Add submodule dependency filesHEADmaster

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec

1 files changed, 427 insertions, 0 deletions

diff --git a/roms/u-boot/drivers/pinctrl/pinctrl-uclass.c b/roms/u-boot/drivers/pinctrl/pinctrl-uclass.c
new file mode 100644
index 000000000..6e68e52c3
--- /dev/null
+++ b/roms/u-boot/drivers/pinctrl/pinctrl-uclass.c
@@ -0,0 +1,427 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2015  Masahiro Yamada <yamada.masahiro@socionext.com>
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <asm/global_data.h>
+#include <dm/device_compat.h>
+#include <linux/libfdt.h>
+#include <linux/err.h>
+#include <linux/list.h>
+#include <dm.h>
+#include <dm/lists.h>
+#include <dm/pinctrl.h>
+#include <dm/util.h>
+#include <dm/of_access.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#if CONFIG_IS_ENABLED(PINCTRL_FULL)
+/**
+ * pinctrl_config_one() - apply pinctrl settings for a single node
+ *
+ * @config: pin configuration node
+ * @return: 0 on success, or negative error code on failure
+ */
+static int pinctrl_config_one(struct udevice *config)
+{
+	struct udevice *pctldev;
+	const struct pinctrl_ops *ops;
+
+	pctldev = config;
+	for (;;) {
+		pctldev = dev_get_parent(pctldev);
+		if (!pctldev) {
+			dev_err(config, "could not find pctldev\n");
+			return -EINVAL;
+		}
+		if (pctldev->uclass->uc_drv->id == UCLASS_PINCTRL)
+			break;
+	}
+
+	ops = pinctrl_get_ops(pctldev);
+	return ops->set_state(pctldev, config);
+}
+
+/**
+ * pinctrl_select_state_full() - full implementation of pinctrl_select_state
+ *
+ * @dev: peripheral device
+ * @statename: state name, like "default"
+ * @return: 0 on success, or negative error code on failure
+ */
+static int pinctrl_select_state_full(struct udevice *dev, const char *statename)
+{
+	char propname[32]; /* long enough */
+	const fdt32_t *list;
+	uint32_t phandle;
+	struct udevice *config;
+	int state, size, i, ret;
+
+	state = dev_read_stringlist_search(dev, "pinctrl-names", statename);
+	if (state < 0) {
+		char *end;
+		/*
+		 * If statename is not found in "pinctrl-names",
+		 * assume statename is just the integer state ID.
+		 */
+		state = simple_strtoul(statename, &end, 10);
+		if (*end)
+			return -EINVAL;
+	}
+
+	snprintf(propname, sizeof(propname), "pinctrl-%d", state);
+	list = dev_read_prop(dev, propname, &size);
+	if (!list)
+		return -EINVAL;
+
+	size /= sizeof(*list);
+	for (i = 0; i < size; i++) {
+		phandle = fdt32_to_cpu(*list++);
+		ret = uclass_get_device_by_phandle_id(UCLASS_PINCONFIG, phandle,
+						      &config);
+		if (ret) {
+			dev_warn(dev, "%s: uclass_get_device_by_phandle_id: err=%d\n",
+				__func__, ret);
+			continue;
+		}
+
+		ret = pinctrl_config_one(config);
+		if (ret) {
+			dev_warn(dev, "%s: pinctrl_config_one: err=%d\n",
+				__func__, ret);
+			continue;
+		}
+	}
+
+	return 0;
+}
+
+/**
+ * pinconfig_post_bind() - post binding for PINCONFIG uclass
+ * Recursively bind its children as pinconfig devices.
+ *
+ * @dev: pinconfig device
+ * @return: 0 on success, or negative error code on failure
+ */
+static int pinconfig_post_bind(struct udevice *dev)
+{
+	bool pre_reloc_only = !(gd->flags & GD_FLG_RELOC);
+	const char *name;
+	ofnode node;
+	int ret;
+
+	if (!dev_has_ofnode(dev))
+		return 0;
+
+	dev_for_each_subnode(node, dev) {
+		if (pre_reloc_only &&
+		    !ofnode_pre_reloc(node))
+			continue;
+		/*
+		 * If this node has "compatible" property, this is not
+		 * a pin configuration node, but a normal device. skip.
