From: Hans de Goede <hdegoede@redhat.com>
To: Darren Hart <dvhart@infradead.org>,
Andy Shevchenko <andy@infradead.org>,
MyungJoo Ham <myungjoo.ham@samsung.com>,
Chanwoo Choi <cw00.choi@samsung.com>,
Mathias Nyman <mathias.nyman@intel.com>,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Guenter Roeck <linux@roeck-us.net>
Cc: Hans de Goede <hdegoede@redhat.com>,
platform-driver-x86@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org,
Mathias Nyman <mathias.nyman@linux.intel.com>
Subject: [PATCH v6 07/12] xhci: Add option to get next extended capability in list by passing id = 0
Date: Fri, 2 Mar 2018 11:20:52 +0100 [thread overview]
Message-ID: <20180302102057.8917-8-hdegoede@redhat.com> (raw)
In-Reply-To: <20180302102057.8917-1-hdegoede@redhat.com>
From: Mathias Nyman <mathias.nyman@linux.intel.com>
Modify xhci_find_next_ext_cap(base, offset, id) to return the next
capability offset if 0 is passed for id. Otherwise it will behave as
previously and return the offset of the next capability with matching id
capability id 0 is not used by xHCI (reserved)
This is useful when we want to loop through all capabilities.
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
Changes in v4:
-Add Andy's Reviewed-by
Changes in v2:
-Added Heikki's Reviewed-by
---
drivers/usb/host/xhci-ext-caps.h | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/host/xhci-ext-caps.h b/drivers/usb/host/xhci-ext-caps.h
index bf7316e130d3..631e7cc62604 100644
--- a/drivers/usb/host/xhci-ext-caps.h
+++ b/drivers/usb/host/xhci-ext-caps.h
@@ -84,7 +84,8 @@
* @base PCI MMIO registers base address.
* @start address at which to start looking, (0 or HCC_PARAMS to start at
* beginning of list)
- * @id Extended capability ID to search for.
+ * @id Extended capability ID to search for, or 0 for the next
+ * capability
*
* Returns the offset of the next matching extended capability structure.
* Some capabilities can occur several times, e.g., the XHCI_EXT_CAPS_PROTOCOL,
@@ -110,7 +111,7 @@ static inline int xhci_find_next_ext_cap(void __iomem *base, u32 start, int id)
val = readl(base + offset);
if (val == ~0)
return 0;
- if (XHCI_EXT_CAPS_ID(val) == id && offset != start)
+ if (offset != start && (id == 0 || XHCI_EXT_CAPS_ID(val) == id))
return offset;
next = XHCI_EXT_CAPS_NEXT(val);
--
2.14.3
next prev parent reply other threads:[~2018-03-02 10:20 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-02 10:20 [PATCH v6 00/12] USB Type-C device-connection, mux and switch support Hans de Goede
2018-03-02 10:20 ` [PATCH v6 01/12] drivers: base: Unified device connection lookup Hans de Goede
2018-03-09 17:53 ` Greg Kroah-Hartman
2018-03-11 18:24 ` Hans de Goede
2018-03-12 8:13 ` Heikki Krogerus
2018-03-12 9:19 ` Hans de Goede
2018-03-12 9:24 ` Heikki Krogerus
2018-03-02 10:20 ` [PATCH v6 02/12] usb: typec: Start using ERR_PTR Hans de Goede
2018-03-02 10:20 ` [PATCH v6 03/12] usb: typec: API for controlling USB Type-C Multiplexers Hans de Goede
2018-03-02 10:20 ` [PATCH v6 04/12] usb: common: Small class for USB role switches Hans de Goede
2018-03-02 10:20 ` [PATCH v6 05/12] usb: typec: tcpm: Set USB role switch to device mode when configured as such Hans de Goede
2018-03-02 10:20 ` [PATCH v6 06/12] usb: typec: tcpm: Use new Type-C switch/mux and usb-role-switch functions Hans de Goede
2018-03-02 10:20 ` Hans de Goede [this message]
2018-03-02 10:20 ` [PATCH v6 08/12] xhci: Add Intel extended cap / otg phy mux handling Hans de Goede
2018-03-02 10:20 ` [PATCH v6 09/12] usb: roles: Add Intel xHCI USB role switch driver Hans de Goede
2018-03-02 10:20 ` [PATCH v6 10/12] usb: typec: driver for Pericom PI3USB30532 Type-C cross switch Hans de Goede
2018-03-02 10:20 ` [PATCH v6 11/12] platform/x86: intel_cht_int33fe: Add device connections for the Type-C port Hans de Goede
2018-03-02 10:20 ` [PATCH v6 12/12] extcon: axp288: Set USB role where necessary Hans de Goede
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180302102057.8917-8-hdegoede@redhat.com \
--to=hdegoede@redhat.com \
--cc=andy@infradead.org \
--cc=cw00.choi@samsung.com \
--cc=dvhart@infradead.org \
--cc=gregkh@linuxfoundation.org \
--cc=heikki.krogerus@linux.intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-usb@vger.kernel.org \
--cc=linux@roeck-us.net \
--cc=mathias.nyman@intel.com \
--cc=mathias.nyman@linux.intel.com \
--cc=myungjoo.ham@samsung.com \
--cc=platform-driver-x86@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).