diff options
Diffstat (limited to 'drivers/iio/imu/adis.c')
| -rw-r--r-- | drivers/iio/imu/adis.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/drivers/iio/imu/adis.c b/drivers/iio/imu/adis.c index 0bd6e32cf577..a8afd01de4f3 100644 --- a/drivers/iio/imu/adis.c +++ b/drivers/iio/imu/adis.c @@ -373,6 +373,10 @@ static int adis_self_test(struct adis *adis) * via GPIOLIB. If no pin is configured a SW reset will be performed. * The RST pin for the ADIS devices should be configured as ACTIVE_LOW. * + * After the self-test operation is performed, the function will also check + * that the product ID is as expected. This assumes that drivers providing + * 'prod_id_reg' will also provide the 'prod_id'. + * * Returns 0 if the device is operational, a negative error code otherwise. * * This function should be called early on in the device initialization sequence @@ -382,6 +386,7 @@ int __adis_initial_startup(struct adis *adis) { const struct adis_timeout *timeouts = adis->data->timeouts; struct gpio_desc *gpio; + uint16_t prod_id; int ret; /* check if the device has rst pin low */ @@ -401,7 +406,23 @@ int __adis_initial_startup(struct adis *adis) return ret; } - return adis_self_test(adis); + ret = adis_self_test(adis); + if (ret) + return ret; + + if (!adis->data->prod_id_reg) + return 0; + + ret = adis_read_reg_16(adis, adis->data->prod_id_reg, &prod_id); + if (ret) + return ret; + + if (prod_id != adis->data->prod_id) + dev_warn(&adis->spi->dev, + "Device ID(%u) and product ID(%u) do not match.", + adis->data->prod_id, prod_id); + + return 0; } EXPORT_SYMBOL_GPL(__adis_initial_startup); |