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authorAnson Huang <Anson.Huang@nxp.com>2020-02-17 17:42:55 +0800
committerViresh Kumar <viresh.kumar@linaro.org>2020-02-17 16:15:31 +0530
commita30f8a91f3c25ad7df897bf7877bad410ad19f79 (patch)
tree329849a3b202969cb235981975e964cb50c12473 /drivers/cpufreq
parent0ea4fb29c68950fbeea4e507e3c59ea35bb98ffd (diff)
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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>
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r--drivers/cpufreq/imx-cpufreq-dt.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/cpufreq/imx-cpufreq-dt.c b/drivers/cpufreq/imx-cpufreq-dt.c
index 6cb8193421ea..0e29d88618c9 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;