linux-kernel - Re: [PATCH RESEND v2] mfd/ab8500: print switch off cause

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Date:	Mon, 04 Jun 2012 01:17:23 -0700
From:	Joe Perches <joe@...ches.com>
To:	Linus Walleij <linus.walleij@...ricsson.com>
Cc:	Samuel Ortiz <sameo@...ux.intel.com>, linux-kernel@...r.kernel.org,
	Jonas Aaberg <jonas.aberg@...ricsson.com>,
	Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH RESEND v2] mfd/ab8500: print switch off cause

On Mon, 2012-06-04 at 10:10 +0200, Linus Walleij wrote:
> From: Jonas Aaberg <jonas.aberg@...ricsson.com>
> 
> Instead of just printing the register value, also output some
> description of the value.
> 
> Signed-off-by: Jonas Aaberg <jonas.aberg@...ricsson.com>
> Reviewed-by: Mattias Wallin <mattias.wallin@...ricsson.com>
> Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
> ---
> Sam, this seems to have gone missing in the v3.5 merge window,
> it was sent out and IIRC accepted. Anyway, no big deal but
> consider pushing this for the -rc:s.
> 
> ChangeLog v1->v2:
> - Print each cause on its own line with a tab to avoid missing
>   initial cause heading if loglevel < info.
> ---
>  drivers/mfd/ab8500-core.c |   25 ++++++++++++++++++++++++-
>  1 file changed, 24 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mfd/ab8500-core.c b/drivers/mfd/ab8500-core.c
> index dac0e29..6c81dc0 100644
> --- a/drivers/mfd/ab8500-core.c
> +++ b/drivers/mfd/ab8500-core.c
> @@ -1217,6 +1217,15 @@ static const struct of_device_id ab8500_match[] = {
>  
>  static int __devinit ab8500_probe(struct platform_device *pdev)
>  {
> +	static char *switch_off_status[] = {
> +		"Swoff bit programming",
> +		"Thermal protection activation",
> +		"Vbat lower then BattOk falling threshold",
> +		"Watchdog expired",
> +		"Non presence of 32kHz clock",
> +		"Battery level lower than power on reset threshold",
> +		"Power on key 1 pressed longer than 10 seconds",
> +		"DB8500 thermal shutdown"};
>  	struct ab8500_platform_data *plat = dev_get_platdata(&pdev->dev);
>  	const struct platform_device_id *platid = platform_get_device_id(pdev);
>  	enum ab8500_version version = AB8500_VERSION_UNDEFINED;
> @@ -1323,7 +1332,21 @@ static int __devinit ab8500_probe(struct platform_device *pdev)
>  		AB8500_SWITCH_OFF_STATUS, &value);
>  	if (ret < 0)
>  		return ret;
> -	dev_info(ab8500->dev, "switch off status: %#x", value);
> +	dev_info(ab8500->dev, "switch off cause(s) (%#x): ", value);
> +
> +	if (value) {
> +		for (i = 0; i < ARRAY_SIZE(switch_off_status); i++) {
> +			if (value & 1)
> +				dev_info(ab8500->dev,
> +					 "\"\t%s\" ", switch_off_status[i]);

This should be printk with or without KERN_CONT

The tab use is also not necessary, a single space
or a comma would probably be better.

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