* an error value of -1.
*/
+enum gpio_flags {
+ GPIOFLAG_INPUT,
+ GPIOFLAG_OUTPUT_INIT_LOW,
+ GPIOFLAG_OUTPUT_INIT_HIGH,
+};
+
+struct gpio {
+ unsigned int gpio;
+ enum gpio_flags flags;
+ const char *label;
+};
+
/**
* @deprecated Please use driver model instead
* Request a GPIO. This should be called before any of the other functions
* Note: With driver model, the label is allocated so there is no need for
* the caller to preserve it.
*
- * @param gp GPIO number
+ * @param gpio GPIO number
* @param label User label for this GPIO
* @return 0 if ok, -1 on error
*/
unsigned long flags;
#define GPIOD_REQUESTED (1 << 0) /* Requested/claimed */
#define GPIOD_IS_OUT (1 << 1) /* GPIO is an output */
-#define GPIOD_IS_IN (1 << 2) /* GPIO is an output */
+#define GPIOD_IS_IN (1 << 2) /* GPIO is an input */
#define GPIOD_ACTIVE_LOW (1 << 3) /* value has active low */
#define GPIOD_IS_OUT_ACTIVE (1 << 4) /* set output active */
};
/**
- * dm_gpio_is_valid() - Check if a GPIO is gpio_is_valie
+ * dm_gpio_is_valid() - Check if a GPIO is valid
*
* @desc: GPIO description containing device, offset and flags,
* previously returned by gpio_request_by_name()
*
* @dev: Device to check
* @offset: Offset of device GPIO to check
- * @namep: If non-NULL, this is set to the nane given when the GPIO
+ * @namep: If non-NULL, this is set to the name given when the GPIO
* was requested, or -1 if it has not been requested
* @return -ENODATA if the driver returned an unknown function,
* -ENODEV if the device is not active, -EINVAL if the offset is invalid.
*
* @dev: Device to check
* @offset: Offset of device GPIO to check
- * @namep: If non-NULL, this is set to the nane given when the GPIO
+ * @namep: If non-NULL, this is set to the name given when the GPIO
* was requested, or -1 if it has not been requested
* @return -ENODATA if the driver returned an unknown function,
* -ENODEV if the device is not active, -EINVAL if the offset is invalid.
* Also it would be useful to standardise additional functions like
* pullup, slew rate and drive strength.
*
- * gpio_request)( and gpio_free() are optional - if NULL then they will
+ * gpio_request() and gpio_free() are optional - if NULL then they will
* not be called.
*
* Note that @offset is the offset from the base GPIO of the device. So
*
* @dev: GPIO device
* @desc: Place to put GPIO description
- * @args: Arguments provided in descripion
+ * @args: Arguments provided in description
* @return 0 if OK, -ve on error
*/
int (*xlate)(struct udevice *dev, struct gpio_desc *desc,
*/
const char *gpio_get_bank_info(struct udevice *dev, int *offset_count);
+/**
+ * dm_gpio_lookup_name() - Look up a named GPIO and return its description
+ *
+ * The name of a GPIO is typically its bank name followed by a number from 0.
+ * For example A0 is the first GPIO in bank A. Each bank is a separate driver
+ * model device.
+ *
+ * @name: Name to look up
+ * @desc: Returns description, on success
+ * @return 0 if OK, -ve on error
+ */
+int dm_gpio_lookup_name(const char *name, struct gpio_desc *desc);
+
/**
* gpio_lookup_name - Look up a GPIO name and return its details
*
unsigned int *offsetp, unsigned int *gpiop);
/**
- * get_gpios() - Turn the values of a list of GPIOs into an integer
+ * gpio_get_values_as_int() - Turn the values of a list of GPIOs into an int
*
* This puts the value of the first GPIO into bit 0, the second into bit 1,
* etc. then returns the resulting integer.
