1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2016 Atmel Corporation 4 * Wenyou.Yang <wenyou.yang@atmel.com> 5 */ 6 7 #include <common.h> 8 #include <clk-uclass.h> 9 #include <dm.h> 10 #include <dm/lists.h> 11 #include <dm/util.h> 12 #include "pmc.h" 13 14 DECLARE_GLOBAL_DATA_PTR; 15 16 static const struct udevice_id at91_pmc_match[] = { 17 { .compatible = "atmel,at91rm9200-pmc" }, 18 { .compatible = "atmel,at91sam9260-pmc" }, 19 { .compatible = "atmel,at91sam9g45-pmc" }, 20 { .compatible = "atmel,at91sam9n12-pmc" }, 21 { .compatible = "atmel,at91sam9x5-pmc" }, 22 { .compatible = "atmel,sama5d3-pmc" }, 23 { .compatible = "atmel,sama5d2-pmc" }, 24 {} 25 }; 26 27 U_BOOT_DRIVER(at91_pmc) = { 28 .name = "at91-pmc", 29 .id = UCLASS_SIMPLE_BUS, 30 .of_match = at91_pmc_match, 31 }; 32 33 /*---------------------------------------------------------*/ 34 35 int at91_pmc_core_probe(struct udevice *dev) 36 { 37 struct pmc_platdata *plat = dev_get_platdata(dev); 38 39 dev = dev_get_parent(dev); 40 41 plat->reg_base = (struct at91_pmc *)devfdt_get_addr_ptr(dev); 42 43 return 0; 44 } 45 46 /** 47 * at91_clk_sub_device_bind() - for the at91 clock driver 48 * Recursively bind its children as clk devices. 49 * 50 * @return: 0 on success, or negative error code on failure 51 */ 52 int at91_clk_sub_device_bind(struct udevice *dev, const char *drv_name) 53 { 54 const void *fdt = gd->fdt_blob; 55 int offset = dev_of_offset(dev); 56 bool pre_reloc_only = !(gd->flags & GD_FLG_RELOC); 57 const char *name; 58 int ret; 59 60 for (offset = fdt_first_subnode(fdt, offset); 61 offset > 0; 62 offset = fdt_next_subnode(fdt, offset)) { 63 if (pre_reloc_only && 64 !dm_fdt_pre_reloc(fdt, offset)) 65 continue; 66 /* 67 * If this node has "compatible" property, this is not 68 * a clock sub-node, but a normal device. skip. 69 */ 70 fdt_get_property(fdt, offset, "compatible", &ret); 71 if (ret >= 0) 72 continue; 73 74 if (ret != -FDT_ERR_NOTFOUND) 75 return ret; 76 77 name = fdt_get_name(fdt, offset, NULL); 78 if (!name) 79 return -EINVAL; 80 ret = device_bind_driver_to_node(dev, drv_name, name, 81 offset_to_ofnode(offset), NULL); 82 if (ret) 83 return ret; 84 } 85 86 return 0; 87 } 88 89 int at91_clk_of_xlate(struct clk *clk, struct ofnode_phandle_args *args) 90 { 91 int periph; 92 93 if (args->args_count) { 94 debug("Invalid args_count: %d\n", args->args_count); 95 return -EINVAL; 96 } 97 98 periph = fdtdec_get_uint(gd->fdt_blob, dev_of_offset(clk->dev), "reg", 99 -1); 100 if (periph < 0) 101 return -EINVAL; 102 103 clk->id = periph; 104 105 return 0; 106 } 107 108 int at91_clk_probe(struct udevice *dev) 109 { 110 struct udevice *dev_periph_container, *dev_pmc; 111 struct pmc_platdata *plat = dev_get_platdata(dev); 112 113 dev_periph_container = dev_get_parent(dev); 114 dev_pmc = dev_get_parent(dev_periph_container); 115 116 plat->reg_base = (struct at91_pmc *)devfdt_get_addr_ptr(dev_pmc); 117 118 return 0; 119 } 120