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mmc: msm_sdcc: Fix clocks not being turned off during suspend

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When CONFIG_MMC_CLKGATE is not defined the SDCC
clocks would always be on even though the suspend
framework tries to suspend the device.

Change-Id: I8855b1fed40ee567a0433c5d36071458a8c5a48c
Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>
This commit is contained in:
Sujit Reddy Thumma
2012-06-13 08:56:32 +05:30
committed by Stephen Boyd
parent 48ac59797a
commit 1ff096218e
1 changed files with 45 additions and 14 deletions
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59
drivers/mmc/host/msm_sdcc.c
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@@ -5404,6 +5404,49 @@ int msmsdcc_sdio_al_lpm(struct mmc_host *mmc, bool enable)
#endif
#ifdef CONFIG_PM
#ifdef CONFIG_MMC_CLKGATE
static inline void msmsdcc_gate_clock(struct msmsdcc_host *host)
{
struct mmc_host *mmc = host->mmc;
unsigned long flags;
mmc_host_clk_hold(mmc);
spin_lock_irqsave(&mmc->clk_lock, flags);
mmc->clk_old = mmc->ios.clock;
mmc->ios.clock = 0;
mmc->clk_gated = true;
spin_unlock_irqrestore(&mmc->clk_lock, flags);
mmc_set_ios(mmc);
mmc_host_clk_release(mmc);
}
static inline void msmsdcc_ungate_clock(struct msmsdcc_host *host)
{
struct mmc_host *mmc = host->mmc;
mmc_host_clk_hold(mmc);
mmc->ios.clock = host->clk_rate;
mmc_set_ios(mmc);
mmc_host_clk_release(mmc);
}
#else
static inline void msmsdcc_gate_clock(struct msmsdcc_host *host)
{
struct mmc_host *mmc = host->mmc;
mmc->ios.clock = 0;
mmc_set_ios(mmc);
}
static inline void msmsdcc_ungate_clock(struct msmsdcc_host *host)
{
struct mmc_host *mmc = host->mmc;
mmc->ios.clock = host->clk_rate;
mmc_set_ios(mmc);
}
#endif
static int
msmsdcc_runtime_suspend(struct device *dev)
{
@@ -5450,21 +5493,12 @@ msmsdcc_runtime_suspend(struct device *dev)
spin_unlock_irqrestore(&host->lock, flags);
if (mmc->card && mmc_card_sdio(mmc->card) &&
mmc->ios.clock) {
#ifdef CONFIG_MMC_CLKGATE
/*
* If SDIO function driver doesn't want
* to power off the card, atleast turn off
* clocks to allow deep sleep (TCXO shutdown).
*/
mmc_host_clk_hold(mmc);
spin_lock_irqsave(&mmc->clk_lock, flags);
mmc->clk_old = mmc->ios.clock;
mmc->ios.clock = 0;
mmc->clk_gated = true;
spin_unlock_irqrestore(&mmc->clk_lock, flags);
mmc_set_ios(mmc);
mmc_host_clk_release(mmc);
#endif
msmsdcc_gate_clock(host);
}
}
host->sdcc_suspending = 0;
@@ -5493,10 +5527,7 @@ msmsdcc_runtime_resume(struct device *dev)
if (mmc) {
if (mmc->card && mmc_card_sdio(mmc->card) &&
mmc_card_keep_power(mmc)) {
mmc_host_clk_hold(mmc);
mmc->ios.clock = host->clk_rate;
mmc_set_ios(mmc);
mmc_host_clk_release(mmc);
msmsdcc_ungate_clock(host);
}
mmc_resume_host(mmc);