Hi,

On Fri, Mar 23, 2018 at 02:20:59PM -0600, Karthikeyan Ramasubramanian wrote:

This bus driver supports the GENI based i2c hardware controller in the
Qualcomm SOCs. The Qualcomm Generic Interface (GENI) is a programmable
module supporting a wide range of serial interfaces including I2C. The
driver supports FIFO mode and DMA mode of transfer and switches modes
dynamically depending on the size of the transfer.

Signed-off-by: Karthikeyan Ramasubramanian <redacted>
Signed-off-by: Sagar Dharia <redacted>
Signed-off-by: Girish Mahadevan <redacted>

Is one of these people interested in maintaining this driver? Then, an
entry for MAINTAINERS would be needed, too. (Same goes for
drivers/soc/qcom/ IMHO, but this is not my realm, so just saying)

+static const struct geni_i2c_err_log gi2c_log[] = {
+	[GP_IRQ0] = {-EINVAL, "Unknown I2C err GP_IRQ0"},
+	[NACK] = {-ENOTCONN, "NACK: slv unresponsive, check its power/reset-ln"},
+	[GP_IRQ2] = {-EINVAL, "Unknown I2C err GP IRQ2"},
+	[BUS_PROTO] = {-EPROTO, "Bus proto err, noisy/unepxected start/stop"},
+	[ARB_LOST] = {-EBUSY, "Bus arbitration lost, clock line undriveable"},
+	[GP_IRQ5] = {-EINVAL, "Unknown I2C err GP IRQ5"},
+	[GENI_OVERRUN] = {-EIO, "Cmd overrun, check GENI cmd-state machine"},
+	[GENI_ILLEGAL_CMD] = {-EILSEQ, "Illegal cmd, check GENI cmd-state machine"},
+	[GENI_ABORT_DONE] = {-ETIMEDOUT, "Abort after timeout successful"},
+	[GENI_TIMEOUT] = {-ETIMEDOUT, "I2C TXN timed out"},
+};

Please check Documentation/i2c/fault-codes for better -ERRNO values,
especially for NACK and ARB_LOST.

Rest looks good from a glimpse.

Thanks,

   Wolfram