[PATCH 10/10] ARM: davinci: remove legacy timer support

Bartosz Golaszewski
2019-06-24T13:14:23Z

All platforms have now been switched to the new clocksource driver.
Remove the old code and various no longer needed bits and pieces.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: David Lechner <david@lechnology.com>
---
arch/arm/mach-davinci/Makefile | 3 +-
arch/arm/mach-davinci/devices-da8xx.c | 1 -
arch/arm/mach-davinci/devices.c | 19 -
arch/arm/mach-davinci/include/mach/common.h | 17 -
arch/arm/mach-davinci/include/mach/time.h | 33 --
arch/arm/mach-davinci/time.c | 400 --------------------
6 files changed, 1 insertion(+), 472 deletions(-)
delete mode 100644 arch/arm/mach-davinci/include/mach/time.h
delete mode 100644 arch/arm/mach-davinci/time.c

diff --git a/arch/arm/mach-davinci/Makefile b/arch/arm/mach-davinci/Makefile
index f76a8482784f..d9af8c0c0b87 100644
--- a/arch/arm/mach-davinci/Makefile
+++ b/arch/arm/mach-davinci/Makefile
@@ -5,8 +5,7 @@
#

# Common objects
-obj-y := time.o serial.o usb.o \
- common.o sram.o
+obj-y := serial.o usb.o common.o sram.o

obj-$(CONFIG_DAVINCI_MUX) += mux.o

diff --git a/arch/arm/mach-davinci/devices-da8xx.c b/arch/arm/mach-davinci/devices-da8xx.c
index 2d69e704f7f6..feb206bdf6e1 100644
--- a/arch/arm/mach-davinci/devices-da8xx.c
+++ b/arch/arm/mach-davinci/devices-da8xx.c
@@ -21,7 +21,6 @@
#include <mach/common.h>
#include <mach/cputype.h>
#include <mach/da8xx.h>
-#include <mach/time.h>

#include "asp.h"
#include "cpuidle.h"
diff --git a/arch/arm/mach-davinci/devices.c b/arch/arm/mach-davinci/devices.c
index 3e447d468845..d912d62a0eca 100644
--- a/arch/arm/mach-davinci/devices.c
+++ b/arch/arm/mach-davinci/devices.c
@@ -17,7 +17,6 @@
#include <mach/hardware.h>
#include <mach/cputype.h>
#include <mach/mux.h>
-#include <mach/time.h>

#include "davinci.h"
#include "irqs.h"
@@ -303,21 +302,3 @@ int davinci_gpio_register(struct resource *res, int size, void *pdata)
davinci_gpio_device.dev.platform_data = pdata;
return platform_device_register(&davinci_gpio_device);
}
-
-/*-------------------------------------------------------------------------*/
-
-/*-------------------------------------------------------------------------*/
-
-struct davinci_timer_instance davinci_timer_instance[2] = {
- {
- .base = DAVINCI_TIMER0_BASE,
- .bottom_irq = DAVINCI_INTC_IRQ(IRQ_TINT0_TINT12),
- .top_irq = DAVINCI_INTC_IRQ(IRQ_TINT0_TINT34),
- },
- {
- .base = DAVINCI_TIMER1_BASE,
- .bottom_irq = DAVINCI_INTC_IRQ(IRQ_TINT1_TINT12),
- .top_irq = DAVINCI_INTC_IRQ(IRQ_TINT1_TINT34),
- },
-};
-
diff --git a/arch/arm/mach-davinci/include/mach/common.h b/arch/arm/mach-davinci/include/mach/common.h
index 9526e5da0d33..139b83de011d 100644
--- a/arch/arm/mach-davinci/include/mach/common.h
+++ b/arch/arm/mach-davinci/include/mach/common.h
@@ -22,22 +22,6 @@
#define DAVINCI_INTC_START NR_IRQS
#define DAVINCI_INTC_IRQ(_irqnum) (DAVINCI_INTC_START + (_irqnum))

