On 07/31/2015 02:00 PM, Robert ABEL wrote:
> CONFIG_I2C_XILINX_ERRATA makes resetting XIIC after every
> Master Transmit error configurable.
> Also mention proper module name for XIIC kernel module.
Datasheet? version.
>
> Signed-off-by: Robert ABEL <rabel@xxxxxxxxxxxxxxxxxxxxxxx>
> ---
> drivers/i2c/busses/Kconfig | 9 ++++++++-
> drivers/i2c/busses/i2c-xiic.c | 9 +++++++++
> 2 files changed, 17 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
> index 46d5488..3255e89 100644
> --- a/drivers/i2c/busses/Kconfig
> +++ b/drivers/i2c/busses/Kconfig
> @@ -886,7 +886,14 @@ config I2C_XILINX
> Xilinx I2C controller.
>
> This driver can also be built as a module. If so, the module
> - will be called xilinx_i2c.
> + will be called i2c-xiic.
> +
> +config I2C_XILINX_ERRATA
> + bool "Reset on "
> + depends on I2C_XILINX
> + help
> + By enabling this option, the Xilinx I2C Controller will be reset
> + after Master Transmit Errors.
>
> config I2C_XLR
> tristate "XLR I2C support"
> diff --git a/drivers/i2c/busses/i2c-xiic.c b/drivers/i2c/busses/i2c-xiic.c
> index 5c9897e..6a834bc 100644
> --- a/drivers/i2c/busses/i2c-xiic.c
> +++ b/drivers/i2c/busses/i2c-xiic.c
> @@ -509,6 +509,15 @@ static irqreturn_t xiic_process(int irq, void *dev_id)
> break;
> }
>
> +#if defined(CONFIG_I2C_XILINX_ERRATA)
> + if (!(msg->flags & I2C_M_RD)) {
> + /* dynamic mode seem to suffer from problems if we just flush
> + * fifos and the next message is a TX with len 0 (only addr)
> + * reset the IP instead of just flushing fifos
> + */
> + xiic_reinit(i2c);
> + }
> +#endif
> }
>
> /* Receive FIFO is full */
>
Make it DT configurable.
Thanks,
Michal
--
To unsubscribe from this list: send the line "unsubscribe linux-i2c" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
