[PATCH AUTOSEL 5.4 101/134] gpio/mpc8xxx: fix qoriq GPIO reading

Sasha Levin
2019-12-11T16:00:49Z

From: Russell King <rmk+kernel@armlinux.org.uk>

[ Upstream commit 787b64a43f7acacf8099329ea08872e663f1e74f ]

Qoriq requires the IBE register to be set to enable GPIO inputs to be
read. Set it.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/E1iX3HC-00069N-0T@rmk-PC.armlinux.org.uk
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpio/gpio-mpc8xxx.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c
index 16a47de29c94c..b863421ae7309 100644
--- a/drivers/gpio/gpio-mpc8xxx.c
+++ b/drivers/gpio/gpio-mpc8xxx.c
@@ -386,6 +386,9 @@ static int mpc8xxx_probe(struct platform_device *pdev)

gc->to_irq = mpc8xxx_gpio_to_irq;

+ if (of_device_is_compatible(np, "fsl,qoriq-gpio"))
+ gc->write_reg(mpc8xxx_gc->regs + GPIO_IBE, 0xffffffff);
+
ret = gpiochip_add_data(gc, mpc8xxx_gc);
if (ret) {
pr_err("%pOF: GPIO chip registration failed with status %d\n",
--
2.20.1