gpiolib: of: Get rid of <linux/gpio/legacy-of-mm-gpiochip.h>

Last user of linux/gpio/legacy-of-mm-gpiochip.h is gone.

Remove linux/gpio/legacy-of-mm-gpiochip.h and
CONFIG_OF_GPIO_MM_GPIOCHIP

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

drivers/gpio/Kconfig

@@ -42,14 +42,6 @@ config GPIOLIB_IRQCHIP
 	select IRQ_DOMAIN
 	bool
 
-config OF_GPIO_MM_GPIOCHIP
-	bool
-	help
-	  This adds support for the legacy 'struct of_mm_gpio_chip' interface
-	  from PowerPC. Existing drivers using this interface need to select
-	  this symbol, but new drivers should use the generic gpio-regmap
-	  infrastructure instead.
-
 config DEBUG_GPIO
 	bool "Debug GPIO calls"
 	depends on DEBUG_KERNEL

drivers/gpio/TODO

@@ -86,17 +86,6 @@ Work items:
 
 -------------------------------------------------------------------------------
 
-Get rid of <linux/gpio/legacy-of-mm-gpiochip.h>
-
-Work items:
-
-- Get rid of struct of_mm_gpio_chip altogether: use the generic  MMIO
-  GPIO for all current users (see below). Delete struct of_mm_gpio_chip,
-  to_of_mm_gpio_chip(), of_mm_gpiochip_add_data(), of_mm_gpiochip_remove(),
-  CONFIG_OF_GPIO_MM_GPIOCHIP from the kernel.
-
--------------------------------------------------------------------------------
-
 Collect drivers
 
 Collect GPIO drivers from arch/* and other places that should be placed

drivers/gpio/gpiolib-of.c

@@ -1031,85 +1031,6 @@ static int of_gpio_threecell_xlate(struct gpio_chip *gc,
 	return gpiospec->args[1];
 }
 
-#if IS_ENABLED(CONFIG_OF_GPIO_MM_GPIOCHIP)
-#include <linux/gpio/legacy-of-mm-gpiochip.h>
-/**
- * of_mm_gpiochip_add_data - Add memory mapped GPIO chip (bank)
- * @np:		device node of the GPIO chip
- * @mm_gc:	pointer to the of_mm_gpio_chip allocated structure
- * @data:	driver data to store in the struct gpio_chip
- *
- * 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.
- *
- * Returns:
- * 0 on success, or negative errno on failure.
- */
-int of_mm_gpiochip_add_data(struct device_node *np,
-			    struct of_mm_gpio_chip *mm_gc,
-			    void *data)
-{
-	int ret = -ENOMEM;
-	struct gpio_chip *gc = &mm_gc->gc;
-
-	gc->label = kasprintf(GFP_KERNEL, "%pOF", np);
-	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);
-
-	fwnode_handle_put(mm_gc->gc.fwnode);
-	mm_gc->gc.fwnode = fwnode_handle_get(of_fwnode_handle(np));
-
-	ret = gpiochip_add_data(gc, data);
-	if (ret)
-		goto err2;
-
-	return 0;
-err2:
-	of_node_put(np);
-	iounmap(mm_gc->regs);
-err1:
-	kfree(gc->label);
-err0:
-	pr_err("%pOF: GPIO chip registration failed with status %d\n", np, ret);
-	return ret;
-}
-EXPORT_SYMBOL_GPL(of_mm_gpiochip_add_data);
-
-/**
- * of_mm_gpiochip_remove - Remove memory mapped GPIO chip (bank)
- * @mm_gc:	pointer to the of_mm_gpio_chip allocated structure
- */
-void of_mm_gpiochip_remove(struct of_mm_gpio_chip *mm_gc)
-{
-	struct gpio_chip *gc = &mm_gc->gc;
-
-	gpiochip_remove(gc);
-	iounmap(mm_gc->regs);
-	kfree(gc->label);
-}
-EXPORT_SYMBOL_GPL(of_mm_gpiochip_remove);
-#endif
-
 #ifdef CONFIG_PINCTRL
 static int of_gpiochip_add_pin_range(struct gpio_chip *chip)
 {

include/linux/gpio/legacy-of-mm-gpiochip.h

@@ -1,36 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0+ */
-/*
- * OF helpers for the old of_mm_gpio_chip, used on ppc32 and nios2,
- * do not use in new code.
- *
- * Copyright (c) 2007-2008  MontaVista Software, Inc.
- *
- * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
- */
-
-#ifndef __LINUX_GPIO_LEGACY_OF_MM_GPIO_CHIP_H
-#define __LINUX_GPIO_LEGACY_OF_MM_GPIO_CHIP_H
-
-#include <linux/gpio/driver.h>
-#include <linux/of.h>
-
-/*
- * OF GPIO chip for memory mapped banks
- */
-struct of_mm_gpio_chip {
-	struct gpio_chip gc;
-	void (*save_regs)(struct of_mm_gpio_chip *mm_gc);
-	void __iomem *regs;
-};
-
-static inline struct of_mm_gpio_chip *to_of_mm_gpio_chip(struct gpio_chip *gc)
-{
-	return container_of(gc, struct of_mm_gpio_chip, gc);
-}
-
-extern int of_mm_gpiochip_add_data(struct device_node *np,
-				   struct of_mm_gpio_chip *mm_gc,
-				   void *data);
-extern void of_mm_gpiochip_remove(struct of_mm_gpio_chip *mm_gc);
-
-#endif /* __LINUX_GPIO_LEGACY_OF_MM_GPIO_CHIP_H */