linux-kernel - Re: [PATCH v4 02/24] pwm: use pwm_get

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Message-ID: <CAGhQ9VwEuwazF5Kdw=9R60EovVoiwen6fXiVjL+=EddXPYVGAg@mail.gmail.com>
Date:	Mon, 16 Nov 2015 18:46:44 +0100
From:	Joachim Eastwood <manabian@...il.com>
To:	Boris Brezillon <boris.brezillon@...e-electrons.com>
Cc:	Thierry Reding <thierry.reding@...il.com>,
	linux-pwm@...r.kernel.org,
	Mike Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...eaurora.org>, linux-clk@...r.kernel.org,
	Mark Brown <broonie@...nel.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Kamil Debski <k.debski@...sung.com>, lm-sensors@...sensors.org,
	Jean Delvare <jdelvare@...e.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	linux-input@...r.kernel.org, Bryan Wu <cooloney@...il.com>,
	Richard Purdie <rpurdie@...ys.net>,
	Jacek Anaszewski <j.anaszewski@...sung.com>,
	linux-leds@...r.kernel.org,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Chen-Yu Tsai <wens@...e.org>, linux-sunxi@...glegroups.com,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Heiko Stuebner <heiko@...ech.de>,
	linux-rockchip@...ts.infradead.org,
	Jingoo Han <jingoohan1@...il.com>,
	Lee Jones <lee.jones@...aro.org>, linux-fbdev@...r.kernel.org,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	Robert Jarzmik <robert.jarzmik@...e.fr>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Julia Lawall <Julia.Lawall@...6.fr>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Ariel D'Alessandro" <ariel@...guardiasur.com.ar>
Subject: Re: [PATCH v4 02/24] pwm: use pwm_get_xxx() helpers where appropriate

Hi Boris

(Adding Ariel for pwm-lpc18xx-sct)

On 16 November 2015 at 09:56, Boris Brezillon
<boris.brezillon@...e-electrons.com> wrote:
> Use pwm_get_xxx() helpers instead of directly accessing the pwm->xxx field.
> Doing that will ease adaptation of the PWM framework to support atomic
> update.
>
> Signed-off-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
> ---
> Patch generated with the following coccinelle script:
>
> --->8---
> virtual patch
>
> @@
> struct pwm_device *p;
> expression e;
> @@
> (
> -(p)->polarity = e;
> +pwm_set_polarity((p), e);
> |
> -(p)->polarity
> +pwm_get_polarity((p))
> |
> -(p)->period = e;
> +pwm_set_period((p), e);
> |
> -(p)->period
> +pwm_get_period((p))
> |
> -(p)->duty_cycle = e;
> +pwm_set_duty_cycle((p), e);
> |
> -(p)->duty_cycle
> +pwm_get_duty_cycle((p))
> )
> --->8---
> ---
>  drivers/pwm/pwm-crc.c         | 2 +-
>  drivers/pwm/pwm-lpc18xx-sct.c | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/pwm/pwm-crc.c b/drivers/pwm/pwm-crc.c
> index 7101c70..2f88543 100644
> --- a/drivers/pwm/pwm-crc.c
> +++ b/drivers/pwm/pwm-crc.c
> @@ -75,7 +75,7 @@ static int crc_pwm_config(struct pwm_chip *c, struct pwm_device *pwm,
>                 return -EINVAL;
>         }
>
> -       if (pwm->period != period_ns) {
> +       if (pwm_get_period((pwm)) != period_ns) {
>                 int clk_div;
>
>                 /* changing the clk divisor, need to disable fisrt */
> diff --git a/drivers/pwm/pwm-lpc18xx-sct.c b/drivers/pwm/pwm-lpc18xx-sct.c
> index 9163085..091fa13 100644
> --- a/drivers/pwm/pwm-lpc18xx-sct.c
> +++ b/drivers/pwm/pwm-lpc18xx-sct.c
> @@ -249,7 +249,7 @@ static int lpc18xx_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
>                            LPC18XX_PWM_EVSTATEMSK(lpc18xx_data->duty_event),
>                            LPC18XX_PWM_EVSTATEMSK_ALL);
>
> -       if (pwm->polarity == PWM_POLARITY_NORMAL) {
> +       if (pwm_get_polarity((pwm)) == PWM_POLARITY_NORMAL) {

What is the deal with the double parentheses?

Think I saw that in some of the other patches as well.


regards,
Joachim Eastwood
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