[adm5120] add LEDs trigger for switch port states, thanks to Bernhard Held (closes: #2153)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9362 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/kernel/modules/other.mk

@@ -279,12 +279,29 @@ define KernelPackage/leds-adm5120
 endef
 
 define KernelPackage/leds-adm5120/description
- Kernel module for LEDs on ADM5120 based boards
+ Kernel module for LEDs on ADM5120 based boards.
 endef
 
 $(eval $(call KernelPackage,leds-adm5120))
 
 
+define KernelPackage/ledtrig-adm5120-switch
+  SUBMENU:=$(OTHER_MENU)
+  TITLE:=LED ADM5120 Switch Port Status Trigger
+  DEPENDS:=@TARGET_adm5120
+  KCONFIG:=CONFIG_LEDS_TRIGGER_ADM5120_SWITCH
+  FILES:=$(LINUX_DIR)/drivers/leds/ledtrig-adm5120-switch.$(LINUX_KMOD_SUFFIX)
+  AUTOLOAD:=$(call AutoLoad,50,ledtrig-adm5120-switch)
+endef
+
+define KernelPackage/ledtrig-adm5120-switch/description
+ Kernel module to allow LEDs to be controlled by the port states
+ of the ADM5120 built-in ethernet switch.
+endef
+
+$(eval $(call KernelPackage,ledtrig-adm5120-switch))
+
+
 define KernelPackage/leds-net48xx
   SUBMENU:=$(OTHER_MENU)
   TITLE:=Soekris Net48xx LED support

target/linux/adm5120/files/drivers/leds/ledtrig-adm5120-switch.c

@@ -0,0 +1,149 @@
+/*
+ * LED ADM5120 Switch Port State Trigger
+ *
+ * Copyright (C) 2007 Bernhard Held <bernhard at bernhardheld.de>
+ * Copyright (C) 2007 Gabor Juhos <juhosg at openwrt.org>
+ *
+ * This file was based on: drivers/leds/ledtrig-timer.c
+ *	Copyright 2005-2006 Openedhand Ltd.
+ *	Author: Richard Purdie
+ *
+ * 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.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+
+#include <asm/gpio.h>
+
+#include "leds.h"
+
+#define DRV_NAME "port_state"
+#define DRV_DESC "LED ADM5120 Switch Port State Trigger"
+
+struct port_state {
+	char *name;
+	unsigned int value;
+};
+
+#define PORT_STATE(n,v) {.name = (n), .value = (v)}
+
+static struct port_state port_states[] = {
+	PORT_STATE("off",		LED_OFF),
+	PORT_STATE("on",		LED_FULL),
+	PORT_STATE("flash",		ADM5120_GPIO_FLASH),
+	PORT_STATE("link",		ADM5120_GPIO_LINK),
+	PORT_STATE("speed",		ADM5120_GPIO_SPEED),
+	PORT_STATE("duplex",		ADM5120_GPIO_DUPLEX),
+	PORT_STATE("act",		ADM5120_GPIO_ACT),
+	PORT_STATE("coll",		ADM5120_GPIO_COLL),
+	PORT_STATE("link_act",		ADM5120_GPIO_LINK_ACT),
+	PORT_STATE("duplex_coll",	ADM5120_GPIO_DUPLEX_COLL),
+	PORT_STATE("10M_act",		ADM5120_GPIO_10M_ACT),
+	PORT_STATE("100M_act",		ADM5120_GPIO_100M_ACT),
+};
+
+static ssize_t led_port_state_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct led_classdev *led_cdev = dev_get_drvdata(dev);
+	struct port_state *state = led_cdev->trigger_data;
+	int len = 0;
+	int i;
+
+	*buf = '\0';
+	for (i = 0; i < ARRAY_SIZE(port_states); i++) {
+		if (&port_states[i] == state)
+			len += sprintf(buf+len, "[%s] ", port_states[i].name);
+		else
+			len += sprintf(buf+len, "%s ", port_states[i].name);
+	}
+	len += sprintf(buf+len, "\n");
+
+	return len;
+}
+
+static ssize_t led_port_state_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t size)
+{
+	struct led_classdev *led_cdev = dev_get_drvdata(dev);
+	size_t len;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(port_states); i++) {
+		len = strlen(port_states[i].name);
+		if (strncmp(port_states[i].name, buf, len) != 0)
+			continue;
+
+		if (buf[len] != '\0' && buf[len] != '\n')
+			continue;
+
+		led_cdev->trigger_data = &port_states[i];
+		led_set_brightness(led_cdev, port_states[i].value);
+		return size;
+	}
+
+	return -EINVAL;
+}
+
+static DEVICE_ATTR(port_state, 0644, led_port_state_show,
+			 led_port_state_store);
+
+static void adm5120_switch_trig_activate(struct led_classdev *led_cdev)
+{
+	struct port_state *state = port_states;
+	int rc;
+
+	led_cdev->trigger_data = state;
+
+	rc = device_create_file(led_cdev->dev, &dev_attr_port_state);
+	if (rc)
+		goto err;
+
+	led_set_brightness(led_cdev, state->value);
+
+	return;
+err:
+	led_cdev->trigger_data = NULL;
+}
+
+static void adm5120_switch_trig_deactivate(struct led_classdev *led_cdev)
+{
+	struct port_state *state = led_cdev->trigger_data;
+
+	if (!state)
+		return;
+
+	device_remove_file(led_cdev->dev, &dev_attr_port_state);
+
+}
+
+static struct led_trigger adm5120_switch_led_trigger = {
+	.name		= DRV_NAME,
+	.activate	= adm5120_switch_trig_activate,
+	.deactivate	= adm5120_switch_trig_deactivate,
+};
+
+static int __init adm5120_switch_trig_init(void)
+{
+	led_trigger_register(&adm5120_switch_led_trigger);
+	return 0;
+}
+
+static void __exit adm5120_switch_trig_exit(void)
+{
+	led_trigger_unregister(&adm5120_switch_led_trigger);
+}
+
+module_init(adm5120_switch_trig_init);
+module_exit(adm5120_switch_trig_exit);
+
+MODULE_AUTHOR("Bernhard Held <bernhard at bernhardheld.de>, "
+		"Gabor Juhos <juhosg at openwrt.org>");
+MODULE_DESCRIPTION(DRV_DESC);
+MODULE_LICENSE("GPL");

