Patch "cpufreq: imx6q: Don't disable 792 Mhz OPP unnecessarily" has been added to the 5.15-stable tree

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



This is a note to let you know that I've just added the patch titled

    cpufreq: imx6q: Don't disable 792 Mhz OPP unnecessarily

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     cpufreq-imx6q-don-t-disable-792-mhz-opp-unnecessaril.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit ebaafcfd9bf51b7b96e448495d0112f320cc2c90
Author: Christoph Niedermaier <cniedermaier@xxxxxxxxxxxxxxxxxx>
Date:   Wed Nov 22 14:41:13 2023 +0100

    cpufreq: imx6q: Don't disable 792 Mhz OPP unnecessarily
    
    [ Upstream commit 2e4e0984c7d696cc74cf2fd7e7f62997f0e9ebe6 ]
    
    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: 0aa9abd4c212 ("cpufreq: imx6q: check speed grades for i.MX6ULL")
    Signed-off-by: Christoph Niedermaier <cniedermaier@xxxxxxxxxxxxxxxxxx>
    Reviewed-by: Marek Vasut <marex@xxxxxxx>
    Reviewed-by: Fabio Estevam <festevam@xxxxxxx>
    [ Viresh: Edited subject ]
    Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/cpufreq/imx6q-cpufreq.c b/drivers/cpufreq/imx6q-cpufreq.c
index 37d30fa2df5fa..67f98a083d223 100644
--- a/drivers/cpufreq/imx6q-cpufreq.c
+++ b/drivers/cpufreq/imx6q-cpufreq.c
@@ -327,7 +327,7 @@ static int imx6ul_opp_check_speed_grading(struct device *dev)
 			imx6x_disable_freq_in_opp(dev, 696000000);
 
 	if (of_machine_is_compatible("fsl,imx6ull")) {
-		if (val != OCOTP_CFG3_6ULL_SPEED_792MHZ)
+		if (val < OCOTP_CFG3_6ULL_SPEED_792MHZ)
 			imx6x_disable_freq_in_opp(dev, 792000000);
 
 		if (val != OCOTP_CFG3_6ULL_SPEED_900MHZ)



[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux