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<8e7796b2-1e6f-4c91-93d0-a72f6343ab47@gocontroll.com> Date: Fri, 22 Aug 2025 09:35:18 +0200 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/4] dt-bindings: backlight: Add max25014 bindings To: Daniel Thompson Cc: Lee Jones , Daniel Thompson , Jingoo Han , Pavel Machek , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Helge Deller , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fbdev@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org References: <20250819-max25014-v2-0-5fd7aeb141ea@gocontroll.com> <20250819-max25014-v2-1-5fd7aeb141ea@gocontroll.com> Content-Language: en-US From: Maud Spierings In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: AM0PR05CA0088.eurprd05.prod.outlook.com (2603:10a6:208:136::28) To 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=?utf-8?B?MmRzZ0lSMGR1NDNPSkFUZ1E4MUpWQlFIT3NOb2NDaXpPTFB2OW9FcWlydlRE?= =?utf-8?B?TnJ2YkNpaVBlR1N6SzJIL2lyUkY2Rk5qdWZHRHoxQnZ2R1J1MUM1cG1zN0N4?= =?utf-8?B?ell4SkJUMkFQN1lFdHBTdDBEclFnPT0=?= X-OriginatorOrg: gocontroll.com X-MS-Exchange-CrossTenant-Network-Message-Id: 7f37759e-9237-45d7-6b35-08dde14e7220 X-MS-Exchange-CrossTenant-AuthSource: PA4PR04MB7630.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Aug 2025 07:35:19.6267 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 4c8512ff-bac0-4d26-919a-ee6a4cecfc9d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: U2i+z+Hgzfaz3UqM1s9eWUtmTv1m4paCFQ98w+OS+NAcbSh1VclIJaV9KL7uBZDrZhQM7nrdIs8DNSt5WsoI+ceUmZMNt542Iik3s46BXR4= X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM9PR04MB8601 On 8/22/25 09:26, Daniel Thompson wrote: > On Tue, Aug 19, 2025 at 12:58:59PM +0200, Maud Spierings via B4 Relay wrote: >> From: Maud Spierings >> >> The Maxim MAX25014 is a 4-channel automotive grade backlight driver IC >> with intgrated boost controller. >> >> Signed-off-by: Maud Spierings >> --- >> .../bindings/leds/backlight/maxim,max25014.yaml | 79 ++++++++++++++++++++++ >> MAINTAINERS | 5 ++ >> 2 files changed, 84 insertions(+) >> >> diff --git a/Documentation/devicetree/bindings/leds/backlight/maxim,max25014.yaml b/Documentation/devicetree/bindings/leds/backlight/maxim,max25014.yaml >> new file mode 100644 >> index 0000000000000000000000000000000000000000..30b591152fa31d5e43243cac44c72028b05b5f8a >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/leds/backlight/maxim,max25014.yaml >> @@ -0,0 +1,79 @@ >> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) >> +%YAML 1.2 >> +--- >> +$id: http://devicetree.org/schemas/leds/backlight/maxim,max25014.yaml# >> +$schema: http://devicetree.org/meta-schemas/core.yaml# >> + >> +title: Maxim max25014 backlight controller >> + >> +maintainers: >> + - Maud Spierings >> + >> +allOf: >> + - $ref: common.yaml# >> + >> +properties: >> + compatible: >> + enum: >> + - maxim,max25014 >> + >> + reg: >> + maxItems: 1 >> + >> + enable-gpios: >> + maxItems: 1 >> + >> + interrupts: >> + maxItems: 1 > > Is the interrupt useful for anything? > > AFAIK its perfectly OK for DT bindings to describe hardware features the > driver does not use... but is the driver missing out on error reporting > (for example) by not using this interrupt for anything? The interrupt is indeed for error reporting, it is not wired up in the driver right now (although there is already a function for scanning the error registers, I am not sure how I would properly hook that up to an irq. This is my first driver so I thought to keep things simple for now, these extra functions can be added later), same with the pwms for example. But jeah I wanted to fully describe the hardware in the bindings as from what I understand that is what should be done. Kind regards, Maud