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Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/gpio-uclass.c204
-rw-r--r--drivers/gpio/mpc8xxx_gpio.c22
-rw-r--r--drivers/gpio/sandbox.c322
3 files changed, 415 insertions, 133 deletions
diff --git a/drivers/gpio/gpio-uclass.c b/drivers/gpio/gpio-uclass.c
index 0a22441d38a..757ab7106ee 100644
--- a/drivers/gpio/gpio-uclass.c
+++ b/drivers/gpio/gpio-uclass.c
@@ -5,6 +5,7 @@
#include <common.h>
#include <dm.h>
+#include <dm/device_compat.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <dm/uclass-internal.h>
@@ -19,6 +20,22 @@
DECLARE_GLOBAL_DATA_PTR;
/**
+ * gpio_desc_init() - Initialize the GPIO descriptor
+ *
+ * @desc: GPIO descriptor to initialize
+ * @dev: GPIO device
+ * @offset: Offset of device GPIO
+ */
+static void gpio_desc_init(struct gpio_desc *desc,
+ struct udevice *dev,
+ uint offset)
+{
+ desc->dev = dev;
+ desc->offset = offset;
+ desc->flags = 0;
+}
+
+/**
* gpio_to_device() - Convert global GPIO number to device, number
*
* Convert the GPIO number to an entry in the list of GPIOs
@@ -41,9 +58,7 @@ static int gpio_to_device(unsigned int gpio, struct gpio_desc *desc)
uc_priv = dev_get_uclass_priv(dev);
if (gpio >= uc_priv->gpio_base &&
gpio < uc_priv->gpio_base + uc_priv->gpio_count) {
- desc->dev = dev;
- desc->offset = gpio - uc_priv->gpio_base;
- desc->flags = 0;
+ gpio_desc_init(desc, dev, gpio - uc_priv->gpio_base);
return 0;
}
}
@@ -85,8 +100,7 @@ int dm_gpio_lookup_name(const char *name, struct gpio_desc *desc)
if (!dev)
return ret ? ret : -EINVAL;
- desc->dev = dev;
- desc->offset = offset;
+ gpio_desc_init(desc, dev, offset);
return 0;
}
@@ -127,8 +141,27 @@ int gpio_xlate_offs_flags(struct udevice *dev, struct gpio_desc *desc,
if (args->args_count < 2)
return 0;
+ desc->flags = 0;
if (args->args[1] & GPIO_ACTIVE_LOW)
- desc->flags = GPIOD_ACTIVE_LOW;
+ desc->flags |= GPIOD_ACTIVE_LOW;
+
+ /*
+ * need to test 2 bits for gpio output binding:
+ * OPEN_DRAIN (0x6) = SINGLE_ENDED (0x2) | LINE_OPEN_DRAIN (0x4)
+ * OPEN_SOURCE (0x2) = SINGLE_ENDED (0x2) | LINE_OPEN_SOURCE (0x0)
+ */
+ if (args->args[1] & GPIO_SINGLE_ENDED) {
+ if (args->args[1] & GPIO_LINE_OPEN_DRAIN)
+ desc->flags |= GPIOD_OPEN_DRAIN;
+ else
+ desc->flags |= GPIOD_OPEN_SOURCE;
+ }
+
+ if (args->args[1] & GPIO_PULL_UP)
+ desc->flags |= GPIOD_PULL_UP;
+
+ if (args->args[1] & GPIO_PULL_DOWN)
+ desc->flags |= GPIOD_PULL_DOWN;
return 0;
}
@@ -463,18 +496,24 @@ int gpio_direction_output(unsigned gpio, int value)
desc.offset, value);
}
-int dm_gpio_get_value(const struct gpio_desc *desc)
+static int _gpio_get_value(const struct gpio_desc *desc)
{
int value;
+
+ value = gpio_get_ops(desc->dev)->get_value(desc->dev, desc->offset);
+
+ return desc->flags & GPIOD_ACTIVE_LOW ? !value : value;
+}
+
+int dm_gpio_get_value(const struct gpio_desc *desc)
+{
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;
+ return _gpio_get_value(desc);
}