-void davinci_timer_init(struct clk *clk);
-
-struct davinci_timer_instance {
- u32 base;
- u32 bottom_irq;
- u32 top_irq;
- unsigned long cmp_off;
- unsigned int cmp_irq;
-};
-
-struct davinci_timer_info {
- struct davinci_timer_instance *timers;
- unsigned int clockevent_id;
- unsigned int clocksource_id;
-};
-
struct davinci_gpio_controller;

/*
@@ -58,7 +42,6 @@ struct davinci_soc_info {
u32 pinmux_base;
const struct mux_config *pinmux_pins;
unsigned long pinmux_pins_num;
- struct davinci_timer_info *timer_info;
int gpio_type;
u32 gpio_base;
unsigned gpio_num;
diff --git a/arch/arm/mach-davinci/include/mach/time.h b/arch/arm/mach-davinci/include/mach/time.h
deleted file mode 100644
index ba913736990f..000000000000
--- a/arch/arm/mach-davinci/include/mach/time.h
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
- * Local header file for DaVinci time code.
- *
- * Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com>
- *
- * 2007 (c) MontaVista Software, Inc. This file is licensed under
- * the terms of the GNU General Public License version 2. This program
- * is licensed "as is" without any warranty of any kind, whether express
- * or implied.
- */
-#ifndef __ARCH_ARM_MACH_DAVINCI_TIME_H
-#define __ARCH_ARM_MACH_DAVINCI_TIME_H
-
-#define DAVINCI_TIMER1_BASE (IO_PHYS + 0x21800)
-
-enum {
- T0_BOT,
- T0_TOP,
- T1_BOT,
- T1_TOP,
- NUM_TIMERS
-};
-
-#define IS_TIMER1(id) (id & 0x2)
-#define IS_TIMER0(id) (!IS_TIMER1(id))
-#define IS_TIMER_TOP(id) ((id & 0x1))
-#define IS_TIMER_BOT(id) (!IS_TIMER_TOP(id))
-
-#define ID_TO_TIMER(id) (IS_TIMER1(id) != 0)
-
-extern struct davinci_timer_instance davinci_timer_instance[];
-
-#endif /* __ARCH_ARM_MACH_DAVINCI_TIME_H */
diff --git a/arch/arm/mach-davinci/time.c b/arch/arm/mach-davinci/time.c
deleted file mode 100644
index 740410a3bb6a..000000000000
--- a/arch/arm/mach-davinci/time.c
+++ /dev/null
@@ -1,400 +0,0 @@
-/*
- * DaVinci timer subsystem
- *
- * Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com>
- *
- * 2007 (c) MontaVista Software, Inc. This file is licensed under
- * the terms of the GNU General Public License version 2. This program
- * is licensed "as is" without any warranty of any kind, whether express
- * or implied.
- */
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/interrupt.h>
-#include <linux/clocksource.h>
-#include <linux/clockchips.h>
-#include <linux/io.h>
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/of.h>
-#include <linux/platform_device.h>
-#include <linux/sched_clock.h>
-
-#include <asm/mach/irq.h>
-#include <asm/mach/time.h>
-
-#include <mach/cputype.h>
-#include <mach/hardware.h>
-#include <mach/time.h>
-
-static struct clock_event_device clockevent_davinci;
-static unsigned int davinci_clock_tick_rate;
-
-/*
- * This driver configures the 2 64-bit count-up timers as 4 independent
- * 32-bit count-up timers used as follows:
- */
-
-enum {
- TID_CLOCKEVENT,
- TID_CLOCKSOURCE,
-};
-
-/* Timer register offsets */
-#define PID12 0x0
