linux-kernel - Re: [MeeGo-Dev][PATCH] Topcliff: Update PCH

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Date:	Tue, 31 Aug 2010 19:43:52 -0700
From:	Joe Perches <joe@...ches.com>
To:	Masayuki Ohtak <masa-korg@....okisemi.com>
Cc:	"Jean Delvare (PC drivers, core)" <khali@...ux-fr.org>,
	"Ben Dooks (embedded platforms)" <ben-linux@...ff.org>,
	Crane Cai <crane.cai@....com>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	Ralf Baechle <ralf@...ux-mips.org>,
	srinidhi kasagar <srinidhi.kasagar@...ricsson.com>,
	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
	"Wang Yong Y\"" <yong.y.wang@...el.com>,
	"Wang Qi\"" <qi.wang@...el.com>,
	"Andrew\"" <andrew.chih.howe.khor@...el.com>,
	arjan@...ux.intel.com,
	Tomoya MORINAGA <morinaga526@....okisemi.com>,
	Arnd Bergmann <arnd@...db.de>
Subject: Re: [MeeGo-Dev][PATCH] Topcliff: Update PCH_I2C driver to 2.6.35

On Wed, 2010-09-01 at 11:26 +0900, Masayuki Ohtak wrote:
> I2C driver of Topcliff PCH
> +++ b/drivers/i2c/busses/i2c-pch.c
[]
> +static void pch_init(struct i2c_algo_pch_data *adap)
[]
> +	if (pch_i2c_speed == FAST_MODE_CLK) {
> +		reg_value |= FAST_MODE_EN;
> +		dev_dbg(adap->pch_adapter.dev.parent, "Fast mode enabled\n");
> +	}

Just a suggestion below, ignore it at your pleasure...

These dev_<level> calls might be easier to read if you had
some #defines like:

#define pch_dbg(adap, fmt, arg...)		\
	dev_dbg(adap->pch_adapter.dev.parent, fmt, ##arg)
#define pch_err(adap, fmt, arg...)		\
	dev_err(adap->pch_adapter.dev.parent, fmt, ##arg)
#define pch_info(adap, fmt, arg...)		\
	dev_info(adap->pch_adapter.dev.parent, fmt, ##arg)

then the last dev_dbg becomes:

		pch_dbg(adap, "Fast mode enabled\n");

Many modules use similar wrapper #defines.

> +	dev_dbg(adap->pch_adapter.dev.parent,
> +		"%s: I2CCTL=%x pch_i2cbc=%x pch_i2ctmr=%x Enable interrupts\n",
> +		__func__, ioread32(p + PCH_I2CCTL),
> +		pch_i2cbc, pch_i2ctmr);

	pch_dbg(adap, etc...)

etc.

cheers, Joe

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