Export all symbols and create header file for the GPIO forwarder library.
It will be used in the next changes.
Signed-off-by: Thomas Richard <thomas.rich...@bootlin.com>
---
drivers/gpio/gpio-aggregator.c | 201 +++++++++++++++++++++++++++++++++++++++--
include/linux/gpio/forwarder.h | 37 ++++++++
2 files changed, 232 insertions(+), 6 deletions(-)
diff --git a/drivers/gpio/gpio-aggregator.c b/drivers/gpio/gpio-aggregator.c
index f1f48ceed75f..ea2a6d15cd14 100644
--- a/drivers/gpio/gpio-aggregator.c
+++ b/drivers/gpio/gpio-aggregator.c
@@ -28,6 +28,7 @@
#include <linux/gpio/consumer.h>
#include <linux/gpio/driver.h>
+#include <linux/gpio/forwarder.h>
#include <linux/gpio/machine.h>
#include "dev-sync-probe.h"
@@ -475,8 +476,180 @@ static int gpiochip_fwd_setup_delay_line(struct
gpiochip_fwd *fwd)
}
#endif /* !CONFIG_OF_GPIO */
-static struct gpiochip_fwd *
-devm_gpiochip_fwd_alloc(struct device *dev, unsigned int ngpios)
+/**
+ * gpiochip_fwd_get_gpiochip - Get the GPIO chip for the GPIO forwarder
+ * @fwd: GPIO forwarder
+ *
+ * Returns: The GPIO chip for the GPIO forwarder
+ */
+struct gpio_chip *gpiochip_fwd_get_gpiochip(struct gpiochip_fwd *fwd)
+{
+ return &fwd->chip;
+}
+EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_get_gpiochip, "GPIO_FORWARDER");
+
+/**
+ * gpiochip_fwd_gpio_get_direction - Return the current direction of a GPIO
forwarder line
+ * @fwd: GPIO forwarder
+ * @offset: the offset of the line
+ *
+ * Returns: 0 for output, 1 for input, or an error code in case of error.
+ */
+int gpiochip_fwd_gpio_get_direction(struct gpiochip_fwd *fwd, unsigned int
offset)
+{
+ struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);
+
+ return gpio_fwd_get_direction(gc, offset);
+}
+EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_get_direction, "GPIO_FORWARDER");
+
+/**
+ * gpiochip_fwd_gpio_direction_output - Set a GPIO forwarder line direction to
+ * output
+ * @fwd: GPIO forwarder
+ * @offset: the offset of the line
+ * @value: value to set
+ *
+ * Returns: 0 on success, or negative errno on failure.
+ */
+int gpiochip_fwd_gpio_direction_output(struct gpiochip_fwd *fwd, unsigned int
offset,
+ int value)
+{
+ struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);
+
+ return gpio_fwd_direction_output(gc, offset, value);
+}
+EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_direction_output, "GPIO_FORWARDER");
+
+/**
+ * gpiochip_fwd_gpio_direction_input - Set a GPIO forwarder line direction to
input
+ * @fwd: GPIO forwarder
+ * @offset: the offset of the line
+ *
+ * Returns: 0 on success, or negative errno on failure.
+ */
+int gpiochip_fwd_gpio_direction_input(struct gpiochip_fwd *fwd, unsigned int
offset)
+{
+ struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);
+
+ return gpio_fwd_direction_input(gc, offset);
+}
+EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_direction_input, "GPIO_FORWARDER");
+
+/**
+ * gpiochip_fwd_gpio_get - Return a GPIO forwarder line's value
+ * @fwd: GPIO forwarder
+ * @offset: the offset of the line
+ *
+ * Returns: The GPIO's logical value, i.e. taking the ACTIVE_LOW status into
+ * account, or negative errno on failure.
