[U-Boot] [PATCH 1/3] i.MX6: mx6qsabrelite: add CONFIG_REVISION_TAG

Marek Vasut
2012-03-04T20:59:07Z

> On 03/02/2012 03:59 PM, Marek Vasut wrote:
> >> Freescale 2.6.38 (Non-DT) kernels require the revision atag to
> >> enable the VPU.
> >>
> >> Signed-off-by: Eric Nelson<eric.nelson@boundarydevices.com>
> >> ---
> >>
> >> board/freescale/mx6qsabrelite/mx6qsabrelite.c | 7 +++++++
> >> include/configs/mx6qsabrelite.h | 1 +
> >> 2 files changed, 8 insertions(+), 0 deletions(-)
> >>
> >> diff --git a/board/freescale/mx6qsabrelite/mx6qsabrelite.c
> >> b/board/freescale/mx6qsabrelite/mx6qsabrelite.c index db1bea9..590030b
> >> 100644
> >> --- a/board/freescale/mx6qsabrelite/mx6qsabrelite.c
> >> +++ b/board/freescale/mx6qsabrelite/mx6qsabrelite.c
> >> @@ -215,6 +215,13 @@ int board_mmc_init(bd_t *bis)
> >>
> >> }
> >> #endif
> >>
> >> +#ifdef CONFIG_REVISION_TAG
> >> +u32 get_board_rev(void)
> >> +{
> >> + return 0x63000 ;
> >> +}
> >> +#endif
> >> +
> >>
> >> #ifdef CONFIG_MXC_SPI
> >> iomux_v3_cfg_t ecspi1_pads[] = {
> >>
> >> /* SS1 */
> >>
> >> diff --git a/include/configs/mx6qsabrelite.h
> >> b/include/configs/mx6qsabrelite.h index 93000f0..85f6f7a 100644
> >> --- a/include/configs/mx6qsabrelite.h
> >> +++ b/include/configs/mx6qsabrelite.h
> >> @@ -33,6 +33,7 @@
> >>
> >> #define CONFIG_CMDLINE_TAG
> >> #define CONFIG_SETUP_MEMORY_TAGS
> >> #define CONFIG_INITRD_TAG
> >>
> >> +#define CONFIG_REVISION_TAG
> >
> > I think you can avoid this define altogether, you're using it anyway.
>
> Hi Marek,
>
> I'm not sure I understand.
>
> I need to define CONFIG_REVISION_TAG in order to get bootm to add
> the tag:
> http://git.denx.de/?p=u-
boot.git;a=blob;f=arch/arm/lib/bootm.c;h=afa0093df
> 7620606ee12b4dc1dd2ee37adee347c;hb=master#l137
>
> I made get_board_rev() conditional so we can get rid of it if (once)
> we're only using DT kernels.

You have CONFIG_REVISION_TAG set unconditionally, so you don't need the macro
around that get_revision() function. I might be wrong.

M