gpio: generic: factor into gpio_chip struct

The separate struct bgpio_chip has been a pain to handle, both
by being confusingly similar in name to struct gpio_chip and
for being contained inside a struct so that struct gpio_chip
is contained in a struct contained in a struct, making several
steps of dereferencing necessary.

Make things simpler: include the fields directly into
<linux/gpio/driver.h>, #ifdef:ed for CONFIG_GENERIC_GPIO, and
get rid of the <linux/basic_mmio_gpio.h> altogether. Prefix
some of the member variables with bgpio_* and add proper
kerneldoc while we're at it.

Modify all users to handle the change and use a struct
gpio_chip directly. And while we're at it: replace all
container_of() dereferencing by gpiochip_get_data() and
registering the gpio_chip with gpiochip_add_data().

Cc: arm@kernel.org
Cc: Alexander Shiyan <shc_work@mail.ru>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
Cc: Olof Johansson <olof@lixom.net>
Cc: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Cc: Rabin Vincent <rabin@rab.in>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-omap@vger.kernel.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: bcm-kernel-feedback-list@broadcom.com
Acked-by: Gregory Fong <gregory.0xf0@gmail.com>
Acked-by: Liviu Dudau <Liviu.Dudau@arm.com>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 0 insertions, 80 deletions

diff --git a/include/linux/basic_mmio_gpio.h b/include/linux/basic_mmio_gpio.h
deleted file mode 100644
index ed3768f4ecc7..000000000000
--- a/include/linux/basic_mmio_gpio.h
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * Basic memory-mapped GPIO controllers.
- *
- * Copyright 2008 MontaVista Software, Inc.
- * Copyright 2008,2010 Anton Vorontsov <cbouatmailru@gmail.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.
- */
-
-#ifndef __BASIC_MMIO_GPIO_H
-#define __BASIC_MMIO_GPIO_H
-
-#include <linux/gpio.h>
-#include <linux/types.h>
-#include <linux/compiler.h>
-#include <linux/spinlock_types.h>
-
-struct bgpio_pdata {
-	const char *label;
-	int base;
-	int ngpio;
-};
-
-struct device;
-
-struct bgpio_chip {
-	struct gpio_chip gc;
-
-	unsigned long (*read_reg)(void __iomem *reg);
-	void (*write_reg)(void __iomem *reg, unsigned long data);
-
-	void __iomem *reg_dat;
-	void __iomem *reg_set;
-	void __iomem *reg_clr;
-	void __iomem *reg_dir;
-
-	/* Number of bits (GPIOs): <register width> * 8. */
-	int bits;
-
-	/*
-	 * Some GPIO controllers work with the big-endian bits notation,
-	 * e.g. in a 8-bits register, GPIO7 is the least significant bit.
-	 */
-	unsigned long (*pin2mask)(struct bgpio_chip *bgc, unsigned int pin);
-
-	/*
-	 * Used to lock bgpio_chip->data. Also, this is needed to keep
-	 * shadowed and real data registers writes together.
-	 */
-	spinlock_t lock;
-
-	/* Shadowed data register to clear/set bits safely. */
-	unsigned long data;
-
-	/* Shadowed direction registers to clear/set direction safely. */
-	unsigned long dir;
-};
-
-static inline struct bgpio_chip *to_bgpio_chip(struct gpio_chip *gc)
-{
-	return container_of(gc, struct bgpio_chip, gc);
-}
-
-int bgpio_remove(struct bgpio_chip *bgc);
-int bgpio_init(struct bgpio_chip *bgc, struct device *dev,
-	       unsigned long sz, void __iomem *dat, void __iomem *set,
-	       void __iomem *clr, void __iomem *dirout, void __iomem *dirin,
-	       unsigned long flags);
-
-#define BGPIOF_BIG_ENDIAN		BIT(0)
-#define BGPIOF_UNREADABLE_REG_SET	BIT(1) /* reg_set is unreadable */
-#define BGPIOF_UNREADABLE_REG_DIR	BIT(2) /* reg_dir is unreadable */
-#define BGPIOF_BIG_ENDIAN_BYTE_ORDER	BIT(3)
-#define BGPIOF_READ_OUTPUT_REG_SET     BIT(4) /* reg_set stores output value */
-#define BGPIOF_NO_OUTPUT		BIT(5) /* only input */
-
-#endif /* __BASIC_MMIO_GPIO_H */