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ARM: Orion: CESA: Add support for clk

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Some orion platforms support gating of the clock. If the clock exists
enable/disbale 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 11:56:19 +01:00 • committed by Mike Turquette
commit 1f80b126d0
2 changed files with 17 additions and 1 deletions
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14
drivers/crypto/mv_cesa.c
View file

@ -16,6 +16,7 @@
#include <linux/scatterlist.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/clk.h>
#include <crypto/internal/hash.h>
#include <crypto/sha.h>
@ -79,6 +80,7 @@ struct crypto_priv {
void __iomem *reg;
void __iomem *sram;
int irq;
struct clk *clk;
struct task_struct *queue_th;
/* the lock protects queue and eng_st */
@ -1053,6 +1055,12 @@ static int mv_probe(struct platform_device *pdev)
if (ret)
goto err_thread;
/* Not all platforms can gate the clock, so it is not
an error if the clock does not exists. */
cp->clk = clk_get(&pdev->dev, NULL);
if (!IS_ERR(cp->clk))
clk_prepare_enable(cp->clk);
writel(SEC_INT_ACCEL0_DONE, cpg->reg + SEC_ACCEL_INT_MASK);
writel(SEC_CFG_STOP_DIG_ERR, cpg->reg + SEC_ACCEL_CFG);
writel(SRAM_CONFIG, cpg->reg + SEC_ACCEL_DESC_P0);
@ -1118,6 +1126,12 @@ static int mv_remove(struct platform_device *pdev)
memset(cp->sram, 0, cp->sram_size);
iounmap(cp->sram);
iounmap(cp->reg);
if (!IS_ERR(cp->clk)) {
clk_disable_unprepare(cp->clk);
clk_put(cp->clk);
}
kfree(cp);
cpg = NULL;
return 0;