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https://github.com/edk2-porting/linux-next.git
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e932900a32
Use cdns,ttc because this driver is Cadence Rev06 Triple Timer Counter and everybody can use it without xilinx specific function name or probing. Also use standard dt description for timer and also prepare for moving to clocksource initialization. Signed-off-by: Michal Simek <michal.simek@xilinx.com>
106 lines
2.6 KiB
C
106 lines
2.6 KiB
C
/*
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* This file contains common code that is intended to be used across
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* boards so that it's not replicated.
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*
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* Copyright (C) 2011 Xilinx
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/cpumask.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <linux/clk/zynq.h>
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#include <linux/clocksource.h>
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#include <linux/of_address.h>
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#include <linux/of_irq.h>
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#include <linux/of_platform.h>
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#include <linux/of.h>
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#include <linux/irqchip.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <asm/mach/time.h>
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#include <asm/mach-types.h>
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#include <asm/page.h>
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#include <asm/pgtable.h>
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#include <asm/hardware/cache-l2x0.h>
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#include "common.h"
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static struct of_device_id zynq_of_bus_ids[] __initdata = {
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{ .compatible = "simple-bus", },
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{}
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};
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/**
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* xilinx_init_machine() - System specific initialization, intended to be
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* called from board specific initialization.
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*/
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static void __init xilinx_init_machine(void)
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{
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/*
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* 64KB way size, 8-way associativity, parity disabled
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*/
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l2x0_of_init(0x02060000, 0xF0F0FFFF);
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of_platform_bus_probe(NULL, zynq_of_bus_ids, NULL);
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}
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#define SCU_PERIPH_PHYS 0xF8F00000
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#define SCU_PERIPH_SIZE SZ_8K
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#define SCU_PERIPH_VIRT (VMALLOC_END - SCU_PERIPH_SIZE)
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static struct map_desc scu_desc __initdata = {
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.virtual = SCU_PERIPH_VIRT,
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.pfn = __phys_to_pfn(SCU_PERIPH_PHYS),
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.length = SCU_PERIPH_SIZE,
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.type = MT_DEVICE,
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};
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static void __init xilinx_zynq_timer_init(void)
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{
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struct device_node *np;
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void __iomem *slcr;
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np = of_find_compatible_node(NULL, NULL, "xlnx,zynq-slcr");
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slcr = of_iomap(np, 0);
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WARN_ON(!slcr);
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xilinx_zynq_clocks_init(slcr);
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xttcps_timer_init();
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}
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/**
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* xilinx_map_io() - Create memory mappings needed for early I/O.
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*/
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static void __init xilinx_map_io(void)
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{
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debug_ll_io_init();
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iotable_init(&scu_desc, 1);
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}
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static const char *xilinx_dt_match[] = {
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"xlnx,zynq-zc702",
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"xlnx,zynq-7000",
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NULL
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};
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MACHINE_START(XILINX_EP107, "Xilinx Zynq Platform")
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.map_io = xilinx_map_io,
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.init_irq = irqchip_init,
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.init_machine = xilinx_init_machine,
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.init_time = xilinx_zynq_timer_init,
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.dt_compat = xilinx_dt_match,
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MACHINE_END
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