linux/arch/arm/mach-iop32x/em7210.c
Linus Walleij afbf1e156c ARM: iop32x: fix power off handling for the EM7210 board
This board was missed when converting all the others to proper
abstracted GPIO handling. Fix it up the right way by requesting
and driving GPIO line 0 high through gpiolib to power off the
machine.

Cc: Arnaud Patard <arnaud.patard@rtp-net.org>
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
2014-01-31 14:58:53 -08:00

232 lines
4.9 KiB
C

/*
* arch/arm/mach-iop32x/em7210.c
*
* Board support code for the Lanner EM7210 platforms.
*
* Based on arch/arm/mach-iop32x/iq31244.c file.
*
* Copyright (C) 2007 Arnaud Patard <arnaud.patard@rtp-net.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/pm.h>
#include <linux/serial_core.h>
#include <linux/serial_8250.h>
#include <linux/mtd/physmap.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <mach/hardware.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/pci.h>
#include <asm/mach/time.h>
#include <asm/mach-types.h>
#include <mach/time.h>
#include "gpio-iop32x.h"
static void __init em7210_timer_init(void)
{
/* http://www.kwaak.net/fotos/fotos-nas/slide_24.html */
/* 33.333 MHz crystal. */
iop_init_time(200000000);
}
/*
* EM7210 RTC
*/
static struct i2c_board_info __initdata em7210_i2c_devices[] = {
{
I2C_BOARD_INFO("rs5c372a", 0x32),
},
};
/*
* EM7210 I/O
*/
static struct map_desc em7210_io_desc[] __initdata = {
{ /* on-board devices */
.virtual = IQ31244_UART,
.pfn = __phys_to_pfn(IQ31244_UART),
.length = 0x00100000,
.type = MT_DEVICE,
},
};
void __init em7210_map_io(void)
{
iop3xx_map_io();
iotable_init(em7210_io_desc, ARRAY_SIZE(em7210_io_desc));
}
/*
* EM7210 PCI
*/
#define INTA IRQ_IOP32X_XINT0
#define INTB IRQ_IOP32X_XINT1
#define INTC IRQ_IOP32X_XINT2
#define INTD IRQ_IOP32X_XINT3
static int __init
em7210_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
static int pci_irq_table[][4] = {
/*
* PCI IDSEL/INTPIN->INTLINE
* A B C D
*/
{INTB, INTB, INTB, INTB}, /* console / uart */
{INTA, INTA, INTA, INTA}, /* 1st 82541 */
{INTD, INTD, INTD, INTD}, /* 2nd 82541 */
{INTC, INTC, INTC, INTC}, /* GD31244 */
{INTD, INTA, INTA, INTA}, /* mini-PCI */
{INTD, INTC, INTA, INTA}, /* NEC USB */
};
if (pin < 1 || pin > 4)
return -1;
return pci_irq_table[slot % 6][pin - 1];
}
static struct hw_pci em7210_pci __initdata = {
.nr_controllers = 1,
.ops = &iop3xx_ops,
.setup = iop3xx_pci_setup,
.preinit = iop3xx_pci_preinit,
.map_irq = em7210_pci_map_irq,
};
static int __init em7210_pci_init(void)
{
if (machine_is_em7210())
pci_common_init(&em7210_pci);
return 0;
}
subsys_initcall(em7210_pci_init);
/*
* EM7210 Flash
*/
static struct physmap_flash_data em7210_flash_data = {
.width = 2,
};
static struct resource em7210_flash_resource = {
.start = 0xf0000000,
.end = 0xf1ffffff,
.flags = IORESOURCE_MEM,
};
static struct platform_device em7210_flash_device = {
.name = "physmap-flash",
.id = 0,
.dev = {
.platform_data = &em7210_flash_data,
},
.num_resources = 1,
.resource = &em7210_flash_resource,
};
/*
* EM7210 UART
* The physical address of the serial port is 0xfe800000,
* so it can be used for physical and virtual address.
*/
static struct plat_serial8250_port em7210_serial_port[] = {
{
.mapbase = IQ31244_UART,
.membase = (char *)IQ31244_UART,
.irq = IRQ_IOP32X_XINT1,
.flags = UPF_SKIP_TEST,
.iotype = UPIO_MEM,
.regshift = 0,
.uartclk = 1843200,
},
{ },
};
static struct resource em7210_uart_resource = {
.start = IQ31244_UART,
.end = IQ31244_UART + 7,
.flags = IORESOURCE_MEM,
};
static struct platform_device em7210_serial_device = {
.name = "serial8250",
.id = PLAT8250_DEV_PLATFORM,
.dev = {
.platform_data = em7210_serial_port,
},
.num_resources = 1,
.resource = &em7210_uart_resource,
};
#define EM7210_HARDWARE_POWER 0
void em7210_power_off(void)
{
int ret;
ret = gpio_direction_output(EM7210_HARDWARE_POWER, 1);
if (ret)
pr_crit("could not drive power off GPIO high\n");
}
static int __init em7210_request_gpios(void)
{
int ret;
if (!machine_is_em7210())
return 0;
ret = gpio_request(EM7210_HARDWARE_POWER, "power");
if (ret) {
pr_err("could not request power off GPIO\n");
return 0;
}
pm_power_off = em7210_power_off;
return 0;
}
device_initcall(em7210_request_gpios);
static void __init em7210_init_machine(void)
{
register_iop32x_gpio();
platform_device_register(&em7210_serial_device);
platform_device_register(&iop3xx_i2c0_device);
platform_device_register(&iop3xx_i2c1_device);
platform_device_register(&em7210_flash_device);
platform_device_register(&iop3xx_dma_0_channel);
platform_device_register(&iop3xx_dma_1_channel);
i2c_register_board_info(0, em7210_i2c_devices,
ARRAY_SIZE(em7210_i2c_devices));
}
MACHINE_START(EM7210, "Lanner EM7210")
.atag_offset = 0x100,
.map_io = em7210_map_io,
.init_irq = iop32x_init_irq,
.init_time = em7210_timer_init,
.init_machine = em7210_init_machine,
.restart = iop3xx_restart,
MACHINE_END