1 files changed, 141 insertions, 1 deletions

diff --git a/arch/arm/mach-omap2/cminst44xx.c b/arch/arm/mach-omap2/cminst44xx.c
index 1894015ff04b..7f9a464f01e9 100644
--- a/arch/arm/mach-omap2/cminst44xx.c
+++ b/arch/arm/mach-omap2/cminst44xx.c
@@ -2,8 +2,9 @@
  * OMAP4 CM instance functions
  *
  * Copyright (C) 2009 Nokia Corporation
- * Copyright (C) 2011 Texas Instruments, Inc.
+ * Copyright (C) 2008-2011 Texas Instruments, Inc.
  * Paul Walmsley
+ * Rajendra Nayak <rnayak@ti.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -22,6 +23,7 @@
 
 #include "iomap.h"
 #include "common.h"
+#include "clockdomain.h"
 #include "cm.h"
 #include "cm1_44xx.h"
 #include "cm2_44xx.h"
@@ -343,3 +345,141 @@ void omap4_cminst_module_disable(u8 part, u16 inst, s16 cdoffs,
         v &= ~OMAP4430_MODULEMODE_MASK;
         omap4_cminst_write_inst_reg(v, part, inst, clkctrl_offs);
 }
+
+/*
+ * Clockdomain low-level functions
+ */
+
+static int omap4_clkdm_add_wkup_sleep_dep(struct clockdomain *clkdm1,
+                                        struct clockdomain *clkdm2)
+{
+        omap4_cminst_set_inst_reg_bits((1 << clkdm2->dep_bit),
+                                       clkdm1->prcm_partition,
+                                       clkdm1->cm_inst, clkdm1->clkdm_offs +
+                                       OMAP4_CM_STATICDEP);
+        return 0;
+}
+
+static int omap4_clkdm_del_wkup_sleep_dep(struct clockdomain *clkdm1,
+                                        struct clockdomain *clkdm2)
+{
+        omap4_cminst_clear_inst_reg_bits((1 << clkdm2->dep_bit),
+                                         clkdm1->prcm_partition,
+                                         clkdm1->cm_inst, clkdm1->clkdm_offs +
+                                         OMAP4_CM_STATICDEP);
+        return 0;
+}
+
+static int omap4_clkdm_read_wkup_sleep_dep(struct clockdomain *clkdm1,
+                                        struct clockdomain *clkdm2)
+{
+        return omap4_cminst_read_inst_reg_bits(clkdm1->prcm_partition,
+                                               clkdm1->cm_inst,
+                                               clkdm1->clkdm_offs +
+                                               OMAP4_CM_STATICDEP,
+                                               (1 << clkdm2->dep_bit));
+}
+
+static int omap4_clkdm_clear_all_wkup_sleep_deps(struct clockdomain *clkdm)
+{
+        struct clkdm_dep *cd;
+        u32 mask = 0;
+
+        if (!clkdm->prcm_partition)
+                return 0;
+
+        for (cd = clkdm->wkdep_srcs; cd && cd->clkdm_name; cd++) {
+                if (!cd->clkdm)
+                        continue; /* only happens if data is erroneous */
+
+                mask |= 1 << cd->clkdm->dep_bit;
+                atomic_set(&cd->wkdep_usecount, 0);
+        }
+
+        omap4_cminst_clear_inst_reg_bits(mask, clkdm->prcm_partition,
+                                         clkdm->cm_inst, clkdm->clkdm_offs +
+                                         OMAP4_CM_STATICDEP);
+        return 0;
+}
+
+static int omap4_clkdm_sleep(struct clockdomain *clkdm)
+{
+        omap4_cminst_clkdm_enable_hwsup(clkdm->prcm_partition,
+                                        clkdm->cm_inst, clkdm->clkdm_offs);
+        return 0;
+}
+
+static int omap4_clkdm_wakeup(struct clockdomain *clkdm)
+{
+        omap4_cminst_clkdm_force_wakeup(clkdm->prcm_partition,
+                                        clkdm->cm_inst, clkdm->clkdm_offs);
+        return 0;
+}
+
+static void omap4_clkdm_allow_idle(struct clockdomain *clkdm)
+{
+        omap4_cminst_clkdm_enable_hwsup(clkdm->prcm_partition,
+                                        clkdm->cm_inst, clkdm->clkdm_offs);
+}
+
+static void omap4_clkdm_deny_idle(struct clockdomain *clkdm)
+{
+        if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP)
+                omap4_clkdm_wakeup(clkdm);
+        else
+                omap4_cminst_clkdm_disable_hwsup(clkdm->prcm_partition,
+                                                 clkdm->cm_inst,
+                                                 clkdm->clkdm_offs);
+}
+
+static int omap4_clkdm_clk_enable(struct clockdomain *clkdm)
+{
+        if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP)
+                return omap4_clkdm_wakeup(clkdm);
+
+        return 0;
+}
+
+static int omap4_clkdm_clk_disable(struct clockdomain *clkdm)
+{
+        bool hwsup = false;
+
+        if (!clkdm->prcm_partition)
+                return 0;
+
+        /*
+         * The CLKDM_MISSING_IDLE_REPORTING flag documentation has
+         * more details on the unpleasant problem this is working
+         * around
+         */
+        if (clkdm->flags & CLKDM_MISSING_IDLE_REPORTING &&
+            !(clkdm->flags & CLKDM_CAN_FORCE_SLEEP)) {
+                omap4_clkdm_allow_idle(clkdm);
+                return 0;
+        }
+
+        hwsup = omap4_cminst_is_clkdm_in_hwsup(clkdm->prcm_partition,
+                                        clkdm->cm_inst, clkdm->clkdm_offs);
+
+        if (!hwsup && (clkdm->flags & CLKDM_CAN_FORCE_SLEEP))
+                omap4_clkdm_sleep(clkdm);
+
+        return 0;
+}
+
+struct clkdm_ops omap4_clkdm_operations = {
+        .clkdm_add_wkdep        = omap4_clkdm_add_wkup_sleep_dep,
+        .clkdm_del_wkdep        = omap4_clkdm_del_wkup_sleep_dep,
+        .clkdm_read_wkdep       = omap4_clkdm_read_wkup_sleep_dep,
+        .clkdm_clear_all_wkdeps = omap4_clkdm_clear_all_wkup_sleep_deps,
+        .clkdm_add_sleepdep     = omap4_clkdm_add_wkup_sleep_dep,
+        .clkdm_del_sleepdep     = omap4_clkdm_del_wkup_sleep_dep,
+        .clkdm_read_sleepdep    = omap4_clkdm_read_wkup_sleep_dep,
+        .clkdm_clear_all_sleepdeps      = omap4_clkdm_clear_all_wkup_sleep_deps,
+        .clkdm_sleep            = omap4_clkdm_sleep,
+        .clkdm_wakeup           = omap4_clkdm_wakeup,
+        .clkdm_allow_idle       = omap4_clkdm_allow_idle,
+        .clkdm_deny_idle        = omap4_clkdm_deny_idle,
+        .clkdm_clk_enable       = omap4_clkdm_clk_enable,
+        .clkdm_clk_disable      = omap4_clkdm_clk_disable,
+};