1 /* 2 * Copyright (c) 2014 MediaTek Inc. 3 * Author: Shunli Wang <shunli.wang@mediatek.com> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 */ 14 15 #include <linux/clk-provider.h> 16 #include <linux/platform_device.h> 17 18 #include "clk-mtk.h" 19 #include "clk-gate.h" 20 21 #include <dt-bindings/clock/mt2701-clk.h> 22 23 static const struct mtk_gate_regs hif_cg_regs = { 24 .sta_ofs = 0x0030, 25 }; 26 27 #define GATE_HIF(_id, _name, _parent, _shift) { \ 28 .id = _id, \ 29 .name = _name, \ 30 .parent_name = _parent, \ 31 .regs = &hif_cg_regs, \ 32 .shift = _shift, \ 33 .ops = &mtk_clk_gate_ops_no_setclr_inv, \ 34 } 35 36 static const struct mtk_gate hif_clks[] = { 37 GATE_HIF(CLK_HIFSYS_USB0PHY, "usb0_phy_clk", "ethpll_500m_ck", 21), 38 GATE_HIF(CLK_HIFSYS_USB1PHY, "usb1_phy_clk", "ethpll_500m_ck", 22), 39 GATE_HIF(CLK_HIFSYS_PCIE0, "pcie0_clk", "ethpll_500m_ck", 24), 40 GATE_HIF(CLK_HIFSYS_PCIE1, "pcie1_clk", "ethpll_500m_ck", 25), 41 GATE_HIF(CLK_HIFSYS_PCIE2, "pcie2_clk", "ethpll_500m_ck", 26), 42 }; 43 44 static const struct of_device_id of_match_clk_mt2701_hif[] = { 45 { .compatible = "mediatek,mt2701-hifsys", }, 46 {} 47 }; 48 49 static int clk_mt2701_hif_probe(struct platform_device *pdev) 50 { 51 struct clk_onecell_data *clk_data; 52 int r; 53 struct device_node *node = pdev->dev.of_node; 54 55 clk_data = mtk_alloc_clk_data(CLK_HIFSYS_NR); 56 57 mtk_clk_register_gates(node, hif_clks, ARRAY_SIZE(hif_clks), 58 clk_data); 59 60 r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data); 61 if (r) { 62 dev_err(&pdev->dev, 63 "could not register clock provider: %s: %d\n", 64 pdev->name, r); 65 return r; 66 } 67 68 mtk_register_reset_controller(node, 1, 0x34); 69 70 return 0; 71 } 72 73 static struct platform_driver clk_mt2701_hif_drv = { 74 .probe = clk_mt2701_hif_probe, 75 .driver = { 76 .name = "clk-mt2701-hif", 77 .of_match_table = of_match_clk_mt2701_hif, 78 }, 79 }; 80 81 builtin_platform_driver(clk_mt2701_hif_drv); 82