Hi Kevin, Kevin Hilman wrote: > Hemant Pedanekar <hemantp@xxxxxx> writes: > >> This patch updates the common platform files with TI816X specific >> additions. >> >> Also adds new files for TI816X modules base addresseses and irq >> definitions. >> >> Signed-off-by: Hemant Pedanekar <hemantp@xxxxxx> >> --- [...] >> >> diff --git a/arch/arm/mach-omap2/include/mach/entry-macro.S > b/arch/arm/mach-omap2/include/mach/entry-macro.S >> index 50fd749..6516cbd 100644 >> --- a/arch/arm/mach-omap2/include/mach/entry-macro.S >> +++ b/arch/arm/mach-omap2/include/mach/entry-macro.S @@ -34,7 +34,7 @@ >> .endm >> >> /* >> - * Unoptimized irq functions for multi-omap2, 3 and 4 >> + * Unoptimized irq functions for multi-omap2, 3, 4 and ti816x */ >> >> #ifdef MULTI_OMAP2 >> @@ -57,7 +57,8 @@ omap_irq_base: .word 0 [...] >> + bne 9998f >> + >> + /* >> + * ti816x has additional IRQ pending register. Checking this >> + * register on omap2 & omap3 has no effect (read as 0). + */ >> + ldr \irqnr, [\base, #0xf8] /* IRQ pending reg 4 */ >> + cmp \irqnr, #0x0 > > This part makes me a slightly nervous. At least according to > the TRMs, > this address is undefined on OMAP2 & OMAP3 (yet still in the > INTC block.) > Was this tested on OMAP2/3 hardware and verified to return 0? > > You might also consider wrapping this section in > #ifdef CONFIG_ARCH_TI816X so a multi-OMAP kernel without 816x support would > avoid this extra read. > Won't the usage of #ifdef inside MULTI_OMAP2 make things look strange? E.g., #ifdef MULTI_OMAP2 ... #ifdef CONFIG_ARCH_TI816X ... #endif #endif (Specifically, since there is already a custom block present in #else part?) Thanks - Hemant -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
