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Diffstat (limited to 'drivers/pinctrl/core.c')
-rw-r--r--drivers/pinctrl/core.c139
1 files changed, 74 insertions, 65 deletions
diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index 184ec92241..f2977eb655 100644
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -12,17 +12,19 @@
*/
#define pr_fmt(fmt) "pinctrl core: " fmt
+#include <linux/array_size.h>
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/export.h>
#include <linux/init.h>
-#include <linux/kernel.h>
#include <linux/kref.h>
#include <linux/list.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
+#include <linux/gpio/driver.h>
+
#include <linux/pinctrl/consumer.h>
#include <linux/pinctrl/devinfo.h>
#include <linux/pinctrl/machine.h>
@@ -267,7 +269,8 @@ static int pinctrl_register_pins(struct pinctrl_dev *pctldev,
/**
* gpio_to_pin() - GPIO range GPIO number to pin number translation
* @range: GPIO range used for the translation
- * @gpio: gpio pin to translate to a pin number
+ * @gc: GPIO chip structure from the GPIO subsystem
+ * @offset: hardware offset of the GPIO relative to the controller
*
* Finds the pin number for a given GPIO using the specified GPIO range
* as a base for translation. The distinction between linear GPIO ranges
@@ -278,25 +281,27 @@ static int pinctrl_register_pins(struct pinctrl_dev *pctldev,
* result of successful pinctrl_get_device_gpio_range calls)!
*/
static inline int gpio_to_pin(struct pinctrl_gpio_range *range,
- unsigned int gpio)
+ struct gpio_chip *gc, unsigned int offset)
{
- unsigned int offset = gpio - range->base;
+ unsigned int pin = gc->base + offset - range->base;
if (range->pins)
- return range->pins[offset];
+ return range->pins[pin];
else
- return range->pin_base + offset;
+ return range->pin_base + pin;
}
/**
* pinctrl_match_gpio_range() - check if a certain GPIO pin is in range
* @pctldev: pin controller device to check
- * @gpio: gpio pin to check taken from the global GPIO pin space
+ * @gc: GPIO chip structure from the GPIO subsystem
+ * @offset: hardware offset of the GPIO relative to the controller
*
* Tries to match a GPIO pin number to the ranges handled by a certain pin
* controller, return the range or NULL
*/
static struct pinctrl_gpio_range *
-pinctrl_match_gpio_range(struct pinctrl_dev *pctldev, unsigned gpio)
+pinctrl_match_gpio_range(struct pinctrl_dev *pctldev, struct gpio_chip *gc,
+ unsigned int offset)
{
struct pinctrl_gpio_range *range;
@@ -304,8 +309,8 @@ pinctrl_match_gpio_range(struct pinctrl_dev *pctldev, unsigned gpio)
/* Loop over the ranges */
list_for_each_entry(range, &pctldev->gpio_ranges, node) {
/* Check if we're in the valid range */
- if (gpio >= range->base &&
- gpio < range->base + range->npins) {
+ if ((gc->base + offset) >= range->base &&
+ (gc->base + offset) < range->base + range->npins) {
mutex_unlock(&pctldev->mutex);
return range;
}
@@ -317,7 +322,8 @@ pinctrl_match_gpio_range(struct pinctrl_dev *pctldev, unsigned gpio)
/**
* pinctrl_ready_for_gpio_range() - check if other GPIO pins of
* the same GPIO chip are in range
- * @gpio: gpio pin to check taken from the global GPIO pin space
+ * @gc: GPIO chip structure from the GPIO subsystem
+ * @offset: hardware offset of the GPIO relative to the controller
*
* This function is complement of pinctrl_match_gpio_range(). If the return
* value of pinctrl_match_gpio_range() is NULL, this function could be used
@@ -328,19 +334,11 @@ pinctrl_match_gpio_range(struct pinctrl_dev *pctldev, unsigned gpio)
* is false, it means that pinctrl device may not be ready.
