1 /* 2 * Abilis Systems TB10x platform initialisation 3 * 4 * Copyright (C) Abilis Systems 2012 5 * 6 * Author: Christian Ruppert <christian.ruppert@abilis.com> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 */ 21 22 23 #include <linux/init.h> 24 #include <linux/of_platform.h> 25 #include <linux/clk-provider.h> 26 #include <linux/pinctrl/consumer.h> 27 28 #include <asm/mach_desc.h> 29 30 31 static void __init tb10x_platform_init(void) 32 { 33 of_clk_init(NULL); 34 of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); 35 } 36 37 static void __init tb10x_platform_late_init(void) 38 { 39 struct device_node *dn; 40 41 /* 42 * Pinctrl documentation recommends setting up the iomux here for 43 * all modules which don't require control over the pins themselves. 44 * Modules which need this kind of assistance are compatible with 45 * "abilis,simple-pinctrl", i.e. we can easily iterate over them. 46 * TODO: Does this recommended method work cleanly with pins required 47 * by modules? 48 */ 49 for_each_compatible_node(dn, NULL, "abilis,simple-pinctrl") { 50 struct platform_device *pd = of_find_device_by_node(dn); 51 struct pinctrl *pctl; 52 53 pctl = pinctrl_get_select(&pd->dev, "abilis,simple-default"); 54 if (IS_ERR(pctl)) { 55 int ret = PTR_ERR(pctl); 56 dev_err(&pd->dev, "Could not set up pinctrl: %d\n", 57 ret); 58 } 59 } 60 } 61 62 static const char *tb10x_compat[] __initdata = { 63 "abilis,arc-tb10x", 64 NULL, 65 }; 66 67 MACHINE_START(TB10x, "tb10x") 68 .dt_compat = tb10x_compat, 69 .init_machine = tb10x_platform_init, 70 .init_late = tb10x_platform_late_init, 71 MACHINE_END 72