From: Thomas Abraham <thomas.abraham@xxxxxxxxxx>
This patch adds clock controller configuration support based on common
clock framework for Samsung EXYNOS5440.
Signed-off-by: Thomas Abraham <thomas.abraham@xxxxxxxxxx>
Cc: Mike Turquette <mturquette@xxxxxxxxxx>
Signed-off-by: Kukjin Kim <kgene.kim@xxxxxxxxxxx>
---
drivers/clk/samsung/Makefile | 1 +
drivers/clk/samsung/clk-exynos5440.c | 66 ++++++++++++++++++++++++++++++++++
2 files changed, 67 insertions(+), 0 deletions(-)
create mode 100644 drivers/clk/samsung/clk-exynos5440.c
diff --git a/drivers/clk/samsung/Makefile b/drivers/clk/samsung/Makefile
index 69487f7..27aab2c 100644
--- a/drivers/clk/samsung/Makefile
+++ b/drivers/clk/samsung/Makefile
@@ -4,3 +4,4 @@
obj-$(CONFIG_PLAT_SAMSUNG) += clk.o
obj-$(CONFIG_ARCH_EXYNOS4) += clk-exynos4.o
+obj-$(CONFIG_SOC_EXYNOS5440) += clk-exynos5440.o
diff --git a/drivers/clk/samsung/clk-exynos5440.c b/drivers/clk/samsung/clk-exynos5440.c
new file mode 100644
index 0000000..da3b918
--- /dev/null
+++ b/drivers/clk/samsung/clk-exynos5440.c
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ *
+ * 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/io.h>
+#include <linux/clk-provider.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+
+#include "clk.h"
+
+static void __iomem *clk_base;
+
+/* register a fixed factor clock type instantiated from device tree */
+void __init samsung_of_clk_register_fixed_factor(struct device_node *np)
+{
+ struct clk *clk;
+ const char *clk_name = np->name;
+ const char *parent_name;
+ u32 mul = 1, div = 1;
+
+ of_property_read_string(np, "clock-output-names", &clk_name);
+ parent_name = of_clk_get_parent_name(np, 0);
+ of_property_read_u32(np, "clock-fixed-factor-mul", &mul);
+ of_property_read_u32(np, "clock-fixed-factor-div", &div);
+
+ clk = clk_register_fixed_factor(NULL, clk_name, parent_name, 0,
+ mul, div);
+ if (clk)
+ of_clk_add_provider(np, of_clk_src_simple_get, clk);
+}
+
+static const __initconst struct of_device_id clk_match[] = {
+ { .compatible = "fixed-clock",
+ .data = of_fixed_clk_setup, },
+ { .compatible = "samsung,clock-gate",
+ .data = samsung_of_clk_register_gate, },
+ { .compatible = "samsung,fixed-factor-clock",
+ .data = samsung_of_clk_register_fixed_factor, },
+ {},
+};
+
+void __init exynos5440_of_clk_init(void)
+{
+ struct device_node *np;
+
+ np = of_find_compatible_node(NULL, NULL, "samsung,exynos5440-xmu");
+ if (!np) {
+ pr_err("%s: clock controller node not found\n", __func__);
+ return;
+ }
+
+ clk_base = of_iomap(np, 0);
+ WARN(!clk_base, "unable to map clocks registers\n");
+
+ samsung_clk_set_ctrl_base(clk_base);
+ of_clk_init(clk_match);
+}
+
+arch_initcall(exynos5440_of_clk_init);
--
1.7.4.4
--
To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