*/
#ifdef CONFIG_GPIOLIB
-static bool pinctrl_ready_for_gpio_range(unsigned gpio)
+static bool pinctrl_ready_for_gpio_range(struct gpio_chip *gc,
+ unsigned int offset)
{
struct pinctrl_dev *pctldev;
struct pinctrl_gpio_range *range = NULL;
- /*
- * FIXME: "gpio" here is a number in the global GPIO numberspace.
- * get rid of this from the ranges eventually and get the GPIO
- * descriptor from the gpio_chip.
- */
- struct gpio_chip *chip = gpiod_to_chip(gpio_to_desc(gpio));
-
- if (WARN(!chip, "no gpio_chip for gpio%i?", gpio))
- return false;
mutex_lock(&pinctrldev_list_mutex);
@@ -350,8 +348,8 @@ static bool pinctrl_ready_for_gpio_range(unsigned gpio)
mutex_lock(&pctldev->mutex);
list_for_each_entry(range, &pctldev->gpio_ranges, node) {
/* Check if any gpio range overlapped with gpio chip */
- if (range->base + range->npins - 1 < chip->base ||
- range->base > chip->base + chip->ngpio - 1)
+ if (range->base + range->npins - 1 < gc->base ||
+ range->base > gc->base + gc->ngpio - 1)
continue;
mutex_unlock(&pctldev->mutex);
mutex_unlock(&pinctrldev_list_mutex);
@@ -365,12 +363,17 @@ static bool pinctrl_ready_for_gpio_range(unsigned gpio)
return false;
}
#else
-static bool pinctrl_ready_for_gpio_range(unsigned gpio) { return true; }
+static inline bool
+pinctrl_ready_for_gpio_range(struct gpio_chip *gc, unsigned int offset)
+{
+ return true;
+}
#endif
/**
* pinctrl_get_device_gpio_range() - find device for GPIO range
- * @gpio: the pin to locate the pin controller for
+ * @gc: GPIO chip structure from the GPIO subsystem
+ * @offset: hardware offset of the GPIO relative to the controller
* @outdev: the pin control device if found
* @outrange: the GPIO range if found
*
@@ -379,7 +382,8 @@ static bool pinctrl_ready_for_gpio_range(unsigned gpio) { return true; }
* -EPROBE_DEFER if the GPIO range could not be found in any device since it
* may still have not been registered.
*/
-static int pinctrl_get_device_gpio_range(unsigned gpio,
+static int pinctrl_get_device_gpio_range(struct gpio_chip *gc,
+ unsigned int offset,
struct pinctrl_dev **outdev,
struct pinctrl_gpio_range **outrange)
{
@@ -391,7 +395,7 @@ static int pinctrl_get_device_gpio_range(unsigned gpio,
list_for_each_entry(pctldev, &pinctrldev_list, node) {
struct pinctrl_gpio_range *range;
- range = pinctrl_match_gpio_range(pctldev, gpio);
+ range = pinctrl_match_gpio_range(pctldev, gc, offset);
if (range) {
*outdev = pctldev;
*outrange = range;
@@ -445,9 +449,9 @@ struct pinctrl_dev *pinctrl_find_and_add_gpio_range(const char *devname,
* it has not probed yet, so the driver trying to register this
* range need to defer probing.
*/
- if (!pctldev) {
+ if (!pctldev)
return ERR_PTR(-EPROBE_DEFER);
- }
+
pinctrl_add_gpio_range(pctldev, range);
return pctldev;
@@ -753,7 +757,7 @@ int pinctrl_get_group_selector(struct pinctrl_dev *pctldev,
return -EINVAL;
}
-bool pinctrl_gpio_can_use_line(unsigned gpio)
+bool pinctrl_gpio_can_use_line(struct gpio_chip *gc, unsigned int offset)
{
struct pinctrl_dev *pctldev;
struct pinctrl_gpio_range *range;
@@ -765,13 +769,13 @@ bool pinctrl_gpio_can_use_line(unsigned gpio)
* we're probably dealing with GPIO driver
* without a backing pin controller - bail out.
