This serves as an illustration of how to use the gpio-keys
in boardfiles with just a machine GPIO descriptor table.
It is a hack for the joystick connector on the entirely
boardfile-based SIM.ONE. It will probably not be applied.
Cc: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Cc: Andy Shevchenko <andy@xxxxxxxxxxxxx>
Cc: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Cc: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
arch/arm/mach-ep93xx/simone.c | 50 +++++++++++++++++++++++++++++++++++
1 file changed, 50 insertions(+)
diff --git a/arch/arm/mach-ep93xx/simone.c b/arch/arm/mach-ep93xx/simone.c
index 41aa57581356..a3c3020da850 100644
--- a/arch/arm/mach-ep93xx/simone.c
+++ b/arch/arm/mach-ep93xx/simone.c
@@ -24,7 +24,10 @@
#include <linux/spi/mmc_spi.h>
#include <linux/platform_data/video-ep93xx.h>
#include <linux/platform_data/spi-ep93xx.h>
+#include <linux/gpio/machine.h>
#include <linux/gpio.h>
+#include <linux/input.h>
+#include <linux/gpio_keys.h>
#include <mach/hardware.h>
#include <mach/gpio-ep93xx.h>
@@ -34,6 +37,51 @@
#include "soc.h"
+static struct gpio_keys_button simone_buttons[] = {
+ {
+ .code = KEY_ENTER,
+ .type = EV_KEY,
+ .active_low = 1,
+ .desc = "enter",
+ },
+ {
+ .code = KEY_UP,
+ .type = EV_KEY,
+ .active_low = 1,
+ .desc = "up",
+ },
+ {
+ .code = KEY_LEFT,
+ .type = EV_KEY,
+ .active_low = 1,
+ .desc = "left",
+ },
+};
+
+static struct gpio_keys_platform_data simone_keys_pdata = {
+ .buttons = simone_buttons,
+ .nbuttons = ARRAY_SIZE(simone_buttons),
+ .rep = 0,
+};
+
+static struct gpiod_lookup_table simone_keys_gpiod_table = {
+ .dev_id = "gpio-keys",
+ .table = {
+ /* Use local offsets on gpiochip/port "B" */
+ GPIO_LOOKUP_IDX("B", 0, "gpios", 0, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("B", 1, "gpios", 1, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("B", 2, "gpios", 2, GPIO_ACTIVE_LOW),
+ },
+};
+
+static struct platform_device simone_keys_device = {
+ .name = "gpio-keys",
+ .id = -1,
+ .dev = {
+ .platform_data = &simone_keys_pdata,
+ },
+};
+
static struct ep93xx_eth_data __initdata simone_eth_data = {
.phy_id = 1,
};
@@ -107,6 +155,8 @@ static void __init simone_init_machine(void)
ARRAY_SIZE(simone_i2c_board_info));
ep93xx_register_spi(&simone_spi_info, simone_spi_devices,
ARRAY_SIZE(simone_spi_devices));
+ gpiod_add_lookup_table(&simone_keys_gpiod_table);
+ platform_device_register(&simone_keys_device);
simone_register_audio();
}
--
2.17.1
