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-rw-r--r--include/linux/basic_mmio_gpio.h80
-rw-r--r--include/linux/gpio/driver.h75
-rw-r--r--include/linux/of_gpio.h13
-rw-r--r--include/linux/platform_data/gpio-rcar.h29
4 files changed, 81 insertions, 116 deletions
diff --git a/include/linux/basic_mmio_gpio.h b/include/linux/basic_mmio_gpio.h
deleted file mode 100644
index ed3768f..0000000
--- 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 */
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index d1baebf..82fda48 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -8,6 +8,7 @@
#include <linux/irqdomain.h>
#include <linux/lockdep.h>
#include <linux/pinctrl/pinctrl.h>
+#include <linux/kconfig.h>
struct device;
struct gpio_desc;
@@ -20,9 +21,10 @@ struct seq_file;
/**
* struct gpio_chip - abstract a GPIO controller
* @label: for diagnostics
- * @dev: optional device providing the GPIOs
+ * @parent: optional parent device providing the GPIOs
* @cdev: class device used by sysfs interface (may be NULL)
* @owner: helps prevent removal of modules exporting active GPIOs
+ * @data: per-instance data assigned by the driver
* @list: links gpio_chips together for traversal
* @request: optional hook for chip-specific activation, such as
* enabling module power and clock; may sleep
@@ -32,8 +34,7 @@ struct seq_file;
* (same as GPIOF_DIR_XXX), or negative error
* @direction_input: configures signal "offset" as input, or returns error
* @direction_output: configures signal "offset" as output, or returns error
- * @get: returns value for signal "offset"; for output signals this
- * returns either the value actually sensed, or zero
+ * @get: returns value for signal "offset", 0=low, 1=high, or negative error
* @set: assigns output value for signal "offset"
* @set_multiple: assigns output values for multiple signals defined by "mask"
* @set_debounce: optional hook for setting debounce time for specified gpio in
@@ -65,6 +66,23 @@ struct seq_file;
* registers.
* @irq_not_threaded: flag must be set if @can_sleep is set but the
* IRQs don't need to be threaded
+ * @read_reg: reader function for generic GPIO
+ * @write_reg: writer function for generic GPIO
+ * @pin2mask: some generic GPIO controllers work with the big-endian bits
+ * notation, e.g. in a 8-bits register, GPIO7 is the least significant
+ * bit. This callback assigns the right bit mask.
+ * @reg_dat: data (in) register for generic GPIO
+ * @reg_set: output set register (out=high) for generic GPIO
+ * @reg_clk: output clear register (out=low) for generic GPIO
+ * @reg_dir: direction setting register for generic GPIO
+ * @bgpio_bits: number of register bits used for a generic GPIO i.e.
+ * <register width> * 8
+ * @bgpio_lock: used to lock chip->bgpio_data. Also, this is needed to keep
+ * shadowed and real data registers writes together.
+ * @bgpio_data: shadowed data register for generic GPIO to clear/set bits
+ * safely.
+ * @bgpio_dir: shadowed direction register for generic GPIO to clear/set
+ * direction safely.
