+// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2013 Google, Inc
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
+#include <dm/device-internal.h>
+#include <dm/lists.h>
+#include <dm/uclass-internal.h>
+#include <dt-bindings/gpio/gpio.h>
#include <errno.h>
+#include <fdtdec.h>
#include <malloc.h>
#include <asm/gpio.h>
+#include <linux/bug.h>
#include <linux/ctype.h>
+DECLARE_GLOBAL_DATA_PTR;
+
/**
* gpio_to_device() - Convert global GPIO number to device, number
- * gpio: The numeric representation of the GPIO
*
* Convert the GPIO number to an entry in the list of GPIOs
* or GPIO blocks registered with the GPIO controller. Returns
* entry on success, NULL on error.
+ *
+ * @gpio: The numeric representation of the GPIO
+ * @desc: Returns description (desc->flags will always be 0)
+ * @return 0 if found, -ENOENT if not found
*/
-static int gpio_to_device(unsigned int gpio, struct udevice **devp,
- unsigned int *offset)
+static int gpio_to_device(unsigned int gpio, struct gpio_desc *desc)
{
struct gpio_dev_priv *uc_priv;
struct udevice *dev;
for (ret = uclass_first_device(UCLASS_GPIO, &dev);
dev;
ret = uclass_next_device(&dev)) {
- uc_priv = dev->uclass_priv;
+ uc_priv = dev_get_uclass_priv(dev);
if (gpio >= uc_priv->gpio_base &&
gpio < uc_priv->gpio_base + uc_priv->gpio_count) {
- *devp = dev;
- *offset = gpio - uc_priv->gpio_base;
+ desc->dev = dev;
+ desc->offset = gpio - uc_priv->gpio_base;
+ desc->flags = 0;
return 0;
}
}
/* No such GPIO */
- return ret ? ret : -EINVAL;
+ return ret ? ret : -ENOENT;
}
-int gpio_lookup_name(const char *name, struct udevice **devp,
- unsigned int *offsetp, unsigned int *gpiop)
+int dm_gpio_lookup_name(const char *name, struct gpio_desc *desc)
{
struct gpio_dev_priv *uc_priv = NULL;
struct udevice *dev;
int numeric;
int ret;
- if (devp)
- *devp = NULL;
numeric = isdigit(*name) ? simple_strtoul(name, NULL, 10) : -1;
for (ret = uclass_first_device(UCLASS_GPIO, &dev);
dev;
ret = uclass_next_device(&dev)) {
int len;
- uc_priv = dev->uclass_priv;
+ uc_priv = dev_get_uclass_priv(dev);
if (numeric != -1) {
offset = numeric - uc_priv->gpio_base;
/* Allow GPIOs to be numbered from 0 */
- if (offset >= 0 && offset < uc_priv->gpio_count)
+ if (offset < uc_priv->gpio_count)
break;
}
if (!dev)
return ret ? ret : -EINVAL;
+ desc->dev = dev;
+ desc->offset = offset;
+
+ return 0;
+}
+
+int gpio_lookup_name(const char *name, struct udevice **devp,
+ unsigned int *offsetp, unsigned int *gpiop)
+{
+ struct gpio_desc desc;
+ int ret;
+
+ if (devp)
+ *devp = NULL;
+ ret = dm_gpio_lookup_name(name, &desc);
+ if (ret)
+ return ret;
+
if (devp)
- *devp = dev;
+ *devp = desc.dev;
if (offsetp)
- *offsetp = offset;
- if (gpiop)
- *gpiop = uc_priv->gpio_base + offset;
+ *offsetp = desc.offset;
+ if (gpiop) {
+ struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(desc.dev);
+
+ *gpiop = uc_priv->gpio_base + desc.offset;
+ }
+
+ return 0;
+}
+
+int gpio_xlate_offs_flags(struct udevice *dev, struct gpio_desc *desc,
+ struct ofnode_phandle_args *args)
+{
+ if (args->args_count < 1)
+ return -EINVAL;
+
+ desc->offset = args->args[0];
+
+ if (args->args_count < 2)
+ return 0;
+
+ if (args->args[1] & GPIO_ACTIVE_LOW)
+ desc->flags = GPIOD_ACTIVE_LOW;
+
+ return 0;
+}
+
+static int gpio_find_and_xlate(struct gpio_desc *desc,
