Input: tegra-kbc - fix computation of polling time

Fix a constant definition and computation of polling time.

[dtor@mail.ru: switched to using DIV_ROUND_UP as was suggested by
 Thierry Reding <thierry.reding@avionic-design.de>]

Signed-off-by: Rakesh Iyer <riyer@nvidia.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

diff --git a/drivers/input/keyboard/tegra-kbc.c b/drivers/input/keyboard/tegra-kbc.c
index da3828f..f270447 100644 (file)
--- a/drivers/input/keyboard/tegra-kbc.c
+++ b/drivers/input/keyboard/tegra-kbc.c
@@ -19,6 +19,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  */
 
+#include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/input.h>
 #include <linux/platform_device.h>
@@ -37,7 +38,7 @@
 #define KBC_ROW_SCAN_DLY       5
 
 /* KBC uses a 32KHz clock so a cycle = 1/32Khz */
-#define KBC_CYCLE_USEC 32
+#define KBC_CYCLE_MS   32
 
 /* KBC Registers */
 
@@ -647,7 +648,7 @@ static int __devinit tegra_kbc_probe(struct platform_device *pdev)
        debounce_cnt = min(pdata->debounce_cnt, KBC_MAX_DEBOUNCE_CNT);
        scan_time_rows = (KBC_ROW_SCAN_TIME + debounce_cnt) * num_rows;
        kbc->repoll_dly = KBC_ROW_SCAN_DLY + scan_time_rows + pdata->repeat_cnt;
-       kbc->repoll_dly = ((kbc->repoll_dly * KBC_CYCLE_USEC) + 999) / 1000;
+       kbc->repoll_dly = DIV_ROUND_UP(kbc->repoll_dly, KBC_CYCLE_MS);
 
        input_dev->name = pdev->name;
        input_dev->id.bustype = BUS_HOST;