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 <alexandru.ardelean@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Jonathan Cameron

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ecb010d441
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1fd4567026
@@ -41,6 +41,8 @@ struct adis_timeout {
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* @glob_cmd_reg: Register address of the GLOB_CMD register
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* @msc_ctrl_reg: Register address of the MSC_CTRL register
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* @diag_stat_reg: Register address of the DIAG_STAT register
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* @prod_id_reg: Register address of the PROD_ID register
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* @prod_id: Product ID code that should be expected when reading @prod_id_reg
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* @self_test_reg: Register address to request self test command
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* @status_error_msgs: Array of error messgaes
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* @status_error_mask:
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@@ -54,6 +56,9 @@ struct adis_data {
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unsigned int glob_cmd_reg;
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unsigned int msc_ctrl_reg;
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unsigned int diag_stat_reg;
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unsigned int prod_id_reg;
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unsigned int prod_id;
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unsigned int self_test_mask;
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unsigned int self_test_reg;
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