*
* @gpio_list: List of GPIOs to collect
- * @return resulting integer value
+ * @return resulting integer value, or -ve on error
*/
-unsigned gpio_get_values_as_int(const int *gpio_list);
+int gpio_get_values_as_int(const int *gpio_list);
+
+/**
+ * gpio_claim_vector() - claim a number of GPIOs for input
+ *
+ * @gpio_num_array: array of gpios to claim, terminated by -1
+ * @fmt: format string for GPIO names, e.g. "board_id%d"
+ * @return 0 if OK, -ve on error
+ */
+int gpio_claim_vector(const int *gpio_num_array, const char *fmt);
/**
* gpio_request_by_name() - Locate and request a GPIO by name
/**
* gpio_request_list_by_name() - Request a list of GPIOs
*
- * Reads all the GPIOs from a list and requetss them. See
+ * Reads all the GPIOs from a list and requests them. See
* gpio_request_by_name() for additional details. Lists should not be
* misused to hold unrelated or optional GPIOs. They should only be used
* for things like parallel data lines. A zero phandle terminates the list
struct gpio_desc *desc_list, int max_count,
int flags);
+/**
+ * dm_gpio_request() - manually request a GPIO
+ *
+ * Note: This function should only be used for testing / debugging. Instead.
+ * use gpio_request_by_name() to pull GPIOs from the device tree.
+ *
+ * @desc: GPIO description of GPIO to request (see dm_gpio_lookup_name())
+ * @label: Label to attach to the GPIO while claimed
+ * @return 0 if OK, -ve on error
+ */
+int dm_gpio_request(struct gpio_desc *desc, const char *label);
+
/**
* gpio_get_list_count() - Returns the number of GPIOs in a list
*
/**
* gpio_get_number() - Get the global GPIO number of a GPIO
*
- * This should only be used for debugging or interest. It returns the nummber
+ * This should only be used for debugging or interest. It returns the number
* that should be used for gpio_get_value() etc. to access this GPIO.
*
* @desc: GPIO description containing device, offset and flags,
*/
int gpio_get_number(struct gpio_desc *desc);
+/**
+ * @deprecated Please use driver model instead
+ * Request a GPIO and configure it
+ * @param gpios pointer to array of gpio defs
+ * @param count number of GPIOs to set up
+ */
+static inline int gpio_request_one(unsigned int gpio, enum gpio_flags flags,
+ const char *label)
+{
+ int ret;
+
+ ret = gpio_request(gpio, label);
+ if (ret)
+ return ret;
+
+ if (flags == GPIOFLAG_INPUT)
+ gpio_direction_input(gpio);
+ else if (flags == GPIOFLAG_OUTPUT_INIT_LOW)
+ gpio_direction_output(gpio, 0);
+ else if (flags == GPIOFLAG_OUTPUT_INIT_HIGH)
+ gpio_direction_output(gpio, 1);
+
+ return ret;
+}
+
+/**
+ * Request a set of GPIOs and configure them
+ * @param gpios pointer to array of gpio defs
+ * @param count number of GPIOs to set up
+ */
+static inline int gpio_request_array(const struct gpio *gpios, int count)
+{
+ int ret;
+ int i;
+
+ for (i = 0; i < count; i++) {
+ ret = gpio_request_one(gpios[i].gpio, gpios[i].flags,
+ gpios[i].label);
+ if (ret) {
+ printf("Failed to request GPIO%d (%u of %u): %d\n",
+ gpios[i].gpio, i, count, ret);
+ goto error;
+ }
+ }
+ return 0;
+
+error:
+ while (--i >= 0)
+ gpio_free(gpios[i].gpio);
+
+ return ret;
+}
+
+/**
+ * @deprecated Please use driver model instead
+ * Release a set of GPIOs
+ * @param gpios pointer to array of gpio defs
+ * @param count number of GPIOs to set up
+ */
+static inline int gpio_free_array(const struct gpio *gpios, int count)
+{
+ int ret = 0;
+ int i;
+
+ for (i = 0; i < count; i++)
+ ret |= gpio_free(gpios[i].gpio);
+
+ return ret;
+}
#endif /* _ASM_GENERIC_GPIO_H_ */
projects / karo-tx-uboot.git / blobdiff