-#define TIM12 0x10
-#define TIM34 0x14
-#define PRD12 0x18
-#define PRD34 0x1c
-#define TCR 0x20
-#define TGCR 0x24
-#define WDTCR 0x28
-
-/* Offsets of the 8 compare registers */
-#define CMP12_0 0x60
-#define CMP12_1 0x64
-#define CMP12_2 0x68
-#define CMP12_3 0x6c
-#define CMP12_4 0x70
-#define CMP12_5 0x74
-#define CMP12_6 0x78
-#define CMP12_7 0x7c
-
-/* Timer register bitfields */
-#define TCR_ENAMODE_DISABLE 0x0
-#define TCR_ENAMODE_ONESHOT 0x1
-#define TCR_ENAMODE_PERIODIC 0x2
-#define TCR_ENAMODE_MASK 0x3
-
-#define TGCR_TIMMODE_SHIFT 2
-#define TGCR_TIMMODE_64BIT_GP 0x0
-#define TGCR_TIMMODE_32BIT_UNCHAINED 0x1
-#define TGCR_TIMMODE_64BIT_WDOG 0x2
-#define TGCR_TIMMODE_32BIT_CHAINED 0x3
-
-#define TGCR_TIM12RS_SHIFT 0
-#define TGCR_TIM34RS_SHIFT 1
-#define TGCR_RESET 0x0
-#define TGCR_UNRESET 0x1
-#define TGCR_RESET_MASK 0x3
-
-struct timer_s {
- char *name;
- unsigned int id;
- unsigned long period;
- unsigned long opts;
- unsigned long flags;
- void __iomem *base;
- unsigned long tim_off;
- unsigned long prd_off;
- unsigned long enamode_shift;
- struct irqaction irqaction;
-};
-static struct timer_s timers[];
-
-/* values for 'opts' field of struct timer_s */
-#define TIMER_OPTS_DISABLED 0x01
-#define TIMER_OPTS_ONESHOT 0x02
-#define TIMER_OPTS_PERIODIC 0x04
-#define TIMER_OPTS_STATE_MASK 0x07
-
-#define TIMER_OPTS_USE_COMPARE 0x80000000
-#define USING_COMPARE(t) ((t)->opts & TIMER_OPTS_USE_COMPARE)
-
-static char *id_to_name[] = {
- [T0_BOT] = "timer0_0",
- [T0_TOP] = "timer0_1",
- [T1_BOT] = "timer1_0",
- [T1_TOP] = "timer1_1",
-};
-
-static int timer32_config(struct timer_s *t)
-{
- u32 tcr;
- struct davinci_soc_info *soc_info = &davinci_soc_info;
-
- if (USING_COMPARE(t)) {
- struct davinci_timer_instance *dtip =
- soc_info->timer_info->timers;
- int event_timer = ID_TO_TIMER(timers[TID_CLOCKEVENT].id);
-
- /*
- * Next interrupt should be the current time reg value plus
- * the new period (using 32-bit unsigned addition/wrapping
- * to 0 on overflow). This assumes that the clocksource
- * is setup to count to 2^32-1 before wrapping around to 0.
- */
- __raw_writel(__raw_readl(t->base + t->tim_off) + t->period,
- t->base + dtip[event_timer].cmp_off);
- } else {
- tcr = __raw_readl(t->base + TCR);
-
- /* disable timer */
- tcr &= ~(TCR_ENAMODE_MASK << t->enamode_shift);
- __raw_writel(tcr, t->base + TCR);
-
- /* reset counter to zero, set new period */
- __raw_writel(0, t->base + t->tim_off);
- __raw_writel(t->period, t->base + t->prd_off);
-
- /* Set enable mode */
- if (t->opts & TIMER_OPTS_ONESHOT)
- tcr |= TCR_ENAMODE_ONESHOT << t->enamode_shift;
- else if (t->opts & TIMER_OPTS_PERIODIC)
- tcr |= TCR_ENAMODE_PERIODIC << t->enamode_shift;
-
- __raw_writel(tcr, t->base + TCR);
- }
- return 0;
-}
-
-static inline u32 timer32_read(struct timer_s *t)
-{
- return __raw_readl(t->base + t->tim_off);
-}
-
-static irqreturn_t timer_interrupt(int irq, void *dev_id)
-{
- struct clock_event_device *evt = &clockevent_davinci;
-
