From: Magnus Damm <damm+renesas@xxxxxxxxxxxxx>
This patch is a prototype hack that can be used to test INTC-EX
using the IRQ2 signal on r8a7795 Salvator-X with a loop back
adapter.
The external loop back adapter is connected to EXIO_D and
connects pin 9 (IRQ2/GP2_02) and pin 26 (ExA22/GP2_06).
To test enable CONFIG_GPIO_SYSFS and CONFIG_KEYBOARD_GPIO and
export GP2_06 via /sys/class/gpio/export and then change the
value of the pin and see how interrupt debug messages are
output on the console from the irq-renesas-irqc.c driver.
Not for upstream merge.
Not-Yet-Signed-off-by: Magnus Damm <damm+renesas@xxxxxxxxxxxxx>
---
Written on top of renesas-drivers-2016-02-09-v4.5-rc3 and
[PATCH 00/02] arm64: r8a7795 INTC-EX support using RENESAS_IRQC
[PATCH 01/02] arm64: dts: r8a7795: Add INTC-EX device node
[PATCH 02/02] arm64: renesas: Enable RENESAS_IRQC
[PATCH] pinctrl: sh-pfc: r8a7795: Add support for INTC-EX IRQ pins
[PATCH] clk: shmobile: r8a7795: Add INTC-EX clock
arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts | 31 ++++++++++++++++++++
drivers/irqchip/irq-renesas-irqc.c | 2 -
2 files changed, 32 insertions(+), 1 deletion(-)
--- 0001/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
+++ work/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts 2016-02-16 11:32:50.420513000 +0900
@@ -33,6 +33,8 @@
/dts-v1/;
#include "r8a7795.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
/ {
model = "Renesas Salvator-X board based on r8a7795";
@@ -55,6 +57,30 @@
reg = <0x0 0x48000000 0x0 0x38000000>;
};
+ keyboard {
+ compatible = "gpio-keys";
+
+ pinctrl-0 = <&gpiokey_pins>;
+ pinctrl-names = "default";
+
+ button@1 {
+ linux,code = <KEY_1>;
+ label = "SW21";
+ wakeup-source;
+ debounce-interval = <20>;
+ gpios = <&gpio6 12 GPIO_ACTIVE_LOW>;
+ };
+ button@2 {
+ linux,code = <KEY_2>;
+ label = "SW22";
+ wakeup-source;
+ debounce-interval = <20>;
+ gpios = <&gpio6 13 GPIO_ACTIVE_LOW>;
+ interrupt-parent = <&intc_ex>;
+ interrupts = <2 IRQ_TYPE_LEVEL_LOW>;
+ };
+ };
+
x12_clk: x12_clk {
compatible = "fixed-clock";
#clock-cells = <0>;
@@ -96,6 +122,11 @@
pinctrl-0 = <&scif_clk_pins>;
pinctrl-names = "default";
+ gpiokey_pins: gpiokey1 {
+ renesas,groups = "intc_ex_irq2";
+ renesas,function = "intc_ex";
+ };
+
scif1_pins: scif1 {
renesas,groups = "scif1_data_a", "scif1_ctrl";
renesas,function = "scif1";
--- 0001/drivers/irqchip/irq-renesas-irqc.c
+++ work/drivers/irqchip/irq-renesas-irqc.c 2016-02-16 11:32:13.130513000 +0900
@@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-
+#define DEBUG
#include <linux/clk.h>
#include <linux/init.h>
#include <linux/platform_device.h>
