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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /* Copyright (c) 2017 MediaTek Inc.
   3  * Author: Kevin Chen <kevin-cw.chen@mediatek.com>
   4  */
   5
   6 #include <linux/clk-provider.h>
   7 #include <linux/platform_device.h>
   8 #include <dt-bindings/clock/mt6797-clk.h>
   9
  10 #include "clk-mtk.h"
  11 #include "clk-gate.h"
  12
  13 static const struct mtk_gate_regs img_cg_regs = {
  14         .set_ofs = 0x0004,
  15         .clr_ofs = 0x0008,
  16         .sta_ofs = 0x0000,
  17 };
  18
  19 #define GATE_IMG(_id, _name, _parent, _shift) {         \
  20                 .id = _id,                              \
  21                 .name = _name,                          \
  22                 .parent_name = _parent,                 \
  23                 .regs = &img_cg_regs,                   \
  24                 .shift = _shift,                        \
  25                 .ops = &mtk_clk_gate_ops_setclr,        \
  26         }
  27
  28 static const struct mtk_gate img_clks[] = {
  29         GATE_IMG(CLK_IMG_FDVT, "img_fdvt", "mm_sel", 11),
  30         GATE_IMG(CLK_IMG_DPE, "img_dpe", "mm_sel", 10),
  31         GATE_IMG(CLK_IMG_DIP, "img_dip", "mm_sel", 6),
  32         GATE_IMG(CLK_IMG_LARB6, "img_larb6", "mm_sel", 0),
  33 };
  34
  35 static const struct of_device_id of_match_clk_mt6797_img[] = {
  36         { .compatible = "mediatek,mt6797-imgsys", },
  37         {}
  38 };
  39
  40 static int clk_mt6797_img_probe(struct platform_device *pdev)
  41 {
  42         struct clk_onecell_data *clk_data;
  43         int r;
  44         struct device_node *node = pdev->dev.of_node;
  45
  46         clk_data = mtk_alloc_clk_data(CLK_IMG_NR);
  47
  48         mtk_clk_register_gates(node, img_clks, ARRAY_SIZE(img_clks),
  49                                clk_data);
  50
  51         r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
  52         if (r)
  53                 dev_err(&pdev->dev,
  54                         "could not register clock provider: %s: %d\n",
  55                         pdev->name, r);
  56
  57         return r;
  58 }
  59
  60 static struct platform_driver clk_mt6797_img_drv = {
  61         .probe = clk_mt6797_img_probe,
  62         .driver = {
  63                 .name = "clk-mt6797-img",
  64                 .of_match_table = of_match_clk_mt6797_img,
  65         },
  66 };
  67
  68 builtin_platform_driver(clk_mt6797_img_drv);