backlight: add backlight type
There may be multiple ways of controlling the backlight on a given machine. Allow drivers to expose the type of interface they are providing, making it possible for userspace to make appropriate policy decisions. Signed-off-by: Matthew Garrett <mjg@redhat.com> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: David Airlie <airlied@linux.ie> Cc: Alex Deucher <alexdeucher@gmail.com> Cc: Ben Skeggs <bskeggs@redhat.com> Cc: Zhang Rui <rui.zhang@intel.com> Cc: Len Brown <lenb@kernel.org> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Linus Torvalds

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commit
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@@ -193,6 +193,7 @@ static int wm831x_backlight_probe(struct platform_device *pdev)
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data->current_brightness = 0;
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data->isink_reg = isink_reg;
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props.type = BACKLIGHT_RAW;
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props.max_brightness = max_isel;
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bl = backlight_device_register("wm831x", &pdev->dev, data,
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&wm831x_backlight_ops, &props);
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