linux-kernel - Re: [PATCH v3 3/3] pwm: New driver to support PWM driven LEDs on TWL4030/6030 series of PMICs

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Message-ID: <20121123150412.GB16810@avionic-0098.adnet.avionic-design.de>
Date:	Fri, 23 Nov 2012 16:04:12 +0100
From:	Thierry Reding <thierry.reding@...onic-design.de>
To:	Peter Ujfalusi <peter.ujfalusi@...com>
Cc:	Tero Kristo <t-kristo@...com>,
	Grazvydas Ignotas <notasas@...il.com>,
	linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
	Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH v3 3/3] pwm: New driver to support PWM driven LEDs on
 TWL4030/6030 series of PMICs

On Tue, Nov 20, 2012 at 10:56:22AM +0100, Peter Ujfalusi wrote:
> The driver supports the following LED outputs as generic PWM driver:
> TWL4030 LEDA and LEDB (PWMA and PWMB)
> TWL6030 Charging indicator LED (PWM LED)
> 
> On TWL6030 when the PWM requested LED is configured to be controlled by SW.
> In this case the user can enable/disable and set the duty period freely.
> When the PWM has been freed, the LED driver is put back to HW control.
> 
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...com>
> ---
>  drivers/pwm/Kconfig       |  10 ++
>  drivers/pwm/Makefile      |   1 +
>  drivers/pwm/pwm-twl-led.c | 303 ++++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 314 insertions(+)
>  create mode 100644 drivers/pwm/pwm-twl-led.c

Doesn't this belong in the drivers/leds subsystem? Besides that, the
same comments as for the previous patch apply. One additional note
below.

> +static struct platform_driver twl_pwmled_driver = {
> +	.driver = {
> +		.name = "twl-pwmled",
> +		.of_match_table = of_match_ptr(twl_pwmled_of_match),
> +	},
> +	.probe = twl_pwmled_probe,
> +	.remove = __devexit_p(twl_pwmled_remove),

You didn't annotate twl_pwmled_remove() with __devexit, so __devexit_p
isn't needed here either.

Thierry

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