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Message-ID: <20241208180817.6ae939db@jic23-huawei>
Date: Sun, 8 Dec 2024 18:08:17 +0000
From: Jonathan Cameron <jic23@...nel.org>
To: Vasileios Amoiridis <vassilisamir@...il.com>
Cc: lars@...afoo.de, robh@...nel.org, krzk+dt@...nel.org,
conor+dt@...nel.org, andriy.shevchenko@...ux.intel.com, ajarizzo@...il.com,
ak@...klinger.de, linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 3/3] iio: pressure: bmp280: Make time vars intuitive
and move to fsleep
On Mon, 2 Dec 2024 19:19:07 +0100
Vasileios Amoiridis <vassilisamir@...il.com> wrote:
> Move sleep functions to the new fsleep() implementation. While at it,
> add time unit abbreviation as a suffix of time describing variables to
> make them more intuitive.
>
> Signed-off-by: Vasileios Amoiridis <vassilisamir@...il.com>
Applied this one. So only patch 1 needs an update.
Thanks,
Jonathan
> ---
> drivers/iio/pressure/bmp280-core.c | 39 +++++++++++++++---------------
> drivers/iio/pressure/bmp280.h | 4 +--
> 2 files changed, 22 insertions(+), 21 deletions(-)
>
> diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c
> index e5ec8137961f..b39ef30f8eda 100644
> --- a/drivers/iio/pressure/bmp280-core.c
> +++ b/drivers/iio/pressure/bmp280-core.c
> @@ -1002,7 +1002,7 @@ static int bmp280_preinit(struct bmp280_data *data)
> * after resetting, the device uses the complete power-on sequence so
> * it needs to wait for the defined start-up time.
> */
> - fsleep(data->start_up_time);
> + fsleep(data->start_up_time_us);
>
> ret = regmap_read(data->regmap, BMP280_REG_STATUS, ®);
> if (ret)
> @@ -1161,7 +1161,7 @@ const struct bmp280_chip_info bmp280_chip_info = {
> .chip_id = bmp280_chip_ids,
> .num_chip_id = ARRAY_SIZE(bmp280_chip_ids),
> .regmap_config = &bmp280_regmap_config,
> - .start_up_time = 2000,
> + .start_up_time_us = 2000,
> .channels = bmp280_channels,
> .num_channels = ARRAY_SIZE(bmp280_channels),
> .avail_scan_masks = bmp280_avail_scan_masks,
> @@ -1347,7 +1347,7 @@ const struct bmp280_chip_info bme280_chip_info = {
> .chip_id = bme280_chip_ids,
> .num_chip_id = ARRAY_SIZE(bme280_chip_ids),
> .regmap_config = &bme280_regmap_config,
> - .start_up_time = 2000,
> + .start_up_time_us = 2000,
> .channels = bme280_channels,
> .num_channels = ARRAY_SIZE(bme280_channels),
> .avail_scan_masks = bme280_avail_scan_masks,
> @@ -1414,7 +1414,7 @@ static int bmp380_cmd(struct bmp280_data *data, u8 cmd)
> return ret;
> }
> /* Wait for 2ms for command to be processed */
> - usleep_range(data->start_up_time, data->start_up_time + 100);
> + fsleep(data->start_up_time_us);
> /* Check for command processing error */
> ret = regmap_read(data->regmap, BMP380_REG_ERROR, ®);
> if (ret) {
> @@ -1806,7 +1806,7 @@ static int bmp380_chip_config(struct bmp280_data *data)
> * formula in datasheet section 3.9.2 with an offset of ~+15%
> * as it seen as well in table 3.9.1.
> */
> - msleep(150);
> + fsleep(150 * USEC_PER_MSEC);
>
> /* Check config error flag */
> ret = regmap_read(data->regmap, BMP380_REG_ERROR, &tmp);
> @@ -1957,7 +1957,7 @@ const struct bmp280_chip_info bmp380_chip_info = {
> .num_chip_id = ARRAY_SIZE(bmp380_chip_ids),
> .regmap_config = &bmp380_regmap_config,
> .spi_read_extra_byte = true,
> - .start_up_time = 2000,
> + .start_up_time_us = 2000,
> .channels = bmp380_channels,
> .num_channels = ARRAY_SIZE(bmp380_channels),
> .avail_scan_masks = bmp280_avail_scan_masks,
> @@ -2006,7 +2006,8 @@ static int bmp580_soft_reset(struct bmp280_data *data)
> dev_err(data->dev, "failed to send reset command to device\n");
> return ret;
> }
> - usleep_range(2000, 2500);
> + /* From datasheet's table 4: electrical characteristics */
> + fsleep(2000);
>
> /* Dummy read of chip_id */
> ret = regmap_read(data->regmap, BMP580_REG_CHIP_ID, ®);
> @@ -2208,7 +2209,7 @@ static int bmp580_nvmem_read_impl(void *priv, unsigned int offset, void *val,
> goto exit;
> }
> /* Wait standby transition time */
> - usleep_range(2500, 3000);
> + fsleep(2500);
>
> while (bytes >= sizeof(*dst)) {
> addr = bmp580_nvmem_addrs[offset / sizeof(*dst)];
> @@ -2274,7 +2275,7 @@ static int bmp580_nvmem_write_impl(void *priv, unsigned int offset, void *val,
> goto exit;
> }
> /* Wait standby transition time */
> - usleep_range(2500, 3000);
> + fsleep(2500);
>
> while (bytes >= sizeof(*buf)) {
