linux-kernel - [PATCH v10 14/33] crypto: rockchip: handle reset also in PM

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Message-Id: <20220927075511.3147847-15-clabbe@baylibre.com>
Date:   Tue, 27 Sep 2022 07:54:52 +0000
From:   Corentin Labbe <clabbe@...libre.com>
To:     heiko@...ech.de, ardb@...nel.org, davem@...emloft.net,
        herbert@...dor.apana.org.au, krzysztof.kozlowski+dt@...aro.org,
        mturquette@...libre.com, robh+dt@...nel.org, sboyd@...nel.org
Cc:     linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-crypto@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        Corentin Labbe <clabbe@...libre.com>
Subject: [PATCH v10 14/33] crypto: rockchip: handle reset also in PM

reset could be handled by PM functions.
We keep the initial reset pulse to be sure the hw is a know device state
after probe.

Signed-off-by: Corentin Labbe <clabbe@...libre.com>
---
 drivers/crypto/rockchip/rk3288_crypto.c | 22 ++++++++++------------
 1 file changed, 10 insertions(+), 12 deletions(-)

diff --git a/drivers/crypto/rockchip/rk3288_crypto.c b/drivers/crypto/rockchip/rk3288_crypto.c
index d9258b9e71b3..399829ef92e0 100644
--- a/drivers/crypto/rockchip/rk3288_crypto.c
+++ b/drivers/crypto/rockchip/rk3288_crypto.c
@@ -74,14 +74,23 @@ static int rk_crypto_pm_suspend(struct device *dev)
 	struct rk_crypto_info *rkdev = dev_get_drvdata(dev);
 
 	rk_crypto_disable_clk(rkdev);
+	reset_control_assert(rkdev->rst);
+
 	return 0;
 }
 
 static int rk_crypto_pm_resume(struct device *dev)
 {
 	struct rk_crypto_info *rkdev = dev_get_drvdata(dev);
+	int ret;
+
+	ret = rk_crypto_enable_clk(rkdev);
+	if (ret)
+		return ret;
+
+	reset_control_deassert(rkdev->rst);
+	return 0;
 
-	return rk_crypto_enable_clk(rkdev);
 }
 
 static const struct dev_pm_ops rk_crypto_pm_ops = {
@@ -222,13 +231,6 @@ static void rk_crypto_unregister(void)
 	}
 }
 
-static void rk_crypto_action(void *data)
-{
-	struct rk_crypto_info *crypto_info = data;
-
-	reset_control_assert(crypto_info->rst);
-}
-
 static const struct of_device_id crypto_of_id_table[] = {
 	{ .compatible = "rockchip,rk3288-crypto" },
 	{}
@@ -258,10 +260,6 @@ static int rk_crypto_probe(struct platform_device *pdev)
 	usleep_range(10, 20);
 	reset_control_deassert(crypto_info->rst);
 
-	err = devm_add_action_or_reset(dev, rk_crypto_action, crypto_info);
-	if (err)
-		goto err_crypto;
-
 	crypto_info->reg = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(crypto_info->reg)) {
 		err = PTR_ERR(crypto_info->reg);
-- 
2.35.1