh Harjani <hidden>
Date: 2016-11-16 16:00:50
Also in:
linux-arm-msm, linux-clk, linux-mmc
Subsystem:
arm/qualcomm mailing list, multimedia card (mmc), secure digital (sd) and sdio subsystem, secure digital host controller interface (sdhci) driver, the rest · Maintainers:
Ulf Hansson, Adrian Hunter, Linus Torvalds
Save the tuning phase once the tuning is performed. This phase value will be used while calibrating DLL for HS400 mode. Signed-off-by: Ritesh Harjani <redacted> Acked-by: Adrian Hunter <adrian.hunter@intel.com> --- drivers/mmc/host/sdhci-msm.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index ab59171..1556d45 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c@@ -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)) {
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