- evt->event_handler(evt);
- return IRQ_HANDLED;
-}
-
-/* called when 32-bit counter wraps */
-static irqreturn_t freerun_interrupt(int irq, void *dev_id)
-{
- return IRQ_HANDLED;
-}
-
-static struct timer_s timers[] = {
- [TID_CLOCKEVENT] = {
- .name = "clockevent",
- .opts = TIMER_OPTS_DISABLED,
- .irqaction = {
- .flags = IRQF_TIMER,
- .handler = timer_interrupt,
- }
- },
- [TID_CLOCKSOURCE] = {
- .name = "free-run counter",
- .period = ~0,
- .opts = TIMER_OPTS_PERIODIC,
- .irqaction = {
- .flags = IRQF_TIMER,
- .handler = freerun_interrupt,
- }
- },
-};
-
-static void __init timer_init(void)
-{
- struct davinci_soc_info *soc_info = &davinci_soc_info;
- struct davinci_timer_instance *dtip = soc_info->timer_info->timers;
- void __iomem *base[2];
- int i;
-
- /* Global init of each 64-bit timer as a whole */
- for(i=0; i<2; i++) {
- u32 tgcr;
-
- base[i] = ioremap(dtip[i].base, SZ_4K);
- if (WARN_ON(!base[i]))
- continue;
-
- /* Disabled, Internal clock source */
- __raw_writel(0, base[i] + TCR);
-
- /* reset both timers, no pre-scaler for timer34 */
- tgcr = 0;
- __raw_writel(tgcr, base[i] + TGCR);
-
- /* Set both timers to unchained 32-bit */
- tgcr = TGCR_TIMMODE_32BIT_UNCHAINED << TGCR_TIMMODE_SHIFT;
- __raw_writel(tgcr, base[i] + TGCR);
-
- /* Unreset timers */
- tgcr |= (TGCR_UNRESET << TGCR_TIM12RS_SHIFT) |
- (TGCR_UNRESET << TGCR_TIM34RS_SHIFT);
- __raw_writel(tgcr, base[i] + TGCR);
-
- /* Init both counters to zero */
- __raw_writel(0, base[i] + TIM12);
- __raw_writel(0, base[i] + TIM34);
- }
-
- /* Init of each timer as a 32-bit timer */
- for (i=0; i< ARRAY_SIZE(timers); i++) {
- struct timer_s *t = &timers[i];
- int timer = ID_TO_TIMER(t->id);
- u32 irq;
-
- t->base = base[timer];
- if (!t->base)
- continue;
-
- if (IS_TIMER_BOT(t->id)) {
- t->enamode_shift = 6;
- t->tim_off = TIM12;
- t->prd_off = PRD12;
- irq = dtip[timer].bottom_irq;
- } else {
- t->enamode_shift = 22;
- t->tim_off = TIM34;
- t->prd_off = PRD34;
- irq = dtip[timer].top_irq;
- }
-
- /* Register interrupt */
- t->irqaction.name = t->name;
- t->irqaction.dev_id = (void *)t;
-
- if (t->irqaction.handler != NULL) {
- irq = USING_COMPARE(t) ? dtip[i].cmp_irq : irq;
- setup_irq(irq, &t->irqaction);
- }
- }
-}
-
-/*
- * clocksource
- */
-static u64 read_cycles(struct clocksource *cs)
-{
- struct timer_s *t = &timers[TID_CLOCKSOURCE];
-
- return (cycles_t)timer32_read(t);
-}
-
-static struct clocksource clocksource_davinci = {
- .rating = 300,
- .read = read_cycles,
- .mask = CLOCKSOURCE_MASK(32),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
-/*
- * Overwrite weak default sched_clock with something more precise
- */
-static u64 notrace davinci_read_sched_clock(void)
-{
- return timer32_read(&timers[TID_CLOCKSOURCE]);
-}
-
-/*
- * clockevent
- */
-static int davinci_set_next_event(unsigned long cycles,
- struct clock_event_device *evt)
-{
- struct timer_s *t = &timers[TID_CLOCKEVENT];
-
- t->period = cycles;
- timer32_config(t);
- return 0;
-}
-