+		 */
+		ofnode_get_property(node, "compatible", &ret);
+		if (ret >= 0)
+			continue;
+		/* If this node has "gpio-controller" property, skip */
+		if (ofnode_read_bool(node, "gpio-controller"))
+			continue;
+
+		if (ret != -FDT_ERR_NOTFOUND)
+			return ret;
+
+		name = ofnode_get_name(node);
+		if (!name)
+			return -EINVAL;
+		ret = device_bind_driver_to_node(dev, "pinconfig", name,
+						 node, NULL);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+UCLASS_DRIVER(pinconfig) = {
+	.id = UCLASS_PINCONFIG,
+#if CONFIG_IS_ENABLED(PINCONF_RECURSIVE)
+	.post_bind = pinconfig_post_bind,
+#endif
+	.name = "pinconfig",
+};
+
+U_BOOT_DRIVER(pinconfig_generic) = {
+	.name = "pinconfig",
+	.id = UCLASS_PINCONFIG,
+};
+
+#else
+static int pinctrl_select_state_full(struct udevice *dev, const char *statename)
+{
+	return -ENODEV;
+}
+
+static int pinconfig_post_bind(struct udevice *dev)
+{
+	return 0;
+}
+#endif
+
+static int
+pinctrl_gpio_get_pinctrl_and_offset(struct udevice *dev, unsigned offset,
+				    struct udevice **pctldev,
+				    unsigned int *pin_selector)
+{
+	struct ofnode_phandle_args args;
+	unsigned gpio_offset, pfc_base, pfc_pins;
+	int ret;
+
+	ret = dev_read_phandle_with_args(dev, "gpio-ranges", NULL, 3,
+					 0, &args);
+	if (ret) {
+		dev_dbg(dev, "%s: dev_read_phandle_with_args: err=%d\n",
+			__func__, ret);
+		return ret;
+	}
+
+	ret = uclass_get_device_by_ofnode(UCLASS_PINCTRL,
+					  args.node, pctldev);
+	if (ret) {
+		dev_dbg(dev,
+			"%s: uclass_get_device_by_of_offset failed: err=%d\n",
+			__func__, ret);
+		return ret;
+	}
+
+	gpio_offset = args.args[0];
+	pfc_base = args.args[1];
+	pfc_pins = args.args[2];
+
+	if (offset < gpio_offset || offset > gpio_offset + pfc_pins) {
+		dev_dbg(dev,
+			"%s: GPIO can not be mapped to pincontrol pin\n",
+			__func__);
+		return -EINVAL;
+	}
+
+	offset -= gpio_offset;
+	offset += pfc_base;
+	*pin_selector = offset;
+
+	return 0;
+}
+
+/**
+ * pinctrl_gpio_request() - request a single pin to be used as GPIO
+ *
+ * @dev: GPIO peripheral device
+ * @offset: the GPIO pin offset from the GPIO controller
+ * @return: 0 on success, or negative error code on failure
+ */
+int pinctrl_gpio_request(struct udevice *dev, unsigned offset)
+{
+	const struct pinctrl_ops *ops;
+	struct udevice *pctldev;
+	unsigned int pin_selector;
+	int ret;
+
+	ret = pinctrl_gpio_get_pinctrl_and_offset(dev, offset,
+						  &pctldev, &pin_selector);
+	if (ret)
+		return ret;
+
+	ops = pinctrl_get_ops(pctldev);
+	assert(ops);
+	if (!ops->gpio_request_enable)
+		return -ENOSYS;
+
+	return ops->gpio_request_enable(pctldev, pin_selector);
+}
+
+/**
+ * pinctrl_gpio_free() - free a single pin used as GPIO
+ *
+ * @dev: GPIO peripheral device
+ * @offset: the GPIO pin offset from the GPIO controller
+ * @return: 0 on success, or negative error code on failure
+ */
+int pinctrl_gpio_free(struct udevice *dev, unsigned offset)
+{
+	const struct pinctrl_ops *ops;
+	struct udevice *pctldev;
+	unsigned int pin_selector;
+	int ret;
+
+	ret = pinctrl_gpio_get_pinctrl_and_offset(dev, offset,
+						  &pctldev, &pin_selector);
+	if (ret)
+		return ret;
+
+	ops = pinctrl_get_ops(pctldev);
+	assert(ops);
+	if (!ops->gpio_disable_free)
+		return -ENOSYS;
+
+	return ops->gpio_disable_free(pctldev, pin_selector);
+}
+
+/**
+ * pinctrl_select_state_simple() - simple implementation of pinctrl_select_state
+ *
+ * @dev: peripheral device
+ * @return: 0 on success, or negative error code on failure
+ */
+static int pinctrl_select_state_simple(struct udevice *dev)
+{
+	struct udevice *pctldev;
+	struct pinctrl_ops *ops;
+	int ret;
+
+	/*
+	 * For most system, there is only one pincontroller device. But in
+	 * case of multiple pincontroller devices, probe the one with sequence
+	 * number 0 (defined by alias) to avoid race condition.
