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authorPaul Walmsley <paul@pwsan.com>2010-02-22 22:09:12 -0700
committerPaul Walmsley <paul@pwsan.com>2010-02-24 12:15:03 -0700
commit93340a22943f3169de7d359ea14cd618114da6f6 (patch)
treee9736b9fb4e9f2fdd31491b2b7a5b3dfe60ed453 /.mailmap
parent7356f0b26b3176610b4de439e8c7bfe10c797347 (diff)
OMAP2/3/4 clock: fix DPLL multiplier value errors; also copyrights, includes, documentation
The maximum DPLL multiplier (M) values for OMAP2xxx and OMAP3xxx are one increment higher than they should be. See for example the OMAP242x TRM Rev X Section 5.10.6 "Clock Generator Registers" and the OMAP36xx TRM Rev C Table 3-202 "CM_CLKSEL1_PLL". Programming a 0 into the DPLL's M register bitfield is valid for OMAP2/3 and indicates that the DPLL should enter MN-bypass mode. Also, increase the minimum multiplier (M) value for the DPLL rate rounding code from 1 to 2, to ensure that it does not inadvertently put the DPLL into bypass. Note that the register documentation in the OMAP2xxx and OMAP3xxx TRMs does not make clear that the actual DPLL divider value (the "N") is the content of the appropriate register bitfield for the N value, _plus one_. (In other words, an N register bitfield of 0 indicates a DPLL divider value of 1.) This is only clearly documented in the OMAP4430 TRM, in, for example, OMAP4430 TRM Rev A Table 3-1167 "CM_CLKSEL_DPLL_USB". While here, update copyrights, add kerneldoc for struct dpll_data, drop the unused struct dpll_data.max_tolerance field, remove some unnecessary #includes in DPLL-related code, and replace the #include of <linux/module.h> with <linux/list.h>, which is what was really needed. The OMAP4 clock autogenerator script has been updated accordingly. Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: BenoƮt Cousson <b-cousson@ti.com> Cc: Rajendra Nayak <rnayak@ti.com>
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