linux/include/clocksource/timer-xilinx.h

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * Copyright (C) 2021 Sean Anderson <[email protected]>
 */

#ifndef XILINX_TIMER_H
#define XILINX_TIMER_H

#include <linux/compiler.h>

#define TCSR0 …
#define TLR0 …
#define TCR0 …
#define TCSR1 …
#define TLR1 …
#define TCR1 …

#define TCSR_MDT …
#define TCSR_UDT …
#define TCSR_GENT …
#define TCSR_CAPT …
#define TCSR_ARHT …
#define TCSR_LOAD …
#define TCSR_ENIT …
#define TCSR_ENT …
#define TCSR_TINT …
#define TCSR_PWMA …
#define TCSR_ENALL …
#define TCSR_CASC …

struct clk;
struct device_node;
struct regmap;

/**
 * struct xilinx_timer_priv - Private data for Xilinx AXI timer drivers
 * @map: Regmap of the device, possibly with an offset
 * @clk: Parent clock
 * @max: Maximum value of the counters
 */
struct xilinx_timer_priv { … };

/**
 * xilinx_timer_tlr_cycles() - Calculate the TLR for a period specified
 *                             in clock cycles
 * @priv: The timer's private data
 * @tcsr: The value of the TCSR register for this counter
 * @cycles: The number of cycles in this period
 *
 * Callers of this function MUST ensure that @cycles is representable as
 * a TLR.
 *
 * Return: The calculated value for TLR
 */
u32 xilinx_timer_tlr_cycles(struct xilinx_timer_priv *priv, u32 tcsr,
			    u64 cycles);

/**
 * xilinx_timer_get_period() - Get the current period of a counter
 * @priv: The timer's private data
 * @tlr: The value of TLR for this counter
 * @tcsr: The value of TCSR for this counter
 *
 * Return: The period, in ns
 */
unsigned int xilinx_timer_get_period(struct xilinx_timer_priv *priv,
				     u32 tlr, u32 tcsr);

#endif /* XILINX_TIMER_H */