On 02/14/2019 06:54 PM, Christophe Leroy wrote: > > > Le 13/02/2019 à 16:27, Christophe Leroy a écrit : >> >> >> Le 13/02/2019 à 13:53, sgosavi1 a écrit : >>>> Why using 4.15.13 which is obsolete instead of using one of the Long >>>> Term Support versions which are still maintained, like 4.14 or 4.19 ? >>>> (see the complete list at https://www.kernel.org/category/releases.html) >>> >>> Well, when I started this task 4.15.13 was probably the latest stable >>> release and hence we decided to port this version. In the older kernel, we >>> have the m8260_setup.c source file for our board where the function >>> "io_block_mapping" was used to configure the non-standard IO port address >>> starting at 0xe0000000 location. This address was passed as the base address >>> followed by control address and IRQ number to the ide-core.ko module. In the >>> new kernel we do not have an option to send these addresses and IRQ numbers >>> as arguments to the driver. Instead the ide-generic.c source file in the new >>> kernel uses the standard IO port values and IRQ values. I modified the code >>> in the above file to used the addresses and IRQ number we used in the past. >>> Also, added code in the "MMU_init" function call available under >>> arch/PowerPC/init_32.c to setup the IO port address range by adding the >>> "io_block_mapping" call and the required IO port address range. >>> >>> Is there anything else that needs to be added or how can we configure the >>> desired IO address range in the new kernel? >>> >> >> Maybe look around https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=9a0e77f28b50128df0c9e26ae489e44e29a7270a >> >> Also look at ide_platform.c. I imagine there must be some way to set it up in your device tree. Please don't add new users to subsystem deprecated almost 10 years ago.. >> Maybe Bartlomiej Zolnierkiewicz can help ? >> >> Christophe > > Le 14/02/2019 à 09:17, sgosavi1 a écrit :>> Maybe look around >> >> I have gone through this before and also tried the pata_platform driver but >> no success yet. I haven't found any example that passes the IO ports and IRQ >> information through the device tree to the driver code. Please look at pata_of_platform.c driver from libata subsystem, it should have all required functionality. >> Thanks, >> Sachin. > > > Maybe someone from the IDE SUBSYSTEM would be able to help better ? > > Entire thread at http://linuxppc.10917.n7.nabble.com/Kernel-panic-when-loading-the-IDE-controller-driver-td150020.html#none > > Christophe Best regards, -- Bartlomiej Zolnierkiewicz Samsung R&D Institute Poland Samsung Electronics
