[PATCH 0/3] leds: lp55xx: Fix the LP5569 LED mapping table placement

[Arthur Crepin Leblond]

The LP5569 and LP5523 keep a per-engine LED mapping table in the SRAM.
The table is read by the engine's map_* instructions.

On LP5569, the instruction loads a table from a 7-bits absolute SRAM
address (0-127), therefore the mapping table address must be in the
lower-half of the SRAM.

This series makes the layout configurable and fixes the LP5569:

  - lp55xx: Add program and mux base pages to the device config
    - Add prog_page_base and mux_page_base to struct
      lp55xx_device_config and use them for the engine program pages
      and for the mapping tables written by the engineN_leds attribute.
    - lp5569/lp5523/lp8501: set values matching their current layout,
      so their behavior is unchanged.

  - lp5569: Place the LED mapping table in the lower half of the SRAM
    - Place the mapping table at pages 0-2 (address 0x00/0x10/0x20)
    - Place the engine programs at addresses 0x30/0x70/0xb0 (4 pages
      per engine)

Tested on a Raspberry Pi Zero 2W.

Arthur Crepin Leblond

Signed-off-by: Arthur Crepin Leblond <arthur@xxxxxxxxxxxxx>
---
Arthur Crepin Leblond (3):
      leds: lp55xx: Add program and mux base pages to the device config
      leds: leds-lp5569: Place the LED mapping table in the lower half of the SRAM
      Documentation: leds: lp55xx: Add an LP5569 example

 Documentation/leds/leds-lp55xx.rst | 24 +++++++++++++++++
 drivers/leds/leds-lp5523.c         |  4 +++
 drivers/leds/leds-lp5569.c         | 53 ++++++++++++++++++++++++++------------
 drivers/leds/leds-lp55xx-common.c  | 14 +++++-----
 drivers/leds/leds-lp55xx-common.h  |  6 +++++
 drivers/leds/leds-lp8501.c         |  2 ++
 6 files changed, 80 insertions(+), 23 deletions(-)
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base-commit: c190ff288cb5c09e1b30db9e51a11d979d27f5b9
change-id: 20261026-lp55xx-1bdb2c9d8fc1