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author | Ed Swarthout <Ed.Swarthout@freescale.com> | 2013-03-25 07:40:09 +0000 |
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committer | Andy Fleming <afleming@freescale.com> | 2013-05-24 16:54:11 -0500 |
commit | 428ea86c646fd9b485bfb015cd6293e345e6bb3e (patch) | |
tree | 1e04c819590e93ddde96eba2f95deb6c41a82f93 /doc/README.nand-boot-ppc440 | |
parent | 1b294b7a932aa89c5991e8b200616934849dc3c6 (diff) | |
download | u-boot-imx-428ea86c646fd9b485bfb015cd6293e345e6bb3e.zip u-boot-imx-428ea86c646fd9b485bfb015cd6293e345e6bb3e.tar.gz u-boot-imx-428ea86c646fd9b485bfb015cd6293e345e6bb3e.tar.bz2 |
powerpc/qixis: add clock measurement registers
QIXIS includes frequency measurement functions for each major processor
clock input. After reset (and after clocks are stable), QIXIS measures
the clocks against a reference frequency and stores the results in
CLK_FREQ registers. A base register supplies a multiplier which allows
directly obtaining the measured value, without requiring knowledge of
the target system or QIXIS core frequency.
Signed-off-by: Ed Swarthout <Ed.Swarthout@freescale.com>
Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
Diffstat (limited to 'doc/README.nand-boot-ppc440')
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