1 /* Copyright (c) 2017 MediaTek Inc. 2 * Author: Kevin Chen <kevin-cw.chen@mediatek.com> 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 */ 13 14 #include <linux/clk-provider.h> 15 #include <linux/platform_device.h> 16 #include <dt-bindings/clock/mt6797-clk.h> 17 18 #include "clk-mtk.h" 19 #include "clk-gate.h" 20 21 static const struct mtk_gate_regs img_cg_regs = { 22 .set_ofs = 0x0004, 23 .clr_ofs = 0x0008, 24 .sta_ofs = 0x0000, 25 }; 26 27 #define GATE_IMG(_id, _name, _parent, _shift) { \ 28 .id = _id, \ 29 .name = _name, \ 30 .parent_name = _parent, \ 31 .regs = &img_cg_regs, \ 32 .shift = _shift, \ 33 .ops = &mtk_clk_gate_ops_setclr, \ 34 } 35 36 static const struct mtk_gate img_clks[] = { 37 GATE_IMG(CLK_IMG_FDVT, "img_fdvt", "mm_sel", 11), 38 GATE_IMG(CLK_IMG_DPE, "img_dpe", "mm_sel", 10), 39 GATE_IMG(CLK_IMG_DIP, "img_dip", "mm_sel", 6), 40 GATE_IMG(CLK_IMG_LARB6, "img_larb6", "mm_sel", 0), 41 }; 42 43 static const struct of_device_id of_match_clk_mt6797_img[] = { 44 { .compatible = "mediatek,mt6797-imgsys", }, 45 {} 46 }; 47 48 static int clk_mt6797_img_probe(struct platform_device *pdev) 49 { 50 struct clk_onecell_data *clk_data; 51 int r; 52 struct device_node *node = pdev->dev.of_node; 53 54 clk_data = mtk_alloc_clk_data(CLK_IMG_NR); 55 56 mtk_clk_register_gates(node, img_clks, ARRAY_SIZE(img_clks), 57 clk_data); 58 59 r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data); 60 if (r) 61 dev_err(&pdev->dev, 62 "could not register clock provider: %s: %d\n", 63 pdev->name, r); 64 65 return r; 66 } 67 68 static struct platform_driver clk_mt6797_img_drv = { 69 .probe = clk_mt6797_img_probe, 70 .driver = { 71 .name = "clk-mt6797-img", 72 .of_match_table = of_match_clk_mt6797_img, 73 }, 74 }; 75 76 builtin_platform_driver(clk_mt6797_img_drv); 77