diff options
Diffstat (limited to 'arch/arm/mach-w90x900/time.c')
| -rw-r--r-- | arch/arm/mach-w90x900/time.c | 168 |
1 files changed, 0 insertions, 168 deletions
diff --git a/arch/arm/mach-w90x900/time.c b/arch/arm/mach-w90x900/time.c deleted file mode 100644 index dd20fab9a960..000000000000 --- a/arch/arm/mach-w90x900/time.c +++ /dev/null @@ -1,168 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * linux/arch/arm/mach-w90x900/time.c - * - * Based on linux/arch/arm/plat-s3c24xx/time.c by Ben Dooks - * - * Copyright (c) 2009 Nuvoton technology corporation - * All rights reserved. - * - * Wan ZongShun <mcuos.com@gmail.com> - */ - -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/err.h> -#include <linux/clk.h> -#include <linux/io.h> -#include <linux/leds.h> -#include <linux/clocksource.h> -#include <linux/clockchips.h> - -#include <asm/mach-types.h> -#include <asm/mach/irq.h> -#include <asm/mach/time.h> - -#include <mach/map.h> -#include "regs-timer.h" - -#include "nuc9xx.h" - -#define RESETINT 0x1f -#define PERIOD (0x01 << 27) -#define ONESHOT (0x00 << 27) -#define COUNTEN (0x01 << 30) -#define INTEN (0x01 << 29) - -#define TICKS_PER_SEC 100 -#define PRESCALE 0x63 /* Divider = prescale + 1 */ - -#define TDR_SHIFT 24 - -static unsigned int timer0_load; - -static int nuc900_clockevent_shutdown(struct clock_event_device *evt) -{ - unsigned int val = __raw_readl(REG_TCSR0) & ~(0x03 << 27); - - __raw_writel(val, REG_TCSR0); - return 0; -} - -static int nuc900_clockevent_set_oneshot(struct clock_event_device *evt) -{ - unsigned int val = __raw_readl(REG_TCSR0) & ~(0x03 << 27); - - val |= (ONESHOT | COUNTEN | INTEN | PRESCALE); - - __raw_writel(val, REG_TCSR0); - return 0; -} - -static int nuc900_clockevent_set_periodic(struct clock_event_device *evt) -{ - unsigned int val = __raw_readl(REG_TCSR0) & ~(0x03 << 27); - - __raw_writel(timer0_load, REG_TICR0); - val |= (PERIOD | COUNTEN | INTEN | PRESCALE); - __raw_writel(val, REG_TCSR0); - return 0; -} - -static int nuc900_clockevent_setnextevent(unsigned long evt, - struct clock_event_device *clk) -{ - unsigned int val; - - __raw_writel(evt, REG_TICR0); - - val = __raw_readl(REG_TCSR0); - val |= (COUNTEN | INTEN | PRESCALE); - __raw_writel(val, REG_TCSR0); - - return 0; -} - -static struct clock_event_device nuc900_clockevent_device = { - .name = "nuc900-timer0", - .features = CLOCK_EVT_FEAT_PERIODIC | - CLOCK_EVT_FEAT_ONESHOT, - .set_state_shutdown = nuc900_clockevent_shutdown, - .set_state_periodic = nuc900_clockevent_set_periodic, - .set_state_oneshot = nuc900_clockevent_set_oneshot, - .tick_resume = nuc900_clockevent_shutdown, - .set_next_event = nuc900_clockevent_setnextevent, - .rating = 300, -}; - -/*IRQ handler for the timer*/ - -static irqreturn_t nuc900_timer0_interrupt(int irq, void *dev_id) -{ - struct clock_event_device *evt = &nuc900_clockevent_device; - - __raw_writel(0x01, REG_TISR); /* clear TIF0 */ - - evt->event_handler(evt); - return IRQ_HANDLED; -} - -static struct irqaction nuc900_timer0_irq = { - .name = "nuc900-timer0", - .flags = IRQF_TIMER | IRQF_IRQPOLL, - .handler = nuc900_timer0_interrupt, -}; - -static void __init nuc900_clockevents_init(void) -{ - unsigned int rate; - struct clk *clk = clk_get(NULL, "timer0"); - - BUG_ON(IS_ERR(clk)); - - __raw_writel(0x00, REG_TCSR0); - - clk_enable(clk); - rate = clk_get_rate(clk) / (PRESCALE + 1); - - timer0_load = (rate / TICKS_PER_SEC); - - __raw_writel(RESETINT, REG_TISR); - setup_irq(IRQ_TIMER0, &nuc900_timer0_irq); - - nuc900_clockevent_device.cpumask = cpumask_of(0); - - clockevents_config_and_register(&nuc900_clockevent_device, rate, - 0xf, 0xffffffff); -} - -static void __init nuc900_clocksource_init(void) -{ - unsigned int val; - unsigned int rate; - struct clk *clk = clk_get(NULL, "timer1"); - - BUG_ON(IS_ERR(clk)); - - __raw_writel(0x00, REG_TCSR1); - - clk_enable(clk); - rate = clk_get_rate(clk) / (PRESCALE + 1); - - __raw_writel(0xffffffff, REG_TICR1); - - val = __raw_readl(REG_TCSR1); - val |= (COUNTEN | PERIOD | PRESCALE); - __raw_writel(val, REG_TCSR1); - - clocksource_mmio_init(REG_TDR1, "nuc900-timer1", rate, 200, - TDR_SHIFT, clocksource_mmio_readl_down); -} - -void __init nuc900_timer_init(void) -{ - nuc900_clocksource_init(); - nuc900_clockevents_init(); -} |