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cpufreq: imx6q: Don't disable 792 Mhz OPP unnecessarily
[ Upstream commit2e4e0984c7
] For a 900MHz i.MX6ULL CPU the 792MHz OPP is disabled. There is no convincing reason to disable this OPP. If a CPU can run at 900MHz, it should also be able to cope with 792MHz. Looking at the voltage level of 792MHz in [1] (page 24, table 10. "Operating Ranges") the current defined OPP is above the minimum. So the voltage level shouldn't be a problem. However in [2] (page 24, table 10. "Operating Ranges"), it is not mentioned that 792MHz OPP isn't allowed. Change it to only disable 792MHz OPP for i.MX6ULL types below 792 MHz. [1] https://www.nxp.com/docs/en/data-sheet/IMX6ULLIEC.pdf [2] https://www.nxp.com/docs/en/data-sheet/IMX6ULLCEC.pdf Fixes:0aa9abd4c2
("cpufreq: imx6q: check speed grades for i.MX6ULL") Signed-off-by: Christoph Niedermaier <cniedermaier@dh-electronics.com> Reviewed-by: Marek Vasut <marex@denx.de> Reviewed-by: Fabio Estevam <festevam@denx.de> [ Viresh: Edited subject ] Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -349,7 +349,7 @@ static int imx6ul_opp_check_speed_grading(struct device *dev)
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imx6x_disable_freq_in_opp(dev, 696000000);
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imx6x_disable_freq_in_opp(dev, 696000000);
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if (of_machine_is_compatible("fsl,imx6ull")) {
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if (of_machine_is_compatible("fsl,imx6ull")) {
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if (val != OCOTP_CFG3_6ULL_SPEED_792MHZ)
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if (val < OCOTP_CFG3_6ULL_SPEED_792MHZ)
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imx6x_disable_freq_in_opp(dev, 792000000);
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imx6x_disable_freq_in_opp(dev, 792000000);
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if (val != OCOTP_CFG3_6ULL_SPEED_900MHZ)
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if (val != OCOTP_CFG3_6ULL_SPEED_900MHZ)
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