tlbmc/hal/sysfs/i2c.h

#ifndef THIRD_PARTY_MILOTIC_EXTERNAL_CC_TLBMC_HAL_SYSFS_I2C_H_
#define THIRD_PARTY_MILOTIC_EXTERNAL_CC_TLBMC_HAL_SYSFS_I2C_H_

#include <cstdint>
#include <filesystem>  // NOLINT: filesystem is available on BMC
#include <string>
#include <string_view>

#include "absl/status/status.h"
#include "boost/filesystem.hpp"  // NOLINT: boost::filesystem is commonly used in BMC
#include "i2c_common_config.pb.h"

namespace milotic_tlbmc {

struct I2cSysfsConfig {
  std::string i2c_sysfs_path = "/sys/bus/i2c/devices/";
};

// The class is thread-safe.
class I2cSysfs {
 public:
  explicit I2cSysfs(const I2cSysfsConfig& config) : config_(config) {}

  virtual ~I2cSysfs() = default;

  boost::filesystem::path Geti2cBusPath(uint64_t bus) const;

  static std::string GetDeviceDirectoryName(const I2cCommonConfig& config);

  virtual absl::Status NewDevice(const I2cCommonConfig& config,
                         std::string_view driver_name) const;

  virtual absl::Status DeleteDevice(const I2cCommonConfig& config) const;

  bool IsDevicePresent(const I2cCommonConfig& config) const;

 private:
  const I2cSysfsConfig config_;
};

}  // namespace milotic_tlbmc

#endif  // THIRD_PARTY_MILOTIC_EXTERNAL_CC_TLBMC_HAL_SYSFS_I2C_H_