mirror of
https://github.com/torvalds/linux.git
synced 2024-11-18 18:11:56 +00:00
4e9642528c
Reset GPIO (OMAP_GPIO_152) for QUART in zoom2/zoom3 debug-board is not requested at all. This would lead to problems if this GPIO is wrongly requested. Hence request OMAP GPIO 152 for QUART RESET but do not apply a reset pulse as it would reset QUART and disturb the QUART settings. Signed-off-by: Charulatha V <charu@ti.com> Acked-by: Kevin Hilman <khilman@ti.com> Cc: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
128 lines
3.0 KiB
C
128 lines
3.0 KiB
C
/*
|
|
* Copyright (C) 2009 Texas Instruments Inc.
|
|
* Mikkel Christensen <mlc@ti.com>
|
|
*
|
|
* 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/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/serial_8250.h>
|
|
#include <linux/smsc911x.h>
|
|
#include <linux/interrupt.h>
|
|
|
|
#include <plat/gpmc.h>
|
|
#include <plat/gpmc-smsc911x.h>
|
|
|
|
#include <mach/board-zoom.h>
|
|
|
|
#define ZOOM_SMSC911X_CS 7
|
|
#define ZOOM_SMSC911X_GPIO 158
|
|
#define ZOOM_QUADUART_CS 3
|
|
#define ZOOM_QUADUART_GPIO 102
|
|
#define ZOOM_QUADUART_RST_GPIO 152
|
|
#define QUART_CLK 1843200
|
|
#define DEBUG_BASE 0x08000000
|
|
#define ZOOM_ETHR_START DEBUG_BASE
|
|
|
|
static struct omap_smsc911x_platform_data zoom_smsc911x_cfg = {
|
|
.cs = ZOOM_SMSC911X_CS,
|
|
.gpio_irq = ZOOM_SMSC911X_GPIO,
|
|
.gpio_reset = -EINVAL,
|
|
.flags = SMSC911X_USE_32BIT,
|
|
};
|
|
|
|
static inline void __init zoom_init_smsc911x(void)
|
|
{
|
|
gpmc_smsc911x_init(&zoom_smsc911x_cfg);
|
|
}
|
|
|
|
static struct plat_serial8250_port serial_platform_data[] = {
|
|
{
|
|
.mapbase = ZOOM_UART_BASE,
|
|
.irq = OMAP_GPIO_IRQ(102),
|
|
.flags = UPF_BOOT_AUTOCONF|UPF_IOREMAP|UPF_SHARE_IRQ,
|
|
.irqflags = IRQF_SHARED | IRQF_TRIGGER_RISING,
|
|
.iotype = UPIO_MEM,
|
|
.regshift = 1,
|
|
.uartclk = QUART_CLK,
|
|
}, {
|
|
.flags = 0
|
|
}
|
|
};
|
|
|
|
static struct platform_device zoom_debugboard_serial_device = {
|
|
.name = "serial8250",
|
|
.id = PLAT8250_DEV_PLATFORM,
|
|
.dev = {
|
|
.platform_data = serial_platform_data,
|
|
},
|
|
};
|
|
|
|
static inline void __init zoom_init_quaduart(void)
|
|
{
|
|
int quart_cs;
|
|
unsigned long cs_mem_base;
|
|
int quart_gpio = 0;
|
|
|
|
if (gpio_request_one(ZOOM_QUADUART_RST_GPIO,
|
|
GPIOF_OUT_INIT_LOW,
|
|
"TL16CP754C GPIO") < 0) {
|
|
pr_err("Failed to request GPIO%d for TL16CP754C\n",
|
|
ZOOM_QUADUART_RST_GPIO);
|
|
return;
|
|
}
|
|
|
|
quart_cs = ZOOM_QUADUART_CS;
|
|
|
|
if (gpmc_cs_request(quart_cs, SZ_1M, &cs_mem_base) < 0) {
|
|
printk(KERN_ERR "Failed to request GPMC mem"
|
|
"for Quad UART(TL16CP754C)\n");
|
|
return;
|
|
}
|
|
|
|
quart_gpio = ZOOM_QUADUART_GPIO;
|
|
|
|
if (gpio_request_one(quart_gpio, GPIOF_IN, "TL16CP754C GPIO") < 0)
|
|
printk(KERN_ERR "Failed to request GPIO%d for TL16CP754C\n",
|
|
quart_gpio);
|
|
}
|
|
|
|
static inline int omap_zoom_debugboard_detect(void)
|
|
{
|
|
int debug_board_detect = 0;
|
|
int ret = 1;
|
|
|
|
debug_board_detect = ZOOM_SMSC911X_GPIO;
|
|
|
|
if (gpio_request_one(debug_board_detect, GPIOF_IN,
|
|
"Zoom debug board detect") < 0) {
|
|
printk(KERN_ERR "Failed to request GPIO%d for Zoom debug"
|
|
"board detect\n", debug_board_detect);
|
|
return 0;
|
|
}
|
|
|
|
if (!gpio_get_value(debug_board_detect)) {
|
|
ret = 0;
|
|
}
|
|
gpio_free(debug_board_detect);
|
|
return ret;
|
|
}
|
|
|
|
static struct platform_device *zoom_devices[] __initdata = {
|
|
&zoom_debugboard_serial_device,
|
|
};
|
|
|
|
int __init zoom_debugboard_init(void)
|
|
{
|
|
if (!omap_zoom_debugboard_detect())
|
|
return 0;
|
|
|
|
zoom_init_smsc911x();
|
|
zoom_init_quaduart();
|
|
return platform_add_devices(zoom_devices, ARRAY_SIZE(zoom_devices));
|
|
}
|