ARM: OMAP: Introduce omap_globals and prcm access functions for multi-omap

New struct omap_globals contains the omap processor specific
module bases. Use omap_globals to set the various base addresses
to make detecting omap chip type simpler.

Also introduce OMAP1_IO_ADDRESS and OMAP2_IO_ADDRESS for future multi-omap
patches.

Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 54 insertions, 1 deletions

diff --git a/arch/arm/mach-omap2/prcm.c b/arch/arm/mach-omap2/prcm.c
index b12f423b8595..9584376d055a 100644
--- a/arch/arm/mach-omap2/prcm.c
+++ b/arch/arm/mach-omap2/prcm.c
@@ -16,12 +16,18 @@
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/clk.h>
+#include <linux/io.h>
 
-#include <asm/io.h>
+#include <asm/arch/common.h>
+#include <asm/arch/prcm.h>
 
+#include "clock.h"
 #include "prm.h"
 #include "prm-regbits-24xx.h"
 
+static void __iomem *prm_base;
+static void __iomem *cm_base;
+
 extern void omap2_clk_prepare_for_reboot(void);
 
 u32 omap_prcm_get_reset_sources(void)
@@ -41,3 +47,50 @@ void omap_prcm_arch_reset(char mode)
 		prm_write_mod_reg(wkup, WKUP_MOD, RM_RSTCTRL);
 	}
 }
+
+static inline u32 __omap_prcm_read(void __iomem *base, s16 module, u16 reg)
+{
+	BUG_ON(!base);
+	return __raw_readl(base + module + reg);
+}
+
+static inline void __omap_prcm_write(u32 value, void __iomem *base,
+						s16 module, u16 reg)
+{
+	BUG_ON(!base);
+	__raw_writel(value, base + module + reg);
+}
+
+/* Read a register in a PRM module */
+u32 prm_read_mod_reg(s16 module, u16 idx)
+{
+	return __omap_prcm_read(prm_base, module, idx);
+}
+EXPORT_SYMBOL(prm_read_mod_reg);
+
+/* Write into a register in a PRM module */
+void prm_write_mod_reg(u32 val, s16 module, u16 idx)
+{
+	__omap_prcm_write(val, prm_base, module, idx);
+}
+EXPORT_SYMBOL(prm_write_mod_reg);
+
+/* Read a register in a CM module */
+u32 cm_read_mod_reg(s16 module, u16 idx)
+{
+	return __omap_prcm_read(cm_base, module, idx);
+}
+EXPORT_SYMBOL(cm_read_mod_reg);
+
+/* Write into a register in a CM module */
+void cm_write_mod_reg(u32 val, s16 module, u16 idx)
+{
+	__omap_prcm_write(val, cm_base, module, idx);
+}
+EXPORT_SYMBOL(cm_write_mod_reg);
+
+void __init omap2_set_globals_prcm(struct omap_globals *omap2_globals)
+{
+	prm_base = omap2_globals->prm;
+	cm_base = omap2_globals->cm;
+}