diff options
| author | Andrew Lunn <andrew@lunn.ch> | 2012-02-19 13:30:26 +0100 |
|---|---|---|
| committer | Mike Turquette <mturquette@linaro.org> | 2012-05-08 16:34:02 -0700 |
| commit | c510182b1c68e2f2bf61e69f6c65bcf61a188809 (patch) | |
| tree | 3617d1484e75974409f2b00d5d0a2f3836943cc3 /drivers/dma | |
| parent | 1f80b126d06cf5c88b7f03a80c79ffd85053688a (diff) | |
| download | lwn-c510182b1c68e2f2bf61e69f6c65bcf61a188809.tar.gz lwn-c510182b1c68e2f2bf61e69f6c65bcf61a188809.zip | |
ARM: Orion: XOR: Add support for clk
Some orion platforms can gate the XOR driver clock. If the clock
exisits, unable/disable it as appropriate.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Jamie Lentin <jm@lentin.co.uk>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/mv_xor.c | 15 | ||||
| -rw-r--r-- | drivers/dma/mv_xor.h | 1 |
2 files changed, 16 insertions, 0 deletions
diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c index fa5d55fea46c..0b12e68bf79c 100644 --- a/drivers/dma/mv_xor.c +++ b/drivers/dma/mv_xor.c @@ -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; } diff --git a/drivers/dma/mv_xor.h b/drivers/dma/mv_xor.h index 654876b7ba1d..a5b422f5a8ab 100644 --- a/drivers/dma/mv_xor.h +++ b/drivers/dma/mv_xor.h @@ -55,6 +55,7 @@ struct mv_xor_shared_private { void __iomem *xor_base; void __iomem *xor_high_base; + struct clk *clk; }; |