From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752128AbeERQYh (ORCPT ); Fri, 18 May 2018 12:24:37 -0400 Received: from gloria.sntech.de ([95.129.55.99]:40620 "EHLO gloria.sntech.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750957AbeERQYa (ORCPT ); Fri, 18 May 2018 12:24:30 -0400 From: Heiko Stuebner To: Lin Huang Cc: seanpaul@chromium.org, airlied@linux.ie, zyw@rock-chips.com, dianders@chromium.org, briannorris@chromium.org, linux-rockchip@lists.infradead.org, daniel.vetter@intel.com, jani.nikula@linux.intel.com, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, eballetbo@gmail.com, robh+dt@kernel.org, devicetree@vger.kernel.org Subject: Re: [PATCH v5 2/4] Documentation: bindings: add phy_config for Rockchip USB Type-C PHY Date: Fri, 18 May 2018 18:24:00 +0200 Message-ID: <2417091.oYeT3lua5n@phil> In-Reply-To: <1526548680-2552-2-git-send-email-hl@rock-chips.com> References: <1526548680-2552-1-git-send-email-hl@rock-chips.com> <1526548680-2552-2-git-send-email-hl@rock-chips.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Am Donnerstag, 17. Mai 2018, 11:17:58 CEST schrieb Lin Huang: > If want to do training outside DP Firmware, need phy voltage swing > and pre_emphasis value. > > Signed-off-by: Lin Huang > --- > Changes in v2: > - None > Changes in v3: > - modify property description and add this property to Example > Change in v4: > - None > Change in v5: > - None > > .../devicetree/bindings/phy/phy-rockchip-typec.txt | 29 +++++++++++++++++++++- > 1 file changed, 28 insertions(+), 1 deletion(-) > > diff --git a/Documentation/devicetree/bindings/phy/phy-rockchip-typec.txt b/Documentation/devicetree/bindings/phy/phy-rockchip-typec.txt > index 960da7f..af298f2 100644 > --- a/Documentation/devicetree/bindings/phy/phy-rockchip-typec.txt > +++ b/Documentation/devicetree/bindings/phy/phy-rockchip-typec.txt > @@ -17,7 +17,8 @@ Required properties: > > Optional properties: > - extcon : extcon specifier for the Power Delivery > - > + - rockchip,phy_config : A list of voltage swing(mv) and pre-emphasis > + (dB) pairs. mv -> mV I'd think. This needs a bit more explanation please. Especially as the multiple "0 0" lines in the examples suggest some deeper ordering requirements. Like the 3 blocks of 4 entries as can be seen in the default config in patch3. The binding should definitly describe what these are. > Required nodes : a sub-node is required for each port the phy provides. > The sub-node name is used to identify dp or usb3 port, > and shall be the following entries: > @@ -50,6 +51,19 @@ Example: > <&cru SRST_P_UPHY0_TCPHY>; > reset-names = "uphy", "uphy-pipe", "uphy-tcphy"; > > + rockchip,phy_config =<0x2a 0x00 > + 0x1f 0x15 > + 0x14 0x22 > + 0x02 0x2b > + 0x21 0x00 > + 0x12 0x15 > + 0x02 0x22 > + 0 0 > + 0x15 0x00 > + 0x00 0x15 > + 0 0 > + 0 0>; I don't think they should be hex-values, as according to the doc above these are values in mV and dB . Heiko