1 /*
2 * Copyright (C) 2013 Pengutronix
3 * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
4 *
5 * This program is free software; you can redistribute it and/or modify it under
6 * the terms of the GNU General Public License version 2 as published by the
7 * Free Software Foundation.
8 */
9 #include <linux/clk.h>
10 #include <linux/io.h>
11 #include <linux/clk-provider.h>
12 #include <linux/of.h>
13 #include <linux/of_address.h>
14
15 #include <dt-bindings/clock/efm32-cmu.h>
16
17 #define CMU_HFPERCLKEN0 0x44
18
19 static struct clk *clk[37];
20 static struct clk_onecell_data clk_data = {
21 .clks = clk,
22 .clk_num = ARRAY_SIZE(clk),
23 };
24
efm32gg_cmu_init(struct device_node * np)25 static void __init efm32gg_cmu_init(struct device_node *np)
26 {
27 int i;
28 void __iomem *base;
29
30 for (i = 0; i < ARRAY_SIZE(clk); ++i)
31 clk[i] = ERR_PTR(-ENOENT);
32
33 base = of_iomap(np, 0);
34 if (!base) {
35 pr_warn("Failed to map address range for efm32gg,cmu node\n");
36 return;
37 }
38
39 clk[clk_HFXO] = clk_register_fixed_rate(NULL, "HFXO", NULL,
40 CLK_IS_ROOT, 48000000);
41
42 clk[clk_HFPERCLKUSART0] = clk_register_gate(NULL, "HFPERCLK.USART0",
43 "HFXO", 0, base + CMU_HFPERCLKEN0, 0, 0, NULL);
44 clk[clk_HFPERCLKUSART1] = clk_register_gate(NULL, "HFPERCLK.USART1",
45 "HFXO", 0, base + CMU_HFPERCLKEN0, 1, 0, NULL);
46 clk[clk_HFPERCLKUSART2] = clk_register_gate(NULL, "HFPERCLK.USART2",
47 "HFXO", 0, base + CMU_HFPERCLKEN0, 2, 0, NULL);
48 clk[clk_HFPERCLKUART0] = clk_register_gate(NULL, "HFPERCLK.UART0",
49 "HFXO", 0, base + CMU_HFPERCLKEN0, 3, 0, NULL);
50 clk[clk_HFPERCLKUART1] = clk_register_gate(NULL, "HFPERCLK.UART1",
51 "HFXO", 0, base + CMU_HFPERCLKEN0, 4, 0, NULL);
52 clk[clk_HFPERCLKTIMER0] = clk_register_gate(NULL, "HFPERCLK.TIMER0",
53 "HFXO", 0, base + CMU_HFPERCLKEN0, 5, 0, NULL);
54 clk[clk_HFPERCLKTIMER1] = clk_register_gate(NULL, "HFPERCLK.TIMER1",
55 "HFXO", 0, base + CMU_HFPERCLKEN0, 6, 0, NULL);
56 clk[clk_HFPERCLKTIMER2] = clk_register_gate(NULL, "HFPERCLK.TIMER2",
57 "HFXO", 0, base + CMU_HFPERCLKEN0, 7, 0, NULL);
58 clk[clk_HFPERCLKTIMER3] = clk_register_gate(NULL, "HFPERCLK.TIMER3",
59 "HFXO", 0, base + CMU_HFPERCLKEN0, 8, 0, NULL);
60 clk[clk_HFPERCLKACMP0] = clk_register_gate(NULL, "HFPERCLK.ACMP0",
61 "HFXO", 0, base + CMU_HFPERCLKEN0, 9, 0, NULL);
62 clk[clk_HFPERCLKACMP1] = clk_register_gate(NULL, "HFPERCLK.ACMP1",
63 "HFXO", 0, base + CMU_HFPERCLKEN0, 10, 0, NULL);
64 clk[clk_HFPERCLKI2C0] = clk_register_gate(NULL, "HFPERCLK.I2C0",
65 "HFXO", 0, base + CMU_HFPERCLKEN0, 11, 0, NULL);
66 clk[clk_HFPERCLKI2C1] = clk_register_gate(NULL, "HFPERCLK.I2C1",
67 "HFXO", 0, base + CMU_HFPERCLKEN0, 12, 0, NULL);
68 clk[clk_HFPERCLKGPIO] = clk_register_gate(NULL, "HFPERCLK.GPIO",
69 "HFXO", 0, base + CMU_HFPERCLKEN0, 13, 0, NULL);
70 clk[clk_HFPERCLKVCMP] = clk_register_gate(NULL, "HFPERCLK.VCMP",
71 "HFXO", 0, base + CMU_HFPERCLKEN0, 14, 0, NULL);
72 clk[clk_HFPERCLKPRS] = clk_register_gate(NULL, "HFPERCLK.PRS",
73 "HFXO", 0, base + CMU_HFPERCLKEN0, 15, 0, NULL);
74 clk[clk_HFPERCLKADC0] = clk_register_gate(NULL, "HFPERCLK.ADC0",
75 "HFXO", 0, base + CMU_HFPERCLKEN0, 16, 0, NULL);
76 clk[clk_HFPERCLKDAC0] = clk_register_gate(NULL, "HFPERCLK.DAC0",
77 "HFXO", 0, base + CMU_HFPERCLKEN0, 17, 0, NULL);
78
79 of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
80 }
81 CLK_OF_DECLARE(efm32ggcmu, "efm32gg,cmu", efm32gg_cmu_init);
82