linux-kernel - Re: [PATCH 07/12] hwmon: lis3: New parameters to platform data

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Date:	Fri, 22 Oct 2010 17:17:19 +0100
From:	Jonathan Cameron <jic23@....ac.uk>
To:	Samu Onkalo <samu.p.onkalo@...ia.com>
CC:	eric.piel@...mplin-utc.net, khali@...ux-fr.org,
	guenter.roeck@...csson.com, lm-sensors@...sensors.org,
	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 07/12] hwmon: lis3: New parameters to platform data

On 10/22/10 12:57, Samu Onkalo wrote:
> Added default output data rate setting to platform data.
> If default rate is 0, reset default value is used.
> Added control for duration via platform data.
> Added possibility to configure interrupts to trig on
> both rising and falling edge. The lis3 WU unit can be
> configured quite many ways and with some configurations it
> is quite handy to get coordinate refresh when some
> event trigs and when it reason goes away.

Per patch description of what changed would have made reviewing
easier (for lazy people like me ;)
> 
> Signed-off-by: Samu Onkalo <samu.p.onkalo@...ia.com>
Acked-by: Jonathan Cameron <jic23@....ac.uk>
> ---
>  drivers/hwmon/lis3lv02d.c |   21 ++++++++++++++-------
>  include/linux/lis3lv02d.h |    6 +++++-
>  2 files changed, 19 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/hwmon/lis3lv02d.c b/drivers/hwmon/lis3lv02d.c
> index b44d4c5..d66cbe1 100644
> --- a/drivers/hwmon/lis3lv02d.c
> +++ b/drivers/hwmon/lis3lv02d.c
> @@ -706,16 +706,16 @@ static void lis3lv02d_8b_configure(struct lis3lv02d *dev,
>  	if (p->wakeup_flags) {
>  		dev->write(dev, FF_WU_CFG_1, p->wakeup_flags);
>  		dev->write(dev, FF_WU_THS_1, p->wakeup_thresh & 0x7f);
> -		/* default to 2.5ms for now */
> -		dev->write(dev, FF_WU_DURATION_1, 1);
> +		/* pdata value + 1 to keep this backward compatible*/
> +		dev->write(dev, FF_WU_DURATION_1, p->duration1 + 1);
>  		ctrl2 ^= HP_FF_WU1; /* Xor to keep compatible with old pdata*/
>  	}
>  
>  	if (p->wakeup_flags2) {
>  		dev->write(dev, FF_WU_CFG_2, p->wakeup_flags2);
>  		dev->write(dev, FF_WU_THS_2, p->wakeup_thresh2 & 0x7f);
> -		/* default to 2.5ms for now */
> -		dev->write(dev, FF_WU_DURATION_2, 1);
> +		/* pdata value + 1 to keep this backward compatible*/
> +		dev->write(dev, FF_WU_DURATION_2, p->duration2 + 1);
>  		ctrl2 ^= HP_FF_WU2; /* Xor to keep compatible with old pdata*/
>  	}
>  	/* Configure hipass filters */
> @@ -725,8 +725,8 @@ static void lis3lv02d_8b_configure(struct lis3lv02d *dev,
>  		err = request_threaded_irq(p->irq2,
>  					NULL,
>  					lis302dl_interrupt_thread2_8b,
> -					IRQF_TRIGGER_RISING |
> -					IRQF_ONESHOT,
> +					IRQF_TRIGGER_RISING | IRQF_ONESHOT |
> +					(p->irq_flags2 & IRQF_TRIGGER_MASK),
>  					DRIVER_NAME, &lis3_dev);
>  		if (err < 0)
>  			printk(KERN_ERR DRIVER_NAME
> @@ -742,6 +742,7 @@ int lis3lv02d_init_device(struct lis3lv02d *dev)
>  {
>  	int err;
>  	irq_handler_t thread_fn;
> +	int irq_flags = 0;
>  
>  	dev->whoami = lis3lv02d_read_8(dev, WHO_AM_I);
>  
> @@ -804,9 +805,14 @@ int lis3lv02d_init_device(struct lis3lv02d *dev)
>  		if (dev->whoami == WAI_8B)
>  			lis3lv02d_8b_configure(dev, p);
>  
> +		irq_flags = p->irq_flags1 & IRQF_TRIGGER_MASK;
> +
>  		dev->irq_cfg = p->irq_cfg;
>  		if (p->irq_cfg)
>  			dev->write(dev, CTRL_REG3, p->irq_cfg);
> +
> +		if (p->default_rate)
> +			lis3lv02d_set_odr(p->default_rate);
>  	}
>  
>  	/* bail if we did not get an IRQ from the bus layer */
> @@ -834,7 +840,8 @@ int lis3lv02d_init_device(struct lis3lv02d *dev)
>  
>  	err = request_threaded_irq(dev->irq, lis302dl_interrupt,
>  				thread_fn,
> -				IRQF_TRIGGER_RISING | IRQF_ONESHOT,
> +				IRQF_TRIGGER_RISING | IRQF_ONESHOT |
> +				irq_flags,
>  				DRIVER_NAME, &lis3_dev);
>  
>  	if (err < 0) {
> diff --git a/include/linux/lis3lv02d.h b/include/linux/lis3lv02d.h
> index c4a4a52..18d578f 100644
> --- a/include/linux/lis3lv02d.h
> +++ b/include/linux/lis3lv02d.h
> @@ -36,7 +36,10 @@ struct lis3lv02d_platform_data {
>  #define LIS3_IRQ_OPEN_DRAIN	(1 << 6)
>  #define LIS3_IRQ_ACTIVE_LOW	(1 << 7)
>  	unsigned char irq_cfg;
> -
> +	unsigned char irq_flags1; /* Additional irq edge / level flags */
> +	unsigned char irq_flags2; /* Additional irq edge / level flags */
> +	unsigned char duration1;
> +	unsigned char duration2;
>  #define LIS3_WAKEUP_X_LO	(1 << 0)
>  #define LIS3_WAKEUP_X_HI	(1 << 1)
>  #define LIS3_WAKEUP_Y_LO	(1 << 2)
> @@ -66,6 +69,7 @@ struct lis3lv02d_platform_data {
>  	s8 axis_z;
>  #define LIS3_USE_REGULATOR_CTRL 0x01
>  	u16 driver_features;
> +	int default_rate;
>  	int (*setup_resources)(void);
>  	int (*release_resources)(void);
>  	/* Limits for selftest are specified in chip data sheet */

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