| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <1997643.hzLDnYTZoH@vostro.rjw.lan>
Date: Tue, 07 Oct 2014 02:18:45 +0200
From: "Rafael J. Wysocki" <rjw@...ysocki.net>
To: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Bryan Wu <cooloney@...il.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Mika Westerberg <mika.westerberg@...ux.intel.com>,
ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
Aaron Lu <aaron.lu@...el.com>, devicetree@...r.kernel.org,
Linus Walleij <linus.walleij@...aro.org>,
Alexandre Courbot <gnurou@...il.com>,
Dmitry Torokhov <dmitry.torokhov@...il.com>,
Grant Likely <grant.likely@...aro.org>,
Arnd Bergmann <arnd@...db.de>,
Darren Hart <dvhart@...ux.intel.com>,
Mark Rutland <mark.rutland@....com>
Subject: [PATCH 12/13] leds: leds-gpio: Make use of device property API
From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Make use of device property API in this driver so that both OF and ACPI
based system can use the same driver.
This change contains material from Max Eliaser and Mika Westerberg.
Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
drivers/leds/leds-gpio.c | 67 +++++++++++++++++++++--------------------------
1 file changed, 30 insertions(+), 37 deletions(-)
Index: linux-pm/drivers/leds/leds-gpio.c
===================================================================
--- linux-pm.orig/drivers/leds/leds-gpio.c
+++ linux-pm/drivers/leds/leds-gpio.c
@@ -15,13 +15,11 @@
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/leds.h>
-#include <linux/of.h>
-#include <linux/of_platform.h>
-#include <linux/of_gpio.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/module.h>
#include <linux/err.h>
+#include <linux/property.h>
struct gpio_led_data {
struct led_classdev cdev;
@@ -171,40 +169,41 @@ static inline int sizeof_gpio_leds_priv(
(sizeof(struct gpio_led_data) * num_leds);
}
-/* Code to create from OpenFirmware platform devices */
-#ifdef CONFIG_OF_GPIO
-static struct gpio_leds_priv *gpio_leds_create_of(struct platform_device *pdev)
+static struct gpio_leds_priv *gpio_leds_create(struct platform_device *pdev)
{
- struct device_node *np = pdev->dev.of_node, *child;
+ struct device *dev = &pdev->dev;
struct gpio_leds_priv *priv;
int count, ret;
+ void *child;
- /* count LEDs in this device, so we know how much to allocate */
- count = of_get_available_child_count(np);
+ count = device_get_child_node_count(dev);
if (!count)
return ERR_PTR(-ENODEV);
- for_each_available_child_of_node(np, child)
- if (of_get_gpio(child, 0) == -EPROBE_DEFER)
- return ERR_PTR(-EPROBE_DEFER);
-
- priv = devm_kzalloc(&pdev->dev, sizeof_gpio_leds_priv(count),
- GFP_KERNEL);
+ priv = devm_kzalloc(dev, sizeof_gpio_leds_priv(count), GFP_KERNEL);
if (!priv)
return ERR_PTR(-ENOMEM);
- for_each_available_child_of_node(np, child) {
+ device_for_each_child_node(dev, child) {
struct gpio_led led = {};
- enum of_gpio_flags flags;
- const char *state;
+ const char *state = NULL;
+
+ led.gpiod = devm_get_named_gpiod_from_child(dev, child,
+ "gpios", 0);
+ if (IS_ERR(led.gpiod)) {
+ device_put_child_node(dev, child);
+ goto err;
+ }
- led.gpio = of_get_gpio_flags(child, 0, &flags);
- led.active_low = flags & OF_GPIO_ACTIVE_LOW;
- led.name = of_get_property(child, "label", NULL) ? : child->name;
- led.default_trigger =
- of_get_property(child, "linux,default-trigger", NULL);
- state = of_get_property(child, "default-state", NULL);
- if (state) {
+ device_child_property_read_string(dev, child,
+ "label", &led.name);
+ device_child_property_read_string(dev, child,
+ "linux,default-trigger",
+ &led.default_trigger);
+
+ if (!device_child_property_read_string(dev, child,
+ "linux,default_state",
+ &state)) {
if (!strcmp(state, "keep"))
led.default_state = LEDS_GPIO_DEFSTATE_KEEP;
else if (!strcmp(state, "on"))
@@ -213,13 +212,14 @@ static struct gpio_leds_priv *gpio_leds_
led.default_state = LEDS_GPIO_DEFSTATE_OFF;
}
- if (of_get_property(child, "retain-state-suspended", NULL))
+ if (!device_get_child_property(dev, child,
+ "retain-state-suspended", NULL))
led.retain_state_suspended = 1;
ret = create_gpio_led(&led, &priv->leds[priv->num_leds++],
- &pdev->dev, NULL);
+ dev, NULL);
if (ret < 0) {
- of_node_put(child);
+ device_put_child_node(dev, child);
goto err;
}
}
@@ -238,13 +238,6 @@ static const struct of_device_id of_gpio
};
MODULE_DEVICE_TABLE(of, of_gpio_leds_match);
-#else /* CONFIG_OF_GPIO */
-static struct gpio_leds_priv *gpio_leds_create_of(struct platform_device *pdev)
-{
- return ERR_PTR(-ENODEV);
-}
-#endif /* CONFIG_OF_GPIO */
-
static int gpio_led_probe(struct platform_device *pdev)
{
@@ -273,7 +266,7 @@ static int gpio_led_probe(struct platfor
}
}
} else {
- priv = gpio_leds_create_of(pdev);
+ priv = gpio_leds_create(pdev);
if (IS_ERR(priv))
return PTR_ERR(priv);
}
@@ -300,7 +293,7 @@ static struct platform_driver gpio_led_d
.driver = {
.name = "leds-gpio",
.owner = THIS_MODULE,
- .of_match_table = of_match_ptr(of_gpio_leds_match),
+ .of_match_table = of_gpio_leds_match,
},
};
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists