static int __init osk_ts_probe(struct omap_ts_t *ts)
{
#ifdef CONFIG_OMAP_OSK_MISTRAL
if (!machine_is_omap_osk())
return -ENODEV;
/* Configure GPIO4 (pin M17 ZDY) as /PENIRQ interrupt input */
omap_cfg_reg(P20_1610_GPIO4);
omap_request_gpio(4);
omap_set_gpio_direction(4, 1);
set_irq_type(OMAP_GPIO_IRQ(4), IRQT_FALLING);
ts->irq = PEN_IRQ;
/* Configure uWire interface. ADS7846 is on CS0 */
omap_uwire_configure_mode(ADS7846_UWIRE_CS, UWIRE_READ_RISING_EDGE |
UWIRE_WRITE_RISING_EDGE |
UWIRE_CS_ACTIVE_LOW |
UWIRE_FREQ_DIV_2);
/* FIXME verify there's really a Mistral board:
* see if the AD7846 chip responds.
*/
/* NOTE: no VREF; must ignore the temp, VBAT, and AUX sensors */
return 0;
#else
return -ENODEV;
#endif
}
/* FIXME: adapt clock divisors for uwire to current ARM xor clock rate */
static int omap_tsc2101_configure(void)
{
unsigned long uwire_flags = 0;
#ifdef CONFIG_MACH_OMAP_H3
int err = 0;
u8 ioExpanderVal = 0;
if ((err = read_gpio_expa(&ioExpanderVal, 0x24))) {
printk(" Error reading from I/O EXPANDER \n");
return err;
}
ioExpanderVal |= 0x8;
if ((err = write_gpio_expa(ioExpanderVal, 0x24))) {
printk(KERN_ERR ": Error writing to I/O EXPANDER \n");
return err;
}
#endif
if (machine_is_omap_h2()) {
uwire_flags = UWIRE_READ_RISING_EDGE | UWIRE_WRITE_RISING_EDGE;
omap_cfg_reg(N15_1610_UWIRE_CS1);
omap_uwire_configure_mode(1, uwire_flags);
}
if (machine_is_omap_h3()) {
uwire_flags = UWIRE_READ_RISING_EDGE | UWIRE_WRITE_RISING_EDGE;
omap_cfg_reg(N14_1610_UWIRE_CS0);
omap_uwire_configure_mode(0, uwire_flags);
}
/* Configure MCLK enable */
omap_writel(omap_readl(PU_PD_SEL_2) | (1 << 22), PU_PD_SEL_2);
return 0;
}