OMAP2 clock: split OMAP2420, OMAP2430 clock data into their own files

In preparation for multi-OMAP2 kernels, split
mach-omap2/clock2xxx_data.c into mach-omap2/clock2420_data.c and
mach-omap2/clock2430_data.c.  2430 uses a different device space
physical memory layout than past or future OMAPs, and we use a
different virtual memory layout as well, which causes trouble for
architecture-level code/data that tries to support both.  We tried
using offsets from the virtual base last year, but those patches never
made it upstream; so after some discussion with Tony about the best
all-around approach, we'll just grit our teeth and duplicate the
structures.  The maintenance advantages of a single kernel config that
can compile and boot on OMAP2, 3, and 4 platforms are simply too
compelling.

This approach does have some nice benefits beyond multi-OMAP 2 kernel
support.  The runtime size of OMAP2420-specific and OMAP2430-specific
kernels is smaller, since unused clocks for the other OMAP2 chip will
no longer be compiled in.  (At some point we will mark the clock data
__initdata and allocate it during registration, which will eliminate
the runtime memory advantage.)  It also makes the clock trees slightly
easier to read, since 2420-specific and 2430-specific clocks are no
longer mixed together.

This patch also splits 2430-specific clock code into its own file,
mach-omap2/clock2430.c, which is only compiled in for 2430 builds -
mostly for organizational clarity.

While here, fix a bug in the OMAP2430 clock tree: "emul_ck" was
incorrectly marked as being 2420-only, when actually it is present on
both OMAP2420 and OMAP2430.

Thanks to Tony for some good discussions about how to approach this
problem.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Richard Woodruff <r-woodruff2@ti.com>

1 files changed, 13 insertions, 13 deletions

diff --git a/arch/arm/mach-omap2/clock2xxx.h b/arch/arm/mach-omap2/clock2xxx.h
index 32f3d0aa8fc..6a658b890c1 100644
--- a/arch/arm/mach-omap2/clock2xxx.h
+++ b/arch/arm/mach-omap2/clock2xxx.h
@@ -1,12 +1,12 @@
 /*
  * OMAP2 clock function prototypes and macros
  *
- * Copyright (C) 2005-2009 Texas Instruments, Inc.
- * Copyright (C) 2004-2009 Nokia Corporation
+ * Copyright (C) 2005-2010 Texas Instruments, Inc.
+ * Copyright (C) 2004-2010 Nokia Corporation
  */
 
-#ifndef __ARCH_ARM_MACH_OMAP2_CLOCK_24XX_H
-#define __ARCH_ARM_MACH_OMAP2_CLOCK_24XX_H
+#ifndef __ARCH_ARM_MACH_OMAP2_CLOCK2XXX_H
+#define __ARCH_ARM_MACH_OMAP2_CLOCK2XXX_H
 
 unsigned long omap2_table_mpu_recalc(struct clk *clk);
 int omap2_select_table_rate(struct clk *clk, unsigned long rate);
@@ -19,20 +19,20 @@ unsigned long omap2xxx_clk_get_core_rate(struct clk *clk);
 u32 omap2xxx_get_apll_clkin(void);
 u32 omap2xxx_get_sysclkdiv(void);
 void omap2xxx_clk_prepare_for_reboot(void);
-int omap2xxx_clk_init(void);
 
-/* REVISIT: These should be set dynamically for CONFIG_MULTI_OMAP2 */
 #ifdef CONFIG_ARCH_OMAP2420
-#define OMAP_CM_REGADDR                 OMAP2420_CM_REGADDR
-#define OMAP24XX_PRCM_CLKOUT_CTRL       OMAP2420_PRCM_CLKOUT_CTRL
-#define OMAP24XX_PRCM_CLKEMUL_CTRL      OMAP2420_PRCM_CLKEMUL_CTRL
+int omap2420_clk_init(void);
 #else
-#define OMAP_CM_REGADDR                 OMAP2430_CM_REGADDR
-#define OMAP24XX_PRCM_CLKOUT_CTRL       OMAP2430_PRCM_CLKOUT_CTRL
-#define OMAP24XX_PRCM_CLKEMUL_CTRL      OMAP2430_PRCM_CLKEMUL_CTRL
+#define omap2420_clk_init()     0
 #endif
 
-extern void __iomem *prcm_clksrc_ctrl;
+#ifdef CONFIG_ARCH_OMAP2430
+int omap2430_clk_init(void);
+#else
+#define omap2430_clk_init()     0
+#endif
+
+extern void __iomem *prcm_clksrc_ctrl, *cm_idlest_pll;
 
 extern struct clk *dclk;