Hi Paul,
On 9/28/2011 1:59, Paul Walmsley wrote:
Hi Jon and Mike,
On Fri, 16 Sep 2011, Jon Hunter wrote:
From: Mike Turquette<mturquette@xxxxxx>
OMAP4 DPLL_ABE can enable a 4X multipler on top of the normal MN multipler
and divider. This is achieved by setting CM_CLKMODE_DPLL_ABE.DPLL_REGM4XEN
bit in CKGEN module of CM1. From the OMAP4 TRM:
Fdpll = Fref x 2 x (4 x M/(N+1)) in case REGM4XEN bit field is set (only
applicable to DPLL_ABE).
Add new round_rate() and recalc() functions for OMAP4, that check the
setting of REGM4XEN bit and handle this appropriately. The new functions
are a simple wrapper on top of the existing omap2_dpll_round_rate() and
omap2_dpll_get_rate() functions to handle the REGM4XEN bit.
The REGM4XEN bit is only implemented for the ABE DPLL on OMAP4 and so
only dpll_abe_ck uses omap4_dpll_regm4xen_round_rate() and
omap4_dpll_regm4xen_recalc() functions.
Signed-off-by: Mike Turquette<mturquette@xxxxxx>
Tested-by: Jon Hunter<jon-hunter@xxxxxx>
Some changes have been made to this patch here, to fix a few minor bugs in
error paths and to add documentation and Jon's Signed-off-by: (since he's
in the submittal chain).
Care to review and send any comments? Otherwise, I plan to queue this
revised version for 3.2.
Looks good to me. Thanks for fixes and documentation.
Cheers
Jon
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