[U-Boot] [PATCH v3] drivers: spi: migrate cf_spi to DM

[Angelo Dureghello <angelo@sysam.it>]

Hi Jagan,

On Tue, Aug 07, 2018 at 10:53:28AM +0530, Jagan Teki wrote:
> On Fri, Jun 29, 2018 at 1:18 AM, Angelo Dureghello <angelo@sysam.it> wrote:
> > Hi Jagan,
> >
> > On Wed, Jun 27, 2018 at 02:54:42PM +0530, Jagan Teki wrote:
> >> On Wed, Jun 27, 2018 at 2:27 PM, Angelo Dureghello <angelo@sysam.it> wrote:
> >> > Hi Jagan,
> >> >
> >> > On Wed, Jun 27, 2018 at 12:08:26PM +0530, Jagan Teki wrote:
> >> >> On Tue, Jun 26, 2018 at 10:28 PM, Angelo Dureghello <angelo@sysam.it> wrote:
> >> >> > This patch adds DM support to cf_spi.c.
> >> >> >
> >> >> > How to use/test it:
> >> >> >
> >> >> > 1) enable the following options,
> >> >> >
> >> >> > CONFIG_DM_SPI
> >> >> > CONFIG_DM_SPI_FLASH
> >> >> >
> >> >> > 2) add similar code into your board.c file
> >> >> >
> >> >> > U_BOOT_DEVICE(coldfire_spi) = {
> >> >> >         .name = "spi_coldfire",
> >> >> >         .platdata = &mcf_spi_plat,
> >> >> > };
> >> >> >
> >> >> > ---
> >> >> > Changes from v1:
> >> >> > - split into 2 patches
> >> >> >
> >> >> > Changes from v2:
> >> >> > - back in a single patch, no need to add fdt support or special
> >> >> >   config options
> >> >> > - doc/driver-model/spi-howto.txt has been re-checked and followed,
> >> >> >   the driver now builds as is.
> >> >>
> >> >> Nice, How about full dm conversion. I have seen few boards using this
> >> >> driver and its quite manageble for full switching. what do you think?
> >> >
> >> > Sorry, what do you mean exactly for full switching ?
> >> > My understanding is, to remove the non-dm part of the driver and add to
> >> > each board proper device struct and config options, correct ?
> >>
> >> yes.
> >>
> >> > In this case, i can only test it on my stmark2 board, but i think could
> >> > be enough.
> >>
> >> yes, for untested ones will ask other board maintainers.
> >
> > I verified right now, for a full switch i should enable CONFIG_DM for
> > the architecture, and then select CONFIG_DM_SPI, moving as his child
> > the CONFIG_CF_SPI.
> >
> > To enable CONFIG_DM for m68k means to add device tree, or there are
> > of_xxx functions unresolved externals errors then.
> 
> Can you list me these funcs.
> 
Sure, i enabled CONFIG_DM in my stmark2_defconfig, getting

drivers/spi/built-in.o: In function `dev_read_u32_default':
/home/angelo/sysam/u-boot-coldfire/include/dm/read.h:467: undefined reference to `ofnode_read_u32_default'
/home/angelo/sysam/u-boot-coldfire/include/dm/read.h:467: undefined reference to `ofnode_read_u32_default'
/home/angelo/sysam/u-boot-coldfire/include/dm/read.h:467: undefined reference to `ofnode_read_u32_default'
drivers/spi/built-in.o: In function `dev_read_bool':
/home/angelo/sysam/u-boot-coldfire/include/dm/read.h:478: undefined reference to `ofnode_read_bool'
/home/angelo/sysam/u-boot-coldfire/include/dm/read.h:478: undefined reference to `ofnode_read_bool'
/home/angelo/sysam/u-boot-coldfire/include/dm/read.h:478: undefined reference to `ofnode_read_bool'
/home/angelo/sysam/u-boot-coldfire/include/dm/read.h:478: undefined reference to `ofnode_read_bool'
/home/angelo/sysam/u-boot-coldfire/include/dm/read.h:478: undefined reference to `ofnode_read_bool'
drivers/spi/built-in.o: In function `dev_read_u32_default':
/home/angelo/sysam/u-boot-coldfire/include/dm/read.h:467: undefined reference to `ofnode_read_u32_default'
/home/angelo/sysam/u-boot-coldfire/include/dm/read.h:467: undefined reference to `ofnode_read_u32_default'
drivers/spi/built-in.o:(.u_boot_list_2_uclass_2_spi+0x8): undefined reference to `dm_scan_fdt_dev'
make: *** [Makefile:1350: u-boot] Error 1

> >
> > For this small architecture, i am not that happy to add the devicetree
> > support. I should add a fixed 30 KB of binary size and several diffent
> > families/dtsi, with the benefit to configure mainly uart and spi.
> 
> I think we may rely some kind of platdata stuff for DT functions here,
> if size is really matter with DT.
> 
> btw, you're patch seems checkpatch errors, check it the same?
>
Sorry, not sure why, i generally alays check by checkpatch.pl.
Can fix them all in a v3 if you don't have other points.

Waiting for your feedbacks.
 
> total: 43 errors, 0 warnings, 0 checks, 607 lines checked

Regards,
Angelo Dureghello