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Subject[PATCH 3/5] leds: add support for TS-5500 LED
Date
From: Jonas Fonseca <jonas.fonseca@savoirfairelinux.com>

Add support for the TS-5500 on-board LED

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
---
MAINTAINERS | 1 +
arch/x86/platform/ts5500/Kconfig | 7 ++
arch/x86/platform/ts5500/Makefile | 3 +-
arch/x86/platform/ts5500/ts5500.c | 41 ++++++++++
arch/x86/platform/ts5500/ts5500_leds.c | 133 ++++++++++++++++++++++++++++++++
5 files changed, 184 insertions(+), 1 deletions(-)
create mode 100644 arch/x86/platform/ts5500/ts5500_leds.c
diff --git a/MAINTAINERS b/MAINTAINERS
index c6cf870..034a25f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6142,6 +6142,7 @@ F: arch/x86/platform/ts5500/Makefile
F: arch/x86/platform/ts5500/ts5500.c
F: arch/x86/platform/ts5500/ts5500_gpio.c
F: arch/x86/platform/ts5500/ts5500_gpio.h
+F: arch/x86/platform/ts5500/ts5500_leds.c

TEGRA SUPPORT
M: Colin Cross <ccross@android.com>
diff --git a/arch/x86/platform/ts5500/Kconfig b/arch/x86/platform/ts5500/Kconfig
index bb4ef81..e7fbf34 100644
--- a/arch/x86/platform/ts5500/Kconfig
+++ b/arch/x86/platform/ts5500/Kconfig
@@ -12,3 +12,10 @@ config TS5500_GPIO
default y
help
This enables support for the DIO headers for GPIO usage.
+
+config TS5500_LEDS
+ bool "TS-5500 LED Support"
+ depends on TS5500 && LEDS_CLASS
+ default y
+ help
+ This option enables support for the on-chip LED.
diff --git a/arch/x86/platform/ts5500/Makefile b/arch/x86/platform/ts5500/Makefile
index 9eb93fe..4d23812 100644
--- a/arch/x86/platform/ts5500/Makefile
+++ b/arch/x86/platform/ts5500/Makefile
@@ -1,2 +1,3 @@
obj-$(CONFIG_TS5500) += ts5500.o
-obj-$(CONFIG_TS5500_GPIO) += ts5500_gpio.o
\ No newline at end of file
+obj-$(CONFIG_TS5500_GPIO) += ts5500_gpio.o
+obj-$(CONFIG_TS5500_LEDS) += ts5500_leds.o
\ No newline at end of file
diff --git a/arch/x86/platform/ts5500/ts5500.c b/arch/x86/platform/ts5500/ts5500.c
index 1ed0097..a455178 100644
--- a/arch/x86/platform/ts5500/ts5500.c
+++ b/arch/x86/platform/ts5500/ts5500.c
@@ -24,6 +24,7 @@
#include <linux/io.h>
#include <linux/slab.h>
#include <asm/processor.h>
+#include <linux/leds.h>
#include <linux/gpio.h>
#include "ts5500_gpio.h"

@@ -143,6 +144,43 @@ error:

#define TS5500_IS_JP_SET(sbc, jmp) (!!(sbc->jumpers & TS5500_JP##jmp))

+#ifdef CONFIG_TS5500_LEDS
+static struct led_info ts5500_led_info = {
+ .name = "ts5500_leds",
+ .default_trigger = "ts5500_leds",
+ .flags = TS5500_LED_FLAG
+};
+
+static struct led_platform_data ts5500_led_platform_data = {
+ .num_leds = 1,
+ .leds = &ts5500_led_info
+};
+
+static struct resource ts5500_led_resources[] = {
+ {
+ .name = "ts5500_leds",
+ .start = TS5500_LED_JMPRS_REG,
+ .end = TS5500_LED_JMPRS_REG,
+ .flags = IORESOURCE_IO
+ }
+};
+
+static void ts5500_led_release(struct device *dev)
+{
+ /* noop */
+}
+
+static struct platform_device ts5500_led_device = {
+ .name = "ts5500_leds",
+ .resource = ts5500_led_resources,
+ .num_resources = ARRAY_SIZE(ts5500_led_resources),
+ .id = -1,
+ .dev = {
+ .platform_data = &ts5500_led_platform_data,
+ .release = ts5500_led_release
+ }
+};
+#endif

