This adds an explanation of which Raspberry Pi models each target option
supports.
Signed-off-by: Stephen Warren <swar...@wwwdotorg.org>
---
arch/arm/mach-bcm283x/Kconfig | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-bcm283x/Kconfig b/arch/arm/mach-bcm283x/Kconfig
index dc6770437ec6..0790dd02d6f0 100644
--- a/arch/arm/mach-bcm283x/Kconfig
+++ b/arch/arm/mach-bcm283x/Kconfig
@@ -14,12 +14,29 @@ choice
optional
config TARGET_RPI
- bool "Raspberry Pi"
+ bool "Raspberry Pi (all BCM2835 variants)"
+ help
+ Support for all ARM1176-/BCM2835-based Raspberry Pi variants, such as
+ the A, A+, B, B+, Compute Module, and Zero. This option cannot
+ support BCM2836/BCM2837-based Raspberry Pis such as the RPi 2 and
+ RPi 3 due to different peripheral address maps.
+
+ This option creates a build targetting the ARM1176 ISA.
select BCM2835
select CPU_ARM1176
config TARGET_RPI_2
bool "Raspberry Pi 2"
+ help
+ Support for all BCM2836-based Raspberry Pi variants, such as
+ the RPi 2 model B.
+
+ This option should also support BCM2837-based variants such as the
+ RPi 3 model B, when run in 32-bit mode, provided you have configured
+ the VideoCore firmware (via config.txt) to select the PL011 UART for
+ the console (the default is the mini UART on the RPi 3).
+
+ This option creates a build targetting the ARMv7/AArch32 ISA.
select ARMV7_LPAE
select BCM2836
select CPU_V7
--
2.7.3
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