linux-kernel - Re: [PATCH v1 2/2] mfd: Introduce QTI I2C PMIC controller

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Date:   Thu, 30 Apr 2020 18:18:18 -0700
From:   Joe Perches <joe@...ches.com>
To:     Guru Das Srinagesh <gurus@...eaurora.org>,
        Lee Jones <lee.jones@...aro.org>
Cc:     devicetree@...r.kernel.org,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Subbaraman Narayanamurthy <subbaram@...eaurora.org>,
        David Collins <collinsd@...eaurora.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 2/2] mfd: Introduce QTI I2C PMIC controller

On Thu, 2020-04-30 at 18:13 -0700, Guru Das Srinagesh wrote:
> On Wed, Apr 29, 2020 at 08:50:10AM +0100, Lee Jones wrote:
> > On Tue, 28 Apr 2020, Guru Das Srinagesh wrote:
> > > The Qualcomm Technologies, Inc. I2C PMIC Controller is used by
> > > multi-function PMIC devices which communicate over the I2C bus.  The
> > > controller enumerates all child nodes as platform devices, and
> > > instantiates a regmap interface for them to communicate over the I2C
> > > bus.
[]
> > > diff --git a/drivers/mfd/qcom-i2c-pmic.c b/drivers/mfd/qcom-i2c-pmic.c
[]
> > Please don't role your own debug helpers.
> > 
> > The ones the kernel provides are suitably proficient.
> 
> Sure. Would this be acceptable instead, with the custom string replaced by a
> macro that the kernel provides?
> 
> 	#define pr_fmt(fmt) "%s: %s: " fmt, KBUILD_MODNAME, __func__

trivia:

It's almost always smaller object code to use
the KBUILD_MODNAME as a fixed string instead of
as a printf argument.

	#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__