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-mxs.c b/drivers/gpio/gpio-mxs.c
index a4288f4..b9daa0b 100644
--- a/drivers/gpio/gpio-mxs.c
+++ b/drivers/gpio/gpio-mxs.c
@@ -26,13 +26,14 @@
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
-#include <linux/gpio.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
-#include <linux/basic_mmio_gpio.h>
+#include <linux/gpio/driver.h>
+/* FIXME: for gpio_get_value(), replace this by direct register read */
+#include <linux/gpio.h>
#include <linux/module.h>
#define MXS_SET 0x4
@@ -64,7 +65,7 @@
int id;
int irq;
struct irq_domain *domain;
- struct bgpio_chip bgc;
+ struct gpio_chip gc;
enum mxs_gpio_id devid;
u32 both_edges;
};
@@ -93,7 +94,7 @@
port->both_edges &= ~pin_mask;
switch (type) {
case IRQ_TYPE_EDGE_BOTH:
- val = gpio_get_value(port->bgc.gc.base + d->hwirq);
+ val = gpio_get_value(port->gc.base + d->hwirq);
if (val)
edge = GPIO_INT_FALL_EDGE;
else
@@ -225,18 +226,14 @@
static int mxs_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
{
- struct bgpio_chip *bgc = to_bgpio_chip(gc);
- struct mxs_gpio_port *port =
- container_of(bgc, struct mxs_gpio_port, bgc);
+ struct mxs_gpio_port *port = gpiochip_get_data(gc);
return irq_find_mapping(port->domain, offset);
}
static int mxs_gpio_get_direction(struct gpio_chip *gc, unsigned offset)
{
- struct bgpio_chip *bgc = to_bgpio_chip(gc);
- struct mxs_gpio_port *port =
- container_of(bgc, struct mxs_gpio_port, bgc);
+ struct mxs_gpio_port *port = gpiochip_get_data(gc);
u32 mask = 1 << offset;
u32 dir;
@@ -330,26 +327,24 @@
irq_set_chained_handler_and_data(port->irq, mxs_gpio_irq_handler,
port);
- err = bgpio_init(&port->bgc, &pdev->dev, 4,
+ err = bgpio_init(&port->gc, &pdev->dev, 4,
port->base + PINCTRL_DIN(port),
port->base + PINCTRL_DOUT(port) + MXS_SET,
port->base + PINCTRL_DOUT(port) + MXS_CLR,
port->base + PINCTRL_DOE(port), NULL, 0);
if (err)
- goto out_irqdesc_free;
+ goto out_irqdomain_remove;
- port->bgc.gc.to_irq = mxs_gpio_to_irq;
- port->bgc.gc.get_direction = mxs_gpio_get_direction;
- port->bgc.gc.base = port->id * 32;
+ port->gc.to_irq = mxs_gpio_to_irq;
+ port->gc.get_direction = mxs_gpio_get_direction;
+ port->gc.base = port->id * 32;
- err = gpiochip_add(&port->bgc.gc);
+ err = gpiochip_add_data(&port->gc, port);
if (err)
- goto out_bgpio_remove;
+ goto out_irqdomain_remove;
return 0;
-out_bgpio_remove:
- bgpio_remove(&port->bgc);
out_irqdomain_remove:
irq_domain_remove(port->domain);
out_irqdesc_free: