1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * devtree.c - convenience functions for device tree manipulation
25 	if (getprop(root, "#address-cells", &naddr, sizeof(naddr)) < 0)  in dt_fixup_memory()
30 		fatal("Can't cope with #address-cells == %d in /\n\r", naddr);  in dt_fixup_memory()
32 	if (getprop(root, "#size-cells", &nsize, sizeof(nsize)) < 0)  in dt_fixup_memory()
37 		fatal("Can't cope with #size-cells == %d in /\n\r", nsize);  in dt_fixup_memory()
53 	printf("Memory <- <0x%x", be32_to_cpu(memreg[0]));  in dt_fixup_memory()
58 	setprop(memory, "reg", memreg, (naddr + nsize)*sizeof(u32));  in dt_fixup_memory()
67 	printf("CPU clock-frequency <- 0x%x (%dMHz)\n\r", cpu, MHZ(cpu));  in dt_fixup_cpu_clocks()
68 	printf("CPU timebase-frequency <- 0x%x (%dMHz)\n\r", tb, MHZ(tb));  in dt_fixup_cpu_clocks()
70 		printf("CPU bus-frequency <- 0x%x (%dMHz)\n\r", bus, MHZ(bus));  in dt_fixup_cpu_clocks()
73 		setprop_val(devp, "clock-frequency", cpu_to_be32(cpu));  in dt_fixup_cpu_clocks()
74 		setprop_val(devp, "timebase-frequency", cpu_to_be32(tb));  in dt_fixup_cpu_clocks()
76 			setprop_val(devp, "bus-frequency", cpu_to_be32(bus));  in dt_fixup_cpu_clocks()
87 		printf("%s: clock-frequency <- %x (%dMHz)\n\r", path, freq, MHZ(freq));  in dt_fixup_clock()
88 		setprop_val(devp, "clock-frequency", cpu_to_be32(freq));  in dt_fixup_clock()
92 void dt_fixup_mac_address_by_alias(const char *alias, const u8 *addr)  in dt_fixup_mac_address_by_alias()  argument
97 		printf("%s: local-mac-address <-"  in dt_fixup_mac_address_by_alias()
99 		       addr[0], addr[1], addr[2],  in dt_fixup_mac_address_by_alias()
100 		       addr[3], addr[4], addr[5]);  in dt_fixup_mac_address_by_alias()
102 		setprop(devp, "local-mac-address", addr, 6);  in dt_fixup_mac_address_by_alias()
106 void dt_fixup_mac_address(u32 index, const u8 *addr)  in dt_fixup_mac_address()  argument
108 	void *devp = find_node_by_prop_value(NULL, "linux,network-index",  in dt_fixup_mac_address()
112 		printf("ENET%d: local-mac-address <-"  in dt_fixup_mac_address()
114 		       addr[0], addr[1], addr[2],  in dt_fixup_mac_address()
115 		       addr[3], addr[4], addr[5]);  in dt_fixup_mac_address()
117 		setprop(devp, "local-mac-address", addr, 6);  in dt_fixup_mac_address()
125 	const u8 *addr;  in __dt_fixup_mac_addresses()  local
129 	while ((addr = va_arg(ap, const u8 *)))  in __dt_fixup_mac_addresses()
130 		dt_fixup_mac_address(index++, addr);  in __dt_fixup_mac_addresses()
139 	if (getprop(node, "#address-cells", naddr, 4) != 4)  in dt_get_reg_format()
143 	if (getprop(node, "#size-cells", nsize, 4) != 4)  in dt_get_reg_format()
151 	int pad = MAX_ADDR_CELLS - naddr;  in copy_val()
157 static int sub_reg(u32 *reg, u32 *sub)  in sub_reg()  argument
161 	for (i = MAX_ADDR_CELLS - 1; i >= 0; i--) {  in sub_reg()
163 		borrow = reg[i] < sub[i] + prev_borrow;  in sub_reg()
164 		reg[i] -= sub[i] + prev_borrow;  in sub_reg()
170 static int add_reg(u32 *reg, u32 *add, int naddr)  in add_reg()  argument
174 	for (i = MAX_ADDR_CELLS - 1; i >= MAX_ADDR_CELLS - naddr; i--) {  in add_reg()
175 		u64 tmp = (u64)be32_to_cpu(reg[i]) + be32_to_cpu(add[i]) + carry;  in add_reg()
177 		reg[i] = cpu_to_be32((u32)tmp);  in add_reg()
183 /* It is assumed that if the first byte of reg fits in a
184  * range, then the whole reg block fits.
186 static int compare_reg(u32 *reg, u32 *range, u32 *rangesize)  in compare_reg()  argument
192 		if (be32_to_cpu(reg[i]) < be32_to_cpu(range[i]))  in compare_reg()
194 		if (be32_to_cpu(reg[i]) > be32_to_cpu(range[i]))  in compare_reg()
201 		if (be32_to_cpu(reg[i]) < end)  in compare_reg()
203 		if (be32_to_cpu(reg[i]) > end)  in compare_reg()
207 	return reg[i] != end;  in compare_reg()
210 /* reg must be MAX_ADDR_CELLS */
211 static int find_range(u32 *reg, u32 *ranges, int nregaddr,  in find_range()  argument
224 		if (compare_reg(reg, range_addr, range_size))  in find_range()
228 	return -1;  in find_range()
233  * reg block is tracked; size is ignored except in ranges.
237 static int dt_xlate(void *node, int res, int reglen, unsigned long *addr,  in dt_xlate()  argument
312 	*addr = ret_addr;  in dt_xlate()
319 int dt_xlate_reg(void *node, int res, unsigned long *addr, unsigned long *size)  in dt_xlate_reg()  argument
323 	reglen = getprop(node, "reg", prop_buf, sizeof(prop_buf)) / 4;  in dt_xlate_reg()
324 	return dt_xlate(node, res, reglen, addr, size);  in dt_xlate_reg()
350 		pos += strnlen(&buf[pos], len - pos);  in dt_is_compatible()
356 int dt_get_virtual_reg(void *node, void **addr, int nres)  in dt_get_virtual_reg()  argument
361 	n = getprop(node, "virtual-reg", addr, nres * 4);  in dt_get_virtual_reg()
364 			((u32 *)addr)[i] = be32_to_cpu(((u32 *)addr)[i]);  in dt_get_virtual_reg()
372 		addr[n] = (void *)xaddr;  in dt_get_virtual_reg()