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

   1 /*
   2  * Copyright (c) 2014 MediaTek Inc.
   3  * Author: Shunli Wang <shunli.wang@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/mt2701-clk.h>
  22
  23 static const struct mtk_gate_regs img_cg_regs = {
  24         .set_ofs = 0x0004,
  25         .clr_ofs = 0x0008,
  26         .sta_ofs = 0x0000,
  27 };
  28
  29 #define GATE_IMG(_id, _name, _parent, _shift) {         \
  30                 .id = _id,                              \
  31                 .name = _name,                          \
  32                 .parent_name = _parent,                 \
  33                 .regs = &img_cg_regs,                   \
  34                 .shift = _shift,                        \
  35                 .ops = &mtk_clk_gate_ops_setclr,        \
  36         }
  37
  38 static const struct mtk_gate img_clks[] = {
  39         GATE_IMG(CLK_IMG_SMI_COMM, "img_smi_comm", "mm_sel", 0),
  40         GATE_IMG(CLK_IMG_RESZ, "img_resz", "mm_sel", 1),
  41         GATE_IMG(CLK_IMG_JPGDEC_SMI, "img_jpgdec_smi", "mm_sel", 5),
  42         GATE_IMG(CLK_IMG_JPGDEC, "img_jpgdec", "mm_sel", 6),
  43         GATE_IMG(CLK_IMG_VENC_LT, "img_venc_lt", "mm_sel", 8),
  44         GATE_IMG(CLK_IMG_VENC, "img_venc", "mm_sel", 9),
  45 };
  46
  47 static const struct of_device_id of_match_clk_mt2701_img[] = {
  48         { .compatible = "mediatek,mt2701-imgsys", },
  49         {}
  50 };
  51
  52 static int clk_mt2701_img_probe(struct platform_device *pdev)
  53 {
  54         struct clk_onecell_data *clk_data;
  55         int r;
  56         struct device_node *node = pdev->dev.of_node;
  57
  58         clk_data = mtk_alloc_clk_data(CLK_IMG_NR);
  59
  60         mtk_clk_register_gates(node, img_clks, ARRAY_SIZE(img_clks),
  61                                                 clk_data);
  62
  63         r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
  64         if (r)
  65                 dev_err(&pdev->dev,
  66                         "could not register clock provider: %s: %d\n",
  67                         pdev->name, r);
  68
  69         return r;
  70 }
  71
  72 static struct platform_driver clk_mt2701_img_drv = {
  73         .probe = clk_mt2701_img_probe,
  74         .driver = {
  75                 .name = "clk-mt2701-img",
  76                 .of_match_table = of_match_clk_mt2701_img,
  77         },
  78 };
  79
  80 builtin_platform_driver(clk_mt2701_img_drv);