Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / clk / x86 / clk-lpt.c

diff --git a/kernel/drivers/clk/x86/clk-lpt.c b/kernel/drivers/clk/x86/clk-lpt.c
new file mode 100644 (file)
index 0000000..f827083
--- /dev/null
+++ b/kernel/drivers/clk/x86/clk-lpt.c
@@ -0,0 +1,52 @@
+/*
+ * Intel Low Power Subsystem clocks.
+ *
+ * Copyright (C) 2013, Intel Corporation
+ * Authors: Mika Westerberg <mika.westerberg@linux.intel.com>
+ *         Heikki Krogerus <heikki.krogerus@linux.intel.com>
+ *
+ * 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/clk.h>
+#include <linux/clkdev.h>
+#include <linux/clk-provider.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/platform_data/clk-lpss.h>
+#include <linux/platform_device.h>
+
+static int lpt_clk_probe(struct platform_device *pdev)
+{
+       struct lpss_clk_data *drvdata;
+       struct clk *clk;
+
+       drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
+       if (!drvdata)
+               return -ENOMEM;
+
+       /* LPSS free running clock */
+       drvdata->name = "lpss_clk";
+       clk = clk_register_fixed_rate(&pdev->dev, drvdata->name, NULL,
+                                     CLK_IS_ROOT, 100000000);
+       if (IS_ERR(clk))
+               return PTR_ERR(clk);
+
+       drvdata->clk = clk;
+       platform_set_drvdata(pdev, drvdata);
+       return 0;
+}
+
+static struct platform_driver lpt_clk_driver = {
+       .driver = {
+               .name = "clk-lpt",
+       },
+       .probe = lpt_clk_probe,
+};
+
+int __init lpt_clk_init(void)
+{
+       return platform_driver_register(&lpt_clk_driver);
+}