ARM: shmobile: irqpin: add a DT property to enable masking on parent

To disable spurious interrupts, that get triggered on certain hardware, the
irqpin driver masks them on the parent interrupt controller. To specify
such broken devices a .control_parent parameter can be provided in the
platform data. In the DT case we need a property, to do the same.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --git a/Documentation/devicetree/bindings/interrupt-controller/renesas,intc-irqpin.txt b/Documentation/devicetree/bindings/interrupt-controller/renesas,intc-irqpin.txt
index 66fcaf5b09ff3186a9d14c25829f2451a8175d9e..1f8b0c507c26cb4c0a7f3341aa1000a7df3c4dea 100644 (file)
--- a/Documentation/devicetree/bindings/interrupt-controller/renesas,intc-irqpin.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/renesas,intc-irqpin.txt
@@ -12,3 +12,5 @@ Optional properties:
   properties
 - sense-bitfield-width: width of a single sense bitfield in the SENSE register,
   if different from the default 4 bits
+- control-parent: disable and enable interrupts on the parent interrupt
+  controller, needed for some broken implementations

diff --git a/drivers/irqchip/irq-renesas-intc-irqpin.c b/drivers/irqchip/irq-renesas-intc-irqpin.c
index 4aca1b2bcc489dcf16d40dbc346649d1d89e42ad..82cec63a90112e184c96a2e21e612df977adf7b7 100644 (file)
--- a/drivers/irqchip/irq-renesas-intc-irqpin.c
+++ b/drivers/irqchip/irq-renesas-intc-irqpin.c
@@ -348,11 +348,14 @@ static int intc_irqpin_probe(struct platform_device *pdev)
        }
 
        /* deal with driver instance configuration */
-       if (pdata)
+       if (pdata) {
                memcpy(&p->config, pdata, sizeof(*pdata));
-       else
+       } else {
                of_property_read_u32(pdev->dev.of_node, "sense-bitfield-width",
                                     &p->config.sense_bitfield_width);
+               p->config.control_parent = of_property_read_bool(pdev->dev.of_node,
+                                                                "control-parent");
+       }
        if (!p->config.sense_bitfield_width)
                p->config.sense_bitfield_width = 4; /* default to 4 bits */