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authorAdrian Hunter <adrian.hunter@intel.com>2011-12-27 15:48:41 +0200
committerChris Ball <cjb@laptop.org>2012-01-11 23:58:47 -0500
commitceb6143b2df81c8a554bd5de898087926568cc51 (patch)
treed424e582d5d8ea0e350a30e0c4516345b86950ce /drivers/mmc
parent17e9ff559a7dbb7a6df332007d2ffcd3e7d83fba (diff)
downloadop-kernel-dev-ceb6143b2df81c8a554bd5de898087926568cc51.zip
op-kernel-dev-ceb6143b2df81c8a554bd5de898087926568cc51.tar.gz
mmc: sdhci: fix vmmc handling
Presently the vmmc regulator is enabled when the host controller is added and disabled when it is removed. However, the vmmc regulator should be under the control of the upper layers via ->set_ios(). Make it so. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/sdhci.c43
1 files changed, 21 insertions, 22 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index ab6018fc..6a35d03 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1170,7 +1170,7 @@ out:
host->clock = clock;
}
-static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
+static int sdhci_set_power(struct sdhci_host *host, unsigned short power)
{
u8 pwr = 0;
@@ -1193,13 +1193,13 @@ static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
}
if (host->pwr == pwr)
- return;
+ return -1;
host->pwr = pwr;
if (pwr == 0) {
sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
- return;
+ return 0;
}
/*
@@ -1226,6 +1226,8 @@ static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
*/
if (host->quirks & SDHCI_QUIRK_DELAY_AFTER_POWER)
mdelay(10);
+
+ return power;
}
/*****************************************************************************\
@@ -1307,12 +1309,17 @@ static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
static void sdhci_do_set_ios(struct sdhci_host *host, struct mmc_ios *ios)
{
unsigned long flags;
+ int vdd_bit = -1;
u8 ctrl;
spin_lock_irqsave(&host->lock, flags);
- if (host->flags & SDHCI_DEVICE_DEAD)
- goto out;
+ if (host->flags & SDHCI_DEVICE_DEAD) {
+ spin_unlock_irqrestore(&host->lock, flags);
+ if (host->vmmc && ios->power_mode == MMC_POWER_OFF)
+ mmc_regulator_set_ocr(host->mmc, host->vmmc, 0);
+ return;
+ }
/*
* Reset the chip on each power off.
@@ -1326,9 +1333,15 @@ static void sdhci_do_set_ios(struct sdhci_host *host, struct mmc_ios *ios)
sdhci_set_clock(host, ios->clock);
if (ios->power_mode == MMC_POWER_OFF)
- sdhci_set_power(host, -1);
+ vdd_bit = sdhci_set_power(host, -1);
else
- sdhci_set_power(host, ios->vdd);
+ vdd_bit = sdhci_set_power(host, ios->vdd);
+
+ if (host->vmmc && vdd_bit != -1) {
+ spin_unlock_irqrestore(&host->lock, flags);
+ mmc_regulator_set_ocr(host->mmc, host->vmmc, vdd_bit);
+ spin_lock_irqsave(&host->lock, flags);
+ }
if (host->ops->platform_send_init_74_clocks)
host->ops->platform_send_init_74_clocks(host, ios->power_mode);
@@ -1453,7 +1466,6 @@ static void sdhci_do_set_ios(struct sdhci_host *host, struct mmc_ios *ios)
if(host->quirks & SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS)
sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
-out:
mmiowb();
spin_unlock_irqrestore(&host->lock, flags);
}
@@ -2357,9 +2369,6 @@ int sdhci_suspend_host(struct sdhci_host *host)
free_irq(host->irq, host);
- if (host->vmmc)
- ret = regulator_disable(host->vmmc);
-
return ret;
}
@@ -2369,12 +2378,6 @@ int sdhci_resume_host(struct sdhci_host *host)
{
int ret;
- if (host->vmmc) {
- int ret = regulator_enable(host->vmmc);
- if (ret)
- return ret;
- }
-
if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
if (host->ops->enable_dma)
host->ops->enable_dma(host);
@@ -2936,8 +2939,6 @@ int sdhci_add_host(struct sdhci_host *host)
if (IS_ERR(host->vmmc)) {
pr_info("%s: no vmmc regulator found\n", mmc_hostname(mmc));
host->vmmc = NULL;
- } else {
- regulator_enable(host->vmmc);
}
sdhci_init(host, 0);
@@ -3026,10 +3027,8 @@ void sdhci_remove_host(struct sdhci_host *host, int dead)
tasklet_kill(&host->card_tasklet);
tasklet_kill(&host->finish_tasklet);
- if (host->vmmc) {
- regulator_disable(host->vmmc);
+ if (host->vmmc)
regulator_put(host->vmmc);
- }
kfree(host->adma_desc);
kfree(host->align_buffer);
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