int dm_gpio_set_value(const struct gpio_desc *desc, int value)
@@ -491,71 +530,128 @@ int dm_gpio_set_value(const struct gpio_desc *desc, int value)
return 0;
}
-int dm_gpio_get_open_drain(struct gpio_desc *desc)
+/* check dir flags invalid configuration */
+static int check_dir_flags(ulong flags)
{
- struct dm_gpio_ops *ops = gpio_get_ops(desc->dev);
- int ret;
+ if ((flags & GPIOD_IS_OUT) && (flags & GPIOD_IS_IN)) {
+ log_debug("%s: flags 0x%lx has GPIOD_IS_OUT and GPIOD_IS_IN\n",
+ __func__, flags);
+ return -EINVAL;
+ }
+
+ if ((flags & GPIOD_PULL_UP) && (flags & GPIOD_PULL_DOWN)) {
+ log_debug("%s: flags 0x%lx has GPIOD_PULL_UP and GPIOD_PULL_DOWN\n",
+ __func__, flags);
+ return -EINVAL;
+ }
+
+ if ((flags & GPIOD_OPEN_DRAIN) && (flags & GPIOD_OPEN_SOURCE)) {
+ log_debug("%s: flags 0x%lx has GPIOD_OPEN_DRAIN and GPIOD_OPEN_SOURCE\n",
+ __func__, flags);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static 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);
+ struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+ int ret = 0;
+
+ ret = check_dir_flags(flags);
+ if (ret) {
+ dev_dbg(dev,
+ "%s error: set_dir_flags for gpio %s%d has invalid dir flags 0x%lx\n",
+ desc->dev->name,
+ uc_priv->bank_name ? uc_priv->bank_name : "",
+ desc->offset, flags);
- 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;
+ /* GPIOD_ are directly managed by driver in set_dir_flags*/
+ if (ops->set_dir_flags) {
+ ret = ops->set_dir_flags(dev, desc->offset, flags);
+ } else {
+ if (flags & GPIOD_IS_OUT) {
+ ret = ops->direction_output(dev, desc->offset,
+ GPIOD_FLAGS_OUTPUT(flags));
+ } else if (flags & GPIOD_IS_IN) {
+ ret = ops->direction_input(dev, desc->offset);
+ }
+ }
+
+ return ret;
}
-int dm_gpio_set_open_drain(struct gpio_desc *desc, int value)
+int dm_gpio_set_dir_flags(struct gpio_desc *desc, ulong flags)
{
- struct dm_gpio_ops *ops = gpio_get_ops(desc->dev);
int ret;
- ret = check_reserved(desc, "set_open_drain");
+ ret = check_reserved(desc, "set_dir_flags");
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 */
+ /* combine the requested flags (for IN/OUT) and the descriptor flags */
+ flags |= desc->flags;
+ ret = _dm_gpio_set_dir_flags(desc, flags);
+
+ /* update the descriptor flags */
+ if (ret)
+ desc->flags = flags;
return ret;
}
-int dm_gpio_set_dir_flags(struct gpio_desc *desc, ulong flags)
+int dm_gpio_set_dir(struct gpio_desc *desc)
{
- 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;
+ return _dm_gpio_set_dir_flags(desc, desc->flags);
+}
- 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);
- }
+int dm_gpio_get_dir_flags(struct gpio_desc *desc, ulong *flags)
+{
+ struct udevice *dev = desc->dev;
+ int ret, value;
+ struct dm_gpio_ops *ops = gpio_get_ops(dev);
+ ulong dir_flags;
+
+ ret = check_reserved(desc, "get_dir_flags");
if (ret)
return ret;
- /*
- * Update desc->flags here, so that GPIO_ACTIVE_LOW is honoured in
- * futures
- */
