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 */ 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 */ 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