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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>
This commit is contained in:
Guennadi Liakhovetski 2011-03-09 14:45:44 +01:00 committed by Chris Ball
parent a7edbe399b
commit 5fd0157901
1 changed files with 8 additions and 9 deletions
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17
drivers/mmc/host/tmio_mmc_pio.c
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@ -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) {