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 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 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 53 static void __iomem *_msm_ioremap(struct platform_device *pdev, const char *name, 54 bool quiet, phys_addr_t *psize) 55 { 56 struct resource *res; 57 unsigned long size; 58 void __iomem *ptr; 59 60 if (name) 61 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name); 62 else 63 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 64 65 if (!res) { 66 if (!quiet) 67 DRM_DEV_ERROR(&pdev->dev, "failed to get memory resource: %s\n", name); 68 return ERR_PTR(-EINVAL); 69 } 70 71 size = resource_size(res); 72 73 ptr = devm_ioremap(&pdev->dev, res->start, size); 74 if (!ptr) { 75 if (!quiet) 76 DRM_DEV_ERROR(&pdev->dev, "failed to ioremap: %s\n", name); 77 return ERR_PTR(-ENOMEM); 78 } 79 80 if (psize) 81 *psize = size; 82 83 return ptr; 84 } 85 86 void __iomem *msm_ioremap(struct platform_device *pdev, const char *name) 87 { 88 return _msm_ioremap(pdev, name, false, NULL); 89 } 90 91 void __iomem *msm_ioremap_quiet(struct platform_device *pdev, const char *name) 92 { 93 return _msm_ioremap(pdev, name, true, NULL); 94 } 95 96 void __iomem *msm_ioremap_size(struct platform_device *pdev, const char *name, 97 phys_addr_t *psize) 98 { 99 return _msm_ioremap(pdev, name, false, psize); 100 } 101 102 static enum hrtimer_restart msm_hrtimer_worktimer(struct hrtimer *t) 103 { 104 struct msm_hrtimer_work *work = container_of(t, 105 struct msm_hrtimer_work, timer); 106 107 kthread_queue_work(work->worker, &work->work); 108 109 return HRTIMER_NORESTART; 110 } 111 112 void msm_hrtimer_queue_work(struct msm_hrtimer_work *work, 113 ktime_t wakeup_time, 114 enum hrtimer_mode mode) 115 { 116 hrtimer_start(&work->timer, wakeup_time, mode); 117 } 118 119 void msm_hrtimer_work_init(struct msm_hrtimer_work *work, 120 struct kthread_worker *worker, 121 kthread_work_func_t fn, 122 clockid_t clock_id, 123 enum hrtimer_mode mode) 124 { 125 hrtimer_init(&work->timer, clock_id, mode); 126 work->timer.function = msm_hrtimer_worktimer; 127 work->worker = worker; 128 kthread_init_work(&work->work, fn); 129 } 130 131 struct icc_path *msm_icc_get(struct device *dev, const char *name) 132 { 133 struct device *mdss_dev = dev->parent; 134 struct icc_path *path; 135 136 path = of_icc_get(dev, name); 137 if (path) 138 return path; 139 140 /* 141 * If there are no interconnects attached to the corresponding device 142 * node, of_icc_get() will return NULL. 143 * 144 * If the MDP5/DPU device node doesn't have interconnects, lookup the 145 * path in the parent (MDSS) device. 146 */ 147 return of_icc_get(mdss_dev, name); 148 149 } 150