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Date: Sat, 24 Mar 2018 13:36:46 +0000
From: Jonathan Cameron <jic23@...nel.org>
To: Brian Masney <masneyb@...tation.org>
Cc: linux-iio@...r.kernel.org, gregkh@...uxfoundation.org,
devel@...verdev.osuosl.org, knaack.h@....de, lars@...afoo.de,
pmeerw@...erw.net, linux-kernel@...r.kernel.org,
Jon.Brenner@....com
Subject: Re: [PATCH 05/11] staging: iio: tsl2x7x: split out als and prox
interrupt settings
On Wed, 21 Mar 2018 06:29:06 -0400
Brian Masney <masneyb@...tation.org> wrote:
> The struct tsl2x7x_settings contained an interrupts_en member that was
> a bitmask for which interrupts are enabled. This required having
> bitmasks in several parts of the code. This patch splits this field
> out into two booleans to remove most of the bitmasks in the code.
>
> This patch also fixes a bug where if an interrupt pin was configured,
> but proximity interrupts were disabled, then the proximity value could
> not be polled.
>
> This patch also removes an unnecessary second call to writing the
> control register in tsl2x7x_chip_on().
>
> Driver tested using a TSL2772 hooked up to a Raspberry Pi 2.
>
> Signed-off-by: Brian Masney <masneyb@...tation.org>
Applied.
> ---
> drivers/staging/iio/light/tsl2x7x.c | 64 ++++++++++++-------------------------
> drivers/staging/iio/light/tsl2x7x.h | 7 ++--
> 2 files changed, 24 insertions(+), 47 deletions(-)
>
> diff --git a/drivers/staging/iio/light/tsl2x7x.c b/drivers/staging/iio/light/tsl2x7x.c
> index 99230d9313e1..f7e7fcc17059 100644
> --- a/drivers/staging/iio/light/tsl2x7x.c
> +++ b/drivers/staging/iio/light/tsl2x7x.c
> @@ -226,10 +226,11 @@ static const struct tsl2x7x_settings tsl2x7x_default_settings = {
> .prox_config = 0,
> .als_gain_trim = 1000,
> .als_cal_target = 150,
> + .als_interrupt_en = false,
> .als_thresh_low = 200,
> .als_thresh_high = 256,
> .persistence = 255,
> - .interrupts_en = 0,
> + .prox_interrupt_en = false,
> .prox_thres_low = 0,
> .prox_thres_high = 512,
> .prox_max_samples_cal = 30,
> @@ -686,37 +687,22 @@ static int tsl2x7x_chip_on(struct iio_dev *indio_dev)
> /* Power-on settling time */
> usleep_range(3000, 3500);
>
> - /*
> - * NOW enable the ADC
> - * initialize the desired mode of operation
> - */
> - ret = tsl2x7x_write_control_reg(chip,
> - TSL2X7X_CNTL_PWR_ON |
> - TSL2X7X_CNTL_ADC_ENBL |
> - TSL2X7X_CNTL_PROX_DET_ENBL);
> + reg_val = TSL2X7X_CNTL_PWR_ON | TSL2X7X_CNTL_ADC_ENBL |
> + TSL2X7X_CNTL_PROX_DET_ENBL;
> + if (chip->settings.als_interrupt_en)
> + reg_val |= TSL2X7X_CNTL_ALS_INT_ENBL;
> + if (chip->settings.prox_interrupt_en)
> + reg_val |= TSL2X7X_CNTL_PROX_INT_ENBL;
> +
> + ret = tsl2x7x_write_control_reg(chip, reg_val);
> if (ret < 0)
> return ret;
>
> - chip->tsl2x7x_chip_status = TSL2X7X_CHIP_WORKING;
> -
> - if (chip->settings.interrupts_en != 0) {
> - dev_info(&chip->client->dev, "Setting Up Interrupt(s)\n");
> -
> - reg_val = TSL2X7X_CNTL_PWR_ON | TSL2X7X_CNTL_ADC_ENBL;
> - if (chip->settings.interrupts_en == 0x20 ||
