1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2016-2018, 2020-2021 The Linux Foundation. All rights reserved.
4 * Copyright (C) 2013 Red Hat
5 * Author: Rob Clark <robdclark@gmail.com>
6 */
7
8#include <linux/interconnect.h>
9#include <linux/io.h>
10
11#include "msm_drv.h"
12
13/*
14 * Util/helpers:
15 */
16
17struct clk *msm_clk_bulk_get_clock(struct clk_bulk_data *bulk, int count,
18 const char *name)
19{
20 int i;
21 char n[32];
22
23 snprintf(buf: n, size: sizeof(n), fmt: "%s_clk", name);
24
25 for (i = 0; bulk && i < count; i++) {
26 if (!strcmp(bulk[i].id, name) || !strcmp(bulk[i].id, n))
27 return bulk[i].clk;
28 }
29
30
31 return NULL;
32}
33
34struct clk *msm_clk_get(struct platform_device *pdev, const char *name)
35{
36 struct clk *clk;
37 char name2[32];
38
39 clk = devm_clk_get(dev: &pdev->dev, id: name);
40 if (!IS_ERR(ptr: clk) || PTR_ERR(ptr: clk) == -EPROBE_DEFER)
41 return clk;
42
43 snprintf(buf: name2, size: sizeof(name2), fmt: "%s_clk", name);
44
45 clk = devm_clk_get(dev: &pdev->dev, id: name2);
46 if (!IS_ERR(ptr: clk))
47 dev_warn(&pdev->dev, "Using legacy clk name binding. Use "
48 "\"%s\" instead of \"%s\"\n", name, name2);
49
50 return clk;
51}
52
53void __iomem *msm_ioremap_mdss(struct platform_device *mdss_pdev,
54 struct platform_device *pdev,
55 const char *name)
56{
57 struct resource *res;
58
59 res = platform_get_resource_byname(mdss_pdev, IORESOURCE_MEM, name);
60 if (!res)
61 return ERR_PTR(error: -EINVAL);
62
63 return devm_ioremap_resource(dev: &pdev->dev, res);
64}
65
66static void __iomem *_msm_ioremap(struct platform_device *pdev, const char *name,
67 bool quiet, phys_addr_t *psize)
68{
69 struct resource *res;
70 unsigned long size;
71 void __iomem *ptr;
72
73 if (name)
74 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
75 else
76 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
77
78 if (!res) {
79 if (!quiet)
80 DRM_DEV_ERROR(&pdev->dev, "failed to get memory resource: %s\n", name);
81 return ERR_PTR(error: -EINVAL);
82 }
83
84 size = resource_size(res);
85
86 ptr = devm_ioremap(dev: &pdev->dev, offset: res->start, size);
87 if (!ptr) {
88 if (!quiet)
89 DRM_DEV_ERROR(&pdev->dev, "failed to ioremap: %s\n", name);
90 return ERR_PTR(error: -ENOMEM);
91 }
92
93 if (psize)
94 *psize = size;
95
96 return ptr;
97}
98
99void __iomem *msm_ioremap(struct platform_device *pdev, const char *name)
100{
101 return _msm_ioremap(pdev, name, quiet: false, NULL);
102}
103
104void __iomem *msm_ioremap_quiet(struct platform_device *pdev, const char *name)
105{
106 return _msm_ioremap(pdev, name, quiet: true, NULL);
107}
108
109void __iomem *msm_ioremap_size(struct platform_device *pdev, const char *name,
110 phys_addr_t *psize)
111{
112 return _msm_ioremap(pdev, name, quiet: false, psize);
113}
114
115static enum hrtimer_restart msm_hrtimer_worktimer(struct hrtimer *t)
116{
117 struct msm_hrtimer_work *work = container_of(t,
118 struct msm_hrtimer_work, timer);
119
120 kthread_queue_work(worker: work->worker, work: &work->work);
121
122 return HRTIMER_NORESTART;
123}
124
125void msm_hrtimer_queue_work(struct msm_hrtimer_work *work,
126 ktime_t wakeup_time,
127 enum hrtimer_mode mode)
128{
129 hrtimer_start(timer: &work->timer, tim: wakeup_time, mode);
130}
131
132void msm_hrtimer_work_init(struct msm_hrtimer_work *work,
133 struct kthread_worker *worker,
134 kthread_work_func_t fn,
135 clockid_t clock_id,
136 enum hrtimer_mode mode)
137{
138 hrtimer_init(timer: &work->timer, which_clock: clock_id, mode);
139 work->timer.function = msm_hrtimer_worktimer;
140 work->worker = worker;
141 kthread_init_work(&work->work, fn);
142}
143
144struct icc_path *msm_icc_get(struct device *dev, const char *name)
145{
146 struct device *mdss_dev = dev->parent;
147 struct icc_path *path;
148
149 path = of_icc_get(dev, name);
150 if (path)
151 return path;
152
153 /*
154 * If there are no interconnects attached to the corresponding device
155 * node, of_icc_get() will return NULL.
156 *
157 * If the MDP5/DPU device node doesn't have interconnects, lookup the
158 * path in the parent (MDSS) device.
159 */
160 return of_icc_get(dev: mdss_dev, name);
161
162}
163

source code of linux/drivers/gpu/drm/msm/msm_io_utils.c