On 22/08/2012 21:25, Matt Sealey wrote: > PCBID pads seem to need time to settle due to external pulldowns, otherwise > we are reading floating GPIO pins with implicit pad pullups and get the wrong > data. However we can't "wait" at the time we need them before relocation, > since timers are not available. The time taken to get from DCD to the code > requiring the pads set seems to be more than long enough (even with caches > enabled). > > We have space in the DCD due to the DDR settings changes to configure all > the pad settings we need for this, plus the LED pad settings too which > reduces the amount of code required later on. > > Signed-off-by: Matt Sealey <[email protected]> > --- > board/genesi/mx51_efikamx/imximage_mx.cfg | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/board/genesi/mx51_efikamx/imximage_mx.cfg > b/board/genesi/mx51_efikamx/imximage_mx.cfg > index ea6b271..38fa760 100644 > --- a/board/genesi/mx51_efikamx/imximage_mx.cfg > +++ b/board/genesi/mx51_efikamx/imximage_mx.cfg > @@ -45,6 +45,16 @@ BOOT_FROM spi > # Address absolute address of the register > # value value to be stored in the register > > +# Essential GPIO settings to be done as early as possible > +# PCBIDn pad settings are all the defaults except #2 which needs HVE off > +DATA 4 0x73fa8134 0x3 # PCBID0 ALT3 GPIO 3_16 > +DATA 4 0x73fa8130 0x3 # PCBID1 ALT3 GPIO 3_17 > +DATA 4 0x73fa8128 0x3 # PCBID2 ALT3 GPIO 3_11 > +DATA 4 0x73fa8504 0xe4 # PCBID2 PAD ~HVE > +DATA 4 0x73fa8198 0x3 # LED0 ALT3 GPIO 3_13 > +DATA 4 0x73fa81c4 0x3 # LED1 ALT3 GPIO 3_14 > +DATA 4 0x73fa81c8 0x3 # LED2 ALT3 GPIO 3_15 > + > # DDR bus IOMUX PAD settings > DATA 4 0x73fa850c 0x20c5 # SDODT1 > DATA 4 0x73fa8510 0x20c5 # SDODT0 >
Acked-by: Stefano Babic <[email protected]> Best regards, Stefano Babic -- ===================================================================== DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: [email protected] ===================================================================== _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
