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authorCristian Birsan <cristian.birsan@microchip.com>2023-06-16 18:29:32 +0300
committerArnd Bergmann <arnd@arndb.de>2023-06-20 23:03:19 +0200
commit11d5441cde740c89252290e04ad79f133c366bdb (patch)
treefaae134f0a9771a94159fecbde4b211b62ac1029 /arch/arm
parent982e6e1966ace3aa70cbe45822eb848eace78ade (diff)
arm: dts: Enable device-tree overlay support for AT91 boards
Add the '-@' DTC option for AT91 boards that have device-tree overlays. This option populates the '__symbols__' node that contains all the necessary symbols for supporting device-tree overlays (from bootloader) on these devices. This change increases the size of the resulting DTB with ~30%-40%. Below are the measurements performed v6.4-rc6: at91-sam9x60_curiosity.dtb 28499 -> 36641 bytes at91-sam9x60ek.dtb 30867 -> 39609 bytes at91-sama5d27_som1_ek.dtb 26086 -> 34166 bytes at91-sama5d27_wlsom1_ek.dtb 26045 -> 33184 bytes at91-sama5d2_icp.dtb 27521 -> 36155 bytes at91-sama5d2_ptc_ek.dtb 23237 -> 29612 bytes at91-sama5d2_xplained.dtb 27262 -> 35326 bytes at91-sama5d3_eds.dtb 27924 -> 39939 bytes at91-sama5d3_xplained.dtb 28400 -> 40650 bytes at91-sama5d4_xplained.dtb 26456 -> 36107 bytes at91-sama7g5ek.dtb 29212 -> 37289 bytes Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com> Link: https://lore.kernel.org/r/20230616152932.1484154-1-cristian.birsan@microchip.com Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/boot/dts/Makefile14
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index 29b1386e24cd..7e0f392dffde 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -50,9 +50,21 @@ dtb-$(CONFIG_SOC_AT91SAM9) += \
at91sam9g35ek.dtb \
at91sam9x25ek.dtb \
at91sam9x35ek.dtb
+# Enables support for device-tree overlays
+DTC_FLAGS_at91-sam9x60_curiosity := -@
+DTC_FLAGS_at91-sam9x60ek := -@
dtb-$(CONFIG_SOC_SAM9X60) += \
at91-sam9x60_curiosity.dtb \
at91-sam9x60ek.dtb
+# Enables support for device-tree overlays
+DTC_FLAGS_at91-sama5d27_som1_ek := -@
+DTC_FLAGS_at91-sama5d27_wlsom1_ek := -@
+DTC_FLAGS_at91-sama5d2_icp := -@
+DTC_FLAGS_at91-sama5d2_ptc_ek := -@
+DTC_FLAGS_at91-sama5d2_xplained := -@
+DTC_FLAGS_at91-sama5d3_eds := -@
+DTC_FLAGS_at91-sama5d3_xplained := -@
+DTC_FLAGS_at91-sama5d4_xplained := -@
dtb-$(CONFIG_SOC_SAM_V7) += \
at91-kizbox2-2.dtb \
at91-kizbox3-hs.dtb \
@@ -79,6 +91,8 @@ dtb-$(CONFIG_SOC_SAM_V7) += \
at91-sama5d4_xplained.dtb \
at91-sama5d4ek.dtb \
at91-vinco.dtb
+# Enables support for device-tree overlays
+DTC_FLAGS_at91-sama7g5ek := -@
dtb-$(CONFIG_SOC_SAMA7G5) += \
at91-sama7g5ek.dtb
dtb-$(CONFIG_SOC_SP7021) += \