+ struct ofnode_phandle_args *args)
+{
+ struct dm_gpio_ops *ops = gpio_get_ops(desc->dev);
+
+ if (ops->xlate)
+ return ops->xlate(desc->dev, desc, args);
+ else
+ return gpio_xlate_offs_flags(desc->dev, desc, args);
+}
+
+#if defined(CONFIG_DM_GPIO_HOG)
+
+struct gpio_hog_priv {
+ struct gpio_desc gpiod;
+};
+
+struct gpio_hog_data {
+ int gpiod_flags;
+ int value;
+ u32 val[2];
+};
+
+static int gpio_hog_ofdata_to_platdata(struct udevice *dev)
+{
+ struct gpio_hog_data *plat = dev_get_platdata(dev);
+ const char *nodename;
+ int ret;
+
+ plat->value = 0;
+ if (dev_read_bool(dev, "input")) {
+ plat->gpiod_flags = GPIOD_IS_IN;
+ } else if (dev_read_bool(dev, "output-high")) {
+ plat->value = 1;
+ plat->gpiod_flags = GPIOD_IS_OUT;
+ } else if (dev_read_bool(dev, "output-low")) {
+ plat->gpiod_flags = GPIOD_IS_OUT;
+ } else {
+ printf("%s: missing gpio-hog state.\n", __func__);
+ return -EINVAL;
+ }
+ ret = dev_read_u32_array(dev, "gpios", plat->val, 2);
+ if (ret) {
+ printf("%s: wrong gpios property, 2 values needed %d\n",
+ __func__, ret);
+ return ret;
+ }
+ nodename = dev_read_string(dev, "line-name");
+ if (!nodename)
+ nodename = dev_read_name(dev);
+ device_set_name(dev, nodename);
+
+ return 0;
+}
+
+static int gpio_hog_probe(struct udevice *dev)
+{
+ struct gpio_hog_data *plat = dev_get_platdata(dev);
+ struct gpio_hog_priv *priv = dev_get_priv(dev);
+ int ret;
+
+ ret = gpio_dev_request_index(dev->parent, dev->name, "gpio-hog",
+ plat->val[0], plat->gpiod_flags,
+ plat->val[1], &priv->gpiod);
+ if (ret < 0) {
+ debug("%s: node %s could not get gpio.\n", __func__,
+ dev->name);
+ return ret;
+ }
+ dm_gpio_set_dir(&priv->gpiod);
+ if (plat->gpiod_flags == GPIOD_IS_OUT)
+ dm_gpio_set_value(&priv->gpiod, plat->value);
+
+ return 0;
+}
+
+int gpio_hog_probe_all(void)
+{
+ struct udevice *dev;
+ int ret;
+
+ for (uclass_first_device(UCLASS_NOP, &dev);
+ dev;
+ uclass_find_next_device(&dev)) {
+ if (dev->driver == DM_GET_DRIVER(gpio_hog)) {
+ ret = device_probe(dev);
+ if (ret)
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+struct gpio_desc *gpio_hog_lookup_name(const char *name)
+{
+ struct udevice *dev;
+
+ gpio_hog_probe_all();
+ if (!uclass_get_device_by_name(UCLASS_NOP, name, &dev)) {
+ struct gpio_hog_priv *priv = dev_get_priv(dev);
+
+ return &priv->gpiod;
+ }
+
+ return NULL;
+}
+
+U_BOOT_DRIVER(gpio_hog) = {
+ .name = "gpio_hog",
+ .id = UCLASS_NOP,
+ .ofdata_to_platdata = gpio_hog_ofdata_to_platdata,
+ .probe = gpio_hog_probe,
+ .priv_auto_alloc_size = sizeof(struct gpio_hog_priv),
+ .platdata_auto_alloc_size = sizeof(struct gpio_hog_data),
+};
+#else
+struct gpio_desc *gpio_hog_lookup_name(const char *name)
+{
+ return NULL;
+}
+#endif
+
+int dm_gpio_request(struct gpio_desc *desc, const char *label)
+{
+ struct udevice *dev = desc->dev;
+ struct gpio_dev_priv *uc_priv;
+ char *str;
+ int ret;
+
+ uc_priv = dev_get_uclass_priv(dev);
+ if (uc_priv->name[desc->offset])
+ return -EBUSY;
+ str = strdup(label);
+ if (!str)
+ return -ENOMEM;
+ if (gpio_get_ops(dev)->request) {
+ ret = gpio_get_ops(dev)->request(dev, desc->offset, label);
+ if (ret) {
+ free(str);
+ return ret;
+ }
+ }
+ uc_priv->name[desc->offset] = str;
return 0;
}
+static int dm_gpio_requestf(struct gpio_desc *desc, const char *fmt, ...)
