dm: fdt: Remove the old GPIO functions
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
parent
6f755eb66b
commit
009067c3b7
@ -231,39 +231,6 @@ int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
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int cell_count, int index,
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struct fdtdec_phandle_args *out_args);
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/* GPIOs are numbered from 0 */
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enum {
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FDT_GPIO_NONE = -1U, /* an invalid GPIO used to end our list */
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FDT_GPIO_ACTIVE_LOW = 1 << 0, /* input is active low (else high) */
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};
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/* This is the state of a GPIO pin as defined by the fdt */
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struct fdt_gpio_state {
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const char *name; /* name of the fdt property defining this */
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uint gpio; /* GPIO number, or FDT_GPIO_NONE if none */
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u8 flags; /* FDT_GPIO_... flags */
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};
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/* This tells us whether a fdt_gpio_state record is valid or not */
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#define fdt_gpio_isvalid(x) ((x)->gpio != FDT_GPIO_NONE)
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/**
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* Read the GPIO taking into account the polarity of the pin.
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*
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* @param gpio pointer to the decoded gpio
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* @return value of the gpio if successful, < 0 if unsuccessful
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*/
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int fdtdec_get_gpio(struct fdt_gpio_state *gpio);
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/**
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* Write the GPIO taking into account the polarity of the pin.
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*
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* @param gpio pointer to the decoded gpio
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* @return 0 if successful
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*/
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int fdtdec_set_gpio(struct fdt_gpio_state *gpio, int val);
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/**
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* Find the next numbered alias for a peripheral. This is used to enumerate
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* all the peripherals of a certain type.
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@ -644,50 +611,6 @@ const u32 *fdtdec_locate_array(const void *blob, int node,
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*/
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int fdtdec_get_bool(const void *blob, int node, const char *prop_name);
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/**
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* Decode a single GPIOs from an FDT.
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*
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* If the property is not found, then the GPIO structure will still be
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* initialised, with gpio set to FDT_GPIO_NONE. This makes it easy to
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* provide optional GPIOs.
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*
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* @param blob FDT blob to use
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* @param node Node to look at
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* @param prop_name Node property name
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* @param gpio gpio elements to fill from FDT
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* @return 0 if ok, -FDT_ERR_NOTFOUND if the property is missing.
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*/
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int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name,
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struct fdt_gpio_state *gpio);
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/**
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* Decode a list of GPIOs from an FDT. This creates a list of GPIOs with no
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* terminating item.
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*
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* @param blob FDT blob to use
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* @param node Node to look at
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* @param prop_name Node property name
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* @param gpio Array of gpio elements to fill from FDT. This will be
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* untouched if either 0 or an error is returned
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* @param max_count Maximum number of elements allowed
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* @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would
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* be exceeded, or -FDT_ERR_NOTFOUND if the property is missing.
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*/
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int fdtdec_decode_gpios(const void *blob, int node, const char *prop_name,
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struct fdt_gpio_state *gpio, int max_count);
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/**
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* Set up a GPIO pin according to the provided gpio information. At present this
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* just requests the GPIO.
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*
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* If the gpio is FDT_GPIO_NONE, no action is taken. This makes it easy to
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* deal with optional GPIOs.
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*
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* @param gpio GPIO info to use for set up
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* @return 0 if all ok or gpio was FDT_GPIO_NONE; -1 on error
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*/
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int fdtdec_setup_gpio(struct fdt_gpio_state *gpio);
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/**
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* Look in the FDT for a config item with the given name and return its value
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* as a 32-bit integer. The property must have at least 4 bytes of data. The
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95
lib/fdtdec.c
95
lib/fdtdec.c
@ -803,101 +803,6 @@ int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
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return rc;
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}
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/**
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* Decode a list of GPIOs from an FDT. This creates a list of GPIOs with no
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* terminating item.
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*
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* @param blob FDT blob to use
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* @param node Node to look at
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* @param prop_name Node property name
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* @param gpio Array of gpio elements to fill from FDT. This will be
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* untouched if either 0 or an error is returned
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* @param max_count Maximum number of elements allowed
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* @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would
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* be exceeded, or -FDT_ERR_NOTFOUND if the property is missing.
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*/
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int fdtdec_decode_gpios(const void *blob, int node, const char *prop_name,
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struct fdt_gpio_state *gpio, int max_count)
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{
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const struct fdt_property *prop;
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const u32 *cell;
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const char *name;
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int len, i;
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debug("%s: %s\n", __func__, prop_name);
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assert(max_count > 0);
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prop = fdt_get_property(blob, node, prop_name, &len);
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if (!prop) {
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debug("%s: property '%s' missing\n", __func__, prop_name);
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return -FDT_ERR_NOTFOUND;
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}
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/* We will use the name to tag the GPIO */
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name = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
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cell = (u32 *)prop->data;
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len /= sizeof(u32) * 3; /* 3 cells per GPIO record */
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if (len > max_count) {
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debug(" %s: too many GPIOs / cells for "
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"property '%s'\n", __func__, prop_name);
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return -FDT_ERR_BADLAYOUT;
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}
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/* Read out the GPIO data from the cells */
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for (i = 0; i < len; i++, cell += 3) {
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gpio[i].gpio = fdt32_to_cpu(cell[1]);
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gpio[i].flags = fdt32_to_cpu(cell[2]);
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gpio[i].name = name;
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}
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return len;
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}
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int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name,
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struct fdt_gpio_state *gpio)
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{
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int err;
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debug("%s: %s\n", __func__, prop_name);
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gpio->gpio = FDT_GPIO_NONE;
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gpio->name = NULL;
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err = fdtdec_decode_gpios(blob, node, prop_name, gpio, 1);
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return err == 1 ? 0 : err;
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}
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int fdtdec_get_gpio(struct fdt_gpio_state *gpio)
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{
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int val;
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if (!fdt_gpio_isvalid(gpio))
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return -1;
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val = gpio_get_value(gpio->gpio);
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return gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val;
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}
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int fdtdec_set_gpio(struct fdt_gpio_state *gpio, int val)
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{
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if (!fdt_gpio_isvalid(gpio))
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return -1;
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val = gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val;
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return gpio_set_value(gpio->gpio, val);
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}
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int fdtdec_setup_gpio(struct fdt_gpio_state *gpio)
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{
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/*
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* Return success if there is no GPIO defined. This is used for
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* optional GPIOs)
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*/
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if (!fdt_gpio_isvalid(gpio))
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return 0;
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if (gpio_request(gpio->gpio, gpio->name))
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return -1;
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return 0;
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}
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int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
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u8 *array, int count)
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{
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