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 img_cg_regs = { 24 .set_ofs = 0x0004, 25 .clr_ofs = 0x0008, 26 .sta_ofs = 0x0000, 27 }; 28 29 #define GATE_IMG(_id, _name, _parent, _shift) { \ 30 .id = _id, \ 31 .name = _name, \ 32 .parent_name = _parent, \ 33 .regs = &img_cg_regs, \ 34 .shift = _shift, \ 35 .ops = &mtk_clk_gate_ops_setclr, \ 36 } 37 38 static const struct mtk_gate img_clks[] = { 39 GATE_IMG(CLK_IMG_SMI_COMM, "img_smi_comm", "mm_sel", 0), 40 GATE_IMG(CLK_IMG_RESZ, "img_resz", "mm_sel", 1), 41 GATE_IMG(CLK_IMG_JPGDEC_SMI, "img_jpgdec_smi", "mm_sel", 5), 42 GATE_IMG(CLK_IMG_JPGDEC, "img_jpgdec", "mm_sel", 6), 43 GATE_IMG(CLK_IMG_VENC_LT, "img_venc_lt", "mm_sel", 8), 44 GATE_IMG(CLK_IMG_VENC, "img_venc", "mm_sel", 9), 45 }; 46 47 static const struct of_device_id of_match_clk_mt2701_img[] = { 48 { .compatible = "mediatek,mt2701-imgsys", }, 49 {} 50 }; 51 52 static int clk_mt2701_img_probe(struct platform_device *pdev) 53 { 54 struct clk_onecell_data *clk_data; 55 int r; 56 struct device_node *node = pdev->dev.of_node; 57 58 clk_data = mtk_alloc_clk_data(CLK_IMG_NR); 59 60 mtk_clk_register_gates(node, img_clks, ARRAY_SIZE(img_clks), 61 clk_data); 62 63 r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data); 64 if (r) 65 dev_err(&pdev->dev, 66 "could not register clock provider: %s: %d\n", 67 pdev->name, r); 68 69 return r; 70 } 71 72 static struct platform_driver clk_mt2701_img_drv = { 73 .probe = clk_mt2701_img_probe, 74 .driver = { 75 .name = "clk-mt2701-img", 76 .of_match_table = of_match_clk_mt2701_img, 77 }, 78 }; 79 80 builtin_platform_driver(clk_mt2701_img_drv); 81