- desc->flags = flags;
- return 0;
-}
+ /* GPIOD_ are directly provided by driver except GPIOD_ACTIVE_LOW */
+ if (ops->get_dir_flags) {
+ ret = ops->get_dir_flags(dev, desc->offset, &dir_flags);
+ if (ret)
+ return ret;
-int dm_gpio_set_dir(struct gpio_desc *desc)
-{
- return dm_gpio_set_dir_flags(desc, desc->flags);
+ /* GPIOD_ACTIVE_LOW is saved in desc->flags */
+ value = dir_flags & GPIOD_IS_OUT_ACTIVE ? 1 : 0;
+ if (desc->flags & GPIOD_ACTIVE_LOW)
+ value = !value;
+ dir_flags &= ~(GPIOD_ACTIVE_LOW | GPIOD_IS_OUT_ACTIVE);
+ dir_flags |= (desc->flags & GPIOD_ACTIVE_LOW);
+ if (value)
+ dir_flags |= GPIOD_IS_OUT_ACTIVE;
+ } else {
+ dir_flags = desc->flags;
+ /* only GPIOD_IS_OUT_ACTIVE is provided by uclass */
+ dir_flags &= ~GPIOD_IS_OUT_ACTIVE;
+ if ((desc->flags & GPIOD_IS_OUT) && _gpio_get_value(desc))
+ dir_flags |= GPIOD_IS_OUT_ACTIVE;
+ }
+ *flags = dir_flags;
+
+ return 0;
}
/**
@@ -804,9 +900,7 @@ static int gpio_request_tail(int ret, const char *nodename,
struct gpio_desc *desc, int flags,
bool add_index, struct udevice *gpio_dev)
{
- desc->dev = gpio_dev;
- desc->offset = 0;
- desc->flags = 0;
+ gpio_desc_init(desc, gpio_dev, 0);
if (ret)
goto err;
@@ -830,7 +924,7 @@ static int gpio_request_tail(int ret, const char *nodename,
debug("%s: dm_gpio_requestf failed\n", __func__);
goto err;
}
- ret = dm_gpio_set_dir_flags(desc, flags | desc->flags);
+ ret = dm_gpio_set_dir_flags(desc, flags);
if (ret) {
debug("%s: dm_gpio_set_dir failed\n", __func__);
goto err;
@@ -1053,14 +1147,14 @@ static int gpio_post_bind(struct udevice *dev)
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;
+ if (ops->set_dir_flags)
+ ops->set_dir_flags += gd->reloc_off;
+ if (ops->get_dir_flags)
+ ops->get_dir_flags += gd->reloc_off;
reloc_done++;
}
diff --git a/drivers/gpio/mpc8xxx_gpio.c b/drivers/gpio/mpc8xxx_gpio.c
index 4b385b8b395..1dfd22522c7 100644
--- a/drivers/gpio/mpc8xxx_gpio.c
+++ b/drivers/gpio/mpc8xxx_gpio.c
@@ -133,26 +133,6 @@ static int mpc8xxx_gpio_get_value(struct udevice *dev, uint gpio)
return !!mpc8xxx_gpio_get_val(data->base, gpio_mask(gpio));
}
-static int mpc8xxx_gpio_get_open_drain(struct udevice *dev, uint gpio)
-{
- struct mpc8xxx_gpio_data *data = dev_get_priv(dev);
-
- return !!mpc8xxx_gpio_open_drain_val(data->base, gpio_mask(gpio));
-}
-
-static int mpc8xxx_gpio_set_open_drain(struct udevice *dev, uint gpio,
- int value)
-{
- struct mpc8xxx_gpio_data *data = dev_get_priv(dev);
-
- if (value)
- mpc8xxx_gpio_open_drain_on(data->base, gpio_mask(gpio));
- else
- mpc8xxx_gpio_open_drain_off(data->base, gpio_mask(gpio));
-
- return 0;
-}
-
static int mpc8xxx_gpio_get_function(struct udevice *dev, uint gpio)
{
struct mpc8xxx_gpio_data *data = dev_get_priv(dev);
@@ -229,8 +209,6 @@ static const struct dm_gpio_ops gpio_mpc8xxx_ops = {
.direction_output = mpc8xxx_gpio_direction_output,
.get_value = mpc8xxx_gpio_get_value,
.set_value = mpc8xxx_gpio_set_value,
