On Wed, Sep 11, 2024 at 10:32:30PM +0530, Vinod Koul wrote: > 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?? > Something went wrong sending the series. Here is the resend: https://lore.kernel.org/all/20240906191438.4104329-1-quic_msavaliy@xxxxxxxxxxx/ regards, dan carpenter
