ARM i.MX: prepare for common clock framework

- Add necessary #ifdefs for CONFIG_COMMON_CLOCK
- Add a global spinlock to protect the CCM registers

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 44 insertions, 0 deletions

diff --git a/arch/arm/mach-imx/clk.h b/arch/arm/mach-imx/clk.h
new file mode 100644
index 000000000000..00f2590e0b38
--- /dev/null
+++ b/arch/arm/mach-imx/clk.h
@@ -0,0 +1,44 @@
+#ifndef __MACH_IMX_CLK_H
+#define __MACH_IMX_CLK_H
+
+#include <linux/spinlock.h>
+#include <linux/clk-provider.h>
+#include <mach/clock.h>
+
+struct clk *imx_clk_pllv1(const char *name, char *parent,
+                void __iomem *base);
+
+static inline struct clk *imx_clk_fixed(const char *name, int rate)
+{
+        return clk_register_fixed_rate(NULL, name, NULL, CLK_IS_ROOT, rate);
+}
+
+static inline struct clk *imx_clk_divider(const char *name, const char *parent,
+                void __iomem *reg, u8 shift, u8 width)
+{
+        return clk_register_divider(NULL, name, parent, CLK_SET_RATE_PARENT,
+                        reg, shift, width, 0, &imx_ccm_lock);
+}
+
+static inline struct clk *imx_clk_gate(const char *name, const char *parent,
+                void __iomem *reg, u8 shift)
+{
+        return clk_register_gate(NULL, name, parent, CLK_SET_RATE_PARENT, reg,
+                        shift, 0, &imx_ccm_lock);
+}
+
+static inline struct clk *imx_clk_mux(const char *name, void __iomem *reg,
+                u8 shift, u8 width, const char **parents, int num_parents)
+{
+        return clk_register_mux(NULL, name, parents, num_parents, 0, reg, shift,
+                        width, 0, &imx_ccm_lock);
+}
+
+static inline struct clk *imx_clk_fixed_factor(const char *name,
+                const char *parent, unsigned int mult, unsigned int div)
+{
+        return clk_register_fixed_factor(NULL, name, parent,
+                        CLK_SET_RATE_PARENT, mult, div);
+}
+
+#endif