From: tony@atomide.com (Tony Lindgren)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 5/5] clk: dt: binding for basic gate clock
Date: Wed, 4 Sep 2013 10:59:09 -0700 [thread overview]
Message-ID: <20130904175909.GB31541@atomide.com> (raw)
In-Reply-To: <CAD6h2NSr0cM_SWqniC30pYm0mCeziBOzVg-46-814qPMxUwDCQ@mail.gmail.com>
* Haojian Zhuang <haojian.zhuang@linaro.org> [130903 20:11]:
>
> We can see that it'll try to find static mapping. What's the static mapping?
> If we define iotable in machine driver, we have the static mapping, just like
> debug_ll. If we parse everything from DTS file, it'll always get a new virtual
> address from vm area. So it always create a new page mapping even for one
> register.
I may not follow you here.. But it seems that you've missing something with
the static mapping: It's found based on the physical address. So if you
create static mappings for your SoC with iotable_init(), those mappings
will be available everywhere including drivers when you do ioremap().
Regards,
Tony
WARNING: multiple messages have this Message-ID (diff)
From: Tony Lindgren <tony@atomide.com>
To: Haojian Zhuang <haojian.zhuang@linaro.org>
Cc: "Stephen Warren" <swarren@wwwdotorg.org>,
"Mike Turquette" <mturquette@linaro.org>,
"Kevin Hilman" <khilman@linaro.org>,
"Olof Johansson" <olof@lixom.net>,
"Arnd Bergmann" <arnd@arndb.de>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"Matt Sealey" <neko@bakuhatsu.net>,
"Stephen Boyd" <sboyd@codeaurora.org>,
"Tero Kristo" <t-kristo@ti.com>,
"Heiko Stübner" <heiko@sntech.de>,
devicetree@vger.kernel.org
Subject: Re: [PATCH v4 5/5] clk: dt: binding for basic gate clock
Date: Wed, 4 Sep 2013 10:59:09 -0700 [thread overview]
Message-ID: <20130904175909.GB31541@atomide.com> (raw)
In-Reply-To: <CAD6h2NSr0cM_SWqniC30pYm0mCeziBOzVg-46-814qPMxUwDCQ@mail.gmail.com>
* Haojian Zhuang <haojian.zhuang@linaro.org> [130903 20:11]:
>
> We can see that it'll try to find static mapping. What's the static mapping?
> If we define iotable in machine driver, we have the static mapping, just like
> debug_ll. If we parse everything from DTS file, it'll always get a new virtual
> address from vm area. So it always create a new page mapping even for one
> register.
I may not follow you here.. But it seems that you've missing something with
the static mapping: It's found based on the physical address. So if you
create static mappings for your SoC with iotable_init(), those mappings
will be available everywhere including drivers when you do ioremap().
Regards,
Tony
next prev parent reply other threads:[~2013-09-04 17:59 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-22 5:53 [PATCH v4 0/5] clk: dt: bindings for mux, divider & gate clocks Mike Turquette
2013-08-22 5:53 ` Mike Turquette
2013-08-22 5:53 ` [PATCH v4 1/5] clk: divider: replace bitfield width with mask Mike Turquette
2013-08-22 5:53 ` Mike Turquette
2013-08-22 5:53 ` [PATCH v4 2/5] clk: of: helper for determining number of parent clocks Mike Turquette
2013-08-22 5:53 ` Mike Turquette
2013-08-22 5:53 ` [PATCH v4 3/5] clk: dt: binding for basic multiplexer clock Mike Turquette
2013-08-22 5:53 ` Mike Turquette
2013-08-28 15:50 ` Kumar Gala
2013-08-28 15:50 ` Kumar Gala
2013-08-29 1:14 ` Mike Turquette
2013-08-29 1:14 ` Mike Turquette
2013-08-29 6:58 ` Tero Kristo
2013-08-29 6:58 ` Tero Kristo
2013-08-30 5:54 ` Tony Lindgren
2013-08-30 5:54 ` Tony Lindgren
2013-08-30 20:02 ` Kumar Gala
2013-08-30 20:02 ` Kumar Gala
2013-08-30 20:33 ` Mike Turquette
2013-08-30 20:33 ` Mike Turquette
2013-08-30 20:48 ` Kumar Gala
2013-08-30 20:48 ` Kumar Gala
2013-08-30 21:37 ` Stephen Warren
2013-08-30 21:37 ` Stephen Warren
2013-09-03 23:22 ` Mike Turquette
2013-09-03 23:22 ` Mike Turquette
2013-09-04 18:36 ` Stephen Warren
2013-09-04 18:36 ` Stephen Warren
2013-09-05 18:29 ` Mike Turquette
2013-09-05 18:29 ` Mike Turquette
2013-09-05 20:30 ` Stephen Warren
2013-09-05 20:30 ` Stephen Warren
2013-09-05 20:51 ` Sylwester Nawrocki
2013-09-05 20:51 ` Sylwester Nawrocki
2013-09-06 6:53 ` Tero Kristo
2013-09-06 6:53 ` Tero Kristo
2013-09-06 6:53 ` Tero Kristo
2013-09-06 19:01 ` Stephen Warren
2013-09-06 19:01 ` Stephen Warren
2013-09-07 4:15 ` Saravana Kannan
2013-09-07 4:15 ` Saravana Kannan
2013-09-07 12:27 ` Tomasz Figa
2013-09-07 12:27 ` Tomasz Figa
2013-08-22 5:53 ` [PATCH v4 4/5] clk: dt: binding for basic divider clock Mike Turquette
2013-08-22 5:53 ` Mike Turquette
2013-08-22 5:53 ` [PATCH v4 5/5] clk: dt: binding for basic gate clock Mike Turquette
2013-08-22 5:53 ` Mike Turquette
2013-08-30 1:45 ` Haojian Zhuang
2013-08-30 1:45 ` Haojian Zhuang
2013-08-30 20:06 ` Stephen Warren
2013-08-30 20:06 ` Stephen Warren
2013-09-04 3:03 ` Haojian Zhuang
2013-09-04 3:03 ` Haojian Zhuang
2013-09-04 17:59 ` Tony Lindgren [this message]
2013-09-04 17:59 ` Tony Lindgren
2013-09-07 11:56 ` Tomasz Figa
2013-09-07 11:56 ` Tomasz Figa
2013-08-29 18:23 ` [PATCH v4 0/5] clk: dt: bindings for mux, divider & gate clocks Santosh Shilimkar
2013-08-29 18:23 ` Santosh Shilimkar
2013-08-29 18:23 ` Santosh Shilimkar
2013-08-30 7:05 ` Tero Kristo
2013-08-30 7:05 ` Tero Kristo
2013-08-30 7:05 ` Tero Kristo
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