src/drivers/i2c/alps/alps.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2016 Intel Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <arch/acpigen_dsm.h>
  17 #include <device/device.h>
  18 #include <stdint.h>
  19 #include "chip.h"
  20
  21 static void i2c_alps_fill_dsm(struct device *dev)
  22 {
  23         struct drivers_i2c_alps_config *config = dev->chip_info;
  24         struct dsm_i2c_hid_config dsm_config = {
  25                 .hid_desc_reg_offset = config->hid_desc_reg_offset,
  26         };
  27
  28         acpigen_write_dsm_i2c_hid(&dsm_config);
  29 }
  30
  31 static void i2c_alps_fill_ssdt_generator(struct device *dev)
  32 {
  33         struct drivers_i2c_alps_config *config = dev->chip_info;
  34         i2c_generic_fill_ssdt(dev, &i2c_alps_fill_dsm, &config->generic);
  35 }
  36
  37 static const char *i2c_alps_acpi_name(const struct device *dev)
  38 {
  39         return "ALPS";
  40 }
  41
  42 static struct device_operations i2c_alps_ops = {
  43         .read_resources           = DEVICE_NOOP,
  44         .set_resources            = DEVICE_NOOP,
  45         .enable_resources         = DEVICE_NOOP,
  46 #if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
  47         .acpi_name                = &i2c_alps_acpi_name,
  48         .acpi_fill_ssdt_generator = &i2c_alps_fill_ssdt_generator,
  49 #endif
  50 };
  51
  52 static void i2c_alps_enable(struct device *dev)
  53 {
  54         dev->ops = &i2c_alps_ops;
  55 }
  56
  57 struct chip_operations drivers_i2c_alps_ops = {
  58         CHIP_NAME("ALPS I2C Device")
  59         .enable_dev = &i2c_alps_enable
  60 };