now ,i get some problems about bb-xm with touchscreen,theuboot (2010-12) linux kernel 2.6.32 from modified dvsdk4.0.1.
the main core problem is :
linux kernel start ,but it can not detect touchscreen ;i sure i modify some main place refer to other message;
to my suprised ,i find i use a uboot(2010-6) from ubuntu11.04 's uboot which is from bb-xm product ,it can detect touchscreen and works well.
so ,to my understanding ,uboot can not effect linux .
of course , i also hope to what i do that can solve my problem.
that is my touchscreen configure message:
in mach-omap2.c:
#ifdef CONFIG_TOUCHSCREEN_ADS7846
#define OMAP3_BEAGLE_TS_GPIO 162 /* gpio_133 for v1.0 */
#include <plat/mcspi.h>
#include <linux/spi/spi.h>
#include <linux/spi/ads7846.h> //for ads7864 touchscreen
static struct omap2_mcspi_device_config ads7846_mcspi_config = {
.turbo_mode = 0,
.single_channel = 1, /* 0: slave, 1: master */
};
static int ads7846_get_pendown_state(void)
{
return !gpio_get_value(OMAP3_BEAGLE_TS_GPIO);
}
struct ads7846_platform_data ads7846_config = {
.x_max = 0x0fff,
.y_max = 0x0fff,
.x_plate_ohms = 180,
.pressure_max = 255,
.debounce_max = 10,
.debounce_tol = 3,
.debounce_rep = 1,
.get_pendown_state = ads7846_get_pendown_state,
.keep_vref_on = 1,
.settle_delay_usecs = 150,
.wakeup = true,
};
struct spi_board_info omap3beagle_spi_board_info[] = {
[0] = {
.modalias = "ads7846",
.bus_num = 3,
.chip_select = 0,
.max_speed_hz = 1500000,
.controller_data = &ads7846_mcspi_config,
.irq = OMAP_GPIO_IRQ(OMAP3_BEAGLE_TS_GPIO),
.platform_data = &ads7846_config,
},
};
static void ads7846_dev_init(void)
{
printk("Initialize ads7846 touch screen controller\n");
if (gpio_request(OMAP3_BEAGLE_TS_GPIO, "ADS7846 pendown") < 0)
printk(KERN_ERR "can't get ads7846 pen down GPIO\n");
gpio_direction_input(OMAP3_BEAGLE_TS_GPIO);
omap_set_gpio_debounce(OMAP3_BEAGLE_TS_GPIO, 1);
omap_set_gpio_debounce_time(OMAP3_BEAGLE_TS_GPIO, 0xa);
}
#else
static inline void __init ads7846_dev_init(void) { return; }
#endif
static void __init omap3_beagle_init(void)
{
omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
omap3_beagle_init_rev();
omap3_beagle_i2c_init();
if ((omap3_beagle_get_rev() == OMAP3BEAGLE_BOARD_XMAB) ||
(omap3_beagle_get_rev() == OMAP3BEAGLE_BOARD_XMC)) {
gpio_buttons[0].gpio = 4;
}
platform_add_devices(omap3_beagle_devices,
ARRAY_SIZE(omap3_beagle_devices));
spi_register_board_info(omap3beagle_spi_board_info, ARRAY_SIZE(omap3beagle_spi_board_info));//by gzz
omap_serial_init();
static struct regulator_consumer_supply beagle_vio_supply = REGULATOR_SUPPLY("vcc", "spi3.0");
omap_mux_init_gpio(170, OMAP_PIN_INPUT);
gpio_request(170, "DVI_nPD");
/* REVISIT leave DVI powered down until it's needed ... */
gpio_direction_output(170, true);
if(!strcmp(expansionboard_name, "zippy"))
{
printk(KERN_INFO "Beagle expansionboard: initializing enc28j60\n");
omap3beagle_enc28j60_init();
printk(KERN_INFO "Beagle expansionboard: assigning GPIO 141 and 162 to MMC1\n");
mmc[1].gpio_wp = 141;
mmc[1].gpio_cd = 162;
}
if(!strcmp(expansionboard_name, "zippy2"))
{
printk(KERN_INFO "Beagle expansionboard: initializing ks_8851\n");
omap3beagle_ks8851_init();
printk(KERN_INFO "Beagle expansionboard: assigning GPIO 141 and 162 to MMC1\n");
mmc[1].gpio_wp = 141;
mmc[1].gpio_cd = 162;
}
if(!strcmp(expansionboard_name, "trainer"))
{
printk(KERN_INFO "Beagle expansionboard: exporting GPIOs 130-141,162 to userspace\n");
gpio_request(130, "sysfs");
gpio_export(130, 1);
gpio_request(131, "sysfs");
gpio_export(131, 1);
gpio_request(132, "sysfs");
gpio_export(132, 1);
gpio_request(133, "sysfs");
gpio_export(133, 1);
gpio_request(134, "sysfs");
gpio_export(134, 1);
gpio_request(135, "sysfs");
gpio_export(135, 1);
gpio_request(136, "sysfs");
gpio_export(136, 1);
gpio_request(137, "sysfs");
gpio_export(137, 1);
gpio_request(138, "sysfs");
gpio_export(138, 1);
gpio_request(139, "sysfs");
gpio_export(139, 1);
gpio_request(140, "sysfs");
gpio_export(140, 1);
gpio_request(141, "sysfs");
gpio_export(141, 1);
gpio_request(162, "sysfs");
gpio_export(162, 1);
}
if(!strcmp(expansionboard_name, "beaglefpga"))
{
printk(KERN_INFO "Beagle expansionboard: Using McSPI for SPI\n");
beaglefpga_init_spi();
}
usb_musb_init();
usb_ehci_init(&ehci_pdata);
omap3beagle_flash_init();
ads7846_dev_init();//bg gzz
/* Ensure SDRC pins are mux'd for self-refresh */
omap_mux_init_signal("sdrc_cke0", OMAP_PIN_OUTPUT);
omap_mux_init_signal("sdrc_cke1", OMAP_PIN_OUTPUT);
beagle_display_init();
}
help me ,thank you!!!,is it the uboot problem or linux ???
