[PATCH] leds: Amstrad Delta LED support

Use the new LED infrastructure to support the 6 LEDs present on the Amstrad
Delta.

[akpm@osdl.org: cleanup]
Signed-off-by: Jonathan McDowell <noodles@earth.li>
Ackde-by: Richard Purdie <rpurdie@rpsys.net>
Cc: Ben Dooks <ben@fluff.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

4 files changed, 180 insertions, 0 deletions

diff --git a/arch/arm/mach-omap1/board-ams-delta.c b/arch/arm/mach-omap1/board-ams-delta.c
index 6178f046f128..73df32aac4c4 100644
--- a/arch/arm/mach-omap1/board-ams-delta.c
+++ b/arch/arm/mach-omap1/board-ams-delta.c
@@ -84,6 +84,15 @@ static struct omap_board_config_kernel ams_delta_config[] = {
         { OMAP_TAG_UART,        &ams_delta_uart_config },
 };
 
+static struct platform_device ams_delta_led_device = {
+        .name   = "ams-delta-led",
+        .id     = -1
+};
+
+static struct platform_device *ams_delta_devices[] __initdata = {
+        &ams_delta_led_device,
+};
+
 static void __init ams_delta_init(void)
 {
         iotable_init(ams_delta_io_desc, ARRAY_SIZE(ams_delta_io_desc));
@@ -94,6 +103,8 @@ static void __init ams_delta_init(void)
 
         /* Clear latch2 (NAND, LCD, modem enable) */
         ams_delta_latch2_write(~0, 0);
+
+        platform_add_devices(ams_delta_devices, ARRAY_SIZE(ams_delta_devices));
 }
 
 static void __init ams_delta_map_io(void)
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 626506234b76..f573d5af0b1f 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -63,6 +63,12 @@ config LEDS_S3C24XX
           This option enables support for LEDs connected to GPIO lines
           on Samsung S3C24XX series CPUs, such as the S3C2410 and S3C2440.
 
+config LEDS_AMS_DELTA
+        tristate "LED Support for the Amstrad Delta (E3)"
+        depends LEDS_CLASS && MACH_AMS_DELTA
+        help
+          This option enables support for the LEDs on Amstrad Delta (E3).
+
 comment "LED Triggers"
 
 config LEDS_TRIGGERS
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index 40f042633bf5..dcea1001faa4 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -11,6 +11,7 @@ obj-$(CONFIG_LEDS_SPITZ)		+= leds-spitz.o
 obj-$(CONFIG_LEDS_IXP4XX)               += leds-ixp4xx-gpio.o
 obj-$(CONFIG_LEDS_TOSA)                 += leds-tosa.o
 obj-$(CONFIG_LEDS_S3C24XX)              += leds-s3c24xx.o
+obj-$(CONFIG_LEDS_AMS_DELTA)            += leds-ams-delta.o
 
