Merge tag 'timers-core-2023-09-04-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull clocksource/clockevent driver updates from Thomas Gleixner:

 - Remove the OXNAS driver instead of adding a new one!

 - A set of boring fixes, cleanups and improvements

* tag 'timers-core-2023-09-04-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clocksource: Explicitly include correct DT includes
  clocksource/drivers/sun5i: Convert to platform device driver
  clocksource/drivers/sun5i: Remove pointless struct
  clocksource/drivers/sun5i: Remove duplication of code and data
  clocksource/drivers/loongson1: Set variable ls1x_timer_lock storage-class-specifier to static
  clocksource/drivers/arm_arch_timer: Disable timer before programming CVAL
  dt-bindings: timer: oxsemi,rps-timer: remove obsolete bindings
  clocksource/drivers/timer-oxnas-rps: Remove obsolete timer driver

Documentation/devicetree/bindings/timer/oxsemi,rps-timer.txt

-Oxford Semiconductor OXNAS SoCs Family RPS Timer
-================================================
-
-Required properties:
-- compatible: Should be "oxsemi,ox810se-rps-timer" or "oxsemi,ox820-rps-timer"
-- reg : Specifies base physical address and size of the registers.
-- interrupts : The interrupts of the two timers
-- clocks : The phandle of the timer clock source
-
-example:
-
-timer0: timer@200 {
-	compatible = "oxsemi,ox810se-rps-timer";
-	reg = <0x200 0x40>;
-	clocks = <&rpsclk>;
-	interrupts = <4 5>;
-};

drivers/clocksource/Kconfig

@@ -461,13 +461,6 @@ config VF_PIT_TIMER
 	help
 	  Support for Periodic Interrupt Timer on Freescale Vybrid Family SoCs.
 
-config OXNAS_RPS_TIMER
-	bool "Oxford Semiconductor OXNAS RPS Timers driver" if COMPILE_TEST
-	select TIMER_OF
-	select CLKSRC_MMIO
-	help
-	  This enables support for the Oxford Semiconductor OXNAS RPS timers.
-
 config SYS_SUPPORTS_SH_CMT
 	bool
 

drivers/clocksource/Makefile

@@ -54,7 +54,6 @@ obj-$(CONFIG_MTK_TIMER)		+= timer-mediatek.o
 obj-$(CONFIG_MTK_CPUX_TIMER)	+= timer-mediatek-cpux.o
 obj-$(CONFIG_CLKSRC_PISTACHIO)	+= timer-pistachio.o
 obj-$(CONFIG_CLKSRC_TI_32K)	+= timer-ti-32k.o
-obj-$(CONFIG_OXNAS_RPS_TIMER)	+= timer-oxnas-rps.o
 obj-$(CONFIG_OWL_TIMER)		+= timer-owl.o
 obj-$(CONFIG_MILBEAUT_TIMER)	+= timer-milbeaut.o
 obj-$(CONFIG_SPRD_TIMER)	+= timer-sprd.o

drivers/clocksource/arm_arch_timer.c

@@ -792,6 +792,13 @@ static __always_inline void set_next_event_mem(const int access, unsigned long e
 	u64 cnt;
 
 	ctrl = arch_timer_reg_read(access, ARCH_TIMER_REG_CTRL, clk);
+
+	/* Timer must be disabled before programming CVAL */
+	if (ctrl & ARCH_TIMER_CTRL_ENABLE) {
+		ctrl &= ~ARCH_TIMER_CTRL_ENABLE;
+		arch_timer_reg_write(access, ARCH_TIMER_REG_CTRL, ctrl, clk);
+	}
+
 	ctrl |= ARCH_TIMER_CTRL_ENABLE;
 	ctrl &= ~ARCH_TIMER_CTRL_IT_MASK;
 

drivers/clocksource/timer-loongson1-pwm.c

@@ -28,7 +28,7 @@
 
 #define CNTR_WIDTH		24
 
-DEFINE_RAW_SPINLOCK(ls1x_timer_lock);
+static DEFINE_RAW_SPINLOCK(ls1x_timer_lock);
 
 struct ls1x_clocksource {
 	void __iomem *reg_base;

