On Wed, Jun 12, 2013 at 07:56:25PM +1200, Tony Prisk wrote:
> This patch adds support for the I2C bus controllers found on Wondermedia
> 8xxx-series SoCs. Only master-mode is supported.
>
> Signed-off-by: Tony Prisk <linux@xxxxxxxxxxxxxxx>
> ---
Please describe here what changed since the last version. It's a lot
easier and faster to review then.
> +static int wmt_i2c_xfer(struct i2c_adapter *adap,
> + struct i2c_msg msgs[],
> + int num)
> +{
> + struct i2c_msg *pmsg;
> + int i, is_last, no_start;
> + int ret = 0;
> +
> + for (i = 0; ret >= 0 && i < num; i++) {
> + is_last = ((i + 1) == num);
> + no_start = (i != 0);
(i != 0) is a restart condition (start instead of stop)...
> +
> + pmsg = &msgs[i];
> + if (pmsg->flags & I2C_M_NOSTART)
> + no_start = 1;
...and this is a no_start (concatenating messages). I do have the
impression you are mixing those two?
> + if (pmsg->flags & I2C_M_RD)
> + ret = wmt_i2c_read(adap, pmsg, no_start, is_last);
> + else
> + ret = wmt_i2c_write(adap, pmsg, no_start, is_last);
> + }
> +
> + return (ret < 0) ? ret : i;
> +}
> + adap = &i2c_dev->adapter;
> + i2c_set_adapdata(adap, i2c_dev);
> + strlcpy(adap->name, "WMT I2C adapter", sizeof(adap->name));
> + adap->owner = THIS_MODULE;
> + adap->algo = &wmt_i2c_algo;
> + adap->dev.parent = &pdev->dev;
> + adap->dev.of_node = pdev->dev.of_node;
> + adap->nr = of_alias_get_id(pdev->dev.of_node, "i2c");
Drop this line...
> +
> + init_completion(&i2c_dev->complete);
> +
> + err = wmt_i2c_reset_hardware(i2c_dev);
> + if (err) {
> + dev_err(&pdev->dev, "error initializing hardware\n");
> + return err;
> + }
> +
> + err = i2c_add_numbered_adapter(adap);
... and use i2c_add_adpter here. Since recently the core checks the
ofnode for an alias. Sorry, forgot to mention this last time.
> + if (err) {
> + dev_err(&pdev->dev, "failed to add adapter\n");
> + return err;
> + }
> +
> + platform_set_drvdata(pdev, i2c_dev);
> +
> + of_i2c_register_devices(adap);
> +
> + return 0;
> +}
> +
> +module_platform_driver(wmt_i2c_driver);
> +
> +MODULE_DESCRIPTION("Wondermedia I2C master-mode bus adapter");
> +MODULE_AUTHOR("Tony Prisk <linux@xxxxxxxxxxxxxxx>");
> +MODULE_LICENSE("GPL and additional rights");
I see no additional rights mentioned. According to the header "GPL"
should do, but you know the original sources better.
> +MODULE_DEVICE_TABLE(of, wmt_i2c_dt_ids);
> --
> 1.7.9.5
>
Regards,
Wolfram
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