diff options
| -rw-r--r-- | src/mainboard/google/octopus/variants/phaser/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/mainboard/google/octopus/variants/phaser/variant.c | 73 |
2 files changed, 74 insertions, 0 deletions
diff --git a/src/mainboard/google/octopus/variants/phaser/Makefile.inc b/src/mainboard/google/octopus/variants/phaser/Makefile.inc new file mode 100644 index 0000000000..1644083954 --- /dev/null +++ b/src/mainboard/google/octopus/variants/phaser/Makefile.inc @@ -0,0 +1 @@ +ramstage-y += variant.c diff --git a/src/mainboard/google/octopus/variants/phaser/variant.c b/src/mainboard/google/octopus/variants/phaser/variant.c new file mode 100644 index 0000000000..1ead5e230c --- /dev/null +++ b/src/mainboard/google/octopus/variants/phaser/variant.c @@ -0,0 +1,73 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2018 Google LLC. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <arch/acpi_device.h> +#include <baseboard/variants.h> +#include <boardid.h> +#include <device/device.h> +#include <drivers/i2c/generic/chip.h> +#include <drivers/i2c/hid/chip.h> +#include <soc/gpio.h> +#include <soc/pci_devs.h> +#include <string.h> + +extern struct chip_operations drivers_i2c_generic_ops; +extern struct chip_operations drivers_i2c_hid_ops; + +void variant_update_devtree(struct device *dev) +{ + uint32_t bid; + struct device *touchscreen_i2c_host; + struct device *child; + const struct bus *children_bus; + static const struct acpi_gpio new_enable_gpio = + ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_146); + + bid = board_id(); + + /* Nothing to update. */ + if (bid == UNDEFINED_STRAPPING_ID || bid < 1) + return; + + touchscreen_i2c_host = dev_find_slot(0, PCH_DEVFN_I2C7); + + if (touchscreen_i2c_host == NULL) + return; + + children_bus = touchscreen_i2c_host->link_list; + child = NULL; + + /* Find all children on bus to update touchscreen enable gpio. */ + while ((child = dev_bus_each_child(children_bus, child)) != NULL) { + struct drivers_i2c_generic_config *cfg; + + /* No configration to change. */ + if (child->chip_info == NULL) + continue; + + if (child->chip_ops == &drivers_i2c_generic_ops) + cfg = child->chip_info; + else if (child->chip_ops == &drivers_i2c_hid_ops) { + struct drivers_i2c_hid_config *hid_cfg; + hid_cfg = child->chip_info; + cfg = &hid_cfg->generic; + } else + continue; + + /* Update the enable gpio. */ + memcpy(&cfg->enable_gpio, &new_enable_gpio, + sizeof(new_enable_gpio)); + } +} |