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Message-Id: <1424305990-17983-77-git-send-email-kamal@canonical.com>
Date: Wed, 18 Feb 2015 16:32:43 -0800
From: Kamal Mostafa <kamal@...onical.com>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org,
kernel-team@...ts.ubuntu.com
Cc: Mika Westerberg <mika.westerberg@...ux.intel.com>,
Linus Walleij <linus.walleij@...aro.org>,
Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.13.y-ckt 076/103] gpio / ACPI: register to ACPI events automatically
3.13.11-ckt16 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Mika Westerberg <mika.westerberg@...ux.intel.com>
commit 664e3e5ac64c8a1999e2d94bc307e5bcd17d3646 upstream.
Instead of asking each driver to register to ACPI events we can just call
acpi_gpiochip_register_interrupts() for each chip that has an ACPI handle.
The function checks chip->to_irq and if it is set to NULL (a GPIO driver
that doesn't do interrupts) the function does nothing.
We also add the a new header drivers/gpio/gpiolib.h that is used for
functions internal to gpiolib and add ACPI GPIO chip registering functions
to that header.
Once that is done we can remove call to acpi_gpiochip_register_interrupts()
from its only user, pinctrl-baytrail.c
Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
drivers/gpio/gpiolib-acpi.c | 16 ++++++++++++----
drivers/gpio/gpiolib.c | 4 ++++
drivers/gpio/gpiolib.h | 23 +++++++++++++++++++++++
drivers/pinctrl/pinctrl-baytrail.c | 4 ----
include/linux/acpi_gpio.h | 6 ------
5 files changed, 39 insertions(+), 14 deletions(-)
create mode 100644 drivers/gpio/gpiolib.h
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index ae0ffdc..cb2da66 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -94,7 +94,7 @@ static void acpi_gpio_evt_dh(acpi_handle handle, void *data)
* gpio pins have acpi event methods and assigns interrupt handlers that calls
* the acpi event methods for those pins.
*/
-void acpi_gpiochip_request_interrupts(struct gpio_chip *chip)
+static void acpi_gpiochip_request_interrupts(struct gpio_chip *chip)
{
struct acpi_buffer buf = {ACPI_ALLOCATE_BUFFER, NULL};
struct acpi_resource *res;
@@ -192,7 +192,6 @@ void acpi_gpiochip_request_interrupts(struct gpio_chip *chip)
irq);
}
}
-EXPORT_SYMBOL(acpi_gpiochip_request_interrupts);
/**
* acpi_gpiochip_free_interrupts() - Free GPIO _EVT ACPI event interrupts.
@@ -203,7 +202,7 @@ EXPORT_SYMBOL(acpi_gpiochip_request_interrupts);
* The remaining ACPI event interrupts associated with the chip are freed
* automatically.
*/
-void acpi_gpiochip_free_interrupts(struct gpio_chip *chip)
+static void acpi_gpiochip_free_interrupts(struct gpio_chip *chip)
{
acpi_handle handle;
acpi_status status;
@@ -230,7 +229,6 @@ void acpi_gpiochip_free_interrupts(struct gpio_chip *chip)
acpi_detach_data(handle, acpi_gpio_evt_dh);
kfree(evt_pins);
}
-EXPORT_SYMBOL(acpi_gpiochip_free_interrupts);
struct acpi_gpio_lookup {
struct acpi_gpio_info info;
@@ -310,3 +308,13 @@ struct gpio_desc *acpi_get_gpiod_by_index(struct device *dev, int index,
return lookup.desc ? lookup.desc : ERR_PTR(-ENODEV);
}
EXPORT_SYMBOL_GPL(acpi_get_gpiod_by_index);
+
+void acpi_gpiochip_add(struct gpio_chip *chip)
+{
+ acpi_gpiochip_request_interrupts(chip);
+}
+
+void acpi_gpiochip_remove(struct gpio_chip *chip)
+{
+ acpi_gpiochip_free_interrupts(chip);
+}
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 85f772c..95712ca 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -16,6 +16,8 @@
#include <linux/acpi.h>
#include <linux/gpio/driver.h>
+#include "gpiolib.h"
+
#define CREATE_TRACE_POINTS
#include <trace/events/gpio.h>
@@ -1213,6 +1215,7 @@ int gpiochip_add(struct gpio_chip *chip)
#endif
of_gpiochip_add(chip);
+ acpi_gpiochip_add(chip);
if (status)
goto fail;
@@ -1254,6 +1257,7 @@ int gpiochip_remove(struct gpio_chip *chip)
gpiochip_remove_pin_ranges(chip);
of_gpiochip_remove(chip);
+ acpi_gpiochip_remove(chip);
for (id = 0; id < chip->ngpio; id++) {
if (test_bit(FLAG_REQUESTED, &chip->desc[id].flags)) {
diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h
new file mode 100644
index 0000000..2ed23ab
--- /dev/null
+++ b/drivers/gpio/gpiolib.h
@@ -0,0 +1,23 @@
+/*
+ * Internal GPIO functions.
