linux-imx

/*

 * EHRPWM PWM driver

 *

 * Copyright (C) 2012 Texas Instruments, Inc. - http://www.ti.com/

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 */

​

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/pwm.h>

#include <linux/io.h>

#include <linux/err.h>

#include <linux/clk.h>

#include <linux/pm_runtime.h>

#include <linux/of_device.h>

​

/* EHRPWM registers and bits definitions */

​

/* Time base module registers */

#define TBCTL           0x00

#define TBPRD           0x0A

​

#define TBCTL_PRDLD_MASK    BIT(3)

#define TBCTL_PRDLD_SHDW    0

#define TBCTL_PRDLD_IMDT    BIT(3)

#define TBCTL_CLKDIV_MASK   (BIT(12) | BIT(11) | BIT(10) | BIT(9) | \

                BIT(8) | BIT(7))

#define TBCTL_CTRMODE_MASK  (BIT(1) | BIT(0))

#define TBCTL_CTRMODE_UP    0

#define TBCTL_CTRMODE_DOWN  BIT(0)

#define TBCTL_CTRMODE_UPDOWN    BIT(1)

#define TBCTL_CTRMODE_FREEZE    (BIT(1) | BIT(0))

​

#define TBCTL_HSPCLKDIV_SHIFT   7

#define TBCTL_CLKDIV_SHIFT  10

​

#define CLKDIV_MAX      7

#define HSPCLKDIV_MAX       7

#define PERIOD_MAX      0xFFFF

​

/* compare module registers */

#define CMPA            0x12

#define CMPB            0x14

​

/* Action qualifier module registers */

#define AQCTLA          0x16

#define AQCTLB          0x18

#define AQSFRC          0x1A

#define AQCSFRC         0x1C

​