From 1fd4567026926d01a94a74d0543e324fc794aa73 Mon Sep 17 00:00:00 2001 From: Alexandru Ardelean Date: Mon, 10 Feb 2020 15:26:04 +0200 Subject: iio: imu: adis: add support product ID check in adis_initial_startup Each driver/chip that wants to validate it's product id, can now specify a 'prod_id_reg' and an expected 'prod_id' value. The 'prod_id' value is intentionally left 0 (uninitialized). There aren't (yet) any product IDs with value 0; this enforces that both 'prod_id_reg' and 'prod_id' are specified. At the very least, this routine validates that the SPI connection to the ADIS chip[s] works well. Signed-off-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron --- include/linux/iio/imu/adis.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include') diff --git a/include/linux/iio/imu/adis.h b/include/linux/iio/imu/adis.h index b7feca4e5f26..ac7cfd073804 100644 --- a/include/linux/iio/imu/adis.h +++ b/include/linux/iio/imu/adis.h @@ -41,6 +41,8 @@ struct adis_timeout { * @glob_cmd_reg: Register address of the GLOB_CMD register * @msc_ctrl_reg: Register address of the MSC_CTRL register * @diag_stat_reg: Register address of the DIAG_STAT register + * @prod_id_reg: Register address of the PROD_ID register + * @prod_id: Product ID code that should be expected when reading @prod_id_reg * @self_test_reg: Register address to request self test command * @status_error_msgs: Array of error messgaes * @status_error_mask: @@ -54,6 +56,9 @@ struct adis_data { unsigned int glob_cmd_reg; unsigned int msc_ctrl_reg; unsigned int diag_stat_reg; + unsigned int prod_id_reg; + + unsigned int prod_id; unsigned int self_test_mask; unsigned int self_test_reg; -- cgit v1.3.1