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    Subject[PATCH AUTOSEL 5.3 037/203] arm64: dts: imx8mq: Correct OPP table according to latest datasheet
    Date
    From: Anson Huang <Anson.Huang@nxp.com>

    [ Upstream commit 9eced3a2f224a62a233761e8af18c907c532e192 ]

    According to latest datasheet (Rev.1, 10/2018) from below links,
    in the consumer datasheet, 1.5GHz is mentioned as highest opp but
    depends on speed grading fuse, and in the industrial datasheet,
    1.3GHz is mentioned as highest opp but depends on speed grading
    fuse. 1.5GHz and 1.3GHz opp use same voltage, so no need for
    consumer part to support 1.3GHz opp, with same voltage, CPU should
    run at highest frequency in order to go into idle as quick as
    possible, this can save power.

    That means for consumer part, 1GHz/1.5GHz are supported, for
    industrial part, 800MHz/1.3GHz are supported, and then check the
    speed grading fuse to limit the highest CPU frequency further.
    Correct the market segment bits in opp table to make them work
    according to datasheets.

    https://www.nxp.com/docs/en/data-sheet/IMX8MDQLQIEC.pdf
    https://www.nxp.com/docs/en/data-sheet/IMX8MDQLQCEC.pdf

    Fixes: 12629c5c3749 ("arm64: dts: imx8mq: Add cpu speed grading and all OPPs")
    Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
    Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com>
    Signed-off-by: Shawn Guo <shawnguo@kernel.org>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    arch/arm64/boot/dts/freescale/imx8mq.dtsi | 5 ++---
    1 file changed, 2 insertions(+), 3 deletions(-)

    diff --git a/arch/arm64/boot/dts/freescale/imx8mq.dtsi b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
    index 52aae341d0da5..d1f4eb197af26 100644
    --- a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
    +++ b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
    @@ -169,15 +169,14 @@
    opp-1300000000 {
    opp-hz = /bits/ 64 <1300000000>;
    opp-microvolt = <1000000>;
    - opp-supported-hw = <0xc>, <0x7>;
    + opp-supported-hw = <0xc>, <0x4>;
    clock-latency-ns = <150000>;
    };

    opp-1500000000 {
    opp-hz = /bits/ 64 <1500000000>;
    opp-microvolt = <1000000>;
    - /* Consumer only but rely on speed grading */
    - opp-supported-hw = <0x8>, <0x7>;
    + opp-supported-hw = <0x8>, <0x3>;
    clock-latency-ns = <150000>;
    };
    };
    --
    2.20.1
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