Hi Igor. On Thu, Mar 1, 2012 at 12:41 AM, Igor Grinberg <grinb...@compulab.co.il>wrote:
> Hi Jonathan, > > On 02/29/12 22:52, Jonathan Solnit wrote: > > The OMAP ROM code modifies the GBPR1 register, which can cause > > s/GBPR1/GPBR1/ > > > unintended consequences. > > What do you mean by this? > Can you please elaborate, what issues do you see? > Also, why does the OMAP ROM code needs to touch the GPBR1? > > For my board, when booting the OMAP3 from MMC1, GPBR1 comes up as 0x00 instead of 0x90. The improper clock configuration causes timeouts whenever I try to use the MADC. In Linux, the error looks like this: user.err kernel: twl4030_madc twl4030_madc: conversion timeout! As for why ROM touches GPBR1, only TI can answer that. What I've found is that this is a known issue and re-initializing the register at start-up is the recommended solution: http://e2e.ti.com/support/power_management/pmu/f/43/t/762.aspx Thanks, Jonathan
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