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

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Date:	Sat, 13 Dec 2014 12:54:14 +0530
From:	Kishon Vijay Abraham I <kishon@...com>
To:	Doug Anderson <dianders@...omium.org>,
	Yunzhi Li <lyz@...k-chips.com>
CC:	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

hi,

On Saturday 13 December 2014 05:49 AM, Doug Anderson wrote:
> 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.
> 
> I'm going to assume you didn't test this version, since it doesn't
> work for me.  At suspend time power is high and my printouts in the
> powerup/powerdown code aren't called...
> 
> 
>> +       for_each_available_child_of_node(dev->of_node, child) {
>> +               rk_phy = devm_kzalloc(dev, sizeof(*rk_phy), GFP_KERNEL);
>> +               if (!rk_phy)
>> +                       return -ENOMEM;
>> +
>> +               if (of_property_read_u32(child, "reg", &reg_offset)) {
>> +                       dev_err(dev, "missing reg property in node %s\n",
>> +                               child->name);
>> +                       return -EINVAL;
>> +               }
>> +
>> +               rk_phy->reg_offset = reg_offset;
>> +               rk_phy->reg_base = grf;
>> +
>> +               rk_phy->clk = of_clk_get_by_name(child, "phyclk");
>> +               if (IS_ERR(rk_phy->clk))
>> +                       rk_phy->clk = NULL;
>> +
>> +               rk_phy->phy = devm_phy_create(dev, child, &ops);
>> +               if (IS_ERR(rk_phy->phy)) {
>> +                       dev_err(dev, "failed to create PHY\n");
>> +                       return PTR_ERR(rk_phy->phy);
>> +               }
>> +               phy_set_drvdata(rk_phy->phy, rk_phy);
>> +       }
>> +
>> +       phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
> 
> I think your bug is here.  I think you now need to register 3 phy
> providers, not just one.

No there should be only one phy provider. It means the bug is elsewhere.

Thanks
Kishon
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