Convert the GPIO driver to use the GPIO irqchip library
GPIOLIB_IRQCHIP instead of reimplementing the same.
Reviewed-by: Johan Hovold
Signed-off-by: Nishad Kamdar
---
Changes in v7:
- No change.
Changes in v5:
- Restore "struct irq_chip irqc" in "struct gb_gpio_controller"
This is because we cannot use the gpio-chip irqchip, as that
will register the irqchip automatically and possibly in an
incompatible way.
Changes in v4:
- Remove changes related to conversion to gpiochip_get_data() to
include it as a new patch.
- Remove the 'struct irq_chip' field from 'struct gb_gpio_controller'
as struct gpio_chip will have an irqchip whenever
CONFIG_GPIOLIB_IRQCHIP is selected.
- Update the TODO file as per the changes.
Changes in v3:
- Combine patches as into a patch series.
Changes in v2:
- Retained irq.h and irqdomain.h headers.
- Dropped function gb_gpio_irqchip_add() and
called gpiochip_irqchip_add() from probe().
- Referred
https://lkml.kernel.org/r/1476054589-28422-1-git-send-email-linus.wall...@linaro.org.
---
drivers/staging/greybus/Kconfig | 1 +
drivers/staging/greybus/TODO| 2 -
drivers/staging/greybus/gpio.c | 156 ++--
3 files changed, 11 insertions(+), 148 deletions(-)
diff --git a/drivers/staging/greybus/Kconfig b/drivers/staging/greybus/Kconfig
index ab096bcef98c..b571e4e8060b 100644
--- a/drivers/staging/greybus/Kconfig
+++ b/drivers/staging/greybus/Kconfig
@@ -148,6 +148,7 @@ if GREYBUS_BRIDGED_PHY
config GREYBUS_GPIO
tristate "Greybus GPIO Bridged PHY driver"
depends on GPIOLIB
+ select GPIOLIB_IRQCHIP
---help---
Select this option if you have a device that follows the
Greybus GPIO Bridged PHY Class specification.
diff --git a/drivers/staging/greybus/TODO b/drivers/staging/greybus/TODO
index 3b90a5711998..31f1f2cb401c 100644
--- a/drivers/staging/greybus/TODO
+++ b/drivers/staging/greybus/TODO
@@ -1,5 +1,3 @@
* Convert all uses of the old GPIO API from to the
GPIO descriptor API in and look up GPIO
lines from device tree or ACPI.
-* Convert the GPIO driver to use the GPIO irqchip library
- GPIOLIB_IRQCHIP instead of reimplementing the same.
diff --git a/drivers/staging/greybus/gpio.c b/drivers/staging/greybus/gpio.c
index e110681e6f86..3151004d26fb 100644
--- a/drivers/staging/greybus/gpio.c
+++ b/drivers/staging/greybus/gpio.c
@@ -9,9 +9,9 @@
#include
#include
#include
-#include
#include
#include
+#include
#include
#include "greybus.h"
@@ -39,11 +39,6 @@ struct gb_gpio_controller {
struct gpio_chipchip;
struct irq_chip irqc;
- struct irq_chip *irqchip;
- struct irq_domain *irqdomain;
- unsigned intirq_base;
- irq_flow_handler_t irq_handler;
- unsigned intirq_default_type;
struct mutexirq_lock;
};
#define gpio_chip_to_gb_gpio_controller(chip) \
@@ -391,7 +386,7 @@ static int gb_gpio_request_handler(struct gb_operation *op)
return -EINVAL;
}
- irq = irq_find_mapping(ggc->irqdomain, event->which);
+ irq = irq_find_mapping(ggc->chip.irq.domain, event->which);
if (!irq) {
dev_err(dev, "failed to find IRQ\n");
return -EINVAL;
@@ -506,135 +501,6 @@ static int gb_gpio_controller_setup(struct
gb_gpio_controller *ggc)
return ret;
}
-/**
- * gb_gpio_irq_map() - maps an IRQ into a GB gpio irqchip
- * @d: the irqdomain used by this irqchip
- * @irq: the global irq number used by this GB gpio irqchip irq
- * @hwirq: the local IRQ/GPIO line offset on this GB gpio
- *
- * This function will set up the mapping for a certain IRQ line on a
- * GB gpio by assigning the GB gpio as chip data, and using the irqchip
- * stored inside the GB gpio.
- */
-static int gb_gpio_irq_map(struct irq_domain *domain, unsigned int irq,
- irq_hw_number_t hwirq)
-{
- struct gpio_chip *chip = domain->host_data;
- struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip);
-
- irq_set_chip_data(irq, ggc);
- irq_set_chip_and_handler(irq, ggc->irqchip, ggc->irq_handler);
- irq_set_noprobe(irq);
- /*
-* No set-up of the hardware will happen if IRQ_TYPE_NONE
-* is passed as default type.
-*/
- if (ggc->irq_default_type != IRQ_TYPE_NONE)
- irq_set_irq_type(irq, ggc->irq_default_type);
-
- return 0;
-}
-
-static void gb_gpio_irq_unmap(struct irq_domain *d, unsigned int irq)
-{
- irq_set_chip_and_handler(irq, NULL, NULL);
- irq_set_chip_data(irq, NULL);
-}
-
-static const struct irq_domain_ops gb_gpio_domain_ops = {
- .map= gb_gpio_irq_map,
- .unmap = gb_gpio_irq_unmap,
-};
-
-/**
- * gb_gpio_irqchip_remove() - removes an irqchip added to a gb_gpio_controller
- * @ggc: the gb_gpio_controller to remove the irqchip from
- *
- * This i
