i3c: mipi-i3c-hci: Support configurable device NACK retries

Implement the .set_dev_nack_retry() master operation using the
DAT_0_DEV_NACK_RETRY_CNT field in Device Address Table entries.

Since the retry count is programmed per DAT entry, update all allocated
entries when the setting changes. Also initialize newly allocated
entries with the current retry count so that a consistent retry policy
is applied across all devices.

Add a DAT helper to update the retry count of an individual entry.
Return -ERANGE if the requested retry count exceeds the hardware field
width and -EOPNOTSUPP when the active command descriptor model does not
use DAT entries.

In addition, default the retry count to 1. The I3C specification
mandates a retry when a Target NACKs its Dynamic Address. HCI v1.1
explicitly preserves that behaviour for Direct CCCs even when
DEV_NACK_RETRY_CNT is programmed to 0, but HCI v1.0 defines the field
only as a device-specific retry count and does not provide the same
exception. As a result, a v1.0 controller left at the reset value of 0
may perform no retry whereas a v1.1 controller will retry once.
Promoting 0 to 1 at probe time makes the behaviour consistent across
controller versions. Userspace can still select 0 retries explicitly
via dev_nack_retry_count.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260920151248.46936-16-adrian.hunter@intel.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

0 files changed, 0 insertions, 0 deletions