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linux 3.0: add support for loopthrough expansion boards like the uLCD-lite

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also add led driver for the beacon board

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
This commit is contained in:
Koen Kooi
2011-10-11 13:27:25 +02:00
parent 008f50c784
commit 7bab703f4a
4 changed files with 351 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
recipes-kernel/linux/linux-3.0/ulcd/0001-ARM-OMAP2-beagleboard-add-support-for-loopthrough-ex.patch
+61
View File
@@ -0,0 +1,61 @@
From bbe3f55963a08d3b4a8324abee8e05f25f2d9200 Mon Sep 17 00:00:00 2001
From: Koen Kooi <koen@dominion.thruhere.net>
Date: Tue, 11 Oct 2011 13:13:35 +0200
Subject: [PATCH] ARM: OMAP2: beagleboard: add support for loopthrough expansionboard, make uLCD use it
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
---
arch/arm/mach-omap2/board-omap3beagle.c | 15 +++++++++++++--
1 files changed, 13 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-omap2/board-omap3beagle.c b/arch/arm/mach-omap2/board-omap3beagle.c
index 8c0d1a3..7e5558d 100644
--- a/arch/arm/mach-omap2/board-omap3beagle.c
+++ b/arch/arm/mach-omap2/board-omap3beagle.c
@@ -253,6 +253,7 @@ static void __init omap3_beagle_init_rev(void)
}
char expansionboard_name[16];
+char expansionboard2_name[16];
#if defined(CONFIG_WL12XX) || defined(CONFIG_WL12XX_MODULE)
#include <linux/regulator/fixed.h>
@@ -868,6 +869,15 @@ static int __init expansionboard_setup(char *str)
return 0;
}
+static int __init expansionboard2_setup(char *str)
+{
+ if (!str)
+ return -EINVAL;
+ strncpy(expansionboard2_name, str, 16);
+ printk(KERN_INFO "Beagle second expansionboard: %s\n", expansionboard2_name);
+ return 0;
+}
+
static void __init beagle_opp_init(void)
{
int r = 0;
@@ -1003,9 +1013,9 @@ static void __init omap3_beagle_init(void)
platform_device_register(&omap_vwlan_device);
}
- if(!strcmp(expansionboard_name, "bbtoys-ulcd"))
+ if(!strcmp(expansionboard2_name, "bbtoys-ulcd"))
{
- printk(KERN_INFO "Beagle expansionboard: registering bbtoys-ulcd\n");
+ printk(KERN_INFO "Beagle second expansionboard: registering bbtoys-ulcd\n");
omap_register_i2c_bus(2, 400, beagle_i2c2_bbtoys_ulcd,
ARRAY_SIZE(beagle_i2c2_bbtoys_ulcd));
}
@@ -1027,6 +1037,7 @@ static void __init omap3_beagle_init(void)
}
early_param("buddy", expansionboard_setup);
+early_param("buddy2", expansionboard2_setup);
MACHINE_START(OMAP3_BEAGLE, "OMAP3 Beagle Board")
/* Maintainer: Syed Mohammed Khasim - http://beagleboard.org */
--
1.6.6.1
recipes-kernel/linux/linux-3.0/ulcd/0002-LEDS-add-initial-support-for-WS2801-controller.patch
+242
View File
@@ -0,0 +1,242 @@
From 846578cb98e201d771098968c7022a125cb6bb07 Mon Sep 17 00:00:00 2001
From: David Anders <x0132446@ti.com>
Date: Mon, 22 Aug 2011 11:00:38 -0500
Subject: [PATCH 2/2] LEDS: add initial support for WS2801 controller
This adds initial support for the WS2801 RGB LED controller.
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
---
arch/arm/mach-omap2/board-omap3beagle.c | 11 ++
drivers/leds/Kconfig | 6 +
drivers/leds/Makefile | 1 +
drivers/leds/leds-ws2801.c | 159 +++++++++++++++++++++++++++++++
4 files changed, 177 insertions(+), 0 deletions(-)
create mode 100644 drivers/leds/leds-ws2801.c
diff --git a/arch/arm/mach-omap2/board-omap3beagle.c b/arch/arm/mach-omap2/board-omap3beagle.c
index 787891d..0e73089 100644
--- a/arch/arm/mach-omap2/board-omap3beagle.c
+++ b/arch/arm/mach-omap2/board-omap3beagle.c
@@ -802,6 +802,11 @@ static struct platform_device leds_gpio = {
},
};
+static struct platform_device ws2801_leds = {
+ .name = "ws2801-leds",
+ .id = -1,
+};
+
static struct gpio_keys_button gpio_buttons[] = {
{
.code = BTN_EXTRA,
@@ -1018,6 +1023,12 @@ static void __init omap3_beagle_init(void)
lcd_panel.name = beagle_config.lcd_driver_name;
}
+ if(!strcmp(expansionboard_name, "beacon"))
+ {
+ printk(KERN_INFO "Beagle expansionboard: registering TinCanTools Beacon LED driver\n");
+ platform_device_register(&ws2801_leds);
+ }
+
usb_musb_init(NULL);
usbhs_init(&usbhs_bdata);
omap_nand_flash_init(NAND_BUSWIDTH_16, omap3beagle_nand_partitions,
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 713d43b..fd2c4b3 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -323,6 +323,12 @@ config LEDS_BD2802
This option enables support for BD2802GU RGB LED driver chips
accessed via the I2C bus.
+config LEDS_WS2801
+ tristate "LED driver for WS2801 RGB LED"
+ depends on LEDS_CLASS
+ help
+ This option enables support for WS2801 RGB LED driver chips.
