// SPDX-License-Identifier: GPL-2.0 /* * Ingenic XBurst SoCs SYSOST clocks driver * Copyright (c) 2020 周琰杰 (Zhou Yanjie) <[email protected]> */ #include <linux/bitfield.h> #include <linux/bitops.h> #include <linux/clk.h> #include <linux/clk-provider.h> #include <linux/clockchips.h> #include <linux/clocksource.h> #include <linux/interrupt.h> #include <linux/mfd/syscon.h> #include <linux/of_address.h> #include <linux/of_irq.h> #include <linux/sched_clock.h> #include <linux/slab.h> #include <linux/syscore_ops.h> #include <dt-bindings/clock/ingenic,sysost.h> /* OST register offsets */ #define OST_REG_OSTCCR … #define OST_REG_OSTCR … #define OST_REG_OSTFR … #define OST_REG_OSTMR … #define OST_REG_OST1DFR … #define OST_REG_OST1CNT … #define OST_REG_OST2CNTL … #define OST_REG_OSTCNT2HBUF … #define OST_REG_OSTESR … #define OST_REG_OSTECR … /* bits within the OSTCCR register */ #define OSTCCR_PRESCALE1_MASK … #define OSTCCR_PRESCALE2_MASK … /* bits within the OSTCR register */ #define OSTCR_OST1CLR … #define OSTCR_OST2CLR … /* bits within the OSTFR register */ #define OSTFR_FFLAG … /* bits within the OSTMR register */ #define OSTMR_FMASK … /* bits within the OSTESR register */ #define OSTESR_OST1ENS … #define OSTESR_OST2ENS … /* bits within the OSTECR register */ #define OSTECR_OST1ENC … #define OSTECR_OST2ENC … struct ingenic_soc_info { … }; struct ingenic_ost_clk_info { … }; struct ingenic_ost_clk { … }; struct ingenic_ost { … }; static struct ingenic_ost *ingenic_ost; static inline struct ingenic_ost_clk *to_ost_clk(struct clk_hw *hw) { … } static unsigned long ingenic_ost_percpu_timer_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) { … } static unsigned long ingenic_ost_global_timer_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) { … } static u8 ingenic_ost_get_prescale(unsigned long rate, unsigned long req_rate) { … } static long ingenic_ost_round_rate(struct clk_hw *hw, unsigned long req_rate, unsigned long *parent_rate) { … } static int ingenic_ost_percpu_timer_set_rate(struct clk_hw *hw, unsigned long req_rate, unsigned long parent_rate) { … } static int ingenic_ost_global_timer_set_rate(struct clk_hw *hw, unsigned long req_rate, unsigned long parent_rate) { … } static const struct clk_ops ingenic_ost_percpu_timer_ops = …; static const struct clk_ops ingenic_ost_global_timer_ops = …; static const char * const ingenic_ost_clk_parents[] = …; static const struct ingenic_ost_clk_info x1000_ost_clk_info[] = …; static u64 notrace ingenic_ost_global_timer_read_cntl(void) { … } static u64 notrace ingenic_ost_clocksource_read(struct clocksource *cs) { … } static inline struct ingenic_ost *to_ingenic_ost(struct clock_event_device *evt) { … } static int ingenic_ost_cevt_set_state_shutdown(struct clock_event_device *evt) { … } static int ingenic_ost_cevt_set_next(unsigned long next, struct clock_event_device *evt) { … } static irqreturn_t ingenic_ost_cevt_cb(int irq, void *dev_id) { … } static int __init ingenic_ost_register_clock(struct ingenic_ost *ost, unsigned int idx, const struct ingenic_ost_clk_info *info, struct clk_hw_onecell_data *clocks) { … } static struct clk * __init ingenic_ost_get_clock(struct device_node *np, int id) { … } static int __init ingenic_ost_percpu_timer_init(struct device_node *np, struct ingenic_ost *ost) { … } static int __init ingenic_ost_global_timer_init(struct device_node *np, struct ingenic_ost *ost) { … } static const struct ingenic_soc_info x1000_soc_info = …; static const struct of_device_id __maybe_unused ingenic_ost_of_matches[] __initconst = …; static int __init ingenic_ost_probe(struct device_node *np) { … } static int __init ingenic_ost_init(struct device_node *np) { … } TIMER_OF_DECLARE(x1000_ost, "ingenic,x1000-ost", ingenic_ost_init);
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