1 /* 2 * Copyright (C) 2015 Google, Inc 3 * Written by Simon Glass <sjg@chromium.org> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <dm.h> 10 #include <errno.h> 11 #include <video_bridge.h> 12 13 int video_bridge_set_backlight(struct udevice *dev, int percent) 14 { 15 struct video_bridge_ops *ops = video_bridge_get_ops(dev); 16 17 if (!ops->set_backlight) 18 return -ENOSYS; 19 20 return ops->set_backlight(dev, percent); 21 } 22 23 int video_bridge_attach(struct udevice *dev) 24 { 25 struct video_bridge_ops *ops = video_bridge_get_ops(dev); 26 27 if (!ops->attach) 28 return -ENOSYS; 29 30 return ops->attach(dev); 31 } 32 33 int video_bridge_check_attached(struct udevice *dev) 34 { 35 struct video_bridge_priv *uc_priv = dev_get_uclass_priv(dev); 36 struct video_bridge_ops *ops = video_bridge_get_ops(dev); 37 int ret; 38 39 if (!ops->check_attached) { 40 ret = dm_gpio_get_value(&uc_priv->hotplug); 41 42 return ret > 0 ? 0 : ret == 0 ? -ENOTCONN : ret; 43 } 44 45 return ops->check_attached(dev); 46 } 47 48 static int video_bridge_pre_probe(struct udevice *dev) 49 { 50 struct video_bridge_priv *uc_priv = dev_get_uclass_priv(dev); 51 int ret; 52 53 debug("%s\n", __func__); 54 ret = gpio_request_by_name(dev, "sleep-gpios", 0, 55 &uc_priv->sleep, GPIOD_IS_OUT); 56 if (ret) { 57 debug("%s: Could not decode sleep-gpios (%d)\n", __func__, ret); 58 if (ret != -ENOENT) 59 return ret; 60 } 61 /* 62 * Drop this for now as we do not have driver model pinctrl support 63 * 64 * ret = dm_gpio_set_pull(&uc_priv->sleep, GPIO_PULL_NONE); 65 * if (ret) { 66 * debug("%s: Could not set sleep pull value\n", __func__); 67 * return ret; 68 * } 69 */ 70 ret = gpio_request_by_name(dev, "reset-gpios", 0, &uc_priv->reset, 71 GPIOD_IS_OUT); 72 if (ret) { 73 debug("%s: Could not decode reset-gpios (%d)\n", __func__, ret); 74 if (ret != -ENOENT) 75 return ret; 76 } 77 /* 78 * Drop this for now as we do not have driver model pinctrl support 79 * 80 * ret = dm_gpio_set_pull(&uc_priv->reset, GPIO_PULL_NONE); 81 * if (ret) { 82 * debug("%s: Could not set reset pull value\n", __func__); 83 * return ret; 84 * } 85 */ 86 ret = gpio_request_by_name(dev, "hotplug-gpios", 0, &uc_priv->hotplug, 87 GPIOD_IS_IN); 88 if (ret) { 89 debug("%s: Could not decode hotplug (%d)\n", __func__, ret); 90 if (ret != -ENOENT) 91 return ret; 92 } 93 94 return 0; 95 } 96 97 int video_bridge_set_active(struct udevice *dev, bool active) 98 { 99 struct video_bridge_priv *uc_priv = dev_get_uclass_priv(dev); 100 int ret; 101 102 debug("%s: %d\n", __func__, active); 103 ret = dm_gpio_set_value(&uc_priv->sleep, !active); 104 if (ret) 105 return ret; 106 if (active) { 107 ret = dm_gpio_set_value(&uc_priv->reset, true); 108 if (ret) 109 return ret; 110 udelay(10); 111 ret = dm_gpio_set_value(&uc_priv->reset, false); 112 } 113 114 return ret; 115 } 116 117 UCLASS_DRIVER(video_bridge) = { 118 .id = UCLASS_VIDEO_BRIDGE, 119 .name = "video_bridge", 120 .per_device_auto_alloc_size = sizeof(struct video_bridge_priv), 121 .pre_probe = video_bridge_pre_probe, 122 }; 123