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| author | Guennadi Liakhovetski <g.liakhovetski@gmx.de> | 2011-03-09 14:45:44 +0100 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2011-03-25 10:39:59 -0400 |
| commit | 5fd0157901d5a8f497f3d3b95cb4beebf1641d1b (patch) | |
| tree | 5604735371eb07f4a579ad66ceab3048f230c81f /drivers/mmc/host/tmio_mmc_pio.c | |
| parent | a7edbe399b40fb82ccd11216fd88d24e428025c5 (diff) | |
| download | kernel_samsung_aries-5fd0157901d5a8f497f3d3b95cb4beebf1641d1b.zip kernel_samsung_aries-5fd0157901d5a8f497f3d3b95cb4beebf1641d1b.tar.gz kernel_samsung_aries-5fd0157901d5a8f497f3d3b95cb4beebf1641d1b.tar.bz2 | |
mmc: tmio: support aggressive clock gating
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/host/tmio_mmc_pio.c')
| -rw-r--r-- | drivers/mmc/host/tmio_mmc_pio.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c index 69772ab..e35e179 100644 --- a/drivers/mmc/host/tmio_mmc_pio.c +++ b/drivers/mmc/host/tmio_mmc_pio.c @@ -747,19 +747,18 @@ static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) tmio_mmc_set_clock(host, ios->clock); /* Power sequence - OFF -> UP -> ON */ - switch (ios->power_mode) { - case MMC_POWER_OFF: /* power down SD bus */ - if (host->set_pwr) + if (ios->power_mode == MMC_POWER_OFF || !ios->clock) { + /* power down SD bus */ + if (ios->power_mode == MMC_POWER_OFF && host->set_pwr) host->set_pwr(host->pdev, 0); tmio_mmc_clk_stop(host); - break; - case MMC_POWER_ON: /* start bus clock */ - tmio_mmc_clk_start(host); - break; - case MMC_POWER_UP: /* power up SD bus */ + } else if (ios->power_mode == MMC_POWER_UP) { + /* power up SD bus */ if (host->set_pwr) host->set_pwr(host->pdev, 1); - break; + } else { + /* start bus clock */ + tmio_mmc_clk_start(host); } switch (ios->bus_width) { |