void __init mx28_cpx2_pins_init(void)
{
mx28_cpx2_init_pin_group(mx28_cpx2_fixed_pins,
ARRAY_SIZE(mx28_cpx2_fixed_pins));
if (enable_ssp1) {
pr_info("Initializing SSP1 pins\n");
mx28_cpx2_init_pin_group(mx28_cpx2_ssp1_pins,
ARRAY_SIZE(mx28_cpx2_ssp1_pins));
} else if (enable_gpmi) {
pr_info("Initializing GPMI pins\n");
mx28_cpx2_init_pin_group(mx28_cpx2_gpmi_pins,
ARRAY_SIZE(mx28_cpx2_gpmi_pins));
}
#if (defined(CONFIG_LEDS_GPIO) || defined(CONFIG_LEDS_GPIO_MODULE)) \
&& (defined (CONFIG_LEDS_GPIO_PLATFORM) || defined (CONFIG_LEDS_GPIO_PLATFORM_MODULE) )
/*
* The CPX2 platform uses GPIO 122 & 123 (aka 3_26 & 3_27) as network green &
* yellow LEDs. These need at least 8mA drive strength. With this config
* option, these pins are registered in mx28_cpx2.c with the leds-gpio
* driver; however, neither the leds-gpio nor gpio drivers support setting the
* drive strength of the GPIO pins; this is only supported in the MXS pinctrl
* code, but if we try to initialize them here with init_pin_group(), this
* routine calls gpio_request() to claim the pins, which then causes the
* leds-gpio driver to fail with EBUSY when it tries to register them also.
*
* Therefore, we manually set the drive strength of these pins here, and
* let the leds-gpio driver call gpio_request(). Note that we must supply
* sysfs = 1 to prevent testing the gpio_request() lock.
*/
mxs_set_strength(PINID_SAIF1_SDATA0, PAD_8MA, 1, NULL); // GPIO 122 / 3_26
mxs_set_strength(PINID_SPDIF, PAD_8MA, 1, NULL); // GPIO 123 / 3_27
#endif
#if defined(CONFIG_SPI_MXS) || defined(CONFIG_SPI_MXS_MODULE)
mx28_cpx2_init_pin_group(mx28_cpx2_spi_pins,
ARRAY_SIZE(mx28_cpx2_spi_pins));
#endif
#if defined(CONFIG_FEC) || defined(CONFIG_FEC_MODULE)\
|| defined(CONFIG_FEC_L2SWITCH)
mx28_cpx2_init_pin_group(mx28_cpx2_eth_pins,
ARRAY_SIZE(mx28_cpx2_eth_pins));
// Take the PHY out of reset
gpio_request(MXS_PIN_TO_GPIO(PINID_PWM4) , "ENET0_RST#");
gpio_direction_output( MXS_PIN_TO_GPIO(PINID_PWM4) , 1 );
#endif
}
static void mxs_request_pins(struct pin_desc *pins, int nr)
{
int i;
struct pin_desc *pin;
/* configure the pins */
for (i = 0; i < nr; i++) {
pin = &pins[i];
if (pin->fun == PIN_GPIO)
gpio_request(MXS_PIN_TO_GPIO(pin->id), pin->name);
else
mxs_request_pin(pin->id, pin->fun, pin->name);
if (pin->drive) {
mxs_set_strength(pin->id, pin->strength, pin->name);
mxs_set_voltage(pin->id, pin->voltage, pin->name);
}
if (pin->pull)
mxs_set_pullup(pin->id, pin->pullup, pin->name);
if (pin->fun == PIN_GPIO) {
if (pin->output)
gpio_direction_output(MXS_PIN_TO_GPIO(pin->id),
pin->data);
else
gpio_direction_input(MXS_PIN_TO_GPIO(pin->id));
}
}
}
void __init mx28evk_init_pin_group(struct pin_desc *pins, unsigned count)
{
int i;
struct pin_desc *pin;
for (i = 0; i < count; i++) {
pin = pins + i;
if (pin->fun == PIN_GPIO)
gpio_request(MXS_PIN_TO_GPIO(pin->id), pin->name);
else
mxs_request_pin(pin->id, pin->fun, pin->name);
if (pin->drive) {
mxs_set_strength(pin->id, pin->strength, pin->name);
mxs_set_voltage(pin->id, pin->voltage, pin->name);
}
if (pin->pull)
mxs_set_pullup(pin->id, pin->pullup, pin->name);
if (pin->fun == PIN_GPIO) {
if (pin->output)
gpio_direction_output(MXS_PIN_TO_GPIO(pin->id),
pin->data);
else
gpio_direction_input(MXS_PIN_TO_GPIO(pin->id));
}
}
}
