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>
diff --git a/drivers/gpio/gpio-etraxfs.c b/drivers/gpio/gpio-etraxfs.c
index 5c15dd1..00b022c 100644
--- a/drivers/gpio/gpio-etraxfs.c
+++ b/drivers/gpio/gpio-etraxfs.c
@@ -1,12 +1,10 @@
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/gpio.h>
#include <linux/gpio/driver.h>
#include <linux/of_gpio.h>
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
-#include <linux/basic_mmio_gpio.h>
#define ETRAX_FS_rw_pa_dout 0
#define ETRAX_FS_r_pa_din 4
@@ -67,7 +65,7 @@
};
struct etraxfs_gpio_chip {
- struct bgpio_chip bgc;
+ struct gpio_chip gc;
struct etraxfs_gpio_block *block;
};
@@ -176,11 +174,6 @@
.rw_intr_pins = ARTPEC3_rw_intr_pins,
};
-static struct etraxfs_gpio_chip *to_etraxfs(struct gpio_chip *gc)
-{
- return container_of(gc, struct etraxfs_gpio_chip, bgc.gc);
-}
-
static unsigned int etraxfs_gpio_chip_to_port(struct gpio_chip *gc)
{
return gc->label[0] - 'A';
@@ -220,13 +213,13 @@
static unsigned int etraxfs_gpio_to_group_pin(struct etraxfs_gpio_chip *chip,
unsigned int gpio)
{
- return 4 * etraxfs_gpio_chip_to_port(&chip->bgc.gc) + gpio / 8;
+ return 4 * etraxfs_gpio_chip_to_port(&chip->gc) + gpio / 8;
}
static void etraxfs_gpio_irq_ack(struct irq_data *d)
{
struct etraxfs_gpio_chip *chip =
- to_etraxfs(irq_data_get_irq_chip_data(d));
+ gpiochip_get_data(irq_data_get_irq_chip_data(d));
struct etraxfs_gpio_block *block = chip->block;
unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq);
@@ -236,7 +229,7 @@
static void etraxfs_gpio_irq_mask(struct irq_data *d)
{
struct etraxfs_gpio_chip *chip =
- to_etraxfs(irq_data_get_irq_chip_data(d));
+ gpiochip_get_data(irq_data_get_irq_chip_data(d));
struct etraxfs_gpio_block *block = chip->block;
unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq);
@@ -249,7 +242,7 @@
static void etraxfs_gpio_irq_unmask(struct irq_data *d)
{
struct etraxfs_gpio_chip *chip =
- to_etraxfs(irq_data_get_irq_chip_data(d));
+ gpiochip_get_data(irq_data_get_irq_chip_data(d));
struct etraxfs_gpio_block *block = chip->block;
unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq);
@@ -262,7 +255,7 @@
static int etraxfs_gpio_irq_set_type(struct irq_data *d, u32 type)
{
struct etraxfs_gpio_chip *chip =
- to_etraxfs(irq_data_get_irq_chip_data(d));
+ gpiochip_get_data(irq_data_get_irq_chip_data(d));
struct etraxfs_gpio_block *block = chip->block;
unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq);
u32 cfg;
@@ -299,7 +292,7 @@
static int etraxfs_gpio_irq_request_resources(struct irq_data *d)
{
struct etraxfs_gpio_chip *chip =
- to_etraxfs(irq_data_get_irq_chip_data(d));
+ gpiochip_get_data(irq_data_get_irq_chip_data(d));
struct etraxfs_gpio_block *block = chip->block;
unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq);
int ret = -EBUSY;
@@ -308,7 +301,7 @@
if (block->group[grpirq])
goto out;
- ret = gpiochip_lock_as_irq(&chip->bgc.gc, d->hwirq);
+ ret = gpiochip_lock_as_irq(&chip->gc, d->hwirq);
if (ret)
goto out;
@@ -330,13 +323,13 @@
static void etraxfs_gpio_irq_release_resources(struct irq_data *d)
{
struct etraxfs_gpio_chip *chip =
- to_etraxfs(irq_data_get_irq_chip_data(d));
+ gpiochip_get_data(irq_data_get_irq_chip_data(d));
struct etraxfs_gpio_block *block = chip->block;
unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq);
spin_lock(&block->lock);
block->group[grpirq] = 0;
- gpiochip_unlock_as_irq(&chip->bgc.gc, d->hwirq);
+ gpiochip_unlock_as_irq(&chip->gc, d->hwirq);
spin_unlock(&block->lock);
}
@@ -419,7 +412,7 @@
for (i = 0; i < info->num_ports; i++) {
struct etraxfs_gpio_chip *chip = &chips[i];
- struct bgpio_chip *bgc = &chip->bgc;
+ struct gpio_chip *gc = &chip->gc;
const struct etraxfs_gpio_port *port = &info->ports[i];
unsigned long flags = BGPIOF_READ_OUTPUT_REG_SET;
void __iomem *dat = regs + port->din;
@@ -433,7 +426,7 @@
flags = BGPIOF_NO_OUTPUT;
}
- ret = bgpio_init(bgc, dev, 4,
+ ret = bgpio_init(gc, dev, 4,
dat, set, NULL, dirout, NULL,
flags);
if (ret) {
@@ -442,28 +435,28 @@
continue;
}
- bgc->gc.ngpio = port->ngpio;
- bgc->gc.label = port->label;
+ gc->ngpio = port->ngpio;
+ gc->label = port->label;
- bgc->gc.of_node = dev->of_node;
- bgc->gc.of_gpio_n_cells = 3;
- bgc->gc.of_xlate = etraxfs_gpio_of_xlate;
+ gc->of_node = dev->of_node;
+ gc->of_gpio_n_cells = 3;
+ gc->of_xlate = etraxfs_gpio_of_xlate;
- ret = gpiochip_add(&bgc->gc);
+ ret = gpiochip_add_data(gc, chip);
if (ret) {
dev_err(dev, "Unable to register port %s\n",
- bgc->gc.label);
+ gc->label);
continue;
}
if (i > 0 && !allportsirq)
continue;
- ret = gpiochip_irqchip_add(&bgc->gc, &etraxfs_gpio_irq_chip, 0,
+ ret = gpiochip_irqchip_add(gc, &etraxfs_gpio_irq_chip, 0,
handle_level_irq, IRQ_TYPE_NONE);
if (ret) {
dev_err(dev, "Unable to add irqchip to port %s\n",
- bgc->gc.label);
+ gc->label);
}
}