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mmc: sh_mmcif: add regulator support

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Add regulator support to the sh_mmcif driver, but also preserve the current
power-callback.

Also note, that the card power is not switched off during clock gating
periods, hence there's no need to power it on every time the card is
re-activated.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Reviwed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Reviewed-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Guennadi Liakhovetski 2012-04-20 18:27:13 +02:00 committed by Chris Ball
parent e2ee996eaa
commit 7d17baa05d
1 changed files with 31 additions and 7 deletions
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38
drivers/mmc/host/sh_mmcif.c
View File

@ -923,10 +923,22 @@ static int sh_mmcif_clk_update(struct sh_mmcif_host *host)
return ret;
}
static void sh_mmcif_set_power(struct sh_mmcif_host *host, struct mmc_ios *ios)
{
struct sh_mmcif_plat_data *pd = host->pd->dev.platform_data;
struct mmc_host *mmc = host->mmc;
if (pd->set_pwr)
pd->set_pwr(host->pd, ios->power_mode != MMC_POWER_OFF);
if (!IS_ERR(mmc->supply.vmmc))
/* Errors ignored... */
mmc_regulator_set_ocr(mmc, mmc->supply.vmmc,
ios->power_mode ? ios->vdd : 0);
}
static void sh_mmcif_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
{
struct sh_mmcif_host *host = mmc_priv(mmc);
struct sh_mmcif_plat_data *p = host->pd->dev.platform_data;
unsigned long flags;
spin_lock_irqsave(&host->lock, flags);
@ -944,6 +956,7 @@ static void sh_mmcif_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
sh_mmcif_request_dma(host, host->pd->dev.platform_data);
host->card_present = true;
}
sh_mmcif_set_power(host, ios);
} else if (ios->power_mode == MMC_POWER_OFF || !ios->clock) {
/* clock stop */
sh_mmcif_clock_control(host, 0);
@ -957,8 +970,8 @@ static void sh_mmcif_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
pm_runtime_put(&host->pd->dev);
clk_disable(host->hclk);
host->power = false;
if (p->set_pwr && ios->power_mode == MMC_POWER_OFF)
p->set_pwr(host->pd, 0);
if (ios->power_mode == MMC_POWER_OFF)
sh_mmcif_set_power(host, ios);
}
host->state = STATE_IDLE;
return;
@ -966,8 +979,6 @@ static void sh_mmcif_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
if (ios->clock) {
if (!host->power) {
if (p->set_pwr)
p->set_pwr(host->pd, ios->power_mode);
sh_mmcif_clk_update(host);
pm_runtime_get_sync(&host->pd->dev);
host->power = true;
@ -1251,6 +1262,19 @@ static void mmcif_timeout_work(struct work_struct *work)
mmc_request_done(host->mmc, mrq);
}
static void sh_mmcif_init_ocr(struct sh_mmcif_host *host)
{
struct sh_mmcif_plat_data *pd = host->pd->dev.platform_data;
struct mmc_host *mmc = host->mmc;
mmc_regulator_get_supply(mmc);
if (!mmc->ocr_avail)
mmc->ocr_avail = pd->ocr;
else if (pd->ocr)
dev_warn(mmc_dev(mmc), "Platform OCR mask is ignored\n");
}
static int __devinit sh_mmcif_probe(struct platform_device *pdev)
{
int ret = 0, irq[2];
@ -1298,8 +1322,8 @@ static int __devinit sh_mmcif_probe(struct platform_device *pdev)
spin_lock_init(&host->lock);
mmc->ops = &sh_mmcif_ops;
if (pd->ocr)
mmc->ocr_avail = pd->ocr;
sh_mmcif_init_ocr(host);
mmc->caps = MMC_CAP_MMC_HIGHSPEED;
if (pd->caps)
mmc->caps |= pd->caps;