+{
+#if !defined(CONFIG_SPL_BUILD) || !defined(CONFIG_USE_TINY_PRINTF)
+ va_list args;
+ char buf[40];
+
+ va_start(args, fmt);
+ vscnprintf(buf, sizeof(buf), fmt, args);
+ va_end(args);
+ return dm_gpio_request(desc, buf);
+#else
+ return dm_gpio_request(desc, fmt);
+#endif
+}
+
/**
* gpio_request() - [COMPAT] Request GPIO
* gpio: GPIO number
*/
int gpio_request(unsigned gpio, const char *label)
{
- struct gpio_dev_priv *uc_priv;
- unsigned int offset;
- struct udevice *dev;
- char *str;
+ struct gpio_desc desc;
int ret;
- ret = gpio_to_device(gpio, &dev, &offset);
+ ret = gpio_to_device(gpio, &desc);
if (ret)
return ret;
- uc_priv = dev->uclass_priv;
- if (uc_priv->name[offset])
- return -EBUSY;
- str = strdup(label);
- if (!str)
- return -ENOMEM;
- if (gpio_get_ops(dev)->request) {
- ret = gpio_get_ops(dev)->request(dev, offset, label);
- if (ret) {
- free(str);
- return ret;
- }
- }
- uc_priv->name[offset] = str;
-
- return 0;
+ return dm_gpio_request(&desc, label);
}
/**
*/
int gpio_requestf(unsigned gpio, const char *fmt, ...)
{
+#if !defined(CONFIG_SPL_BUILD) || !defined(CONFIG_USE_TINY_PRINTF)
va_list args;
char buf[40];
vscnprintf(buf, sizeof(buf), fmt, args);
va_end(args);
return gpio_request(gpio, buf);
+#else
+ return gpio_request(gpio, fmt);
+#endif
}
-/**
- * gpio_free() - [COMPAT] Relinquish GPIO
- * gpio: GPIO number
- *
- * This function implements the API that's compatible with current
- * GPIO API used in U-Boot. The request is forwarded to particular
- * GPIO driver. Returns 0 on success, negative value on error.
- */
-int gpio_free(unsigned gpio)
+int _dm_gpio_free(struct udevice *dev, uint offset)
{
struct gpio_dev_priv *uc_priv;
- unsigned int offset;
- struct udevice *dev;
int ret;
- ret = gpio_to_device(gpio, &dev, &offset);
- if (ret)
- return ret;
-
- uc_priv = dev->uclass_priv;
+ uc_priv = dev_get_uclass_priv(dev);
if (!uc_priv->name[offset])
return -ENXIO;
if (gpio_get_ops(dev)->free) {
return 0;
}
-static int check_reserved(struct udevice *dev, unsigned offset,
- const char *func)
+/**
+ * gpio_free() - [COMPAT] Relinquish GPIO
+ * gpio: GPIO number
+ *
+ * This function implements the API that's compatible with current
+ * GPIO API used in U-Boot. The request is forwarded to particular
+ * GPIO driver. Returns 0 on success, negative value on error.
