xref: /openbmc/u-boot/drivers/clk/at91/clk-slow.c (revision 747778cf) 
1 /*
2  * Copyright (C) 2016 Atmel Corporation
3  *               Wenyou.Yang <wenyou.yang@atmel.com>
4  *
5  * SPDX-License-Identifier:	GPL-2.0+
6  */
7 
8 #include <common.h>
9 #include <clk-uclass.h>
10 #include <dm/device.h>
11 
12 static int at91_slow_clk_enable(struct clk *clk)
13 {
14 	return 0;
15 }
16 
17 static ulong at91_slow_clk_get_rate(struct clk *clk)
18 {
19 	return CONFIG_SYS_AT91_SLOW_CLOCK;
20 }
21 
22 static struct clk_ops at91_slow_clk_ops = {
23 	.enable = at91_slow_clk_enable,
24 	.get_rate = at91_slow_clk_get_rate,
25 };
26 
27 static const struct udevice_id at91_slow_clk_match[] = {
28 	{ .compatible = "atmel,at91sam9x5-clk-slow" },
29 	{}
30 };
31 
32 U_BOOT_DRIVER(at91_slow_clk) = {
33 	.name = "at91-slow-clk",
34 	.id = UCLASS_CLK,
35 	.of_match = at91_slow_clk_match,
36 	.ops = &at91_slow_clk_ops,
37 };
38