From: Andrew Jones <ajones@ventanamicro.com>
To: Sunil V L <sunilvl@ventanamicro.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Paul Walmsley <paul.walmsley@sifive.com>,
"Rafael J . Wysocki" <rafael@kernel.org>,
Len Brown <lenb@kernel.org>, Thomas Gleixner <tglx@linutronix.de>,
Marc Zyngier <maz@kernel.org>, Jonathan Corbet <corbet@lwn.net>,
linux-riscv@lists.infradead.org, linux-acpi@vger.kernel.org,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
Conor Dooley <conor.dooley@microchip.com>,
Anup Patel <apatel@ventanamicro.com>,
Atish Patra <atishp@rivosinc.com>,
"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>
Subject: Re: [PATCH V2 17/21] RISC-V: time.c: Add ACPI support for time_init()
Date: Mon, 20 Feb 2023 20:58:08 +0100 [thread overview]
Message-ID: <20230220195808.reyuclvefujucpsq@orel> (raw)
In-Reply-To: <20230216182043.1946553-18-sunilvl@ventanamicro.com>
On Thu, Feb 16, 2023 at 11:50:39PM +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>
> ---
> arch/riscv/kernel/time.c | 25 +++++++++++++++++++------
> 1 file changed, 19 insertions(+), 6 deletions(-)
>
> diff --git a/arch/riscv/kernel/time.c b/arch/riscv/kernel/time.c
> index 1cf21db4fcc7..e49b897fc657 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 +19,29 @@ 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");
> + of_node_put(cpu);
> + riscv_timebase = prop;
> + } else {
> + status = acpi_get_table(ACPI_SIG_RHCT, 0, (struct acpi_table_header **)&rhct);
> + if (ACPI_FAILURE(status))
> + panic("RISC-V ACPI system with no RHCT table\n");
> + riscv_timebase = rhct->time_base_freq;
> + acpi_put_table((struct acpi_table_header *)rhct);
> + }
>
> lpj_fine = riscv_timebase / HZ;
>
> - of_clk_init(NULL);
> + if (acpi_disabled)
> + of_clk_init(NULL);
I think we should be able to move of_clk_init() up into the acpi_disabled
arm rather than add another if here.
> +
> timer_probe();
>
> tick_setup_hrtimer_broadcast();
> --
> 2.34.1
>
Otherwise,
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
next prev parent reply other threads:[~2023-02-20 19:58 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-16 18:20 [PATCH V2 00/21] Add basic ACPI support for RISC-V Sunil V L
2023-02-16 18:20 ` [PATCH V2 01/21] riscv: move sbi_init() earlier before jump_label_init() Sunil V L
2023-02-16 18:20 ` [PATCH V2 02/21] ACPICA: MADT: Add RISC-V INTC interrupt controller Sunil V L
2023-02-16 18:20 ` [PATCH V2 03/21] ACPICA: Add structure definitions for RISC-V RHCT Sunil V L
2023-02-16 18:20 ` [PATCH V2 04/21] RISC-V: Add support to build the ACPI core Sunil V L
2023-02-20 15:44 ` Andrew Jones
2023-02-24 9:00 ` Sunil V L
2023-02-16 18:20 ` [PATCH V2 05/21] ACPI: Kconfig: Enable ACPI_PROCESSOR for RISC-V Sunil V L
2023-02-20 16:05 ` Andrew Jones
2023-02-24 8:45 ` Sunil V L
2023-02-16 18:20 ` [PATCH V2 06/21] ACPI: OSL: Make should_use_kmap() 0 " Sunil V L
2023-02-16 18:20 ` [PATCH V2 07/21] ACPI: processor_core: RISC-V: Enable mapping processor to the hartid Sunil V L
2023-02-20 16:10 ` Andrew Jones
2023-02-16 18:20 ` [PATCH V2 08/21] drivers/acpi: RISC-V: Add RHCT related code Sunil V L
2023-02-20 16:36 ` Andrew Jones
2023-02-24 12:03 ` Sunil V L
2023-02-16 18:20 ` [PATCH V2 09/21] RISC-V: smpboot: Create wrapper smp_setup() Sunil V L
2023-02-20 16:37 ` Andrew Jones
2023-02-16 18:20 ` [PATCH V2 10/21] RISC-V: smpboot: Add ACPI support in smp_setup() Sunil V L
2023-02-20 17:08 ` Andrew Jones
2023-02-24 16:50 ` Sunil V L
2023-02-24 17:06 ` Andrew Jones
2023-02-16 18:20 ` [PATCH V2 11/21] RISC-V: ACPI: Add a function to retrieve the hartid Sunil V L
2023-02-20 17:34 ` Andrew Jones
2023-02-16 18:20 ` [PATCH V2 12/21] RISC-V: cpufeature: Add ACPI support in riscv_fill_hwcap() Sunil V L
2023-02-20 17:45 ` Andrew Jones
2023-02-16 18:20 ` [PATCH V2 13/21] RISC-V: cpu: Enable cpuinfo for ACPI systems Sunil V L
2023-02-20 17:54 ` Andrew Jones
2023-02-24 12:27 ` Sunil V L
2023-02-16 18:20 ` [PATCH V2 14/21] irqchip/riscv-intc: Add ACPI support Sunil V L
2023-02-20 19:37 ` Andrew Jones
2023-02-24 12:29 ` Sunil V L
2023-02-16 18:20 ` [PATCH V2 15/21] clocksource/timer-riscv: Refactor riscv_timer_init_dt() Sunil V L
2023-02-20 19:47 ` Andrew Jones
2023-02-16 18:20 ` [PATCH V2 16/21] clocksource/timer-riscv: Add ACPI support Sunil V L
2023-02-20 19:51 ` Andrew Jones
2023-02-16 18:20 ` [PATCH V2 17/21] RISC-V: time.c: Add ACPI support for time_init() Sunil V L
2023-02-20 19:58 ` Andrew Jones [this message]
2023-02-24 12:33 ` Sunil V L
2023-02-16 18:20 ` [PATCH V2 18/21] RISC-V: Add ACPI initialization in setup_arch() Sunil V L
2023-02-20 20:07 ` Andrew Jones
2023-02-24 12:36 ` Sunil V L
2023-02-24 13:07 ` Andrew Jones
2023-02-24 14:44 ` Sunil V L
2023-02-16 18:20 ` [PATCH V2 19/21] RISC-V: Enable ACPI in defconfig Sunil V L
2023-02-20 20:09 ` Andrew Jones
2023-02-24 8:46 ` Sunil V L
2023-02-16 18:20 ` [PATCH V2 20/21] MAINTAINERS: Add entry for drivers/acpi/riscv Sunil V L
2023-02-20 20:14 ` Andrew Jones
2023-02-24 12:38 ` Sunil V L
2023-02-16 18:20 ` [PATCH V2 21/21] Documentation/kernel-parameters.txt: Add RISC-V for ACPI parameter Sunil V L
2023-02-20 20:15 ` Andrew Jones
2023-02-24 12:37 ` Sunil V L
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