1 /* 2 * Copyright (C) 2016 Atmel Corporation 3 * Wenyou.Yang <wenyou.yang@atmel.com> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <clk-uclass.h> 10 #include <dm.h> 11 #include <dm/lists.h> 12 #include <dm/util.h> 13 #include "pmc.h" 14 15 DECLARE_GLOBAL_DATA_PTR; 16 17 static const struct udevice_id at91_pmc_match[] = { 18 { .compatible = "atmel,at91rm9200-pmc" }, 19 { .compatible = "atmel,at91sam9260-pmc" }, 20 { .compatible = "atmel,at91sam9g45-pmc" }, 21 { .compatible = "atmel,at91sam9n12-pmc" }, 22 { .compatible = "atmel,at91sam9x5-pmc" }, 23 { .compatible = "atmel,sama5d3-pmc" }, 24 { .compatible = "atmel,sama5d2-pmc" }, 25 {} 26 }; 27 28 U_BOOT_DRIVER(at91_pmc) = { 29 .name = "at91-pmc", 30 .id = UCLASS_SIMPLE_BUS, 31 .of_match = at91_pmc_match, 32 }; 33 34 /*---------------------------------------------------------*/ 35 36 int at91_pmc_core_probe(struct udevice *dev) 37 { 38 struct pmc_platdata *plat = dev_get_platdata(dev); 39 40 dev = dev_get_parent(dev); 41 42 plat->reg_base = (struct at91_pmc *)devfdt_get_addr_ptr(dev); 43 44 return 0; 45 } 46 47 /** 48 * at91_clk_sub_device_bind() - for the at91 clock driver 49 * Recursively bind its children as clk devices. 50 * 51 * @return: 0 on success, or negative error code on failure 52 */ 53 int at91_clk_sub_device_bind(struct udevice *dev, const char *drv_name) 54 { 55 const void *fdt = gd->fdt_blob; 56 int offset = dev_of_offset(dev); 57 bool pre_reloc_only = !(gd->flags & GD_FLG_RELOC); 58 const char *name; 59 int ret; 60 61 for (offset = fdt_first_subnode(fdt, offset); 62 offset > 0; 63 offset = fdt_next_subnode(fdt, offset)) { 64 if (pre_reloc_only && 65 !dm_fdt_pre_reloc(fdt, offset)) 66 continue; 67 /* 68 * If this node has "compatible" property, this is not 69 * a clock sub-node, but a normal device. skip. 70 */ 71 fdt_get_property(fdt, offset, "compatible", &ret); 72 if (ret >= 0) 73 continue; 74 75 if (ret != -FDT_ERR_NOTFOUND) 76 return ret; 77 78 name = fdt_get_name(fdt, offset, NULL); 79 if (!name) 80 return -EINVAL; 81 ret = device_bind_driver_to_node(dev, drv_name, name, 82 offset_to_ofnode(offset), NULL); 83 if (ret) 84 return ret; 85 } 86 87 return 0; 88 } 89 90 int at91_clk_of_xlate(struct clk *clk, struct ofnode_phandle_args *args) 91 { 92 int periph; 93 94 if (args->args_count) { 95 debug("Invalid args_count: %d\n", args->args_count); 96 return -EINVAL; 97 } 98 99 periph = fdtdec_get_uint(gd->fdt_blob, dev_of_offset(clk->dev), "reg", 100 -1); 101 if (periph < 0) 102 return -EINVAL; 103 104 clk->id = periph; 105 106 return 0; 107 } 108 109 int at91_clk_probe(struct udevice *dev) 110 { 111 struct udevice *dev_periph_container, *dev_pmc; 112 struct pmc_platdata *plat = dev_get_platdata(dev); 113 114 dev_periph_container = dev_get_parent(dev); 115 dev_pmc = dev_get_parent(dev_periph_container); 116 117 plat->reg_base = (struct at91_pmc *)devfdt_get_addr_ptr(dev_pmc); 118 119 return 0; 120 } 121