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-rw-r--r--drivers/of/gpio.c240
1 files changed, 0 insertions, 240 deletions
diff --git a/drivers/of/gpio.c b/drivers/of/gpio.c
deleted file mode 100644
index bf984b6dc477..000000000000
--- a/drivers/of/gpio.c
+++ /dev/null
@@ -1,240 +0,0 @@
-/*
- * OF helpers for the GPIO API
- *
- * Copyright (c) 2007-2008 MontaVista Software, Inc.
- *
- * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/device.h>
-#include <linux/errno.h>
-#include <linux/module.h>
-#include <linux/io.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/of_gpio.h>
-#include <linux/slab.h>
-
-/**
- * of_get_named_gpio_flags() - Get a GPIO number and flags to use with GPIO API
- * @np: device node to get GPIO from
- * @propname: property name containing gpio specifier(s)
- * @index: index of the GPIO
- * @flags: a flags pointer to fill in
- *
- * Returns GPIO number to use with Linux generic GPIO API, or one of the errno
- * value on the error condition. If @flags is not NULL the function also fills
- * in flags for the GPIO.
- */
-int of_get_named_gpio_flags(struct device_node *np, const char *propname,
- int index, enum of_gpio_flags *flags)
-{
- int ret;
- struct gpio_chip *gc;
- struct of_phandle_args gpiospec;
-
- ret = of_parse_phandle_with_args(np, propname, "#gpio-cells", index,
- &gpiospec);
- if (ret) {
- pr_debug("%s: can't parse gpios property\n", __func__);
- goto err0;
- }
-
- gc = of_node_to_gpiochip(gpiospec.np);
- if (!gc) {
- pr_debug("%s: gpio controller %s isn't registered\n",
- np->full_name, gpiospec.np->full_name);
- ret = -ENODEV;
- goto err1;
- }
-
- if (gpiospec.args_count != gc->of_gpio_n_cells) {
- pr_debug("%s: wrong #gpio-cells for %s\n",
- np->full_name, gpiospec.np->full_name);
- ret = -EINVAL;
- goto err1;
- }
-
- /* .xlate might decide to not fill in the flags, so clear it. */
- if (flags)
- *flags = 0;
-
- ret = gc->of_xlate(gc, &gpiospec, flags);
- if (ret < 0)
- goto err1;
-
- ret += gc->base;
-err1:
- of_node_put(gpiospec.np);
-err0:
- pr_debug("%s exited with status %d\n", __func__, ret);
- return ret;
-}
-EXPORT_SYMBOL(of_get_named_gpio_flags);
-
-/**
- * of_gpio_named_count - Count GPIOs for a device
- * @np: device node to count GPIOs for
- * @propname: property name containing gpio specifier(s)
- *
- * The function returns the count of GPIOs specified for a node.
- *
- * Note that the empty GPIO specifiers counts too. For example,
- *
- * gpios = <0
- * &pio1 1 2
- * 0
- * &pio2 3 4>;
- *
- * defines four GPIOs (so this function will return 4), two of which
- * are not specified.
- */
-unsigned int of_gpio_named_count(struct device_node *np, const char* propname)
-{
- unsigned int cnt = 0;
-
- do {
- int ret;
-
- ret = of_parse_phandle_with_args(np, propname, "#gpio-cells",
- cnt, NULL);
- /* A hole in the gpios = <> counts anyway. */
- if (ret < 0 && ret != -EEXIST)
- break;
- } while (++cnt);
-
- return cnt;
-}
-EXPORT_SYMBOL(of_gpio_named_count);
-
-/**
- * of_gpio_simple_xlate - translate gpio_spec to the GPIO number and flags
- * @gc: pointer to the gpio_chip structure
- * @np: device node of the GPIO chip
- * @gpio_spec: gpio specifier as found in the device tree
- * @flags: a flags pointer to fill in
- *
- * This is simple translation function, suitable for the most 1:1 mapped
- * gpio chips. This function performs only one sanity check: whether gpio
- * is less than ngpios (that is specified in the gpio_chip).
- */
-int of_gpio_simple_xlate(struct gpio_chip *gc,
- const struct of_phandle_args *gpiospec, u32 *flags)
-{
- /*
- * We're discouraging gpio_cells < 2, since that way you'll have to
- * write your own xlate function (that will have to retrive the GPIO
- * number and the flags from a single gpio cell -- this is possible,
- * but not recommended).
- */
- if (gc->of_gpio_n_cells < 2) {
- WARN_ON(1);
- return -EINVAL;
- }
-
- if (WARN_ON(gpiospec->args_count < gc->of_gpio_n_cells))
- return -EINVAL;
-
- if (gpiospec->args[0] >= gc->ngpio)
- return -EINVAL;
-
- if (flags)
- *flags = gpiospec->args[1];
-
- return gpiospec->args[0];
-}
-EXPORT_SYMBOL(of_gpio_simple_xlate);
-
-/**
- * of_mm_gpiochip_add - Add memory mapped GPIO chip (bank)
- * @np: device node of the GPIO chip
- * @mm_gc: pointer to the of_mm_gpio_chip allocated structure
- *
- * To use this function you should allocate and fill mm_gc with:
- *
- * 1) In the gpio_chip structure:
- * - all the callbacks
- * - of_gpio_n_cells
- * - of_xlate callback (optional)
- *
- * 3) In the of_mm_gpio_chip structure:
- * - save_regs callback (optional)
- *
- * If succeeded, this function will map bank's memory and will
- * do all necessary work for you. Then you'll able to use .regs
- * to manage GPIOs from the callbacks.
- */
-int of_mm_gpiochip_add(struct device_node *np,
- struct of_mm_gpio_chip *mm_gc)
-{
- int ret = -ENOMEM;
- struct gpio_chip *gc = &mm_gc->gc;
-
- gc->label = kstrdup(np->full_name, GFP_KERNEL);
- if (!gc->label)
- goto err0;
-
- mm_gc->regs = of_iomap(np, 0);
- if (!mm_gc->regs)
- goto err1;
-
- gc->base = -1;
-
- if (mm_gc->save_regs)
- mm_gc->save_regs(mm_gc);
-
- mm_gc->gc.of_node = np;
-
- ret = gpiochip_add(gc);
- if (ret)
- goto err2;
-
- return 0;
-err2:
- iounmap(mm_gc->regs);
-err1:
- kfree(gc->label);
-err0:
- pr_err("%s: GPIO chip registration failed with status %d\n",
- np->full_name, ret);
- return ret;
-}
-EXPORT_SYMBOL(of_mm_gpiochip_add);
-
-void of_gpiochip_add(struct gpio_chip *chip)
-{
- if ((!chip->of_node) && (chip->dev))
- chip->of_node = chip->dev->of_node;
-
- if (!chip->of_node)
- return;
-
- if (!chip->of_xlate) {
- chip->of_gpio_n_cells = 2;
- chip->of_xlate = of_gpio_simple_xlate;
- }
-
- of_node_get(chip->of_node);
-}
-
-void of_gpiochip_remove(struct gpio_chip *chip)
-{
- if (chip->of_node)
- of_node_put(chip->of_node);
-}
-
-/* Private function for resolving node pointer to gpio_chip */
-static int of_gpiochip_is_match(struct gpio_chip *chip, const void *data)
-{
- return chip->of_node == data;
-}
-
-struct gpio_chip *of_node_to_gpiochip(struct device_node *np)
-{
- return gpiochip_find(np, of_gpiochip_is_match);
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 07:52:49 +0000