linux-kernel - Re: [PATCH v3] pwm: vt8500: Update vt8500 PWM driver support

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Date:	Wed, 24 Oct 2012 07:41:14 +0200
From:	Thierry Reding <thierry.reding@...onic-design.de>
To:	Tony Prisk <linux@...sktech.co.nz>
Cc:	arm@...nel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3] pwm: vt8500: Update vt8500 PWM driver support

On Wed, Oct 24, 2012 at 04:46:58PM +1300, Tony Prisk wrote:
> This patch updates pwm-vt8500.c to support devicetree probing and
> make use of the common clock subsystem.
> 
> A binding document describing the PWM controller found on
> arch-vt8500 is also included.
> 
> Signed-off-by: Tony Prisk <linux@...sktech.co.nz>
> ---
> v2/v3:
> Fix errors/coding style as pointed out by Thierry Reding.
> 
>  .../devicetree/bindings/pwm/vt8500-pwm.txt         |   17 ++++
>  drivers/pwm/pwm-vt8500.c                           |   86 ++++++++++++++------
>  2 files changed, 80 insertions(+), 23 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/pwm/vt8500-pwm.txt

Looking real good now. One last comment though and I think I'm ready to
take this...

> +	err = clk_enable(vt8500->clk);
> +	if (err < 0)
> +		dev_err(chip->dev, "failed to enable clock\n");
> +		return -EBUSY;
> +	};

Why do you return EBUSY instead of err?

Thierry

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