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gpio: generic: factor into gpio_chip struct

Forráskód böngészése 
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>
This commit is contained in:
Linus Walleij
2015-12-04 14:02:58 +01:00
szülő 3208b0f0c0
commit 0f4630f372
22 fájl változott, egészen pontosan 442 új sor hozzáadva és 552 régi sor törölve
Download Patch File Download Diff File Expand all files Collapse all files

92
drivers/gpio/gpio-dwapb.c
Fájl megtekintése

@@ -7,7 +7,9 @@
*
* All enquiries to support@picochip.com
*/
#include <linux/basic_mmio_gpio.h>
#include <linux/gpio/driver.h>
/* FIXME: for gpio_get_value(), replace this with direct register read */
#include <linux/gpio.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/interrupt.h>
@@ -66,7 +68,7 @@ struct dwapb_context {
#endif
struct dwapb_gpio_port {
struct bgpio_chip bgc;
struct gpio_chip gc;
bool is_registered;
struct dwapb_gpio *gpio;
#ifdef CONFIG_PM_SLEEP
@@ -83,33 +85,26 @@ struct dwapb_gpio {
struct irq_domain *domain;
};
static inline struct dwapb_gpio_port *
to_dwapb_gpio_port(struct bgpio_chip *bgc)
{
return container_of(bgc, struct dwapb_gpio_port, bgc);
}
static inline u32 dwapb_read(struct dwapb_gpio *gpio, unsigned int offset)
{
struct bgpio_chip *bgc = &gpio->ports[0].bgc;
struct gpio_chip *gc = &gpio->ports[0].gc;
void __iomem *reg_base = gpio->regs;
return bgc->read_reg(reg_base + offset);
return gc->read_reg(reg_base + offset);
}
static inline void dwapb_write(struct dwapb_gpio *gpio, unsigned int offset,
u32 val)
{
struct bgpio_chip *bgc = &gpio->ports[0].bgc;
struct gpio_chip *gc = &gpio->ports[0].gc;
void __iomem *reg_base = gpio->regs;
bgc->write_reg(reg_base + offset, val);
gc->write_reg(reg_base + offset, val);
}
static int dwapb_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
{
struct bgpio_chip *bgc = to_bgpio_chip(gc);
struct dwapb_gpio_port *port = to_dwapb_gpio_port(bgc);
struct dwapb_gpio_port *port = gpiochip_get_data(gc);
struct dwapb_gpio *gpio = port->gpio;
return irq_find_mapping(gpio->domain, offset);
@@ -119,7 +114,7 @@ static void dwapb_toggle_trigger(struct dwapb_gpio *gpio, unsigned int offs)
{
u32 v = dwapb_read(gpio, GPIO_INT_POLARITY);
if (gpio_get_value(gpio->ports[0].bgc.gc.base + offs))
if (gpio_get_value(gpio->ports[0].gc.base + offs))
v &= ~BIT(offs);
else
v |= BIT(offs);
@@ -162,39 +157,39 @@ static void dwapb_irq_enable(struct irq_data *d)
{
struct irq_chip_generic *igc = irq_data_get_irq_chip_data(d);
struct dwapb_gpio *gpio = igc->private;
struct bgpio_chip *bgc = &gpio->ports[0].bgc;
struct gpio_chip *gc = &gpio->ports[0].gc;
unsigned long flags;
u32 val;
spin_lock_irqsave(&bgc->lock, flags);
spin_lock_irqsave(&gc->bgpio_lock, flags);
val = dwapb_read(gpio, GPIO_INTEN);
val |= BIT(d->hwirq);
dwapb_write(gpio, GPIO_INTEN, val);
spin_unlock_irqrestore(&bgc->lock, flags);
spin_unlock_irqrestore(&gc->bgpio_lock, flags);
}
static void dwapb_irq_disable(struct irq_data *d)
{
struct irq_chip_generic *igc = irq_data_get_irq_chip_data(d);
struct dwapb_gpio *gpio = igc->private;
struct bgpio_chip *bgc = &gpio->ports[0].bgc;
struct gpio_chip *gc = &gpio->ports[0].gc;
