ARM: OMAP: clock: Nuke plat/clock.c & reuse struct clk as clk_hw_omap

plat/clock.c which has most of usecounting/locking infrastructure will
be used only for OMAP1 until that is moved to use COMMON clk.

reuse most of what plat/clock.h has while we move to common clk, and
move most of what 'struct clk' was as 'struct clk_hw_omap' which
will then be used to define platform specific parameters.
All usecounting/locking related variables from 'struct clk' are
dropped as they will not be used with 'struct clk_hw_omap'.

Based on the original changes from Mike Turquette.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Mike Turquette <mturquette@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>

1 files changed, 64 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/clock.h b/arch/arm/mach-omap2/clock.h
index ff9789bc0fd1..697e044156dd 100644
--- a/arch/arm/mach-omap2/clock.h
+++ b/arch/arm/mach-omap2/clock.h
@@ -52,6 +52,14 @@ struct omap_clk {
 #define CK_34XX         (CK_3430ES1 | CK_3430ES2PLUS)
 #define CK_3XXX         (CK_34XX | CK_AM35XX | CK_36XX)
 
+#ifdef CONFIG_COMMON_CLK
+#include <linux/clk-provider.h>
+
+struct clockdomain;
+#define to_clk_hw_omap(_hw) container_of(_hw, struct clk_hw_omap, hw)
+
+#else
+
 struct module;
 struct clk;
 struct clockdomain;
@@ -89,6 +97,7 @@ struct clkops {
         void                    (*allow_idle)(struct clk *);
         void                    (*deny_idle)(struct clk *);
 };
+#endif
 
 /* struct clksel_rate.flags possibilities */
 #define RATE_IN_242X            (1 << 0)
@@ -228,6 +237,60 @@ struct dpll_data {
 #define INVERT_ENABLE           (1 << 4)        /* 0 enables, 1 disables */
 #define CLOCK_CLKOUTX2          (1 << 5)
 
+#ifdef CONFIG_COMMON_CLK
+/**
+ * struct clk_hw_omap - OMAP struct clk
+ * @node: list_head connecting this clock into the full clock list
+ * @enable_reg: register to write to enable the clock (see @enable_bit)
+ * @enable_bit: bitshift to write to enable/disable the clock (see @enable_reg)
+ * @flags: see "struct clk.flags possibilities" above
+ * @clksel_reg: for clksel clks, register va containing src/divisor select
+ * @clksel_mask: bitmask in @clksel_reg for the src/divisor selector
+ * @clksel: for clksel clks, pointer to struct clksel for this clock
+ * @dpll_data: for DPLLs, pointer to struct dpll_data for this clock
+ * @clkdm_name: clockdomain name that this clock is contained in
+ * @clkdm: pointer to struct clockdomain, resolved from @clkdm_name at runtime
+ * @rate_offset: bitshift for rate selection bitfield (OMAP1 only)
+ * @src_offset: bitshift for source selection bitfield (OMAP1 only)
+ *
+ * XXX @rate_offset, @src_offset should probably be removed and OMAP1
+ * clock code converted to use clksel.
+ *
+ */
+
+struct clk_hw_omap_ops;
+
+struct clk_hw_omap {
+        struct clk_hw           hw;
+        struct list_head        node;
+        unsigned long           fixed_rate;
+        u8                      fixed_div;
+        void __iomem            *enable_reg;
+        u8                      enable_bit;
+        u8                      flags;
+        void __iomem            *clksel_reg;
+        u32                     clksel_mask;
+        const struct clksel     *clksel;
+        struct dpll_data        *dpll_data;
+        const char              *clkdm_name;
+        struct clockdomain      *clkdm;
+        const struct clk_hw_omap_ops    *ops;
+};
+
+struct clk_hw_omap_ops {
+        void                    (*find_idlest)(struct clk_hw_omap *oclk,
+                                        void __iomem **idlest_reg,
+                                        u8 *idlest_bit, u8 *idlest_val);
+        void                    (*find_companion)(struct clk_hw_omap *oclk,
+                                        void __iomem **other_reg,
+                                        u8 *other_bit);
+        void                    (*allow_idle)(struct clk_hw_omap *oclk);
+        void                    (*deny_idle)(struct clk_hw_omap *oclk);
+};
+
+unsigned long omap_fixed_divisor_recalc(struct clk_hw *hw,
+                                        unsigned long parent_rate);
+#else
 /**
  * struct clk - OMAP struct clk
  * @node: list_head connecting this clock into the full clock list
@@ -456,4 +519,5 @@ extern struct clk virt_26000000_ck;
 
 extern int am33xx_clk_init(void);
 
+#endif /* CONFIG_COMMON_CLK */
 #endif