Hello Christian, Christian Riesch wrote: > Hello Heiko, > > On Mon, Sep 19, 2011 at 7:50 AM, Heiko Schocher <h...@denx.de> wrote: >> - booting from NOR Flash with direct boot method >> - POST support >> - LOGBUF support >> >> Signed-off-by: Heiko Schocher <h...@denx.de> >> Cc: Paulraj Sandeep <s-paul...@ti.com> >> Cc: Albert ARIBAUD <albert.u.b...@aribaud.net> >> Cc: Igor Grinberg <grinb...@compulab.co.il> >> --- >> - changes for v2 >> - use CONFIG_MACH_TYPE instead setting the MACH_TYPE in >> board specific code, as Igor Grinberg suggested. >> - add logversion=2 to default Environment >> >> board/enbw/enbw_cmc/Makefile | 51 ++++ >> board/enbw/enbw_cmc/enbw_cmc.c | 570 >> ++++++++++++++++++++++++++++++++++++++++ >> boards.cfg | 1 + >> include/configs/enbw_cmc.h | 443 +++++++++++++++++++++++++++++++ >> 4 files changed, 1065 insertions(+), 0 deletions(-) >> create mode 100644 board/enbw/enbw_cmc/Makefile >> create mode 100644 board/enbw/enbw_cmc/enbw_cmc.c >> create mode 100644 include/configs/enbw_cmc.h > > [...] > >> diff --git a/include/configs/enbw_cmc.h b/include/configs/enbw_cmc.h >> new file mode 100644 >> index 0000000..e203089 >> --- /dev/null >> +++ b/include/configs/enbw_cmc.h > > [...] > >> +#define CONFIG_SYS_AM1808_PLL0_PLLM 37 /* PLL0 -> 456 MHz */ > > With a 24 MHz input frequency this would result in a PLL0 frequency of > 24MHz / PREDIV * (CONFIG_SYS_AM1808_PLL0_PLLM + 1), so I guess you > assume a PREDIV of 2 here (PREDIV register value 0x00008001). However,
No. The comment is wrong! I fix the comment from PLL0 to PLLC0 in the next patch version, thanks! > the AM1808 datasheet and the reference guide (section 7.3.10) state > that the default PREDIV is 1 (register value 0x00008000) and I don't > see how you set the PREDIV to 2. Am I missing something here? For calculating the resulting frequencies for the used Sysclocks don;t forget the POSTDIV value #define CONFIG_SYS_AM1808_PLL0_POSTDIV 1 So the correct calculation is: (24MHz / PREDIV * (CONFIG_SYS_AM1808_PLL0_PLLM + 1)) / POSTDIV (And with that, I get 456 MHz ;-) bye, Heiko -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
