/* * ST Microelectronics SPEAr Pulse Width Modulator driver * * Copyright (C) 2012 ST Microelectronics * Shiraz Hashim <[email protected]> * * 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/clk.h> #include <linux/err.h> #include <linux/io.h> #include <linux/ioport.h> #include <linux/kernel.h> #include <linux/math64.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/pwm.h> #include <linux/slab.h> #include <linux/types.h> #define NUM_PWM … /* PWM registers and bits definitions */ #define PWMCR … #define PWMCR_PWM_ENABLE … #define PWMCR_PRESCALE_SHIFT … #define PWMCR_MIN_PRESCALE … #define PWMCR_MAX_PRESCALE … #define PWMDCR … #define PWMDCR_MIN_DUTY … #define PWMDCR_MAX_DUTY … #define PWMPCR … #define PWMPCR_MIN_PERIOD … #define PWMPCR_MAX_PERIOD … /* Following only available on 13xx SoCs */ #define PWMMCR … #define PWMMCR_PWM_ENABLE … /** * struct spear_pwm_chip - struct representing pwm chip * * @mmio_base: base address of pwm chip * @clk: pointer to clk structure of pwm chip */ struct spear_pwm_chip { … }; static inline struct spear_pwm_chip *to_spear_pwm_chip(struct pwm_chip *chip) { … } static inline u32 spear_pwm_readl(struct spear_pwm_chip *chip, unsigned int num, unsigned long offset) { … } static inline void spear_pwm_writel(struct spear_pwm_chip *chip, unsigned int num, unsigned long offset, unsigned long val) { … } static int spear_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, u64 duty_ns, u64 period_ns) { … } static int spear_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm) { … } static void spear_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm) { … } static int spear_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, const struct pwm_state *state) { … } static const struct pwm_ops spear_pwm_ops = …; static int spear_pwm_probe(struct platform_device *pdev) { … } static const struct of_device_id spear_pwm_of_match[] = …; MODULE_DEVICE_TABLE(of, spear_pwm_of_match); static struct platform_driver spear_pwm_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_ALIAS(…) …;
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