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From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: [PATCH 7/8] usb: add fallback ->detect method for USB host drivers
Date: Fri, 29 Jan 2021 17:11:15 +0100	[thread overview]
Message-ID: <20210129161116.9971-7-a.fatoum@pengutronix.de> (raw)
In-Reply-To: <20210129161116.9971-1-a.fatoum@pengutronix.de>

We already maintain a list of USB host controllers, so we can use that
to implement a generic detect callback. Currently, all drivers define
their own, which uses driver-specific means to arrive at the struct
usb_host and then call usb_host_detect().

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 drivers/usb/core/usb.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index ea244d4bcf6c..938a28e030bf 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -88,11 +88,25 @@ static inline void usb_host_release(struct usb_host *host)
 	slice_release(&host->slice);
 }
 
+static int usb_hw_detect(struct device_d *dev)
+{
+	struct usb_host *host;
+
+	list_for_each_entry(host, &host_list, list) {
+		if (dev == host->hw_dev)
+			return usb_host_detect(host);
+	}
+
+	return -ENODEV;
+}
+
 int usb_register_host(struct usb_host *host)
 {
 	list_add_tail(&host->list, &host_list);
 	host->busnum = host_busnum++;
 	slice_init(&host->slice, dev_name(host->hw_dev));
+	if (!host->hw_dev->detect)
+		host->hw_dev->detect = usb_hw_detect;
 	return 0;
 }
 
-- 
2.30.0


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  parent reply	other threads:[~2021-01-29 16:11 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-29 16:11 [PATCH 1/8] commands: usbgadget: remove deprecated s option from help text Ahmad Fatoum
2021-01-29 16:11 ` [PATCH 2/8] asm-generic: define fallback memcpy and memset for device I/O Ahmad Fatoum
2021-02-02 19:03   ` Sascha Hauer
2021-02-02 19:41     ` Ahmad Fatoum
2021-02-04 10:12       ` Sascha Hauer
2021-01-29 16:11 ` [PATCH 3/8] ARM: <asm/io.h>: define macros for I/O memcpy/memset Ahmad Fatoum
2021-01-29 16:11 ` [PATCH 4/8] asm-generic: io.h: remove wrong use of IOMEM Ahmad Fatoum
2021-02-01  8:57   ` Sascha Hauer
2021-02-01  8:59     ` Ahmad Fatoum
2021-01-29 16:11 ` [PATCH 5/8] ppc: <asm/io.h>: remove duplicate definition Ahmad Fatoum
2021-01-29 16:11 ` [PATCH 6/8] printk: port over Linux print_hex_dump_bytes/print_hex_dump_debug Ahmad Fatoum
2021-01-29 16:11 ` Ahmad Fatoum [this message]
2021-01-29 16:11 ` [PATCH 8/8] usb: host: ehci: remove duplicated usb_host_detect() calls Ahmad Fatoum
2021-02-01  9:07 ` [PATCH 1/8] commands: usbgadget: remove deprecated s option from help text Sascha Hauer

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