1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2016 MediaTek Inc.
4 * Author: Ming Hsiu Tsai <minghsiu.tsai@mediatek.com>
8 #include <linux/device.h>
10 #include <linux/of_address.h>
11 #include <linux/of_platform.h>
12 #include <soc/mediatek/smi.h>
14 #include "mtk_mdp_comp.h"
17 void mtk_mdp_comp_clock_on(struct device *dev, struct mtk_mdp_comp *comp)
22 err = mtk_smi_larb_get(comp->larb_dev);
25 "failed to get larb, err %d. type:%d\n",
29 for (i = 0; i < ARRAY_SIZE(comp->clk); i++) {
30 if (IS_ERR(comp->clk[i]))
32 err = clk_prepare_enable(comp->clk[i]);
35 "failed to enable clock, err %d. type:%d i:%d\n",
40 void mtk_mdp_comp_clock_off(struct device *dev, struct mtk_mdp_comp *comp)
44 for (i = 0; i < ARRAY_SIZE(comp->clk); i++) {
45 if (IS_ERR(comp->clk[i]))
47 clk_disable_unprepare(comp->clk[i]);
51 mtk_smi_larb_put(comp->larb_dev);
54 int mtk_mdp_comp_init(struct device *dev, struct device_node *node,
55 struct mtk_mdp_comp *comp,
56 enum mtk_mdp_comp_type comp_type)
58 struct device_node *larb_node;
59 struct platform_device *larb_pdev;
62 comp->dev_node = of_node_get(node);
63 comp->type = comp_type;
65 for (i = 0; i < ARRAY_SIZE(comp->clk); i++) {
66 comp->clk[i] = of_clk_get(node, i);
67 if (IS_ERR(comp->clk[i])) {
68 if (PTR_ERR(comp->clk[i]) != -EPROBE_DEFER)
69 dev_err(dev, "Failed to get clock\n");
71 return PTR_ERR(comp->clk[i]);
74 /* Only RDMA needs two clocks */
75 if (comp->type != MTK_MDP_RDMA)
79 /* Only DMA capable components need the LARB property */
80 comp->larb_dev = NULL;
81 if (comp->type != MTK_MDP_RDMA &&
82 comp->type != MTK_MDP_WDMA &&
83 comp->type != MTK_MDP_WROT)
86 larb_node = of_parse_phandle(node, "mediatek,larb", 0);
89 "Missing mediadek,larb phandle in %pOF node\n", node);
93 larb_pdev = of_find_device_by_node(larb_node);
95 dev_warn(dev, "Waiting for larb device %pOF\n", larb_node);
96 of_node_put(larb_node);
99 of_node_put(larb_node);
101 comp->larb_dev = &larb_pdev->dev;
106 void mtk_mdp_comp_deinit(struct device *dev, struct mtk_mdp_comp *comp)
108 of_node_put(comp->dev_node);