static int imx_chipidea_probe_dt(struct imx_chipidea *ci)
{
const void *out_args;
struct device_node *usbmisc_np;
enum usb_dr_mode mode;
enum usb_phy_interface phymode;
of_parse_phandles_with_args(ci->dev->device_node, "fsl,usbmisc",
"#index-cells", 0, &usbmisc_np, &out_args);
ci->portno = be32_to_cpup(out_args);
ci->flags = MXC_EHCI_MODE_UTMI_8BIT;
mode = of_usb_get_dr_mode(ci->dev->device_node, NULL);
switch (mode) {
case USB_DR_MODE_HOST:
default:
ci->mode = IMX_USB_MODE_HOST;
break;
case USB_DR_MODE_PERIPHERAL:
ci->mode = IMX_USB_MODE_DEVICE;
break;
}
phymode = of_usb_get_phy_mode(ci->dev->device_node, NULL);
switch (phymode) {
case USBPHY_INTERFACE_MODE_UTMI:
ci->flags = MXC_EHCI_MODE_UTMI_8BIT;
break;
case USBPHY_INTERFACE_MODE_UTMIW:
ci->flags = MXC_EHCI_MODE_UTMI_16_BIT;
break;
case USBPHY_INTERFACE_MODE_ULPI:
ci->flags = MXC_EHCI_MODE_ULPI;
break;
case USBPHY_INTERFACE_MODE_SERIAL:
ci->flags = MXC_EHCI_MODE_SERIAL;
break;
case USBPHY_INTERFACE_MODE_HSIC:
ci->flags = MXC_EHCI_MODE_HSIC;
break;
default:
dev_err(ci->dev, "no or invalid phy mode setting\n");
return -EINVAL;
}
if (of_find_property(ci->dev->device_node, "disable-over-current"))
ci->flags |= MXC_EHCI_DISABLE_OVERCURRENT;
return 0;
}
/**
* of_get_named_gpio_flags() - Get a GPIO number and flags to use with GPIO API
* @np: device node to get GPIO from
* @propname: property name containing gpio specifier(s)
* @index: index of the GPIO
* @flags: a flags pointer to fill in
*
* Returns GPIO number to use with Linux generic GPIO API, or one of the errno
* value on the error condition. If @flags is not NULL the function also fills
* in flags for the GPIO.
*/
int of_get_named_gpio_flags(struct device_node *np, const char *propname,
int index, enum of_gpio_flags *flags)
{
int ret;
struct device_node *gpio_np;
struct gpio_chip *gc;
int size;
const void *gpio_spec;
const __be32 *gpio_cells;
ret = of_parse_phandles_with_args(np, propname, "#gpio-cells", index,
&gpio_np, &gpio_spec);
if (ret) {
pr_debug("%s: can't parse gpios property\n", __func__);
goto err0;
}
gc = of_node_to_gpiochip(gpio_np);
if (!gc) {
pr_debug("%s: gpio controller %s isn't registered\n",
np->full_name, gpio_np->full_name);
ret = -ENODEV;
goto err1;
}
gpio_cells = of_get_property(gpio_np, "#gpio-cells", &size);
if (!gpio_cells || size != sizeof(*gpio_cells) ||
be32_to_cpup(gpio_cells) != gc->of_gpio_n_cells) {
pr_debug("%s: wrong #gpio-cells for %s\n",
np->full_name, gpio_np->full_name);
ret = -EINVAL;
goto err1;
}
/* .xlate might decide to not fill in the flags, so clear it. */
if (flags)
*flags = 0;
ret = gc->of_xlate(gc, np, gpio_spec, flags);
if (ret < 0)
goto err1;
ret += gc->base;
err1:
of_node_put(gpio_np);
err0:
pr_debug("%s exited with status %d\n", __func__, ret);
return ret;
}
/**
* of_gpio_count - Count GPIOs for a device
* @np: device node to count GPIOs for
*
* The function returns the count of GPIOs specified for a node.
*
* Note that the empty GPIO specifiers counts too. For example,
*
* gpios = <0
* &pio1 1 2
* 0
* &pio2 3 4>;
*
* defines four GPIOs (so this function will return 4), two of which
* are not specified.
*/
unsigned int of_gpio_count(struct device_node *np)
{
unsigned int cnt = 0;
do {
int ret;
ret = of_parse_phandles_with_args(np, "gpios", "#gpio-cells",
cnt, NULL, NULL);
/* A hole in the gpios = <> counts anyway. */
if (ret < 0 && ret != -EEXIST)
break;
} while (++cnt);
return cnt;
}
static int of_reset_gpio_handle(void)
{
int ret; /* variable which stored handle reset gpio pin */
struct device_node *root; /* root node */
struct device_node *gpio; /* gpio node */
struct gpio_chip *gc;
u32 flags;
const void *gpio_spec;
/* find out root node */
root = of_find_node_by_path("/");
/* give me handle for gpio node to be possible allocate pin */
ret = of_parse_phandles_with_args(root, "hard-reset-gpios",
"#gpio-cells", 0, &gpio, &gpio_spec);
if (ret) {
pr_debug("%s: can't parse gpios property\n", __func__);
goto err0;
}
gc = of_node_to_gpiochip(gpio);
if (!gc) {
pr_debug("%s: gpio controller %s isn't registered\n",
root->full_name, gpio->full_name);
ret = -ENODEV;
goto err1;
}
ret = gc->of_xlate(gc, root, gpio_spec, &flags);
if (ret < 0)
goto err1;
ret += gc->base;
err1:
of_node_put(gpio);
err0:
pr_debug("%s exited with status %d\n", __func__, ret);
return ret;
}
