linux-kernel - Re: [PATCH] ARM: OMAP2+: Fix warnings with broken omap2_set_init

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Date:   Fri, 6 Dec 2019 10:20:40 -0800
From:   Tony Lindgren <tony@...mide.com>
To:     "H. Nikolaus Schaller" <hns@...delico.com>
Cc:     Nishanth Menon <nm@...com>, Tero Kristo <t-kristo@...com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        André Roth <neolynx@...il.com>,
        Linux-OMAP <linux-omap@...r.kernel.org>,
        Adam Ford <aford173@...il.com>,
        arm-soc <linux-arm-kernel@...ts.infradead.org>,
        Discussions about the Letux Kernel 
        <letux-kernel@...nphoenux.org>
Subject: Re: [PATCH] ARM: OMAP2+: Fix warnings with broken
 omap2_set_init_voltage()

* H. Nikolaus Schaller <hns@...delico.com> [191203 16:55]:
> > What we could do is augment the printk (or dev_err) to tell
> > in these warnings what it is looking for...
> > 
> > 	opp = dev_pm_opp_find_freq_ceil(dev, &freq);
> > 	if (IS_ERR(opp)) {
> > 		pr_err("%s: unable to find boot up OPP for vdd_%s freq %ulHz\n",
> > 		__func__, vdd_name, freq);
> > 		goto exit;
> > 	}
> 
> Easier and always prints info:
> 
> 	freq = clk_get_rate(clk);
> 	clk_put(clk);
> 
> 	pr_info("%s: vdd=%s clk=%s %luHz oh=%s\n", __func__, vdd_name, clk_name, freq, oh_name);
> 
> 	opp = dev_pm_opp_find_freq_ceil(dev, &freq);
> 
> I get this:
> 
> [    2.908142] omap2_set_init_voltage: vdd=mpu_iva clk=dpll1_ck 1000000000Hz oh=mpu
> [    2.930816] omap2_set_init_voltage: vdd=core clk=l3_ick 200000000Hz oh=l3_main
> [    2.946228] omap2_set_init_voltage: unable to find boot up OPP for vdd_core
> [    2.953460] omap2_set_init_voltage: unable to set vdd_core

OK yeah that's more descriptive.

> Which means that cpufreq already has increased dpll1_ck to 1 GHz
> (I have removed the turbo-mode tags so that it already boots at
> full speed) and l3_ick runs at initial 200 MHz.

OK. I wonder where this initial code should live though..

Regards,

Tony