cpufreq: imx-cpufreq-dt: Correct i.MX8MN's default speed grade value

i.MX8MN has different speed grade definition compared to
i.MX8MQ/i.MX8MM, when fuses are NOT written, the default
speed_grade should be set to minimum available OPP defined
in DT which is 1.2GHz, the corresponding speed_grade value
should be 0xb.

Fixes: 5b8010ba70d5 ("cpufreq: imx-cpufreq-dt: Add i.MX8MN support")
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

diff --git a/drivers/cpufreq/imx-cpufreq-dt.c b/drivers/cpufreq/imx-cpufreq-dt.c
index 35db14cf31026a73728ad54ba11cdf007f6b3645..85a6efd6b68f9a5ab02a11cae4ba0f7c374c44d9 100644 (file)
--- a/drivers/cpufreq/imx-cpufreq-dt.c
+++ b/drivers/cpufreq/imx-cpufreq-dt.c
@@ -44,19 +44,19 @@ static int imx_cpufreq_dt_probe(struct platform_device *pdev)
        mkt_segment = (cell_value & OCOTP_CFG3_MKT_SEGMENT_MASK) >> OCOTP_CFG3_MKT_SEGMENT_SHIFT;
 
        /*
-        * Early samples without fuses written report "0 0" which means
-        * consumer segment and minimum speed grading.
-        *
-        * According to datasheet minimum speed grading is not supported for
-        * consumer parts so clamp to 1 to avoid warning for "no OPPs"
+        * Early samples without fuses written report "0 0" which may NOT
+        * match any OPP defined in DT. So clamp to minimum OPP defined in
+        * DT to avoid warning for "no OPPs".
         *
         * Applies to i.MX8M series SoCs.
         */
-       if (mkt_segment == 0 && speed_grade == 0 && (
-                       of_machine_is_compatible("fsl,imx8mm") ||
-                       of_machine_is_compatible("fsl,imx8mn") ||
-                       of_machine_is_compatible("fsl,imx8mq")))
-               speed_grade = 1;
+       if (mkt_segment == 0 && speed_grade == 0) {
+               if (of_machine_is_compatible("fsl,imx8mm") ||
+                   of_machine_is_compatible("fsl,imx8mq"))
+                       speed_grade = 1;
+               if (of_machine_is_compatible("fsl,imx8mn"))
+                       speed_grade = 0xb;
+       }
 
        supported_hw[0] = BIT(speed_grade);
        supported_hw[1] = BIT(mkt_segment);