+ */
+int gpio_free(unsigned gpio)
+{
+ struct gpio_desc desc;
+ int ret;
+
+ ret = gpio_to_device(gpio, &desc);
+ if (ret)
+ return ret;
+
+ return _dm_gpio_free(desc.dev, desc.offset);
+}
+
+static int check_reserved(const struct gpio_desc *desc, const char *func)
{
- struct gpio_dev_priv *uc_priv = dev->uclass_priv;
+ struct gpio_dev_priv *uc_priv;
+
+ if (!dm_gpio_is_valid(desc))
+ return -ENOENT;
- if (!uc_priv->name[offset]) {
+ uc_priv = dev_get_uclass_priv(desc->dev);
+ if (!uc_priv->name[desc->offset]) {
printf("%s: %s: error: gpio %s%d not reserved\n",
- dev->name, func,
- uc_priv->bank_name ? uc_priv->bank_name : "", offset);
+ desc->dev->name, func,
+ uc_priv->bank_name ? uc_priv->bank_name : "",
+ desc->offset);
return -EBUSY;
}
*/
int gpio_direction_input(unsigned gpio)
{
- unsigned int offset;
- struct udevice *dev;
+ struct gpio_desc desc;
int ret;
- ret = gpio_to_device(gpio, &dev, &offset);
+ ret = gpio_to_device(gpio, &desc);
+ if (ret)
+ return ret;
+ ret = check_reserved(&desc, "dir_input");
if (ret)
return ret;
- ret = check_reserved(dev, offset, "dir_input");
- return ret ? ret : gpio_get_ops(dev)->direction_input(dev, offset);
+ return gpio_get_ops(desc.dev)->direction_input(desc.dev, desc.offset);
}
/**
*/
int gpio_direction_output(unsigned gpio, int value)
{
- unsigned int offset;
- struct udevice *dev;
+ struct gpio_desc desc;
int ret;
- ret = gpio_to_device(gpio, &dev, &offset);
+ ret = gpio_to_device(gpio, &desc);
+ if (ret)
+ return ret;
+ ret = check_reserved(&desc, "dir_output");
if (ret)
return ret;
- ret = check_reserved(dev, offset, "dir_output");
- return ret ? ret :
- gpio_get_ops(dev)->direction_output(dev, offset, value);
+ return gpio_get_ops(desc.dev)->direction_output(desc.dev,
+ desc.offset, value);
+}
+
+int dm_gpio_get_value(const struct gpio_desc *desc)
+{
+ int value;
+ int ret;
+
+ ret = check_reserved(desc, "get_value");
+ if (ret)
+ return ret;
+
+ value = gpio_get_ops(desc->dev)->get_value(desc->dev, desc->offset);
+
+ return desc->flags & GPIOD_ACTIVE_LOW ? !value : value;
+}
+
+int dm_gpio_set_value(const struct gpio_desc *desc, int value)
+{
+ int ret;
+
+ ret = check_reserved(desc, "set_value");
+ if (ret)
+ return ret;
+
+ if (desc->flags & GPIOD_ACTIVE_LOW)
+ value = !value;
+ gpio_get_ops(desc->dev)->set_value(desc->dev, desc->offset, value);
+ return 0;
+}
+
+int dm_gpio_get_open_drain(struct gpio_desc *desc)
+{
+ struct dm_gpio_ops *ops = gpio_get_ops(desc->dev);
+ int ret;
+
+ ret = check_reserved(desc, "get_open_drain");
+ if (ret)
+ return ret;
+
+ if (ops->set_open_drain)
+ return ops->get_open_drain(desc->dev, desc->offset);
+ else
+ return -ENOSYS;
+}
+
+int dm_gpio_set_open_drain(struct gpio_desc *desc, int value)
+{
+ struct dm_gpio_ops *ops = gpio_get_ops(desc->dev);
+ int ret;
+
+ ret = check_reserved(desc, "set_open_drain");
+ if (ret)
+ return ret;
+
+ if (ops->set_open_drain)
+ ret = ops->set_open_drain(desc->dev, desc->offset, value);
+ else
+ return 0; /* feature not supported -> ignore setting */
