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| author | Sarthak Garg <sartgarg@codeaurora.org> | 2020-05-22 15:02:27 +0530 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2020-05-28 11:22:16 +0200 |
| commit | 1dfbe3ff81f941bb0b39ea6b9f2e8771ef4cb3ea (patch) | |
| tree | d06c7387e777ca42c631f51ad97502a6d22be9b7 /drivers/mmc | |
| parent | 04816e672d46a1aabb1a35d73ca5f90d6d252ca3 (diff) | |
| download | linux-1dfbe3ff81f941bb0b39ea6b9f2e8771ef4cb3ea.tar.gz linux-1dfbe3ff81f941bb0b39ea6b9f2e8771ef4cb3ea.tar.bz2 linux-1dfbe3ff81f941bb0b39ea6b9f2e8771ef4cb3ea.zip | |
mmc: sdhci-msm: Update DDR_CONFIG as per device tree file
Certain platforms require different settings in the
SDCC_HC_REG_DDR_CONFIG register. This setting can change from platform
to platform. So the driver should check whether a particular platform
require a different setting by reading the device tree file and use it.
Signed-off-by: Bao D. Nguyen <nguyenb@codeaurora.org>
Signed-off-by: Sarthak Garg <sartgarg@codeaurora.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/1590139950-7288-6-git-send-email-sartgarg@codeaurora.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci-msm.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c index 054b1512c446..1e406f500ffc 100644 --- a/drivers/mmc/host/sdhci-msm.c +++ b/drivers/mmc/host/sdhci-msm.c @@ -275,6 +275,7 @@ struct sdhci_msm_host { u32 transfer_mode; bool updated_ddr_cfg; bool uses_tassadar_dll; + u32 ddr_config; }; static const struct sdhci_msm_offset *sdhci_priv_msm_offset(struct sdhci_host *host) @@ -987,7 +988,7 @@ static int sdhci_msm_cm_dll_sdc4_calibration(struct sdhci_host *host) ddr_cfg_offset = msm_offset->core_ddr_config; else ddr_cfg_offset = msm_offset->core_ddr_config_old; - writel_relaxed(DDR_CONFIG_POR_VAL, host->ioaddr + ddr_cfg_offset); + writel_relaxed(msm_host->ddr_config, host->ioaddr + ddr_cfg_offset); if (mmc->ios.enhanced_strobe) { config = readl_relaxed(host->ioaddr + @@ -1933,6 +1934,19 @@ static const struct sdhci_pltfm_data sdhci_msm_pdata = { .ops = &sdhci_msm_ops, }; +static inline void sdhci_msm_get_of_property(struct platform_device *pdev, + struct sdhci_host *host) +{ + struct device_node *node = pdev->dev.of_node; + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + + if (of_property_read_u32(node, "qcom,ddr-config", + &msm_host->ddr_config)) + msm_host->ddr_config = DDR_CONFIG_POR_VAL; +} + + static int sdhci_msm_probe(struct platform_device *pdev) { struct sdhci_host *host; @@ -1976,6 +1990,7 @@ static int sdhci_msm_probe(struct platform_device *pdev) msm_offset = msm_host->offset; sdhci_get_of_property(pdev); + sdhci_msm_get_of_property(pdev, host); msm_host->saved_tuning_phase = INVALID_TUNING_PHASE; |