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Subject[PATCH 31/35] crypto: ccree: pm resume first enable the source clk
Date
From: Ofir Drang <ofir.drang@arm.com>

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

diff --git a/drivers/crypto/ccree/cc_pm.c b/drivers/crypto/ccree/cc_pm.c
index 6f278a0d8ee6..9a5abe406996 100644
--- 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);
--
2.21.0
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