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/kernel/linux/linux-5.10/Documentation/devicetree/bindings/timer/
Dsifive,clint.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/timer/sifive,clint.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Palmer Dabbelt <palmer@dabbelt.com>
11 - Anup Patel <anup.patel@wdc.com>
14 SiFive (and other RISC-V) SOCs include an implementation of the SiFive
15 Core Local Interruptor (CLINT) for M-mode timer and M-mode inter-processor
16 interrupts. It directly connects to the timer and inter-processor interrupt
17 lines of various HARTs (or CPUs) so RISC-V per-HART (or per-CPU) local
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/kernel/linux/linux-5.10/drivers/clocksource/
Dtimer-clint.c1 // SPDX-License-Identifier: GPL-2.0
5 * Most of the M-mode (i.e. NoMMU) RISC-V systems usually have a
6 * CLINT MMIO timer device.
9 #define pr_fmt(fmt) "clint: " fmt
18 #include <linux/io-64-nonatomic-lo-hi.h>
25 #include <asm/clint.h>
32 /* CLINT manages IPI and Timer for RISC-V M-mode */
123 ce->cpumask = cpumask_of(cpu); in clint_timer_starting_cpu()
142 evdev->event_handler(evdev); in clint_timer_interrupt()
155 * Ensure that CLINT device interrupts are either RV_IRQ_TIMER or in clint_timer_init_dt()
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DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
165 Enable 24-bit TIMER0 and TIMER1 counters in the NPCM7xx architecture,
188 32-bit free running decrementing counters.
242 bool "Integrator-AP timer driver" if COMPILE_TEST
245 Enables support for the Integrator-AP timer.
278 available on many OMAP-like platforms.
287 It has a 64-bit counter with update rate up to 1000MHz.
288 This counter is accessed via couple of 32-bit memory-mapped registers.
307 bool "Support for 32-bit TIMERn counters in ARC Cores" if COMPILE_TEST
311 These are legacy 32-bit TIMER0 and TIMER1 counters found on all ARC cores
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DMakefile1 # SPDX-License-Identifier: GPL-2.0
2 obj-$(CONFIG_TIMER_OF) += timer-of.o
3 obj-$(CONFIG_TIMER_PROBE) += timer-probe.o
4 obj-$(CONFIG_ATMEL_PIT) += timer-atmel-pit.o
5 obj-$(CONFIG_ATMEL_ST) += timer-atmel-st.o
6 obj-$(CONFIG_ATMEL_TCB_CLKSRC) += timer-atmel-tcb.o
7 obj-$(CONFIG_X86_PM_TIMER) += acpi_pm.o
8 obj-$(CONFIG_SCx200HR_TIMER) += scx200_hrt.o
9 obj-$(CONFIG_CS5535_CLOCK_EVENT_SRC) += timer-cs5535.o
10 obj-$(CONFIG_CLKSRC_JCORE_PIT) += jcore-pit.o
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/kernel/linux/linux-5.10/arch/riscv/include/asm/
Dclint.h1 /* SPDX-License-Identifier: GPL-2.0-only */
14 * This lives in the CLINT driver, but is accessed directly by timex.h to avoid
17 * The ISA defines mtime as a 64-bit memory-mapped register that increments at
21 * like "riscv_mtime", to signify that these non-ISA assumptions must hold.
Dtimex.h1 /* SPDX-License-Identifier: GPL-2.0-only */
15 #include <asm/clint.h>
/kernel/linux/linux-5.10/arch/riscv/boot/dts/kendryte/
Dk210.dtsi1 // SPDX-License-Identifier: GPL-2.0+
6 #include <dt-bindings/clock/k210-clk.h>
10 * Although the K210 is a 64-bit CPU, the address bus is only 32-bits
13 #address-cells = <1>;
14 #size-cells = <1>;
23 * Since this is a non-ratified draft specification, the kernel does not
28 #address-cells = <1>;
29 #size-cells = <0>;
30 timebase-frequency = <7800000>;
36 mmu-type = "none";
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