linux-kernel - Re: [RFC][PATCH 1/2] ARM: OMAP4: clock: Add device tree support for AUXCLKs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 9 Apr 2013 10:43:20 -0700
From:	Tony Lindgren <tony@...mide.com>
To:	Roger Quadros <rogerq@...com>
Cc:	"Menon, Nishanth" <nm@...com>, linux-usb@...r.kernel.org,
	linux@....linux.org.uk, devicetree-discuss@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org, balbi@...com,
	grygorii.strashko@...com, linux-omap@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [RFC][PATCH 1/2] ARM: OMAP4: clock: Add device tree support
 for AUXCLKs

* Tony Lindgren <tony@...mide.com> [130409 09:54]:
> * Roger Quadros <rogerq@...com> [130409 03:00]:
> > On 04/05/2013 06:58 PM, Tony Lindgren wrote:
> > > 
> > > Can't you just use the clock name there to get it?
> > 
> > In device tree we don't pass around clock names. You can either get
> > a phandle or an index to the clock.
> > 
> > e.g. Documentation/devicetree/bindings/clock/imx31-clock.txt
> 
> Yes I understand that. But the driver/clock/omap driver can just
> remap the DT device initially so the board specific clock is
> found from the clock alias table. Basically initially a passthrough
> driver that can be enhanced to parse DT clock bindings and load
> data from /lib/firmware.

Actually probably the driver/clock/omap can even do even less
initially. There probably even no need to remap clocks there.

As long as the DT clock driver understands that a board specific
auxclk is specified in the DT it can just call clk_add_alias() so
the driver will get the right auxclk from cclock44xx_data.c.

Then other features can be added later on like to allocate a
clock entirely based on the binding etc.

Regards,

Tony 
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/