From a30f8a91f3c25ad7df897bf7877bad410ad19f79 Mon Sep 17 00:00:00 2001 From: Anson Huang Date: Mon, 17 Feb 2020 17:42:55 +0800 Subject: 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 Signed-off-by: Viresh Kumar --- drivers/cpufreq/imx-cpufreq-dt.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/cpufreq/imx-cpufreq-dt.c') 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; -- cgit