diff options
Diffstat (limited to 'arch/arm/mach-zynq/timer.c')
-rw-r--r-- | arch/arm/mach-zynq/timer.c | 113 |
1 files changed, 0 insertions, 113 deletions
diff --git a/arch/arm/mach-zynq/timer.c b/arch/arm/mach-zynq/timer.c deleted file mode 100644 index a51822a..0000000 --- a/arch/arm/mach-zynq/timer.c +++ /dev/null @@ -1,113 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * Copyright (C) 2017 Weidmüller Interface GmbH & Co. KG - * Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com> - * - * Copyright (C) 2012 Michal Simek <monstr@monstr.eu> - * Copyright (C) 2011-2017 Xilinx, Inc. All rights reserved. - * - * (C) Copyright 2008 - * Guennadi Liakhovetki, DENX Software Engineering, <lg@denx.de> - * - * (C) Copyright 2004 - * Philippe Robin, ARM Ltd. <philippe.robin@arm.com> - * - * (C) Copyright 2002-2004 - * Gary Jennejohn, DENX Software Engineering, <gj@denx.de> - * - * (C) Copyright 2003 - * Texas Instruments <www.ti.com> - * - * (C) Copyright 2002 - * Sysgo Real-Time Solutions, GmbH <www.elinos.com> - * Marius Groeger <mgroeger@sysgo.de> - * - * (C) Copyright 2002 - * Sysgo Real-Time Solutions, GmbH <www.elinos.com> - * Alex Zuepke <azu@sysgo.de> - */ - -#include <clk.h> -#include <common.h> -#include <div64.h> -#include <dm.h> -#include <init.h> -#include <time.h> -#include <malloc.h> -#include <asm/global_data.h> -#include <asm/io.h> -#include <asm/arch/hardware.h> -#include <asm/arch/clk.h> - -DECLARE_GLOBAL_DATA_PTR; - -struct scu_timer { - u32 load; /* Timer Load Register */ - u32 counter; /* Timer Counter Register */ - u32 control; /* Timer Control Register */ -}; - -static struct scu_timer *timer_base = - (struct scu_timer *)ZYNQ_SCUTIMER_BASEADDR; - -#define SCUTIMER_CONTROL_PRESCALER_MASK 0x0000FF00 /* Prescaler */ -#define SCUTIMER_CONTROL_PRESCALER_SHIFT 8 -#define SCUTIMER_CONTROL_AUTO_RELOAD_MASK 0x00000002 /* Auto-reload */ -#define SCUTIMER_CONTROL_ENABLE_MASK 0x00000001 /* Timer enable */ - -#define TIMER_LOAD_VAL 0xFFFFFFFF -#define TIMER_PRESCALE 255 - -int timer_init(void) -{ - const u32 emask = SCUTIMER_CONTROL_AUTO_RELOAD_MASK | - (TIMER_PRESCALE << SCUTIMER_CONTROL_PRESCALER_SHIFT) | - SCUTIMER_CONTROL_ENABLE_MASK; - - struct udevice *dev; - struct clk clk; - int ret; - - ret = uclass_get_device_by_driver(UCLASS_CLK, - DM_DRIVER_GET(zynq_clk), &dev); - if (ret) - return ret; - - clk.id = cpu_6or4x_clk; - ret = clk_request(dev, &clk); - if (ret < 0) - return ret; - - gd->cpu_clk = clk_get_rate(&clk); - - clk_free(&clk); - - gd->arch.timer_rate_hz = (gd->cpu_clk / 2) / (TIMER_PRESCALE + 1); - - /* Load the timer counter register */ - writel(0xFFFFFFFF, &timer_base->load); - - /* - * Start the A9Timer device - * Enable Auto reload mode, Clear prescaler control bits - * Set prescaler value, Enable the decrementer - */ - clrsetbits_le32(&timer_base->control, SCUTIMER_CONTROL_PRESCALER_MASK, - emask); - - /* Reset time */ - gd->arch.lastinc = readl(&timer_base->counter) / - (gd->arch.timer_rate_hz / CONFIG_SYS_HZ); - gd->arch.tbl = 0; - - return 0; -} - -/* - * This function is derived from PowerPC code (timebase clock frequency). - * On ARM it returns the number of timer ticks per second. - */ -ulong get_tbclk(void) -{ - return gd->arch.timer_rate_hz; -} |