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From b4c8a1cdfbbaf615a6d9da3e46f1b788fc0f1568 Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Thu, 31 Oct 2013 10:53:06 -0700
Subject: [PATCH 6/7] leds: add driver for the iPAQ micro
This adds a driver for the iPAQ microcontroller LED.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
drivers/leds/Kconfig | 7 +++
drivers/leds/Makefile | 1 +
drivers/leds/leds-ipaq-micro.c | 139 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 147 insertions(+)
create mode 100644 drivers/leds/leds-ipaq-micro.c
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 72156c123033..39dae8a15297 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -143,6 +143,13 @@ config LEDS_SUNFIRE
This option enables support for the Left, Middle, and Right
LEDs on the I/O and CPU boards of SunFire UltraSPARC servers.
+config LEDS_IPAQ_MICRO
+ tristate "LED Support for the Compaq iPAQ h3xxx"
+ depends on MFD_IPAQ_MICRO
+ help
+ Choose this option if you want to use the notification LED on
+ Compaq/HP iPAQ h3100 and h3600.
+
config LEDS_HP6XX
tristate "LED Support for the HP Jornada 6xx"
depends on LEDS_CLASS
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index 3cd76dbd9be2..db0e6e856ca9 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -31,6 +31,7 @@ obj-$(CONFIG_LEDS_LP8501) += leds-lp8501.o
obj-$(CONFIG_LEDS_LP8788) += leds-lp8788.o
obj-$(CONFIG_LEDS_TCA6507) += leds-tca6507.o
obj-$(CONFIG_LEDS_CLEVO_MAIL) += leds-clevo-mail.o
+obj-$(CONFIG_LEDS_IPAQ_MICRO) += leds-ipaq-micro.o
obj-$(CONFIG_LEDS_HP6XX) += leds-hp6xx.o
obj-$(CONFIG_LEDS_OT200) += leds-ot200.o
obj-$(CONFIG_LEDS_FSG) += leds-fsg.o
diff --git a/drivers/leds/leds-ipaq-micro.c b/drivers/leds/leds-ipaq-micro.c
new file mode 100644
index 000000000000..a716ec27f066
--- /dev/null
+++ b/drivers/leds/leds-ipaq-micro.c
@@ -0,0 +1,139 @@
+/*
+ * 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.
+ *
+ * h3xxx atmel micro companion support, notification LED subdevice
+ *
+ * Author : Linus Walleij <linus.walleij@linaro.org>
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/ipaq-micro.h>
+#include <linux/leds.h>
+
+#define LED_YELLOW 0x00
+#define LED_GREEN 0x01
+
+#define LED_EN (1 << 4) /* LED ON/OFF 0:off, 1:on */
+#define LED_AUTOSTOP (1 << 5) /* LED ON/OFF auto stop set 0:disable, 1:enable */
+#define LED_ALWAYS (1 << 6) /* LED Interrupt Mask 0:No mask, 1:mask */
+
+static void micro_leds_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct ipaq_micro *micro = dev_get_drvdata(led_cdev->dev->parent->parent);
+ /*
+ * In this message:
+ * Byte 0 = LED color: 0 = yellow, 1 = green
+ * yellow LED is always ~30 blinks per minute
+ * Byte 1 = duration (flags?) appears to be ignored
+ * Byte 2 = green ontime in 1/10 sec (deciseconds)
+ * 1 = 1/10 second
+ * 0 = 256/10 second
+ * Byte 3 = green offtime in 1/10 sec (deciseconds)
+ * 1 = 1/10 second
+ * 0 = 256/10 seconds
+ */
+ struct ipaq_micro_msg msg = {
+ .id = MSG_NOTIFY_LED,
+ .tx_len = 4,
+ };
+
+ msg.tx_data[0] = LED_GREEN;
+ msg.tx_data[1] = 0;
+ if (value) {
+ msg.tx_data[2] = 0; /* Duty cycle 256 */
+ msg.tx_data[3] = 1;
+ } else {
+ msg.tx_data[2] = 1;
+ msg.tx_data[3] = 0; /* Duty cycle 256 */
+ }
+ ipaq_micro_tx_msg_sync(micro, &msg);
+}
+
+/* Maximum duty cycle in ms 256/10 sec = 25600 ms */
+#define IPAQ_LED_MAX_DUTY 25600
+
+static int micro_leds_blink_set(struct led_classdev *led_cdev,
+ unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ struct ipaq_micro *micro = dev_get_drvdata(led_cdev->dev->parent->parent);
+ /*
+ * In this message:
+ * Byte 0 = LED color: 0 = yellow, 1 = green
+ * yellow LED is always ~30 blinks per minute
+ * Byte 1 = duration (flags?) appears to be ignored
+ * Byte 2 = green ontime in 1/10 sec (deciseconds)
+ * 1 = 1/10 second
+ * 0 = 256/10 second
+ * Byte 3 = green offtime in 1/10 sec (deciseconds)
+ * 1 = 1/10 second
+ * 0 = 256/10 seconds
+ */
+ struct ipaq_micro_msg msg = {
+ .id = MSG_NOTIFY_LED,
+ .tx_len = 4,
+ };
+
+ msg.tx_data[0] = LED_GREEN;
+ if (*delay_on > IPAQ_LED_MAX_DUTY ||
+ *delay_off > IPAQ_LED_MAX_DUTY)
+ return -EINVAL;
+
+ if (*delay_on == 0 && *delay_off == 0) {
+ *delay_on = 100;
+ *delay_off = 100;
+ }
+
+ msg.tx_data[1] = 0;
+ if (*delay_on >= IPAQ_LED_MAX_DUTY)
+ msg.tx_data[2] = 0;
+ else
+ msg.tx_data[2] = (u8) DIV_ROUND_CLOSEST(*delay_on, 100);
+ if (*delay_off >= IPAQ_LED_MAX_DUTY)
+ msg.tx_data[3] = 0;
+ else
+ msg.tx_data[3] = (u8) DIV_ROUND_CLOSEST(*delay_off, 100);
+ return ipaq_micro_tx_msg_sync(micro, &msg);
+}
+
+static struct led_classdev micro_led = {
+ .name = "notify",
+ .brightness_set = micro_leds_brightness_set,
+ .blink_set = micro_leds_blink_set,
+ .flags = LED_CORE_SUSPENDRESUME,
+};
+
+static int micro_leds_probe(struct platform_device *pdev)
+{
+ int ret;
+
+ ret = led_classdev_register(&pdev->dev, µ_led);
+ if (ret)
+ dev_err(&pdev->dev, "registering led failed: %d\n", ret);
+ dev_info(&pdev->dev, "iPAQ micro notification LED driver\n");
+
+ return 0;
+}
+
+static int micro_leds_remove(struct platform_device *pdev)
+{
+ led_classdev_unregister(µ_led);
+ return 0;
+}
+
+struct platform_driver micro_leds_device_driver = {
+ .driver = {
+ .name = "ipaq-micro-leds",
+ },
+ .probe = micro_leds_probe,
+ .remove = micro_leds_remove,
+};
+module_platform_driver(micro_leds_device_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("driver for iPAQ Atmel micro leds");
+MODULE_ALIAS("platform:ipaq-micro-leds");
--
1.9.0
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