linux-kernel - Re: [PATCH v5 29/44] ARM: da8xx: add new USB PHY clock init using common clock framework

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Message-ID: <e549631a-b969-a1d3-ff7e-91ef65c5621a@ti.com>
Date:   Fri, 19 Jan 2018 10:38:08 +0530
From:   Sekhar Nori <nsekhar@...com>
To:     David Lechner <david@...hnology.com>, <linux-clk@...r.kernel.org>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
CC:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Kevin Hilman <khilman@...nel.org>,
        Adam Ford <aford173@...il.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 29/44] ARM: da8xx: add new USB PHY clock init using
 common clock framework

On Friday 19 January 2018 12:13 AM, David Lechner wrote:
> On 01/18/2018 09:14 AM, Sekhar Nori wrote:
>> On Monday 08 January 2018 07:47 AM, David Lechner wrote:
>>> +int __init da8xx_register_usb20_phy_clk(bool use_usb_refclkin)
>>> +{
>>> +    struct regmap *cfgchip;
>>> +    struct clk *usb0_psc_clk, *clk;
>>> +    struct clk_hw *parent;
>>> +
>>> +    cfgchip = syscon_regmap_lookup_by_compatible("ti,da830-cfgchip");
>>
>> Am I right in understanding that this API is only called for non-DT
>> boot? If yes, do we really need the lookup by compatible?
> 
> This code is used in DT boot until [PATCH v5 43/44] "ARM: da8xx-dt:
> switch to device tree clocks". So, yes it is needed temporarily to
> prevent breaking USB.

Alright, so this line should probably be dropped either as part of 43/44
or later.

Thanks,
Sekhar