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// SPDX-License-Identifier: GPL-2.0-only
/*
* System Specific setup for Traverse Technologies GEOS.
* At the moment this means setup of GPIO control of LEDs.
*
* Copyright (C) 2008 Constantin Baranov <const@mimas.ru>
* Copyright (C) 2011 Ed Wildgoose <kernel@wildgooses.com>
* and Philip Prindeville <philipp@redfish-solutions.com>
*
* TODO: There are large similarities with leds-net5501.c
* by Alessandro Zummo <a.zummo@towertech.it>
* In the future leds-net5501.c should be migrated over to platform
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/string.h>
#include <linux/leds.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/gpio_keys.h>
#include <linux/gpio/machine.h>
#include <linux/dmi.h>
#include <asm/geode.h>
static struct gpio_keys_button geos_gpio_buttons[] = {
{
.code = KEY_RESTART,
.gpio = 3,
.active_low = 1,
.desc = "Reset button",
.type = EV_KEY,
.wakeup = 0,
.debounce_interval = 100,
.can_disable = 0,
}
};
static struct gpio_keys_platform_data geos_buttons_data = {
.buttons = geos_gpio_buttons,
.nbuttons = ARRAY_SIZE(geos_gpio_buttons),
.poll_interval = 20,
};
static struct platform_device geos_buttons_dev = {
.name = "gpio-keys-polled",
.id = 1,
.dev = {
.platform_data = &geos_buttons_data,
}
};
static struct gpio_led geos_leds[] = {
{
.name = "geos:1",
.default_trigger = "default-on",
},
{
.name = "geos:2",
.default_trigger = "default-off",
},
{
.name = "geos:3",
.default_trigger = "default-off",
},
};
static struct gpio_led_platform_data geos_leds_data = {
.num_leds = ARRAY_SIZE(geos_leds),
.leds = geos_leds,
};
static struct gpiod_lookup_table geos_leds_gpio_table = {
.dev_id = "leds-gpio",
.table = {
/* The Geode GPIOs should be on the CS5535 companion chip */
GPIO_LOOKUP_IDX("cs5535-gpio", 6, NULL, 0, GPIO_ACTIVE_LOW),
GPIO_LOOKUP_IDX("cs5535-gpio", 25, NULL, 1, GPIO_ACTIVE_LOW),
GPIO_LOOKUP_IDX("cs5535-gpio", 27, NULL, 2, GPIO_ACTIVE_LOW),
{ }
},
};
static struct platform_device geos_leds_dev = {
.name = "leds-gpio",
.id = -1,
.dev.platform_data = &geos_leds_data,
};
static struct platform_device *geos_devs[] __initdata = {
&geos_buttons_dev,
&geos_leds_dev,
};
static void __init register_geos(void)
{
/* Setup LED control through leds-gpio driver */
gpiod_add_lookup_table(&geos_leds_gpio_table);
platform_add_devices(geos_devs, ARRAY_SIZE(geos_devs));
}
static int __init geos_init(void)
{
const char *vendor, *product;
if (!is_geode())
return 0;
vendor = dmi_get_system_info(DMI_SYS_VENDOR);
if (!vendor || strcmp(vendor, "Traverse Technologies"))
return 0;
product = dmi_get_system_info(DMI_PRODUCT_NAME);
if (!product || strcmp(product, "Geos"))
return 0;
printk(KERN_INFO "%s: system is recognized as \"%s %s\"\n",
KBUILD_MODNAME, vendor, product);
register_geos();
return 0;
}
device_initcall(geos_init);
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