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.h>
11 #include <linux/io.h>
12 #include <mach/at91_pmc.h>
13 #include "pmc.h"
14
15 DECLARE_GLOBAL_DATA_PTR;
16
plla_clk_enable(struct clk * clk)17 static int plla_clk_enable(struct clk *clk)
18 {
19 struct pmc_platdata *plat = dev_get_platdata(clk->dev);
20 struct at91_pmc *pmc = plat->reg_base;
21
22 if (readl(&pmc->sr) & AT91_PMC_LOCKA)
23 return 0;
24
25 return -EINVAL;
26 }
27
plla_clk_get_rate(struct clk * clk)28 static ulong plla_clk_get_rate(struct clk *clk)
29 {
30 return gd->arch.plla_rate_hz;
31 }
32
33 static struct clk_ops plla_clk_ops = {
34 .enable = plla_clk_enable,
35 .get_rate = plla_clk_get_rate,
36 };
37
plla_clk_probe(struct udevice * dev)38 static int plla_clk_probe(struct udevice *dev)
39 {
40 return at91_pmc_core_probe(dev);
41 }
42
43 static const struct udevice_id plla_clk_match[] = {
44 { .compatible = "atmel,sama5d3-clk-pll" },
45 {}
46 };
47
48 U_BOOT_DRIVER(at91_plla_clk) = {
49 .name = "at91-plla-clk",
50 .id = UCLASS_CLK,
51 .of_match = plla_clk_match,
52 .probe = plla_clk_probe,
53 .platdata_auto_alloc_size = sizeof(struct pmc_platdata),
54 .ops = &plla_clk_ops,
55 };
56