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path: root/drivers/hid/wacom.h
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Diffstat (limited to 'drivers/hid/wacom.h')
-rw-r--r--drivers/hid/wacom.h10
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/hid/wacom.h b/drivers/hid/wacom.h
index 77c5fb26cd14..1deacb4568cb 100644
--- a/drivers/hid/wacom.h
+++ b/drivers/hid/wacom.h
@@ -89,7 +89,7 @@
#include <linux/usb/input.h>
#include <linux/power_supply.h>
#include <linux/timer.h>
-#include <asm/unaligned.h>
+#include <linux/unaligned.h>
/*
* Version Information
@@ -218,6 +218,14 @@ static inline __u32 wacom_s32tou(s32 value, __u8 n)
return value & (1 << (n - 1)) ? value & (~(~0U << n)) : value;
}
+static inline u32 wacom_rescale(u32 value, u32 in_max, u32 out_max)
+{
+ if (in_max == 0 || out_max == 0)
+ return 0;
+ value = clamp(value, 0, in_max);
+ return DIV_ROUND_CLOSEST(value * out_max, in_max);
+}
+
extern const struct hid_device_id wacom_ids[];
void wacom_wac_irq(struct wacom_wac *wacom_wac, size_t len);