diff options
Diffstat (limited to 'kernel/arch/mips/xilfpga')
| -rw-r--r-- | kernel/arch/mips/xilfpga/Kconfig | 9 | ||||
| -rw-r--r-- | kernel/arch/mips/xilfpga/Makefile | 7 | ||||
| -rw-r--r-- | kernel/arch/mips/xilfpga/Platform | 3 | ||||
| -rw-r--r-- | kernel/arch/mips/xilfpga/init.c | 57 | ||||
| -rw-r--r-- | kernel/arch/mips/xilfpga/intc.c | 25 | ||||
| -rw-r--r-- | kernel/arch/mips/xilfpga/time.c | 41 |
6 files changed, 142 insertions, 0 deletions
diff --git a/kernel/arch/mips/xilfpga/Kconfig b/kernel/arch/mips/xilfpga/Kconfig new file mode 100644 index 000000000..42a030a0e --- /dev/null +++ b/kernel/arch/mips/xilfpga/Kconfig @@ -0,0 +1,9 @@ +choice + prompt "Machine type" + depends on MACH_XILFPGA + default XILFPGA_NEXYS4DDR + +config XILFPGA_NEXYS4DDR + bool "Nexys4DDR by Digilent" + +endchoice diff --git a/kernel/arch/mips/xilfpga/Makefile b/kernel/arch/mips/xilfpga/Makefile new file mode 100644 index 000000000..a4deec6fa --- /dev/null +++ b/kernel/arch/mips/xilfpga/Makefile @@ -0,0 +1,7 @@ +# +# Makefile for the Xilfpga +# + +obj-y += init.o +obj-y += intc.o +obj-y += time.o diff --git a/kernel/arch/mips/xilfpga/Platform b/kernel/arch/mips/xilfpga/Platform new file mode 100644 index 000000000..ed375afe3 --- /dev/null +++ b/kernel/arch/mips/xilfpga/Platform @@ -0,0 +1,3 @@ +platform-$(CONFIG_MACH_XILFPGA) += xilfpga/ +cflags-$(CONFIG_MACH_XILFPGA) += -I$(srctree)/arch/mips/include/asm/mach-xilfpga +load-$(CONFIG_MACH_XILFPGA) += 0xffffffff80100000 diff --git a/kernel/arch/mips/xilfpga/init.c b/kernel/arch/mips/xilfpga/init.c new file mode 100644 index 000000000..ce2aee216 --- /dev/null +++ b/kernel/arch/mips/xilfpga/init.c @@ -0,0 +1,57 @@ +/* + * Xilfpga platform setup + * + * Copyright (C) 2015 Imagination Technologies + * Author: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + */ + +#include <linux/of_fdt.h> +#include <linux/of_platform.h> + +#include <asm/prom.h> + +#define XILFPGA_UART_BASE 0xb0401000 + +const char *get_system_type(void) +{ + return "MIPSfpga"; +} + +void __init plat_mem_setup(void) +{ + __dt_setup_arch(__dtb_start); + strlcpy(arcs_cmdline, boot_command_line, COMMAND_LINE_SIZE); +} + +void __init prom_init(void) +{ + setup_8250_early_printk_port(XILFPGA_UART_BASE, 2, 50000); +} + +void __init prom_free_prom_memory(void) +{ +} + +void __init device_tree_init(void) +{ + if (!initial_boot_params) + return; + + unflatten_and_copy_device_tree(); +} + +static int __init plat_of_setup(void) +{ + if (!of_have_populated_dt()) + panic("Device tree not present"); + + if (of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL)) + panic("Failed to populate DT"); + + return 0; +} +arch_initcall(plat_of_setup); diff --git a/kernel/arch/mips/xilfpga/intc.c b/kernel/arch/mips/xilfpga/intc.c new file mode 100644 index 000000000..c4d1a716b --- /dev/null +++ b/kernel/arch/mips/xilfpga/intc.c @@ -0,0 +1,25 @@ +/* + * Xilfpga interrupt controller setup + * + * Copyright (C) 2015 Imagination Technologies + * Author: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + */ + +#include <linux/of.h> +#include <linux/of_irq.h> + +#include <asm/irq_cpu.h> + +static struct of_device_id of_irq_ids[] __initdata = { + { .compatible = "mti,cpu-interrupt-controller", .data = mips_cpu_irq_of_init }, + {}, +}; + +void __init arch_init_irq(void) +{ + of_irq_init(of_irq_ids); +} diff --git a/kernel/arch/mips/xilfpga/time.c b/kernel/arch/mips/xilfpga/time.c new file mode 100644 index 000000000..cbb3fca7b --- /dev/null +++ b/kernel/arch/mips/xilfpga/time.c @@ -0,0 +1,41 @@ +/* + * Xilfpga clocksource/timer setup + * + * Copyright (C) 2015 Imagination Technologies + * Author: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + */ + +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/clocksource.h> +#include <linux/of.h> + +#include <asm/time.h> + +void __init plat_time_init(void) +{ + struct device_node *np; + struct clk *clk; + + of_clk_init(NULL); + clocksource_probe(); + + np = of_get_cpu_node(0, NULL); + if (!np) { + pr_err("Failed to get CPU node\n"); + return; + } + + clk = of_clk_get(np, 0); + if (IS_ERR(clk)) { + pr_err("Failed to get CPU clock: %ld\n", PTR_ERR(clk)); + return; + } + + mips_hpt_frequency = clk_get_rate(clk) / 2; + clk_put(clk); +} |