*/
- if (pinctrl_get_device_gpio_range(gpio, &pctldev, &range))
+ if (pinctrl_get_device_gpio_range(gc, offset, &pctldev, &range))
return true;
mutex_lock(&pctldev->mutex);
/* Convert to the pin controllers number space */
- pin = gpio_to_pin(range, gpio);
+ pin = gpio_to_pin(range, gc, offset);
result = pinmux_can_be_used_for_gpio(pctldev, pin);
@@ -783,22 +787,22 @@ EXPORT_SYMBOL_GPL(pinctrl_gpio_can_use_line);
/**
* pinctrl_gpio_request() - request a single pin to be used as GPIO
- * @gpio: the GPIO pin number from the GPIO subsystem number space
+ * @gc: GPIO chip structure from the GPIO subsystem
+ * @offset: hardware offset of the GPIO relative to the controller
*
* This function should *ONLY* be used from gpiolib-based GPIO drivers,
* as part of their gpio_request() semantics, platforms and individual drivers
* shall *NOT* request GPIO pins to be muxed in.
*/
-int pinctrl_gpio_request(unsigned gpio)
+int pinctrl_gpio_request(struct gpio_chip *gc, unsigned int offset)
{
- struct pinctrl_dev *pctldev;
struct pinctrl_gpio_range *range;
- int ret;
- int pin;
+ struct pinctrl_dev *pctldev;
+ int ret, pin;
- ret = pinctrl_get_device_gpio_range(gpio, &pctldev, &range);
+ ret = pinctrl_get_device_gpio_range(gc, offset, &pctldev, &range);
if (ret) {
- if (pinctrl_ready_for_gpio_range(gpio))
+ if (pinctrl_ready_for_gpio_range(gc, offset))
ret = 0;
return ret;
}
@@ -806,9 +810,9 @@ int pinctrl_gpio_request(unsigned gpio)
mutex_lock(&pctldev->mutex);
/* Convert to the pin controllers number space */
- pin = gpio_to_pin(range, gpio);
+ pin = gpio_to_pin(range, gc, offset);
- ret = pinmux_request_gpio(pctldev, range, pin, gpio);
+ ret = pinmux_request_gpio(pctldev, range, pin, gc->base + offset);
mutex_unlock(&pctldev->mutex);
@@ -818,27 +822,27 @@ EXPORT_SYMBOL_GPL(pinctrl_gpio_request);
/**
* pinctrl_gpio_free() - free control on a single pin, currently used as GPIO
- * @gpio: the GPIO pin number from the GPIO subsystem number space
+ * @gc: GPIO chip structure from the GPIO subsystem
+ * @offset: hardware offset of the GPIO relative to the controller
*
* This function should *ONLY* be used from gpiolib-based GPIO drivers,
- * as part of their gpio_free() semantics, platforms and individual drivers
- * shall *NOT* request GPIO pins to be muxed out.
+ * as part of their gpio_request() semantics, platforms and individual drivers
+ * shall *NOT* request GPIO pins to be muxed in.
