Commit 03591160 authored by Sarthak Garg's avatar Sarthak Garg Committed by Ulf Hansson
Browse files

mmc: sdhci-msm: Read and use DLL Config property from device tree file 



Certain platforms require different settings in the
SDCC_HC_REG_DLL_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 DT file and use it.

Also use msm_cm_dll_set_freq only when DLL not supplied.

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/1590139950-7288-7-git-send-email-sartgarg@codeaurora.org


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 1dfbe3ff

drivers/mmc/host/sdhci-msm.c

+11 −2
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 dll_config;

	u32 ddr_config;

};
@@ -617,6 +618,9 @@ static int msm_init_cm_dll(struct sdhci_host *host) 
	config &= ~CORE_CLK_PWRSAVE;

	writel_relaxed(config, host->ioaddr + msm_offset->core_vendor_spec);



	config = msm_host->dll_config;

	writel_relaxed(config, host->ioaddr + msm_offset->core_dll_config);



	if (msm_host->use_14lpp_dll_reset) {

		config = readl_relaxed(host->ioaddr +

				msm_offset->core_dll_config);
@@ -642,6 +646,8 @@ static int msm_init_cm_dll(struct sdhci_host *host) 
	config |= CORE_DLL_PDN;

	writel_relaxed(config, host->ioaddr +

			msm_offset->core_dll_config);



	if (!msm_host->dll_config)

		msm_cm_dll_set_freq(host);



	if (msm_host->use_14lpp_dll_reset &&
@@ -682,6 +688,7 @@ static int msm_init_cm_dll(struct sdhci_host *host) 
			msm_offset->core_dll_config);



	if (msm_host->use_14lpp_dll_reset) {

		if (!msm_host->dll_config)

			msm_cm_dll_set_freq(host);

		config = readl_relaxed(host->ioaddr +

				msm_offset->core_dll_config_2);
@@ -1944,6 +1951,8 @@ static inline void sdhci_msm_get_of_property(struct platform_device *pdev, 
	if (of_property_read_u32(node, "qcom,ddr-config",

				&msm_host->ddr_config))

		msm_host->ddr_config = DDR_CONFIG_POR_VAL;



	of_property_read_u32(node, "qcom,dll-config", &msm_host->dll_config);

}

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