Messages in this thread | | | Date | Fri, 30 Aug 2019 14:56:26 +0200 | From | Wolfram Sang <> | Subject | Re: [PATCH v1 1/1] i2c: iproc: Add i2c repeated start capability |
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Hi everyone,
> +/* > + * If 'process_call' is true, then this is a multi-msg transfer that requires > + * a repeated start between the messages. > + * More specifically, it must be a write (reg) followed by a read (data). > + * The i2c quirks are set to enforce this rule. > + */
With all the limitations in place, I wonder if it might be easier to implement an smbus_xfer callback instead? What is left that makes this controller more than SMBus and real I2C?
> + /* Process the read message if this is process call */
Also, the term "process call" here seriously sounds like SMBus.
> + addr = msg->addr << 1 | 1;
addr = i2c_8bit_addr_from_msg(msg);
> + u32 protocol;
Hmm, another SMBus terminology.
> + if (num > 2) { > + dev_err(iproc_i2c->device, > + "Only support up to 2 messages. Current msg count %d\n", > + num); > + return -EOPNOTSUPP; > + }
With your quirks flags set, the core checks it for you.
Kind regards,
Wolfram
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