linux-kernel - Re: [PATCH v3 08/14] Input: twl4030-vibra: Support for DT booted kernel

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Date:	Thu, 6 Sep 2012 09:19:33 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Peter Ujfalusi <peter.ujfalusi@...com>
Cc:	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Liam Girdwood <lrg@...com>, Tony Lindgren <tony@...mide.com>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	Tero Kristo <t-kristo@...com>, alsa-devel@...a-project.org,
	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	devicetree-discuss@...ts.ozlabs.org,
	Benoit Cousson <b-cousson@...com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 08/14] Input: twl4030-vibra: Support for DT booted
 kernel

Hi Peter,

On Thu, Sep 06, 2012 at 03:12:15PM +0300, Peter Ujfalusi wrote:
> Add support when the kernel has been booted with DT blob. In this case the
> pdata is NULL, we need to reach up to the core node and check if the codec
> part has been enabled to determine if we need to coexist with the codec or
> not.
> 
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...com>
> ---
>  drivers/input/misc/twl4030-vibra.c | 20 ++++++++++++++++++--
>  1 file changed, 18 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/input/misc/twl4030-vibra.c b/drivers/input/misc/twl4030-vibra.c
> index fc0ed9b..15620f8 100644
> --- a/drivers/input/misc/twl4030-vibra.c
> +++ b/drivers/input/misc/twl4030-vibra.c
> @@ -26,6 +26,7 @@
>  #include <linux/module.h>
>  #include <linux/jiffies.h>
>  #include <linux/platform_device.h>
> +#include <linux/of.h>
>  #include <linux/workqueue.h>
>  #include <linux/i2c/twl.h>
>  #include <linux/mfd/twl4030-audio.h>
> @@ -194,13 +195,28 @@ static int twl4030_vibra_resume(struct device *dev)
>  static SIMPLE_DEV_PM_OPS(twl4030_vibra_pm_ops,
>  			 twl4030_vibra_suspend, twl4030_vibra_resume);
>  
> +static bool twl4030_vibra_check_coexist(struct twl4030_vibra_data *pdata,
> +			      struct device_node *node)
> +{
> +	if (pdata && pdata->coexist)
> +		return true;
> +
> +#ifdef CONFIG_OF
> +	if (of_find_node_by_name(node, "codec"))
> +		return true;
> +#endif

In patch 6 you added a stub for of_find_node_by_name(), so do you really
need this #ifdef?

Otherwise it looks good.

Acked-by: Dmitry Torokhov <dmitry.torokhov@...il.com>

Thanks.

-- 
Dmitry
--
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