Suggestions needed for resolving DT issues between kernel 3.10 and 4.4
Hi, I am facing some issues with device-trees (I am fairly new to them) and need some pointers about how to approach below problem: I got some I.MX6Q based hardware (some custom made whose hardware details are unknown to me). Hardware shipped with 3.10.53 kernel with full sources and everything is working on it Trying to get one of the recent kernel working on it (linux-4.4, from linux-linaro-stable with rt patches). I can compile the kernel and boot into it using 3.10.xx kernel compiled DTB but getting Warning at boot-time "Outdated DT detected, suspend/resume will NOT work" and few main hardware components not working (mainly ethernet(s) - 1 out of 4 ports working though, MTD/NAND (for u-boot environment)) So I looked into compiling the DTS (from 3.10 kernel) for 4.4 and managed to get it compiled. Now no warning of outdated DT _but_ still hardware components not working. I was assuming that as hardware is still same for both kernel 3.10 and 4.4, so it should work, but seems like something in DT is off for 4.4 kernel. Any help and suggestions will be good enough for me to look into above issue. Thanks and regards, -- Fawad Lateef
Hi, One more thing I realised that eth0 which is working is directly out of SOM/SOC but other 3 eth ports are connected to a internal USB switch (so Linux should see only eth1 besides eth0). So seems like flash/nand chip (m25p80) and spi_ks8995 (Micrel KS8995 Ethernet switch SPI) mainly not working. Thanks -- Fawad Lateef On 3 April 2017 at 10:38, Fawad Lateef <fawadlateef@gmail.com> wrote:
Hi,
I am facing some issues with device-trees (I am fairly new to them) and need some pointers about how to approach below problem:
I got some I.MX6Q based hardware (some custom made whose hardware details are unknown to me). Hardware shipped with 3.10.53 kernel with full sources and everything is working on it
Trying to get one of the recent kernel working on it (linux-4.4, from linux-linaro-stable with rt patches). I can compile the kernel and boot into it using 3.10.xx kernel compiled DTB but getting Warning at boot-time "Outdated DT detected, suspend/resume will NOT work" and few main hardware components not working (mainly ethernet(s) - 1 out of 4 ports working though, MTD/NAND (for u-boot environment))
So I looked into compiling the DTS (from 3.10 kernel) for 4.4 and managed to get it compiled. Now no warning of outdated DT _but_ still hardware components not working.
I was assuming that as hardware is still same for both kernel 3.10 and 4.4, so it should work, but seems like something in DT is off for 4.4 kernel.
Any help and suggestions will be good enough for me to look into above issue.
Thanks and regards,
-- Fawad Lateef
Hi, Just as an update (and for future reference for anyone having similar issue): I got this all this sorted-out. Had to change some dt-binding for device and it was mostly drivers related changes for hardware components. Mostly nothing to do with DT. Thanks Fawad Lateef -- Fawad Lateef On 3 April 2017 at 10:54, Fawad Lateef <fawadlateef@gmail.com> wrote:
Hi,
One more thing I realised that eth0 which is working is directly out of SOM/SOC but other 3 eth ports are connected to a internal USB switch (so Linux should see only eth1 besides eth0).
So seems like flash/nand chip (m25p80) and spi_ks8995 (Micrel KS8995 Ethernet switch SPI) mainly not working.
Thanks
-- Fawad Lateef
On 3 April 2017 at 10:38, Fawad Lateef <fawadlateef@gmail.com> wrote:
Hi,
I am facing some issues with device-trees (I am fairly new to them) and need some pointers about how to approach below problem:
I got some I.MX6Q based hardware (some custom made whose hardware details are unknown to me). Hardware shipped with 3.10.53 kernel with full sources and everything is working on it
Trying to get one of the recent kernel working on it (linux-4.4, from linux-linaro-stable with rt patches). I can compile the kernel and boot into it using 3.10.xx kernel compiled DTB but getting Warning at boot-time "Outdated DT detected, suspend/resume will NOT work" and few main hardware components not working (mainly ethernet(s) - 1 out of 4 ports working though, MTD/NAND (for u-boot environment))
So I looked into compiling the DTS (from 3.10 kernel) for 4.4 and managed to get it compiled. Now no warning of outdated DT _but_ still hardware components not working.
I was assuming that as hardware is still same for both kernel 3.10 and 4.4, so it should work, but seems like something in DT is off for 4.4 kernel.
Any help and suggestions will be good enough for me to look into above issue.
Thanks and regards,
-- Fawad Lateef
On Tue, Apr 4, 2017 at 6:11 PM, Fawad Lateef <fawadlateef@gmail.com> wrote:
Hi,
Just as an update (and for future reference for anyone having similar issue):
I got this all this sorted-out. Had to change some dt-binding for device and it was mostly drivers related changes for hardware components. Mostly nothing to do with DT.
Thanks
Fawad Lateef
-- Fawad Lateef
On 3 April 2017 at 10:54, Fawad Lateef <fawadlateef@gmail.com> wrote:
Hi,
One more thing I realised that eth0 which is working is directly out of SOM/SOC but other 3 eth ports are connected to a internal USB switch (so Linux should see only eth1 besides eth0).
So seems like flash/nand chip (m25p80) and spi_ks8995 (Micrel KS8995 Ethernet switch SPI) mainly not working.
Thanks
-- Fawad Lateef
On 3 April 2017 at 10:38, Fawad Lateef <fawadlateef@gmail.com> wrote:
Hi,
I am facing some issues with device-trees (I am fairly new to them) and need some pointers about how to approach below problem:
I got some I.MX6Q based hardware (some custom made whose hardware details are unknown to me). Hardware shipped with 3.10.53 kernel with full sources and everything is working on it
Trying to get one of the recent kernel working on it (linux-4.4, from linux-linaro-stable with rt patches). I can compile the kernel and boot into it using 3.10.xx kernel compiled DTB but getting Warning at boot-time "Outdated DT detected, suspend/resume will NOT work" and few main hardware components not working (mainly ethernet(s) - 1 out of 4 ports working though, MTD/NAND (for u-boot environment))
So I looked into compiling the DTS (from 3.10 kernel) for 4.4 and managed to get it compiled. Now no warning of outdated DT _but_ still hardware components not working.
I was assuming that as hardware is still same for both kernel 3.10 and 4.4, so it should work, but seems like something in DT is off for 4.4 kernel.
Any help and suggestions will be good enough for me to look into above issue.
Thanks and regards,
-- Fawad Lateef
Great share of issue plus the solution, Fawaad 😎 regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com
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Fawad Lateef -
Mulyadi Santosa