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Date: Sun, 21 Jan 2024 17:58:10 +0100 (CET)
From: Thomas Gleixner <tglx@...utronix.de>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, x86@...nel.org
Subject: [GIT pull] timers/core for v6.8-rc1
Linus,
please pull the latest timers/core branch from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers-core-2024-01-21
up to: 71fee48fb772: tick-sched: Fix idle and iowait sleeptime accounting vs CPU hotplug
Updates for time and clocksources:
- A fix for the idle and iowait time accounting vs. CPU hotplug.
The time is reset on CPU hotplug which makes the accumulated
systemwide time jump backwards.
- Assorted fixes and improvements for clocksource/event drivers
Thanks,
tglx
------------------>
Arnd Bergmann (1):
clocksource/drivers/ep93xx: Fix error handling during probe
Heiko Carstens (1):
tick-sched: Fix idle and iowait sleeptime accounting vs CPU hotplug
Inochi Amaoto (1):
dt-bindings: timer: thead,c900-aclint-mtimer: separate mtime and mtimecmp regs
Joshua Yeong (1):
clocksource/timer-riscv: Add riscv_clock_shutdown callback
Randy Dunlap (1):
clocksource/drivers/cadence-ttc: Fix some kernel-doc warnings
Sia Jee Heng (1):
dt-bindings: timer: Add StarFive JH8100 clint
Tony Lindgren (1):
clocksource/drivers/timer-ti-dm: Fix make W=n kerneldoc warnings
.../devicetree/bindings/timer/sifive,clint.yaml | 1 +
.../bindings/timer/thead,c900-aclint-mtimer.yaml | 9 ++++++++-
drivers/clocksource/timer-cadence-ttc.c | 22 ++++++++++++++++------
drivers/clocksource/timer-ep93xx.c | 5 ++---
drivers/clocksource/timer-riscv.c | 7 +++++++
drivers/clocksource/timer-ti-dm.c | 4 ++--
kernel/time/tick-sched.c | 5 +++++
7 files changed, 41 insertions(+), 12 deletions(-)
diff --git a/Documentation/devicetree/bindings/timer/sifive,clint.yaml b/Documentation/devicetree/bindings/timer/sifive,clint.yaml
index e8be6c470364..01254261e156 100644
--- a/Documentation/devicetree/bindings/timer/sifive,clint.yaml
+++ b/Documentation/devicetree/bindings/timer/sifive,clint.yaml
@@ -33,6 +33,7 @@ properties:
- sifive,fu540-c000-clint # SiFive FU540
- starfive,jh7100-clint # StarFive JH7100
- starfive,jh7110-clint # StarFive JH7110
+ - starfive,jh8100-clint # StarFive JH8100
- const: sifive,clint0 # SiFive CLINT v0 IP block
- items:
- enum:
diff --git a/Documentation/devicetree/bindings/timer/thead,c900-aclint-mtimeryaml b/Documentation/devicetree/bindings/timer/thead,c900-aclint-mtimer.yaml
index fbd235650e52..2e92bcdeb423 100644
--- a/Documentation/devicetree/bindings/timer/thead,c900-aclint-mtimer.yaml
+++ b/Documentation/devicetree/bindings/timer/thead,c900-aclint-mtimer.yaml
@@ -17,7 +17,12 @@ properties:
- const: thead,c900-aclint-mtimer
reg:
- maxItems: 1
+ items:
+ - description: MTIMECMP Registers
+
+ reg-names:
+ items:
+ - const: mtimecmp
interrupts-extended:
minItems: 1
@@ -28,6 +33,7 @@ additionalProperties: false
required:
- compatible
- reg
+ - reg-names
- interrupts-extended
examples:
@@ -39,5 +45,6 @@ examples:
<&cpu3intc 7>,
<&cpu4intc 7>;
reg = <0xac000000 0x00010000>;
+ reg-names = "mtimecmp";
};
...
diff --git a/drivers/clocksource/timer-cadence-ttc.c b/drivers/clocksource/timer-cadence-ttc.c
index 32daaac9b132..ca7a06489c40 100644
--- a/drivers/clocksource/timer-cadence-ttc.c
+++ b/drivers/clocksource/timer-cadence-ttc.c
@@ -69,7 +69,7 @@
* @base_addr: Base address of timer
* @freq: Timer input clock frequency
* @clk: Associated clock source
- * @clk_rate_change_nb Notifier block for clock rate changes
+ * @clk_rate_change_nb: Notifier block for clock rate changes
*/
struct ttc_timer {
void __iomem *base_addr;
@@ -134,7 +134,7 @@ static void ttc_set_interval(struct ttc_timer *timer,
* @irq: IRQ number of the Timer
* @dev_id: void pointer to the ttc_timer instance
*
- * returns: Always IRQ_HANDLED - success
+ * Returns: Always IRQ_HANDLED - success
**/
static irqreturn_t ttc_clock_event_interrupt(int irq, void *dev_id)
{
@@ -151,8 +151,9 @@ static irqreturn_t ttc_clock_event_interrupt(int irq, void *dev_id)
/**
* __ttc_clocksource_read - Reads the timer counter register
+ * @cs: &clocksource to read from
*
- * returns: Current timer counter register value
+ * Returns: Current timer counter register value
**/
static u64 __ttc_clocksource_read(struct clocksource *cs)
{
@@ -173,7 +174,7 @@ static u64 notrace ttc_sched_clock_read(void)
* @cycles: Timer interval ticks
* @evt: Address of clock event instance
*
- * returns: Always 0 - success
+ * Returns: Always %0 - success
**/
static int ttc_set_next_event(unsigned long cycles,
struct clock_event_device *evt)
@@ -186,9 +187,12 @@ static int ttc_set_next_event(unsigned long cycles,
}
/**
- * ttc_set_{shutdown|oneshot|periodic} - Sets the state of timer
- *
+ * ttc_shutdown - Sets the state of timer
* @evt: Address of clock event instance
+ *
+ * Used for shutdown or oneshot.
