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path: root/drivers/mtd/nand/orion_nand.c
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Diffstat (limited to 'drivers/mtd/nand/orion_nand.c')
-rw-r--r--drivers/mtd/nand/orion_nand.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/mtd/nand/orion_nand.c b/drivers/mtd/nand/orion_nand.c
index 0f50ef38b87b..513dc88a05ca 100644
--- a/drivers/mtd/nand/orion_nand.c
+++ b/drivers/mtd/nand/orion_nand.c
@@ -17,6 +17,8 @@
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>
+#include <linux/clk.h>
+#include <linux/err.h>
#include <asm/io.h>
#include <asm/sizes.h>
#include <mach/hardware.h>
@@ -79,6 +81,7 @@ static int __init orion_nand_probe(struct platform_device *pdev)
struct nand_chip *nc;
struct orion_nand_data *board;
struct resource *res;
+ struct clk *clk;
void __iomem *io_base;
int ret = 0;
u32 val = 0;
@@ -155,6 +158,14 @@ static int __init orion_nand_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, mtd);
+ /* Not all platforms can gate the clock, so it is not
+ an error if the clock does not exists. */
+ clk = clk_get(&pdev->dev, NULL);
+ if (!IS_ERR(clk)) {
+ clk_prepare_enable(clk);
+ clk_put(clk);
+ }
+
if (nand_scan(mtd, 1)) {
ret = -ENXIO;
goto no_dev;
@@ -184,6 +195,7 @@ static int __devexit orion_nand_remove(struct platform_device *pdev)
{
struct mtd_info *mtd = platform_get_drvdata(pdev);
struct nand_chip *nc = mtd->priv;
+ struct clk *clk;
nand_release(mtd);
@@ -191,6 +203,12 @@ static int __devexit orion_nand_remove(struct platform_device *pdev)
kfree(nc);
+ clk = clk_get(&pdev->dev, NULL);
+ if (!IS_ERR(clk)) {
+ clk_disable_unprepare(clk);
+ clk_put(clk);
+ }
+
return 0;
}