1 /* 2 * Copyright (c) 2017 MediaTek Inc. 3 * Author: Kevin Chen <kevin-cw.chen@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/mt6797-clk.h> 22 23 static const struct mtk_gate_regs venc_cg_regs = { 24 .set_ofs = 0x0004, 25 .clr_ofs = 0x0008, 26 .sta_ofs = 0x0000, 27 }; 28 29 #define GATE_VENC(_id, _name, _parent, _shift) { \ 30 .id = _id, \ 31 .name = _name, \ 32 .parent_name = _parent, \ 33 .regs = &venc_cg_regs, \ 34 .shift = _shift, \ 35 .ops = &mtk_clk_gate_ops_setclr_inv, \ 36 } 37 38 static const struct mtk_gate venc_clks[] = { 39 GATE_VENC(CLK_VENC_0, "venc_0", "mm_sel", 0), 40 GATE_VENC(CLK_VENC_1, "venc_1", "venc_sel", 4), 41 GATE_VENC(CLK_VENC_2, "venc_2", "venc_sel", 8), 42 GATE_VENC(CLK_VENC_3, "venc_3", "venc_sel", 12), 43 }; 44 45 static const struct of_device_id of_match_clk_mt6797_venc[] = { 46 { .compatible = "mediatek,mt6797-vencsys", }, 47 {} 48 }; 49 50 static int clk_mt6797_venc_probe(struct platform_device *pdev) 51 { 52 struct clk_onecell_data *clk_data; 53 int r; 54 struct device_node *node = pdev->dev.of_node; 55 56 clk_data = mtk_alloc_clk_data(CLK_VENC_NR); 57 58 mtk_clk_register_gates(node, venc_clks, ARRAY_SIZE(venc_clks), 59 clk_data); 60 61 r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data); 62 if (r) 63 dev_err(&pdev->dev, 64 "could not register clock provider: %s: %d\n", 65 pdev->name, r); 66 67 return r; 68 } 69 70 static struct platform_driver clk_mt6797_venc_drv = { 71 .probe = clk_mt6797_venc_probe, 72 .driver = { 73 .name = "clk-mt6797-venc", 74 .of_match_table = of_match_clk_mt6797_venc, 75 }, 76 }; 77 78 builtin_platform_driver(clk_mt6797_venc_drv); 79