Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / clk / ti / clockdomain.c

diff --git a/kernel/drivers/clk/ti/clockdomain.c b/kernel/drivers/clk/ti/clockdomain.c
new file mode 100644 (file)
index 0000000..35fe108
--- /dev/null
+++ b/kernel/drivers/clk/ti/clockdomain.c
@@ -0,0 +1,75 @@
+/*
+ * OMAP clockdomain support
+ *
+ * Copyright (C) 2013 Texas Instruments, Inc.
+ *
+ * Tero Kristo <t-kristo@ti.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.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/clk/ti.h>
+
+#undef pr_fmt
+#define pr_fmt(fmt) "%s: " fmt, __func__
+
+static void __init of_ti_clockdomain_setup(struct device_node *node)
+{
+       struct clk *clk;
+       struct clk_hw *clk_hw;
+       const char *clkdm_name = node->name;
+       int i;
+       int num_clks;
+
+       num_clks = of_count_phandle_with_args(node, "clocks", "#clock-cells");
+
+       for (i = 0; i < num_clks; i++) {
+               clk = of_clk_get(node, i);
+               if (IS_ERR(clk)) {
+                       pr_err("%s: Failed get %s' clock nr %d (%ld)\n",
+                              __func__, node->full_name, i, PTR_ERR(clk));
+                       continue;
+               }
+               if (__clk_get_flags(clk) & CLK_IS_BASIC) {
+                       pr_warn("can't setup clkdm for basic clk %s\n",
+                               __clk_get_name(clk));
+                       continue;
+               }
+               clk_hw = __clk_get_hw(clk);
+               to_clk_hw_omap(clk_hw)->clkdm_name = clkdm_name;
+               omap2_init_clk_clkdm(clk_hw);
+       }
+}
+
+static const struct of_device_id ti_clkdm_match_table[] __initconst = {
+       { .compatible = "ti,clockdomain" },
+       { }
+};
+
+/**
+ * ti_dt_clockdomains_setup - setup device tree clockdomains
+ *
+ * Initializes clockdomain nodes for a SoC. This parses through all the
+ * nodes with compatible = "ti,clockdomain", and add the clockdomain
+ * info for all the clocks listed under these. This function shall be
+ * called after rest of the DT clock init has completed and all
+ * clock nodes have been registered.
+ */
+void __init ti_dt_clockdomains_setup(void)
+{
+       struct device_node *np;
+       for_each_matching_node(np, ti_clkdm_match_table) {
+               of_ti_clockdomain_setup(np);
+       }
+}