From 6282b5c620183f4787f788da2e642c7c61f9b557 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Tue, 12 Mar 2019 09:40:18 +0100 Subject: iio: pressure: bmp280: BMP280 calibration to entropy The BMP280/BME280 calibration data should also go into the entropy pool, like we do for BMP180. This just adds the temperature and pressure calibration, the humidity calibration seems like too much annoying calls to add. Cc: Tomasz Duszynski Cc: Stefan Tatschner Cc: Andreas Klinger Signed-off-by: Linus Walleij Signed-off-by: Jonathan Cameron --- drivers/iio/pressure/bmp280-core.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'drivers/iio/pressure/bmp280-core.c') diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c index fe87d27779d9..3329d740c86c 100644 --- a/drivers/iio/pressure/bmp280-core.c +++ b/drivers/iio/pressure/bmp280-core.c @@ -164,6 +164,9 @@ static int bmp280_read_calib(struct bmp280_data *data, return ret; } + /* Toss the temperature calibration data into the entropy pool */ + add_device_randomness(t_buf, sizeof(t_buf)); + calib->T1 = le16_to_cpu(t_buf[T1]); calib->T2 = le16_to_cpu(t_buf[T2]); calib->T3 = le16_to_cpu(t_buf[T3]); @@ -177,6 +180,9 @@ static int bmp280_read_calib(struct bmp280_data *data, return ret; } + /* Toss the pressure calibration data into the entropy pool */ + add_device_randomness(p_buf, sizeof(p_buf)); + calib->P1 = le16_to_cpu(p_buf[P1]); calib->P2 = le16_to_cpu(p_buf[P2]); calib->P3 = le16_to_cpu(p_buf[P3]); -- cgit v1.2.3