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From: Amelie Delaunay <amelie.delaunay@foss.st.com>
To: Kishon Vijay Abraham I <kishon@ti.com>,
	Vinod Koul <vkoul@kernel.org>, Rob Herring <robh+dt@kernel.org>,
	Alexandre Torgue <alexandre.torgue@foss.st.com>,
	Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: <linux-phy@lists.infradead.org>, <linux-kernel@vger.kernel.org>,
	<devicetree@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-stm32@st-md-mailman.stormreply.com>,
	Amelie Delaunay <amelie.delaunay@foss.st.com>
Subject: [PATCH v2 1/3] phy: stm32: restore utmi switch on resume
Date: Tue, 5 Oct 2021 17:24:51 +0200	[thread overview]
Message-ID: <20211005152453.89330-2-amelie.delaunay@foss.st.com> (raw)
In-Reply-To: <20211005152453.89330-1-amelie.delaunay@foss.st.com>

UTMI switch value can be lost during suspend/resume, depending on the power
state reached.
This patch adds resume function to usbphyc, to reconfigure utmi switch
after suspend.

Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com>
---
 drivers/phy/st/phy-stm32-usbphyc.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/phy/st/phy-stm32-usbphyc.c b/drivers/phy/st/phy-stm32-usbphyc.c
index 937a14fa7448..083593aea53a 100644
--- a/drivers/phy/st/phy-stm32-usbphyc.c
+++ b/drivers/phy/st/phy-stm32-usbphyc.c
@@ -598,6 +598,18 @@ static int stm32_usbphyc_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static int __maybe_unused stm32_usbphyc_resume(struct device *dev)
+{
+	struct stm32_usbphyc *usbphyc = dev_get_drvdata(dev);
+
+	if (usbphyc->switch_setup >= 0)
+		stm32_usbphyc_switch_setup(usbphyc, usbphyc->switch_setup);
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(stm32_usbphyc_pm_ops, NULL, stm32_usbphyc_resume);
+
 static const struct of_device_id stm32_usbphyc_of_match[] = {
 	{ .compatible = "st,stm32mp1-usbphyc", },
 	{ },
@@ -610,6 +622,7 @@ static struct platform_driver stm32_usbphyc_driver = {
 	.driver = {
 		.of_match_table = stm32_usbphyc_of_match,
 		.name = "stm32-usbphyc",
+		.pm = &stm32_usbphyc_pm_ops,
 	}
 };
 module_platform_driver(stm32_usbphyc_driver);
-- 
2.25.1


  reply	other threads:[~2021-10-05 15:25 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-05 15:24 [PATCH v2 0/3] phy: stm32: add phy tuning support Amelie Delaunay
2021-10-05 15:24 ` Amelie Delaunay [this message]
2021-10-05 15:24 ` [PATCH v2 2/3] dt-bindings: phy: phy-stm32-usbphyc: add optional phy tuning properties Amelie Delaunay
2021-10-05 22:45   ` Rob Herring
2021-10-06  6:51     ` Amelie DELAUNAY
2021-10-06 12:38       ` Rob Herring
2021-10-06 12:58         ` Amelie DELAUNAY
2021-10-14 18:16           ` Rob Herring
2021-10-15  9:10             ` Amelie DELAUNAY
2021-10-14 17:26   ` Rob Herring
2021-10-05 15:24 ` [PATCH v2 3/3] phy: stm32: add phy tuning support Amelie Delaunay

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