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From: Marc Kleine-Budde <mkl@pengutronix.de>
Subject: Re: [PATCH v3 11/31] net: can: mscan: improve clock API use
Date: Mon, 22 Jul 2013 14:31:21 +0200
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To: Gerhard Sittig <gsi@denx.de>
Cc: Mike Turquette <mturquette@linaro.org>, Detlev Zundel <dzu@denx.de>, Wolfram Sang <wsa@the-dreams.de>, David Woodhouse <dwmw2@infradead.org>, devicetree-discuss@lists.ozlabs.org, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Rob Herring <rob.herring@calxeda.com>, Mark Brown <broonie@kernel.org>, Wolfgang Grandegger <wg@grandegger.com>, Anatolij Gustschin <agust@denx.de>, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, Mauro Carvalho Chehab <m.chehab@samsung.com>
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On 07/22/2013 02:14 PM, Gerhard Sittig wrote:
> the .get_clock() callback is run from probe() and might allocate
> resources, introduce a .put_clock() callback that is run from remove()
> to undo any allocation activities

looks good

> use devm_get_clk() upon lookup (for SYS and REF) to have the clocks put=

> upon driver unload

fine

> assume that resources get prepared but not necessarily enabled in the
> setup phase, make the open() and close() callbacks of the CAN network
> device enable and disable a previously acquired and prepared clock

I think you should call prepare_enable and disable_unprepare in the
open/close functions.

Marc

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Pengutronix e.K.                  | Marc Kleine-Budde           |
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