drivers/misc/irq-uclass.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2019 Google, LLC
   4  * Written by Simon Glass <sjg@chromium.org>
   5  */
   6
   7 #define LOG_CATEGORY UCLASS_IRQ
   8
   9 #include <common.h>
  10 #include <dm.h>
  11 #include <dt-structs.h>
  12 #include <irq.h>
  13 #include <log.h>
  14 #include <dm/device-internal.h>
  15
  16 int irq_route_pmc_gpio_gpe(struct udevice *dev, uint pmc_gpe_num)
  17 {
  18         const struct irq_ops *ops = irq_get_ops(dev);
  19
  20         if (!ops->route_pmc_gpio_gpe)
  21                 return -ENOSYS;
  22
  23         return ops->route_pmc_gpio_gpe(dev, pmc_gpe_num);
  24 }
  25
  26 int irq_set_polarity(struct udevice *dev, uint irq, bool active_low)
  27 {
  28         const struct irq_ops *ops = irq_get_ops(dev);
  29
  30         if (!ops->set_polarity)
  31                 return -ENOSYS;
  32
  33         return ops->set_polarity(dev, irq, active_low);
  34 }
  35
  36 int irq_snapshot_polarities(struct udevice *dev)
  37 {
  38         const struct irq_ops *ops = irq_get_ops(dev);
  39
  40         if (!ops->snapshot_polarities)
  41                 return -ENOSYS;
  42
  43         return ops->snapshot_polarities(dev);
  44 }
  45
  46 int irq_restore_polarities(struct udevice *dev)
  47 {
  48         const struct irq_ops *ops = irq_get_ops(dev);
  49
  50         if (!ops->restore_polarities)
  51                 return -ENOSYS;
  52
  53         return ops->restore_polarities(dev);
  54 }
  55
  56 int irq_read_and_clear(struct irq *irq)
  57 {
  58         const struct irq_ops *ops = irq_get_ops(irq->dev);
  59
  60         if (!ops->read_and_clear)
  61                 return -ENOSYS;
  62
  63         return ops->read_and_clear(irq);
  64 }
  65
  66 #if CONFIG_IS_ENABLED(OF_PLATDATA)
  67 int irq_get_by_driver_info(struct udevice *dev,
  68                            struct phandle_1_arg *cells, struct irq *irq)
  69 {
  70         int ret;
  71
  72         ret = device_get_by_driver_info(cells->node, &irq->dev);
  73         if (ret)
  74                 return ret;
  75         irq->id = cells->arg[0];
  76
  77         return 0;
  78 }
  79 #else
  80 static int irq_of_xlate_default(struct irq *irq,
  81                                 struct ofnode_phandle_args *args)
  82 {
  83         log_debug("(irq=%p)\n", irq);
  84
  85         if (args->args_count > 1) {
  86                 log_debug("Invaild args_count: %d\n", args->args_count);
  87                 return -EINVAL;
  88         }
  89
  90         if (args->args_count)
  91                 irq->id = args->args[0];
  92         else
  93                 irq->id = 0;
  94
  95         return 0;
  96 }
  97
  98 static int irq_get_by_index_tail(int ret, ofnode node,
  99                                  struct ofnode_phandle_args *args,
 100                                  const char *list_name, int index,
 101                                  struct irq *irq)
 102 {
 103         struct udevice *dev_irq;
 104         const struct irq_ops *ops;
 105
 106         assert(irq);
 107         irq->dev = NULL;
 108         if (ret)
 109                 goto err;
 110
 111         ret = uclass_get_device_by_ofnode(UCLASS_IRQ, args->node, &dev_irq);
 112         if (ret) {
 113                 log_debug("uclass_get_device_by_ofnode failed: err=%d\n", ret);
 114                 return ret;
 115         }
 116
 117         irq->dev = dev_irq;
 118
 119         ops = irq_get_ops(dev_irq);
 120
 121         if (ops->of_xlate)
 122                 ret = ops->of_xlate(irq, args);
 123         else
 124                 ret = irq_of_xlate_default(irq, args);
 125         if (ret) {
 126                 log_debug("of_xlate() failed: %d\n", ret);
 127                 return ret;
 128         }
 129
 130         return irq_request(dev_irq, irq);
 131 err:
 132         log_debug("Node '%s', property '%s', failed to request IRQ index %d: %d\n",
 133                   ofnode_get_name(node), list_name, index, ret);
 134         return ret;
 135 }
 136
 137 int irq_get_by_index(struct udevice *dev, int index, struct irq *irq)
 138 {
 139         struct ofnode_phandle_args args;
 140         int ret;
 141
 142         ret = dev_read_phandle_with_args(dev, "interrupts-extended",
 143                                          "#interrupt-cells", 0, index, &args);
 144
 145         return irq_get_by_index_tail(ret, dev_ofnode(dev), &args,
 146                                      "interrupts-extended", index > 0, irq);
 147 }
 148 #endif /* OF_PLATDATA */
 149
 150 int irq_request(struct udevice *dev, struct irq *irq)
 151 {
 152         const struct irq_ops *ops;
 153
 154         log_debug("(dev=%p, irq=%p)\n", dev, irq);
 155         if (!irq)
 156                 return 0;
 157         ops = irq_get_ops(dev);
 158
 159         irq->dev = dev;
 160
 161         if (!ops->request)
 162                 return 0;
 163
 164         return ops->request(irq);
 165 }
 166
 167 int irq_first_device_type(enum irq_dev_t type, struct udevice **devp)
 168 {
 169         int ret;
 170
 171         ret = uclass_first_device_drvdata(UCLASS_IRQ, type, devp);
 172         if (ret)
 173                 return log_msg_ret("find", ret);
 174
 175         return 0;
 176 }
 177
 178 UCLASS_DRIVER(irq) = {
 179         .id             = UCLASS_IRQ,
 180         .name           = "irq",
 181 };