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https://github.com/edk2-porting/linux-next.git
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21f47fbc5b
This adds support for the family of Systems-on-Chip produced initially by VIA and now its subsidiary WonderMedia that have recently become widespread in lower-end Chinese ARM-based tablets and netbooks. Support is included for both VT8500 and WM8505, selectable by a configuration switch at kernel build time. Included are basic machine initialization files, register and interrupt definitions, support for the on-chip interrupt controller, high-precision OS timer, GPIO lines, necessary macros for early debug, pulse-width-modulated outputs control, as well as platform device configurations for the specific drivers implemented elsewhere. Signed-off-by: Alexey Charkov <alchark@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
/*
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* arch/arm/mach-vt8500/wm8505_7in.c
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*
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* Copyright (C) 2010 Alexey Charkov <alchark@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/io.h>
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#include <linux/pm.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include "devices.h"
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static void __iomem *pmc_hiber;
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static struct platform_device *devices[] __initdata = {
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&vt8500_device_uart0,
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&vt8500_device_ehci,
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&vt8500_device_wm8505_fb,
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&vt8500_device_ge_rops,
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&vt8500_device_pwm,
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&vt8500_device_pwmbl,
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&vt8500_device_rtc,
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};
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static void vt8500_power_off(void)
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{
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local_irq_disable();
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writew(5, pmc_hiber);
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asm("mcr%? p15, 0, %0, c7, c0, 4" : : "r" (0));
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}
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void __init wm8505_7in_init(void)
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{
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#ifdef CONFIG_FB_WM8505
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void __iomem *gpio_mux_reg = ioremap(wmt_gpio_base + 0x200, 4);
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if (gpio_mux_reg) {
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writel(readl(gpio_mux_reg) | 0x80000000, gpio_mux_reg);
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iounmap(gpio_mux_reg);
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} else {
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printk(KERN_ERR "Could not remap the GPIO mux register, display may not work properly!\n");
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}
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#endif
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pmc_hiber = ioremap(wmt_pmc_base + 0x12, 2);
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if (pmc_hiber)
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pm_power_off = &vt8500_power_off;
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else
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printk(KERN_ERR "PMC Hibernation register could not be remapped, not enabling power off!\n");
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wm8505_set_resources();
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platform_add_devices(devices, ARRAY_SIZE(devices));
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vt8500_gpio_init();
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}
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MACHINE_START(WM8505_7IN_NETBOOK, "WM8505 7-inch generic netbook")
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.boot_params = 0x00000100,
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.reserve = wm8505_reserve_mem,
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.map_io = wm8505_map_io,
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.init_irq = wm8505_init_irq,
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.timer = &vt8500_timer,
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.init_machine = wm8505_7in_init,
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MACHINE_END
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