sdio client may be required power on/off dynamically.
With regulator vsdio, sdio client power on/off could be executed by mmc_power_up/down
CC: Ohad Ben-Cohen <ohad@xxxxxxxxxx>
Signed-off-by: Zhangfei Gao <zhangfei.gao@xxxxxxxxxxx>
---
drivers/mmc/host/sdhci.c | 22 ++++++++++++++++++++++
include/linux/mmc/sdhci.h | 2 ++
2 files changed, 24 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 0e02cc1..e0ef7d3 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1424,6 +1424,18 @@ static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
out:
mmiowb();
spin_unlock_irqrestore(&host->lock, flags);
+
+ if (host->vsdio) {
+ if (ios->power_mode != host->power_mode_old) {
+ if (ios->power_mode == MMC_POWER_OFF)
+ regulator_disable(host->vsdio);
+
+ if (ios->power_mode == MMC_POWER_UP)
+ regulator_enable(host->vsdio);
+ }
+
+ host->power_mode_old = ios->power_mode;
+ }
}
static int check_ro(struct sdhci_host *host)
@@ -2748,6 +2760,13 @@ int sdhci_add_host(struct sdhci_host *host)
regulator_enable(host->vmmc);
}
+ host->vsdio = regulator_get(mmc_dev(mmc), "vsdio");
+ if (IS_ERR(host->vsdio))
+ host->vsdio = NULL;
+ else
+ printk(KERN_INFO "%s: vsdio regulator found\n",
+ mmc_hostname(mmc));
+
sdhci_init(host, 0);
#ifdef CONFIG_MMC_DEBUG
@@ -2839,6 +2858,9 @@ void sdhci_remove_host(struct sdhci_host *host, int dead)
regulator_put(host->vmmc);
}
+ if (host->vsdio)
+ regulator_put(host->vsdio);
+
kfree(host->adma_desc);
kfree(host->align_buffer);
diff --git a/include/linux/mmc/sdhci.h b/include/linux/mmc/sdhci.h
index 5666f3a..201207a 100644
--- a/include/linux/mmc/sdhci.h
+++ b/include/linux/mmc/sdhci.h
@@ -94,6 +94,8 @@ struct sdhci_host {
const struct sdhci_ops *ops; /* Low level hw interface */
struct regulator *vmmc; /* Power regulator */
+ struct regulator *vsdio; /* sdio Power regulator */
+ unsigned char power_mode_old; /* power supply mode */
/* Internal data */
struct mmc_host *mmc; /* MMC structure */
--
1.7.0.4
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