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dm: fdt: Remove the old GPIO functions

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Now that we support device tree GPIO bindings directly in the driver model
GPIO uclass we can remove these functions.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2015-01-05 20:05:43 -07:00
parent 6f755eb66b
commit 009067c3b7
2 changed files with 0 additions and 172 deletions
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77
include/fdtdec.h
View file

@ -231,39 +231,6 @@ int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
int cell_count, int index, int cell_count, int index,
struct fdtdec_phandle_args *out_args); 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 * Find the next numbered alias for a peripheral. This is used to enumerate
* all the peripherals of a certain type. * all the peripherals of a certain type.
@ -644,50 +611,6 @@ const u32 *fdtdec_locate_array(const void *blob, int node,
*/ */
int fdtdec_get_bool(const void *blob, int node, const char *prop_name); 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 * 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 * as a 32-bit integer. The property must have at least 4 bytes of data. The

95
lib/fdtdec.c
View file

@ -803,101 +803,6 @@ int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
return rc; 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, int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
u8 *array, int count) u8 *array, int count)
{ {