static void i2c_gpio_sda_set(struct gpio_desc *sda, int bit)
{
if (bit) {
dm_gpio_set_dir_flags(sda, GPIOD_IS_IN);
} else {
dm_gpio_set_dir_flags(sda, GPIOD_IS_OUT);
dm_gpio_set_value(sda, 0);
}
}
static void i2c_gpio_set_pin(struct gpio_desc *pin, int bit)
{
if (bit)
dm_gpio_set_dir_flags(pin, GPIOD_IS_IN);
else
dm_gpio_set_dir_flags(pin, GPIOD_IS_OUT |
GPIOD_ACTIVE_LOW |
GPIOD_IS_OUT_ACTIVE);
}
static int atmel_spi_probe(struct udevice *bus)
{
struct atmel_spi_platdata *bus_plat = dev_get_platdata(bus);
struct atmel_spi_priv *priv = dev_get_priv(bus);
int i, ret;
ret = atmel_spi_enable_clk(bus);
if (ret)
return ret;
bus_plat->regs = (struct at91_spi *)dev_get_addr(bus);
ret = gpio_request_list_by_name(bus, "cs-gpios", priv->cs_gpios,
ARRAY_SIZE(priv->cs_gpios), 0);
if (ret < 0) {
error("Can't get %s gpios! Error: %d", bus->name, ret);
return ret;
}
for(i = 0; i < ARRAY_SIZE(priv->cs_gpios); i++) {
dm_gpio_set_dir_flags(&priv->cs_gpios[i],
GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
}
writel(ATMEL_SPI_CR_SWRST, &bus_plat->regs->cr);
return 0;
}
void board_pex_config(void)
{
#ifdef CONFIG_SPL_BUILD
uint k;
struct gpio_desc gpio = {};
if (!request_gpio_by_name(&gpio, "pca9698@22", 31, "fpga-program-gpio")) {
/* prepare FPGA reconfiguration */
dm_gpio_set_dir_flags(&gpio, GPIOD_IS_OUT);
dm_gpio_set_value(&gpio, 0);
/* give lunatic PCIe clock some time to stabilize */
mdelay(500);
/* start FPGA reconfiguration */
dm_gpio_set_dir_flags(&gpio, GPIOD_IS_IN);
}
/* wait for FPGA done */
if (!request_gpio_by_name(&gpio, "pca9698@22", 19, "fpga-done-gpio")) {
for (k = 0; k < 20; ++k) {
if (dm_gpio_get_value(&gpio)) {
printf("FPGA done after %u rounds\n", k);
break;
}
mdelay(100);
}
}
/* disable FPGA reset */
if (!request_gpio_by_name(&gpio, "gpio@18100", 6, "cpu-to-fpga-reset")) {
dm_gpio_set_dir_flags(&gpio, GPIOD_IS_OUT);
dm_gpio_set_value(&gpio, 1);
}
/* wait for FPGA ready */
if (!request_gpio_by_name(&gpio, "pca9698@22", 27, "fpga-ready-gpio")) {
for (k = 0; k < 2; ++k) {
if (!dm_gpio_get_value(&gpio))
break;
mdelay(100);
}
}
#endif
}
static int _gpio_request_by_name_nodev(const void *blob, int node,
const char *list_name, int index,
struct gpio_desc *desc, int flags,
bool add_index)
{
struct fdtdec_phandle_args args;
int ret;
desc->dev = NULL;
desc->offset = 0;
desc->flags = 0;
ret = fdtdec_parse_phandle_with_args(blob, node, list_name,
"#gpio-cells", 0, index, &args);
if (ret) {
debug("%s: fdtdec_parse_phandle_with_args failed\n", __func__);
goto err;
}
ret = uclass_get_device_by_of_offset(UCLASS_GPIO, args.node,
&desc->dev);
if (ret) {
debug("%s: uclass_get_device_by_of_offset failed\n", __func__);
goto err;
}
ret = gpio_find_and_xlate(desc, &args);
if (ret) {
debug("%s: gpio_find_and_xlate failed\n", __func__);
goto err;
}
ret = dm_gpio_requestf(desc, add_index ? "%s.%s%d" : "%s.%s",
fdt_get_name(blob, node, NULL),
list_name, index);
if (ret) {
debug("%s: dm_gpio_requestf failed\n", __func__);
goto err;
}
ret = dm_gpio_set_dir_flags(desc, flags | desc->flags);
if (ret) {
debug("%s: dm_gpio_set_dir failed\n", __func__);
goto err;
}
return 0;
err:
debug("%s: Node '%s', property '%s', failed to request GPIO index %d: %d\n",
__func__, fdt_get_name(blob, node, NULL), list_name, index, ret);
return ret;
}
static int gpio_request_tail(int ret, ofnode node,
struct ofnode_phandle_args *args,
const char *list_name, int index,
