linux-kernel - [PATCH 4.5 072/200] pinctrl: mediatek: correct debounce time unit in mtk_gpio_set

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Date:	Mon,  2 May 2016 17:11:11 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Yingjoe Chen <yingjoe.chen@...iatek.com>,
	Daniel Kurtz <djkurtz@...omium.org>,
	Hongzhou Yang <hongzhou.yang@...iatek.com>,
	Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH 4.5 072/200] pinctrl: mediatek: correct debounce time unit in mtk_gpio_set_debounce

4.5-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Yingjoe Chen <yingjoe.chen@...iatek.com>

commit 5fedbb923936174ab4d1d5cc92bca1cf6b2e0ca2 upstream.

The debounce time unit for gpio_chip.set_debounce is us but
mtk_gpio_set_debounce regard it as ms.
Fix this by correct debounce time array dbnc_arr so it can find correct
debounce setting. Debounce time for first debounce setting is 500us,
correct this as well.

While I'm at it, also change the debounce time array name to
"debounce_time" for readability.

Signed-off-by: Yingjoe Chen <yingjoe.chen@...iatek.com>
Reviewed-by: Daniel Kurtz <djkurtz@...omium.org>
Acked-by: Hongzhou Yang <hongzhou.yang@...iatek.com>
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/pinctrl/mediatek/pinctrl-mtk-common.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
@@ -949,7 +949,8 @@ static int mtk_gpio_set_debounce(struct
 	struct mtk_pinctrl *pctl = dev_get_drvdata(chip->parent);
 	int eint_num, virq, eint_offset;
 	unsigned int set_offset, bit, clr_bit, clr_offset, rst, i, unmask, dbnc;
-	static const unsigned int dbnc_arr[] = {0 , 1, 16, 32, 64, 128, 256};
+	static const unsigned int debounce_time[] = {500, 1000, 16000, 32000, 64000,
+						128000, 256000};
 	const struct mtk_desc_pin *pin;
 	struct irq_data *d;
 
@@ -967,9 +968,9 @@ static int mtk_gpio_set_debounce(struct
 	if (!mtk_eint_can_en_debounce(pctl, eint_num))
 		return -ENOSYS;
 
-	dbnc = ARRAY_SIZE(dbnc_arr);
-	for (i = 0; i < ARRAY_SIZE(dbnc_arr); i++) {
-		if (debounce <= dbnc_arr[i]) {
+	dbnc = ARRAY_SIZE(debounce_time);
+	for (i = 0; i < ARRAY_SIZE(debounce_time); i++) {
+		if (debounce <= debounce_time[i]) {
 			dbnc = i;
 			break;
 		}