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Commit 3f27757a authored by Rakesh Iyer's avatar Rakesh Iyer Committed by Dmitry Torokhov
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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: default avatarRakesh Iyer <riyer@nvidia.com>
Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
parent 2501ec97

drivers/input/keyboard/tegra-kbc.c

+3 −2
Original line number Diff line number Diff line
@@ -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;