unsigned long flags;
u32 val;
spin_lock_irqsave(&bgc->lock, flags);
spin_lock_irqsave(&gc->bgpio_lock, flags);
val = dwapb_read(gpio, GPIO_INTEN);
val &= ~BIT(d->hwirq);
dwapb_write(gpio, GPIO_INTEN, val);
spin_unlock_irqrestore(&bgc->lock, flags);
spin_unlock_irqrestore(&gc->bgpio_lock, flags);
}
static int dwapb_irq_reqres(struct irq_data *d)
{
struct irq_chip_generic *igc = irq_data_get_irq_chip_data(d);
struct dwapb_gpio *gpio = igc->private;
struct bgpio_chip *bgc = &gpio->ports[0].bgc;
struct gpio_chip *gc = &gpio->ports[0].gc;
if (gpiochip_lock_as_irq(&bgc->gc, irqd_to_hwirq(d))) {
if (gpiochip_lock_as_irq(gc, irqd_to_hwirq(d))) {
dev_err(gpio->dev, "unable to lock HW IRQ %lu for IRQ\n",
irqd_to_hwirq(d));
return -EINVAL;
@@ -206,16 +201,16 @@ static void dwapb_irq_relres(struct irq_data *d)
{
struct irq_chip_generic *igc = irq_data_get_irq_chip_data(d);
struct dwapb_gpio *gpio = igc->private;
struct bgpio_chip *bgc = &gpio->ports[0].bgc;
struct gpio_chip *gc = &gpio->ports[0].gc;
gpiochip_unlock_as_irq(&bgc->gc, irqd_to_hwirq(d));
gpiochip_unlock_as_irq(gc, irqd_to_hwirq(d));
}
static int dwapb_irq_set_type(struct irq_data *d, u32 type)
{
struct irq_chip_generic *igc = irq_data_get_irq_chip_data(d);
struct dwapb_gpio *gpio = igc->private;
struct bgpio_chip *bgc = &gpio->ports[0].bgc;
struct gpio_chip *gc = &gpio->ports[0].gc;
int bit = d->hwirq;
unsigned long level, polarity, flags;
@@ -223,7 +218,7 @@ static int dwapb_irq_set_type(struct irq_data *d, u32 type)
IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW))
return -EINVAL;
spin_lock_irqsave(&bgc->lock, flags);
spin_lock_irqsave(&gc->bgpio_lock, flags);
level = dwapb_read(gpio, GPIO_INTTYPE_LEVEL);
polarity = dwapb_read(gpio, GPIO_INT_POLARITY);
@@ -254,7 +249,7 @@ static int dwapb_irq_set_type(struct irq_data *d, u32 type)
dwapb_write(gpio, GPIO_INTTYPE_LEVEL, level);
dwapb_write(gpio, GPIO_INT_POLARITY, polarity);
spin_unlock_irqrestore(&bgc->lock, flags);
spin_unlock_irqrestore(&gc->bgpio_lock, flags);
return 0;
}
@@ -262,13 +257,12 @@ static int dwapb_irq_set_type(struct irq_data *d, u32 type)
static int dwapb_gpio_set_debounce(struct gpio_chip *gc,
unsigned offset, unsigned debounce)
{
struct bgpio_chip *bgc = to_bgpio_chip(gc);
struct dwapb_gpio_port *port = to_dwapb_gpio_port(bgc);
struct dwapb_gpio_port *port = gpiochip_get_data(gc);
struct dwapb_gpio *gpio = port->gpio;
unsigned long flags, val_deb;
unsigned long mask = bgc->pin2mask(bgc, offset);
unsigned long mask = gc->pin2mask(gc, offset);
spin_lock_irqsave(&bgc->lock, flags);
spin_lock_irqsave(&gc->bgpio_lock, flags);
val_deb = dwapb_read(gpio, GPIO_PORTA_DEBOUNCE);
if (debounce)
@@ -276,7 +270,7 @@ static int dwapb_gpio_set_debounce(struct gpio_chip *gc,
else
dwapb_write(gpio, GPIO_PORTA_DEBOUNCE, val_deb & ~mask);
spin_unlock_irqrestore(&bgc->lock, flags);
spin_unlock_irqrestore(&gc->bgpio_lock, flags);
return 0;
}
@@ -295,7 +289,7 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio,
struct dwapb_gpio_port *port,
struct dwapb_port_property *pp)
{
struct gpio_chip *gc = &port->bgc.gc;
struct gpio_chip *gc = &port->gc;
struct device_node *node = pp->node;
