[PATCH 1/2] mmc: sdhci: Added set_power sdhci_ops handler.

Felipe F. Tonello
2013-05-22T17:48:11Z

From: "Felipe F. Tonello" <eu@felipetonello.com>

This is useful for power managment purposes if a sdhci child host wants to
turn off some other peripheral also.

Signed-off-by: Felipe F. Tonello <eu@felipetonello.com>
---
drivers/mmc/host/sdhci.c | 8 ++++++++
drivers/mmc/host/sdhci.h | 1 +
2 files changed, 9 insertions(+)

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 2ea429c..0a026c6 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1244,6 +1244,10 @@ static int sdhci_set_power(struct sdhci_host *host, unsigned short power)
u8 pwr = 0;

if (power != (unsigned short)-1) {
+
+ if (host->ops->set_power)
+ host->ops->set_power(host, true);
+
switch (1 << power) {
case MMC_VDD_165_195:
pwr = SDHCI_POWER_180;
@@ -1259,6 +1263,10 @@ static int sdhci_set_power(struct sdhci_host *host, unsigned short power)
default:
BUG();
}
+ } else {
+
+ if (host->ops->set_power)
+ host->ops->set_power(host, false);
}

if (host->pwr == pwr)
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 379e09d..293d56d 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -294,6 +294,7 @@ struct sdhci_ops {
void (*platform_resume)(struct sdhci_host *host);
void (*adma_workaround)(struct sdhci_host *host, u32 intmask);
void (*platform_init)(struct sdhci_host *host);
+ void (*set_power)(struct sdhci_host *host, bool power);
};

#ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
--
1.8.1.4