> addr = bmp580_nvmem_addrs[offset / sizeof(*buf)];
> @@ -2458,7 +2459,7 @@ static int bmp580_chip_config(struct bmp280_data *data)
> return ret;
> }
> /* From datasheet's table 4: electrical characteristics */
> - usleep_range(2500, 3000);
> + fsleep(2500);
>
> /* Set default DSP mode settings */
> reg_val = FIELD_PREP(BMP580_DSP_COMP_MASK, BMP580_DSP_PRESS_TEMP_COMP_EN) |
> @@ -2649,7 +2650,7 @@ const struct bmp280_chip_info bmp580_chip_info = {
> .chip_id = bmp580_chip_ids,
> .num_chip_id = ARRAY_SIZE(bmp580_chip_ids),
> .regmap_config = &bmp580_regmap_config,
> - .start_up_time = 2000,
> + .start_up_time_us = 2000,
> .channels = bmp580_channels,
> .num_channels = ARRAY_SIZE(bmp580_channels),
> .avail_scan_masks = bmp280_avail_scan_masks,
> @@ -2720,7 +2721,7 @@ static int bmp180_wait_for_eoc(struct bmp280_data *data, u8 ctrl_meas)
> delay_us =
> conversion_time_max[data->oversampling_press];
>
> - usleep_range(delay_us, delay_us + 1000);
> + fsleep(delay_us);
> }
>
> ret = regmap_read(data->regmap, BMP280_REG_CTRL_MEAS, &ctrl);
> @@ -2988,7 +2989,7 @@ const struct bmp280_chip_info bmp180_chip_info = {
> .chip_id = bmp180_chip_ids,
> .num_chip_id = ARRAY_SIZE(bmp180_chip_ids),
> .regmap_config = &bmp180_regmap_config,
> - .start_up_time = 2000,
> + .start_up_time_us = 2000,
> .channels = bmp280_channels,
> .num_channels = ARRAY_SIZE(bmp280_channels),
> .avail_scan_masks = bmp280_avail_scan_masks,
> @@ -3066,7 +3067,7 @@ const struct bmp280_chip_info bmp085_chip_info = {
> .chip_id = bmp180_chip_ids,
> .num_chip_id = ARRAY_SIZE(bmp180_chip_ids),
> .regmap_config = &bmp180_regmap_config,
> - .start_up_time = 2000,
> + .start_up_time_us = 2000,
> .channels = bmp280_channels,
> .num_channels = ARRAY_SIZE(bmp280_channels),
> .avail_scan_masks = bmp280_avail_scan_masks,
> @@ -3175,7 +3176,7 @@ int bmp280_common_probe(struct device *dev,
> data->oversampling_temp = chip_info->oversampling_temp_default;
> data->iir_filter_coeff = chip_info->iir_filter_coeff_default;
> data->sampling_freq = chip_info->sampling_freq_default;
> - data->start_up_time = chip_info->start_up_time;
> + data->start_up_time_us = chip_info->start_up_time_us;
>
> /* Bring up regulators */
> regulator_bulk_set_supply_names(data->supplies,
> @@ -3201,7 +3202,7 @@ int bmp280_common_probe(struct device *dev,
> return ret;
>
> /* Wait to make sure we started up properly */
> - usleep_range(data->start_up_time, data->start_up_time + 100);
> + fsleep(data->start_up_time_us);
>
> /* Bring chip out of reset if there is an assigned GPIO line */
> gpiod = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
> @@ -3287,7 +3288,7 @@ int bmp280_common_probe(struct device *dev,
> * Set autosuspend to two orders of magnitude larger than the
> * start-up time.
> */
> - pm_runtime_set_autosuspend_delay(dev, data->start_up_time / 10);
> + pm_runtime_set_autosuspend_delay(dev, data->start_up_time_us / 10);
> pm_runtime_use_autosuspend(dev);
> pm_runtime_put(dev);
>
> @@ -3306,7 +3307,7 @@ static int bmp280_runtime_suspend(struct device *dev)
>
> data->chip_info->set_mode(data, BMP280_SLEEP);
>
> - fsleep(data->start_up_time);
> + fsleep(data->start_up_time_us);
> return regulator_bulk_disable(BMP280_NUM_SUPPLIES, data->supplies);
> }
>
> @@ -3320,7 +3321,7 @@ static int bmp280_runtime_resume(struct device *dev)
> if (ret)
> return ret;
>
> - usleep_range(data->start_up_time, data->start_up_time + 100);
> + fsleep(data->start_up_time_us);
>
> ret = data->chip_info->chip_config(data);
> if (ret)
> diff --git a/drivers/iio/pressure/bmp280.h b/drivers/iio/pressure/bmp280.h
> index a3631bc0e188..5b2ee1d0ee46 100644
> --- a/drivers/iio/pressure/bmp280.h
> +++ b/drivers/iio/pressure/bmp280.h
> @@ -434,7 +434,7 @@ struct bmp280_data {
> struct bmp380_calib bmp380;
> } calib;
> struct regulator_bulk_data supplies[BMP280_NUM_SUPPLIES];
> - unsigned int start_up_time; /* in microseconds */
> + unsigned int start_up_time_us;
>
> /* log of base 2 of oversampling rate */
> u8 oversampling_press;
> @@ -490,7 +490,7 @@ struct bmp280_chip_info {
>
> const struct iio_chan_spec *channels;
> int num_channels;
> - unsigned int start_up_time;
> + unsigned int start_up_time_us;
> const unsigned long *avail_scan_masks;
>
> const int *oversampling_temp_avail;
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