+// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
-#include <libfdt.h>
+#include <malloc.h>
+#include <dm/device_compat.h>
+#include <linux/libfdt.h>
#include <linux/err.h>
#include <linux/list.h>
-#include <dm/device.h>
+#include <dm.h>
#include <dm/lists.h>
#include <dm/pinctrl.h>
-#include <dm/uclass.h>
#include <dm/util.h>
+#include <dm/of_access.h>
DECLARE_GLOBAL_DATA_PTR;
-int pinctrl_decode_pin_config(const void *blob, int node)
-{
- int flags = 0;
-
- if (fdtdec_get_bool(blob, node, "bias-pull-up"))
- flags |= 1 << PIN_CONFIG_BIAS_PULL_UP;
- else if (fdtdec_get_bool(blob, node, "bias-pull-down"))
- flags |= 1 << PIN_CONFIG_BIAS_PULL_DOWN;
-
- return flags;
-}
-
#if CONFIG_IS_ENABLED(PINCTRL_FULL)
/**
* pinctrl_config_one() - apply pinctrl settings for a single node
*/
static int pinctrl_select_state_full(struct udevice *dev, const char *statename)
{
- const void *fdt = gd->fdt_blob;
- int node = dev_of_offset(dev);
char propname[32]; /* long enough */
const fdt32_t *list;
uint32_t phandle;
- int config_node;
struct udevice *config;
int state, size, i, ret;
- state = fdt_stringlist_search(fdt, node, "pinctrl-names", statename);
+ state = dev_read_stringlist_search(dev, "pinctrl-names", statename);
if (state < 0) {
char *end;
/*
}
snprintf(propname, sizeof(propname), "pinctrl-%d", state);
- list = fdt_getprop(fdt, node, propname, &size);
+ 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++);
-
- config_node = fdt_node_offset_by_phandle(fdt, phandle);
- if (config_node < 0) {
- dev_err(dev, "prop %s index %d invalid phandle\n",
- propname, i);
- return -EINVAL;
+ 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 = uclass_get_device_by_of_offset(UCLASS_PINCONFIG,
- config_node, &config);
- if (ret)
- return ret;
ret = pinctrl_config_one(config);
- if (ret)
- return ret;
+ if (ret) {
+ dev_warn(dev, "%s: pinctrl_config_one: err=%d\n",
+ __func__, ret);
+ continue;
+ }
}
return 0;
*/
static int pinconfig_post_bind(struct udevice *dev)
{
- const void *fdt = gd->fdt_blob;
- int offset = dev_of_offset(dev);
bool pre_reloc_only = !(gd->flags & GD_FLG_RELOC);
const char *name;
+ ofnode node;
int ret;
- for (offset = fdt_first_subnode(fdt, offset);
- offset > 0;
- offset = fdt_next_subnode(fdt, offset)) {
+ if (!dev_of_valid(dev))
+ return 0;
+
+ dev_for_each_subnode(node, dev) {
if (pre_reloc_only &&
- !dm_fdt_pre_reloc(fdt, offset))
+ !ofnode_pre_reloc(node))
continue;
/*
* If this node has "compatible" property, this is not
* a pin configuration node, but a normal device. skip.
*/
- fdt_get_property(fdt, offset, "compatible", &ret);
+ 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 = fdt_get_name(fdt, offset, NULL);
+ name = ofnode_get_name(node);
if (!name)
return -EINVAL;
ret = device_bind_driver_to_node(dev, "pinconfig", name,
- offset, NULL);
+ node, NULL);
if (ret)
return ret;
}
UCLASS_DRIVER(pinconfig) = {
.id = UCLASS_PINCONFIG,
+#if CONFIG_IS_ENABLED(PINCONF_RECURSIVE)
.post_bind = pinconfig_post_bind,
+#endif
.name = "pinconfig",
};
}
#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);
+ if (!ops || !ops->gpio_request_enable)
+ return -ENOTSUPP;
+
+ 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);
+ if (!ops || !ops->gpio_disable_free)
+ return -ENOTSUPP;
+
+ return ops->gpio_disable_free(pctldev, pin_selector);
+}
+
/**
* pinctrl_select_state_simple() - simple implementation of pinctrl_select_state
*
int ret;
/*
- * For simplicity, assume the first device of PINCTRL uclass
- * is the correct one. This is most likely OK as there is
- * usually only one pinctrl device on the system.
+ * 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(UCLASS_PINCTRL, 0, &pctldev);
+ 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;
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 (!ofnode_valid(dev->node))
+ return 0;
/*
* Try full-implemented pinctrl first.
* If it fails or is not implemented, try simple one.
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 pinctrl_post_bind(struct udevice *dev)
+static int __maybe_unused pinctrl_post_bind(struct udevice *dev)
{
const struct pinctrl_ops *ops = pinctrl_get_ops(dev);
projects / oweals / u-boot.git / blobdiff