1 files changed, 70 insertions, 1 deletions

diff --git a/arch/arm/mach-omap2/cm_common.c b/arch/arm/mach-omap2/cm_common.c
index 3246cef151dc..40b3b5a84458 100644
--- a/arch/arm/mach-omap2/cm_common.c
+++ b/arch/arm/mach-omap2/cm_common.c
@@ -2,7 +2,7 @@
  * OMAP2+ common Clock Management (CM) IP block functions
  *
  * Copyright (C) 2012 Texas Instruments, Inc.
- * Paul Walmsley <paul@pwsan.com>
+ * Paul Walmsley
  *
  * 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
@@ -13,10 +13,12 @@
 
 #include <linux/kernel.h>
 #include <linux/init.h>
+#include <linux/errno.h>
 
 #include "cm2xxx.h"
 #include "cm3xxx.h"
 #include "cm44xx.h"
+#include "common.h"
 
 /*
  * cm_ll_data: function pointers to SoC-specific implementations of
@@ -25,6 +27,73 @@
 static struct cm_ll_data null_cm_ll_data;
 static struct cm_ll_data *cm_ll_data = &null_cm_ll_data;
 
+/* cm_base: base virtual address of the CM IP block */
+void __iomem *cm_base;
+
+/* cm2_base: base virtual address of the CM2 IP block (OMAP44xx only) */
+void __iomem *cm2_base;
+
+/**
+ * omap2_set_globals_cm - set the CM/CM2 base addresses (for early use)
+ * @cm: CM base virtual address
+ * @cm2: CM2 base virtual address (if present on the booted SoC)
+ *
+ * XXX Will be replaced when the PRM/CM drivers are completed.
+ */
+void __init omap2_set_globals_cm(void __iomem *cm, void __iomem *cm2)
+{
+        cm_base = cm;
+        cm2_base = cm2;
+}
+
+/**
+ * cm_split_idlest_reg - split CM_IDLEST reg addr into its components
+ * @idlest_reg: CM_IDLEST* virtual address
+ * @prcm_inst: pointer to an s16 to return the PRCM instance offset
+ * @idlest_reg_id: pointer to a u8 to return the CM_IDLESTx register ID
+ *
+ * Given an absolute CM_IDLEST register address @idlest_reg, passes
+ * the PRCM instance offset and IDLEST register ID back to the caller
+ * via the @prcm_inst and @idlest_reg_id.  Returns -EINVAL upon error,
+ * or 0 upon success.  XXX This function is only needed until absolute
+ * register addresses are removed from the OMAP struct clk records.
+ */
+int cm_split_idlest_reg(void __iomem *idlest_reg, s16 *prcm_inst,
+                        u8 *idlest_reg_id)
+{
+        if (!cm_ll_data->split_idlest_reg) {
+                WARN_ONCE(1, "cm: %s: no low-level function defined\n",
+                          __func__);
+                return -EINVAL;
+        }
+
+        return cm_ll_data->split_idlest_reg(idlest_reg, prcm_inst,
+                                           idlest_reg_id);
+}
+
+/**
+ * cm_wait_module_ready - wait for a module to leave idle or standby
+ * @prcm_mod: PRCM module offset
+ * @idlest_id: CM_IDLESTx register ID (i.e., x = 1, 2, 3)
+ * @idlest_shift: shift of the bit in the CM_IDLEST* register to check
+ *
+ * Wait for the PRCM to indicate that the module identified by
+ * (@prcm_mod, @idlest_id, @idlest_shift) is clocked.  Return 0 upon
+ * success, -EBUSY if the module doesn't enable in time, or -EINVAL if
+ * no per-SoC wait_module_ready() function pointer has been registered
+ * or if the idlest register is unknown on the SoC.
+ */
+int cm_wait_module_ready(s16 prcm_mod, u8 idlest_id, u8 idlest_shift)
+{
+        if (!cm_ll_data->wait_module_ready) {
+                WARN_ONCE(1, "cm: %s: no low-level function defined\n",
+                          __func__);
+                return -EINVAL;
+        }
+
+        return cm_ll_data->wait_module_ready(prcm_mod, idlest_id, idlest_shift);
+}
+
 /**
  * cm_register - register per-SoC low-level data with the CM
  * @cld: low-level per-SoC OMAP CM data & function pointers to register