forked from mirrors/linux
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>
127 lines
3 KiB
C
127 lines
3 KiB
C
/*
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* Copyright (C) 2009 Texas Instruments Inc.
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* Mikkel Christensen <mlc@ti.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 version 2 as
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* published by the Free Software Foundation.
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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/gpio.h>
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#include <linux/serial_8250.h>
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#include <linux/smsc911x.h>
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#include <linux/interrupt.h>
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#include <plat/gpmc.h>
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#include <plat/gpmc-smsc911x.h>
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#include <mach/board-zoom.h>
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#define ZOOM_SMSC911X_CS 7
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#define ZOOM_SMSC911X_GPIO 158
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#define ZOOM_QUADUART_CS 3
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#define ZOOM_QUADUART_GPIO 102
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#define ZOOM_QUADUART_RST_GPIO 152
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#define QUART_CLK 1843200
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#define DEBUG_BASE 0x08000000
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#define ZOOM_ETHR_START DEBUG_BASE
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static struct omap_smsc911x_platform_data zoom_smsc911x_cfg = {
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.cs = ZOOM_SMSC911X_CS,
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.gpio_irq = ZOOM_SMSC911X_GPIO,
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.gpio_reset = -EINVAL,
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.flags = SMSC911X_USE_32BIT,
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};
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static inline void __init zoom_init_smsc911x(void)
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{
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gpmc_smsc911x_init(&zoom_smsc911x_cfg);
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}
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static struct plat_serial8250_port serial_platform_data[] = {
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{
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.mapbase = ZOOM_UART_BASE,
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.irq = OMAP_GPIO_IRQ(102),
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.flags = UPF_BOOT_AUTOCONF|UPF_IOREMAP|UPF_SHARE_IRQ,
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.irqflags = IRQF_SHARED | IRQF_TRIGGER_RISING,
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.iotype = UPIO_MEM,
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.regshift = 1,
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.uartclk = QUART_CLK,
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}, {
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.flags = 0
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}
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};
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static struct platform_device zoom_debugboard_serial_device = {
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.name = "serial8250",
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.id = PLAT8250_DEV_PLATFORM,
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.dev = {
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.platform_data = serial_platform_data,
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},
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};
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static inline void __init zoom_init_quaduart(void)
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{
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int quart_cs;
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unsigned long cs_mem_base;
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int quart_gpio = 0;
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if (gpio_request_one(ZOOM_QUADUART_RST_GPIO,
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GPIOF_OUT_INIT_LOW,
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"TL16CP754C GPIO") < 0) {
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pr_err("Failed to request GPIO%d for TL16CP754C\n",
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ZOOM_QUADUART_RST_GPIO);
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return;
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}
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quart_cs = ZOOM_QUADUART_CS;
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if (gpmc_cs_request(quart_cs, SZ_1M, &cs_mem_base) < 0) {
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printk(KERN_ERR "Failed to request GPMC mem"
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"for Quad UART(TL16CP754C)\n");
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return;
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}
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quart_gpio = ZOOM_QUADUART_GPIO;
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if (gpio_request_one(quart_gpio, GPIOF_IN, "TL16CP754C GPIO") < 0)
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printk(KERN_ERR "Failed to request GPIO%d for TL16CP754C\n",
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quart_gpio);
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}
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static inline int omap_zoom_debugboard_detect(void)
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{
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int debug_board_detect = 0;
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int ret = 1;
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debug_board_detect = ZOOM_SMSC911X_GPIO;
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if (gpio_request_one(debug_board_detect, GPIOF_IN,
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"Zoom debug board detect") < 0) {
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printk(KERN_ERR "Failed to request GPIO%d for Zoom debug"
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"board detect\n", debug_board_detect);
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return 0;
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}
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if (!gpio_get_value(debug_board_detect)) {
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ret = 0;
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}
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gpio_free(debug_board_detect);
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return ret;
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}
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static struct platform_device *zoom_devices[] __initdata = {
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&zoom_debugboard_serial_device,
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};
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int __init zoom_debugboard_init(void)
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{
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if (!omap_zoom_debugboard_detect())
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return 0;
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zoom_init_smsc911x();
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zoom_init_quaduart();
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return platform_add_devices(zoom_devices, ARRAY_SIZE(zoom_devices));
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}
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