* Sergei Shtylyov <sshtylyov@xxxxxxxxxx> [100705 12:57]: > 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. It's not needed for omaps, we can already build in support for omap2, omap3 and omap4 into the same kernel binary. If a Kconfig option is needed for optionally compiling in the support for am35x musb, it should be called USB_MUSB_AM35X or similar that gets selected if the boards using it are selected. Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
