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Groups > linux.kernel > #1555001
| From | Ritesh Harjani <riteshh@codeaurora.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [RESEND PATCHv1 3/8] mmc: sdhci-msm: Factor out sdhci_msm_hs400 |
| Date | 2017-01-10 08:10 +0100 |
| Message-ID | <sXYJc-6JW-23@gated-at.bofh.it> (permalink) |
| References | <sXYJb-6JW-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
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>
---
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 3fc496e..5a37c29 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -884,6 +884,28 @@ static int sdhci_msm_execute_tuning(struct sdhci_host *host, u32 opcode)
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);
}
--
The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project.
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[RESEND PATCHv1 0/8] mmc: sdhci-msm: Provide support for enhanced strobe Ritesh Harjani <riteshh@codeaurora.org> - 2017-01-10 08:10 +0100 [RESEND PATCHv1 8/8] mmc: sdhci-msm: Provide enhanced_strobe mode feature support Ritesh Harjani <riteshh@codeaurora.org> - 2017-01-10 08:10 +0100 [RESEND PATCHv1 4/8] mmc: sdhci-msm: Reset vendor specific func register on probe Ritesh Harjani <riteshh@codeaurora.org> - 2017-01-10 08:10 +0100 [RESEND PATCHv1 7/8] mmc: sdhci-msm: Make HS400 tuning follow as per recommeneded HW sequence Ritesh Harjani <riteshh@codeaurora.org> - 2017-01-10 08:10 +0100 [RESEND PATCHv1 2/8] mmc: sdhci-msm: Factor out function to set/get msm clock rate Ritesh Harjani <riteshh@codeaurora.org> - 2017-01-10 08:10 +0100 [RESEND PATCHv1 6/8] mmc: sdhci: Clear SDHCI_HS400_TUNING flag after platform_execute_tuning Ritesh Harjani <riteshh@codeaurora.org> - 2017-01-10 08:10 +0100 [RESEND PATCHv1 3/8] mmc: sdhci-msm: Factor out sdhci_msm_hs400 Ritesh Harjani <riteshh@codeaurora.org> - 2017-01-10 08:10 +0100 [RESEND PATCHv1 1/8] mmc: sdhci-msm: Factor out sdhci_msm_hc_select_mode Ritesh Harjani <riteshh@codeaurora.org> - 2017-01-10 08:10 +0100
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