From: Mark Brown <broonie@opensource.wolfsonmicro.com>
To: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, Len Brown <lenb@kernel.org>,
"Rafael J. Wysocki" <rjw@sisk.pl>,
Mike Turquette <mturquette@linaro.org>,
Arnd Bergmann <arnd@arndb.de>,
Linus Walleij <linus.walleij@linaro.org>,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
linux-acpi@vger.kernel.org
Subject: Re: [PATCH 2/3] clk: x86: add support for Lynxpoint LPSS clocks
Date: Tue, 15 Jan 2013 12:11:19 +0900 [thread overview]
Message-ID: <20130115031118.GC5701@opensource.wolfsonmicro.com> (raw)
In-Reply-To: <1358174788-24439-3-git-send-email-mika.westerberg@linux.intel.com>
On Mon, Jan 14, 2013 at 04:46:27PM +0200, Mika Westerberg wrote:
> Intel Lynxpoint Low Power Subsystem hosts peripherals like UART, I2C and
> SPI controllers. For most of these there is a configuration register that
> allows software to enable and disable the functional clock. Disabling the
> clock while the peripheral is not used saves power.
>
> In order to take advantage of this we add a new clock gate of type
> 'lpss_gate' that just re-uses the ordinary clk_gate but in addition is able
> to enumerate the base address register of the device using ACPI.
>
> We then create a clock tree that models the Lynxpoint LPSS clocks using
> these gates and fixed clocks so that we can pass clock rate to the drivers
> as well.
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
next prev parent reply other threads:[~2013-01-15 3:11 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-14 14:46 [PATCH 0/3] x86: enable common clk and add support for Lynxpoint clocks Mika Westerberg
2013-01-14 14:46 ` [PATCH 1/3] x86: enable common clk on x86 Mika Westerberg
2013-01-15 23:59 ` Rafael J. Wysocki
2013-01-16 5:20 ` Mika Westerberg
2013-01-16 15:01 ` Rafael J. Wysocki
2013-01-16 15:28 ` Mika Westerberg
2013-01-17 22:38 ` Rafael J. Wysocki
2013-01-14 14:46 ` [PATCH 2/3] clk: x86: add support for Lynxpoint LPSS clocks Mika Westerberg
2013-01-15 3:11 ` Mark Brown [this message]
2013-01-14 14:46 ` [PATCH 3/3] ACPI: create Lynxpoint clocks if LPSS devices are found during scan Mika Westerberg
2013-01-17 23:07 ` Rafael J. Wysocki
2013-01-15 5:27 ` [PATCH 0/3] x86: enable common clk and add support for Lynxpoint clocks Mika Westerberg
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