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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2014 MediaTek Inc.
   4  * Author: Shunli Wang <shunli.wang@mediatek.com>
   5  */
   6
   7 #include <linux/clk-provider.h>
   8 #include <linux/platform_device.h>
   9
  10 #include "clk-mtk.h"
  11 #include "clk-gate.h"
  12
  13 #include <dt-bindings/clock/mt2701-clk.h>
  14
  15 static const struct mtk_gate_regs vdec0_cg_regs = {
  16         .set_ofs = 0x0000,
  17         .clr_ofs = 0x0004,
  18         .sta_ofs = 0x0000,
  19 };
  20
  21 static const struct mtk_gate_regs vdec1_cg_regs = {
  22         .set_ofs = 0x0008,
  23         .clr_ofs = 0x000c,
  24         .sta_ofs = 0x0008,
  25 };
  26
  27 #define GATE_VDEC0(_id, _name, _parent, _shift) {       \
  28                 .id = _id,                              \
  29                 .name = _name,                          \
  30                 .parent_name = _parent,                 \
  31                 .regs = &vdec0_cg_regs,                 \
  32                 .shift = _shift,                        \
  33                 .ops = &mtk_clk_gate_ops_setclr_inv,    \
  34         }
  35
  36 #define GATE_VDEC1(_id, _name, _parent, _shift) {       \
  37                 .id = _id,                              \
  38                 .name = _name,                          \
  39                 .parent_name = _parent,                 \
  40                 .regs = &vdec1_cg_regs,                 \
  41                 .shift = _shift,                        \
  42                 .ops = &mtk_clk_gate_ops_setclr_inv,    \
  43         }
  44
  45 static const struct mtk_gate vdec_clks[] = {
  46         GATE_VDEC0(CLK_VDEC_CKGEN, "vdec_cken", "vdec_sel", 0),
  47         GATE_VDEC1(CLK_VDEC_LARB, "vdec_larb_cken", "mm_sel", 0),
  48 };
  49
  50 static const struct of_device_id of_match_clk_mt2701_vdec[] = {
  51         { .compatible = "mediatek,mt2701-vdecsys", },
  52         {}
  53 };
  54
  55 static int clk_mt2701_vdec_probe(struct platform_device *pdev)
  56 {
  57         struct clk_onecell_data *clk_data;
  58         int r;
  59         struct device_node *node = pdev->dev.of_node;
  60
  61         clk_data = mtk_alloc_clk_data(CLK_VDEC_NR);
  62
  63         mtk_clk_register_gates(node, vdec_clks, ARRAY_SIZE(vdec_clks),
  64                                                 clk_data);
  65
  66         r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
  67         if (r)
  68                 dev_err(&pdev->dev,
  69                         "could not register clock provider: %s: %d\n",
  70                         pdev->name, r);
  71
  72         return r;
  73 }
  74
  75 static struct platform_driver clk_mt2701_vdec_drv = {
  76         .probe = clk_mt2701_vdec_probe,
  77         .driver = {
  78                 .name = "clk-mt2701-vdec",
  79                 .of_match_table = of_match_clk_mt2701_vdec,
  80         },
  81 };
  82
  83 builtin_platform_driver(clk_mt2701_vdec_drv);