> - chip->settings.interrupts_en == 0x30)
> - reg_val |= TSL2X7X_CNTL_PROX_DET_ENBL;
> -
> - reg_val |= chip->settings.interrupts_en;
> - ret = tsl2x7x_write_control_reg(chip, reg_val);
> - if (ret < 0)
> - return ret;
> + ret = tsl2x7x_clear_interrupts(chip, TSL2X7X_CMD_PROXALS_INT_CLR);
> + if (ret < 0)
> + return ret;
>
> - ret = tsl2x7x_clear_interrupts(chip,
> - TSL2X7X_CMD_PROXALS_INT_CLR);
> - if (ret < 0)
> - return ret;
> - }
> + chip->tsl2x7x_chip_status = TSL2X7X_CHIP_WORKING;
>
> return ret;
> }
> @@ -978,14 +964,11 @@ static int tsl2x7x_read_interrupt_config(struct iio_dev *indio_dev,
> enum iio_event_direction dir)
> {
> struct tsl2X7X_chip *chip = iio_priv(indio_dev);
> - int ret;
>
> if (chan->type == IIO_INTENSITY)
> - ret = !!(chip->settings.interrupts_en & 0x10);
> + return chip->settings.als_interrupt_en;
> else
> - ret = !!(chip->settings.interrupts_en & 0x20);
> -
> - return ret;
> + return chip->settings.prox_interrupt_en;
> }
>
> static int tsl2x7x_write_interrupt_config(struct iio_dev *indio_dev,
> @@ -997,17 +980,10 @@ static int tsl2x7x_write_interrupt_config(struct iio_dev *indio_dev,
> struct tsl2X7X_chip *chip = iio_priv(indio_dev);
> int ret;
>
> - if (chan->type == IIO_INTENSITY) {
> - if (val)
> - chip->settings.interrupts_en |= 0x10;
> - else
> - chip->settings.interrupts_en &= 0x20;
> - } else {
> - if (val)
> - chip->settings.interrupts_en |= 0x20;
> - else
> - chip->settings.interrupts_en &= 0x10;
> - }
> + if (chan->type == IIO_INTENSITY)
> + chip->settings.als_interrupt_en = val ? true : false;
> + else
> + chip->settings.prox_interrupt_en = val ? true : false;
>
> ret = tsl2x7x_invoke_change(indio_dev);
> if (ret < 0)
> diff --git a/drivers/staging/iio/light/tsl2x7x.h b/drivers/staging/iio/light/tsl2x7x.h
> index 28b0e7fdc9b8..b2aa642299b3 100644
> --- a/drivers/staging/iio/light/tsl2x7x.h
> +++ b/drivers/staging/iio/light/tsl2x7x.h
> @@ -50,12 +50,12 @@ struct tsl2x7x_lux {
> * @prox_config: Prox configuration filters.
> * @als_cal_target: Known external ALS reading for
> * calibration.
> - * @interrupts_en: Enable/Disable - 0x00 = none, 0x10 = als,
> - * 0x20 = prx, 0x30 = bth
> * @persistence: H/W Filters, Number of 'out of limits'
> * ADC readings PRX/ALS.
> + * @als_interrupt_en: Enable/Disable ALS interrupts
> * @als_thresh_low: CH0 'low' count to trigger interrupt.
> * @als_thresh_high: CH0 'high' count to trigger interrupt.
> + * @prox_interrupt_en: Enable/Disable proximity interrupts
> * @prox_thres_low: Low threshold proximity detection.
> * @prox_thres_high: High threshold proximity detection
> * @prox_pulse_count: Number if proximity emitter pulses
> @@ -70,10 +70,11 @@ struct tsl2x7x_settings {
> int prox_gain;
> int prox_config;
> int als_cal_target;
> - u8 interrupts_en;
> u8 persistence;
> + bool als_interrupt_en;
> int als_thresh_low;
> int als_thresh_high;
> + bool prox_interrupt_en;
> int prox_thres_low;
> int prox_thres_high;
> int prox_pulse_count;
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