- .get_open_drain = mpc8xxx_gpio_get_open_drain,
- .set_open_drain = mpc8xxx_gpio_set_open_drain,
.get_function = mpc8xxx_gpio_get_function,
};
diff --git a/drivers/gpio/sandbox.c b/drivers/gpio/sandbox.c
index 2ef5c67ad59..9549c74c2be 100644
--- a/drivers/gpio/sandbox.c
+++ b/drivers/gpio/sandbox.c
@@ -8,43 +8,44 @@
#include <fdtdec.h>
#include <malloc.h>
#include <asm/gpio.h>
+#include <dm/device_compat.h>
+#include <dm/lists.h>
#include <dm/of.h>
+#include <dm/pinctrl.h>
#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/gpio/sandbox-gpio.h>
-/* Flags for each GPIO */
-#define GPIOF_OUTPUT (1 << 0) /* Currently set as an output */
-#define GPIOF_HIGH (1 << 1) /* Currently set high */
-#define GPIOF_ODR (1 << 2) /* Currently set to open drain mode */
struct gpio_state {
const char *label; /* label given by requester */
- u8 flags; /* flags (GPIOF_...) */
+ ulong dir_flags; /* dir_flags (GPIOD_...) */
};
-/* Access routines for GPIO state */
-static u8 *get_gpio_flags(struct udevice *dev, unsigned offset)
+/* Access routines for GPIO dir flags */
+static ulong *get_gpio_dir_flags(struct udevice *dev, unsigned int offset)
{
struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
struct gpio_state *state = dev_get_priv(dev);
if (offset >= uc_priv->gpio_count) {
- static u8 invalid_flags;
+ static ulong invalid_dir_flags;
printf("sandbox_gpio: error: invalid gpio %u\n", offset);
- return &invalid_flags;
+ return &invalid_dir_flags;
}
- return &state[offset].flags;
+ return &state[offset].dir_flags;
+
}
-static int get_gpio_flag(struct udevice *dev, unsigned offset, int flag)
+static int get_gpio_flag(struct udevice *dev, unsigned int offset, ulong flag)
{
- return (*get_gpio_flags(dev, offset) & flag) != 0;
+ return (*get_gpio_dir_flags(dev, offset) & flag) != 0;
}
-static int set_gpio_flag(struct udevice *dev, unsigned offset, int flag,
+static int set_gpio_flag(struct udevice *dev, unsigned int offset, ulong flag,
int value)
{
- u8 *gpio = get_gpio_flags(dev, offset);
+ ulong *gpio = get_gpio_dir_flags(dev, offset);
if (value)
*gpio |= flag;
@@ -60,34 +61,40 @@ static int set_gpio_flag(struct udevice *dev, unsigned offset, int flag,
int sandbox_gpio_get_value(struct udevice *dev, unsigned offset)
{
- if (get_gpio_flag(dev, offset, GPIOF_OUTPUT))
+ if (get_gpio_flag(dev, offset, GPIOD_IS_OUT))
debug("sandbox_gpio: get_value on output gpio %u\n", offset);
- return get_gpio_flag(dev, offset, GPIOF_HIGH);
+ return get_gpio_flag(dev, offset, GPIOD_IS_OUT_ACTIVE);
}
int sandbox_gpio_set_value(struct udevice *dev, unsigned offset, int value)
{
- return set_gpio_flag(dev, offset, GPIOF_HIGH, value);
+ return set_gpio_flag(dev, offset, GPIOD_IS_OUT_ACTIVE, value);
}
-int sandbox_gpio_get_open_drain(struct udevice *dev, unsigned offset)
+int sandbox_gpio_get_direction(struct udevice *dev, unsigned offset)
{
- return get_gpio_flag(dev, offset, GPIOF_ODR);
+ return get_gpio_flag(dev, offset, GPIOD_IS_OUT);
