From:   Sunil V L <sunilvl@ventanamicro.com>
To:     Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        "Rafael J . Wysocki" <rafael@kernel.org>,
        Len Brown <lenb@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Marc Zyngier <maz@kernel.org>,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
        Jonathan Corbet <corbet@lwn.net>
Cc:     linux-riscv@lists.infradead.org, linux-acpi@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
        Anup Patel <apatel@ventanamicro.com>,
        Andrew Jones <ajones@ventanamicro.com>,
        Atish Patra <atishp@rivosinc.com>,
        Sunil V L <sunilvl@ventanamicro.com>
Subject: [PATCH 16/24] RISC-V: ACPI: clocksource/timer-riscv: Add ACPI support
Date:   Mon, 30 Jan 2023 23:52:17 +0530
Message-Id: <20230130182225.2471414-17-sunilvl@ventanamicro.com>
In-Reply-To: <20230130182225.2471414-1-sunilvl@ventanamicro.com>
References: <20230130182225.2471414-1-sunilvl@ventanamicro.com>
MIME-Version: 1.0
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timer-riscv driver needs to get the timebase-frequency from
RISC-V Hart Capabilities Table (RHCT) on ACPI platforms. Add
support to read the information from RHCT.

Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
---
 drivers/clocksource/timer-riscv.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/clocksource/timer-riscv.c b/drivers/clocksource/timer-riscv.c
index 4016c065a01c..8079666753a6 100644
--- a/drivers/clocksource/timer-riscv.c
+++ b/drivers/clocksource/timer-riscv.c
@@ -10,6 +10,7 @@
 
 #define pr_fmt(fmt) "riscv-timer: " fmt
 
+#include <linux/acpi.h>
 #include <linux/clocksource.h>
 #include <linux/clockchips.h>
 #include <linux/cpu.h>
@@ -198,3 +199,11 @@ static int __init riscv_timer_init_dt(struct device_node *n)
 }
 
 TIMER_OF_DECLARE(riscv_timer, "riscv", riscv_timer_init_dt);
+
+#ifdef CONFIG_ACPI
+static int __init riscv_timer_acpi_init(struct acpi_table_header *table)
+{
+	return riscv_timer_init_common();
+}
+TIMER_ACPI_DECLARE(aclint_mtimer, ACPI_SIG_RHCT, riscv_timer_acpi_init);
+#endif
-- 
2.38.0