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125 lines
2.9 KiB
125 lines
2.9 KiB
// 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 <[email protected]> |
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* Copyright (C) 2011 Ed Wildgoose <[email protected]> |
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* and Philip Prindeville <[email protected]> |
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* |
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* TODO: There are large similarities with leds-net5501.c |
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* by Alessandro Zummo <[email protected]> |
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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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