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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>
This commit is contained in:
Rakesh Iyer 2011-07-30 12:01:48 -07:00 committed by Dmitry Torokhov
parent 2501ec9766
commit 3f27757a11
1 changed files with 3 additions and 2 deletions
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5
drivers/input/keyboard/tegra-kbc.c
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@ -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;