162306a36Sopenharmony_ci====================== 262306a36Sopenharmony_ciKernel driver i2c-ismt 362306a36Sopenharmony_ci====================== 462306a36Sopenharmony_ci 562306a36Sopenharmony_ci 662306a36Sopenharmony_ciSupported adapters: 762306a36Sopenharmony_ci * Intel S12xx series SOCs 862306a36Sopenharmony_ci 962306a36Sopenharmony_ciAuthors: 1062306a36Sopenharmony_ci Bill Brown <bill.e.brown@intel.com> 1162306a36Sopenharmony_ci 1262306a36Sopenharmony_ci 1362306a36Sopenharmony_ciModule Parameters 1462306a36Sopenharmony_ci----------------- 1562306a36Sopenharmony_ci 1662306a36Sopenharmony_ci* bus_speed (unsigned int) 1762306a36Sopenharmony_ci 1862306a36Sopenharmony_ciAllows changing of the bus speed. Normally, the bus speed is set by the BIOS 1962306a36Sopenharmony_ciand never needs to be changed. However, some SMBus analyzers are too slow for 2062306a36Sopenharmony_cimonitoring the bus during debug, thus the need for this module parameter. 2162306a36Sopenharmony_ciSpecify the bus speed in kHz. 2262306a36Sopenharmony_ci 2362306a36Sopenharmony_ciAvailable bus frequency settings: 2462306a36Sopenharmony_ci 2562306a36Sopenharmony_ci ==== ========= 2662306a36Sopenharmony_ci 0 no change 2762306a36Sopenharmony_ci 80 kHz 2862306a36Sopenharmony_ci 100 kHz 2962306a36Sopenharmony_ci 400 kHz 3062306a36Sopenharmony_ci 1000 kHz 3162306a36Sopenharmony_ci ==== ========= 3262306a36Sopenharmony_ci 3362306a36Sopenharmony_ci 3462306a36Sopenharmony_ciDescription 3562306a36Sopenharmony_ci----------- 3662306a36Sopenharmony_ci 3762306a36Sopenharmony_ciThe S12xx series of SOCs have a pair of integrated SMBus 2.0 controllers 3862306a36Sopenharmony_citargeted primarily at the microserver and storage markets. 3962306a36Sopenharmony_ci 4062306a36Sopenharmony_ciThe S12xx series contain a pair of PCI functions. An output of lspci will show 4162306a36Sopenharmony_cisomething similar to the following:: 4262306a36Sopenharmony_ci 4362306a36Sopenharmony_ci 00:13.0 System peripheral: Intel Corporation Centerton SMBus 2.0 Controller 0 4462306a36Sopenharmony_ci 00:13.1 System peripheral: Intel Corporation Centerton SMBus 2.0 Controller 1 45