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cpufreq: imx-cpufreq-dt: Add "cpu-supply" property check 

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@nxp.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Anson Huang 2020-02-17 17:42:55 +08:00 committed by Viresh Kumar
parent 0ea4fb29c6
commit a30f8a91f3
1 changed files with 3 additions and 0 deletions
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3
drivers/cpufreq/imx-cpufreq-dt.c
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@ -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;