drivers/clk/mediatek/clk-mt2701-g3d.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2018 MediaTek Inc.
   4  * Author: Sean Wang <sean.wang@mediatek.com>
   5  *
   6  */
   7
   8 #include <linux/clk-provider.h>
   9 #include <linux/of.h>
  10 #include <linux/of_address.h>
  11 #include <linux/of_device.h>
  12 #include <linux/platform_device.h>
  13
  14 #include "clk-mtk.h"
  15 #include "clk-gate.h"
  16
  17 #include <dt-bindings/clock/mt2701-clk.h>
  18
  19 #define GATE_G3D(_id, _name, _parent, _shift) { \
  20                 .id = _id,                              \
  21                 .name = _name,                          \
  22                 .parent_name = _parent,                 \
  23                 .regs = &g3d_cg_regs,                   \
  24                 .shift = _shift,                        \
  25                 .ops = &mtk_clk_gate_ops_setclr,        \
  26         }
  27
  28 static const struct mtk_gate_regs g3d_cg_regs = {
  29         .sta_ofs = 0x0,
  30         .set_ofs = 0x4,
  31         .clr_ofs = 0x8,
  32 };
  33
  34 static const struct mtk_gate g3d_clks[] = {
  35         GATE_G3D(CLK_G3DSYS_CORE, "g3d_core", "mfg_sel", 0),
  36 };
  37
  38 static int clk_mt2701_g3dsys_init(struct platform_device *pdev)
  39 {
  40         struct clk_onecell_data *clk_data;
  41         struct device_node *node = pdev->dev.of_node;
  42         int r;
  43
  44         clk_data = mtk_alloc_clk_data(CLK_G3DSYS_NR);
  45
  46         mtk_clk_register_gates(node, g3d_clks, ARRAY_SIZE(g3d_clks),
  47                                clk_data);
  48
  49         r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
  50         if (r)
  51                 dev_err(&pdev->dev,
  52                         "could not register clock provider: %s: %d\n",
  53                         pdev->name, r);
  54
  55         mtk_register_reset_controller(node, 1, 0xc);
  56
  57         return r;
  58 }
  59
  60 static const struct of_device_id of_match_clk_mt2701_g3d[] = {
  61         {
  62                 .compatible = "mediatek,mt2701-g3dsys",
  63                 .data = clk_mt2701_g3dsys_init,
  64         }, {
  65                 /* sentinel */
  66         }
  67 };
  68
  69 static int clk_mt2701_g3d_probe(struct platform_device *pdev)
  70 {
  71         int (*clk_init)(struct platform_device *);
  72         int r;
  73
  74         clk_init = of_device_get_match_data(&pdev->dev);
  75         if (!clk_init)
  76                 return -EINVAL;
  77
  78         r = clk_init(pdev);
  79         if (r)
  80                 dev_err(&pdev->dev,
  81                         "could not register clock provider: %s: %d\n",
  82                         pdev->name, r);
  83
  84         return r;
  85 }
  86
  87 static struct platform_driver clk_mt2701_g3d_drv = {
  88         .probe = clk_mt2701_g3d_probe,
  89         .driver = {
  90                 .name = "clk-mt2701-g3d",
  91                 .of_match_table = of_match_clk_mt2701_g3d,
  92         },
  93 };
  94
  95 builtin_platform_driver(clk_mt2701_g3d_drv);