Zubair Lutfullah Kakakhel | 9937f5f | 2015-10-26 11:30:56 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Xilfpga clocksource/timer setup |
| 3 | * |
| 4 | * Copyright (C) 2015 Imagination Technologies |
| 5 | * Author: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify it |
| 8 | * under the terms and conditions of the GNU General Public License, |
| 9 | * version 2, as published by the Free Software Foundation. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/clk.h> |
| 13 | #include <linux/clk-provider.h> |
| 14 | #include <linux/clocksource.h> |
| 15 | #include <linux/of.h> |
| 16 | |
| 17 | #include <asm/time.h> |
| 18 | |
| 19 | void __init plat_time_init(void) |
| 20 | { |
| 21 | struct device_node *np; |
| 22 | struct clk *clk; |
| 23 | |
| 24 | of_clk_init(NULL); |
| 25 | clocksource_of_init(); |
| 26 | |
| 27 | np = of_get_cpu_node(0, NULL); |
| 28 | if (!np) { |
| 29 | pr_err("Failed to get CPU node\n"); |
| 30 | return; |
| 31 | } |
| 32 | |
| 33 | clk = of_clk_get(np, 0); |
| 34 | if (IS_ERR(clk)) { |
| 35 | pr_err("Failed to get CPU clock: %ld\n", PTR_ERR(clk)); |
| 36 | return; |
| 37 | } |
| 38 | |
| 39 | mips_hpt_frequency = clk_get_rate(clk) / 2; |
| 40 | clk_put(clk); |
| 41 | } |