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Date: Mon, 17 Feb 2020 16:16:00 +0530 From: Viresh Kumar <viresh.kumar@...aro.org> To: Anson Huang <Anson.Huang@....com> Cc: rjw@...ysocki.net, shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com, linux-pm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, Linux-imx@....com Subject: Re: [PATCH] cpufreq: imx-cpufreq-dt: Add "cpu-supply" property check On 17-02-20, 17:42, Anson Huang wrote: > The cpufreq-dt driver allows cpufreq driver enabled without valid > regulator assigned, however, all i.MX platforms using cpufreq-dt > driver now require valid regulator, add "cpu-supply" property check > to avoid i.MX platforms' cpufreq enabled without valid regulator > and lead to system unstable. > > Signed-off-by: Anson Huang <Anson.Huang@....com> > --- > drivers/cpufreq/imx-cpufreq-dt.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/cpufreq/imx-cpufreq-dt.c b/drivers/cpufreq/imx-cpufreq-dt.c > index 6cb8193..0e29d88 100644 > --- a/drivers/cpufreq/imx-cpufreq-dt.c > +++ b/drivers/cpufreq/imx-cpufreq-dt.c > @@ -31,6 +31,9 @@ static int imx_cpufreq_dt_probe(struct platform_device *pdev) > int speed_grade, mkt_segment; > int ret; > > + if (!of_find_property(cpu_dev->of_node, "cpu-supply", NULL)) > + return -ENODEV; > + > ret = nvmem_cell_read_u32(cpu_dev, "speed_grade", &cell_value); > if (ret) > return ret; Applied. Thanks. -- viresh
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