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 vdec0_cg_regs = { 24 .set_ofs = 0x0000, 25 .clr_ofs = 0x0004, 26 .sta_ofs = 0x0000, 27 }; 28 29 static const struct mtk_gate_regs vdec1_cg_regs = { 30 .set_ofs = 0x0008, 31 .clr_ofs = 0x000c, 32 .sta_ofs = 0x0008, 33 }; 34 35 #define GATE_VDEC0(_id, _name, _parent, _shift) { \ 36 .id = _id, \ 37 .name = _name, \ 38 .parent_name = _parent, \ 39 .regs = &vdec0_cg_regs, \ 40 .shift = _shift, \ 41 .ops = &mtk_clk_gate_ops_setclr_inv, \ 42 } 43 44 #define GATE_VDEC1(_id, _name, _parent, _shift) { \ 45 .id = _id, \ 46 .name = _name, \ 47 .parent_name = _parent, \ 48 .regs = &vdec1_cg_regs, \ 49 .shift = _shift, \ 50 .ops = &mtk_clk_gate_ops_setclr_inv, \ 51 } 52 53 static const struct mtk_gate vdec_clks[] = { 54 GATE_VDEC0(CLK_VDEC_CKGEN, "vdec_cken", "vdec_sel", 0), 55 GATE_VDEC1(CLK_VDEC_LARB, "vdec_larb_cken", "mm_sel", 0), 56 }; 57 58 static const struct of_device_id of_match_clk_mt2701_vdec[] = { 59 { .compatible = "mediatek,mt2701-vdecsys", }, 60 {} 61 }; 62 63 static int clk_mt2701_vdec_probe(struct platform_device *pdev) 64 { 65 struct clk_onecell_data *clk_data; 66 int r; 67 struct device_node *node = pdev->dev.of_node; 68 69 clk_data = mtk_alloc_clk_data(CLK_VDEC_NR); 70 71 mtk_clk_register_gates(node, vdec_clks, ARRAY_SIZE(vdec_clks), 72 clk_data); 73 74 r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data); 75 if (r) 76 dev_err(&pdev->dev, 77 "could not register clock provider: %s: %d\n", 78 pdev->name, r); 79 80 return r; 81 } 82 83 static struct platform_driver clk_mt2701_vdec_drv = { 84 .probe = clk_mt2701_vdec_probe, 85 .driver = { 86 .name = "clk-mt2701-vdec", 87 .of_match_table = of_match_clk_mt2701_vdec, 88 }, 89 }; 90 91 builtin_platform_driver(clk_mt2701_vdec_drv); 92