1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2013 Soren Brinkmann <soren.brinkmann@xilinx.com>
4 * Copyright (C) 2013 Xilinx, Inc. All rights reserved.
5 */
6 #include <clk.h>
7 #include <common.h>
8 #include <dm.h>
9 #include <asm/arch/clk.h>
10
11 DECLARE_GLOBAL_DATA_PTR;
12
13 static const char * const clk_names[clk_max] = {
14 "armpll", "ddrpll", "iopll",
15 "cpu_6or4x", "cpu_3or2x", "cpu_2x", "cpu_1x",
16 "ddr2x", "ddr3x", "dci",
17 "lqspi", "smc", "pcap", "gem0", "gem1",
18 "fclk0", "fclk1", "fclk2", "fclk3", "can0", "can1",
19 "sdio0", "sdio1", "uart0", "uart1", "spi0", "spi1", "dma",
20 "usb0_aper", "usb1_aper", "gem0_aper", "gem1_aper",
21 "sdio0_aper", "sdio1_aper", "spi0_aper", "spi1_aper",
22 "can0_aper", "can1_aper", "i2c0_aper", "i2c1_aper",
23 "uart0_aper", "uart1_aper", "gpio_aper", "lqspi_aper",
24 "smc_aper", "swdt", "dbg_trc", "dbg_apb"
25 };
26
27 /**
28 * set_cpu_clk_info() - Setup clock information
29 *
30 * This function is called from common code after relocation and sets up the
31 * clock information.
32 */
set_cpu_clk_info(void)33 int set_cpu_clk_info(void)
34 {
35 struct clk clk;
36 struct udevice *dev;
37 ulong rate;
38 int i, ret;
39
40 ret = uclass_get_device_by_driver(UCLASS_CLK,
41 DM_GET_DRIVER(zynq_clk), &dev);
42 if (ret)
43 return ret;
44
45 for (i = 0; i < 2; i++) {
46 clk.id = i ? ddr3x_clk : cpu_6or4x_clk;
47 ret = clk_request(dev, &clk);
48 if (ret < 0)
49 return ret;
50
51 rate = clk_get_rate(&clk) / 1000000;
52 if (i)
53 gd->bd->bi_ddr_freq = rate;
54 else
55 gd->bd->bi_arm_freq = rate;
56
57 clk_free(&clk);
58 }
59 gd->bd->bi_dsp_freq = 0;
60
61 return 0;
62 }
63
64 /**
65 * soc_clk_dump() - Print clock frequencies
66 * Returns zero on success
67 *
68 * Implementation for the clk dump command.
69 */
soc_clk_dump(void)70 int soc_clk_dump(void)
71 {
72 struct udevice *dev;
73 int i, ret;
74
75 ret = uclass_get_device_by_driver(UCLASS_CLK,
76 DM_GET_DRIVER(zynq_clk), &dev);
77 if (ret)
78 return ret;
79
80 printf("clk\t\tfrequency\n");
81 for (i = 0; i < clk_max; i++) {
82 const char *name = clk_names[i];
83 if (name) {
84 struct clk clk;
85 unsigned long rate;
86
87 clk.id = i;
88 ret = clk_request(dev, &clk);
89 if (ret < 0)
90 return ret;
91
92 rate = clk_get_rate(&clk);
93
94 clk_free(&clk);
95
96 if ((rate == (unsigned long)-ENOSYS) ||
97 (rate == (unsigned long)-ENXIO))
98 printf("%10s%20s\n", name, "unknown");
99 else
100 printf("%10s%20lu\n", name, rate);
101 }
102 }
103
104 return 0;
105 }
106