+
+ return ret;
+}
+
+int dm_gpio_set_dir_flags(struct gpio_desc *desc, ulong flags)
+{
+ struct udevice *dev = desc->dev;
+ struct dm_gpio_ops *ops = gpio_get_ops(dev);
+ int ret;
+
+ ret = check_reserved(desc, "set_dir");
+ if (ret)
+ return ret;
+
+ if (flags & GPIOD_IS_OUT) {
+ int value = flags & GPIOD_IS_OUT_ACTIVE ? 1 : 0;
+
+ if (flags & GPIOD_ACTIVE_LOW)
+ value = !value;
+ ret = ops->direction_output(dev, desc->offset, value);
+ } else if (flags & GPIOD_IS_IN) {
+ ret = ops->direction_input(dev, desc->offset);
+ }
+ if (ret)
+ return ret;
+ /*
+ * Update desc->flags here, so that GPIO_ACTIVE_LOW is honoured in
+ * futures
+ */
+ desc->flags = flags;
+
+ return 0;
+}
+
+int dm_gpio_set_dir(struct gpio_desc *desc)
+{
+ return dm_gpio_set_dir_flags(desc, desc->flags);
}
/**
*/
int gpio_get_value(unsigned gpio)
{
- unsigned int offset;
- struct udevice *dev;
int ret;
- ret = gpio_to_device(gpio, &dev, &offset);
+ struct gpio_desc desc;
+
+ ret = gpio_to_device(gpio, &desc);
if (ret)
return ret;
- ret = check_reserved(dev, offset, "get_value");
-
- return ret ? ret : gpio_get_ops(dev)->get_value(dev, offset);
+ return dm_gpio_get_value(&desc);
}
/**
*/
int gpio_set_value(unsigned gpio, int value)
{
- unsigned int offset;
- struct udevice *dev;
+ struct gpio_desc desc;
int ret;
- ret = gpio_to_device(gpio, &dev, &offset);
+ ret = gpio_to_device(gpio, &desc);
if (ret)
return ret;
- ret = check_reserved(dev, offset, "set_value");
-
- return ret ? ret : gpio_get_ops(dev)->set_value(dev, offset, value);
+ return dm_gpio_set_value(&desc, value);
}
const char *gpio_get_bank_info(struct udevice *dev, int *bit_count)
struct gpio_dev_priv *priv;
/* Must be called on an active device */
- priv = dev->uclass_priv;
+ priv = dev_get_uclass_priv(dev);
assert(priv);
*bit_count = priv->gpio_count;
"func",
};
-int get_function(struct udevice *dev, int offset, bool skip_unused,
- const char **namep)
+static int get_function(struct udevice *dev, int offset, bool skip_unused,
+ const char **namep)
{
- struct gpio_dev_priv *uc_priv = dev->uclass_priv;
+ struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
struct dm_gpio_ops *ops = gpio_get_ops(dev);
BUILD_BUG_ON(GPIOF_COUNT != ARRAY_SIZE(gpio_function));
BUILD_BUG_ON(GPIOF_COUNT != ARRAY_SIZE(gpio_function));
*buf = 0;
- priv = dev->uclass_priv;
+ priv = dev_get_uclass_priv(dev);
ret = gpio_get_raw_function(dev, offset, NULL);
if (ret < 0)
return ret;
return 0;
}
+int gpio_claim_vector(const int *gpio_num_array, const char *fmt)
+{
+ int i, ret;
+ int gpio;
+
+ for (i = 0; i < 32; i++) {
+ gpio = gpio_num_array[i];
+ if (gpio == -1)
+ break;
+ ret = gpio_requestf(gpio, fmt, i);
+ if (ret)
+ goto err;
+ ret = gpio_direction_input(gpio);
+ if (ret) {
+ gpio_free(gpio);
+ goto err;
+ }
+ }
+
+ return 0;
+err:
+ for (i--; i >= 0; i--)
+ gpio_free(gpio_num_array[i]);
+
+ return ret;
+}
+
/*
* get a number comprised of multiple GPIO values. gpio_num_array points to
* the array of gpio pin numbers to scan, terminated by -1.
