int cell_count, int index,
struct fdtdec_phandle_args *out_args);
-/* GPIOs are numbered from 0 */
-enum {
- FDT_GPIO_NONE = -1U, /* an invalid GPIO used to end our list */
-
- FDT_GPIO_ACTIVE_LOW = 1 << 0, /* input is active low (else high) */
-};
-
-/* This is the state of a GPIO pin as defined by the fdt */
-struct fdt_gpio_state {
- const char *name; /* name of the fdt property defining this */
- uint gpio; /* GPIO number, or FDT_GPIO_NONE if none */
- u8 flags; /* FDT_GPIO_... flags */
-};
-
-/* This tells us whether a fdt_gpio_state record is valid or not */
-#define fdt_gpio_isvalid(x) ((x)->gpio != FDT_GPIO_NONE)
-
-/**
- * Read the GPIO taking into account the polarity of the pin.
- *
- * @param gpio pointer to the decoded gpio
- * @return value of the gpio if successful, < 0 if unsuccessful
- */
-int fdtdec_get_gpio(struct fdt_gpio_state *gpio);
-
-/**
- * Write the GPIO taking into account the polarity of the pin.
- *
- * @param gpio pointer to the decoded gpio
- * @return 0 if successful
- */
-int fdtdec_set_gpio(struct fdt_gpio_state *gpio, int val);
-
/**
* Find the next numbered alias for a peripheral. This is used to enumerate
* all the peripherals of a certain type.
*/
int fdtdec_get_bool(const void *blob, int node, const char *prop_name);
-/**
- * Decode a single GPIOs from an FDT.
- *
- * If the property is not found, then the GPIO structure will still be
- * initialised, with gpio set to FDT_GPIO_NONE. This makes it easy to
- * provide optional GPIOs.
- *
- * @param blob FDT blob to use
- * @param node Node to look at
- * @param prop_name Node property name
- * @param gpio gpio elements to fill from FDT
- * @return 0 if ok, -FDT_ERR_NOTFOUND if the property is missing.
- */
-int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name,
- struct fdt_gpio_state *gpio);
-
-/**
- * Decode a list of GPIOs from an FDT. This creates a list of GPIOs with no
- * terminating item.
- *
- * @param blob FDT blob to use
- * @param node Node to look at
- * @param prop_name Node property name
- * @param gpio Array of gpio elements to fill from FDT. This will be
- * untouched if either 0 or an error is returned
- * @param max_count Maximum number of elements allowed
- * @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would
- * be exceeded, or -FDT_ERR_NOTFOUND if the property is missing.
- */
-int fdtdec_decode_gpios(const void *blob, int node, const char *prop_name,
- struct fdt_gpio_state *gpio, int max_count);
-
-/**
- * Set up a GPIO pin according to the provided gpio information. At present this
- * just requests the GPIO.
- *
- * If the gpio is FDT_GPIO_NONE, no action is taken. This makes it easy to
- * deal with optional GPIOs.
- *
- * @param gpio GPIO info to use for set up
- * @return 0 if all ok or gpio was FDT_GPIO_NONE; -1 on error
- */
-int fdtdec_setup_gpio(struct fdt_gpio_state *gpio);
-
/**
* Look in the FDT for a config item with the given name and return its value
* as a 32-bit integer. The property must have at least 4 bytes of data. The
return rc;
}
-/**
- * Decode a list of GPIOs from an FDT. This creates a list of GPIOs with no
- * terminating item.
- *
- * @param blob FDT blob to use
- * @param node Node to look at
- * @param prop_name Node property name
- * @param gpio Array of gpio elements to fill from FDT. This will be
- * untouched if either 0 or an error is returned
- * @param max_count Maximum number of elements allowed
- * @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would
- * be exceeded, or -FDT_ERR_NOTFOUND if the property is missing.
- */
-int fdtdec_decode_gpios(const void *blob, int node, const char *prop_name,
- struct fdt_gpio_state *gpio, int max_count)
-{
- const struct fdt_property *prop;
- const u32 *cell;
- const char *name;
- int len, i;
-
- debug("%s: %s\n", __func__, prop_name);
- assert(max_count > 0);
- prop = fdt_get_property(blob, node, prop_name, &len);
- if (!prop) {
- debug("%s: property '%s' missing\n", __func__, prop_name);
- return -FDT_ERR_NOTFOUND;
- }
-
- /* We will use the name to tag the GPIO */
- name = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
- cell = (u32 *)prop->data;
- len /= sizeof(u32) * 3; /* 3 cells per GPIO record */
- if (len > max_count) {
- debug(" %s: too many GPIOs / cells for "
- "property '%s'\n", __func__, prop_name);
- return -FDT_ERR_BADLAYOUT;
- }
-
- /* Read out the GPIO data from the cells */
- for (i = 0; i < len; i++, cell += 3) {
- gpio[i].gpio = fdt32_to_cpu(cell[1]);
- gpio[i].flags = fdt32_to_cpu(cell[2]);
- gpio[i].name = name;
- }
-
- return len;
-}
-
-int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name,
- struct fdt_gpio_state *gpio)
-{
- int err;
-
- debug("%s: %s\n", __func__, prop_name);
- gpio->gpio = FDT_GPIO_NONE;
- gpio->name = NULL;
- err = fdtdec_decode_gpios(blob, node, prop_name, gpio, 1);
- return err == 1 ? 0 : err;
-}
-
-int fdtdec_get_gpio(struct fdt_gpio_state *gpio)
-{
- int val;
-
- if (!fdt_gpio_isvalid(gpio))
- return -1;
-
- val = gpio_get_value(gpio->gpio);
- return gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val;
-}
-
-int fdtdec_set_gpio(struct fdt_gpio_state *gpio, int val)
-{
- if (!fdt_gpio_isvalid(gpio))
- return -1;
-
- val = gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val;
- return gpio_set_value(gpio->gpio, val);
-}
-
-int fdtdec_setup_gpio(struct fdt_gpio_state *gpio)
-{
- /*
- * Return success if there is no GPIO defined. This is used for
- * optional GPIOs)
- */
- if (!fdt_gpio_isvalid(gpio))
- return 0;
-
- if (gpio_request(gpio->gpio, gpio->name))
- return -1;
- return 0;
-}
-
int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
u8 *array, int count)
{
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