Comments on: Linux Device Tree: What those status = “okay” are about https://billauer.se/blog/2017/02/linux-dts-dtsi-status-ok/ Anything I found worthy to write down. Thu, 26 Mar 2026 13:15:15 +0000 hourly 1 http://wordpress.org/?v=3.1.2 By: 3V3RYONE https://billauer.se/blog/2017/02/linux-dts-dtsi-status-ok/comment-page-1/#comment-1842 3V3RYONE Fri, 11 Jul 2025 11:49:19 +0000 https://billauer.se/blog/?p=5111#comment-1842 With the mainline Linux kernel, the "of_device_is_available()" function will return true even if the status property is not present in the device tree node. Code: ``` 468 /** 469 * __of_device_is_available - check if a device is available for use 470 * 471 * @device: Node to check for availability, with locks already held 472 * 473 * Return: True if the status property is absent or set to "okay" or "ok", 474 * false otherwise 475 */ 476 static bool __of_device_is_available(const struct device_node *device) 477 { 478 static const char * const ok[] = {"okay", "ok", NULL}; 479 480 if (!device) 481 return false; 482 483 return !__of_get_property(device, "status", NULL) || 484 __of_device_is_status(device, ok); 485 ``` With the mainline Linux kernel,
the “of_device_is_available()” function will return true even if the status property is not present in the device tree node.

Code:

“`
468 /**
469 * __of_device_is_available – check if a device is available for use
470 *
471 * @device: Node to check for availability, with locks already held
472 *
473 * Return: True if the status property is absent or set to “okay” or “ok”,
474 * false otherwise
475 */
476 static bool __of_device_is_available(const struct device_node *device)
477 {
478 static const char * const ok[] = {“okay”, “ok”, NULL};
479
480 if (!device)
481 return false;
482
483 return !__of_get_property(device, “status”, NULL) ||
484 __of_device_is_status(device, ok);
485
“`

]]> By: Albert Lin https://billauer.se/blog/2017/02/linux-dts-dtsi-status-ok/comment-page-1/#comment-1807 Albert Lin Thu, 17 Oct 2024 06:11:44 +0000 https://billauer.se/blog/?p=5111#comment-1807 This is very good and clear article! This is very good and clear article!

]]> By: ranran https://billauer.se/blog/2017/02/linux-dts-dtsi-status-ok/comment-page-1/#comment-1390 ranran Wed, 19 Dec 2018 09:19:40 +0000 https://billauer.se/blog/?p=5111#comment-1390 thank you for the valuable articles! thank you for the valuable articles!

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