i2c-smbus.h 1.7 KB

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  1. /*
  2. * i2c-smbus.h - SMBus extensions to the I2C protocol
  3. *
  4. * Copyright (C) 2010 Jean Delvare <khali@linux-fr.org>
  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; either version 2 of the License, or
  9. * (at your option) any later version.
  10. *
  11. * This program is distributed in the hope that it will be useful,
  12. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14. * GNU General Public License for more details.
  15. *
  16. * You should have received a copy of the GNU General Public License
  17. * along with this program; if not, write to the Free Software
  18. * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19. */
  20. #ifndef _LINUX_I2C_SMBUS_H
  21. #define _LINUX_I2C_SMBUS_H
  22. #include <linux/i2c.h>
  23. /**
  24. * i2c_smbus_alert_setup - platform data for the smbus_alert i2c client
  25. * @alert_edge_triggered: whether the alert interrupt is edge (1) or level (0)
  26. * triggered
  27. * @irq: IRQ number, if the smbus_alert driver should take care of interrupt
  28. * handling
  29. *
  30. * If irq is not specified, the smbus_alert driver doesn't take care of
  31. * interrupt handling. In that case it is up to the I2C bus driver to either
  32. * handle the interrupts or to poll for alerts.
  33. *
  34. * If irq is specified then it it crucial that alert_edge_triggered is
  35. * properly set.
  36. */
  37. struct i2c_smbus_alert_setup {
  38. unsigned int alert_edge_triggered:1;
  39. int irq;
  40. };
  41. struct i2c_client *i2c_setup_smbus_alert(struct i2c_adapter *adapter,
  42. struct i2c_smbus_alert_setup *setup);
  43. int i2c_handle_smbus_alert(struct i2c_client *ara);
  44. #endif /* _LINUX_I2C_SMBUS_H */