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

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Gitweb:     http://git.infradead.org/?p=mtd-2.6.git;a=commit;h=d55d31a6b8f65bb13e1912043a66295cc928967c
Commit:     d55d31a6b8f65bb13e1912043a66295cc928967c
Parent:     f3028c840867d2235886a6a5c97865fc9d91bafd
Author:     Ezequiel García <ezequiel at vanguardiasur.com.ar>
AuthorDate: Wed Nov 4 13:13:46 2015 -0300
Committer:  Brian Norris <computersforpeace at gmail.com>
CommitDate: Mon Nov 16 15:03:32 2015 -0800

    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 at vanguardiasur.com.ar>
    Acked-by: Robert Jarzmik <robert.jarzmik at free.fr>
    Signed-off-by: Brian Norris <computersforpeace at gmail.com>
---
 drivers/mtd/nand/pxa3xx_nand.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index 2f337ea..2bb9732 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);