Hello.
Tony Lindgren wrote:
AM35x has musb interface (version 1.8) and uses CPPI41 DMA engine.
It has USB phy built inside the IP itself.
Also added ARCH_AM35x which is required to differentiate musb ips
between OMAP3x and AM35x. This config would be used for below purposes,
- Select am35x.c instead of omap2430.c for compilation
at drivers/usb/musb directory. Please note there are
significant differneces in these two files as musb ip
in quite different on AM35x.
- Select workaround codes applicable for AM35x musb issues.
one such workaround is for bytewise read issue on AM35x.
<snip>
diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
index b31b6f1..52a6752 100644
--- a/arch/arm/mach-omap2/Kconfig
+++ b/arch/arm/mach-omap2/Kconfig
@@ -84,6 +84,7 @@ config MACH_OMAP3517EVM
bool "OMAP3517/ AM3517 EVM board"
depends on ARCH_OMAP3
select OMAP_PACKAGE_CBB
+ select ARCH_AM35x
config MACH_OMAP3_PANDORA
bool "OMAP3 Pandora"
No thanks..
--- a/arch/arm/plat-omap/Kconfig
+++ b/arch/arm/plat-omap/Kconfig
@@ -5,6 +5,14 @@ menu "TI OMAP Implementations"
config ARCH_OMAP_OTG
bool
+config ARCH_AM35x
+ bool
+ help
+ Select this option if your platform is based on AM35x. As
+ AM35x has an updated MUSB with CPPI4.1 DMA so this config
+ is introduced to differentiate musb ip between OMAP3x and
+ AM35x platforms.
+
choice
prompt "OMAP System Type"
default ARCH_OMAP2PLUS
..this should not be needed.
I think Ajay has explained why it's needed. The option is necessary in one
or another form.
Regards,
Tony
WBR, Sergei
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