| Message ID | 64d18c5a07bf7680b8299f3ef98303e60522e738.1361186097.git.afzal@ti.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Monday 18 February 2013 05:08 PM, Afzal Mohammed wrote: > Describe minimal DT boot machine details for AM43 based SoC's. AM43 > family of SoC's are ARM Cortex-A9 based with one core in SMP > configuration. Low level debug could be achieved by selecting > DEBUG_AM33XXUART1. To boot AM43 SoC, this change is sufficient w.r.t > Kernel (considering the fact that strictly speaking DT sources does > not classify as a part of Kernel). Here private timer of the one and > only core is being used as clock event (as well as, as time source). > > Signed-off-by: Afzal Mohammed <afzal@ti.com> > --- As discussed already, lets just call this as Cortex-A9 single core machine to avoid confusion. > arch/arm/mach-omap2/board-generic.c | 18 ++++++++++++++++++ > 1 file changed, 18 insertions(+) > > diff --git a/arch/arm/mach-omap2/board-generic.c b/arch/arm/mach-omap2/board-generic.c > index 0274ff7..e083f08 100644 > --- a/arch/arm/mach-omap2/board-generic.c > +++ b/arch/arm/mach-omap2/board-generic.c > @@ -15,7 +15,10 @@ > #include <linux/of_irq.h> > #include <linux/of_platform.h> > #include <linux/irqdomain.h> > +#include <linux/irqchip.h> > > +#include <asm/mach/map.h> > +#include <asm/smp_twd.h> > #include <asm/mach/arch.h> > > #include "common.h" > @@ -182,3 +185,18 @@ DT_MACHINE_START(OMAP5_DT, "Generic OMAP5 (Flattened Device Tree)") > .restart = omap44xx_restart, > MACHINE_END > #endif > + > +#ifdef CONFIG_SOC_AM43 > +static const char *am43_boards_compat[] __initdata = { > + "ti,am43", > + NULL, > +}; > + > +DT_MACHINE_START(AM43_DT, "Generic AM43 (Flattened Device Tree)") > + .map_io = debug_ll_io_init, > + .init_irq = irqchip_init, With Arnds patch [1], the above can be dropped.. > + .init_machine = omap_generic_init, > + .init_time = twd_local_timer_of_register, This one needs to take care of other timers as well from start. So better to take that approach from start. Regards, Santosh [1] https://patchwork.kernel.org/patch/2074871/
diff --git a/arch/arm/mach-omap2/board-generic.c b/arch/arm/mach-omap2/board-generic.c index 0274ff7..e083f08 100644 --- a/arch/arm/mach-omap2/board-generic.c +++ b/arch/arm/mach-omap2/board-generic.c @@ -15,7 +15,10 @@ #include <linux/of_irq.h> #include <linux/of_platform.h> #include <linux/irqdomain.h> +#include <linux/irqchip.h> +#include <asm/mach/map.h> +#include <asm/smp_twd.h> #include <asm/mach/arch.h> #include "common.h" @@ -182,3 +185,18 @@ DT_MACHINE_START(OMAP5_DT, "Generic OMAP5 (Flattened Device Tree)") .restart = omap44xx_restart, MACHINE_END #endif + +#ifdef CONFIG_SOC_AM43 +static const char *am43_boards_compat[] __initdata = { + "ti,am43", + NULL, +}; + +DT_MACHINE_START(AM43_DT, "Generic AM43 (Flattened Device Tree)") + .map_io = debug_ll_io_init, + .init_irq = irqchip_init, + .init_machine = omap_generic_init, + .init_time = twd_local_timer_of_register, + .dt_compat = am43_boards_compat, +MACHINE_END +#endif
Describe minimal DT boot machine details for AM43 based SoC's. AM43 family of SoC's are ARM Cortex-A9 based with one core in SMP configuration. Low level debug could be achieved by selecting DEBUG_AM33XXUART1. To boot AM43 SoC, this change is sufficient w.r.t Kernel (considering the fact that strictly speaking DT sources does not classify as a part of Kernel). Here private timer of the one and only core is being used as clock event (as well as, as time source). Signed-off-by: Afzal Mohammed <afzal@ti.com> --- arch/arm/mach-omap2/board-generic.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)