}
-int sandbox_gpio_set_open_drain(struct udevice *dev, unsigned offset, int value)
+int sandbox_gpio_set_direction(struct udevice *dev, unsigned offset, int output)
{
- return set_gpio_flag(dev, offset, GPIOF_ODR, value);
+ set_gpio_flag(dev, offset, GPIOD_IS_OUT, output);
+ set_gpio_flag(dev, offset, GPIOD_IS_IN, !(output));
+
+ return 0;
}
-int sandbox_gpio_get_direction(struct udevice *dev, unsigned offset)
+ulong sandbox_gpio_get_dir_flags(struct udevice *dev, unsigned int offset)
{
- return get_gpio_flag(dev, offset, GPIOF_OUTPUT);
+ return *get_gpio_dir_flags(dev, offset);
}
-int sandbox_gpio_set_direction(struct udevice *dev, unsigned offset, int output)
+int sandbox_gpio_set_dir_flags(struct udevice *dev, unsigned int offset,
+ ulong flags)
{
- return set_gpio_flag(dev, offset, GPIOF_OUTPUT, output);
+ *get_gpio_dir_flags(dev, offset) = flags;
+
+ return 0;
}
/*
@@ -134,33 +141,14 @@ static int sb_gpio_set_value(struct udevice *dev, unsigned offset, int value)
return sandbox_gpio_set_value(dev, offset, value);
}
-/* read GPIO ODR value of port 'offset' */
-static int sb_gpio_get_open_drain(struct udevice *dev, unsigned offset)
-{
- debug("%s: offset:%u\n", __func__, offset);
-
- return sandbox_gpio_get_open_drain(dev, offset);
-}
-
-/* write GPIO ODR value to port 'offset' */
-static int sb_gpio_set_open_drain(struct udevice *dev, unsigned offset, int value)
-{
- debug("%s: offset:%u, value = %d\n", __func__, offset, value);
-
- if (!sandbox_gpio_get_direction(dev, offset)) {
- printf("sandbox_gpio: error: set_open_drain on input gpio %u\n",
- offset);
- return -1;
- }
-
- return sandbox_gpio_set_open_drain(dev, offset, value);
-}
-
static int sb_gpio_get_function(struct udevice *dev, unsigned offset)
{
- if (get_gpio_flag(dev, offset, GPIOF_OUTPUT))
+ if (get_gpio_flag(dev, offset, GPIOD_IS_OUT))
return GPIOF_OUTPUT;
- return GPIOF_INPUT;
+ if (get_gpio_flag(dev, offset, GPIOD_IS_IN))
+ return GPIOF_INPUT;
+
+ return GPIOF_INPUT; /*GPIO is not configurated */
}
static int sb_gpio_xlate(struct udevice *dev, struct gpio_desc *desc,
@@ -169,27 +157,54 @@ static int sb_gpio_xlate(struct udevice *dev, struct gpio_desc *desc,
desc->offset = args->args[0];
if (args->args_count < 2)
return 0;
- if (args->args[1] & GPIO_ACTIVE_LOW)
- desc->flags |= GPIOD_ACTIVE_LOW;
- if (args->args[1] & 2)
+ /* treat generic binding with gpio uclass */
+ gpio_xlate_offs_flags(dev, desc, args);
+
+ /* sandbox test specific, not defined in gpio.h */
+ if (args->args[1] & GPIO_IN)
desc->flags |= GPIOD_IS_IN;
- if (args->args[1] & 4)
+
+ if (args->args[1] & GPIO_OUT)
desc->flags |= GPIOD_IS_OUT;
- if (args->args[1] & 8)
+
+ if (args->args[1] & GPIO_OUT_ACTIVE)
desc->flags |= GPIOD_IS_OUT_ACTIVE;
return 0;
}
+static int sb_gpio_set_dir_flags(struct udevice *dev, unsigned int offset,
+ ulong flags)
+{
+ ulong *dir_flags;
+
+ debug("%s: offset:%u, dir_flags = %lx\n", __func__, offset, flags);
