linux-kernel - [PATCH 33/35] crypto: ccree: HOST_POWER_DOWN_EN should be the last CC access during suspend

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Message-Id: <20190418133913.9122-34-gilad@benyossef.com>
Date:   Thu, 18 Apr 2019 16:39:08 +0300
From:   Gilad Ben-Yossef <gilad@...yossef.com>
To:     Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>
Cc:     Ofir Drang <ofir.drang@....com>, stable@...r.kernel.org,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 33/35] crypto: ccree: HOST_POWER_DOWN_EN should be the last CC access during suspend

From: Ofir Drang <ofir.drang@....com>

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@....com>
Signed-off-by: Gilad Ben-Yossef <gilad@...yossef.com>
Cc: stable@...r.kernel.org # v4.19+
---
 drivers/crypto/ccree/cc_pm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/crypto/ccree/cc_pm.c b/drivers/crypto/ccree/cc_pm.c
index 9a5abe406996..77025da2dcb6 100644
--- 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;
 }
-- 
2.21.0