diff options
| -rw-r--r-- | drivers/mmc/host/sdhci-msm.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c index d29ed9f3baec..4ebbcfaa2fab 100644 --- a/drivers/mmc/host/sdhci-msm.c +++ b/drivers/mmc/host/sdhci-msm.c @@ -2,7 +2,7 @@ * drivers/mmc/host/sdhci-msm.c - Qualcomm Technologies, Inc. MSM SDHCI Platform * driver source file * - * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved. + * Copyright (c) 2012-2014, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -2453,6 +2453,12 @@ static void sdhci_msm_set_clock(struct sdhci_host *host, unsigned int clock) bool curr_pwrsave; if (!clock) { + /* + * disable pwrsave to ensure clock is not auto-gated until + * the rate is >400KHz (initialization complete). + */ + writel_relaxed(readl_relaxed(host->ioaddr + CORE_VENDOR_SPEC) & + ~CORE_CLK_PWRSAVE, host->ioaddr + CORE_VENDOR_SPEC); sdhci_msm_prepare_clocks(host, false); host->clock = clock; goto out; |