From: khilman@deeprootsystems•com (Kevin Hilman)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCHv4 8/8] ARM: OMAP3: do not delete per_clkdm autodeps during idle
Date: Wed, 19 Sep 2012 15:15:11 -0700 [thread overview]
Message-ID: <87k3vpek28.fsf@deeprootsystems.com> (raw)
In-Reply-To: <alpine.DEB.2.00.1209182241400.4747@utopia.booyaka.com> (Paul Walmsley's message of "Tue, 18 Sep 2012 22:43:52 +0000 (UTC)")
Paul Walmsley <paul@pwsan•com> writes:
> On Tue, 18 Sep 2012, Paul Walmsley wrote:
>
>> What do you think about the following patch to handle part of the i582
>> workaround?
>
> That patch was an older version; here's one that builds and boots - sorry
> about that. It passed the basic PM tests here on 3730ES1.0 Beagle XM and
> 3730ES1.2 EVM.
>
> Kevin, care to ack it if you're happy with it? We still need to get the
> other parts of the i582 workaround into place, of course...
>
>
> - Paul
>
> From: Paul Walmsley <paul@pwsan•com>
> Date: Tue, 18 Sep 2012 16:02:38 -0600
> Subject: [PATCH] ARM: OMAP36xx: PM: apply part of the erratum i582 workaround
>
> On OMAP36xx chips with ES < 1.2, if the PER powerdomain goes to OSWR
> or OFF while CORE stays at CSWR or ON, or if, upon chip wakeup from
> OSWR or OFF, the CORE powerdomain goes ON before PER, the UART3/4
> FIFOs and McBSP2/3 SIDETONE memories will be unusable. This is
> erratum i582 in the OMAP36xx Silicon Errata document.
>
> This patch implements one of several parts of the workaround: the
> addition of the wakeup dependency between the PER and WKUP
> clockdomains, such that PER will wake up at the same time CORE_L3
> does.
>
> This is not a complete workaround. For it to be complete:
>
> 1. the PER powerdomain's next power state must not be set to OSWR or
> OFF if the CORE powerdomain's next power state is set to CSWR or
> ON;
>
> 2. the UART3/4 FIFO and McBSP2/3 SIDETONE loopback tests should be run
> if the LASTPOWERSTATEENTERED bits for PER and CORE indicate that
> PER went OFF while CORE stayed on. If loopback tests fail, then
> those devices will be unusable until PER and CORE can undergo a
> transition from ON to OSWR/OFF and back ON.
>
> Signed-off-by: Paul Walmsley <paul@pwsan•com>
> Cc: Tero Kristo <t-kristo@ti•com>
> Cc: Kevin Hilman <khilman@ti•com>
Acked-by: Kevin Hilman <khilman@ti•com>
next prev parent reply other threads:[~2012-09-19 22:15 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-13 14:19 [PATCHv4 0/8] ARM: OMAP: pm: usecounting changes Tero Kristo
2012-07-13 14:19 ` [PATCHv4 1/8] ARM: OMAP: clk: add support for omap_clk_for_each Tero Kristo
2012-07-16 10:04 ` Rajendra Nayak
2012-07-16 11:42 ` Tero Kristo
2012-07-13 14:19 ` [PATCHv4 2/8] ARM: OMAP3+: voltage/pwrdm/clkdm/clock add recursive usecount tracking Tero Kristo
2012-07-16 10:15 ` Rajendra Nayak
2012-07-27 19:14 ` Kevin Hilman
2012-08-06 23:31 ` Kevin Hilman
2012-09-07 9:23 ` Tero Kristo
2012-07-13 14:19 ` [PATCHv4 3/8] ARM: OMAP3+: voltage: add support for voltagedomain usecounts Tero Kristo
2012-07-16 10:23 ` Rajendra Nayak
2012-07-24 20:58 ` Vishwanath Sripathy
2012-07-25 8:07 ` Tero Kristo
2012-07-13 14:19 ` [PATCHv4 4/8] ARM: OMAP3: add manual control for mpu / core pwrdm usecounting Tero Kristo
2012-07-16 10:30 ` Rajendra Nayak
2012-07-27 19:36 ` Kevin Hilman
2012-07-30 8:40 ` Tero Kristo
2012-08-06 10:14 ` Jean Pihet
2012-09-07 9:30 ` Tero Kristo
2012-09-07 21:48 ` Kevin Hilman
2012-08-06 23:32 ` Kevin Hilman
2012-07-13 14:19 ` [PATCHv4 5/8] ARM: OMAP3: set autoidle flag for sdrc_ick Tero Kristo
2012-07-16 10:39 ` Rajendra Nayak
2012-07-13 14:19 ` [PATCHv4 6/8] ARM: OMAP: pm-debug: enhanced usecount debug support Tero Kristo
2012-07-16 10:50 ` Rajendra Nayak
2012-07-16 11:45 ` Tero Kristo
2012-07-16 12:14 ` Rajendra Nayak
2012-07-27 19:55 ` Kevin Hilman
2012-07-30 8:36 ` Tero Kristo
2012-07-13 14:19 ` [PATCHv4 7/8] ARM: OMAP: clockdomain: add support for preventing autodep delete Tero Kristo
2012-07-16 11:00 ` Rajendra Nayak
2012-07-17 14:56 ` Tero Kristo
2012-07-17 21:31 ` Paul Walmsley
2012-07-18 7:15 ` Rajendra Nayak
2012-07-18 8:05 ` Tero Kristo
2012-07-18 9:04 ` Rajendra Nayak
2012-07-18 9:16 ` Tero Kristo
2012-07-27 20:12 ` Kevin Hilman
2012-07-13 14:19 ` [PATCHv4 8/8] ARM: OMAP3: do not delete per_clkdm autodeps during idle Tero Kristo
2012-09-18 22:25 ` Paul Walmsley
2012-09-18 22:43 ` Paul Walmsley
2012-09-19 22:15 ` Kevin Hilman [this message]
2012-10-16 7:29 ` Paul Walmsley
2012-10-17 0:39 ` Kevin Hilman
2012-10-31 11:59 ` Tero Kristo
2012-09-19 9:06 ` Tero Kristo
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