#ifdef CONFIG_TS5500_GPIO
/* Callback for releasing resources */
@@ -160,6 +198,9 @@ static struct platform_device ts5500_gpio_device = {
};
#endif
static struct platform_device *ts5500_devices[] __initdata = {
+#ifdef CONFIG_TS5500_LEDS
+ &ts5500_led_device,
+#endif
#ifdef CONFIG_TS5500_GPIO
&ts5500_gpio_device,
#endif
diff --git a/arch/x86/platform/ts5500/ts5500_leds.c b/arch/x86/platform/ts5500/ts5500_leds.c
new file mode 100644
index 0000000..b6be116
--- /dev/null
+++ b/arch/x86/platform/ts5500/ts5500_leds.c
@@ -0,0 +1,133 @@
+/*
+ * Technologic Systems TS-5500 boards - LED driver
+ *
+ * Copyright (c) 2010 Savoir-faire Linux Inc.
+ * Jonas Fonseca <jonas.fonseca@savoirfairelinux.com>
+ *
+ * Portions Copyright (c) 2008 Compulab, Ltd.
+ * Mike Rapoport <mike@compulab.co.il>
+ *
+ * Portions Copyright (c) 2006-2008 Marvell International Ltd.
+ * Eric Miao <eric.miao@marvell.com>
+ *
+ * Based on drivers/leds/leds-da903x.c from linux-2.6.32.8.
+ *
+ * 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/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <linux/io.h>
+#include <linux/leds.h>
+
+/**
+ * struct ts5500_led - LED structure
+ * @cdev: LED class device structure.
+ * @work: Work structure.
+ * @new_brightness: LED brightness.
+ * @ioaddr: LED I/O address.
+ */
+struct ts5500_led {
+ struct led_classdev cdev;
+ struct work_struct work;
+ enum led_brightness new_brightness;
+ int ioaddr;
+ int bit;
+};
+
+static void ts5500_led_work(struct work_struct *work)
+{
+ struct ts5500_led *led = container_of(work, struct ts5500_led, work);
+ u8 val = led->new_brightness ? led->bit : 0;
+
+ outb(val, led->ioaddr);
+}
+
+static void ts5500_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct ts5500_led *led = container_of(led_cdev, struct ts5500_led,
+ cdev);
+
+ led->new_brightness = value;
+ schedule_work(&led->work);
+}
+
+static int __devinit ts5500_led_probe(struct platform_device *pdev)
+{
+ struct led_platform_data *pdata = pdev->dev.platform_data;
+ struct ts5500_led *led;
+ struct resource *res;
+ int ret;
+
+ if (pdata == NULL || !pdata->num_leds) {
+ dev_err(&pdev->dev, "No platform data available\n");
+ return -ENODEV;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "Failed to get I/O resource\n");
+ return -EBUSY;
+ }
+
+ led = kzalloc(sizeof(struct ts5500_led), GFP_KERNEL);
+ if (led == NULL) {
+ dev_err(&pdev->dev, "Failed to alloc memory for LED device\n");
+ return -ENOMEM;
+ }
+
+ led->cdev.name = pdata->leds[0].name;
+ led->cdev.default_trigger = pdata->leds[0].default_trigger;
+ led->cdev.brightness_set = ts5500_led_set;
+ led->cdev.brightness = LED_OFF;
+
+ led->ioaddr = res->start;
+ led->bit = pdata->leds[0].flags;
+ led->new_brightness = LED_OFF;
+
+ INIT_WORK(&led->work, ts5500_led_work);
+
+ ret = led_classdev_register(pdev->dev.parent, &led->cdev);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to register LED\n");
+ goto err;
+ }
+
+ platform_set_drvdata(pdev, led);
+ return 0;
+
+err:
+ kfree(led);
+ return ret;
+}
+
+static struct platform_driver ts5500_led_driver = {
+ .driver = {
+ .name = "ts5500_leds",
+ .owner = THIS_MODULE
+ },
+ .probe = ts5500_led_probe
+};
+
+static const struct platform_device_id ts5500_devices[] = {
+ { "ts5500_leds", 0 },
+ {}
+};
+MODULE_DEVICE_TABLE(platform, ts5500_devices);
+
+static int __init ts5500_led_init(void)
+{
+ return platform_driver_register(&ts5500_led_driver);
+}
+module_init(ts5500_led_init);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jonas Fonseca <jonas.fonseca@savoirfairelinux.com>");
+MODULE_DESCRIPTION("LED driver for Technologic Systems TS-5500");
--
1.7.6


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