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