+ *
+ * Returns: Always %0 - success
**/
static int ttc_shutdown(struct clock_event_device *evt)
{
@@ -202,6 +206,12 @@ static int ttc_shutdown(struct clock_event_device *evt)
return 0;
}
+/**
+ * ttc_set_periodic - Sets the state of timer
+ * @evt: Address of clock event instance
+ *
+ * Returns: Always %0 - success
+ */
static int ttc_set_periodic(struct clock_event_device *evt)
{
struct ttc_timer_clockevent *ttce = to_ttc_timer_clkevent(evt);
diff --git a/drivers/clocksource/timer-ep93xx.c b/drivers/clocksource/timer-ep93xx.c
index bc0ca6e12334..6981ff3ac8a9 100644
--- a/drivers/clocksource/timer-ep93xx.c
+++ b/drivers/clocksource/timer-ep93xx.c
@@ -155,9 +155,8 @@ static int __init ep93xx_timer_of_init(struct device_node *np)
ep93xx_tcu = tcu;
irq = irq_of_parse_and_map(np, 0);
- if (irq == 0)
- irq = -EINVAL;
- if (irq < 0) {
+ if (!irq) {
+ ret = -EINVAL;
pr_err("EP93XX Timer Can't parse IRQ %d", irq);
goto out_free;
}
diff --git a/drivers/clocksource/timer-riscv.c b/drivers/clocksource/timer-riscv.c
index 57857c0dfba9..e66dcbd66566 100644
--- a/drivers/clocksource/timer-riscv.c
+++ b/drivers/clocksource/timer-riscv.c
@@ -61,12 +61,19 @@ static int riscv_clock_next_event(unsigned long delta,
return 0;
}
+static int riscv_clock_shutdown(struct clock_event_device *evt)
+{
+ riscv_clock_event_stop();
+ return 0;
+}
+
static unsigned int riscv_clock_event_irq;
static DEFINE_PER_CPU(struct clock_event_device, riscv_clock_event) = {
.name = "riscv_timer_clockevent",
.features = CLOCK_EVT_FEAT_ONESHOT,
.rating = 100,
.set_next_event = riscv_clock_next_event,
+ .set_state_shutdown = riscv_clock_shutdown,
};
/*
diff --git a/drivers/clocksource/timer-ti-dm.c b/drivers/clocksource/timer-ti-dm.c
index 5f60f6bd3386..56acf2617262 100644
--- a/drivers/clocksource/timer-ti-dm.c
+++ b/drivers/clocksource/timer-ti-dm.c
@@ -183,7 +183,7 @@ static inline u32 dmtimer_read(struct dmtimer *timer, u32 reg)
* dmtimer_write - write timer registers in posted and non-posted mode
* @timer: timer pointer over which write operation is to perform
* @reg: lowest byte holds the register offset
- * @value: data to write into the register
+ * @val: data to write into the register
*
* The posted mode bit is encoded in reg. Note that in posted mode, the write
* pending bit must be checked. Otherwise a write on a register which has a
@@ -949,7 +949,7 @@ static int omap_dm_timer_set_int_enable(struct omap_dm_timer *cookie,
/**
* omap_dm_timer_set_int_disable - disable timer interrupts
- * @timer: pointer to timer handle
+ * @cookie: pointer to timer cookie
* @mask: bit mask of interrupts to be disabled
*
* Disables the specified timer interrupts for a timer.
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index a17d26002831..d2501673028d 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -1576,13 +1576,18 @@ void tick_setup_sched_timer(void)
void tick_cancel_sched_timer(int cpu)
{
struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
+ ktime_t idle_sleeptime, iowait_sleeptime;
# ifdef CONFIG_HIGH_RES_TIMERS
if (ts->sched_timer.base)
hrtimer_cancel(&ts->sched_timer);
# endif
+ idle_sleeptime = ts->idle_sleeptime;
+ iowait_sleeptime = ts->iowait_sleeptime;
memset(ts, 0, sizeof(*ts));
+ ts->idle_sleeptime = idle_sleeptime;
+ ts->iowait_sleeptime = iowait_sleeptime;
}
#endif
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