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| author | San Mehat <san@google.com> | 2009-11-23 15:36:31 -0800 |
|---|---|---|
| committer | Daniel Walker <dwalker@codeaurora.org> | 2010-03-18 13:37:16 -0700 |
| commit | f4748499d3dc5e7cadecb977f0d4f1f4f4a8d8c5 (patch) | |
| tree | 92c72d2b309e67f12b8d0ad7516fa92efb3c2477 /drivers/mmc | |
| parent | c7fc9370df1433486dfa9460a833fae664e8be6c (diff) | |
| download | linux-f4748499d3dc5e7cadecb977f0d4f1f4f4a8d8c5.tar.gz linux-f4748499d3dc5e7cadecb977f0d4f1f4f4a8d8c5.tar.bz2 linux-f4748499d3dc5e7cadecb977f0d4f1f4f4a8d8c5.zip | |
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>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/msm_sdcc.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/mmc/host/msm_sdcc.c b/drivers/mmc/host/msm_sdcc.c index 591ef3c4e9a7..bdafb642a713 100644 --- a/drivers/mmc/host/msm_sdcc.c +++ b/drivers/mmc/host/msm_sdcc.c @@ -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; } |