struct irq_chip_generic *irq_gc = NULL;
unsigned int hwirq, ngpio = gc->ngpio;
@@ -369,13 +363,13 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio,
for (hwirq = 0 ; hwirq < ngpio ; hwirq++)
irq_create_mapping(gpio->domain, hwirq);
port->bgc.gc.to_irq = dwapb_gpio_to_irq;
port->gc.to_irq = dwapb_gpio_to_irq;
}
static void dwapb_irq_teardown(struct dwapb_gpio *gpio)
{
struct dwapb_gpio_port *port = &gpio->ports[0];
struct gpio_chip *gc = &port->bgc.gc;
struct gpio_chip *gc = &port->gc;
unsigned int ngpio = gc->ngpio;
irq_hw_number_t hwirq;
@@ -412,7 +406,7 @@ static int dwapb_gpio_add_port(struct dwapb_gpio *gpio,
dirout = gpio->regs + GPIO_SWPORTA_DDR +
(pp->idx * GPIO_SWPORT_DDR_SIZE);
err = bgpio_init(&port->bgc, gpio->dev, 4, dat, set, NULL, dirout,
err = bgpio_init(&port->gc, gpio->dev, 4, dat, set, NULL, dirout,
NULL, false);
if (err) {
dev_err(gpio->dev, "failed to init gpio chip for %s\n",
@@ -421,19 +415,19 @@ static int dwapb_gpio_add_port(struct dwapb_gpio *gpio,
}
#ifdef CONFIG_OF_GPIO
port->bgc.gc.of_node = pp->node;
port->gc.of_node = pp->node;
#endif
port->bgc.gc.ngpio = pp->ngpio;
port->bgc.gc.base = pp->gpio_base;
port->gc.ngpio = pp->ngpio;
port->gc.base = pp->gpio_base;
/* Only port A support debounce */
if (pp->idx == 0)
port->bgc.gc.set_debounce = dwapb_gpio_set_debounce;
port->gc.set_debounce = dwapb_gpio_set_debounce;
if (pp->irq)
dwapb_configure_irqs(gpio, port, pp);
err = gpiochip_add(&port->bgc.gc);
err = gpiochip_add_data(&port->gc, port);
if (err)
dev_err(gpio->dev, "failed to register gpiochip for %s\n",
pp->name);
@@ -449,7 +443,7 @@ static void dwapb_gpio_unregister(struct dwapb_gpio *gpio)
for (m = 0; m < gpio->nr_ports; ++m)
if (gpio->ports[m].is_registered)
gpiochip_remove(&gpio->ports[m].bgc.gc);
gpiochip_remove(&gpio->ports[m].gc);
}
static struct dwapb_platform_data *
@@ -591,11 +585,11 @@ static int dwapb_gpio_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct dwapb_gpio *gpio = platform_get_drvdata(pdev);
struct bgpio_chip *bgc = &gpio->ports[0].bgc;
struct gpio_chip *gc = &gpio->ports[0].gc;
unsigned long flags;
int i;
spin_lock_irqsave(&bgc->lock, flags);
spin_lock_irqsave(&gc->bgpio_lock, flags);
for (i = 0; i < gpio->nr_ports; i++) {
unsigned int offset;
unsigned int idx = gpio->ports[i].idx;
@@ -624,7 +618,7 @@ static int dwapb_gpio_suspend(struct device *dev)
dwapb_write(gpio, GPIO_INTMASK, 0xffffffff);
}
}
spin_unlock_irqrestore(&bgc->lock, flags);
spin_unlock_irqrestore(&gc->bgpio_lock, flags);
return 0;
}
@@ -633,11 +627,11 @@ static int dwapb_gpio_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct dwapb_gpio *gpio = platform_get_drvdata(pdev);
struct bgpio_chip *bgc = &gpio->ports[0].bgc;
struct gpio_chip *gc = &gpio->ports[0].gc;
unsigned long flags;
int i;
spin_lock_irqsave(&bgc->lock, flags);
spin_lock_irqsave(&gc->bgpio_lock, flags);
for (i = 0; i < gpio->nr_ports; i++) {
unsigned int offset;
unsigned int idx = gpio->ports[i].idx;
@@ -666,7 +660,7 @@ static int dwapb_gpio_resume(struct device *dev)
dwapb_write(gpio, GPIO_PORTA_EOI, 0xffffffff);
}
}
spin_unlock_irqrestore(&bgc->lock, flags);
spin_unlock_irqrestore(&gc->bgpio_lock, flags);
return 0;
}