linux-kernel - [PATCH RFC v4 0/2] leds-lp50xx: Support reg to set multi

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Message-ID: <20250526-led-fix-v4-0-33345f6c4a78@axis.com>
Date: Mon, 26 May 2025 16:53:59 +0200
From: Johan Adolfsson <johan.adolfsson@...s.com>
To: Lee Jones <lee@...nel.org>, Pavel Machek <pavel@...nel.org>, Rob Herring
	<robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
	<conor+dt@...nel.org>, Andrew Davis <afd@...com>, Jacek Anaszewski
	<jacek.anaszewski@...il.com>
CC: <linux-leds@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<devicetree@...r.kernel.org>, Johan Adolfsson <johan.adolfsson@...s.com>,
	<kernel@...s.com>
Subject: [PATCH RFC v4 0/2] leds-lp50xx: Support reg to set multi_index.

Since devicetree nodes are (sometimes?) processed in reverse order,
support reg as the actual multi_index index so yo get well defined
color order presented in the multi_index file.
Not sure if reusing reg for this is the correct way or if another
property such as "multi_index" or similar should be used instead.
Looks like reg is used for similar things at least.
Or should the whole "reverse the devicetree" problem be fixed instead?
Update bindings to match implementation, and add description for the
reg property.

Signed-off-by: Johan Adolfsson <johan.adolfsson@...s.com>
---
Changes in v4:
- Remove maxItems from devicetree schema, not compatible with minimum
  and maximum.
- Link to v3: https://lore.kernel.org/r/20250523-led-fix-v3-0-86d2690d2698@axis.com

Changes in v3:
- Update To and Cc.
- Rephrase bindings descriptions, add constraints.
- Link to v2: https://lore.kernel.org/r/20250522-led-fix-v2-0-652046323ec3@axis.com

Changes in v2:
- Avoid duplicate assignment. dev_err and return -EINVAL on error.
- Update bindings doc.
- Link to v1: https://lore.kernel.org/r/20250506-led-fix-v1-1-56a39b55a7fc@axis.com

---
Johan Adolfsson (2):
      leds: leds-lp50xx: Handle reg to get correct multi_index
      dt-bindings: leds: lp50xx: Document child reg, fix example

 .../devicetree/bindings/leds/leds-lp50xx.yaml         | 19 ++++++++++++-------
 drivers/leds/leds-lp50xx.c                            |  8 +++++++-
 2 files changed, 19 insertions(+), 8 deletions(-)
---
base-commit: 0ff41df1cb268fc69e703a08a57ee14ae967d0ca
change-id: 20250225-led-fix-444fb544584a

Best regards,
-- 
Johan Adolfsson <johan.adolfsson@...s.com>