On Dec 2, 2010, at 11:43 AM, Peter Tyser wrote: > From: John Schmoller <jschmol...@xes-inc.com> > > According to Freescale reference manuals (eg section "13.4.4.2 > Programming the UPMs" of the P4080 Reference Manual): > > "Since the result of any update to the MxMR/MDR register must be in > effect before the dummy read or write to the UPM region, a write to > MxMR/MDR should be followed immediately by a read of MxMR/MDR." > > The UPM on a custom P4080-based board did not work without performing > a read of MxMR/MDR after a write. > > Signed-off-by: John Schmoller <jschmol...@xes-inc.com> > Signed-off-by: Peter Tyser <pty...@xes-inc.com> > --- > drivers/mtd/nand/fsl_upm.c | 2 ++ > 1 files changed, 2 insertions(+), 0 deletions(-)
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