drivers/media/platform/mediatek/mdp/mtk_mdp_comp.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2016 MediaTek Inc.
   4  * Author: Ming Hsiu Tsai <minghsiu.tsai@mediatek.com>
   5  */
   6
   7 #include <linux/clk.h>
   8 #include <linux/device.h>
   9 #include <linux/of.h>
  10
  11 #include "mtk_mdp_comp.h"
  12
  13
  14 void mtk_mdp_comp_clock_on(struct device *dev, struct mtk_mdp_comp *comp)
  15 {
  16         int i, err;
  17
  18         for (i = 0; i < ARRAY_SIZE(comp->clk); i++) {
  19                 if (IS_ERR(comp->clk[i]))
  20                         continue;
  21                 err = clk_prepare_enable(comp->clk[i]);
  22                 if (err)
  23                         dev_err(dev,
  24                         "failed to enable clock, err %d. type:%d i:%d\n",
  25                                 err, comp->type, i);
  26         }
  27 }
  28
  29 void mtk_mdp_comp_clock_off(struct device *dev, struct mtk_mdp_comp *comp)
  30 {
  31         int i;
  32
  33         for (i = 0; i < ARRAY_SIZE(comp->clk); i++) {
  34                 if (IS_ERR(comp->clk[i]))
  35                         continue;
  36                 clk_disable_unprepare(comp->clk[i]);
  37         }
  38 }
  39
  40 int mtk_mdp_comp_init(struct device *dev, struct device_node *node,
  41                       struct mtk_mdp_comp *comp,
  42                       enum mtk_mdp_comp_type comp_type)
  43 {
  44         int ret;
  45         int i;
  46
  47         comp->dev_node = of_node_get(node);
  48         comp->type = comp_type;
  49
  50         for (i = 0; i < ARRAY_SIZE(comp->clk); i++) {
  51                 comp->clk[i] = of_clk_get(node, i);
  52                 if (IS_ERR(comp->clk[i])) {
  53                         ret = dev_err_probe(dev, PTR_ERR(comp->clk[i]),
  54                                             "Failed to get clock\n");
  55                         goto put_dev;
  56                 }
  57
  58                 /* Only RDMA needs two clocks */
  59                 if (comp->type != MTK_MDP_RDMA)
  60                         break;
  61         }
  62
  63         return 0;
  64
  65 put_dev:
  66         of_node_put(comp->dev_node);
  67
  68         return ret;
  69 }
  70
  71 void mtk_mdp_comp_deinit(struct device *dev, struct mtk_mdp_comp *comp)
  72 {
  73         of_node_put(comp->dev_node);
  74 }