dtoc: Support multiple compatible strings in a node

[oweals/u-boot.git] / doc / driver-model / of-plat.txt

diff --git a/doc/driver-model/of-plat.txt b/doc/driver-model/of-plat.txt
index 0063bfe510cd7fbffdb01ba5a5994ac4d8369398..3ed8c759d691d925c8c7a9be703c17bc59ca6970 100644 (file)
--- a/doc/driver-model/of-plat.txt
+++ b/doc/driver-model/of-plat.txt
@@ -156,6 +156,11 @@ This avoids the code overhead of converting the device tree data to
 platform data in the driver. The ofdata_to_platdata() method should
 therefore do nothing in such a driver.
 
+Where a node has multiple compatible strings, a #define is used to make them
+equivalent, e.g.:
+
+#define dtd_rockchip_rk3299_dw_mshc dtd_rockchip_rk3288_dw_mshc
+
 
 Converting of-platdata to a useful form
 ---------------------------------------