linux-kernel - Re: [PATCH v7 2/5] phy: add a driver for the Rockchip SoC internal USB2.0 PHY

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Message-ID: <CAD=FV=WvEcZAf-4yDBFVb3Bq8XLv=vWB5cM7GT9spOuYDLk96A@mail.gmail.com>
Date:	Mon, 15 Dec 2014 10:12:20 -0800
From:	Doug Anderson <dianders@...omium.org>
To:	Yunzhi Li <lyz@...k-chips.com>
Cc:	Kishon Vijay Abraham I <kishon@...com>,
	Heiko Stübner <heiko@...ech.de>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	jwerner@...omium.org, Olof Johansson <olof@...om.net>,
	Tao Huang <huangtao@...k-chips.com>,
	Chris <zyw@...k-chips.com>, Eddie Cai <cf@...k-chips.com>
Subject: Re: [PATCH v7 2/5] phy: add a driver for the Rockchip SoC internal
 USB2.0 PHY

Yunzhi,

On Fri, Dec 12, 2014 at 7:07 AM, Yunzhi Li <lyz@...k-chips.com> wrote:
> This patch to add a generic PHY driver for ROCKCHIP usb PHYs,
> currently this driver can support RK3288. The RK3288 SoC have
> three independent USB PHY IPs which are all configured through a
> set of registers located in the GRF (general register files)
> module.
>
> Signed-off-by: Yunzhi Li <lyz@...k-chips.com>
>
> ---
>
> Changes in v7:
> - Accept Kishon's comments to use phandle args to find a phy
>   struct directly and get rid of using a custom of_xlate
>   function.
>
> Changes in v6:
> - Rename SIDDQ_MSK to SIDDQ_WRITE_ENA.
>
> Changes in v5: None
> Changes in v4:
> - Get number of PHYs from device tree.
> - Model each PHY as subnode of the phy provider node.
>
> Changes in v3:
> - Use BIT macro instead of bit shift ops.
> - Rename the config entry to PHY_ROCKCHIP_USB.
>
>  drivers/phy/Kconfig            |   7 ++
>  drivers/phy/Makefile           |   1 +
>  drivers/phy/phy-rockchip-usb.c | 158 +++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 166 insertions(+)
>  create mode 100644 drivers/phy/phy-rockchip-usb.c

On rk3288-pinky (on a 3.14 tree with backports), I can confirm that
this properly gets us into low power at suspend time.

Tested-by: Doug Anderson <dianders@...omium.org>
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