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From: Baolin Wang <baolin.wang@linaro.org>
To: myungjoo.ham@samsung.com, cw00.choi@samsung.com
Cc: linux-kernel@vger.kernel.org, linaro-kernel@lists.linaro.org,
	baolin.wang@linaro.org, broonie@kernel.org, neilb@suse.com
Subject: [PATCH] extcon: Add documentation for EXTCON_CHG_USB_SLOW/FAST
Date: Tue,  3 Jan 2017 13:50:54 +0800	[thread overview]
Message-ID: <f18aa3ab2fb1182c96ecfe46551cd9c0b5787baf.1483422329.git.baolin.wang@linaro.org> (raw)

Currently there are no documentation for EXTCON_CHG_USB_SLOW/FAST
charger connector. These names don't mean much and no guide to tell
users how to use it, thus try to add documentation to make them clear.

Suggested-by: NeilBrown <neilb@suse.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
---
 include/linux/extcon.h |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/extcon.h b/include/linux/extcon.h
index 0020123..ceec1f0 100644
--- a/include/linux/extcon.h
+++ b/include/linux/extcon.h
@@ -53,6 +53,10 @@
  * 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 would normally appear with EXTCON_USB_HOST.
+ *
+ * A cable of type EXTCON_CHG_USB_SLOW can provide at least 500mA of
+ * current at 5V. A cable of type EXTCON_CHG_USB_FAST can provide at
+ * least 1A of current at 5V.
  */
 #define EXTCON_CHG_USB_SDP	5	/* Standard Downstream Port */
 #define EXTCON_CHG_USB_DCP	6	/* Dedicated Charging Port */
-- 
1.7.9.5

             reply	other threads:[~2017-01-03  5:51 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20170103055156epcas2p4dc48ae31a3d0911ec7aee1a2872e46af@epcas2p4.samsung.com>
2017-01-03  5:50 ` Baolin Wang [this message]
2017-01-03 12:48   ` [PATCH] extcon: Add documentation for EXTCON_CHG_USB_SLOW/FAST Chanwoo Choi
2017-01-03 23:01     ` NeilBrown
2017-01-06  8:50       ` Chanwoo Choi
2017-01-06  8:55   ` Chanwoo Choi

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