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 <string>

#include "boost/filesystem.hpp"  // NOLINT: boost::filesystem is commonly used in BMC
#include "hal_common_config.pb.h"
#include "tlbmc/hal/sysfs/hwmon.h"

namespace milotic_tlbmc {

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

// The class is thread-safe.
class I2cSysfs : public HwmonSysfs {
 public:
  // Default constructor for unit tests.
  I2cSysfs() : I2cSysfs(I2cSysfsConfig()) {}

  explicit I2cSysfs(const I2cSysfsConfig& config) : config_(config) {}

  virtual ~I2cSysfs() = default;

  boost::filesystem::path GetBusPath(uint64_t bus) const override;

  std::string GetDeviceDirectoryName(
      const HalCommonConfig& config) const override;

  bool IsDevicePresent(const HalCommonConfig& config) const override;

  std::string GetI2cSysfsPath() const { return config_.i2c_sysfs_path; }

 private:
  const I2cSysfsConfig config_;
};

}  // namespace milotic_tlbmc

#endif  // THIRD_PARTY_MILOTIC_EXTERNAL_CC_TLBMC_HAL_SYSFS_I2C_H_