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authorJohn Schmoller <jschmoller@xes-inc.com>2010-12-02 11:43:10 -0600
committerKumar Gala <galak@kernel.crashing.org>2010-12-13 09:32:15 -0600
commit9fd84915a92058b775fcc8fad4ab4e59fe51cf17 (patch)
tree4c08894e72fa0a94d71365391ac9d8db226795f6 /board/atmel
parent72c96a6802d9b1c949785d1d152f8bc8666c753d (diff)
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fsl_upm: Add MxMR/MDR synchronization
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 <jschmoller@xes-inc.com> Signed-off-by: Peter Tyser <ptyser@xes-inc.com> Acked-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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