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);