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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/power/reset/as3722-poweroff.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/power/reset/as3722-poweroff.c')
-rw-r--r--kernel/drivers/power/reset/as3722-poweroff.c95
1 files changed, 95 insertions, 0 deletions
diff --git a/kernel/drivers/power/reset/as3722-poweroff.c b/kernel/drivers/power/reset/as3722-poweroff.c
new file mode 100644
index 000000000..60d0295ff
--- /dev/null
+++ b/kernel/drivers/power/reset/as3722-poweroff.c
@@ -0,0 +1,95 @@
+/*
+ * Power off driver for ams AS3722 device.
+ *
+ * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
+ *
+ * Author: Laxman Dewangan <ldewangan@nvidia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/mfd/as3722.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+struct as3722_poweroff {
+ struct device *dev;
+ struct as3722 *as3722;
+};
+
+static struct as3722_poweroff *as3722_pm_poweroff;
+
+static void as3722_pm_power_off(void)
+{
+ int ret;
+
+ if (!as3722_pm_poweroff) {
+ pr_err("AS3722 poweroff is not initialised\n");
+ return;
+ }
+
+ ret = as3722_update_bits(as3722_pm_poweroff->as3722,
+ AS3722_RESET_CONTROL_REG, AS3722_POWER_OFF, AS3722_POWER_OFF);
+ if (ret < 0)
+ dev_err(as3722_pm_poweroff->dev,
+ "RESET_CONTROL_REG update failed, %d\n", ret);
+}
+
+static int as3722_poweroff_probe(struct platform_device *pdev)
+{
+ struct as3722_poweroff *as3722_poweroff;
+ struct device_node *np = pdev->dev.parent->of_node;
+
+ if (!np)
+ return -EINVAL;
+
+ if (!of_property_read_bool(np, "ams,system-power-controller"))
+ return 0;
+
+ as3722_poweroff = devm_kzalloc(&pdev->dev, sizeof(*as3722_poweroff),
+ GFP_KERNEL);
+ if (!as3722_poweroff)
+ return -ENOMEM;
+
+ as3722_poweroff->as3722 = dev_get_drvdata(pdev->dev.parent);
+ as3722_poweroff->dev = &pdev->dev;
+ as3722_pm_poweroff = as3722_poweroff;
+ if (!pm_power_off)
+ pm_power_off = as3722_pm_power_off;
+
+ return 0;
+}
+
+static int as3722_poweroff_remove(struct platform_device *pdev)
+{
+ if (pm_power_off == as3722_pm_power_off)
+ pm_power_off = NULL;
+ as3722_pm_poweroff = NULL;
+
+ return 0;
+}
+
+static struct platform_driver as3722_poweroff_driver = {
+ .driver = {
+ .name = "as3722-power-off",
+ },
+ .probe = as3722_poweroff_probe,
+ .remove = as3722_poweroff_remove,
+};
+
+module_platform_driver(as3722_poweroff_driver);
+
+MODULE_DESCRIPTION("Power off driver for ams AS3722 PMIC Device");
+MODULE_ALIAS("platform:as3722-power-off");
+MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
+MODULE_LICENSE("GPL v2");