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From: Baolin Wang <baolin.wang@linaro.org>
To: myungjoo.ham@samsung.com, cw00.choi@samsung.com, wens@csie.org,
	kishon@ti.com, heiko@sntech.de
Cc: linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-rockchip@lists.infradead.org,
	linaro-kernel@lists.linaro.org, baolin.wang@linaro.org,
	broonie@kernel.org, neilb@suse.com
Subject: [PATCH 1/3] extcon: Add documentation for EXTCON_CHG_USB_* and EXTCON_USB_*
Date: Wed, 21 Dec 2016 14:10:47 +0800	[thread overview]
Message-ID: <7b9836ce2ca34118a2acd1ea113605a5f13b4439.1482300213.git.baolin.wang@linaro.org> (raw)

Current there is both "EXTCON_USB" and "EXTCON_CHG_USB_SDP" which
both seem to suggest a standard downstream port. But there is no
documentation describing how these relate.

Thus add documentation to describe EXTCON_CHG_USB_SDP should always
appear together with EXTCON_USB, and EXTCON_CHG_USB_ACA would normally
appear with EXTCON_USB_HOST.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
---
 include/linux/extcon.h |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/include/linux/extcon.h b/include/linux/extcon.h
index b871c0c..6498b05 100644
--- a/include/linux/extcon.h
+++ b/include/linux/extcon.h
@@ -46,7 +46,14 @@
 #define EXTCON_USB		1
 #define EXTCON_USB_HOST		2
 
-/* Charging external connector */
+/*
+ * Charging external connector
+ *
+ * When one SDP charger connector was reported, we should also report
+ * the USB connector, which means EXTCON_CHG_USB_SDP should always
+ * appear together with EXTCON_USB. The same as ACA charger connector,
+ * EXTCON_CHG_USB_ACA should always appear with EXTCON_USB_HOST.
+ */
 #define EXTCON_CHG_USB_SDP	5	/* Standard Downstream Port */
 #define EXTCON_CHG_USB_DCP	6	/* Dedicated Charging Port */
 #define EXTCON_CHG_USB_CDP	7	/* Charging Downstream Port */
-- 
1.7.9.5

             reply	other threads:[~2016-12-21  6:11 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20161221061321epcas2p196fd90254d59164e1195840bdd546fa7@epcas2p1.samsung.com>
2016-12-21  6:10 ` Baolin Wang [this message]
2016-12-21  6:10   ` [PATCH 2/3] extcon: axp288: Set EXTCON_USB when EXTCON_CHG_USB_SDP was set Baolin Wang
2016-12-21  7:22     ` Chanwoo Choi
2016-12-21  7:55       ` Baolin Wang
2016-12-21  7:59         ` Chanwoo Choi
2016-12-21  6:10   ` [PATCH 3/3] phy: rockchip-inno-usb2: " Baolin Wang
2016-12-21  7:29     ` Chanwoo Choi
2016-12-21  7:57       ` Baolin Wang
2016-12-21  7:20   ` [PATCH 1/3] extcon: Add documentation for EXTCON_CHG_USB_* and EXTCON_USB_* Chanwoo Choi
2016-12-21  7:53     ` Baolin Wang
2016-12-21  7:58       ` Chanwoo Choi
2016-12-21  7:59         ` Baolin Wang

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