| /* |
| * Pistachio clocksource/timer setup |
| * |
| * Copyright (C) 2014 Google, Inc. |
| * |
| * 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/init.h> |
| #include <linux/irqchip/mips-gic.h> |
| #include <linux/of.h> |
| |
| #include <asm/time.h> |
| |
| unsigned int get_c0_compare_int(void) |
| { |
| return gic_get_c0_compare_int(); |
| } |
| |
| int get_c0_perfcount_int(void) |
| { |
| return gic_get_c0_perfcount_int(); |
| } |
| EXPORT_SYMBOL_GPL(get_c0_perfcount_int); |
| |
| void __init plat_time_init(void) |
| { |
| struct device_node *np; |
| struct clk *clk; |
| |
| of_clk_init(NULL); |
| clocksource_of_init(); |
| |
| 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); |
| } |