linux-kernel - Re: [PATCH 0/3] clk: Add clock driver for DRA7 ATL (Audio Tracking Logic)

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Message-ID: <5358D5F8.3010401@ti.com>
Date:	Thu, 24 Apr 2014 12:14:32 +0300
From:	Peter Ujfalusi <peter.ujfalusi@...com>
To:	Tero Kristo <t-kristo@...com>,
	Mike Turquette <mturquette@...aro.org>
CC:	Benoit Cousson <bcousson@...libre.com>,
	Tony Lindgren <tony@...mide.com>, <devicetree@...r.kernel.org>,
	<linux-omap@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 0/3] clk: Add clock driver for DRA7 ATL (Audio Tracking
 Logic)

Hi Mike,

On 04/02/2014 04:55 PM, Peter Ujfalusi wrote:
> Hi,
> 
> Audio Tracking Logic is designed to be used by HD Radio
> applications to synchronize the audio output clocks to the
> baseband clock. ATL can be also used to track errors between
> two reference clocks (BWS, AWS) and generate a modulated
> clock output which averages to some desired frequency.
> 
> To be able to integrate the ATL provided clocks to the clock tree we need
> two types of DT binding:
> - DT clock nodes to represent the ATL clocks towards the CCF
> - binding for the ATL IP itself which is going to handle the hw
>   configuration
> 
> The reason for this type of setup is that ATL itself is a separate device
> in the SoC, it has it's own address space and clock domain. Other IPs can
> use the ATL generated clock as their functional clock (McASPs for example)
> and external components like audio codecs can also use the very same clock
> as their MCLK.
> 
> With setup pm_runtime can handle the ATL clock on demand of it's use and
> all the IP which needs ATL clock can be sure that it is enabled for them.
> 
> The first patch fixes the name of atl clkin3 node in dtsi file.

Can you take a look at this series?

Thanks,
Péter

> 
> Regards,
> Peter
> ---
> Peter Ujfalusi (3):
>   ARM: dts: dra7xx-clocks: Correct name for atl clkin3 clock
>   clk: Driver for DRA7 ATL (Audio Tracking Logic)
>   ARM: DTS: dra7/dra7xx-clocks: ATL related changes
> 
>  .../devicetree/bindings/clock/ti/dra7-atl.txt      |  97 +++++++
>  arch/arm/boot/dts/dra7.dtsi                        |  11 +
>  arch/arm/boot/dts/dra7xx-clocks.dtsi               |  38 +--
>  drivers/clk/ti/Makefile                            |   3 +-
>  drivers/clk/ti/clk-7xx.c                           |   2 +-
>  drivers/clk/ti/clk-dra7-atl.c                      | 313 +++++++++++++++++++++
>  include/dt-bindings/clk/ti-dra7-atl.h              |  40 +++
>  7 files changed, 483 insertions(+), 21 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/clock/ti/dra7-atl.txt
>  create mode 100644 drivers/clk/ti/clk-dra7-atl.c
>  create mode 100644 include/dt-bindings/clk/ti-dra7-atl.h
> 

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