+	 */
+	ret = uclass_get_device_by_seq(UCLASS_PINCTRL, 0, &pctldev);
+	if (ret)
+		/* if not found, get the first one */
+		ret = uclass_get_device(UCLASS_PINCTRL, 0, &pctldev);
+	if (ret)
+		return ret;
+
+	ops = pinctrl_get_ops(pctldev);
+	if (!ops->set_state_simple) {
+		dev_dbg(dev, "set_state_simple op missing\n");
+		return -ENOSYS;
+	}
+
+	return ops->set_state_simple(pctldev, dev);
+}
+
+int pinctrl_select_state(struct udevice *dev, const char *statename)
+{
+	/*
+	 * Some device which is logical like mmc.blk, do not have
+	 * a valid ofnode.
+	 */
+	if (!dev_has_ofnode(dev))
+		return 0;
+	/*
+	 * Try full-implemented pinctrl first.
+	 * If it fails or is not implemented, try simple one.
+	 */
+	if (pinctrl_select_state_full(dev, statename))
+		return pinctrl_select_state_simple(dev);
+
+	return 0;
+}
+
+int pinctrl_request(struct udevice *dev, int func, int flags)
+{
+	struct pinctrl_ops *ops = pinctrl_get_ops(dev);
+
+	if (!ops->request)
+		return -ENOSYS;
+
+	return ops->request(dev, func, flags);
+}
+
+int pinctrl_request_noflags(struct udevice *dev, int func)
+{
+	return pinctrl_request(dev, func, 0);
+}
+
+int pinctrl_get_periph_id(struct udevice *dev, struct udevice *periph)
+{
+	struct pinctrl_ops *ops = pinctrl_get_ops(dev);
+
+	if (!ops->get_periph_id)
+		return -ENOSYS;
+
+	return ops->get_periph_id(dev, periph);
+}
+
+int pinctrl_get_gpio_mux(struct udevice *dev, int banknum, int index)
+{
+	struct pinctrl_ops *ops = pinctrl_get_ops(dev);
+
+	if (!ops->get_gpio_mux)
+		return -ENOSYS;
+
+	return ops->get_gpio_mux(dev, banknum, index);
+}
+
+int pinctrl_get_pins_count(struct udevice *dev)
+{
+	struct pinctrl_ops *ops = pinctrl_get_ops(dev);
+
+	if (!ops->get_pins_count)
+		return -ENOSYS;
+
+	return ops->get_pins_count(dev);
+}
+
+int pinctrl_get_pin_name(struct udevice *dev, int selector, char *buf,
+			 int size)
+{
+	struct pinctrl_ops *ops = pinctrl_get_ops(dev);
+
+	if (!ops->get_pin_name)
+		return -ENOSYS;
+
+	snprintf(buf, size, ops->get_pin_name(dev, selector));
+
+	return 0;
+}
+
+int pinctrl_get_pin_muxing(struct udevice *dev, int selector, char *buf,
+			   int size)
+{
+	struct pinctrl_ops *ops = pinctrl_get_ops(dev);
+
+	if (!ops->get_pin_muxing)
+		return -ENOSYS;
+
+	return ops->get_pin_muxing(dev, selector, buf, size);
+}
+
+/**
+ * pinconfig_post_bind() - post binding for PINCTRL uclass
+ * Recursively bind child nodes as pinconfig devices in case of full pinctrl.
+ *
+ * @dev: pinctrl device
+ * @return: 0 on success, or negative error code on failure
+ */
+static int __maybe_unused pinctrl_post_bind(struct udevice *dev)
+{
+	const struct pinctrl_ops *ops = pinctrl_get_ops(dev);
+
+	if (!ops) {
+		dev_dbg(dev, "ops is not set.  Do not bind.\n");
+		return -EINVAL;
+	}
+
+	/*
+	 * If set_state callback is set, we assume this pinctrl driver is the
+	 * full implementation.  In this case, its child nodes should be bound
+	 * so that peripheral devices can easily search in parent devices
+	 * during later DT-parsing.
+	 */
+	if (ops->set_state)
+		return pinconfig_post_bind(dev);
+
+	return 0;
+}
+
+UCLASS_DRIVER(pinctrl) = {
+	.id = UCLASS_PINCTRL,
+#if !CONFIG_IS_ENABLED(OF_PLATDATA)
+	.post_bind = pinctrl_post_bind,
+#endif
+	.flags = DM_UC_FLAG_SEQ_ALIAS,
+	.name = "pinctrl",
+};