1 /* 2 * Copyright (c) 2017 MediaTek Inc. 3 * Author: Weiyi Lu <weiyi.lu@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/mt2712-clk.h> 22 23 static const struct mtk_gate_regs jpgdec_cg_regs = { 24 .set_ofs = 0x4, 25 .clr_ofs = 0x8, 26 .sta_ofs = 0x0, 27 }; 28 29 #define GATE_JPGDEC(_id, _name, _parent, _shift) { \ 30 .id = _id, \ 31 .name = _name, \ 32 .parent_name = _parent, \ 33 .regs = &jpgdec_cg_regs, \ 34 .shift = _shift, \ 35 .ops = &mtk_clk_gate_ops_setclr_inv, \ 36 } 37 38 static const struct mtk_gate jpgdec_clks[] = { 39 GATE_JPGDEC(CLK_JPGDEC_JPGDEC1, "jpgdec_jpgdec1", "jpgdec_sel", 0), 40 GATE_JPGDEC(CLK_JPGDEC_JPGDEC, "jpgdec_jpgdec", "jpgdec_sel", 4), 41 }; 42 43 static int clk_mt2712_jpgdec_probe(struct platform_device *pdev) 44 { 45 struct clk_onecell_data *clk_data; 46 int r; 47 struct device_node *node = pdev->dev.of_node; 48 49 clk_data = mtk_alloc_clk_data(CLK_JPGDEC_NR_CLK); 50 51 mtk_clk_register_gates(node, jpgdec_clks, ARRAY_SIZE(jpgdec_clks), 52 clk_data); 53 54 r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data); 55 56 if (r != 0) 57 pr_err("%s(): could not register clock provider: %d\n", 58 __func__, r); 59 60 return r; 61 } 62 63 static const struct of_device_id of_match_clk_mt2712_jpgdec[] = { 64 { .compatible = "mediatek,mt2712-jpgdecsys", }, 65 {} 66 }; 67 68 static struct platform_driver clk_mt2712_jpgdec_drv = { 69 .probe = clk_mt2712_jpgdec_probe, 70 .driver = { 71 .name = "clk-mt2712-jpgdec", 72 .of_match_table = of_match_clk_mt2712_jpgdec, 73 }, 74 }; 75 76 builtin_platform_driver(clk_mt2712_jpgdec_drv); 77