*/
-unsigned gpio_get_values_as_int(const int *gpio_num_array)
+int gpio_get_values_as_int(const int *gpio_list)
{
int gpio;
unsigned bitmask = 1;
unsigned vector = 0;
+ int ret;
while (bitmask &&
- ((gpio = *gpio_num_array++) != -1)) {
- if (gpio_get_value(gpio))
+ ((gpio = *gpio_list++) != -1)) {
+ ret = gpio_get_value(gpio);
+ if (ret < 0)
+ return ret;
+ else if (ret)
vector |= bitmask;
bitmask <<= 1;
}
+
return vector;
}
+int dm_gpio_get_values_as_int(const struct gpio_desc *desc_list, int count)
+{
+ unsigned bitmask = 1;
+ unsigned vector = 0;
+ int ret, i;
+
+ for (i = 0; i < count; i++) {
+ ret = dm_gpio_get_value(&desc_list[i]);
+ if (ret < 0)
+ return ret;
+ else if (ret)
+ vector |= bitmask;
+ bitmask <<= 1;
+ }
+
+ return vector;
+}
+
+static int gpio_request_tail(int ret, const char *nodename,
+ struct ofnode_phandle_args *args,
+ const char *list_name, int index,
+ struct gpio_desc *desc, int flags,
+ bool add_index, struct udevice *dev)
+{
+ desc->dev = dev;
+ desc->offset = 0;
+ desc->flags = 0;
+ if (ret)
+ goto err;
+
+ if (!desc->dev) {
+ ret = uclass_get_device_by_ofnode(UCLASS_GPIO, args->node,
+ &desc->dev);
+ if (ret) {
+ debug("%s: uclass_get_device_by_ofnode 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",
+ nodename, 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__, nodename, list_name, index, ret);
+ return ret;
+}
+
+static int _gpio_request_by_name_nodev(ofnode node, const char *list_name,
+ int index, struct gpio_desc *desc,
+ int flags, bool add_index)
+{
+ struct ofnode_phandle_args args;
+ int ret;
+
+ ret = ofnode_parse_phandle_with_args(node, list_name, "#gpio-cells", 0,
+ index, &args);
+
+ return gpio_request_tail(ret, ofnode_get_name(node), &args, list_name,
+ index, desc, flags, add_index, NULL);
+}
+
+int gpio_request_by_name_nodev(ofnode node, const char *list_name, int index,
+ struct gpio_desc *desc, int flags)
+{
+ return _gpio_request_by_name_nodev(node, list_name, index, desc, flags,
+ index > 0);
+}
+
+int gpio_request_by_name(struct udevice *dev, const char *list_name, int index,
+ struct gpio_desc *desc, int flags)
+{
+ struct ofnode_phandle_args args;
+ ofnode node;
+ int ret;
+
+ ret = dev_read_phandle_with_args(dev, list_name, "#gpio-cells", 0,
+ index, &args);
+ node = dev_ofnode(dev);
+ return gpio_request_tail(ret, ofnode_get_name(node), &args, list_name,
+ index, desc, flags, index > 0, NULL);
+}
+
+int gpio_request_list_by_name_nodev(ofnode node, const char *list_name,
+ struct gpio_desc *desc, int max_count,
+ int flags)
+{
+ int count;
+ int ret;
+
+ for (count = 0; count < max_count; count++) {
+ ret = _gpio_request_by_name_nodev(node, list_name, count,
+ &desc[count], flags, true);
+ if (ret == -ENOENT)
+ break;
+ else if (ret)
+ goto err;
+ }
+
+ /* We ran out of GPIOs in the list */
+ return count;
+
+err:
+ gpio_free_list_nodev(desc, count - 1);
+
+ return ret;
+}
+
+int gpio_request_list_by_name(struct udevice *dev, const char *list_name,
+ struct gpio_desc *desc, int max_count,
+ int flags)
+{
+ /*
+ * This isn't ideal since we don't use dev->name in the debug()
+ * calls in gpio_request_by_name(), but we can do this until
+ * gpio_request_list_by_name_nodev() can be dropped.