+
+ dir_flags = get_gpio_dir_flags(dev, offset);
+
+ *dir_flags = flags;
+
+ return 0;
+}
+
+static int sb_gpio_get_dir_flags(struct udevice *dev, unsigned int offset,
+ ulong *flags)
+{
+ debug("%s: offset:%u\n", __func__, offset);
+ *flags = *get_gpio_dir_flags(dev, offset);
+
+ return 0;
+}
+
static const struct dm_gpio_ops gpio_sandbox_ops = {
.direction_input = sb_gpio_direction_input,
.direction_output = sb_gpio_direction_output,
.get_value = sb_gpio_get_value,
.set_value = sb_gpio_set_value,
- .get_open_drain = sb_gpio_get_open_drain,
- .set_open_drain = sb_gpio_set_open_drain,
.get_function = sb_gpio_get_function,
.xlate = sb_gpio_xlate,
+ .set_dir_flags = sb_gpio_set_dir_flags,
+ .get_dir_flags = sb_gpio_get_dir_flags,
};
static int sandbox_gpio_ofdata_to_platdata(struct udevice *dev)
@@ -237,3 +252,198 @@ U_BOOT_DRIVER(gpio_sandbox) = {
.remove = gpio_sandbox_remove,
.ops = &gpio_sandbox_ops,
};
+
+/* pincontrol: used only to check GPIO pin configuration (pinmux command) */
+
+struct sb_pinctrl_priv {
+ int pinctrl_ngpios;
+ struct list_head gpio_dev;
+};
+
+struct sb_gpio_bank {
+ struct udevice *gpio_dev;
+ struct list_head list;
+};
+
+static int sb_populate_gpio_dev_list(struct udevice *dev)
+{
+ struct sb_pinctrl_priv *priv = dev_get_priv(dev);
+ struct udevice *gpio_dev;
+ struct udevice *child;
+ struct sb_gpio_bank *gpio_bank;
+ int ret;
+
+ /*
+ * parse pin-controller sub-nodes (ie gpio bank nodes) and fill
+ * a list with all gpio device reference which belongs to the
+ * current pin-controller. This list is used to find pin_name and
+ * pin muxing
+ */
+ list_for_each_entry(child, &dev->child_head, sibling_node) {
+ ret = uclass_get_device_by_name(UCLASS_GPIO, child->name,
+ &gpio_dev);
+ if (ret < 0)
+ continue;
+
+ gpio_bank = malloc(sizeof(*gpio_bank));
+ if (!gpio_bank) {
+ dev_err(dev, "Not enough memory\n");
+ return -ENOMEM;
+ }
+
+ gpio_bank->gpio_dev = gpio_dev;
+ list_add_tail(&gpio_bank->list, &priv->gpio_dev);
+ }
+
+ return 0;
+}
+
+static int sb_pinctrl_get_pins_count(struct udevice *dev)
+{
+ struct sb_pinctrl_priv *priv = dev_get_priv(dev);
+ struct gpio_dev_priv *uc_priv;
+ struct sb_gpio_bank *gpio_bank;
+
+ /*
+ * if get_pins_count has already been executed once on this
+ * pin-controller, no need to run it again
+ */
+ if (priv->pinctrl_ngpios)
+ return priv->pinctrl_ngpios;
+
+ if (list_empty(&priv->gpio_dev))
+ sb_populate_gpio_dev_list(dev);
+ /*
+ * walk through all banks to retrieve the pin-controller
+ * pins number
+ */
+ list_for_each_entry(gpio_bank, &priv->gpio_dev, list) {
+ uc_priv = dev_get_uclass_priv(gpio_bank->gpio_dev);
+
+ priv->pinctrl_ngpios += uc_priv->gpio_count;
+ }
+
+ return priv->pinctrl_ngpios;
+}
+
+static struct udevice *sb_pinctrl_get_gpio_dev(struct udevice *dev,
+ unsigned int selector,
+ unsigned int *idx)
+{
+ struct sb_pinctrl_priv *priv = dev_get_priv(dev);
+ struct sb_gpio_bank *gpio_bank;
