mainboard.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <ec/google/chromeec/ec.h>
#include <baseboard/variants.h>
#include <variant/sku.h>
#include <string.h>
#include <drivers/i2c/hid/chip.h>
 
extern struct chip_operations drivers_i2c_generic_ops;
extern struct chip_operations drivers_i2c_da7219_ops;
 
void variant_devtree_update(void)
{
        uint32_t sku = google_chromeec_get_sku_id();
        struct device *mmio_dev = NULL, *child = NULL;
        struct device *alc_dev = NULL, *da7219_dev = NULL;
 
        while (1) {
                mmio_dev = dev_find_path(mmio_dev, DEVICE_PATH_MMIO);
                if (mmio_dev == NULL)
                        break;
                if (mmio_dev->path.mmio.addr == 0xfedc2000)
                        break;
        }
 
        if (mmio_dev == NULL)
                return;
 
        while ((child = dev_bus_each_child(mmio_dev->link_list, child)) != NULL) {
                if (child->path.type != DEVICE_PATH_I2C)
                        continue;
                if (child->path.i2c.device != 0x1a)
                        continue;
                if (child->chip_ops == &drivers_i2c_generic_ops) {
                        struct drivers_i2c_generic_config *config = child->chip_info;
                        if (!strcmp(config->hid, "10EC5682"))
                                alc_dev = child;
                } else if (child->chip_ops == &drivers_i2c_da7219_ops) {
                        da7219_dev = child;
                }
        }
 
        switch (sku) {
        default:
                /* da7219 only */
                if (da7219_dev)
                        da7219_dev->enabled = 1;
                if (alc_dev)
                        alc_dev->enabled = 0;
                break;
        case SKU_BARLA_ALC5682_44:
        case SKU_BARLA_ALC5682_45:
        case SKU_BARLA_ALC5682_46:
        case SKU_BARLA_ALC5682_47:
                /* alc5682 only */
                if (da7219_dev)
                        da7219_dev->enabled = 0;
                if (alc_dev)
                        alc_dev->enabled = 1;
                break;
        }
}