Commit Graph

7 Commits

Author SHA1 Message Date
Anson Huang 83fe39ad0a cpufreq: imx-cpufreq-dt: Add i.MX8MP support
Add i.MX8MP cpufreq DT support for speed grading and market
segment check.

Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
[ Viresh: Minor formatting fixes ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2020-01-07 13:29:58 +05:30
Anson Huang af44d180e3 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: 5b8010ba70 ("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>
2019-10-22 14:08:50 +05:30
Anson Huang 75c000c4bc cpufreq: imx-cpufreq-dt: Add i.MX8MN support
i.MX8MN has different speed grading definition as below, it has 4 bits
to define speed grading, add support for it.

 SPEED_GRADE[3:0]    MHz
    0000            2300
    0001            2200
    0010            2100
    0011            2000
    0100            1900
    0101            1800
    0110            1700
    0111            1600
    1000            1500
    1001            1400
    1010            1300
    1011            1200
    1100            1100
    1101            1000
    1110             900
    1111             800

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2019-08-22 11:31:04 +05:30
Anson Huang 5b8010ba70 cpufreq: imx-cpufreq-dt: Add i.MX8MN support
i.MX8MN is a new SoC of i.MX8M series, it also uses speed
grading and market segment fuses for OPP definitions, add
support for this SoC.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2019-07-08 23:58:01 +02:00
Leonard Crestez 7d5f589a52 cpufreq: imx-cpufreq-dt: Remove global platform match list
This is not currently needed, instead a platform device is always created
from SOC-specific code.

We can use of_machine_is_compatible for per-SOC behavior instead.

Suggested-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2019-06-06 08:37:23 +05:30
Leonard Crestez c2147585cc cpufreq: imx-cpufreq-dt: Fix no OPPs available on unfused parts
Early samples without fuses written report "0 0" which means consumer
segment and minimum speed grading. According to datasheet the minimum speed
grade is not supported for consumer parts so all OPPs are disabled
which results in stack dumps later on.

Fix by clamping minimum consumer speed grade to 1 on imx8mm and imx8mq.

Fixes: 4d28ba1d62 ("cpufreq: Add imx-cpufreq-dt driver")

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
[ Viresh: s/minumum/minimum/ in patch and log ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2019-06-03 11:04:13 +05:30
Leonard Crestez 4d28ba1d62 cpufreq: Add imx-cpufreq-dt driver
Right now in upstream imx8m cpufreq support just lists a common subset
of OPPs because the higher ones should only be attempted after checking
speed grading in fuses.

Add a small driver which checks speed grading from nvmem cells before
registering cpufreq-dt.

This driver allows unlocking all frequencies for imx8mm and imx8mq and
could be applied to other chips like imx7d

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2019-05-20 12:47:48 +05:30