target/linux/adm5120/patches-2.6.23/009-adm5120_leds_switch_trigger.patch

@@ -0,0 +1,26 @@
+Index: linux-2.6.23/drivers/leds/Kconfig
+===================================================================
+--- linux-2.6.23.orig/drivers/leds/Kconfig
++++ linux-2.6.23/drivers/leds/Kconfig
+@@ -152,4 +152,12 @@ config LEDS_TRIGGER_MORSE
+ 	tristate "LED Morse Trigger"
+ 	depends on LEDS_TRIGGERS
+ 
++config LEDS_TRIGGER_ADM5120_SWITCH
++	tristate "LED ADM5120 Switch Port Status Trigger"
++	depends on LEDS_TRIGGERS && LEDS_ADM5120
++	help
++	  This allows LEDs to be controlled by the port states of
++	  the ADM5120 built-in Ethernet Switch
++	  If unsure, say N.
++
+ endif # NEW_LEDS
+Index: linux-2.6.23/drivers/leds/Makefile
+===================================================================
+--- linux-2.6.23.orig/drivers/leds/Makefile
++++ linux-2.6.23/drivers/leds/Makefile
+@@ -24,3 +24,4 @@ obj-$(CONFIG_LEDS_TRIGGER_TIMER)	+= ledt
+ obj-$(CONFIG_LEDS_TRIGGER_IDE_DISK)	+= ledtrig-ide-disk.o
+ obj-$(CONFIG_LEDS_TRIGGER_HEARTBEAT)	+= ledtrig-heartbeat.o
+ obj-$(CONFIG_LEDS_TRIGGER_MORSE)	+= ledtrig-morse.o
++obj-$(CONFIG_LEDS_TRIGGER_ADM5120_SWITCH) += ledtrig-adm5120-switch.o

target/linux/adm5120/router_be/config-2.6.23

@@ -92,6 +92,7 @@ CONFIG_LEDS_ADM5120=m
 CONFIG_LEDS_ADM5120_DIAG=y
 # CONFIG_LEDS_ADM5120_EXPERIMENTAL is not set
 CONFIG_LEDS_GPIO=m
+CONFIG_LEDS_TRIGGER_ADM5120_SWITCH=m
 CONFIG_LEGACY_PTYS=y
 CONFIG_LEGACY_PTY_COUNT=256
 # CONFIG_LEMOTE_FULONG is not set

target/linux/adm5120/router_le/config-2.6.23

@@ -92,6 +92,7 @@ CONFIG_LEDS_ADM5120=m
 CONFIG_LEDS_ADM5120_DIAG=y
 # CONFIG_LEDS_ADM5120_EXPERIMENTAL is not set
 CONFIG_LEDS_GPIO=m
+CONFIG_LEDS_TRIGGER_ADM5120_SWITCH=m
 CONFIG_LEGACY_PTYS=y
 CONFIG_LEGACY_PTY_COUNT=256
 # CONFIG_LEMOTE_FULONG is not set