linux-kernel - [PATCH 1/2] mmc: sdhci: Added set_power sdhci

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Date:	Wed, 22 May 2013 10:47:11 -0700
From:	"Felipe F. Tonello" <eu@...ipetonello.com>
To:	linux-mmc@...r.kernel.org
Cc:	ben-linux@...ff.org, cjb@...top.org, arnd@...db.de,
	linux-kernel@...r.kernel.org,
	"Felipe F. Tonello" <eu@...ipetonello.com>
Subject: [PATCH 1/2] mmc: sdhci: Added set_power sdhci_ops handler.

From: "Felipe F. Tonello" <eu@...ipetonello.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@...ipetonello.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

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