src/mainboard/google/kahlee/variants/careena/mainboard.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <ec/google/chromeec/ec.h>
   4 #include <baseboard/variants.h>
   5 #include <variant/sku.h>
   6 #include <string.h>
   7 #include <drivers/i2c/hid/chip.h>
   8
   9 extern struct chip_operations drivers_i2c_generic_ops;
  10 extern struct chip_operations drivers_i2c_da7219_ops;
  11
  12 void variant_devtree_update(void)
  13 {
  14         uint32_t sku = google_chromeec_get_sku_id();
  15         struct device *mmio_dev = NULL, *child = NULL;
  16         struct device *alc_dev = NULL, *da7219_dev = NULL;
  17
  18         while (1) {
  19                 mmio_dev = dev_find_path(mmio_dev, DEVICE_PATH_MMIO);
  20                 if (mmio_dev == NULL)
  21                         break;
  22                 if (mmio_dev->path.mmio.addr == 0xfedc2000)
  23                         break;
  24         }
  25
  26         if (mmio_dev == NULL)
  27                 return;
  28
  29         while ((child = dev_bus_each_child(mmio_dev->downstream, child)) != NULL) {
  30                 if (child->path.type != DEVICE_PATH_I2C)
  31                         continue;
  32                 if (child->path.i2c.device != 0x1a)
  33                         continue;
  34                 if (child->chip_ops == &drivers_i2c_generic_ops) {
  35                         struct drivers_i2c_generic_config *config = child->chip_info;
  36                         if (!strcmp(config->hid, "10EC5682"))
  37                                 alc_dev = child;
  38                 } else if (child->chip_ops == &drivers_i2c_da7219_ops) {
  39                         da7219_dev = child;
  40                 }
  41         }
  42
  43         switch (sku) {
  44         default:
  45                 /* da7219 only */
  46                 if (da7219_dev)
  47                         da7219_dev->enabled = 1;
  48                 if (alc_dev)
  49                         alc_dev->enabled = 0;
  50                 break;
  51         case SKU_BARLA_ALC5682_44:
  52         case SKU_BARLA_ALC5682_45:
  53         case SKU_BARLA_ALC5682_46:
  54         case SKU_BARLA_ALC5682_47:
  55                 /* alc5682 only */
  56                 if (da7219_dev)
  57                         da7219_dev->enabled = 0;
  58                 if (alc_dev)
  59                         alc_dev->enabled = 1;
  60                 break;
  61         }
  62 }