+ */
+ return gpio_request_list_by_name_nodev(dev_ofnode(dev), list_name, desc,
+ max_count, flags);
+}
+
+int gpio_get_list_count(struct udevice *dev, const char *list_name)
+{
+ int ret;
+
+ ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, dev_of_offset(dev),
+ list_name, "#gpio-cells", 0, -1,
+ NULL);
+ if (ret) {
+ debug("%s: Node '%s', property '%s', GPIO count failed: %d\n",
+ __func__, dev->name, list_name, ret);
+ }
+
+ return ret;
+}
+
+int dm_gpio_free(struct udevice *dev, struct gpio_desc *desc)
+{
+ /* For now, we don't do any checking of dev */
+ return _dm_gpio_free(desc->dev, desc->offset);
+}
+
+int gpio_free_list(struct udevice *dev, struct gpio_desc *desc, int count)
+{
+ int i;
+
+ /* For now, we don't do any checking of dev */
+ for (i = 0; i < count; i++)
+ dm_gpio_free(dev, &desc[i]);
+
+ return 0;
+}
+
+int gpio_free_list_nodev(struct gpio_desc *desc, int count)
+{
+ return gpio_free_list(NULL, desc, count);
+}
+
/* We need to renumber the GPIOs when any driver is probed/removed */
static int gpio_renumber(struct udevice *removed_dev)
{
base = 0;
uclass_foreach_dev(dev, uc) {
if (device_active(dev) && dev != removed_dev) {
- uc_priv = dev->uclass_priv;
+ uc_priv = dev_get_uclass_priv(dev);
uc_priv->gpio_base = base;
base += uc_priv->gpio_count;
}
return 0;
}
+int gpio_get_number(const struct gpio_desc *desc)
+{
+ struct udevice *dev = desc->dev;
+ struct gpio_dev_priv *uc_priv;
+
+ if (!dev)
+ return -1;
+ uc_priv = dev->uclass_priv;
+
+ return uc_priv->gpio_base + desc->offset;
+}
+
static int gpio_post_probe(struct udevice *dev)
{
- struct gpio_dev_priv *uc_priv = dev->uclass_priv;
+ struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
uc_priv->name = calloc(uc_priv->gpio_count, sizeof(char *));
if (!uc_priv->name)
static int gpio_pre_remove(struct udevice *dev)
{
- struct gpio_dev_priv *uc_priv = dev->uclass_priv;
+ struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
int i;
for (i = 0; i < uc_priv->gpio_count; i++) {
return gpio_renumber(dev);
}
+int gpio_dev_request_index(struct udevice *dev, const char *nodename,
+ char *list_name, int index, int flags,
+ int dtflags, struct gpio_desc *desc)
+{
+ struct ofnode_phandle_args args;
+
+ args.node = ofnode_null();
+ args.args_count = 2;
+ args.args[0] = index;
+ args.args[1] = dtflags;
+
+ return gpio_request_tail(0, nodename, &args, list_name, index, desc,
+ flags, 0, dev);
+}
+
+static int gpio_post_bind(struct udevice *dev)
+{
+#if defined(CONFIG_DM_GPIO_HOG)
+ struct udevice *child;
+ ofnode node;
+#endif
+
+#if defined(CONFIG_NEEDS_MANUAL_RELOC)
+ struct dm_gpio_ops *ops = (struct dm_gpio_ops *)device_get_ops(dev);
+ static int reloc_done;
+
+ if (!reloc_done) {
+ if (ops->request)
+ ops->request += gd->reloc_off;
+ if (ops->free)
+ ops->free += gd->reloc_off;
+ if (ops->direction_input)
+ ops->direction_input += gd->reloc_off;
+ if (ops->direction_output)
+ ops->direction_output += gd->reloc_off;
+ if (ops->get_value)
+ ops->get_value += gd->reloc_off;
+ if (ops->set_value)
+ ops->set_value += gd->reloc_off;
+ if (ops->get_open_drain)
+ ops->get_open_drain += gd->reloc_off;
+ if (ops->set_open_drain)
+ ops->set_open_drain += gd->reloc_off;
+ if (ops->get_function)
+ ops->get_function += gd->reloc_off;
+ if (ops->xlate)
+ ops->xlate += gd->reloc_off;
+
+ reloc_done++;
+ }
+#endif
+
+#if defined(CONFIG_DM_GPIO_HOG)
+ dev_for_each_subnode(node, dev) {
+ if (ofnode_read_bool(node, "gpio-hog")) {
+ const char *name = ofnode_get_name(node);
+
+ device_bind_driver_to_node(dev, "gpio_hog", name,
+ node, &child);
+ }
+ }
+#endif
+ return 0;
+}
+
UCLASS_DRIVER(gpio) = {
.id = UCLASS_GPIO,
.name = "gpio",
+ .flags = DM_UC_FLAG_SEQ_ALIAS,
.post_probe = gpio_post_probe,
+ .post_bind = gpio_post_bind,
.pre_remove = gpio_pre_remove,
.per_device_auto_alloc_size = sizeof(struct gpio_dev_priv),
};
projects / J-u-boot.git / blobdiff