// SPDX-License-Identifier: GPL-2.0-only /* * Driver for Allwinner sun4i Pulse Width Modulation Controller * * Copyright (C) 2014 Alexandre Belloni <[email protected]> * * Limitations: * - When outputing the source clock directly, the PWM logic will be bypassed * and the currently running period is not guaranteed to be completed */ #include <linux/bitops.h> #include <linux/clk.h> #include <linux/delay.h> #include <linux/err.h> #include <linux/io.h> #include <linux/jiffies.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/pwm.h> #include <linux/reset.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/time.h> #define PWM_CTRL_REG … #define PWM_CH_PRD_BASE … #define PWM_CH_PRD_OFFSET … #define PWM_CH_PRD(ch) … #define PWMCH_OFFSET … #define PWM_PRESCAL_MASK … #define PWM_PRESCAL_OFF … #define PWM_EN … #define PWM_ACT_STATE … #define PWM_CLK_GATING … #define PWM_MODE … #define PWM_PULSE … #define PWM_BYPASS … #define PWM_RDY_BASE … #define PWM_RDY_OFFSET … #define PWM_RDY(ch) … #define PWM_PRD(prd) … #define PWM_PRD_MASK … #define PWM_DTY_MASK … #define PWM_REG_PRD(reg) … #define PWM_REG_DTY(reg) … #define PWM_REG_PRESCAL(reg, chan) … #define BIT_CH(bit, chan) … static const u32 prescaler_table[] = …; struct sun4i_pwm_data { … }; struct sun4i_pwm_chip { … }; static inline struct sun4i_pwm_chip *to_sun4i_pwm_chip(struct pwm_chip *chip) { … } static inline u32 sun4i_pwm_readl(struct sun4i_pwm_chip *sun4ichip, unsigned long offset) { … } static inline void sun4i_pwm_writel(struct sun4i_pwm_chip *sun4ichip, u32 val, unsigned long offset) { … } static int sun4i_pwm_get_state(struct pwm_chip *chip, struct pwm_device *pwm, struct pwm_state *state) { … } static int sun4i_pwm_calculate(struct sun4i_pwm_chip *sun4ichip, const struct pwm_state *state, u32 *dty, u32 *prd, unsigned int *prsclr, bool *bypass) { … } static int sun4i_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, const struct pwm_state *state) { … } static const struct pwm_ops sun4i_pwm_ops = …; static const struct sun4i_pwm_data sun4i_pwm_dual_nobypass = …; static const struct sun4i_pwm_data sun4i_pwm_dual_bypass = …; static const struct sun4i_pwm_data sun4i_pwm_single_bypass = …; static const struct sun4i_pwm_data sun50i_a64_pwm_data = …; static const struct sun4i_pwm_data sun50i_h6_pwm_data = …; static const struct of_device_id sun4i_pwm_dt_ids[] = …; MODULE_DEVICE_TABLE(of, sun4i_pwm_dt_ids); static int sun4i_pwm_probe(struct platform_device *pdev) { … } static void sun4i_pwm_remove(struct platform_device *pdev) { … } static struct platform_driver sun4i_pwm_driver = …; module_platform_driver(…) …; MODULE_ALIAS(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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