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Commit f4748499 authored by San Mehat's avatar San Mehat Committed by Daniel Walker
Browse files

mmc: msm_sdcc: Featurize busclock power save and disable it by default 



Signed-off-by: default avatarSan Mehat <san@google.com>
Signed-off-by: default avatarDaniel Walker <dwalker@codeaurora.org>
parent c7fc9370

drivers/mmc/host/msm_sdcc.c

+13 −0
Original line number Diff line number Diff line
@@ -48,6 +48,7 @@ 


#define DRIVER_NAME "msm-sdcc"



#define BUSCLK_PWRSAVE 0

#define BUSCLK_TIMEOUT (HZ)

static unsigned int msmsdcc_fmin = 144000;

static unsigned int msmsdcc_fmax = 50000000;
@@ -65,6 +66,8 @@ msmsdcc_disable_clocks(struct msmsdcc_host *host, int deferr) 
{

	WARN_ON(!host->clks_on);



	BUG_ON(host->curr.mrq);



	if (deferr) {

		mod_timer(&host->busclk_timer, jiffies + BUSCLK_TIMEOUT);

	} else {
@@ -131,7 +134,9 @@ msmsdcc_request_end(struct msmsdcc_host *host, struct mmc_request *mrq) 
	if (mrq->cmd->error == -ETIMEDOUT)

		mdelay(5);



#if BUSCLK_PWRSAVE

	msmsdcc_disable_clocks(host, 1);

#endif

	/*

	 * Need to drop the host lock here; mmc_request_done may call

	 * back into the driver...
@@ -257,7 +262,9 @@ msmsdcc_dma_complete_func(struct msm_dmov_cmd *cmd, 
			mrq->data->bytes_xfered = host->curr.data_xfered;



			spin_unlock_irqrestore(&host->lock, flags);

#if BUSCLK_PWRSAVE

			msmsdcc_disable_clocks(host, 1);

#endif

			mmc_request_done(host->mmc, mrq);

			return;

		} else
@@ -934,7 +941,9 @@ msmsdcc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 
		host->pwr = pwr;

		msmsdcc_writel(host, pwr, MMCIPOWER);

	}

#if BUSCLK_PWRSAVE

	msmsdcc_disable_clocks(host, 1);

#endif

	spin_unlock_irqrestore(&host->lock, flags);

}
@@ -1279,7 +1288,9 @@ msmsdcc_probe(struct platform_device *pdev) 
	if (host->timer.function)

		pr_info("%s: Polling status mode enabled\n", mmc_hostname(mmc));



#if BUSCLK_PWRSAVE

	msmsdcc_disable_clocks(host, 1);

#endif

	return 0;

 cmd_irq_free:

	free_irq(cmd_irqres->start, host);
@@ -1341,7 +1352,9 @@ msmsdcc_resume(struct platform_device *dev) 
			mmc_resume_host(mmc);

		if (host->stat_irq)

			enable_irq(host->stat_irq);

#if BUSCLK_PWRSAVE

		msmsdcc_disable_clocks(host, 1);

#endif

	}

	return 0;

}