Example #1
0
static void of_gpiochip_add_pin_range(struct gpio_chip *chip)
{
	struct device_node *np = chip->of_node;
	struct of_phandle_args pinspec;
	struct pinctrl_dev *pctldev;
	int index = 0, ret;

	if (!np)
		return;

	for (;; index++) {
		ret = of_parse_phandle_with_fixed_args(np, "gpio-ranges", 3,
				index, &pinspec);
		if (ret)
			break;

		pctldev = of_pinctrl_get(pinspec.np);
		if (!pctldev)
			break;

		ret = gpiochip_add_pin_range(chip,
					     pinctrl_dev_get_devname(pctldev),
					     pinspec.args[0],
					     pinspec.args[1],
					     pinspec.args[2]);

		if (ret)
			break;
	}
}
Example #2
0
static void of_gpiochip_add_pin_range(struct gpio_chip *chip)
{
	struct device_node *np = chip->of_node;
	struct of_phandle_args pinspec;
	struct pinctrl_dev *pctldev;
	int index = 0, ret;

	if (!np)
		return;

	do {
		ret = of_parse_phandle_with_args(np, "gpio-ranges",
				"#gpio-range-cells", index, &pinspec);
		if (ret)
			break;

		pctldev = of_pinctrl_get(pinspec.np);
		if (!pctldev)
			break;

		/*
		 * This assumes that the n GPIO pins are consecutive in the
		 * GPIO number space, and that the pins are also consecutive
		 * in their local number space. Currently it is not possible
		 * to add different ranges for one and the same GPIO chip,
		 * as the code assumes that we have one consecutive range
		 * on both, mapping 1-to-1.
		 *
		 * TODO: make the OF bindings handle multiple sparse ranges
		 * on the same GPIO chip.
		 */
		ret = gpiochip_add_pin_range(chip,
					     pinctrl_dev_get_name(pctldev),
					     0, /* offset in gpiochip */
					     pinspec.args[0],
					     pinspec.args[1]);

		if (ret)
			break;

	} while (index++);
}
static void of_gpiochip_add_pin_range(struct gpio_chip *chip)
{
	struct device_node *np = chip->of_node;
	struct of_phandle_args pinspec;
	struct pinctrl_dev *pctldev;
	int index = 0, ret;
	const char *name;
	static const char group_names_propname[] = "gpio-ranges-group-names";
	struct property *group_names;

	if (!np)
		return;

	group_names = of_find_property(np, group_names_propname, NULL);

	for (;; index++) {
		ret = of_parse_phandle_with_fixed_args(np, "gpio-ranges", 3,
				index, &pinspec);
		if (ret)
			break;

		pctldev = of_pinctrl_get(pinspec.np);
		if (!pctldev)
			break;

		if (pinspec.args[2]) {
			if (group_names) {
				ret = of_property_read_string_index(np,
						group_names_propname,
						index, &name);
				if (strlen(name)) {
					pr_err("%s: Group name of numeric GPIO ranges must be the empty string.\n",
						np->full_name);
					break;
				}
			}
			/* npins != 0: linear range */
			ret = gpiochip_add_pin_range(chip,
					pinctrl_dev_get_devname(pctldev),
					pinspec.args[0],
					pinspec.args[1],
					pinspec.args[2]);
			if (ret)
				break;
		} else {
			/* npins == 0: special range */
			if (pinspec.args[1]) {
				pr_err("%s: Illegal gpio-range format.\n",
					np->full_name);
				break;
			}

			if (!group_names) {
				pr_err("%s: GPIO group range requested but no %s property.\n",
					np->full_name, group_names_propname);
				break;
			}

			ret = of_property_read_string_index(np,
						group_names_propname,
						index, &name);
			if (ret)
				break;

			if (!strlen(name)) {
				pr_err("%s: Group name of GPIO group range cannot be the empty string.\n",
				np->full_name);
				break;
			}

			ret = gpiochip_add_pingroup_range(chip, pctldev,
						pinspec.args[0], name);
			if (ret)
				break;
		}
	}
}