1 /* 2 * Copyright (C) 2013 Soren Brinkmann <soren.brinkmann@xilinx.com> 3 * Copyright (C) 2013 Xilinx, Inc. All rights reserved. 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 #include <clk.h> 8 #include <common.h> 9 #include <dm.h> 10 #include <asm/arch/clk.h> 11 12 DECLARE_GLOBAL_DATA_PTR; 13 14 static const char * const clk_names[clk_max] = { 15 "armpll", "ddrpll", "iopll", 16 "cpu_6or4x", "cpu_3or2x", "cpu_2x", "cpu_1x", 17 "ddr2x", "ddr3x", "dci", 18 "lqspi", "smc", "pcap", "gem0", "gem1", 19 "fclk0", "fclk1", "fclk2", "fclk3", "can0", "can1", 20 "sdio0", "sdio1", "uart0", "uart1", "spi0", "spi1", "dma", 21 "usb0_aper", "usb1_aper", "gem0_aper", "gem1_aper", 22 "sdio0_aper", "sdio1_aper", "spi0_aper", "spi1_aper", 23 "can0_aper", "can1_aper", "i2c0_aper", "i2c1_aper", 24 "uart0_aper", "uart1_aper", "gpio_aper", "lqspi_aper", 25 "smc_aper", "swdt", "dbg_trc", "dbg_apb" 26 }; 27 28 /** 29 * set_cpu_clk_info() - Setup clock information 30 * 31 * This function is called from common code after relocation and sets up the 32 * clock information. 33 */ 34 int set_cpu_clk_info(void) 35 { 36 struct clk clk; 37 struct udevice *dev; 38 ulong rate; 39 int i, ret; 40 41 ret = uclass_get_device_by_driver(UCLASS_CLK, 42 DM_GET_DRIVER(zynq_clk), &dev); 43 if (ret) 44 return ret; 45 46 for (i = 0; i < 2; i++) { 47 clk.id = i ? ddr3x_clk : cpu_6or4x_clk; 48 ret = clk_request(dev, &clk); 49 if (ret < 0) 50 return ret; 51 52 rate = clk_get_rate(&clk) / 1000000; 53 if (i) 54 gd->bd->bi_ddr_freq = rate; 55 else 56 gd->bd->bi_arm_freq = rate; 57 58 clk_free(&clk); 59 } 60 gd->bd->bi_dsp_freq = 0; 61 62 return 0; 63 } 64 65 /** 66 * soc_clk_dump() - Print clock frequencies 67 * Returns zero on success 68 * 69 * Implementation for the clk dump command. 70 */ 71 int soc_clk_dump(void) 72 { 73 struct udevice *dev; 74 int i, ret; 75 76 ret = uclass_get_device_by_driver(UCLASS_CLK, 77 DM_GET_DRIVER(zynq_clk), &dev); 78 if (ret) 79 return ret; 80 81 printf("clk\t\tfrequency\n"); 82 for (i = 0; i < clk_max; i++) { 83 const char *name = clk_names[i]; 84 if (name) { 85 struct clk clk; 86 unsigned long rate; 87 88 clk.id = i; 89 ret = clk_request(dev, &clk); 90 if (ret < 0) 91 return ret; 92 93 rate = clk_get_rate(&clk); 94 95 clk_free(&clk); 96 97 if ((rate == (unsigned long)-ENOSYS) || 98 (rate == (unsigned long)-ENXIO)) 99 printf("%10s%20s\n", name, "unknown"); 100 else 101 printf("%10s%20lu\n", name, rate); 102 } 103 } 104 105 return 0; 106 } 107