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authorLinus Torvalds <torvalds@linux-foundation.org>2023-06-30 19:37:26 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2023-06-30 19:37:26 +0300
commit533925cb760431cb496a8c965cfd765a1a21d37e (patch)
treec43ac0f7d69f9b9a3f1e18509a9a75654cbb3607 /drivers/clocksource
parentd8b0bd57c2d68eb500f356f0f9228e6183da94ae (diff)
parent488833ccdcac118da16701f4ee0673b20ba47fe3 (diff)
downloadlinux-533925cb760431cb496a8c965cfd765a1a21d37e.tar.xz
Merge tag 'riscv-for-linus-6.5-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V updates from Palmer Dabbelt: - Support for ACPI - Various cleanups to the ISA string parsing, including making them case-insensitive - Support for the vector extension - Support for independent irq/softirq stacks - Our CPU DT binding now has "unevaluatedProperties: false" * tag 'riscv-for-linus-6.5-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (78 commits) riscv: hibernate: remove WARN_ON in save_processor_state dt-bindings: riscv: cpus: switch to unevaluatedProperties: false dt-bindings: riscv: cpus: add a ref the common cpu schema riscv: stack: Add config of thread stack size riscv: stack: Support HAVE_SOFTIRQ_ON_OWN_STACK riscv: stack: Support HAVE_IRQ_EXIT_ON_IRQ_STACK RISC-V: always report presence of extensions formerly part of the base ISA dt-bindings: riscv: explicitly mention assumption of Zicntr & Zihpm support RISC-V: remove decrement/increment dance in ISA string parser RISC-V: rework comments in ISA string parser RISC-V: validate riscv,isa at boot, not during ISA string parsing RISC-V: split early & late of_node to hartid mapping RISC-V: simplify register width check in ISA string parsing perf: RISC-V: Limit the number of counters returned from SBI riscv: replace deprecated scall with ecall riscv: uprobes: Restore thread.bad_cause riscv: mm: try VMA lock-based page fault handling first riscv: mm: Pre-allocate PGD entries for vmalloc/modules area RISC-V: hwprobe: Expose Zba, Zbb, and Zbs RISC-V: Track ISA extensions per hart ...
Diffstat (limited to 'drivers/clocksource')
-rw-r--r--drivers/clocksource/timer-riscv.c92
1 files changed, 51 insertions, 41 deletions
diff --git a/drivers/clocksource/timer-riscv.c b/drivers/clocksource/timer-riscv.c
index 5f0f10c7e222..da3071b387eb 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>
@@ -124,61 +125,28 @@ static irqreturn_t riscv_timer_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}
-static int __init riscv_timer_init_dt(struct device_node *n)
+static int __init riscv_timer_init_common(void)
{
- int cpuid, error;
- unsigned long hartid;
- struct device_node *child;
+ int error;
struct irq_domain *domain;
+ struct fwnode_handle *intc_fwnode = riscv_get_intc_hwnode();
- error = riscv_of_processor_hartid(n, &hartid);
- if (error < 0) {
- pr_warn("Not valid hartid for node [%pOF] error = [%lu]\n",
- n, hartid);
- return error;
- }
-
- cpuid = riscv_hartid_to_cpuid(hartid);
- if (cpuid < 0) {
- pr_warn("Invalid cpuid for hartid [%lu]\n", hartid);
- return cpuid;
- }
-
- if (cpuid != smp_processor_id())
- return 0;
-
- child = of_find_compatible_node(NULL, NULL, "riscv,timer");
- if (child) {
- riscv_timer_cannot_wake_cpu = of_property_read_bool(child,
- "riscv,timer-cannot-wake-cpu");
- of_node_put(child);
- }
-
- domain = NULL;
- child = of_get_compatible_child(n, "riscv,cpu-intc");
- if (!child) {
- pr_err("Failed to find INTC node [%pOF]\n", n);
- return -ENODEV;
- }
- domain = irq_find_host(child);
- of_node_put(child);
+ domain = irq_find_matching_fwnode(intc_fwnode, DOMAIN_BUS_ANY);
if (!domain) {
- pr_err("Failed to find IRQ domain for node [%pOF]\n", n);
+ pr_err("Failed to find irq_domain for INTC node [%pfwP]\n",
+ intc_fwnode);
return -ENODEV;
}
riscv_clock_event_irq = irq_create_mapping(domain, RV_IRQ_TIMER);
if (!riscv_clock_event_irq) {
- pr_err("Failed to map timer interrupt for node [%pOF]\n", n);
+ pr_err("Failed to map timer interrupt for node [%pfwP]\n", intc_fwnode);
return -ENODEV;
}
- pr_info("%s: Registering clocksource cpuid [%d] hartid [%lu]\n",
- __func__, cpuid, hartid);
error = clocksource_register_hz(&riscv_clocksource, riscv_timebase);
if (error) {
- pr_err("RISCV timer register failed [%d] for cpu = [%d]\n",
- error, cpuid);
+ pr_err("RISCV timer registration failed [%d]\n", error);
return error;
}
@@ -207,4 +175,46 @@ static int __init riscv_timer_init_dt(struct device_node *n)
return error;
}
+static int __init riscv_timer_init_dt(struct device_node *n)
+{
+ int cpuid, error;
+ unsigned long hartid;
+ struct device_node *child;
+
+ error = riscv_of_processor_hartid(n, &hartid);
+ if (error < 0) {
+ pr_warn("Invalid hartid for node [%pOF] error = [%lu]\n",
+ n, hartid);
+ return error;
+ }
+
+ cpuid = riscv_hartid_to_cpuid(hartid);
+ if (cpuid < 0) {
+ pr_warn("Invalid cpuid for hartid [%lu]\n", hartid);
+ return cpuid;
+ }
+
+ if (cpuid != smp_processor_id())
+ return 0;
+
+ child = of_find_compatible_node(NULL, NULL, "riscv,timer");
+ if (child) {
+ riscv_timer_cannot_wake_cpu = of_property_read_bool(child,
+ "riscv,timer-cannot-wake-cpu");
+ of_node_put(child);
+ }
+
+ return riscv_timer_init_common();
+}
+
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