drivers/clocksource/timer-oxnas-rps.c

-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * drivers/clocksource/timer-oxnas-rps.c
- *
- * Copyright (C) 2009 Oxford Semiconductor Ltd
- * Copyright (C) 2013 Ma Haijun <mahaijuns@gmail.com>
- * Copyright (C) 2016 Neil Armstrong <narmstrong@baylibre.com>
- */
-
-#define pr_fmt(fmt)	KBUILD_MODNAME ": " fmt
-
-#include <linux/init.h>
-#include <linux/irq.h>
-#include <linux/io.h>
-#include <linux/clk.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/of_irq.h>
-#include <linux/of_address.h>
-#include <linux/clockchips.h>
-#include <linux/sched_clock.h>
-
-/* TIMER1 used as tick
- * TIMER2 used as clocksource
- */
-
-/* Registers definitions */
-
-#define TIMER_LOAD_REG		0x0
-#define TIMER_CURR_REG		0x4
-#define TIMER_CTRL_REG		0x8
-#define TIMER_CLRINT_REG	0xC
-
-#define TIMER_BITS		24
-
-#define TIMER_MAX_VAL		(BIT(TIMER_BITS) - 1)
-
-#define TIMER_PERIODIC		BIT(6)
-#define TIMER_ENABLE		BIT(7)
-
-#define TIMER_DIV1		(0)
-#define TIMER_DIV16		(1 << 2)
-#define TIMER_DIV256		(2 << 2)
-
-#define TIMER1_REG_OFFSET	0
-#define TIMER2_REG_OFFSET	0x20
-
-/* Clockevent & Clocksource data */
-
-struct oxnas_rps_timer {
-	struct clock_event_device clkevent;
-	void __iomem *clksrc_base;
-	void __iomem *clkevt_base;
-	unsigned long timer_period;
-	unsigned int timer_prescaler;
-	struct clk *clk;
-	int irq;
-};
-
-static irqreturn_t oxnas_rps_timer_irq(int irq, void *dev_id)
-{
-	struct oxnas_rps_timer *rps = dev_id;
-
-	writel_relaxed(0, rps->clkevt_base + TIMER_CLRINT_REG);
-
-	rps->clkevent.event_handler(&rps->clkevent);
-
-	return IRQ_HANDLED;
-}
-
-static void oxnas_rps_timer_config(struct oxnas_rps_timer *rps,
-				   unsigned long period,
-				   unsigned int periodic)
-{
-	uint32_t cfg = rps->timer_prescaler;
-
-	if (period)
-		cfg |= TIMER_ENABLE;
-
-	if (periodic)
-		cfg |= TIMER_PERIODIC;
-
-	writel_relaxed(period, rps->clkevt_base + TIMER_LOAD_REG);
-	writel_relaxed(cfg, rps->clkevt_base + TIMER_CTRL_REG);
-}
-
-static int oxnas_rps_timer_shutdown(struct clock_event_device *evt)
-{
-	struct oxnas_rps_timer *rps =
-		container_of(evt, struct oxnas_rps_timer, clkevent);
-
-	oxnas_rps_timer_config(rps, 0, 0);
-
-	return 0;
-}
-
-static int oxnas_rps_timer_set_periodic(struct clock_event_device *evt)
-{
-	struct oxnas_rps_timer *rps =
-		container_of(evt, struct oxnas_rps_timer, clkevent);
-
-	oxnas_rps_timer_config(rps, rps->timer_period, 1);
-
-	return 0;
-}
-
-static int oxnas_rps_timer_set_oneshot(struct clock_event_device *evt)
-{
-	struct oxnas_rps_timer *rps =
-		container_of(evt, struct oxnas_rps_timer, clkevent);
-
-	oxnas_rps_timer_config(rps, rps->timer_period, 0);
-
-	return 0;
-}
-
-static int oxnas_rps_timer_next_event(unsigned long delta,
-				struct clock_event_device *evt)
-{
-	struct oxnas_rps_timer *rps =
-		container_of(evt, struct oxnas_rps_timer, clkevent);
-
-	oxnas_rps_timer_config(rps, delta, 0);
-
-	return 0;
-}
-
-static int __init oxnas_rps_clockevent_init(struct oxnas_rps_timer *rps)
-{
-	ulong clk_rate = clk_get_rate(rps->clk);
-	ulong timer_rate;
-
-	/* Start with prescaler 1 */
-	rps->timer_prescaler = TIMER_DIV1;
-	rps->timer_period = DIV_ROUND_UP(clk_rate, HZ);
-	timer_rate = clk_rate;
-
-	if (rps->timer_period > TIMER_MAX_VAL) {
-		rps->timer_prescaler = TIMER_DIV16;
-		timer_rate = clk_rate / 16;
-		rps->timer_period = DIV_ROUND_UP(timer_rate, HZ);
-	}
-	if (rps->timer_period > TIMER_MAX_VAL) {
-		rps->timer_prescaler = TIMER_DIV256;
-		timer_rate = clk_rate / 256;
-		rps->timer_period = DIV_ROUND_UP(timer_rate, HZ);