+ */
+int gpiochip_fwd_gpio_get(struct gpiochip_fwd *fwd, unsigned int offset)
+{
+ struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);
+
+ return gpio_fwd_get(gc, offset);
+}
+EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_get, "GPIO_FORWARDER");
+
+/**
+ * gpiochip_fwd_gpio_get_multiple - Get values for multiple GPIO forwarder
lines
+ * @fwd: GPIO forwarder
+ * @mask: bit mask array; one bit per line; BITS_PER_LONG bits per word defines
+ * which lines are to be read
+ * @bits: bit value array; one bit per line; BITS_PER_LONG bits per word will
+ * contains the read values for the lines specified by mask
+ *
+ * Returns: 0 on success, or negative errno on failure.
+ */
+int gpiochip_fwd_gpio_get_multiple(struct gpiochip_fwd *fwd, unsigned long
*mask,
+ unsigned long *bits)
+{
+ struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);
+
+ return gpio_fwd_get_multiple_locked(gc, mask, bits);
+}
+EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_get_multiple, "GPIO_FORWARDER");
+
+/**
+ * gpiochip_fwd_gpio_set - Assign value to a GPIO forwarder line.
+ * @fwd: GPIO forwarder
+ * @offset: the offset of the line
+ * @value: value to set
+ *
+ * Returns: 0 on success, or negative errno on failure.
+ */
+int gpiochip_fwd_gpio_set(struct gpiochip_fwd *fwd, unsigned int offset, int
value)
+{
+ struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);
+
+ return gpio_fwd_set(gc, offset, value);
+}
+EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_set, "GPIO_FORWARDER");
+
+/**
+ * gpiochip_fwd_gpio_set_multiple - Assign values to multiple GPIO forwarder
lines
+ * @fwd: GPIO forwarder
+ * @mask: bit mask array; one bit per output; BITS_PER_LONG bits per word
+ * defines which outputs are to be changed
+ * @bits: bit value array; one bit per output; BITS_PER_LONG bits per word
+ * defines the values the outputs specified by mask are to be set to
+ *
+ * Returns: 0 on success, or negative errno on failure.
+ */
+int gpiochip_fwd_gpio_set_multiple(struct gpiochip_fwd *fwd, unsigned long
*mask,
+ unsigned long *bits)
+{
+ struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);
+
+ return gpio_fwd_set_multiple_locked(gc, mask, bits);
+}
+EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_set_multiple, "GPIO_FORWARDER");
+
+/**
+ * gpiochip_fwd_gpio_set_config - Set @config for a GPIO forwarder line
+ * @fwd: GPIO forwarder
+ * @offset: the offset of the line
+ * @config: Same packed config format as generic pinconf
+ *
+ * Returns: 0 on success, %-ENOTSUPP if the controller doesn't support setting
+ * the configuration.
+ */
+int gpiochip_fwd_gpio_set_config(struct gpiochip_fwd *fwd, unsigned int offset,
+ unsigned long config)
+{
+ struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);
+
+ return gpio_fwd_set_config(gc, offset, config);
+}
+EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_set_config, "GPIO_FORWARDER");
+
+/**
+ * gpiochip_fwd_gpio_to_irq - Return the IRQ corresponding to a GPIO forwarder
line
+ * @fwd: GPIO forwarder
+ * @offset: the offset of the line
+ *
+ * Returns: The Linux IRQ corresponding to the passed line, or an error code in
+ * case of error.
+ */
+int gpiochip_fwd_gpio_to_irq(struct gpiochip_fwd *fwd, unsigned int offset)
+{
+ struct gpio_chip *gc = gpiochip_fwd_get_gpiochip(fwd);
+
+ return gpio_fwd_to_irq(gc, offset);
+}
+EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_gpio_to_irq, "GPIO_FORWARDER");
+
+/**
+ * devm_gpiochip_fwd_alloc - Allocate and initialize a new GPIO forwarder
+ * @dev: Parent device pointer
+ * @ngpios: Number of GPIOs in the forwarder
+ *
+ * Returns: An opaque object pointer, or an ERR_PTR()-encoded negative error
+ * code on failure.
