From e84e3e99256e2aedab5f45f8e02bc98c891b9188 Mon Sep 17 00:00:00 2001
From: Chunfeng Yun <chunfeng.yun@mediatek.com>
Date: Mon, 23 May 2022 17:04:49 +0800
Subject: usb: mtu3: add support controller reset
Add support controller reset via a reset-controller usually in infracfg,
it's different with the software reset by IPPC which only used to reset MAC,
and it will also reset IPPC meanwhile.
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/20220523090449.14430-4-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/mtu3/mtu3_plat.c | 7 +++++++
1 file changed, 7 insertions(+)
(limited to 'drivers/usb')
diff --git a/drivers/usb/mtu3/mtu3_plat.c b/drivers/usb/mtu3/mtu3_plat.c
index 4309ed939178..d14494b30064 100644
--- a/drivers/usb/mtu3/mtu3_plat.c
+++ b/drivers/usb/mtu3/mtu3_plat.c
@@ -13,6 +13,7 @@
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/pm_wakeirq.h>
+#include <linux/reset.h>
#include "mtu3.h"
#include "mtu3_dr.h"
@@ -345,6 +346,12 @@ static int mtu3_probe(struct platform_device *pdev)
dev_info(dev, "wakeup irq %d\n", ssusb->wakeup_irq);
}
+ ret = device_reset_optional(dev);
+ if (ret) {
+ dev_err_probe(dev, ret, "failed to reset controller\n");
+ goto comm_exit;
+ }
+
ssusb_ip_sw_reset(ssusb);
if (IS_ENABLED(CONFIG_USB_MTU3_HOST))
--
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