struct gpio_desc *desc, int flags, bool add_index)
{
desc->dev = NULL;
desc->offset = 0;
desc->flags = 0;
if (ret)
goto err;
ret = uclass_get_device_by_ofnode(UCLASS_GPIO, args->node,
&desc->dev);
if (ret) {
debug("%s: uclass_get_device_by_of_offset failed\n", __func__);
goto err;
}
ret = gpio_find_and_xlate(desc, args);
if (ret) {
debug("%s: gpio_find_and_xlate failed\n", __func__);
goto err;
}
ret = dm_gpio_requestf(desc, add_index ? "%s.%s%d" : "%s.%s",
ofnode_get_name(node),
list_name, index);
if (ret) {
debug("%s: dm_gpio_requestf failed\n", __func__);
goto err;
}
ret = dm_gpio_set_dir_flags(desc, flags | desc->flags);
if (ret) {
debug("%s: dm_gpio_set_dir failed\n", __func__);
goto err;
}
return 0;
err:
debug("%s: Node '%s', property '%s', failed to request GPIO index %d: %d\n",
__func__, ofnode_get_name(node), list_name, index, ret);
return ret;
}
static int configure_emmc(struct udevice *pinctrl)
{
#if defined(CONFIG_TARGET_CHROMEBOOK_JERRY)
struct gpio_desc desc;
int ret;
pinctrl_request_noflags(pinctrl, PERIPH_ID_EMMC);
/*
* TODO([email protected]): Pick this up from device tree or perhaps
* use the EMMC_PWREN setting.
*/
ret = dm_gpio_lookup_name("D9", &desc);
if (ret) {
debug("gpio ret=%d\n", ret);
return ret;
}
ret = dm_gpio_request(&desc, "emmc_pwren");
if (ret) {
debug("gpio_request ret=%d\n", ret);
return ret;
}
ret = dm_gpio_set_dir_flags(&desc, GPIOD_IS_OUT);
if (ret) {
debug("gpio dir ret=%d\n", ret);
return ret;
}
ret = dm_gpio_set_value(&desc, 1);
if (ret) {
debug("gpio value ret=%d\n", ret);
return ret;
}
#endif
return 0;
}
int dm_gpio_set_dir(struct gpio_desc *desc)
{
return dm_gpio_set_dir_flags(desc, desc->flags);
}
int board_prepare_usb(enum usb_init_type type)
{
static struct udevice *pmic_gpio;
static struct gpio_desc hub_reset, usb_sel;
int ret = 0, node;
if (!pmic_gpio) {
ret = uclass_get_device_by_name(UCLASS_GPIO,
"pm8916_gpios@c000",
&pmic_gpio);
if (ret < 0) {
printf("Failed to find pm8916_gpios@c000 node.\n");
return ret;
}
}
/* Try to request gpios needed to start usb host on dragonboard */
if (!dm_gpio_is_valid(&hub_reset)) {
node = fdt_subnode_offset(gd->fdt_blob,
dev_of_offset(pmic_gpio),
"usb_hub_reset_pm");
if (node < 0) {
printf("Failed to find usb_hub_reset_pm dt node.\n");
return node;
}
ret = gpio_request_by_name_nodev(offset_to_ofnode(node),
"gpios", 0, &hub_reset, 0);
if (ret < 0) {
printf("Failed to request usb_hub_reset_pm gpio.\n");
return ret;
}
}
if (!dm_gpio_is_valid(&usb_sel)) {
node = fdt_subnode_offset(gd->fdt_blob,
dev_of_offset(pmic_gpio),
"usb_sw_sel_pm");
if (node < 0) {
printf("Failed to find usb_sw_sel_pm dt node.\n");
return 0;
}
ret = gpio_request_by_name_nodev(offset_to_ofnode(node),
"gpios", 0, &usb_sel, 0);
if (ret < 0) {
printf("Failed to request usb_sw_sel_pm gpio.\n");
return ret;
}
}
if (type == USB_INIT_HOST) {
/* Start USB Hub */
dm_gpio_set_dir_flags(&hub_reset,
GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
mdelay(100);
/* Switch usb to host connectors */
dm_gpio_set_dir_flags(&usb_sel,
GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
mdelay(100);
} else { /* Device */
/* Disable hub */
dm_gpio_set_dir_flags(&hub_reset, GPIOD_IS_OUT);
/* Switch back to device connector */
dm_gpio_set_dir_flags(&usb_sel, GPIOD_IS_OUT);
}
return 0;
}
static void i2c_gpio_scl_set(struct gpio_desc *scl, int bit)
{
dm_gpio_set_dir_flags(scl, GPIOD_IS_OUT);
dm_gpio_set_value(scl, bit);
}
