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/device.h> 11 #include <dm/lists.h> 12 #include <dm/root.h> 13 #include <dm/util.h> 14 #include "pmc.h" 15 16 DECLARE_GLOBAL_DATA_PTR; 17 18 static const struct udevice_id at91_pmc_match[] = { 19 { .compatible = "atmel,at91rm9200-pmc" }, 20 { .compatible = "atmel,at91sam9260-pmc" }, 21 { .compatible = "atmel,at91sam9g45-pmc" }, 22 { .compatible = "atmel,at91sam9n12-pmc" }, 23 { .compatible = "atmel,at91sam9x5-pmc" }, 24 { .compatible = "atmel,sama5d3-pmc" }, 25 { .compatible = "atmel,sama5d2-pmc" }, 26 {} 27 }; 28 29 U_BOOT_DRIVER(at91_pmc) = { 30 .name = "at91-pmc", 31 .id = UCLASS_SIMPLE_BUS, 32 .of_match = at91_pmc_match, 33 }; 34 35 /*---------------------------------------------------------*/ 36 37 int at91_pmc_core_probe(struct udevice *dev) 38 { 39 struct pmc_platdata *plat = dev_get_platdata(dev); 40 41 dev = dev_get_parent(dev); 42 43 plat->reg_base = (struct at91_pmc *)dev_get_addr_ptr(dev); 44 45 return 0; 46 } 47 48 /** 49 * at91_clk_sub_device_bind() - for the at91 clock driver 50 * Recursively bind its children as clk devices. 51 * 52 * @return: 0 on success, or negative error code on failure 53 */ 54 int at91_clk_sub_device_bind(struct udevice *dev, const char *drv_name) 55 { 56 const void *fdt = gd->fdt_blob; 57 int offset = dev_of_offset(dev); 58 bool pre_reloc_only = !(gd->flags & GD_FLG_RELOC); 59 const char *name; 60 int ret; 61 62 for (offset = fdt_first_subnode(fdt, offset); 63 offset > 0; 64 offset = fdt_next_subnode(fdt, offset)) { 65 if (pre_reloc_only && 66 !dm_fdt_pre_reloc(fdt, offset)) 67 continue; 68 /* 69 * If this node has "compatible" property, this is not 70 * a clock sub-node, but a normal device. skip. 71 */ 72 fdt_get_property(fdt, offset, "compatible", &ret); 73 if (ret >= 0) 74 continue; 75 76 if (ret != -FDT_ERR_NOTFOUND) 77 return ret; 78 79 name = fdt_get_name(fdt, offset, NULL); 80 if (!name) 81 return -EINVAL; 82 ret = device_bind_driver_to_node(dev, drv_name, name, 83 offset, NULL); 84 if (ret) 85 return ret; 86 } 87 88 return 0; 89 } 90 91 int at91_clk_of_xlate(struct clk *clk, struct fdtdec_phandle_args *args) 92 { 93 int periph; 94 95 if (args->args_count) { 96 debug("Invalid args_count: %d\n", args->args_count); 97 return -EINVAL; 98 } 99 100 periph = fdtdec_get_uint(gd->fdt_blob, dev_of_offset(clk->dev), "reg", 101 -1); 102 if (periph < 0) 103 return -EINVAL; 104 105 clk->id = periph; 106 107 return 0; 108 } 109 110 int at91_clk_probe(struct udevice *dev) 111 { 112 struct udevice *dev_periph_container, *dev_pmc; 113 struct pmc_platdata *plat = dev_get_platdata(dev); 114 115 dev_periph_container = dev_get_parent(dev); 116 dev_pmc = dev_get_parent(dev_periph_container); 117 118 plat->reg_base = (struct at91_pmc *)dev_get_addr_ptr(dev_pmc); 119 120 return 0; 121 } 122