Thanks for the tip. I attempted to see if the register was implemented on the i.mx6, and it doesn't appear to be. I'll reach out to my FAE. I found the datasheet and the register definitely isn't documented there.
I was thinking of a patch that would keep track of state, and synthesize the I2C_SLAVE_STOP on the next interrupt if it was a new transaction. Does this seem too hacky to you? What are your thoughts? Thanks, Kevin Thanks, Kevin On Wed, Dec 9, 2020 at 6:16 PM Biwen Li <[email protected]> wrote: > > Hi Kevin, > > > > After enabling idle interrupts, the i2c register will generate an idle > interrupts(whatever read or write) when i2c bus enter idle status. Then get > I2C_SLAVE_STOP event. > > But don’t have the IBIC register(Maybe it’s a hidden register) in imx. You > can query about the AE of imx about this. > > static void i2c_imx_enable_bus_idle(struct imx_i2c_struct *i2c_imx) > > { > > if (is_vf610_i2c(i2c_imx)) { > > unsigned int temp; > > > > temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_IBIC); > > temp |= IBIC_BIIE; > > imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_IBIC); > > } > > } > > > > Best Regards, > > Biwen Li > > From: Kevin Herbert <[email protected]> > Sent: 2020年12月10日 1:18 > To: Wolfram Sang <[email protected]>; Kevin Herbert > <[email protected]>; Biwen Li (OSS) <[email protected]>; Leo Li > <[email protected]>; [email protected]; [email protected]; > [email protected]; [email protected]; [email protected]; Aisheng Dong > <[email protected]>; Clark Wang <[email protected]>; > [email protected]; [email protected]; > [email protected]; Jiafei Pan <[email protected]>; Xiaobo Xie > <[email protected]>; [email protected]; Biwen Li > <[email protected]> > Subject: [EXT] Re: [v10] i2c: imx: support slave mode for imx I2C driver > > > > Caution: EXT Email > > Even on an operation like writing a byte, I get I2C_SLAVE_WRITE_REQUESTED > followed by I2C_SLAVE_WRITE_RECEIVED, but no I2C_SLAVE_STOP. If I do a I2C > write of multiple bytes, I get I2c_SLAVE_WRITE_REQUESTED followed by multiple > I2C_SLAVE_WRITE_RECEIVED. > > > > Kevin > > > > On Wed, Dec 9, 2020 at 9:10 AM Wolfram Sang <[email protected]> wrote: > > On Wed, Dec 09, 2020 at 09:03:50AM -0800, Kevin Herbert wrote: > > What is the protocol for the I2C_SLAVE_STOP event? I am working on my own > > backend, and I've only tried it with this i.mx driver, and I do not receive > > I2C_SLAVE_STOP at the end of every I2C transaction. It was my expectation > > I'd receive this event at the end of every frame. In my testing, I've never > > received this event at all. > > > > Where are the I2C registers on the i.mx documented? My board is an i.mx6sx. > > Hmm, from a glimpse, it looks the STOP event is only sent after a write > and not after a read? Does this match your findings?
