298c9babad
Convert GPIO-connected buttons and LEDs in Geode boards to software nodes/properties, so that support for platform data can be removed from gpio-keys driver (which will rely purely on generic device properties for configuration). To avoid repeating the same data structures over and over and over factor them out into a new geode-common.c file. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Borislav Petkov (AMD) <bp@alien8.de> Link: https://lore.kernel.org/r/ZsV6MNS_tUPPSffJ@google.com Signed-off-by: Hans de Goede <hdegoede@redhat.com>
98 lines
2.1 KiB
C
98 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* System Specific setup for Soekris net5501
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* At the moment this means setup of GPIO control of LEDs and buttons
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* on net5501 boards.
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*
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* Copyright (C) 2008-2009 Tower Technologies
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* Written by Alessandro Zummo <a.zummo@towertech.it>
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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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#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/input.h>
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#include <linux/gpio/machine.h>
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#include <linux/gpio/property.h>
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#include <asm/geode.h>
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#include "geode-common.h"
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#define BIOS_REGION_BASE 0xffff0000
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#define BIOS_REGION_SIZE 0x00010000
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static const struct geode_led net5501_leds[] __initconst = {
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{ 6, true },
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};
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static void __init register_net5501(void)
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{
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geode_create_restart_key(24);
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geode_create_leds("net5501", net5501_leds, ARRAY_SIZE(net5501_leds));
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}
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struct net5501_board {
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u16 offset;
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u16 len;
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char *sig;
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};
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static struct net5501_board __initdata boards[] = {
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{ 0xb7b, 7, "net5501" }, /* net5501 v1.33/1.33c */
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{ 0xb1f, 7, "net5501" }, /* net5501 v1.32i */
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};
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static bool __init net5501_present(void)
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{
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int i;
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unsigned char *rombase, *bios;
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bool found = false;
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rombase = ioremap(BIOS_REGION_BASE, BIOS_REGION_SIZE - 1);
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if (!rombase) {
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printk(KERN_ERR "%s: failed to get rombase\n", KBUILD_MODNAME);
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return found;
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}
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bios = rombase + 0x20; /* null terminated */
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if (memcmp(bios, "comBIOS", 7))
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goto unmap;
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for (i = 0; i < ARRAY_SIZE(boards); i++) {
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unsigned char *model = rombase + boards[i].offset;
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if (!memcmp(model, boards[i].sig, boards[i].len)) {
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printk(KERN_INFO "%s: system is recognized as \"%s\"\n",
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KBUILD_MODNAME, model);
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found = true;
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break;
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}
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}
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unmap:
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iounmap(rombase);
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return found;
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}
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static int __init net5501_init(void)
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{
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if (!is_geode())
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return 0;
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if (!net5501_present())
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return 0;
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register_net5501();
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return 0;
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}
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device_initcall(net5501_init);
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