Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 6ab3e82f authored by Sarthak Garg's avatar Sarthak Garg
Browse files

mmc: sdhci-msm: Introduce timeout freq divider in sdhci host 



Some SD host controllers multiplies the timeout-clk internally while
deriving the timeout value. So allow vendor driver to update the
timeout-clock to get the correct data timeout counter value.

Change-Id: Iacbd98f5251d5312c999478b0d0aac3abc339323
Suggested-by: default avatarVeerabhadrarao Badiganti <vbadigan@codeaurora.org>
Signed-off-by: default avatarSarthak Garg <sartgarg@codeaurora.org>
parent b490abfe

drivers/mmc/host/sdhci.c

+13 −0
Original line number Diff line number Diff line
@@ -2040,6 +2040,10 @@ void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 
			host->timeout_clk = host->mmc->actual_clock ?

						host->mmc->actual_clock / 1000 :

						host->clock / 1000;



#if defined(CONFIG_SDC_QTI)

			host->timeout_clk /= host->timeout_clk_div;

#endif

			host->mmc->max_busy_timeout =

				host->ops->get_max_timeout_count ?

				host->ops->get_max_timeout_count(host) :
@@ -3891,6 +3895,11 @@ int sdhci_setup_host(struct sdhci_host *host) 


	override_timeout_clk = host->timeout_clk;



#if defined(CONFIG_SDC_QTI)

	if (!host->timeout_clk_div)

		host->timeout_clk_div = 1;

#endif



	if (host->version > SDHCI_SPEC_420) {

		pr_err("%s: Unknown controller version (%d). You may experience problems.\n",

		       mmc_hostname(mmc), host->version);
@@ -4088,6 +4097,10 @@ int sdhci_setup_host(struct sdhci_host *host) 
		if (override_timeout_clk)

			host->timeout_clk = override_timeout_clk;



#if defined(CONFIG_SDC_QTI)

		host->timeout_clk /= host->timeout_clk_div;

#endif



		mmc->max_busy_timeout = host->ops->get_max_timeout_count ?

			host->ops->get_max_timeout_count(host) : 1 << 27;

		mmc->max_busy_timeout /= host->timeout_clk;

drivers/mmc/host/sdhci.h

+5 −0
Original line number Diff line number Diff line
@@ -524,6 +524,11 @@ struct sdhci_host { 


	unsigned int max_clk;	/* Max possible freq (MHz) */

	unsigned int timeout_clk;	/* Timeout freq (KHz) */



#if defined(CONFIG_SDC_QTI)

	u8 timeout_clk_div;     /* Timeout freq (KHz) divider */

#endif



	unsigned int clk_mul;	/* Clock Muliplier value */



	unsigned int clock;	/* Current clock (MHz) */