Messages in this thread | | | Subject | Re: [PATCH] cpufreq: imx6q-cpufreq: Fix speed grading check for imx6qp | From | Lucas Stach <> | Date | Tue, 19 Dec 2017 18:02:20 +0100 |
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Am Dienstag, den 19.12.2017, 16:56 +0100 schrieb Stefan Riedmueller: > Add compatibility for the i.MX 6QuadPlus to make it behave like the > i.MX 6Quad, as both SOCs use the same operating points. Otherwise the > i.MX 6QuadPlus tries to run with 1.2 GHz even though it only > supports 1 GHz.
There is already an applied patch to fix this issue:
https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git/commit/?h=bleeding-edge&id=ccc153a6de1f7741b5ef7c996f9be133772b2092
Regards, Lucas > Signed-off-by: Stefan Riedmueller <s.riedmueller@phytec.de> > --- > drivers/cpufreq/imx6q-cpufreq.c | 8 +++++--- > 1 file changed, 5 insertions(+), 3 deletions(-) > > diff --git a/drivers/cpufreq/imx6q-cpufreq.c b/drivers/cpufreq/imx6q-cpufreq.c > index 628fe89..5ca1988 100644 > --- a/drivers/cpufreq/imx6q-cpufreq.c > +++ b/drivers/cpufreq/imx6q-cpufreq.c > @@ -218,7 +218,7 @@ static void imx6q_opp_check_speed_grading(struct device *dev) > > * SPEED_GRADING[1:0] defines the max speed of ARM: > > * 2b'11: 1200000000Hz; > > * 2b'10: 996000000Hz; > > - * 2b'01: 852000000Hz; -- i.MX6Q Only, exclusive with 996MHz. > > + * 2b'01: 852000000Hz; -- i.MX6Q/QP Only, exclusive with 996MHz. > > * 2b'00: 792000000Hz; > > * We need to set the max speed of ARM according to fuse map. > > */ > @@ -227,13 +227,15 @@ static void imx6q_opp_check_speed_grading(struct device *dev) > > val &= 0x3; > > > if ((val != OCOTP_CFG3_SPEED_1P2GHZ) && > > - of_machine_is_compatible("fsl,imx6q")) > > + (of_machine_is_compatible("fsl,imx6q") || > > + of_machine_is_compatible("fsl,imx6qp"))) > > if (dev_pm_opp_disable(dev, 1200000000)) > > dev_warn(dev, "failed to disable 1.2GHz OPP\n"); > > if (val < OCOTP_CFG3_SPEED_996MHZ) > > if (dev_pm_opp_disable(dev, 996000000)) > > dev_warn(dev, "failed to disable 996MHz OPP\n"); > > - if (of_machine_is_compatible("fsl,imx6q")) { > > + if (of_machine_is_compatible("fsl,imx6q") || > > + of_machine_is_compatible("fsl,imx6qp")) { > > if (val != OCOTP_CFG3_SPEED_852MHZ) > > if (dev_pm_opp_disable(dev, 852000000)) > > dev_warn(dev, "failed to disable 852MHz OPP\n");
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