From: Ezequiel García <ezequiel@vanguardiasur.com.ar>
Date: Wed, 4 Nov 2015 16:13:46 +0000 (-0300)
Subject: mtd: pxa3xx_nand: Gate/ungate the NAND clock in suspend/resume paths
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=d55d31a6b8f65bb13e1912043a66295cc928967c;p=deliverable%2Flinux.git

mtd: pxa3xx_nand: Gate/ungate the NAND clock in suspend/resume paths

The NAND clock can be disabled on suspend and enabled on resume.

Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
---

diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index 2f337eaef155..2bb9732a42f8 100644
--- a/drivers/mtd/nand/pxa3xx_nand.c
+++ b/drivers/mtd/nand/pxa3xx_nand.c
@@ -1936,12 +1936,18 @@ static int pxa3xx_nand_suspend(struct device *dev)
 		return -EAGAIN;
 	}
 
+	clk_disable(info->clk);
 	return 0;
 }
 
 static int pxa3xx_nand_resume(struct device *dev)
 {
 	struct pxa3xx_nand_info *info = dev_get_drvdata(dev);
+	int ret;
+
+	ret = clk_enable(info->clk);
+	if (ret < 0)
+		return ret;
 
 	/* We don't want to handle interrupt without calling mtd routine */
 	disable_int(info, NDCR_INT_MASK);