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 <dm/device-internal.h>
  14
  15 int irq_route_pmc_gpio_gpe(struct udevice *dev, uint pmc_gpe_num)
  16 {
  17         const struct irq_ops *ops = irq_get_ops(dev);
  18
  19         if (!ops->route_pmc_gpio_gpe)
  20                 return -ENOSYS;
  21
  22         return ops->route_pmc_gpio_gpe(dev, pmc_gpe_num);
  23 }
  24
  25 int irq_set_polarity(struct udevice *dev, uint irq, bool active_low)
  26 {
  27         const struct irq_ops *ops = irq_get_ops(dev);
  28
  29         if (!ops->set_polarity)
  30                 return -ENOSYS;
  31
  32         return ops->set_polarity(dev, irq, active_low);
  33 }
  34
  35 int irq_snapshot_polarities(struct udevice *dev)
  36 {
  37         const struct irq_ops *ops = irq_get_ops(dev);
  38
  39         if (!ops->snapshot_polarities)
  40                 return -ENOSYS;
  41
  42         return ops->snapshot_polarities(dev);
  43 }
  44
  45 int irq_restore_polarities(struct udevice *dev)
  46 {
  47         const struct irq_ops *ops = irq_get_ops(dev);
  48
  49         if (!ops->restore_polarities)
  50                 return -ENOSYS;
  51
  52         return ops->restore_polarities(dev);
  53 }
  54
  55 int irq_read_and_clear(struct irq *irq)
  56 {
  57         const struct irq_ops *ops = irq_get_ops(irq->dev);
  58
  59         if (!ops->read_and_clear)
  60                 return -ENOSYS;
  61
  62         return ops->read_and_clear(irq);
  63 }
  64
  65 #if CONFIG_IS_ENABLED(OF_PLATDATA)
  66 int irq_get_by_index_platdata(struct udevice *dev, int index,
  67                               struct phandle_1_arg *cells, struct irq *irq)
  68 {
  69         int ret;
  70
  71         if (index != 0)
  72                 return -ENOSYS;
  73         ret = uclass_get_device(UCLASS_IRQ, 0, &irq->dev);
  74         if (ret)
  75                 return ret;
  76         irq->id = cells[0].arg[0];
  77
  78         return 0;
  79 }
  80 #else
  81 static int irq_of_xlate_default(struct irq *irq,
  82                                 struct ofnode_phandle_args *args)
  83 {
  84         log_debug("(irq=%p)\n", irq);
  85
  86         if (args->args_count > 1) {
  87                 log_debug("Invaild args_count: %d\n", args->args_count);
  88                 return -EINVAL;
  89         }
  90
  91         if (args->args_count)
  92                 irq->id = args->args[0];
  93         else
  94                 irq->id = 0;
  95
  96         return 0;
  97 }
  98
  99 static int irq_get_by_index_tail(int ret, ofnode node,
 100                                  struct ofnode_phandle_args *args,
 101                                  const char *list_name, int index,
 102                                  struct irq *irq)
 103 {
 104         struct udevice *dev_irq;
 105         const struct irq_ops *ops;
 106
 107         assert(irq);
 108         irq->dev = NULL;
 109         if (ret)
 110                 goto err;
 111
 112         ret = uclass_get_device_by_ofnode(UCLASS_IRQ, args->node, &dev_irq);
 113         if (ret) {
 114                 log_debug("uclass_get_device_by_ofnode failed: err=%d\n", ret);
 115                 return ret;
 116         }
 117
 118         irq->dev = dev_irq;
 119
 120         ops = irq_get_ops(dev_irq);
 121
 122         if (ops->of_xlate)
 123                 ret = ops->of_xlate(irq, args);
 124         else
 125                 ret = irq_of_xlate_default(irq, args);
 126         if (ret) {
 127                 log_debug("of_xlate() failed: %d\n", ret);
 128                 return ret;
 129         }
 130
 131         return irq_request(dev_irq, irq);
 132 err:
 133         log_debug("Node '%s', property '%s', failed to request IRQ index %d: %d\n",
 134                   ofnode_get_name(node), list_name, index, ret);
 135         return ret;
 136 }
 137
 138 int irq_get_by_index(struct udevice *dev, int index, struct irq *irq)
 139 {
 140         struct ofnode_phandle_args args;
 141         int ret;
 142
 143         ret = dev_read_phandle_with_args(dev, "interrupts-extended",
 144                                          "#interrupt-cells", 0, index, &args);
 145
 146         return irq_get_by_index_tail(ret, dev_ofnode(dev), &args,
 147                                      "interrupts-extended", index > 0, irq);
 148 }
 149 #endif /* OF_PLATDATA */
 150
 151 int irq_request(struct udevice *dev, struct irq *irq)
 152 {
 153         const struct irq_ops *ops;
 154
 155         log_debug("(dev=%p, irq=%p)\n", dev, irq);
 156         if (!irq)
 157                 return 0;
 158         ops = irq_get_ops(dev);
 159
 160         irq->dev = dev;
 161
 162         if (!ops->request)
 163                 return 0;
 164
 165         return ops->request(irq);
 166 }
 167
 168 int irq_first_device_type(enum irq_dev_t type, struct udevice **devp)
 169 {
 170         int ret;
 171
 172         ret = uclass_first_device_drvdata(UCLASS_IRQ, type, devp);
 173         if (ret)
 174                 return log_msg_ret("find", ret);
 175
 176         return 0;
 177 }
 178
 179 UCLASS_DRIVER(irq) = {
 180         .id             = UCLASS_IRQ,
 181         .name           = "irq",
 182 };