[5.0,063/123] crypto: ccree - pm resume first enable the source clk

Message ID 20190520115248.994423542@linuxfoundation.org
State New
Headers show
Series
  • Untitled series #20465
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Commit Message

Greg KH May 20, 2019, 12:14 p.m.
From: Ofir Drang <ofir.drang@arm.com>


commit 7766dd774d80463cec7b81d90c8672af91de2da1 upstream.

On power management resume function first enable the device clk source
to allow access to the device registers.

Signed-off-by: Ofir Drang <ofir.drang@arm.com>

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>

Cc: stable@vger.kernel.org # v4.19+
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>


---
 drivers/crypto/ccree/cc_pm.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

Patch

--- a/drivers/crypto/ccree/cc_pm.c
+++ b/drivers/crypto/ccree/cc_pm.c
@@ -42,14 +42,15 @@  int cc_pm_resume(struct device *dev)
 	struct cc_drvdata *drvdata = dev_get_drvdata(dev);
 
 	dev_dbg(dev, "unset HOST_POWER_DOWN_EN\n");
-	cc_iowrite(drvdata, CC_REG(HOST_POWER_DOWN_EN), POWER_DOWN_DISABLE);
-
+	/* Enables the device source clk */
 	rc = cc_clk_on(drvdata);
 	if (rc) {
 		dev_err(dev, "failed getting clock back on. We're toast.\n");
 		return rc;
 	}
 
+	cc_iowrite(drvdata, CC_REG(HOST_POWER_DOWN_EN), POWER_DOWN_DISABLE);
+
 	rc = init_cc_regs(drvdata, false);
 	if (rc) {
 		dev_err(dev, "init_cc_regs (%x)\n", rc);