ARM: OMAP: Turn CM and PRM access into functions

Otherwise compiling in omap2 and omap3 will not work.

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

1 files changed, 38 insertions, 7 deletions

diff --git a/arch/arm/mach-omap2/prcm.c b/arch/arm/mach-omap2/prcm.c
index 9584376d055a..fd92a80f38f2 100644
--- a/arch/arm/mach-omap2/prcm.c
+++ b/arch/arm/mach-omap2/prcm.c
@@ -28,10 +28,9 @@
 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)
 {
+	/* XXX This presumably needs modification for 34XX */
 	return prm_read_mod_reg(WKUP_MOD, RM_RSTST) & 0x7f;
 }
 EXPORT_SYMBOL(omap_prcm_get_reset_sources);
@@ -39,13 +38,17 @@ EXPORT_SYMBOL(omap_prcm_get_reset_sources);
 /* Resets clock rates and reboots the system. Only called from system.h */
 void omap_prcm_arch_reset(char mode)
 {
-	u32 wkup;
+	s16 prcm_offs;
 	omap2_clk_prepare_for_reboot();
 
-	if (cpu_is_omap24xx()) {
-		wkup = prm_read_mod_reg(WKUP_MOD, RM_RSTCTRL) | OMAP_RST_DPLL3;
-		prm_write_mod_reg(wkup, WKUP_MOD, RM_RSTCTRL);
-	}
+	if (cpu_is_omap24xx())
+		prcm_offs = WKUP_MOD;
+	else if (cpu_is_omap34xx())
+		prcm_offs = OMAP3430_GR_MOD;
+	else
+		WARN_ON(1);
+
+	prm_set_mod_reg_bits(OMAP_RST_DPLL3, prcm_offs, RM_RSTCTRL);
 }
 
 static inline u32 __omap_prcm_read(void __iomem *base, s16 module, u16 reg)
@@ -75,6 +78,20 @@ void prm_write_mod_reg(u32 val, s16 module, u16 idx)
 }
 EXPORT_SYMBOL(prm_write_mod_reg);
 
+/* Read-modify-write a register in a PRM module. Caller must lock */
+u32 prm_rmw_mod_reg_bits(u32 mask, u32 bits, s16 module, s16 idx)
+{
+	u32 v;
+
+	v = prm_read_mod_reg(module, idx);
+	v &= ~mask;
+	v |= bits;
+	prm_write_mod_reg(v, module, idx);
+
+	return v;
+}
+EXPORT_SYMBOL(prm_rmw_mod_reg_bits);
+
 /* Read a register in a CM module */
 u32 cm_read_mod_reg(s16 module, u16 idx)
 {
@@ -89,6 +106,20 @@ void cm_write_mod_reg(u32 val, s16 module, u16 idx)
 }
 EXPORT_SYMBOL(cm_write_mod_reg);
 
+/* Read-modify-write a register in a CM module. Caller must lock */
+u32 cm_rmw_mod_reg_bits(u32 mask, u32 bits, s16 module, s16 idx)
+{
+	u32 v;
+
+	v = cm_read_mod_reg(module, idx);
+	v &= ~mask;
+	v |= bits;
+	cm_write_mod_reg(v, module, idx);
+
+	return v;
+}
+EXPORT_SYMBOL(cm_rmw_mod_reg_bits);
+
 void __init omap2_set_globals_prcm(struct omap_globals *omap2_globals)
 {
 	prm_base = omap2_globals->prm;