Re: [PATCH V3 17/20] RISC-V: time.c: Add ACPI support for time_init()

Sunil V L
2023-03-08T09:44:12Z

On Mon, Mar 06, 2023 at 09:09:11PM +0000, Conor Dooley wrote:
> On Fri, Mar 03, 2023 at 07:06:44PM +0530, Sunil V L wrote:
> > On ACPI based platforms, timer related information is
> > available in RHCT. Add ACPI based probe support to the
> > timer initialization.
> >
> > Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
> > Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> > Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
> > ---
> > arch/riscv/kernel/time.c | 23 +++++++++++++++++------
> > 1 file changed, 17 insertions(+), 6 deletions(-)
> >
> > diff --git a/arch/riscv/kernel/time.c b/arch/riscv/kernel/time.c
> > index babaf3b48ba8..2c29543549c3 100644
> > --- a/arch/riscv/kernel/time.c
> > +++ b/arch/riscv/kernel/time.c
> > @@ -4,6 +4,7 @@
> > * Copyright (C) 2017 SiFive
> > */
> >
> > +#include <linux/acpi.h>
> > #include <linux/of_clk.h>
> > #include <linux/clockchips.h>
> > #include <linux/clocksource.h>
> > @@ -18,17 +19,27 @@ EXPORT_SYMBOL_GPL(riscv_timebase);
> > void __init time_init(void)
> > {
> > struct device_node *cpu;
> > + struct acpi_table_rhct *rhct;
> > + acpi_status status;
> > u32 prop;
> >
> > - cpu = of_find_node_by_path("/cpus");
> > - if (!cpu || of_property_read_u32(cpu, "timebase-frequency", &prop))
> > - panic(KERN_WARNING "RISC-V system with no 'timebase-frequency' in DTS\n");
> > - of_node_put(cpu);
> > - riscv_timebase = prop;
> > + if (acpi_disabled) {
> > + cpu = of_find_node_by_path("/cpus");
> > + if (!cpu || of_property_read_u32(cpu, "timebase-frequency", &prop))
> > + panic("RISC-V system with no 'timebase-frequency' in DTS\n");
>
> I appreciate that it was like this before, but a newline here (and in
> the corresponding spot below) would be nice.
Sure!. Will update in next revision.

Thanks,
Sunil