From: "Li, Ning" <ning...@intel.com>
Signed-off-by: David Cohen <david.a.co...@intel.com>
Signed-off-by: Li, Ning <ning...@intel.com>
---
drivers/gpio/gpio-langwell.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/drivers/gpio/gpio-langwell.c b/drivers/gpio/gpio-langwell.c
index dc534a9..c702d3d 100644
--- a/drivers/gpio/gpio-langwell.c
+++ b/drivers/gpio/gpio-langwell.c
@@ -219,12 +219,30 @@ static int lnw_irq_type(struct irq_data *d, unsigned type)
static void lnw_irq_noop(struct irq_data *d) {}
+static void lnw_irq_shutdown(struct irq_data *d)
+{
+ struct lnw_gpio *lnw = irq_data_get_irq_chip_data(d);
+ u32 gpio = irqd_to_hwirq(d);
+ unsigned long flags;
+ u32 value;
+ void __iomem *grer = gpio_reg(&lnw->chip, gpio, GRER);
+ void __iomem *gfer = gpio_reg(&lnw->chip, gpio, GFER);
+
+ spin_lock_irqsave(&lnw->lock, flags);
+ value = readl(grer) & ~BIT(gpio % 32);
+ writel(value, grer);
+ value = readl(gfer) & ~BIT(gpio % 32);
+ writel(value, gfer);
+ spin_unlock_irqrestore(&lnw->lock, flags);
+};
+
static struct irq_chip lnw_irqchip = {
.name = "LNW-GPIO",
.irq_mask = lnw_irq_noop,
.irq_unmask = lnw_irq_noop,
.irq_set_type = lnw_irq_type,
.irq_ack = lnw_irq_noop,
+ .irq_shutdown = lnw_irq_shutdown,
};
static DEFINE_PCI_DEVICE_TABLE(lnw_gpio_ids) = { /* pin number */
--
1.7.10.4
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