From: Christoph Niedermaier Date: Tue, 11 Feb 2020 11:58:07 +0000 (+0100) Subject: cpufreq: imx6q: Fixes unwanted cpu overclocking on i.MX6ULL X-Git-Tag: v5.7-rc1~70^2^3~3^2~8 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=36eb7dc1bd42fe5f850329c893768ff89b696fba;p=tomoyo%2Ftomoyo-test1.git cpufreq: imx6q: Fixes unwanted cpu overclocking on i.MX6ULL imx6ul_opp_check_speed_grading is called for both i.MX6UL and i.MX6ULL. Since the i.MX6ULL was introduced to a separate ocotp compatible node later, it is possible that the i.MX6ULL has also dtbs with "fsl,imx6ull-ocotp". On a system without nvmem-cell speed grade a missing check on this node causes a driver fail without considering the cpu speed grade. This patch prevents unwanted cpu overclocking on i.MX6ULL with compatible node "fsl,imx6ull-ocotp" in old dtbs without nvmem-cell speed grade. Fixes: 2733fb0d0699 ("cpufreq: imx6q: read OCOTP through nvmem for imx6ul/imx6ull") Signed-off-by: Christoph Niedermaier Signed-off-by: Viresh Kumar --- diff --git a/drivers/cpufreq/imx6q-cpufreq.c b/drivers/cpufreq/imx6q-cpufreq.c index 648a09a1778a..1fcbbd53a48a 100644 --- a/drivers/cpufreq/imx6q-cpufreq.c +++ b/drivers/cpufreq/imx6q-cpufreq.c @@ -281,6 +281,9 @@ static int imx6ul_opp_check_speed_grading(struct device *dev) np = of_find_compatible_node(NULL, NULL, "fsl,imx6ul-ocotp"); if (!np) + np = of_find_compatible_node(NULL, NULL, + "fsl,imx6ull-ocotp"); + if (!np) return -ENOENT; base = of_iomap(np, 0);