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Subject[PATCH 5.1 066/128] crypto: ccree - HOST_POWER_DOWN_EN should be the last CC access during suspend
Date
From: Ofir Drang <ofir.drang@arm.com>

commit 3499efbeed39d114873267683b9e776bcb34b058 upstream.

During power management suspend the driver need to prepare the device
for the power down operation and as a last indication write to the
HOST_POWER_DOWN_EN register which signals to the hardware that
The ccree is ready for power down.

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 | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/crypto/ccree/cc_pm.c
+++ b/drivers/crypto/ccree/cc_pm.c
@@ -25,13 +25,13 @@ int cc_pm_suspend(struct device *dev)
int rc;

dev_dbg(dev, "set HOST_POWER_DOWN_EN\n");
- cc_iowrite(drvdata, CC_REG(HOST_POWER_DOWN_EN), POWER_DOWN_ENABLE);
rc = cc_suspend_req_queue(drvdata);
if (rc) {
dev_err(dev, "cc_suspend_req_queue (%x)\n", rc);
return rc;
}
fini_cc_regs(drvdata);
+ cc_iowrite(drvdata, CC_REG(HOST_POWER_DOWN_EN), POWER_DOWN_ENABLE);
cc_clk_off(drvdata);
return 0;
}

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