drivers/clk/mediatek/clk-mt6797-img.c

   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);