130 lines
2.9 KiB
C
130 lines
2.9 KiB
C
/*
|
|
* Copyright (C) 2010 DENX Software Engineering
|
|
*
|
|
* Anatolij Gustschin, <agust@denx.de>
|
|
*
|
|
* PDM360NG board setup
|
|
*
|
|
* This is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/io.h>
|
|
#include <linux/of_platform.h>
|
|
|
|
#include <asm/machdep.h>
|
|
#include <asm/ipic.h>
|
|
|
|
#include "mpc512x.h"
|
|
|
|
#if defined(CONFIG_TOUCHSCREEN_ADS7846) || \
|
|
defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)
|
|
#include <linux/interrupt.h>
|
|
#include <linux/spi/ads7846.h>
|
|
#include <linux/spi/spi.h>
|
|
#include <linux/notifier.h>
|
|
|
|
static void *pdm360ng_gpio_base;
|
|
|
|
static int pdm360ng_get_pendown_state(void)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = in_be32(pdm360ng_gpio_base + 0xc);
|
|
if (reg & 0x40)
|
|
setbits32(pdm360ng_gpio_base + 0xc, 0x40);
|
|
|
|
reg = in_be32(pdm360ng_gpio_base + 0x8);
|
|
|
|
/* return 1 if pen is down */
|
|
return (reg & 0x40) == 0;
|
|
}
|
|
|
|
static struct ads7846_platform_data pdm360ng_ads7846_pdata = {
|
|
.model = 7845,
|
|
.get_pendown_state = pdm360ng_get_pendown_state,
|
|
.irq_flags = IRQF_TRIGGER_LOW,
|
|
};
|
|
|
|
static int __init pdm360ng_penirq_init(void)
|
|
{
|
|
struct device_node *np;
|
|
|
|
np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-gpio");
|
|
if (!np) {
|
|
pr_err("%s: Can't find 'mpc5121-gpio' node\n", __func__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
pdm360ng_gpio_base = of_iomap(np, 0);
|
|
of_node_put(np);
|
|
if (!pdm360ng_gpio_base) {
|
|
pr_err("%s: Can't map gpio regs.\n", __func__);
|
|
return -ENODEV;
|
|
}
|
|
out_be32(pdm360ng_gpio_base + 0xc, 0xffffffff);
|
|
setbits32(pdm360ng_gpio_base + 0x18, 0x2000);
|
|
setbits32(pdm360ng_gpio_base + 0x10, 0x40);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pdm360ng_touchscreen_notifier_call(struct notifier_block *nb,
|
|
unsigned long event, void *__dev)
|
|
{
|
|
struct device *dev = __dev;
|
|
|
|
if ((event == BUS_NOTIFY_ADD_DEVICE) &&
|
|
of_device_is_compatible(dev->of_node, "ti,ads7846")) {
|
|
dev->platform_data = &pdm360ng_ads7846_pdata;
|
|
return NOTIFY_OK;
|
|
}
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static struct notifier_block pdm360ng_touchscreen_nb = {
|
|
.notifier_call = pdm360ng_touchscreen_notifier_call,
|
|
};
|
|
|
|
static void __init pdm360ng_touchscreen_init(void)
|
|
{
|
|
if (pdm360ng_penirq_init())
|
|
return;
|
|
|
|
bus_register_notifier(&spi_bus_type, &pdm360ng_touchscreen_nb);
|
|
}
|
|
#else
|
|
static inline void __init pdm360ng_touchscreen_init(void)
|
|
{
|
|
}
|
|
#endif /* CONFIG_TOUCHSCREEN_ADS7846 */
|
|
|
|
void __init pdm360ng_init(void)
|
|
{
|
|
mpc512x_init();
|
|
pdm360ng_touchscreen_init();
|
|
}
|
|
|
|
static int __init pdm360ng_probe(void)
|
|
{
|
|
unsigned long root = of_get_flat_dt_root();
|
|
|
|
return of_flat_dt_is_compatible(root, "ifm,pdm360ng");
|
|
}
|
|
|
|
define_machine(pdm360ng) {
|
|
.name = "PDM360NG",
|
|
.probe = pdm360ng_probe,
|
|
.setup_arch = mpc512x_setup_diu,
|
|
.init = pdm360ng_init,
|
|
.init_early = mpc512x_init_diu,
|
|
.init_IRQ = mpc512x_init_IRQ,
|
|
.get_irq = ipic_get_irq,
|
|
.calibrate_decr = generic_calibrate_decr,
|
|
.restart = mpc512x_restart,
|
|
};
|