*/
-void pinctrl_gpio_free(unsigned gpio)
+void pinctrl_gpio_free(struct gpio_chip *gc, unsigned int offset)
{
- struct pinctrl_dev *pctldev;
struct pinctrl_gpio_range *range;
- int ret;
- int pin;
+ struct pinctrl_dev *pctldev;
+ int ret, pin;
- ret = pinctrl_get_device_gpio_range(gpio, &pctldev, &range);
- if (ret) {
+ ret = pinctrl_get_device_gpio_range(gc, offset, &pctldev, &range);
+ if (ret)
return;
- }
+
mutex_lock(&pctldev->mutex);
/* Convert to the pin controllers number space */
- pin = gpio_to_pin(range, gpio);
+ pin = gpio_to_pin(range, gc, offset);
pinmux_free_gpio(pctldev, pin, range);
@@ -846,14 +850,15 @@ void pinctrl_gpio_free(unsigned gpio)
}
EXPORT_SYMBOL_GPL(pinctrl_gpio_free);
-static int pinctrl_gpio_direction(unsigned gpio, bool input)
+static int pinctrl_gpio_direction(struct gpio_chip *gc, unsigned int offset,
+ bool input)
{
struct pinctrl_dev *pctldev;
struct pinctrl_gpio_range *range;
int ret;
int pin;
- ret = pinctrl_get_device_gpio_range(gpio, &pctldev, &range);
+ ret = pinctrl_get_device_gpio_range(gc, offset, &pctldev, &range);
if (ret) {
return ret;
}
@@ -861,7 +866,7 @@ static int pinctrl_gpio_direction(unsigned gpio, bool input)
mutex_lock(&pctldev->mutex);
/* Convert to the pin controllers number space */
- pin = gpio_to_pin(range, gpio);
+ pin = gpio_to_pin(range, gc, offset);
ret = pinmux_gpio_direction(pctldev, range, pin, input);
mutex_unlock(&pctldev->mutex);
@@ -871,54 +876,58 @@ static int pinctrl_gpio_direction(unsigned gpio, bool input)
/**
* pinctrl_gpio_direction_input() - request a GPIO pin to go into input mode
- * @gpio: the GPIO pin number from the GPIO subsystem number space
+ * @gc: GPIO chip structure from the GPIO subsystem
+ * @offset: hardware offset of the GPIO relative to the controller
*
* This function should *ONLY* be used from gpiolib-based GPIO drivers,
* as part of their gpio_direction_input() semantics, platforms and individual
* drivers shall *NOT* touch pin control GPIO calls.
*/
-int pinctrl_gpio_direction_input(unsigned gpio)
+int pinctrl_gpio_direction_input(struct gpio_chip *gc, unsigned int offset)
{
- return pinctrl_gpio_direction(gpio, true);
+ return pinctrl_gpio_direction(gc, offset, true);
}
EXPORT_SYMBOL_GPL(pinctrl_gpio_direction_input);
/**
* pinctrl_gpio_direction_output() - request a GPIO pin to go into output mode
- * @gpio: the GPIO pin number from the GPIO subsystem number space
+ * @gc: GPIO chip structure from the GPIO subsystem
+ * @offset: hardware offset of the GPIO relative to the controller
*
* This function should *ONLY* be used from gpiolib-based GPIO drivers,
* as part of their gpio_direction_output() semantics, platforms and individual
* drivers shall *NOT* touch pin control GPIO calls.
*/
-int pinctrl_gpio_direction_output(unsigned gpio)
+int pinctrl_gpio_direction_output(struct gpio_chip *gc, unsigned int offset)
{
- return pinctrl_gpio_direction(gpio, false);
+ return pinctrl_gpio_direction(gc, offset, false);
}
EXPORT_SYMBOL_GPL(pinctrl_gpio_direction_output);
/**
* pinctrl_gpio_set_config() - Apply config to given GPIO pin
- * @gpio: the GPIO pin number from the GPIO subsystem number space
+ * @gc: GPIO chip structure from the GPIO subsystem
+ * @offset: hardware offset of the GPIO relative to the controller
* @config: the configuration to apply to the GPIO
*
* This function should *ONLY* be used from gpiolib-based GPIO drivers, if
* they need to call the underlying pin controller to change GPIO config
* (for example set debounce time).
*/
-int pinctrl_gpio_set_config(unsigned gpio, unsigned long config)
+int pinctrl_gpio_set_config(struct gpio_chip *gc, unsigned int offset,
+ unsigned long config)
{
unsigned long configs[] = { config };
struct pinctrl_gpio_range *range;
struct pinctrl_dev *pctldev;
int ret, pin;
- ret = pinctrl_get_device_gpio_range(gpio, &pctldev, &range);
+ ret = pinctrl_get_device_gpio_range(gc, offset, &pctldev, &range);
if (ret)
return ret;
mutex_lock(&pctldev->mutex);
- pin = gpio_to_pin(range, gpio);
+ pin = gpio_to_pin(range, gc, offset);
ret = pinconf_set_config(pctldev, pin, configs, ARRAY_SIZE(configs));
mutex_unlock(&pctldev->mutex);