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| author | Michał Mirosław <mirq-linux@rere.qmqm.pl> | 2017-08-17 15:56:11 +0200 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2017-08-20 16:17:27 +0200 |
| commit | 408cc6eb1e3adc43a434d5d584708c2a1d2c6c32 (patch) | |
| tree | 35482b785e4330670f6c9e34ce3f92a63bc8c98e /drivers/iio/magnetometer | |
| parent | iio: magnetometer: ak8974: support AMI306 variant (diff) | |
| download | linux-408cc6eb1e3adc43a434d5d584708c2a1d2c6c32.tar.xz linux-408cc6eb1e3adc43a434d5d584708c2a1d2c6c32.zip | |
iio: magnetometer: ak8974: add_device_randomness (serial number)
Mix device-specific data into randomness pool.
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/magnetometer')
| -rw-r--r-- | drivers/iio/magnetometer/ak8974.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/iio/magnetometer/ak8974.c b/drivers/iio/magnetometer/ak8974.c index 76091da20a0c..b1c209faf1b1 100644 --- a/drivers/iio/magnetometer/ak8974.c +++ b/drivers/iio/magnetometer/ak8974.c @@ -20,6 +20,7 @@ #include <linux/mutex.h> #include <linux/delay.h> #include <linux/bitops.h> +#include <linux/random.h> #include <linux/regmap.h> #include <linux/regulator/consumer.h> #include <linux/pm_runtime.h> @@ -470,6 +471,7 @@ static int ak8974_detect(struct ak8974 *ak8974) ret = ak8974_get_u16_val(ak8974, AMI305_SN, &sn); if (ret) return ret; + add_device_randomness(&sn, sizeof(sn)); dev_info(&ak8974->i2c->dev, "detected %s, FW ver %02x, S/N: %04x\n", name, fw, sn); |