[PATCHv4,1/8] OMAP3: Clockdomain: Added API for checking if HWSUP is enabled

Commit Message

Tero Kristo Jan. 22, 2010, 5:55 p.m. UTC

None

Patch

diff --git a/arch/arm/mach-omap2/clockdomain.c b/arch/arm/mach-omap2/clockdomain.c
index dd285f0..728d1b0 100644
--- a/arch/arm/mach-omap2/clockdomain.c
+++ b/arch/arm/mach-omap2/clockdomain.c
@@ -472,6 +472,33 @@  int omap2_clkdm_wakeup(struct clockdomain *clkdm)
 	return 0;
 }
 
+/*
+ * omap2_clkdm_get_hwsup - get the hwsup idle transition bit
+ * @clkdm: struct clockdomain *
+ *
+ * Checks whether hardware is allowed to switch the clockdomain
+ * automatically into active or idle states. Returns 1 if yes,
+ * 0 otherwise.
+ */
+int omap2_clkdm_get_hwsup(struct clockdomain *clkdm)
+{
+	u32 v;
+
+	if (cpu_is_omap24xx())
+		v = OMAP24XX_CLKSTCTRL_ENABLE_AUTO;
+	else if (cpu_is_omap34xx())
+		v = OMAP34XX_CLKSTCTRL_ENABLE_AUTO;
+	else
+		BUG();
+
+	if ((cm_read_mod_reg(clkdm->pwrdm.ptr->prcm_offs, CM_CLKSTCTRL) &
+			clkdm->clktrctrl_mask) ==
+			(v << __ffs(clkdm->clktrctrl_mask)))
+		return 1;
+
+	return 0;
+}
+
 /**
  * omap2_clkdm_allow_idle - enable hwsup idle transitions for clkdm
  * @clkdm: struct clockdomain *
diff --git a/arch/arm/plat-omap/include/plat/clockdomain.h b/arch/arm/plat-omap/include/plat/clockdomain.h
index eb73482..9127459 100644
--- a/arch/arm/plat-omap/include/plat/clockdomain.h
+++ b/arch/arm/plat-omap/include/plat/clockdomain.h
@@ -99,6 +99,7 @@  int clkdm_for_each(int (*fn)(struct clockdomain *clkdm, void *user),
 			void *user);
 struct powerdomain *clkdm_get_pwrdm(struct clockdomain *clkdm);
 
+int omap2_clkdm_get_hwsup(struct clockdomain *clkdm);
 void omap2_clkdm_allow_idle(struct clockdomain *clkdm);
 void omap2_clkdm_deny_idle(struct clockdomain *clkdm);