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brcm63xx: implement gpio_to_irq for bcm63xx-gpio 

Add support for mapping some GPIO lines to IRQs. GPIO to IRQ mappings
were found out through experimentation, helped by having the GPIO as
output still toggling the IRQ input.

Based-on: http://patchwork.ozlabs.org/patch/660534/
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
owl
Jonas Gorski 2016-12-18 13:54:17 +01:00
parent 94bbd1f057
commit dd7079e79a
8 changed files with 53 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
target/linux/brcm63xx/dts/bcm6318.dtsi
View File

@ -65,6 +65,10 @@
#gpio-cells = <2>;
ngpios = <18>;
interrupt-parent = <&ext_intc>;
interrupts = <0 0>, <1 0>;
interrupt-names = "gpio1", "gpio2";
};
gpio0: gpio-controller@10000084 {

4
target/linux/brcm63xx/dts/bcm63268.dtsi
View File

@ -72,6 +72,10 @@
#gpio-cells = <2>;
ngpios = <20>;
interrupt-parent = <&periph_intc>;
interrupts = <0 0>, <1 0>, <2 0>, <3 0>;
interrupt-names = "gpio0", "gpio1", "gpio2", "gpio3";
};
gpio0: gpio-controller@100000c4 {

5
target/linux/brcm63xx/dts/bcm6328.dtsi
View File

@ -62,6 +62,11 @@
gpio-controller;
#gpio-cells = <2>;
interrupt-parent = <&ext_intc>;
interrupts = <3 0>, <2 0>, <0 0>, <1 0>;
interrupt-names = "gpio12", "gpio15",
"gpio23", "gpio24";
};
};
};

4
target/linux/brcm63xx/dts/bcm6348.dtsi
View File

@ -78,6 +78,10 @@
#gpio-cells = <2>;
ngpios = <5>;
interrupt-parent = <&ext_intc>;
interrupts = <0 0>, <1 0>, <2 0>, <3 0>;
interrupt-names = "gpio0", "gpio1", "gpio2", "gpio3";
};
gpio0: gpio-controller@fffe0404 {

9
target/linux/brcm63xx/dts/bcm6358.dtsi
View File

@ -94,6 +94,15 @@
#gpio-cells = <2>;
ngpios = <8>;
interrupts-extended = <&ext_intc1 0 0>,
<&ext_intc1 1 0>,
<&ext_intc0 0 0>,
<&ext_intc0 1 0>,
<&ext_intc0 2 0>,
<&ext_intc0 3 0>;
interrupt-names = "gpio0", "gpio1", "gpio2", "gpio3",
"gpio4", "gpio5";
};
gpio0: gpio-controller@fffe0084 {

5
target/linux/brcm63xx/dts/bcm6362.dtsi
View File

@ -80,6 +80,11 @@
gpio-controller;
#gpio-cells = <2>;
interrupt-parent = <&ext_intc>;
interrupts = <0 0>, <1 0>, <2 0>, <3 0>;
interrupt-names = "gpio24", "gpio25",
"gpio26", "gpio27";
};
};
};

9
target/linux/brcm63xx/dts/bcm6368.dtsi
View File

@ -84,6 +84,15 @@
#gpio-cells = <2>;
ngpios = <6>;
interrupts-extended = <&ext_intc1 0 0>,
<&ext_intc1 1 0>,
<&ext_intc0 0 0>,
<&ext_intc0 1 0>,
<&ext_intc0 2 0>,
<&ext_intc0 3 0>;
interrupt-names = "gpio0", "gpio1", "gpio2", "gpio3",
"gpio4", "gpio5";
};
gpio0: gpio-controller@10000084 {

14
target/linux/brcm63xx/patches-4.4/374-gpio-add-a-simple-GPIO-driver-for-bcm63xx.patch
View File

@ -40,7 +40,7 @@ Signed-off-by: Jonas Gorski <jogo@openwrt.org>
obj-$(CONFIG_GPIO_CLPS711X) += gpio-clps711x.o
--- /dev/null
+++ b/drivers/gpio/gpio-bcm63xx.c
@@ -0,0 +1,122 @@
@@ -0,0 +1,134 @@
+/*
+ * Driver for BCM63XX memory-mapped GPIO controllers, based on
+ * Generic driver for memory-mapped GPIO controllers.
@ -73,8 +73,17 @@ Signed-off-by: Jonas Gorski <jogo@openwrt.org>
+#include <linux/mod_devicetable.h>
+#include <linux/basic_mmio_gpio.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_gpio.h>
+
+static int bcm63xx_gpio_to_irq(struct gpio_chip *chip, unsigned gpio)
+{
+ char irq_name[7]; /* "gpioXX" */
+
+ sprintf(irq_name, "gpio%d", gpio);
+ return of_irq_get_byname(chip->of_node, irq_name);
+}
+
+static int bcm63xx_gpio_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
@ -126,6 +135,9 @@ Signed-off-by: Jonas Gorski <jogo@openwrt.org>
+ if (!of_property_read_u32(dev->of_node, "ngpios", &ngpios))
+ bgc->gc.ngpio = ngpios;
+
+ if (of_get_property(dev->of_node, "interrupt-names", NULL))
+ bgc->gc.to_irq = bcm63xx_gpio_to_irq;
+
+ } else if (pdata) {
+ bgc->gc.base = pdata->base;
+ if (pdata->ngpio > 0)