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/*
* Copyright (c) 2016 Google, Inc
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _ASM_ARCH_TIMER_H
#define _ASM_ARCH_TIMER_H
/* Each timer has 4 control bits in ctrl1 register.
* Timer1 uses bits 0:3, Timer2 uses bits 4:7 and so on,
* such that timer X uses bits (4 * X - 4):(4 * X - 1)
* If the timer does not support PWM, bit 4 is reserved.
*/
#define AST_TMC_EN (1 << 0)
#define AST_TMC_1MHZ (1 << 1)
#define AST_TMC_OVFINTR (1 << 2)
#define AST_TMC_PWM (1 << 3)
/* Timers are counted from 1 in the datasheet. */
#define AST_TMC_CTRL1_SHIFT(n) (4 * ((n) - 1))
#define AST_TMC_RATE (1000*1000)
#ifndef __ASSEMBLY__
/*
* All timers share control registers, which makes it harder to make them
* separate devices. Since only one timer is needed at the moment, making
* it this just one device.
*/
struct ast_timer_counter {
u32 status;
u32 reload_val;
u32 match1;
u32 match2;
};
struct ast_timer {
struct ast_timer_counter timers1[3];
u32 ctrl1;
u32 ctrl2;
#ifdef CONFIG_ASPEED_AST2500
u32 ctrl3;
u32 ctrl1_clr;
#else
u32 reserved[2];
#endif
struct ast_timer_counter timers2[5];
};
#endif /* __ASSEMBLY__ */
#endif /* _ASM_ARCH_TIMER_H */
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