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From: David Brownell <david-b@pacbell.net>
To: "Russell King - ARM Linux" <linux@arm.linux.org.uk>
Cc: Paul Walmsley <paul@pwsan.com>,
	linux-arm-kernel@lists.arm.linux.org.uk,
	linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org,
	Tony Lindgren <tony@atomide.com>
Subject: Re: [PATCH E 10/14] OMAP clock: support "dry run" rate and parent changes
Date: Sun, 8 Feb 2009 11:48:58 -0800	[thread overview]
Message-ID: <200902081148.59158.david-b@pacbell.net> (raw)
In-Reply-To: <20090208131734.GA21434@n2100.arm.linux.org.uk>

On Sunday 08 February 2009, Russell King - ARM Linux wrote:
> A far better way to approach this would be to split the set_rate/recalc
> functionality into two parts:
> 
> 1. a method which returns the both the new clock rate and the hardware
>    programming information
> 2. a method to commit the hardware programming information to the registers

Much simpler to just pass a "commit" flag and not
try to come up with some generic way to represent
"hardware programming information"; in general that
will be very different between clocks.

Then clk_round_rate() passes "false" for commit,
while clk_set_rate() passes "true".  And in both
cases the value returned is the rate, or negative
errno to indicate a fault.

- Dave

  reply	other threads:[~2009-02-08 19:49 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-01-28 19:27 [PATCH E 00/14] OMAP clock, E of F: SDRAM fixes, clock optimization Paul Walmsley
2009-01-28 19:27 ` [PATCH E 01/14] OMAP2 SDRC: move mach-omap2/memory.h into include/asm-arm/arch-omap/sdrc.h Paul Walmsley
2009-01-28 19:27 ` [PATCH E 02/14] OMAP2 SDRC: rename memory.c to sdrc2xxx.c Paul Walmsley
2009-01-28 19:27 ` [PATCH E 03/14] OMAP2 SDRC: separate common OMAP2/3 code from OMAP2xxx code Paul Walmsley
2009-01-28 19:27 ` [PATCH E 04/14] OMAP2 SDRC: add SDRAM timing parameter infrastructure Paul Walmsley
2009-01-28 19:27 ` [PATCH E 05/14] OMAP3 clock: add omap3_core_dpll_m2_set_rate() Paul Walmsley
2009-01-28 19:27 ` [PATCH E 06/14] PM: OMAP3: Make sure clk_disable_unused() order is correct Paul Walmsley
2009-01-28 19:27 ` [PATCH E 07/14] OMAP2/3 clock: use standard set_rate fn in omap2_clk_arch_init() Paul Walmsley
2009-01-28 19:27 ` [PATCH E 08/14] OMAP clock: move rate recalc, propagation code up to plat-omap/clock.c Paul Walmsley
2009-01-29 17:41   ` Russell King - ARM Linux
2009-01-30  8:42     ` Paul Walmsley
2009-01-30  8:52       ` Russell King - ARM Linux
2009-01-30 14:23         ` Woodruff, Richard
2009-01-31 11:40           ` Russell King - ARM Linux
2009-02-03  8:42             ` Paul Walmsley
2009-02-03  9:45             ` Paul Walmsley
2009-02-02  7:13       ` Paul Walmsley
2009-02-03 13:18         ` Russell King - ARM Linux
2009-01-28 19:27 ` [PATCH E 09/14] OMAP2/3 clock: drop recalc function pointers from fixed rate clocks Paul Walmsley
2009-01-28 19:27 ` [PATCH E 10/14] OMAP clock: support "dry run" rate and parent changes Paul Walmsley
2009-02-08 13:17   ` Russell King - ARM Linux
2009-02-08 19:48     ` David Brownell [this message]
2009-02-11  7:53     ` Paul Walmsley
2009-02-08 15:53   ` Russell King - ARM Linux
2009-02-11  8:18     ` Paul Walmsley
2009-01-28 19:27 ` [PATCH E 11/14] OMAP clock: track child clocks Paul Walmsley
2009-01-29 15:14   ` Russell King - ARM Linux
2009-01-29 22:06     ` Russell King - ARM Linux
2009-01-30  8:35       ` Paul Walmsley
2009-02-02  4:57       ` Paul Walmsley
2009-02-09 14:11       ` Russell King - ARM Linux
2009-02-13  7:01         ` Paul Walmsley
2009-02-14 11:23           ` Russell King - ARM Linux
2009-02-14 11:36             ` Russell King - ARM Linux
2009-02-25  9:45               ` Paul Walmsley
2009-02-19 12:19             ` Russell King - ARM Linux
2009-02-20  0:50               ` Woodruff, Richard
2009-02-23 16:03                 ` Russell King - ARM Linux
2009-02-24 12:35                   ` Woodruff, Richard
2009-03-02 23:02                   ` Paul Walmsley
2009-03-03 16:45                     ` Russell King - ARM Linux
2009-02-22 23:37             ` Paul Walmsley
2009-02-24  9:43               ` Russell King - ARM Linux
2009-01-29 19:52   ` Russell King - ARM Linux
2009-02-02  7:57     ` Paul Walmsley
2009-01-28 19:28 ` [PATCH E 12/14] OMAP clock: unnecessary clock flag removal fiesta Paul Walmsley
2009-02-23 15:50   ` Russell King - ARM Linux
2009-03-02 22:35     ` Paul Walmsley
2009-01-28 19:28 ` [PATCH E 13/14] OMAP2/3 clock: remove clk->owner Paul Walmsley
2009-01-28 19:28 ` [PATCH E 14/14] OMAP clock: rearrange clock.h structure order Paul Walmsley

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