summaryrefslogtreecommitdiff
path: root/drivers/clk/ti
diff options
context:
space:
mode:
authorTero Kristo <t-kristo@ti.com>2013-07-18 12:52:33 +0400
committerMike Turquette <mturquette@linaro.org>2014-01-18 00:32:38 +0400
commita8aceccb4d5db0acb476b74051525fb26f57f8ae (patch)
tree1ea3c1b912f065fab116417d750d208de1973454 /drivers/clk/ti
parent68b9f608679424ea08e6fbead5dc82599bfe667f (diff)
downloadlinux-a8aceccb4d5db0acb476b74051525fb26f57f8ae.tar.xz
CLK: TI: add DT alias clock registration mechanism
Some devices require their clocks to be available with a specific dev-id con-id mapping. With DT, the clocks can be found by default only with their name, or alternatively through the device node of the consumer. With drivers, that don't support DT fully yet, add mechanism to register specific clock names. Signed-off-by: Tero Kristo <t-kristo@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
Diffstat (limited to 'drivers/clk/ti')
-rw-r--r--drivers/clk/ti/Makefile3
-rw-r--r--drivers/clk/ti/clk.c55
2 files changed, 58 insertions, 0 deletions
diff --git a/drivers/clk/ti/Makefile b/drivers/clk/ti/Makefile
new file mode 100644
index 000000000000..1825f7f4bdc0
--- /dev/null
+++ b/drivers/clk/ti/Makefile
@@ -0,0 +1,3 @@
+ifneq ($(CONFIG_OF),)
+obj-y += clk.o
+endif
diff --git a/drivers/clk/ti/clk.c b/drivers/clk/ti/clk.c
new file mode 100644
index 000000000000..ef1a7cdecfd9
--- /dev/null
+++ b/drivers/clk/ti/clk.c
@@ -0,0 +1,55 @@
+/*
+ * TI clock 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/clkdev.h>
+#include <linux/clk/ti.h>
+#include <linux/of.h>
+
+#undef pr_fmt
+#define pr_fmt(fmt) "%s: " fmt, __func__
+
+/**
+ * ti_dt_clocks_register - register DT alias clocks during boot
+ * @oclks: list of clocks to register
+ *
+ * Register alias or non-standard DT clock entries during boot. By
+ * default, DT clocks are found based on their node name. If any
+ * additional con-id / dev-id -> clock mapping is required, use this
+ * function to list these.
+ */
+void __init ti_dt_clocks_register(struct ti_dt_clk oclks[])
+{
+ struct ti_dt_clk *c;
+ struct device_node *node;
+ struct clk *clk;
+ struct of_phandle_args clkspec;
+
+ for (c = oclks; c->node_name != NULL; c++) {
+ node = of_find_node_by_name(NULL, c->node_name);
+ clkspec.np = node;
+ clk = of_clk_get_from_provider(&clkspec);
+
+ if (!IS_ERR(clk)) {
+ c->lk.clk = clk;
+ clkdev_add(&c->lk);
+ } else {
+ pr_warn("failed to lookup clock node %s\n",
+ c->node_name);
+ }
+ }
+}