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From: Michael Grzeschik <m.grzeschik@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH v2 3/5] usb: dwc2: add reset controller dependency for probe via oftree
Date: Thu, 17 Dec 2020 12:07:29 +0100	[thread overview]
Message-ID: <20201217110731.14914-4-m.grzeschik@pengutronix.de> (raw)
In-Reply-To: <20201217110731.14914-1-m.grzeschik@pengutronix.de>

The dwc2 controller is connected to one reset controller which needs to be
triggered before it is able to operate. This patch adds the referenced reset
controller in the devicetree to be used.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
---
 drivers/usb/dwc2/dwc2.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/usb/dwc2/dwc2.c b/drivers/usb/dwc2/dwc2.c
index 13455479ef..6f5127fc3b 100644
--- a/drivers/usb/dwc2/dwc2.c
+++ b/drivers/usb/dwc2/dwc2.c
@@ -12,6 +12,7 @@
 #include <errno.h>
 #include <driver.h>
 #include <linux/clk.h>
+#include <linux/reset.h>
 
 #include "dwc2.h"
 
@@ -61,6 +62,10 @@ static int dwc2_probe(struct device_d *dev)
 	if (ret)
 		goto clk_put;
 
+	ret = device_reset_us(dev, 2);
+	if (ret)
+		goto clk_disable;
+
 	dwc2->phy = phy_optional_get(dev, "usb2-phy");
 	if (IS_ERR(dwc2->phy)) {
 		ret = PTR_ERR(dwc2->phy);
-- 
2.29.2


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  parent reply	other threads:[~2020-12-17 11:07 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-17 11:07 [PATCH v2 0/5] dwc2: improve gadget support Michael Grzeschik
2020-12-17 11:07 ` [PATCH v2 1/5] usb: dwc2: cleanup on error for deferred probing Michael Grzeschik
2020-12-17 11:07 ` [PATCH v2 2/5] usb: dwc2: add clk dependency for probe via oftree Michael Grzeschik
2021-01-06  8:57   ` Sascha Hauer
2021-01-06  9:42   ` [PATCH] fixup! " Michael Grzeschik
2020-12-17 11:07 ` Michael Grzeschik [this message]
2020-12-17 11:07 ` [PATCH v2 4/5] usb: dwc2: update the dr_mode on set_mode callback Michael Grzeschik
2020-12-17 11:07 ` [PATCH v2 5/5] usb: dwc2: add support to force gadget mode Michael Grzeschik
2020-12-17 11:39 ` [PATCH v2 0/5] dwc2: improve gadget support Jules Maselbas
2021-01-06 10:00 ` Sascha Hauer

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