linux-kernel - [PATCH 4.20 52/80] gpio: sprd: Fix the incorrect data register

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Date:   Mon,  4 Feb 2019 11:37:12 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Neo Hou <neo.hou@...soc.com>,
        Baolin Wang <baolin.wang@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: [PATCH 4.20 52/80] gpio: sprd: Fix the incorrect data register

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

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

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

commit 09d158d52d2bceda736797a61b6c13d7fc83707b upstream.

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>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpio/gpio-eic-sprd.c |   13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

--- 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_ch
 
 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)