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author | Gregory Nutt <gnutt@nuttx.org> | 2014-04-14 12:26:49 -0600 |
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committer | Gregory Nutt <gnutt@nuttx.org> | 2014-04-14 12:26:49 -0600 |
commit | 09c8278b8677125f5160be9593fccfd53286bbfc (patch) | |
tree | 3a9ab0b135a77d6f3c97e134afdb1315699cdc56 /apps/examples/touchscreen/Kconfig | |
parent | df4aeab705353232c78e614b56296e585f833fa4 (diff) | |
download | nuttx-09c8278b8677125f5160be9593fccfd53286bbfc.tar.gz nuttx-09c8278b8677125f5160be9593fccfd53286bbfc.tar.bz2 nuttx-09c8278b8677125f5160be9593fccfd53286bbfc.zip |
examples/touchscreen: Add a configuration option to indicate that there is or is not an architecture-specific initialization function
Diffstat (limited to 'apps/examples/touchscreen/Kconfig')
-rw-r--r-- | apps/examples/touchscreen/Kconfig | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/apps/examples/touchscreen/Kconfig b/apps/examples/touchscreen/Kconfig index 5e7739c35..b75546c8b 100644 --- a/apps/examples/touchscreen/Kconfig +++ b/apps/examples/touchscreen/Kconfig @@ -43,4 +43,25 @@ config EXAMPLES_TOUCHSCREEN_MOUSE The touchscreen test can also be configured to work with a mouse driver by setting this option. +config EXAMPLES_TOUCHSCREEN_ARCHINIT + bool "Architecture-specific initialization" + default y + ---help--- + By default, the touchscreen example will call arch_tcinitialize() to + register the touchscreen device before it attempts to open it. + Similarly, it will call arch_tcuninitialize() to unregister the + touchscreen device when it is finished. + + This works well for the typical touchscreen controller but there are + other devices that cannot be initialized and uninitialized in this + fashion. Consider a USB mouse, fo example. The USB mouse will be + registered when the mouse is connected and unregistered when the + mouse is disconnected. + + So, in cases like this, there are two options: (1) provide dummy + arch_tcinitialize() and arch_tcuninitialize() just to satisfy the + linking requirements or, (2) select this option. if this option is + de-selected, then the arch_tcinitialize() and arch_tcuninitialize() will + never be called. + endif |