diff options
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/misc/wistron_btns.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/drivers/input/misc/wistron_btns.c b/drivers/input/misc/wistron_btns.c index 961aad7a047..320262aa4c1 100644 --- a/drivers/input/misc/wistron_btns.c +++ b/drivers/input/misc/wistron_btns.c @@ -22,6 +22,7 @@ #include <linux/init.h> #include <linux/input.h> #include <linux/interrupt.h> +#include <linux/jiffies.h> #include <linux/kernel.h> #include <linux/mc146818rtc.h> #include <linux/module.h> @@ -37,9 +38,10 @@ */ #define MAX_POLL_ITERATIONS 64 -#define POLL_FREQUENCY 10 /* Number of polls per second */ +#define POLL_FREQUENCY 2 /* Number of polls per second when idle */ +#define POLL_FREQUENCY_BURST 10 /* Polls per second when a key was recently pressed */ -#if POLL_FREQUENCY > HZ +#if POLL_FREQUENCY_BURST > HZ #error "POLL_FREQUENCY too high" #endif @@ -1079,6 +1081,8 @@ static void handle_key(u8 code) static void poll_bios(unsigned long discard) { + static unsigned long jiffies_last_press; + unsigned long jiffies_now = jiffies; u8 qlen; u16 val; @@ -1087,11 +1091,17 @@ static void poll_bios(unsigned long discard) if (qlen == 0) break; val = bios_pop_queue(); - if (val != 0 && !discard) + if (val != 0 && !discard) { handle_key((u8)val); + jiffies_last_press = jiffies_now; + } } - mod_timer(&poll_timer, jiffies + HZ / POLL_FREQUENCY); + /* Increase precision if user is currently pressing keys (< 2s ago) */ + if (time_after(jiffies_last_press, jiffies_now - (HZ * 2))) + mod_timer(&poll_timer, jiffies_now + HZ / POLL_FREQUENCY_BURST); + else + mod_timer(&poll_timer, jiffies_now + HZ / POLL_FREQUENCY); } static int __devinit wistron_probe(struct platform_device *dev) |