Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753036AbcKZDiC (ORCPT ); Fri, 25 Nov 2016 22:38:02 -0500 Received: from mail-pg0-f66.google.com ([74.125.83.66]:36456 "EHLO mail-pg0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750857AbcKZDiB (ORCPT ); Fri, 25 Nov 2016 22:38:01 -0500 From: Aniroop Mathur To: jic23@kernel.org, knaack.h@gmx.de, lars@metafoo.de, pmeerw@pmeerw.net, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org Cc: s.samuel@samsung.com, r.mahale@samsung.com, aniroop.mathur@gmail.com, Aniroop Mathur Subject: [PATCH] IIO: Change msleep to usleep_range for small msecs Date: Sat, 26 Nov 2016 09:17:26 +0530 Message-Id: <1480132046-5406-1-git-send-email-a.mathur@samsung.com> X-Mailer: git-send-email 2.6.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 8210 Lines: 233 msleep(1~20) may not do what the caller intends, and will often sleep longer. (~20 ms actual sleep for any value given in the 1~20ms range) This is not the desired behaviour for many cases like device resume time, device suspend time, device enable time, data reading time, etc. Thus, change msleep to usleep_range for precise wakeups. Signed-off-by: Aniroop Mathur --- drivers/iio/adc/exynos_adc.c | 2 +- drivers/iio/pressure/bmp280-core.c | 14 +++++++------- drivers/staging/iio/meter/ade7753.c | 2 +- drivers/staging/iio/meter/ade7753.h | 2 +- drivers/staging/iio/meter/ade7754.c | 2 +- drivers/staging/iio/meter/ade7754.h | 2 +- drivers/staging/iio/meter/ade7758.h | 2 +- drivers/staging/iio/meter/ade7758_core.c | 2 +- drivers/staging/iio/meter/ade7759.c | 2 +- drivers/staging/iio/meter/ade7759.h | 2 +- drivers/staging/iio/meter/ade7854.c | 2 +- drivers/staging/iio/meter/ade7854.h | 2 +- 12 files changed, 18 insertions(+), 18 deletions(-) diff --git a/drivers/iio/adc/exynos_adc.c b/drivers/iio/adc/exynos_adc.c index c15756d..ad1775b 100644 --- a/drivers/iio/adc/exynos_adc.c +++ b/drivers/iio/adc/exynos_adc.c @@ -632,7 +632,7 @@ static irqreturn_t exynos_ts_isr(int irq, void *dev_id) input_report_key(info->input, BTN_TOUCH, 1); input_sync(info->input); - msleep(1); + usleep_range(1000, 1100); }; writel(0, ADC_V1_CLRINTPNDNUP(info->regs)); diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c index e5a533c..4d18826 100644 --- a/drivers/iio/pressure/bmp280-core.c +++ b/drivers/iio/pressure/bmp280-core.c @@ -65,7 +65,7 @@ struct bmp280_data { struct bmp180_calib calib; struct regulator *vddd; struct regulator *vdda; - unsigned int start_up_time; /* in milliseconds */ + unsigned int start_up_time; /* in microseconds */ /* log of base 2 of oversampling rate */ u8 oversampling_press; @@ -935,14 +935,14 @@ int bmp280_common_probe(struct device *dev, data->chip_info = &bmp180_chip_info; data->oversampling_press = ilog2(8); data->oversampling_temp = ilog2(1); - data->start_up_time = 10; + data->start_up_time = 10000; break; case BMP280_CHIP_ID: indio_dev->num_channels = 2; data->chip_info = &bmp280_chip_info; data->oversampling_press = ilog2(16); data->oversampling_temp = ilog2(2); - data->start_up_time = 2; + data->start_up_time = 2000; break; case BME280_CHIP_ID: indio_dev->num_channels = 3; @@ -950,7 +950,7 @@ int bmp280_common_probe(struct device *dev, data->oversampling_press = ilog2(16); data->oversampling_humid = ilog2(16); data->oversampling_temp = ilog2(2); - data->start_up_time = 2; + data->start_up_time = 2000; break; default: return -EINVAL; @@ -979,7 +979,7 @@ int bmp280_common_probe(struct device *dev, goto out_disable_vddd; } /* Wait to make sure we started up properly */ - mdelay(data->start_up_time); + usleep_range(data->start_up_time, data->start_up_time + 100); /* Bring chip out of reset if there is an assigned GPIO line */ gpiod = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); @@ -1038,7 +1038,7 @@ 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 *100); + pm_runtime_set_autosuspend_delay(dev, data->start_up_time / 10); pm_runtime_use_autosuspend(dev); pm_runtime_put(dev); @@ -1101,7 +1101,7 @@ static int bmp280_runtime_resume(struct device *dev) ret = regulator_enable(data->vdda); if (ret) return ret; - msleep(data->start_up_time); + usleep_range(data->start_up_time, data->start_up_time + 100); return data->chip_info->chip_config(data); } #endif /* CONFIG_PM */ diff --git a/drivers/staging/iio/meter/ade7753.c b/drivers/staging/iio/meter/ade7753.c index 4b5f05f..671dc99 100644 --- a/drivers/staging/iio/meter/ade7753.c +++ b/drivers/staging/iio/meter/ade7753.c @@ -377,7 +377,7 @@ static int ade7753_initial_setup(struct iio_dev *indio_dev) } ade7753_reset(dev); - msleep(ADE7753_STARTUP_DELAY); + usleep_range(ADE7753_STARTUP_DELAY, ADE7753_STARTUP_DELAY + 100); err_ret: return ret; diff --git a/drivers/staging/iio/meter/ade7753.h b/drivers/staging/iio/meter/ade7753.h index a9d93cc..bfe7491 100644 --- a/drivers/staging/iio/meter/ade7753.h +++ b/drivers/staging/iio/meter/ade7753.h @@ -49,7 +49,7 @@ #define ADE7753_MAX_TX 4 #define ADE7753_MAX_RX 4 -#define ADE7753_STARTUP_DELAY 1 +#define ADE7753_STARTUP_DELAY 1000 #define ADE7753_SPI_SLOW (u32)(300 * 1000) #define ADE7753_SPI_BURST (u32)(1000 * 1000) diff --git a/drivers/staging/iio/meter/ade7754.c b/drivers/staging/iio/meter/ade7754.c index c46bef6..49eb10b 100644 --- a/drivers/staging/iio/meter/ade7754.c +++ b/drivers/staging/iio/meter/ade7754.c @@ -396,7 +396,7 @@ static int ade7754_initial_setup(struct iio_dev *indio_dev) } ade7754_reset(dev); - msleep(ADE7754_STARTUP_DELAY); + usleep_range(ADE7754_STARTUP_DELAY, ADE7754_STARTUP_DELAY + 100); err_ret: return ret; diff --git a/drivers/staging/iio/meter/ade7754.h b/drivers/staging/iio/meter/ade7754.h index e42ffc3..28f71c2 100644 --- a/drivers/staging/iio/meter/ade7754.h +++ b/drivers/staging/iio/meter/ade7754.h @@ -67,7 +67,7 @@ #define ADE7754_MAX_TX 4 #define ADE7754_MAX_RX 4 -#define ADE7754_STARTUP_DELAY 1 +#define ADE7754_STARTUP_DELAY 1000 #define ADE7754_SPI_SLOW (u32)(300 * 1000) #define ADE7754_SPI_BURST (u32)(1000 * 1000) diff --git a/drivers/staging/iio/meter/ade7758.h b/drivers/staging/iio/meter/ade7758.h index 1d04ec9..6ae78d8 100644 --- a/drivers/staging/iio/meter/ade7758.h +++ b/drivers/staging/iio/meter/ade7758.h @@ -89,7 +89,7 @@ #define ADE7758_MAX_TX 8 #define ADE7758_MAX_RX 4 -#define ADE7758_STARTUP_DELAY 1 +#define ADE7758_STARTUP_DELAY 1000 #define AD7758_NUM_WAVSEL 5 #define AD7758_NUM_PHSEL 3 diff --git a/drivers/staging/iio/meter/ade7758_core.c b/drivers/staging/iio/meter/ade7758_core.c index ebb8a19..3767246 100644 --- a/drivers/staging/iio/meter/ade7758_core.c +++ b/drivers/staging/iio/meter/ade7758_core.c @@ -459,7 +459,7 @@ static int ade7758_initial_setup(struct iio_dev *indio_dev) } ade7758_reset(dev); - msleep(ADE7758_STARTUP_DELAY); + usleep_range(ADE7758_STARTUP_DELAY, ADE7758_STARTUP_DELAY + 100); err_ret: return ret; diff --git a/drivers/staging/iio/meter/ade7759.c b/drivers/staging/iio/meter/ade7759.c index 80144d4..944ee34 100644 --- a/drivers/staging/iio/meter/ade7759.c +++ b/drivers/staging/iio/meter/ade7759.c @@ -338,7 +338,7 @@ static int ade7759_initial_setup(struct iio_dev *indio_dev) } ade7759_reset(dev); - msleep(ADE7759_STARTUP_DELAY); + usleep_range(ADE7759_STARTUP_DELAY, ADE7759_STARTUP_DELAY + 100); err_ret: return ret; diff --git a/drivers/staging/iio/meter/ade7759.h b/drivers/staging/iio/meter/ade7759.h index f9ff1f8..f0716d2 100644 --- a/drivers/staging/iio/meter/ade7759.h +++ b/drivers/staging/iio/meter/ade7759.h @@ -30,7 +30,7 @@ #define ADE7759_MAX_TX 6 #define ADE7759_MAX_RX 6 -#define ADE7759_STARTUP_DELAY 1 +#define ADE7759_STARTUP_DELAY 1000 #define ADE7759_SPI_SLOW (u32)(300 * 1000) #define ADE7759_SPI_BURST (u32)(1000 * 1000) diff --git a/drivers/staging/iio/meter/ade7854.c b/drivers/staging/iio/meter/ade7854.c index 75e8685..58a05ec 100644 --- a/drivers/staging/iio/meter/ade7854.c +++ b/drivers/staging/iio/meter/ade7854.c @@ -444,7 +444,7 @@ static int ade7854_initial_setup(struct iio_dev *indio_dev) } ade7854_reset(dev); - msleep(ADE7854_STARTUP_DELAY); + usleep_range(ADE7854_STARTUP_DELAY, ADE7854_STARTUP_DELAY + 100); err_ret: return ret; diff --git a/drivers/staging/iio/meter/ade7854.h b/drivers/staging/iio/meter/ade7854.h index 52f4195..dbd97de 100644 --- a/drivers/staging/iio/meter/ade7854.h +++ b/drivers/staging/iio/meter/ade7854.h @@ -136,7 +136,7 @@ #define ADE7854_MAX_TX 7 #define ADE7854_MAX_RX 7 -#define ADE7854_STARTUP_DELAY 1 +#define ADE7854_STARTUP_DELAY 1000 #define ADE7854_SPI_SLOW (u32)(300 * 1000) #define ADE7854_SPI_BURST (u32)(1000 * 1000) -- 2.6.2