-	}
-
-	rps->clkevent.name = "oxnas-rps";
-	rps->clkevent.features = CLOCK_EVT_FEAT_PERIODIC |
-				 CLOCK_EVT_FEAT_ONESHOT |
-				 CLOCK_EVT_FEAT_DYNIRQ;
-	rps->clkevent.tick_resume = oxnas_rps_timer_shutdown;
-	rps->clkevent.set_state_shutdown = oxnas_rps_timer_shutdown;
-	rps->clkevent.set_state_periodic = oxnas_rps_timer_set_periodic;
-	rps->clkevent.set_state_oneshot = oxnas_rps_timer_set_oneshot;
-	rps->clkevent.set_next_event = oxnas_rps_timer_next_event;
-	rps->clkevent.rating = 200;
-	rps->clkevent.cpumask = cpu_possible_mask;
-	rps->clkevent.irq = rps->irq;
-	clockevents_config_and_register(&rps->clkevent,
-					timer_rate,
-					1,
-					TIMER_MAX_VAL);
-
-	pr_info("Registered clock event rate %luHz prescaler %x period %lu\n",
-			clk_rate,
-			rps->timer_prescaler,
-			rps->timer_period);
-
-	return 0;
-}
-
-/* Clocksource */
-
-static void __iomem *timer_sched_base;
-
-static u64 notrace oxnas_rps_read_sched_clock(void)
-{
-	return ~readl_relaxed(timer_sched_base);
-}
-
-static int __init oxnas_rps_clocksource_init(struct oxnas_rps_timer *rps)
-{
-	ulong clk_rate = clk_get_rate(rps->clk);
-	int ret;
-
-	/* use prescale 16 */
-	clk_rate = clk_rate / 16;
-
-	writel_relaxed(TIMER_MAX_VAL, rps->clksrc_base + TIMER_LOAD_REG);
-	writel_relaxed(TIMER_PERIODIC | TIMER_ENABLE | TIMER_DIV16,
-			rps->clksrc_base + TIMER_CTRL_REG);
-
-	timer_sched_base = rps->clksrc_base + TIMER_CURR_REG;
-	sched_clock_register(oxnas_rps_read_sched_clock,
-			     TIMER_BITS, clk_rate);
-	ret = clocksource_mmio_init(timer_sched_base,
-				    "oxnas_rps_clocksource_timer",
-				    clk_rate, 250, TIMER_BITS,
-				    clocksource_mmio_readl_down);
-	if (WARN_ON(ret)) {
-		pr_err("can't register clocksource\n");
-		return ret;
-	}
-
-	pr_info("Registered clocksource rate %luHz\n", clk_rate);
-
-	return 0;
-}
-
-static int __init oxnas_rps_timer_init(struct device_node *np)
-{
-	struct oxnas_rps_timer *rps;
-	void __iomem *base;
-	int ret;
-
-	rps = kzalloc(sizeof(*rps), GFP_KERNEL);
-	if (!rps)
-		return -ENOMEM;
-
-	rps->clk = of_clk_get(np, 0);
-	if (IS_ERR(rps->clk)) {
-		ret = PTR_ERR(rps->clk);
-		goto err_alloc;
-	}
-
-	ret = clk_prepare_enable(rps->clk);
-	if (ret)
-		goto err_clk;
-
-	base = of_iomap(np, 0);
-	if (!base) {
-		ret = -ENXIO;
-		goto err_clk_prepare;
-	}
-
-	rps->irq = irq_of_parse_and_map(np, 0);
-	if (!rps->irq) {
-		ret = -EINVAL;
-		goto err_iomap;
-	}
-
-	rps->clkevt_base = base + TIMER1_REG_OFFSET;
-	rps->clksrc_base = base + TIMER2_REG_OFFSET;
-
-	/* Disable timers */
-	writel_relaxed(0, rps->clkevt_base + TIMER_CTRL_REG);
-	writel_relaxed(0, rps->clksrc_base + TIMER_CTRL_REG);
-	writel_relaxed(0, rps->clkevt_base + TIMER_LOAD_REG);
-	writel_relaxed(0, rps->clksrc_base + TIMER_LOAD_REG);
-	writel_relaxed(0, rps->clkevt_base + TIMER_CLRINT_REG);
-	writel_relaxed(0, rps->clksrc_base + TIMER_CLRINT_REG);
-
-	ret = request_irq(rps->irq, oxnas_rps_timer_irq,
-			  IRQF_TIMER | IRQF_IRQPOLL,
-			  "rps-timer", rps);
-	if (ret)
-		goto err_iomap;
-
-	ret = oxnas_rps_clocksource_init(rps);
-	if (ret)
-		goto err_irqreq;
-
-	ret = oxnas_rps_clockevent_init(rps);
-	if (ret)
-		goto err_irqreq;
-
-	return 0;
-
-err_irqreq:
-	free_irq(rps->irq, rps);
-err_iomap:
-	iounmap(base);
-err_clk_prepare:
-	clk_disable_unprepare(rps->clk);
-err_clk:
-	clk_put(rps->clk);
-err_alloc:
-	kfree(rps);
-
-	return ret;
-}
-
-TIMER_OF_DECLARE(ox810se_rps,
-		       "oxsemi,ox810se-rps-timer", oxnas_rps_timer_init);
-TIMER_OF_DECLARE(ox820_rps,
-		       "oxsemi,ox820-rps-timer", oxnas_rps_timer_init);