pico: also move blit_driver

Author: Daft-Freak

32blit-pico/CMakeLists.txt

@@ -26,16 +26,6 @@ target_compile_options(BlitEngine PRIVATE -ffunction-sections -fdata-sections)
 
 add_subdirectory(../32blit-shared ../32blit-shared)
 
-# driver helper
-# can override driver choice by pre-setting BLIT_x_DRIVER
-function(blit_driver DRV NAME)
-    set(var BLIT_${DRV}_DRIVER)
-    string(TOUPPER ${var} var)
-
-    if(NOT ${var})
-        set(${var} ${NAME} PARENT_SCOPE)
-    endif()
-endfunction()
 
 add_library(BlitHalPico INTERFACE)
 target_sources(BlitHalPico INTERFACE

32blit-pico/board-config.cmake

@@ -1,3 +1,14 @@
+# driver helper
+# can override driver choice by pre-setting BLIT_x_DRIVER
+function(blit_driver DRV NAME)
+    set(var BLIT_${DRV}_DRIVER)
+    string(TOUPPER ${var} var)
+
+    if(NOT ${var})
+        set(${var} ${NAME} PARENT_SCOPE)
+    endif()
+endfunction()
+
 if(DEFINED PICO_ADDON)
     # for boards that don't have a board in the pico sdk
     # (usually because they are an add-on for a regular pico)