linux-kernel - Re: [RFC v2 5/8] ARM: tegra: Add auxiliary data for nvhost

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Message-ID: <50B4F5B6.6000008@wwwdotorg.org>
Date:	Tue, 27 Nov 2012 10:17:42 -0700
From:	Stephen Warren <swarren@...dotorg.org>
To:	Terje Bergström <tbergstrom@...dia.com>
CC:	"thierry.reding@...onic-design.de" <thierry.reding@...onic-design.de>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Arto Merilainen <amerilainen@...dia.com>
Subject: Re: [RFC v2 5/8] ARM: tegra: Add auxiliary data for nvhost

On 11/26/2012 11:33 PM, Terje Bergström wrote:
> On 27.11.2012 01:39, Stephen Warren wrote:
>> Clock names shouldn't be passed in platform data; instead, clk_get()
>> should be passed the device object and device-relative (i.e. not global)
>> clock name. I expect if the driver is fixed to make this change, the
>> changes to tegra*_clocks_data.c won't be needed either.
> 
> Isn't this code doing exactly that - getting a device relative clock,
> nvhost_module_init() in nvhost.acm.c:
> 
> (...)
> 	/* initialize clocks to known state */
> 	while (pdata->clocks[i].name && i < NVHOST_MODULE_MAX_CLOCKS) {
> 		long rate = pdata->clocks[i].default_rate;
> 		struct clk *c;
> 
> 		c = devm_clk_get(&dev->dev, pdata->clocks[i].name);

The line above is getting the (device-relative) clock name from platform
data, rather than using some fixed name as it should be.
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