src/devices/board/drivers/nelson/nelson-light.cc

// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <ddk/binding.h>
#include <ddk/debug.h>
#include <ddk/device.h>
#include <ddk/metadata.h>
#include <ddk/platform-defs.h>
#include <ddk/protocol/platform/bus.h>
#include <ddktl/metadata/light-sensor.h>
#include <soc/aml-s905d2/s905d2-gpio.h>

#include "nelson-gpios.h"
#include "nelson.h"

namespace nelson {

// Composite binding rules for focaltech touch driver.
static const zx_bind_inst_t root_match[] = {
    BI_MATCH(),
};

const zx_bind_inst_t i2c_match[] = {
    BI_ABORT_IF(NE, BIND_PROTOCOL, ZX_PROTOCOL_I2C),
    BI_ABORT_IF(NE, BIND_I2C_BUS_ID, NELSON_I2C_A0_0),
    BI_MATCH_IF(EQ, BIND_I2C_ADDRESS, I2C_AMBIENTLIGHT_ADDR),
};

static const zx_bind_inst_t gpio_match[] = {
    BI_ABORT_IF(NE, BIND_PROTOCOL, ZX_PROTOCOL_GPIO),
    BI_MATCH_IF(EQ, BIND_GPIO_PIN, GPIO_LIGHT_INTERRUPT),
};

static const device_fragment_part_t i2c_fragment[] = {
    {countof(root_match), root_match},
    {countof(i2c_match), i2c_match},
};

static const device_fragment_part_t gpio_fragment[] = {
    {countof(root_match), root_match},
    {countof(gpio_match), gpio_match},
};

static const device_fragment_t fragments[] = {
    {countof(i2c_fragment), i2c_fragment},
    {countof(gpio_fragment), gpio_fragment},
};

zx_status_t Nelson::LightInit() {
  metadata::LightSensorParams params = {};
  // TODO(kpt): Insert the right parameters here.
  params.integration_time_ms = 615;
  params.gain = 16;
  device_metadata_t metadata[] = {
      {
          .type = DEVICE_METADATA_PRIVATE,
          .data = &params,
          .length = sizeof(params),
      },
  };
  constexpr zx_device_prop_t props[] = {
      {BIND_PLATFORM_DEV_VID, 0, PDEV_VID_AMS},
      {BIND_PLATFORM_DEV_PID, 0, PDEV_PID_AMS_TCS3400},
      {BIND_PLATFORM_DEV_DID, 0, PDEV_DID_AMS_LIGHT},
  };

  const composite_device_desc_t comp_desc = {
      .props = props,
      .props_count = countof(props),
      .fragments = fragments,
      .fragments_count = countof(fragments),
      .coresident_device_index = UINT32_MAX,
      .metadata_list = metadata,
      .metadata_count = countof(metadata),
  };

  zx_status_t status = DdkAddComposite("tcs3400-light", &comp_desc);
  if (status != ZX_OK) {
    zxlogf(ERROR, "%s(tcs-3400): DdkAddComposite failed: %d", __func__, status);
    return status;
  }

  return ZX_OK;
}

}  // namespace nelson