+ *
+ * Copyright (C) 2013, Intel Corporation
+ * Author: Mika Westerberg <mika.westerberg@...ux.intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef GPIOLIB_H
+#define GPIOLIB_H
+
+#ifdef CONFIG_ACPI
+void acpi_gpiochip_add(struct gpio_chip *chip);
+void acpi_gpiochip_remove(struct gpio_chip *chip);
+#else
+static inline void acpi_gpiochip_add(struct gpio_chip *chip) { }
+static inline void acpi_gpiochip_remove(struct gpio_chip *chip) { }
+#endif
+
+#endif /* GPIOLIB_H */
diff --git a/drivers/pinctrl/pinctrl-baytrail.c b/drivers/pinctrl/pinctrl-baytrail.c
index 2832576..98b87a5 100644
--- a/drivers/pinctrl/pinctrl-baytrail.c
+++ b/drivers/pinctrl/pinctrl-baytrail.c
@@ -29,7 +29,6 @@
#include <linux/gpio.h>
#include <linux/irqdomain.h>
#include <linux/acpi.h>
-#include <linux/acpi_gpio.h>
#include <linux/platform_device.h>
#include <linux/seq_file.h>
#include <linux/io.h>
@@ -485,9 +484,6 @@ static int byt_gpio_probe(struct platform_device *pdev)
irq_set_handler_data(hwirq, vg);
irq_set_chained_handler(hwirq, byt_gpio_irq_handler);
-
- /* Register interrupt handlers for gpio signaled acpi events */
- acpi_gpiochip_request_interrupts(gc);
}
pm_runtime_enable(dev);
diff --git a/include/linux/acpi_gpio.h b/include/linux/acpi_gpio.h
index d875bc3..af96a0d 100644
--- a/include/linux/acpi_gpio.h
+++ b/include/linux/acpi_gpio.h
@@ -21,9 +21,6 @@ struct acpi_gpio_info {
struct gpio_desc *acpi_get_gpiod_by_index(struct device *dev, int index,
struct acpi_gpio_info *info);
-void acpi_gpiochip_request_interrupts(struct gpio_chip *chip);
-void acpi_gpiochip_free_interrupts(struct gpio_chip *chip);
-
#else /* CONFIG_GPIO_ACPI */
static inline struct gpio_desc *
@@ -33,9 +30,6 @@ acpi_get_gpiod_by_index(struct device *dev, int index,
return ERR_PTR(-ENOSYS);
}
-static inline void acpi_gpiochip_request_interrupts(struct gpio_chip *chip) { }
-static inline void acpi_gpiochip_free_interrupts(struct gpio_chip *chip) { }
-
#endif /* CONFIG_GPIO_ACPI */
static inline int acpi_get_gpio_by_index(struct device *dev, int index,
--
1.9.1
--
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