 # LED Triggers
 obj-$(CONFIG_LEDS_TRIGGER_TIMER)        += ledtrig-timer.o
diff --git a/drivers/leds/leds-ams-delta.c b/drivers/leds/leds-ams-delta.c
new file mode 100644
index 000000000000..e9f06116c4d7
--- /dev/null
+++ b/drivers/leds/leds-ams-delta.c
@@ -0,0 +1,162 @@
+/*
+ * LEDs driver for Amstrad Delta (E3)
+ *
+ * Copyright (C) 2006 Jonathan McDowell <noodles@earth.li>
+ *
+ * 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/config.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <asm/arch/board-ams-delta.h>
+
+/*
+ * Our context
+ */
+struct ams_delta_led {
+        struct led_classdev     cdev;
+        u8                      bitmask;
+};
+
+static void ams_delta_led_set(struct led_classdev *led_cdev,
+                enum led_brightness value)
+{
+        struct ams_delta_led *led_dev =
+                container_of(led_cdev, struct ams_delta_led, cdev);
+
+        if (value)
+                ams_delta_latch1_write(led_dev->bitmask, led_dev->bitmask);
+        else
+                ams_delta_latch1_write(led_dev->bitmask, 0);
+}
+
+static struct ams_delta_led ams_delta_leds[] = {
+        {
+                .cdev           = {
+                        .name           = "ams-delta:camera",
+                        .brightness_set = ams_delta_led_set,
+                },
+                .bitmask        = AMS_DELTA_LATCH1_LED_CAMERA,
+        },
+        {
+                .cdev           = {
+                        .name           = "ams-delta:advert",
+                        .brightness_set = ams_delta_led_set,
+                },
+                .bitmask        = AMS_DELTA_LATCH1_LED_ADVERT,
+        },
+        {
+                .cdev           = {
+                        .name           = "ams-delta:email",
+                        .brightness_set = ams_delta_led_set,
+                },
+                .bitmask        = AMS_DELTA_LATCH1_LED_EMAIL,
+        },
+        {
+                .cdev           = {
+                        .name           = "ams-delta:handsfree",
+                        .brightness_set = ams_delta_led_set,
+                },
+                .bitmask        = AMS_DELTA_LATCH1_LED_HANDSFREE,
+        },
+        {
+                .cdev           = {
+                        .name           = "ams-delta:voicemail",
+                        .brightness_set = ams_delta_led_set,
+                },
+                .bitmask        = AMS_DELTA_LATCH1_LED_VOICEMAIL,
+        },
+        {
+                .cdev           = {
+                        .name           = "ams-delta:voice",
+                        .brightness_set = ams_delta_led_set,
+                },
+                .bitmask        = AMS_DELTA_LATCH1_LED_VOICE,
+        },
+};
+
+#ifdef CONFIG_PM
+static int ams_delta_led_suspend(struct platform_device *dev,
+                pm_message_t state)
+{
+        int i;
+
+        for (i = 0; i < ARRAY_SIZE(ams_delta_leds); i++)
+                led_classdev_suspend(&ams_delta_leds[i].cdev);
+
+        return 0;
+}
+
+static int ams_delta_led_resume(struct platform_device *dev)
+{
+        int i;
+
+        for (i = 0; i < ARRAY_SIZE(ams_delta_leds); i++)
+                led_classdev_resume(&ams_delta_leds[i].cdev);
+
+        return 0;
+}
+#else
+#define ams_delta_led_suspend NULL
+#define ams_delta_led_resume NULL
+#endif
+
+static int ams_delta_led_probe(struct platform_device *pdev)
+{
+        int i;
+        int ret;
+
+        for (i = ret = 0; ret >= 0 && i < ARRAY_SIZE(ams_delta_leds); i++) {
+                ret = led_classdev_register(&pdev->dev,
+                                &ams_delta_leds[i].cdev);
+        }
+
+        if (ret < 0 && i > 1) {
+                for (i = i - 2; i >= 0; i--)
+                        led_classdev_unregister(&ams_delta_leds[i].cdev);
+        }
+
+        return ret;
+}
+
+static int ams_delta_led_remove(struct platform_device *pdev)
+{
+        int i;
+
+        for (i = ARRAY_SIZE(ams_delta_leds) - 1; i >= 0; i--)
+                led_classdev_unregister(&ams_delta_leds[i].cdev);
+
+        return 0;
+}
+
+static struct platform_driver ams_delta_led_driver = {
+        .probe          = ams_delta_led_probe,
+        .remove         = ams_delta_led_remove,
+        .suspend        = ams_delta_led_suspend,
+        .resume         = ams_delta_led_resume,
+        .driver         = {
+                .name = "ams-delta-led",
+        },
+};
+
+static int __init ams_delta_led_init(void)
+{
+        return platform_driver_register(&ams_delta_led_driver);
+}
+
+static void __exit ams_delta_led_exit(void)
+{
+        return platform_driver_unregister(&ams_delta_led_driver);
+}
+
+module_init(ams_delta_led_init);
+module_exit(ams_delta_led_exit);
+
+MODULE_AUTHOR("Jonathan McDowell <noodles@earth.li>");
+MODULE_DESCRIPTION("Amstrad Delta LED driver");
+MODULE_LICENSE("GPL");