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Wed, 1 Sep 2021 08:39:08 +0000 From: "hamza.farooq@siemens.com" To: Andy Shevchenko CC: Linux Kernel Mailing List , Linux LED Subsystem , Platform Driver , "henning.schild@siemens.com" , "jan.kiszka@siemens.com" , "Haeussler, Gerd" Subject: Define LEDs with mixed colors Thread-Topic: Define LEDs with mixed colors Thread-Index: AdefC/4ZhHUj2Mp2SWmM9Mt1YYYklQ== Content-Class: Date: Wed, 1 Sep 2021 08:39:08 +0000 Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: msip_labels: MSIP_Label_a59b6cd5-d141-4a33-8bf1-0ca04484304f_Enabled=true; MSIP_Label_a59b6cd5-d141-4a33-8bf1-0ca04484304f_SetDate=2021-09-01T08:39:06Z; MSIP_Label_a59b6cd5-d141-4a33-8bf1-0ca04484304f_Method=Standard; MSIP_Label_a59b6cd5-d141-4a33-8bf1-0ca04484304f_Name=restricted-default; MSIP_Label_a59b6cd5-d141-4a33-8bf1-0ca04484304f_SiteId=38ae3bcd-9579-4fd4-adda-b42e1495d55a; MSIP_Label_a59b6cd5-d141-4a33-8bf1-0ca04484304f_ActionId=4921ba3e-c1c8-415f-b8e2-63b946920111; MSIP_Label_a59b6cd5-d141-4a33-8bf1-0ca04484304f_ContentBits=0 document_confidentiality: Restricted authentication-results: gmail.com; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: siemens.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DBAPR10MB4219.EURPRD10.PROD.OUTLOOK.COM X-MS-Exchange-CrossTenant-Network-Message-Id: 5fc7206b-cafe-4e6f-6c90-08d96d23f6fd X-MS-Exchange-CrossTenant-originalarrivaltime: 01 Sep 2021 08:39:08.3089 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 38ae3bcd-9579-4fd4-adda-b42e1495d55a X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: LVfSCxrL+yE/WBXb1NIDp7u+shMPNQ8HaonThNnuf8NPcoCmUEE1c0yKArNkzGcV2/GrOSvEPe4eHQGOQ+zT+xiIyldq7iDWUtkeaRPr1yQ= X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB8PR10MB3529 Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org Hello all, I am toying with the idea of writing a multicolor LED GPIO driver. What wou= ld be the right way to define mixed color LEDs (for leds-gpio), in device t= ree or ACPI? Consider the following: leds { compatible =3D "gpio-leds"; led0 { gpios =3D <&mcu_pio 0 GPIO_ACTIVE_LOW>; color =3D ; }; led1 { gpios =3D <&mcu_pio 1 GPIO_ACTIVE_HIGH>; color =3D ; }; led2 { gpios =3D <&mcu_pio 0 GPIO_ACTIVE_LOW &mcu_pio 1 GPIO_ACTIVE_LOW>; color =3D ; }; }; This probably won't work as "gpios" seem to be single object in gpio-leds d= river code, but what can I do to achieve something similar? It is important to define this LED in DT/ACPI in order for the user app to = see it in the /sys/class/led folder, without having to write platform-speci= fic driver. Best, Hamza