* @irqchip: GPIO IRQ chip impl, provided by GPIO driver
* @irqdomain: Interrupt translation domain; responsible for mapping
* between GPIO hwirq number and linux irq number
@@ -89,9 +107,10 @@ struct seq_file;
*/
struct gpio_chip {
const char *label;
- struct device *dev;
+ struct device *parent;
struct device *cdev;
struct module *owner;
+ void *data;
struct list_head list;
int (*request)(struct gpio_chip *chip,
@@ -127,6 +146,20 @@ struct gpio_chip {
bool can_sleep;
bool irq_not_threaded;
+#if IS_ENABLED(CONFIG_GPIO_GENERIC)
+ unsigned long (*read_reg)(void __iomem *reg);
+ void (*write_reg)(void __iomem *reg, unsigned long data);
+ unsigned long (*pin2mask)(struct gpio_chip *gc, unsigned int pin);
+ void __iomem *reg_dat;
+ void __iomem *reg_set;
+ void __iomem *reg_clr;
+ void __iomem *reg_dir;
+ int bgpio_bits;
+ spinlock_t bgpio_lock;
+ unsigned long bgpio_data;
+ unsigned long bgpio_dir;
+#endif
+
#ifdef CONFIG_GPIOLIB_IRQCHIP
/*
* With CONFIG_GPIOLIB_IRQCHIP we get an irqchip inside the gpiolib
@@ -166,7 +199,11 @@ extern const char *gpiochip_is_requested(struct gpio_chip *chip,
unsigned offset);
/* add/remove chips */
-extern int gpiochip_add(struct gpio_chip *chip);
+extern int gpiochip_add_data(struct gpio_chip *chip, void *data);
+static inline int gpiochip_add(struct gpio_chip *chip)
+{
+ return gpiochip_add_data(chip, NULL);
+}
extern void gpiochip_remove(struct gpio_chip *chip);
extern struct gpio_chip *gpiochip_find(void *data,
int (*match)(struct gpio_chip *chip, void *data));
@@ -175,8 +212,36 @@ extern struct gpio_chip *gpiochip_find(void *data,
int gpiochip_lock_as_irq(struct gpio_chip *chip, unsigned int offset);
void gpiochip_unlock_as_irq(struct gpio_chip *chip, unsigned int offset);
+/* get driver data */
+static inline void *gpiochip_get_data(struct gpio_chip *chip)
+{
+ return chip->data;
+}
+
struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc);
+struct bgpio_pdata {
+ const char *label;
+ int base;
+ int ngpio;
+};
+
+#if IS_ENABLED(CONFIG_GPIO_GENERIC)
+
+int bgpio_init(struct gpio_chip *gc, 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
+
#ifdef CONFIG_GPIOLIB_IRQCHIP
void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip,
diff --git a/include/linux/of_gpio.h b/include/linux/of_gpio.h
index 87d6d16..092186c 100644
--- a/include/linux/of_gpio.h
+++ b/include/linux/of_gpio.h
@@ -51,8 +51,14 @@ static inline struct of_mm_gpio_chip *to_of_mm_gpio_chip(struct gpio_chip *gc)
extern int of_get_named_gpio_flags(struct device_node *np,
const char *list_name, int index, enum of_gpio_flags *flags);
-extern int of_mm_gpiochip_add(struct device_node *np,
- struct of_mm_gpio_chip *mm_gc);
+extern int of_mm_gpiochip_add_data(struct device_node *np,
+ struct of_mm_gpio_chip *mm_gc,
+ void *data);
+static inline int of_mm_gpiochip_add(struct device_node *np,
+ struct of_mm_gpio_chip *mm_gc)
+{
+ return of_mm_gpiochip_add_data(np, mm_gc, NULL);
+}
extern void of_mm_gpiochip_remove(struct of_mm_gpio_chip *mm_gc);
extern int of_gpiochip_add(struct gpio_chip *gc);
@@ -67,6 +73,9 @@ extern int of_gpio_simple_xlate(struct gpio_chip *gc,
static inline int of_get_named_gpio_flags(struct device_node *np,
const char *list_name, int index, enum of_gpio_flags *flags)
{
+ if (flags)
+ *flags = 0;
+
return -ENOSYS;
}
diff --git a/include/linux/platform_data/gpio-rcar.h b/include/linux/platform_data/gpio-rcar.h
deleted file mode 100644
index 2d8d694..0000000
--- a/include/linux/platform_data/gpio-rcar.h
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
- * Renesas R-Car GPIO Support
- *
- * Copyright (C) 2013 Magnus Damm
- *
- * 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
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#ifndef __GPIO_RCAR_H__
-#define __GPIO_RCAR_H__
-
-struct gpio_rcar_config {
- int gpio_base;
- unsigned int irq_base;
- unsigned int number_of_pins;
- const char *pctl_name;
- unsigned has_both_edge_trigger:1;
-};
-
-#define RCAR_GP_PIN(bank, pin) (((bank) * 32) + (pin))
-
-#endif /* __GPIO_RCAR_H__ */
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