On 07-09-24, 00:44, Mukesh Kumar Savaliya wrote: > This Series adds support to share QUP (Qualcomm Unified peripheral) > based I2C SE (Serial Engine) controller between two subsystems. > Each subsystem should have its own dedicated GPII (General Purpose - > Interface Instance) acting as pipe between SE and GSI (Generic SW - > Interface) DMA HW engine. > > Subsystem must acquire Lock over the SE so that it gets uninterrupted > control till it unlocks the SE. It also makes sure the commonly shared > TLMM GPIOs are not touched which can impact other subsystem or cause > any interruption. Generally, GPIOs are being unconfigured during > suspend time. > > GSI DMA engine is capable to perform requested transfer operations > from any of the I2C client in a seamless way and its transparent to > the subsystems. Make sure to enable “qcom,shared-se” flag only while > enabling this feature. I2C client should add in its respective parent > node. > > Example : > Two clients from different SS can share an I2C SE for same slave device > OR their owned slave devices. > Assume I2C Slave EEPROM device connected with I2C controller. > Each client from ADSP SS and APPS Linux SS can perform i2c transactions. > This gets serialized by lock TRE + DMA Transfers + Unlock TRE at HW level. Where is the rest of the series, I see only this cover letter?? -- ~Vinod
