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Commit 34540b28 authored by Venkat Gopalakrishnan's avatar Venkat Gopalakrishnan
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mmc: host: Set max frequency when disabling clock scaling 



The mmc host needs to perform at its peak when clock scaling
is disabled, hence switch the frequency to max.

CRs-fixed: 981387
Change-Id: Ie959b8e565ee2dad53cdd9d913bcb8696519d7ca
Signed-off-by: default avatarVenkat Gopalakrishnan <venkatg@codeaurora.org>
parent 67928fab

drivers/mmc/core/host.c

+9 −4
Original line number Diff line number Diff line
@@ -566,11 +566,16 @@ static ssize_t store_enable(struct device *dev, 
	if (!host || kstrtoul(buf, 0, &value))

		return -EINVAL;



	mmc_claim_host(host);

	if (!value && host->clk_scaling.enable) {

		/*turnning off clock scaling*/

	mmc_get_card(host->card);



	if (!value) {

		/*turning off clock scaling*/

		mmc_exit_clk_scaling(host);

		host->caps2 &= ~MMC_CAP2_CLK_SCALE;

		host->clk_scaling.state = MMC_LOAD_HIGH;

		/* Set to max. frequency when disabling */

		mmc_clk_update_freq(host, host->card->clk_scaling_highest,

					host->clk_scaling.state);

	} else if (value) {

		/* starting clock scaling, will restart in case started */

		host->caps2 |= MMC_CAP2_CLK_SCALE;
@@ -579,7 +584,7 @@ static ssize_t store_enable(struct device *dev, 
		mmc_init_clk_scaling(host);

	}



	mmc_release_host(host);

	mmc_put_card(host->card);



	return count;

}