lkml.org 
[lkml]   [2018]   [Mar]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH AUTOSEL for 4.9 104/190] gpio: gpio-wcove: fix GPIO IRQ status mask
Date
From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>

[ Upstream commit 881ebd229f4a5ea88f269c1225245e50db9ba303 ]

According to Whiskey Cove PMIC spec, bit 7 of GPIOIRQ0_REG belongs to
battery IO. So we should skip this bit when checking for GPIO IRQ pending
status. Otherwise, wcove_gpio_irq_handler() might go into the infinite
loop until IRQ "pending" status becomes 0. This patch fixes this issue.

Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
drivers/gpio/gpio-wcove.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-wcove.c b/drivers/gpio/gpio-wcove.c
index 1012c86925ad..5ef4980f3f14 100644
--- a/drivers/gpio/gpio-wcove.c
+++ b/drivers/gpio/gpio-wcove.c
@@ -51,6 +51,8 @@
#define GROUP1_NR_IRQS 6
#define IRQ_MASK_BASE 0x4e19
#define IRQ_STATUS_BASE 0x4e0b
+#define GPIO_IRQ0_MASK GENMASK(6, 0)
+#define GPIO_IRQ1_MASK GENMASK(5, 0)
#define UPDATE_IRQ_TYPE BIT(0)
#define UPDATE_IRQ_MASK BIT(1)

@@ -310,7 +312,7 @@ static irqreturn_t wcove_gpio_irq_handler(int irq, void *data)
return IRQ_NONE;
}

- pending = p[0] | (p[1] << 8);
+ pending = (p[0] & GPIO_IRQ0_MASK) | ((p[1] & GPIO_IRQ1_MASK) << 7);
if (!pending)
return IRQ_NONE;

@@ -334,7 +336,7 @@ static irqreturn_t wcove_gpio_irq_handler(int irq, void *data)
break;
}

- pending = p[0] | (p[1] << 8);
+ pending = (p[0] & GPIO_IRQ0_MASK) | ((p[1] & GPIO_IRQ1_MASK) << 7);
}

return IRQ_HANDLED;
--
2.14.1
\
 
 \ /
  Last update: 2018-03-08 07:08    [W:0.650 / U:6.124 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site