-static int davinci_shutdown(struct clock_event_device *evt)
-{
- struct timer_s *t = &timers[TID_CLOCKEVENT];
-
- t->opts &= ~TIMER_OPTS_STATE_MASK;
- t->opts |= TIMER_OPTS_DISABLED;
- return 0;
-}
-
-static int davinci_set_oneshot(struct clock_event_device *evt)
-{
- struct timer_s *t = &timers[TID_CLOCKEVENT];
-
- t->opts &= ~TIMER_OPTS_STATE_MASK;
- t->opts |= TIMER_OPTS_ONESHOT;
- return 0;
-}
-
-static int davinci_set_periodic(struct clock_event_device *evt)
-{
- struct timer_s *t = &timers[TID_CLOCKEVENT];
-
- t->period = davinci_clock_tick_rate / (HZ);
- t->opts &= ~TIMER_OPTS_STATE_MASK;
- t->opts |= TIMER_OPTS_PERIODIC;
- timer32_config(t);
- return 0;
-}
-
-static struct clock_event_device clockevent_davinci = {
- .features = CLOCK_EVT_FEAT_PERIODIC |
- CLOCK_EVT_FEAT_ONESHOT,
- .set_next_event = davinci_set_next_event,
- .set_state_shutdown = davinci_shutdown,
- .set_state_periodic = davinci_set_periodic,
- .set_state_oneshot = davinci_set_oneshot,
-};
-
-void __init davinci_timer_init(struct clk *timer_clk)
-{
- struct davinci_soc_info *soc_info = &davinci_soc_info;
- unsigned int clockevent_id;
- unsigned int clocksource_id;
- int i;
-
- clockevent_id = soc_info->timer_info->clockevent_id;
- clocksource_id = soc_info->timer_info->clocksource_id;
-
- timers[TID_CLOCKEVENT].id = clockevent_id;
- timers[TID_CLOCKSOURCE].id = clocksource_id;
-
- /*
- * If using same timer for both clock events & clocksource,
- * a compare register must be used to generate an event interrupt.
- * This is equivalent to a oneshot timer only (not periodic).
- */
- if (clockevent_id == clocksource_id) {
- struct davinci_timer_instance *dtip =
- soc_info->timer_info->timers;
- int event_timer = ID_TO_TIMER(clockevent_id);
-
- /* Only bottom timers can use compare regs */
- if (IS_TIMER_TOP(clockevent_id))
- pr_warn("%s: Invalid use of system timers. Results unpredictable.\n",
- __func__);
- else if ((dtip[event_timer].cmp_off == 0)
- || (dtip[event_timer].cmp_irq == 0))
- pr_warn("%s: Invalid timer instance setup. Results unpredictable.\n",
- __func__);
- else {
- timers[TID_CLOCKEVENT].opts |= TIMER_OPTS_USE_COMPARE;
- clockevent_davinci.features = CLOCK_EVT_FEAT_ONESHOT;
- }
- }
-
- BUG_ON(IS_ERR(timer_clk));
- clk_prepare_enable(timer_clk);
-
- /* init timer hw */
- timer_init();
-
- davinci_clock_tick_rate = clk_get_rate(timer_clk);
-
- /* setup clocksource */
- clocksource_davinci.name = id_to_name[clocksource_id];
- if (clocksource_register_hz(&clocksource_davinci,
- davinci_clock_tick_rate))
- pr_err("%s: can't register clocksource!\n",
- clocksource_davinci.name);
-
- sched_clock_register(davinci_read_sched_clock, 32,
- davinci_clock_tick_rate);
-
- /* setup clockevent */
- clockevent_davinci.name = id_to_name[timers[TID_CLOCKEVENT].id];
-
- clockevent_davinci.cpumask = cpumask_of(0);
- clockevents_config_and_register(&clockevent_davinci,
- davinci_clock_tick_rate, 1, 0xfffffffe);
-
- for (i=0; i< ARRAY_SIZE(timers); i++)
- timer32_config(&timers[i]);
-}
--
2.21.0