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ARM: Orion: XOR: Add support for clk

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Some orion platforms can gate the XOR driver clock. If the clock
exisits, unable/disable it as appropriate.

Signed-off-by: Andrew Lunn <[email protected]>
Tested-by: Jamie Lentin <[email protected]>
Signed-off-by: Mike Turquette <[email protected]>
This commit is contained in:
Andrew Lunn 2012-02-19 13:30:26 +01:00 • committed by Mike Turquette
commit c510182b1c
3 changed files with 21 additions and 5 deletions
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15
drivers/dma/mv_xor.c
View file

@ -25,6 +25,7 @@
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/memory.h>
#include <linux/clk.h>
#include <plat/mv_xor.h>
#include "dmaengine.h"
@ -1307,11 +1308,25 @@ static int mv_xor_shared_probe(struct platform_device *pdev)
if (dram)
mv_xor_conf_mbus_windows(msp, dram);
/* Not all platforms can gate the clock, so it is not
* an error if the clock does not exists.
*/
msp->clk = clk_get(&pdev->dev, NULL);
if (!IS_ERR(msp->clk))
clk_prepare_enable(msp->clk);
return 0;
}
static int mv_xor_shared_remove(struct platform_device *pdev)
{
struct mv_xor_shared_private *msp = platform_get_drvdata(pdev);
if (!IS_ERR(msp->clk)) {
clk_disable_unprepare(msp->clk);
clk_put(msp->clk);
}
return 0;
}

1
drivers/dma/mv_xor.h
View file

@ -55,6 +55,7 @@
struct mv_xor_shared_private {
void __iomem *xor_base;
void __iomem *xor_high_base;
struct clk *clk;
};