forked from Minki/linux
mmc: msm_sdcc: Featurize busclock power save and disable it by default
Signed-off-by: San Mehat <san@google.com> Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
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c7fc9370df
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@ -48,6 +48,7 @@
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#define DRIVER_NAME "msm-sdcc"
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#define BUSCLK_PWRSAVE 0
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#define BUSCLK_TIMEOUT (HZ)
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static unsigned int msmsdcc_fmin = 144000;
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static unsigned int msmsdcc_fmax = 50000000;
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@ -65,6 +66,8 @@ msmsdcc_disable_clocks(struct msmsdcc_host *host, int deferr)
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{
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WARN_ON(!host->clks_on);
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BUG_ON(host->curr.mrq);
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if (deferr) {
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mod_timer(&host->busclk_timer, jiffies + BUSCLK_TIMEOUT);
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} else {
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@ -131,7 +134,9 @@ msmsdcc_request_end(struct msmsdcc_host *host, struct mmc_request *mrq)
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if (mrq->cmd->error == -ETIMEDOUT)
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mdelay(5);
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#if BUSCLK_PWRSAVE
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msmsdcc_disable_clocks(host, 1);
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#endif
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/*
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* Need to drop the host lock here; mmc_request_done may call
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* back into the driver...
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@ -257,7 +262,9 @@ msmsdcc_dma_complete_func(struct msm_dmov_cmd *cmd,
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mrq->data->bytes_xfered = host->curr.data_xfered;
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spin_unlock_irqrestore(&host->lock, flags);
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#if BUSCLK_PWRSAVE
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msmsdcc_disable_clocks(host, 1);
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#endif
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mmc_request_done(host->mmc, mrq);
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return;
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} else
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@ -934,7 +941,9 @@ msmsdcc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
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host->pwr = pwr;
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msmsdcc_writel(host, pwr, MMCIPOWER);
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}
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#if BUSCLK_PWRSAVE
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msmsdcc_disable_clocks(host, 1);
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#endif
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spin_unlock_irqrestore(&host->lock, flags);
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}
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@ -1279,7 +1288,9 @@ msmsdcc_probe(struct platform_device *pdev)
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if (host->timer.function)
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pr_info("%s: Polling status mode enabled\n", mmc_hostname(mmc));
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#if BUSCLK_PWRSAVE
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msmsdcc_disable_clocks(host, 1);
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#endif
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return 0;
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cmd_irq_free:
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free_irq(cmd_irqres->start, host);
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@ -1341,7 +1352,9 @@ msmsdcc_resume(struct platform_device *dev)
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mmc_resume_host(mmc);
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if (host->stat_irq)
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enable_irq(host->stat_irq);
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#if BUSCLK_PWRSAVE
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msmsdcc_disable_clocks(host, 1);
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#endif
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}
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return 0;
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}
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