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/io.h>
10 #include <linux/clk-provider.h>
11 #include <linux/of.h>
12 #include <linux/of_address.h>
13 #include <linux/slab.h>
14
15 #include <dt-bindings/clock/efm32-cmu.h>
16
17 #define CMU_HFPERCLKEN0 0x44
18 #define CMU_MAX_CLKS 37
19
20 static struct clk_hw_onecell_data *clk_data;
21
efm32gg_cmu_init(struct device_node * np)22 static void __init efm32gg_cmu_init(struct device_node *np)
23 {
24 int i;
25 void __iomem *base;
26 struct clk_hw **hws;
27
28 clk_data = kzalloc(struct_size(clk_data, hws, CMU_MAX_CLKS),
29 GFP_KERNEL);
30
31 if (!clk_data)
32 return;
33
34 hws = clk_data->hws;
35
36 for (i = 0; i < CMU_MAX_CLKS; ++i)
37 hws[i] = ERR_PTR(-ENOENT);
38
39 base = of_iomap(np, 0);
40 if (!base) {
41 pr_warn("Failed to map address range for efm32gg,cmu node\n");
42 return;
43 }
44
45 hws[clk_HFXO] = clk_hw_register_fixed_rate(NULL, "HFXO", NULL, 0,
46 48000000);
47
48 hws[clk_HFPERCLKUSART0] = clk_hw_register_gate(NULL, "HFPERCLK.USART0",
49 "HFXO", 0, base + CMU_HFPERCLKEN0, 0, 0, NULL);
50 hws[clk_HFPERCLKUSART1] = clk_hw_register_gate(NULL, "HFPERCLK.USART1",
51 "HFXO", 0, base + CMU_HFPERCLKEN0, 1, 0, NULL);
52 hws[clk_HFPERCLKUSART2] = clk_hw_register_gate(NULL, "HFPERCLK.USART2",
53 "HFXO", 0, base + CMU_HFPERCLKEN0, 2, 0, NULL);
54 hws[clk_HFPERCLKUART0] = clk_hw_register_gate(NULL, "HFPERCLK.UART0",
55 "HFXO", 0, base + CMU_HFPERCLKEN0, 3, 0, NULL);
56 hws[clk_HFPERCLKUART1] = clk_hw_register_gate(NULL, "HFPERCLK.UART1",
57 "HFXO", 0, base + CMU_HFPERCLKEN0, 4, 0, NULL);
58 hws[clk_HFPERCLKTIMER0] = clk_hw_register_gate(NULL, "HFPERCLK.TIMER0",
59 "HFXO", 0, base + CMU_HFPERCLKEN0, 5, 0, NULL);
60 hws[clk_HFPERCLKTIMER1] = clk_hw_register_gate(NULL, "HFPERCLK.TIMER1",
61 "HFXO", 0, base + CMU_HFPERCLKEN0, 6, 0, NULL);
62 hws[clk_HFPERCLKTIMER2] = clk_hw_register_gate(NULL, "HFPERCLK.TIMER2",
63 "HFXO", 0, base + CMU_HFPERCLKEN0, 7, 0, NULL);
64 hws[clk_HFPERCLKTIMER3] = clk_hw_register_gate(NULL, "HFPERCLK.TIMER3",
65 "HFXO", 0, base + CMU_HFPERCLKEN0, 8, 0, NULL);
66 hws[clk_HFPERCLKACMP0] = clk_hw_register_gate(NULL, "HFPERCLK.ACMP0",
67 "HFXO", 0, base + CMU_HFPERCLKEN0, 9, 0, NULL);
68 hws[clk_HFPERCLKACMP1] = clk_hw_register_gate(NULL, "HFPERCLK.ACMP1",
69 "HFXO", 0, base + CMU_HFPERCLKEN0, 10, 0, NULL);
70 hws[clk_HFPERCLKI2C0] = clk_hw_register_gate(NULL, "HFPERCLK.I2C0",
71 "HFXO", 0, base + CMU_HFPERCLKEN0, 11, 0, NULL);
72 hws[clk_HFPERCLKI2C1] = clk_hw_register_gate(NULL, "HFPERCLK.I2C1",
73 "HFXO", 0, base + CMU_HFPERCLKEN0, 12, 0, NULL);
74 hws[clk_HFPERCLKGPIO] = clk_hw_register_gate(NULL, "HFPERCLK.GPIO",
75 "HFXO", 0, base + CMU_HFPERCLKEN0, 13, 0, NULL);
76 hws[clk_HFPERCLKVCMP] = clk_hw_register_gate(NULL, "HFPERCLK.VCMP",
77 "HFXO", 0, base + CMU_HFPERCLKEN0, 14, 0, NULL);
78 hws[clk_HFPERCLKPRS] = clk_hw_register_gate(NULL, "HFPERCLK.PRS",
79 "HFXO", 0, base + CMU_HFPERCLKEN0, 15, 0, NULL);
80 hws[clk_HFPERCLKADC0] = clk_hw_register_gate(NULL, "HFPERCLK.ADC0",
81 "HFXO", 0, base + CMU_HFPERCLKEN0, 16, 0, NULL);
82 hws[clk_HFPERCLKDAC0] = clk_hw_register_gate(NULL, "HFPERCLK.DAC0",
83 "HFXO", 0, base + CMU_HFPERCLKEN0, 17, 0, NULL);
84
85 of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_data);
86 }
87 CLK_OF_DECLARE(efm32ggcmu, "efm32gg,cmu", efm32gg_cmu_init);
88