On Mon, Sep 29, 2014 at 08:57:04PM -0600, Azael Avalos wrote:
> With the introduccion of the new keyboard backlight
> implementation, the *_timeout_store function is
> broken, as it only supports the first kbd_type.
>
> This patch adapt such function for the new kbd_type,
> as well as convert from using sscanf to kstrtoint.
>
> Signed-off-by: Azael Avalos <coproscefalo@xxxxxxxxx>
> ---
> drivers/platform/x86/toshiba_acpi.c | 33 +++++++++++++++++++++++++--------
> 1 file changed, 25 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c
> index 5d509ea..13ee56b 100644
> --- a/drivers/platform/x86/toshiba_acpi.c
> +++ b/drivers/platform/x86/toshiba_acpi.c
> @@ -1453,18 +1453,35 @@ static ssize_t toshiba_kbd_bl_timeout_store(struct device *dev,
> const char *buf, size_t count)
> {
> struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
> - int time = -1;
> + int time;
> + int ret;
> +
> + ret = kstrtoint(buf, 0, &time);
> + if (ret)
> + return ret;
>
> - if (sscanf(buf, "%i", &time) != 1 && (time < 0 || time > 60))
> + if (time < 1 || time > 60)
> return -EINVAL;
If I'm parsing this correctly, previously a time==0 was valid, and now it will
return -EINVAL. Is that intentional?
>
> - /* Set the Keyboard Backlight Timeout: 0-60 seconds */
> - if (time != -1 && toshiba->kbd_time != time) {
> + /* Set the Keyboard Backlight Timeout: 1-60 seconds */
So the time range change appears intentional. Why is that?
> +
> + /* Only make a change if the actual timeout has changed */
> + if (toshiba->kbd_time != time) {
> + /* Shift the time to "base time" (0x3c0000 == 60 seconds)*/
> time = time << HCI_MISC_SHIFT;
> - time = (toshiba->kbd_mode == SCI_KBD_MODE_AUTO) ?
> - time + 1 : time + 2;
> - if (toshiba_kbd_illum_status_set(toshiba, time) < 0)
> - return -EIO;
> + /* OR the "base time" to the actual method format */
> + if (toshiba->kbd_type == 1) {
> + /* Type 1 requires the oposite mode */
opposite
Is it "opposite" or "current"?
> + time |= SCI_KBD_MODE_FNZ;
> + } else if (toshiba->kbd_type == 2) {
> + /* Type 2 requires the actual mode */
actual... as in the mode you are changing to or the mode you are changing from?
>From the previous keyboard backlight type patch:
toshiba_acpi: Support new keyboard backlight type
There are several keyboard modes, why do we have only 2 of them here? Is it
because by setting the timeout we are always changing to _AUTO? Even if that's
the case, shouldn't one of these be OR'ing in the current mode - whatever it is,
instead of a fixed one?
> + time |= SCI_KBD_MODE_AUTO;
> + }
> +
> + ret = toshiba_kbd_illum_status_set(toshiba, time);
> + if (ret)
> + return ret;
> +
So here you are changing the sysfs API as you can now return -ENODEV in addition
to -EIO. We *can* do this, but it is a risk, and if a regression is reported, I
will be forced to revert this patch.
--
Darren Hart
Intel Open Source Technology Center
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