linux-kernel - [PATCH v2 1/2] gpio: sprd: Fix the incorrect data register

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Message-Id: <24594f8799f6aabdeaad3935fe36d832fb465148.1547615070.git.baolin.wang@linaro.org>
Date:   Wed, 16 Jan 2019 13:06:13 +0800
From:   Baolin Wang <baolin.wang@...aro.org>
To:     linus.walleij@...aro.org, bgolaszewski@...libre.com
Cc:     orsonzhai@...il.com, zhang.lyra@...il.com, baolin.wang@...aro.org,
        neo.hou@...soc.com, broonie@...nel.org, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/2] gpio: sprd: Fix the incorrect data register

From: Neo Hou <neo.hou@...soc.com>

Since differnt type EICs have its own data register to read, thus fix the
incorrect data register.

Fixes: 25518e024e3a ("gpio: Add Spreadtrum EIC driver support")
Cc: <stable@...r.kernel.org>
Signed-off-by: Neo Hou <neo.hou@...soc.com>
Signed-off-by: Baolin Wang <baolin.wang@...aro.org>
---
Changes from v1:
 - Add fix tag and CC stable.
---
 drivers/gpio/gpio-eic-sprd.c |   13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-eic-sprd.c b/drivers/gpio/gpio-eic-sprd.c
index e0d6a0a..257df59 100644
--- a/drivers/gpio/gpio-eic-sprd.c
+++ b/drivers/gpio/gpio-eic-sprd.c
@@ -180,7 +180,18 @@ static void sprd_eic_free(struct gpio_chip *chip, unsigned int offset)
 
 static int sprd_eic_get(struct gpio_chip *chip, unsigned int offset)
 {
-	return sprd_eic_read(chip, offset, SPRD_EIC_DBNC_DATA);
+	struct sprd_eic *sprd_eic = gpiochip_get_data(chip);
+
+	switch (sprd_eic->type) {
+	case SPRD_EIC_DEBOUNCE:
+		return sprd_eic_read(chip, offset, SPRD_EIC_DBNC_DATA);
+	case SPRD_EIC_ASYNC:
+		return sprd_eic_read(chip, offset, SPRD_EIC_ASYNC_DATA);
+	case SPRD_EIC_SYNC:
+		return sprd_eic_read(chip, offset, SPRD_EIC_SYNC_DATA);
+	default:
+		return -ENOTSUPP;
+	}
 }
 
 static int sprd_eic_direction_input(struct gpio_chip *chip, unsigned int offset)
-- 
1.7.9.5