+ struct gpio_dev_priv *uc_priv;
+ int pin_count = 0;
+
+ if (list_empty(&priv->gpio_dev))
+ sb_populate_gpio_dev_list(dev);
+
+ /* look up for the bank which owns the requested pin */
+ list_for_each_entry(gpio_bank, &priv->gpio_dev, list) {
+ uc_priv = dev_get_uclass_priv(gpio_bank->gpio_dev);
+
+ if (selector < (pin_count + uc_priv->gpio_count)) {
+ /*
+ * we found the bank, convert pin selector to
+ * gpio bank index
+ */
+ *idx = selector - pin_count;
+
+ return gpio_bank->gpio_dev;
+ }
+ pin_count += uc_priv->gpio_count;
+ }
+
+ return NULL;
+}
+
+static const char *sb_pinctrl_get_pin_name(struct udevice *dev,
+ unsigned int selector)
+{
+ struct gpio_dev_priv *uc_priv;
+ struct udevice *gpio_dev;
+ unsigned int gpio_idx;
+ static char pin_name[PINNAME_SIZE];
+
+ /* look up for the bank which owns the requested pin */
+ gpio_dev = sb_pinctrl_get_gpio_dev(dev, selector, &gpio_idx);
+ if (!gpio_dev) {
+ snprintf(pin_name, PINNAME_SIZE, "Error");
+ } else {
+ uc_priv = dev_get_uclass_priv(gpio_dev);
+
+ snprintf(pin_name, PINNAME_SIZE, "%s%d",
+ uc_priv->bank_name,
+ gpio_idx);
+ }
+
+ return pin_name;
+}
+
+static char *get_dir_flags_string(ulong flags)
+{
+ if (flags & GPIOD_OPEN_DRAIN)
+ return "drive-open-drain";
+ if (flags & GPIOD_OPEN_SOURCE)
+ return "drive-open-source";
+ if (flags & GPIOD_PULL_UP)
+ return "bias-pull-up";
+ if (flags & GPIOD_PULL_DOWN)
+ return "bias-pull-down";
+ return ".";
+}
+
+static int sb_pinctrl_get_pin_muxing(struct udevice *dev,
+ unsigned int selector,
+ char *buf, int size)
+{
+ struct udevice *gpio_dev;
+ unsigned int gpio_idx;
+ ulong dir_flags;
+ int function;
+
+ /* look up for the bank which owns the requested pin */
+ gpio_dev = sb_pinctrl_get_gpio_dev(dev, selector, &gpio_idx);
+ if (!gpio_dev) {
+ snprintf(buf, size, "Error");
+ } else {
+ function = sb_gpio_get_function(gpio_dev, gpio_idx);
+ dir_flags = *get_gpio_dir_flags(gpio_dev, gpio_idx);
+
+ snprintf(buf, size, "gpio %s %s",
+ function == GPIOF_OUTPUT ? "output" : "input",
+ get_dir_flags_string(dir_flags));
+ }
+
+ return 0;
+}
+
+static int sandbox_pinctrl_probe(struct udevice *dev)
+{
+ struct sb_pinctrl_priv *priv = dev_get_priv(dev);
+
+ INIT_LIST_HEAD(&priv->gpio_dev);
+
+ return 0;
+}
+
+static struct pinctrl_ops sandbox_pinctrl_gpio_ops = {
+ .get_pin_name = sb_pinctrl_get_pin_name,
+ .get_pins_count = sb_pinctrl_get_pins_count,
+ .get_pin_muxing = sb_pinctrl_get_pin_muxing,
+};
+
+static const struct udevice_id sandbox_pinctrl_gpio_match[] = {
+ { .compatible = "sandbox,pinctrl-gpio" },
+ { /* sentinel */ }
+};
+
+U_BOOT_DRIVER(sandbox_pinctrl_gpio) = {
+ .name = "sandbox_pinctrl_gpio",
+ .id = UCLASS_PINCTRL,
+ .of_match = sandbox_pinctrl_gpio_match,
+ .ops = &sandbox_pinctrl_gpio_ops,
+ .bind = dm_scan_fdt_dev,
+ .probe = sandbox_pinctrl_probe,
+ .priv_auto_alloc_size = sizeof(struct sb_pinctrl_priv),
+};
generated by cgit v1.2.3 (git 2.0.4) at 2025-09-25 02:05:27 +0000