Commit 1dfbe3ff authored by Sarthak Garg's avatar Sarthak Garg Committed by Ulf Hansson
Browse files

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: default avatarBao D. Nguyen <nguyenb@codeaurora.org>
Signed-off-by: default avatarSarthak Garg <sartgarg@codeaurora.org>
Acked-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/1590139950-7288-6-git-send-email-sartgarg@codeaurora.org


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 04816e67

drivers/mmc/host/sdhci-msm.c

+16 −1
Original line number Diff line number Diff line
@@ -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;

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