linux-kernel - Re: [PATCH 0/7] clk: at91: sckc: improve error path

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Date:   Fri, 21 Jun 2019 11:33:02 +0200
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Claudiu.Beznea@...rochip.com
Cc:     mturquette@...libre.com, sboyd@...nel.org,
        Nicolas.Ferre@...rochip.com, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        claudiu.beznea@...il.com
Subject: Re: [PATCH 0/7] clk: at91: sckc: improve error path

On 20/06/2019 10:30:42+0000, Claudiu.Beznea@...rochip.com wrote:
> Hi,
> 
> On 18.06.2019 12:55, Alexandre Belloni wrote:
> > On 13/06/2019 15:37:06+0000, Claudiu.Beznea@...rochip.com wrote:
> >> From: Claudiu Beznea <claudiu.beznea@...rochip.com>
> >>
> >> Hi,
> >>
> >> This series tries to improve error path for slow clock registrations
> >> by adding functions to free resources and using them on failures.
> >>
> > 
> > Does the platform even boot when the slow clock is not available? 
> > 
> > The TCB clocksource would fail at:
> > 
> >         tc.slow_clk = of_clk_get_by_name(node->parent, "slow_clk");
> >         if (IS_ERR(tc.slow_clk))
> >                 return PTR_ERR(tc.slow_clk);
> > 
> 
> In case of using TC as clocksource, yes, the platform wouldn't boot if slow
> clock is not available, because, anyway the TC needs it. PIT may work
> without it (if slow clock is not used to drive the PIT).
> 
> For sure there are other IPs (which may be or are driven by slow clock)
> which may not work if slow clock is driven them.
> 
> Anyway, please let me know if you feel this series has no meaning.
> 

Well, I'm not sure it is worth it but at the same time, it is not adding
many lines and you already developed it...


-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com