From: Michael Grzeschik <m.grzeschik@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH 3/5] usb: dwc2: add reset controller dependency for probe via oftree
Date: Wed, 16 Dec 2020 21:45:32 +0100 [thread overview]
Message-ID: <20201216204534.8054-4-m.grzeschik@pengutronix.de> (raw)
In-Reply-To: <20201216204534.8054-1-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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next prev parent reply other threads:[~2020-12-16 20:45 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-16 20:45 [PATCH 0/5] dwc2: improve gadget support Michael Grzeschik
2020-12-16 20:45 ` [PATCH 1/5] usb: dwc2: cleanup on error for deferred probing Michael Grzeschik
2020-12-17 11:00 ` Jules Maselbas
2020-12-16 20:45 ` [PATCH 2/5] usb: dwc2: add clk dependency for probe via oftree Michael Grzeschik
2020-12-16 20:45 ` Michael Grzeschik [this message]
2020-12-16 20:45 ` [PATCH 4/5] usb: dwc2: update the dr_mode on set_mode callback Michael Grzeschik
2020-12-16 20:45 ` [PATCH 5/5] usb: dwc2: add support to force gadget mode Michael Grzeschik
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