linux-imx

/*

 * Copyright (C) Maxime Coquelin 2015

 * Author:  Maxime Coquelin <mcoquelin.stm32@gmail.com>

 * License terms:  GNU General Public License (GPL), version 2

 *

 * Inspired by time-efm32.c from Uwe Kleine-Koenig

 */

​

#include <linux/kernel.h>

#include <linux/clocksource.h>

#include <linux/clockchips.h>

#include <linux/delay.h>

#include <linux/irq.h>

#include <linux/interrupt.h>

#include <linux/of.h>

#include <linux/of_address.h>

#include <linux/of_irq.h>

#include <linux/clk.h>

#include <linux/reset.h>

#include <linux/sched_clock.h>

#include <linux/slab.h>

​

#include "timer-of.h"

​

#define TIM_CR1     0x00

#define TIM_DIER    0x0c

#define TIM_SR      0x10

#define TIM_EGR     0x14

#define TIM_CNT     0x24

#define TIM_PSC     0x28

#define TIM_ARR     0x2c

#define TIM_CCR1    0x34

​

#define TIM_CR1_CEN BIT(0)

#define TIM_CR1_UDIS    BIT(1)

#define TIM_CR1_OPM BIT(3)

#define TIM_CR1_ARPE    BIT(7)

​

#define TIM_DIER_UIE    BIT(0)

#define TIM_DIER_CC1IE  BIT(1)

​

#define TIM_SR_UIF  BIT(0)

​

#define TIM_EGR_UG  BIT(0)

​

#define TIM_PSC_MAX USHRT_MAX

#define TIM_PSC_CLKRATE 10000

​

struct stm32_timer_private {

    int bits;

};

​

/**

 * stm32_timer_of_bits_set - set accessor helper

 * @to: a timer_of structure pointer

 * @bits: the number of bits (16 or 32)

 *

 * Accessor helper to set the number of bits in the timer-of private

 * structure.

 *

 */

static void stm32_timer_of_bits_set(struct timer_of *to, int bits)

{