On 6 December 2015 at 00:27, Sebastian Reichel <s...@kernel.org> wrote:
> Hi,
>
> On Mon, Nov 16, 2015 at 02:33:31PM +0800, Baolin Wang wrote:
>> +static ssize_t cur_limit_show(struct device *dev,
>> + struct device_attribute *attr,
>> + char *buf)
>> +{
>> + struct usb_charger *uchger = dev_to_uchger(dev);
>> +
>> + return scnprintf(buf, PAGE_SIZE, "%d %d %d %d\n",
>> + uchger->cur_limit.sdp_cur_limit,
>> + uchger->cur_limit.dcp_cur_limit,
>> + uchger->cur_limit.cdp_cur_limit,
>> + uchger->cur_limit.aca_cur_limit);
>> +}
>> +
>> +static ssize_t cur_limit_store(struct device *dev,
>> + struct device_attribute *attr,
>> + const char *buf, size_t count)
>> +{
>> + struct usb_charger *uchger = dev_to_uchger(dev);
>> + struct usb_charger_cur_limit cur;
>> + int ret;
>> +
>> + ret = sscanf(buf, "%d %d %d %d",
>> + &cur.sdp_cur_limit, &cur.dcp_cur_limit,
>> + &cur.cdp_cur_limit, &cur.aca_cur_limit);
>> + if (ret == 0)
>> + return -EINVAL;
>> +
>> + ret = usb_charger_set_cur_limit(uchger, &cur);
>> + if (ret < 0)
>> + return ret;
>> +
>> + return count;
>> +}
>> +static DEVICE_ATTR_RW(cur_limit);
>
> I think this functionality should be provided with one file per
> type. This makes it easier to parse the values from userspace
> and makes it possible to extend the frameworks functionality
> (e.g. when new types are added in a newer revision of the USB
> standard).
>
That sounds reasonable and I'll change that. Thanks.
> -- Sebastian
--
Baolin.wang
Best Regards
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