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
msm_clk_bulk_get_clock(struct clk_bulk_data * bulk,int count,const char * name)17 struct 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(n, sizeof(n), "%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
msm_clk_get(struct platform_device * pdev,const char * name)34 struct 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(&pdev->dev, name);
40 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
41 return clk;
42
43 snprintf(name2, sizeof(name2), "%s_clk", name);
44
45 clk = devm_clk_get(&pdev->dev, name2);
46 if (!IS_ERR(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
msm_ioremap_mdss(struct platform_device * mdss_pdev,struct platform_device * pdev,const char * name)53 void __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(-EINVAL);
62
63 return devm_ioremap_resource(&pdev->dev, res);
64 }
65
_msm_ioremap(struct platform_device * pdev,const char * name,bool quiet,phys_addr_t * psize)66 static 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(-EINVAL);
82 }
83
84 size = resource_size(res);
85
86 ptr = devm_ioremap(&pdev->dev, 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(-ENOMEM);
91 }
92
93 if (psize)
94 *psize = size;
95
96 return ptr;
97 }
98
msm_ioremap(struct platform_device * pdev,const char * name)99 void __iomem *msm_ioremap(struct platform_device *pdev, const char *name)
100 {
101 return _msm_ioremap(pdev, name, false, NULL);
102 }
103
msm_ioremap_quiet(struct platform_device * pdev,const char * name)104 void __iomem *msm_ioremap_quiet(struct platform_device *pdev, const char *name)
105 {
106 return _msm_ioremap(pdev, name, true, NULL);
107 }
108
msm_ioremap_size(struct platform_device * pdev,const char * name,phys_addr_t * psize)109 void __iomem *msm_ioremap_size(struct platform_device *pdev, const char *name,
110 phys_addr_t *psize)
111 {
112 return _msm_ioremap(pdev, name, false, psize);
113 }
114
msm_hrtimer_worktimer(struct hrtimer * t)115 static 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(work->worker, &work->work);
121
122 return HRTIMER_NORESTART;
123 }
124
msm_hrtimer_queue_work(struct msm_hrtimer_work * work,ktime_t wakeup_time,enum hrtimer_mode mode)125 void msm_hrtimer_queue_work(struct msm_hrtimer_work *work,
126 ktime_t wakeup_time,
127 enum hrtimer_mode mode)
128 {
129 hrtimer_start(&work->timer, wakeup_time, mode);
130 }
131
msm_hrtimer_work_init(struct msm_hrtimer_work * work,struct kthread_worker * worker,kthread_work_func_t fn,clockid_t clock_id,enum hrtimer_mode mode)132 void 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(&work->timer, clock_id, mode);
139 work->timer.function = msm_hrtimer_worktimer;
140 work->worker = worker;
141 kthread_init_work(&work->work, fn);
142 }
143
msm_icc_get(struct device * dev,const char * name)144 struct 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(mdss_dev, name);
161
162 }
163