Hi, > Am 24.03.2019 um 19:59 schrieb Aaro Koskinen <[email protected]>: > > Hi, > > On Sun, Mar 24, 2019 at 05:48:22PM +0100, Janusz Krzysztofik wrote: >> Hi Aaro, >> >> Thanks for your review. >> >> On Wednesday, March 20, 2019 2:16:30 AM CET Aaro Koskinen wrote: >>> On Tue, Mar 19, 2019 at 11:37:18PM +0100, Janusz Krzysztofik wrote: >>>> After recent modifications, only a hardcoded partition info makes >>>> the driver device specific. Other than that, the driver uses GPIO >>>> exclusively and can be used on any hardware. >>>> >>>> Drop the partition info and use MTD partition parser with default >>>> list of partition types instead. >>>> >>>> Amstrad Delta users should append the followig partition info to their >>> ^^^^^^^^ >>> Should be "following". >>> >>>> kernel command line, possibly by embedding it in CONFIG_CMDLINE: >>>> mtdparts=ams-delta-nand:3584k(Kernel),256k(u-boot),256k(u-boot_params),\ >>>> 256k(Amstrad_LDR),27m(File_system),768k(PBL_reserved). For their >>>> convenience, select CONFIG_MTD_CMDLINE_PARTS symbol from that board >>>> Kconfig automatically if this NAND driver is also selected. >>>> >>>> Signed-off-by: Janusz Krzysztofik <[email protected]> >>>> Cc: Tony Lindgren <[email protected]> >>> >>> Could we move the fixed partition setup to the board file >>> instead? Otherwise this kind of change is not really nice for the users, >>> as it will likely break existing setups. The default partition layout >>> should remain the same. >> >> I'm wondering if it would be acceptable to pass partition info from a .dts >> file. I think that would be a better, more modern approach than adding a >> new >> header under include/linux/platform_data. > > Hmm, I thought there was some generic way to define partitions without > adding any new headers. But if that is not possible, then I guess your > CMDLINE proposal is the preferred one..
I am not sure what you exactly need, but partitions can be defined in the DTS as children of some NAND drivers. Example: arch/arm/boot/dts/omap3-beagle.dts So this design pattern could be copied instead of using CMDLINE.
