From: Michael Hanselmann <linux-kernel@hansmi•ch>
To: benh@kernel•crashing.org
Cc: linuxppc-dev@ozlabs•org, johannes@sipsolutions•net
Subject: [PATCH] SMU LED driver
Date: Sun, 24 Dec 2006 12:23:51 +0100 [thread overview]
Message-ID: <20061224112351.GA27260@hansmi.ch> (raw)
This patch adds a driver for the front LED in recent PowerMacs which
have an SMU.
Signed-off-by: Michael Hanselmann <linux-kernel@hansmi•ch>
---
diff -Nrup --exclude-from linux-exclude-from linux-2.6.19.1.orig/drivers/macintosh/Kconfig linux-2.6.19.1/drivers/macintosh/Kconfig
--- linux-2.6.19.1.orig/drivers/macintosh/Kconfig 2006-12-24 12:19:05.000000000 +0100
+++ linux-2.6.19.1/drivers/macintosh/Kconfig 2006-12-24 12:19:41.000000000 +0100
@@ -107,6 +107,15 @@ config PMAC_SMU
on the "SMU" system control chip which replaces the old PMU.
If you don't know, say Y.
+config PMAC_SMU_LED
+ tristate "Support for the PowerMac front LED"
+ depends on PMAC_SMU
+ select NEW_LEDS
+ select LEDS_CLASS
+ help
+ Support the front LED on PowerMacs as a generic LED that can be
+ triggered by any of the supported triggers.
+
config PMAC_APM_EMU
tristate "APM emulation"
depends on PPC_PMAC && PPC32 && PM && ADB_PMU
diff -Nrup --exclude-from linux-exclude-from linux-2.6.19.1.orig/drivers/macintosh/Makefile linux-2.6.19.1/drivers/macintosh/Makefile
--- linux-2.6.19.1.orig/drivers/macintosh/Makefile 2006-12-24 12:19:05.000000000 +0100
+++ linux-2.6.19.1/drivers/macintosh/Makefile 2006-12-24 12:19:24.000000000 +0100
@@ -17,6 +17,7 @@ obj-$(CONFIG_PMAC_BACKLIGHT) += via-pmu-
obj-$(CONFIG_ADB_CUDA) += via-cuda.o
obj-$(CONFIG_PMAC_APM_EMU) += apm_emu.o
obj-$(CONFIG_PMAC_SMU) += smu.o
+obj-$(CONFIG_PMAC_SMU_LED) += smu-led.o
obj-$(CONFIG_ADB) += adb.o
obj-$(CONFIG_ADB_MACII) += via-macii.o
diff -Nrup --exclude-from linux-exclude-from linux-2.6.19.1.orig/drivers/macintosh/smu-led.c linux-2.6.19.1/drivers/macintosh/smu-led.c
--- linux-2.6.19.1.orig/drivers/macintosh/smu-led.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.19.1/drivers/macintosh/smu-led.c 2006-12-24 12:19:24.000000000 +0100
@@ -0,0 +1,91 @@
+/*
+ * smu LED class device
+ *
+ * Copyright 2006 Michael Hanselmann <linux-kernel@hansmi•ch>
+ *
+ * This code is based upon via-pmu-led, written by Johannes Berg, and a sample
+ * program written by Benjamin Herrenschmidt.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/leds.h>
+#include <asm/smu.h>
+
+static void smu_led_set(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
+{
+ struct smu_simple_cmd cmd;
+ DECLARE_COMPLETION_ONSTACK(comp);
+ unsigned int value;
+ int rc;
+
+ switch (brightness) {
+ case LED_OFF:
+ value = 0;
+ break;
+
+ case LED_FULL:
+ value = 1;
+ break;
+
+ default:
+ return;
+ }
+
+ rc = smu_queue_simple(&cmd, SMU_CMD_MISC_ee_COMMAND, 3,
+ smu_done_complete, &comp,
+ SMU_CMD_MISC_ee_LEDS_CTRL, 0x00, value);
+ if (rc) {
+ printk(KERN_ERR "smu-led: "
+ "Queueing failed, error %d\n", rc);
+ return;
+ }
+
+ wait_for_completion(&comp);
+
+ if (cmd.cmd.status != 0) {
+ printk(KERN_ERR "smu-led: Setting LED value failed\n");
+ return;
+ }
+}
+
+static struct led_classdev smu_led = {
+ .name = "smu-front-led",
+ .brightness_set = smu_led_set,
+};
+
+static int __init smu_led_init(void)
+{
+ if (!smu_present())
+ return -ENODEV;
+
+ return led_classdev_register(NULL, &smu_led);
+}
+
+static void __exit smu_led_exit(void)
+{
+}
+
+module_init(smu_led_init);
+module_exit(smu_led_exit);
+
+MODULE_AUTHOR("Michael Hanselmann <linux-kernel@hansmi•ch>");
+MODULE_DESCRIPTION("Front LED support for SMU based PowerMacs");
+MODULE_LICENSE("GPL");
next reply other threads:[~2006-12-24 11:29 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-24 11:23 Michael Hanselmann [this message]
2006-12-25 21:25 ` [PATCH] SMU LED driver Benjamin Herrenschmidt
2006-12-26 22:38 ` Johannes Berg
2007-01-06 21:19 ` Michael Hanselmann
2007-01-08 1:02 ` Benjamin Herrenschmidt
2007-01-14 13:31 ` Michael Hanselmann
2007-01-14 21:48 ` Benjamin Herrenschmidt
2007-01-15 0:26 ` Michael Hanselmann
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