If the doorbell failed to ring we return -EIO, but the caller can't
determine why it failed. Pass the reason for the failure in an
argument for caller to investigate.
Suggested-by: Mark Hasemeyer <markhas@chromium.org>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Mark Hasemeyer <markhas@chromium.org>
Tested-by: Mark Hasemeyer <markhas@chromium.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
}
EXPORT_SYMBOL_GPL(psp_send_platform_access_msg);
-int psp_ring_platform_doorbell(int msg)
+int psp_ring_platform_doorbell(int msg, u32 *result)
{
struct psp_device *psp = psp_get_master_device();
struct psp_platform_access_device *pa_dev;
val = FIELD_GET(PSP_CMDRESP_STS, ioread32(cmd));
if (val) {
+ if (result)
+ *result = val;
ret = -EIO;
goto unlock;
}
* -%EBUSY: mailbox in recovery or in use
* -%ENODEV: driver not bound with PSP device
* -%ETIMEDOUT: request timed out
- * -%EIO: unknown error (see kernel log)
+ * -%EIO: error will be stored in result argument
*/
-int psp_ring_platform_doorbell(int msg);
+int psp_ring_platform_doorbell(int msg, u32 *result);
/**
* psp_check_platform_access_status() - Checks whether platform features is ready