+
config LEDS_INTEL_SS4200
tristate "LED driver for Intel NAS SS4200 series"
depends on LEDS_CLASS
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index bbfd2e3..14f849e 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -43,6 +43,7 @@ obj-$(CONFIG_LEDS_MC13783) += leds-mc13783.o
obj-$(CONFIG_LEDS_NS2) += leds-ns2.o
obj-$(CONFIG_LEDS_NETXBIG) += leds-netxbig.o
obj-$(CONFIG_LEDS_ASIC3) += leds-asic3.o
+obj-$(CONFIG_LEDS_WS2801) += leds-ws2801.o
# LED SPI Drivers
obj-$(CONFIG_LEDS_DAC124S085) += leds-dac124s085.o
diff --git a/drivers/leds/leds-ws2801.c b/drivers/leds/leds-ws2801.c
new file mode 100644
index 0000000..17d0666
--- /dev/null
+++ b/drivers/leds/leds-ws2801.c
@@ -0,0 +1,159 @@
+/*
+ * LEDs driver for WS2801 RGB Controller
+ *
+ * Copyright (C) 2006 Kristian Kielhofner <kris@krisk.org>
+ *
+ * Based on leds-net48xx.c
+ *
+ * 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/init.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/io.h>
+
+#define DRVNAME "ws2801-leds"
+#define WS2801_LED_CLOCK_GPIO 159
+#define WS2801_LED_DATA_GPIO 158
+
+static unsigned long rgb_color;
+
+static struct platform_device *pdev;
+
+static void ws2801_set_rgb(void)
+{
+ int count;
+ int color_bit;
+
+ for (count = 23; count >= 0 ; count--) {
+ color_bit = (rgb_color>>count) & (1<<0);
+ gpio_set_value(WS2801_LED_DATA_GPIO, color_bit);
+ gpio_set_value(WS2801_LED_CLOCK_GPIO, 1);
+ gpio_set_value(WS2801_LED_CLOCK_GPIO, 0);
+ }
+
+}
+
+static void ws2801_red_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ rgb_color &= ((0x00<<16)|(0xff<<8)|(0xff<<0));
+ rgb_color |= (value<<16);
+ ws2801_set_rgb();
+}
+
+static void ws2801_green_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ rgb_color &= ((0xff<<16)|(0x00<<8)|(0xff<<0));
+ rgb_color |= (value<<8);
+ ws2801_set_rgb();
+}
+
+static void ws2801_blue_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ rgb_color &= ((0xff<<16)|(0xff<<8)|(0x00<<0));
+ rgb_color |= (value<<0);
+ ws2801_set_rgb();
+}
+
+static struct led_classdev ws2801_red_led = {
+ .name = "ws2801-red",
+ .brightness_set = ws2801_red_led_set,
+ .flags = LED_CORE_SUSPENDRESUME,
+};
+
+static struct led_classdev ws2801_green_led = {
+ .name = "ws2801-green",
+ .brightness_set = ws2801_green_led_set,
+ .flags = LED_CORE_SUSPENDRESUME,
+};
+
+static struct led_classdev ws2801_blue_led = {
+ .name = "ws2801-blue",
+ .brightness_set = ws2801_blue_led_set,
+ .flags = LED_CORE_SUSPENDRESUME,
+};
+
+static int ws2801_led_probe(struct platform_device *pdev)
+{
+ int ret;
+
+ ret = led_classdev_register(&pdev->dev, &ws2801_red_led);
+ if (ret < 0)
+ return ret;
+
+ ret = led_classdev_register(&pdev->dev, &ws2801_green_led);
+ if (ret < 0)
+ goto err1;
+
+ ret = led_classdev_register(&pdev->dev, &ws2801_blue_led);
+ if (ret < 0)
+ goto err2;
+
+ gpio_request_one(WS2801_LED_DATA_GPIO,
+ GPIOF_OUT_INIT_LOW, "ws2801_data");
+
+ gpio_request_one(WS2801_LED_CLOCK_GPIO,
+ GPIOF_OUT_INIT_LOW, "ws2801_clock");
+
+ ws2801_set_rgb();
+ return ret;
+
+err2:
+ led_classdev_unregister(&ws2801_green_led);
+err1:
+ led_classdev_unregister(&ws2801_red_led);
+
+ return ret;
+}
+
+static int ws2801_led_remove(struct platform_device *pdev)
+{
+ led_classdev_unregister(&ws2801_red_led);
+ led_classdev_unregister(&ws2801_green_led);
+ led_classdev_unregister(&ws2801_blue_led);
+ return 0;
+}
+
+static struct platform_driver ws2801_led_driver = {
+ .probe = ws2801_led_probe,
+ .remove = ws2801_led_remove,
+ .driver = {
+ .name = DRVNAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init ws2801_led_init(void)
+{
+ int ret;
+
+ ret = platform_driver_register(&ws2801_led_driver);
+ if (ret < 0)
+ goto out;
+
+out:
+ return ret;
+}
+
+static void __exit ws2801_led_exit(void)
+{
+ platform_device_unregister(pdev);
+ platform_driver_unregister(&ws2801_led_driver);
+}
+
+module_init(ws2801_led_init);
+module_exit(ws2801_led_exit);
+
+MODULE_AUTHOR("David Anders <danders@tincantools.com>");
+MODULE_DESCRIPTION("WS2801 RGB LED driver");
+MODULE_LICENSE("GPL");
+
--
1.6.6.1