summaryrefslogtreecommitdiffstats
path: root/drivers/clk/ti/fixed-factor.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/clk/ti/fixed-factor.c')
-rw-r--r--drivers/clk/ti/fixed-factor.c61
1 files changed, 61 insertions, 0 deletions
diff --git a/drivers/clk/ti/fixed-factor.c b/drivers/clk/ti/fixed-factor.c
new file mode 100644
index 0000000000..c102c53201
--- /dev/null
+++ b/drivers/clk/ti/fixed-factor.c
@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * TI Fixed Factor Clock
+ *
+ * Copyright (C) 2013 Texas Instruments, Inc.
+ *
+ * Tero Kristo <t-kristo@ti.com>
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/clk/ti.h>
+
+#include "clock.h"
+
+#undef pr_fmt
+#define pr_fmt(fmt) "%s: " fmt, __func__
+
+/**
+ * of_ti_fixed_factor_clk_setup - Setup function for TI fixed factor clock
+ * @node: device node for this clock
+ *
+ * Sets up a simple fixed factor clock based on device tree info.
+ */
+static void __init of_ti_fixed_factor_clk_setup(struct device_node *node)
+{
+ struct clk *clk;
+ const char *clk_name = ti_dt_clk_name(node);
+ const char *parent_name;
+ u32 div, mult;
+ u32 flags = 0;
+
+ if (of_property_read_u32(node, "ti,clock-div", &div)) {
+ pr_err("%pOFn must have a clock-div property\n", node);
+ return;
+ }
+
+ if (of_property_read_u32(node, "ti,clock-mult", &mult)) {
+ pr_err("%pOFn must have a clock-mult property\n", node);
+ return;
+ }
+
+ if (of_property_read_bool(node, "ti,set-rate-parent"))
+ flags |= CLK_SET_RATE_PARENT;
+
+ parent_name = of_clk_get_parent_name(node, 0);
+
+ clk = clk_register_fixed_factor(NULL, clk_name, parent_name, flags,
+ mult, div);
+
+ if (!IS_ERR(clk)) {
+ of_clk_add_provider(node, of_clk_src_simple_get, clk);
+ of_ti_clk_autoidle_setup(node);
+ ti_clk_add_alias(clk, clk_name);
+ }
+}
+CLK_OF_DECLARE(ti_fixed_factor_clk, "ti,fixed-factor-clock",
+ of_ti_fixed_factor_clk_setup);