linux-kernel - Re: [PATCH] Add support for power

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Date:	Tue, 1 Jul 2008 14:32:32 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Dmitry Baryshkov <dbaryshkov@...il.com>
Cc:	linux-kernel@...r.kernel.org, cbou@...l.ru, dwmw2@...radead.org
Subject: Re: [PATCH] Add support for power_supply on tosa

On Fri, 20 Jun 2008 12:49:17 +0400
Dmitry Baryshkov <dbaryshkov@...il.com> wrote:

> Support the battery management on Sharp Zaurus SL-6000.
> 
> This patch depends on the tc6393xb support as found in the arm:devel
> or linux-next trees.

Which means that Anton can't really merge it into his tree, I guess. 
I'll babysit it untilthe appropriate time.


> +static unsigned long tosa_read_bat(struct tosa_bat *bat)
> +{
> +	unsigned long value = 0;
> +
> +	if (bat->gpio_bat < 0 || bat->adc_bat < 0)
> +		return 0;
> +
> +	mutex_lock(&bat_lock);
> +	gpio_set_value(bat->gpio_bat, 1);
> +	mdelay(5);

msleep() is preferred over a busywait.

> +	value = wm97xx_read_aux_adc(bat->psy.dev->parent->driver_data,
> +			bat->adc_bat);
> +	gpio_set_value(bat->gpio_bat, 0);
> +	mutex_unlock(&bat_lock);
> +
> +	value = value * 1000000 / bat->adc_bat_divider;
> +
> +	return value;
> +}
> +
> +static unsigned long tosa_read_temp(struct tosa_bat *bat)
> +{
> +	unsigned long value = 0;
> +
> +	if (bat->gpio_temp < 0 || bat->adc_temp < 0)
> +		return 0;
> +
> +	mutex_lock(&bat_lock);
> +	gpio_set_value(bat->gpio_temp, 1);
> +	mdelay(5);

ditto. (and elsewhere)

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