Thread (6 messages) 6 messages, 4 authors, 2025-09-08
STALE302d
Revisions (8)
  1. v1 [diff vs current]
  2. v2 [diff vs current]
  3. v3 [diff vs current]
  4. v4 current
  5. v5 [diff vs current]
  6. v6 [diff vs current]
  7. v7 [diff vs current]
  8. v8 [diff vs current]

[PATCH V4 0/2] Add AMD I3C master controller driver and bindings

From: Manikanta Guntupalli <hidden>
Date: 2025-09-05 11:37:54
Also in: linux-hardening, linux-i3c, lkml

This patch series introduces support for the AMD I3C master controller,
including the device tree binding and driver implementation.

Changes for V2:
Updated commit subject and description.
Moved allOf to after required.
Removed xlnx,num-targets property.
Added mixed mode support with clock configuration.
Converted smaller functions into inline functions.
Used FIELD_GET() in xi3c_get_response().
Updated xi3c_master_rd_from_rx_fifo() to use cmd->rx_buf.
Used parity8() for address parity calculation.
Added guards for locks.
Dropped num_targets and updated xi3c_master_do_daa().
Used __free(kfree) in xi3c_master_send_bdcast_ccc_cmd().
Dropped PM runtime support.
Updated xi3c_master_read() and xi3c_master_write() with
xi3c_is_resp_available() check.
Created separate functions: xi3c_master_init() and xi3c_master_reinit().
Used xi3c_master_init() in bus initialization and xi3c_master_reinit()
in error paths.
Added DAA structure to xi3c_master structure.

Changes for V3:
Updated commit description.
Corrected the order of properties and removed resets property.
Added compatible to required list.
Added interrupts to example.
Resolved merge conflicts.

Changes for V4:
Added h/w documentation details.
Updated timeout macros.
Removed type casting for xi3c_is_resp_available() macro.
Used ioread32() and iowrite32() instead of readl() and writel()
to keep consistency.
Read XI3C_RESET_OFFSET reg before udelay().
Removed xi3c_master_free_xfer() and directly used kfree().
Skipped checking return value of i3c_master_add_i3c_dev_locked().
Used devm_mutex_init() instead of mutex_init().

Manikanta Guntupalli (2):
  dt-bindings: i3c: Add AMD I3C master controller support
  i3c: master: Add AMD I3C bus controller driver

 .../devicetree/bindings/i3c/xlnx,axi-i3c.yaml |   55 +
 MAINTAINERS                                   |    7 +
 drivers/i3c/master/Kconfig                    |   16 +
 drivers/i3c/master/Makefile                   |    1 +
 drivers/i3c/master/amd-i3c-master.c           | 1014 +++++++++++++++++
 5 files changed, 1093 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/i3c/xlnx,axi-i3c.yaml
 create mode 100644 drivers/i3c/master/amd-i3c-master.c

-- 
2.34.1
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