+ */
+struct gpiochip_fwd *devm_gpiochip_fwd_alloc(struct device *dev,
+ unsigned int ngpios)
{
struct gpiochip_fwd *fwd;
struct gpio_chip *chip;
@@ -507,10 +680,18 @@ devm_gpiochip_fwd_alloc(struct device *dev, unsigned int
ngpios)
return fwd;
}
+EXPORT_SYMBOL_NS_GPL(devm_gpiochip_fwd_alloc, "GPIO_FORWARDER");
-static int gpiochip_fwd_desc_add(struct gpiochip_fwd *fwd,
- struct gpio_desc *desc,
- unsigned int offset)
+/**
+ * gpiochip_fwd_desc_add - Add a GPIO desc in the forwarder
+ * @fwd: GPIO forwarder
+ * @desc: GPIO descriptor to register
+ * @offset: offset for the GPIO in the forwarder
+ *
+ * Returns: 0 on success, or negative errno on failure.
+ */
+int gpiochip_fwd_desc_add(struct gpiochip_fwd *fwd, struct gpio_desc *desc,
+ unsigned int offset)
{
struct gpio_chip *parent = gpiod_to_chip(desc);
struct gpio_chip *chip = &fwd->chip;
@@ -537,8 +718,15 @@ static int gpiochip_fwd_desc_add(struct gpiochip_fwd *fwd,
return 0;
}
+EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_desc_add, "GPIO_FORWARDER");
-static int gpiochip_fwd_register(struct gpiochip_fwd *fwd)
+/**
+ * gpiochip_fwd_register - Register a GPIO forwarder
+ * @fwd: GPIO forwarder
+ *
+ * Returns: 0 on success, or negative errno on failure.
+ */
+int gpiochip_fwd_register(struct gpiochip_fwd *fwd)
{
struct gpio_chip *chip = &fwd->chip;
@@ -549,6 +737,7 @@ static int gpiochip_fwd_register(struct gpiochip_fwd *fwd)
return devm_gpiochip_add_data(chip->parent, chip, fwd);
}
+EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_register, "GPIO_FORWARDER");
/**
* gpiochip_fwd_create() - Create a new GPIO forwarder
diff --git a/include/linux/gpio/forwarder.h b/include/linux/gpio/forwarder.h
new file mode 100644
index 000000000000..e21a1b7b1905
--- /dev/null
+++ b/include/linux/gpio/forwarder.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_GPIO_FORWARDER_H
+#define __LINUX_GPIO_FORWARDER_H
+
+struct gpio_desc;
+struct gpio_chip;
+struct gpiochip_fwd;
+
+struct gpiochip_fwd *devm_gpiochip_fwd_alloc(struct device *dev,
+ unsigned int ngpios);
+int gpiochip_fwd_desc_add(struct gpiochip_fwd *fwd,
+ struct gpio_desc *desc, unsigned int offset);
+int gpiochip_fwd_register(struct gpiochip_fwd *fwd);
+
+struct gpio_chip *gpiochip_fwd_get_gpiochip(struct gpiochip_fwd *fwd);
+
+int gpiochip_fwd_gpio_get_direction(struct gpiochip_fwd *fwd,
+ unsigned int offset);
+int gpiochip_fwd_gpio_direction_input(struct gpiochip_fwd *fwd,
+ unsigned int offset);
+int gpiochip_fwd_gpio_direction_output(struct gpiochip_fwd *fwd,
+ unsigned int offset,
+ int value);
+int gpiochip_fwd_gpio_get(struct gpiochip_fwd *fwd, unsigned int offset);
+int gpiochip_fwd_gpio_get_multiple(struct gpiochip_fwd *fwd,
+ unsigned long *mask,
+ unsigned long *bits);
+int gpiochip_fwd_gpio_set(struct gpiochip_fwd *fwd, unsigned int offset,
+ int value);
+int gpiochip_fwd_gpio_set_multiple(struct gpiochip_fwd *fwd,
+ unsigned long *mask,
+ unsigned long *bits);
+int gpiochip_fwd_gpio_set_config(struct gpiochip_fwd *fwd, unsigned int offset,
+ unsigned long config);
+int gpiochip_fwd_gpio_to_irq(struct gpiochip_fwd *fwd, unsigned int offset);
+
+#endif
--
2.39.5
