linux-kernel - Re: [PATCH] Remove tosa_battery driver (was: Re: [PATCH] tosa_battery: fix FTBFS bug due to driver

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Date:	Mon, 3 May 2010 00:12:02 +0400
From:	Anton Vorontsov <cbouatmailru@...il.com>
To:	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	David Woodhouse <dwmw2@...radead.org>,
	Marek Vasut <marek.vasut@...il.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] Remove tosa_battery driver (was: Re: [PATCH]
 tosa_battery: fix FTBFS bug due to driver_data access)

On Sat, May 01, 2010 at 12:40:54AM +0400, Dmitry Eremin-Solenikov wrote:
[...]
> >> Ah, it appears to be a build fix.
> >
> > It seems that the driver isn't buildable since 2.6.32
> > (i.e. commit b4028437 "Driver core: move dev_get/set_drvdata to
> > drivers/base/dd.c").
> >
> > Also, IIRC it was deprecated in favor of wm97xx_battery.c
> > driver.
> >
> > So, I'm not picking this patch for 2.6.34, it's not a
> > new regression, and the driver is probably needs to be
> > removed.
> >
> > Any objections on the patch down below?
> 
> Yes. wm97xx_battery handles only one battery, while tosa uses 3
> different batterires.
> So, wm97xx_battery needs to be adapted/enhanced.

Eh. I see, thanks for making this clear. I added some changelog
and applied the following patch to battery-2.6.git:

- - -
From: Dmitry Eremin-Solenikov <dbaryshkov@...il.com>
Date: Tue, 27 Apr 2010 17:18:22 +0400
Subject: [PATCH] tosa_battery: Fix build error due to direct driver_data usage

The driver isn't buildable since 2.6.32 (i.e. commit b4028437
"Driver core: move dev_get/set_drvdata to drivers/base/dd.c"):

  CC      tosa_battery.o
tosa_battery.c: In function 'tosa_read_bat':
tosa_battery.c:64: error: 'struct device' has no member named 'driver_data'
tosa_battery.c: In function 'tosa_read_temp':
tosa_battery.c:84: error: 'struct device' has no member named 'driver_data'

Nowadays we must not access driver_data directly, use dev_get_drvdata()
instead.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@...il.com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Anton Vorontsov <cbouatmailru@...il.com>
---
 drivers/power/tosa_battery.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/power/tosa_battery.c b/drivers/power/tosa_battery.c
index 2eab35a..ee04936 100644
--- a/drivers/power/tosa_battery.c
+++ b/drivers/power/tosa_battery.c
@@ -61,7 +61,7 @@ static unsigned long tosa_read_bat(struct tosa_bat *bat)
 	mutex_lock(&bat_lock);
 	gpio_set_value(bat->gpio_bat, 1);
 	msleep(5);
-	value = wm97xx_read_aux_adc(bat->psy.dev->parent->driver_data,
+	value = wm97xx_read_aux_adc(dev_get_drvdata(bat->psy.dev->parent),
 			bat->adc_bat);
 	gpio_set_value(bat->gpio_bat, 0);
 	mutex_unlock(&bat_lock);
@@ -81,7 +81,7 @@ static unsigned long tosa_read_temp(struct tosa_bat *bat)
 	mutex_lock(&bat_lock);
 	gpio_set_value(bat->gpio_temp, 1);
 	msleep(5);
-	value = wm97xx_read_aux_adc(bat->psy.dev->parent->driver_data,
+	value = wm97xx_read_aux_adc(dev_get_drvdata(bat->psy.dev->parent),
 			bat->adc_temp);
 	gpio_set_value(bat->gpio_temp, 0);
 	mutex_unlock(&bat_lock);
-- 
1.7.0.5

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