OMAP: powerdomain: Arch specific funcs for state control

Define the following architecture specific funtions for omap2/3/4
.pwrdm_set_next_pwrst
.pwrdm_read_next_pwrst
.pwrdm_read_pwrst
.pwrdm_read_prev_pwrst

Convert the platform-independent framework to call these functions.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
[paul@pwsan.com: remove remaining static allocations in powerdomains.h file;
 remove path in file header comments, rearranged Makefile changes]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoit Cousson <b-cousson@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Reviewed-by: Kevin Hilman <khilman@deeprootsystems.com>
Tested-by: Kevin Hilman <khilman@deeprootsystems.com>
Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Rajendra Nayak <rnayak@ti.com>

arch/arm/mach-omap2/Makefile

@@ -79,7 +79,12 @@ obj-$(CONFIG_ARCH_OMAP4)		+= prcm.o cm4xxx.o
 
 # OMAP powerdomain framework
 powerdomain-common			+= powerdomain.o powerdomains_data.o
-obj-y					+= $(powerdomain-common)
+obj-$(CONFIG_ARCH_OMAP2)		+= $(powerdomain-common) \
+					   powerdomain2xxx_3xxx.o
+obj-$(CONFIG_ARCH_OMAP3)		+= $(powerdomain-common) \
+					   powerdomain2xxx_3xxx.o
+obj-$(CONFIG_ARCH_OMAP4)		+= $(powerdomain-common) \
+					   powerdomain44xx.o
 
 # Clock framework
 obj-$(CONFIG_ARCH_OMAP2)		+= $(clock-common) clock2xxx.o \

arch/arm/mach-omap2/powerdomain.c

@@ -439,6 +439,8 @@ int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm)
  */
 int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst)
 {
+	int ret = -EINVAL;
+
 	if (!pwrdm)
 		return -EINVAL;
 
@@ -448,11 +450,10 @@ int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst)
 	pr_debug("powerdomain: setting next powerstate for %s to %0x\n",
 		 pwrdm->name, pwrst);
 
-	prm_rmw_mod_reg_bits(OMAP_POWERSTATE_MASK,
-			     (pwrst << OMAP_POWERSTATE_SHIFT),
-			     pwrdm->prcm_offs, pwrstctrl_reg_offs);
+	if (arch_pwrdm && arch_pwrdm->pwrdm_set_next_pwrst)
+		ret = arch_pwrdm->pwrdm_set_next_pwrst(pwrdm, pwrst);
 
-	return 0;
+	return ret;
 }
 
 /**
@@ -465,11 +466,15 @@ int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst)
  */
 int pwrdm_read_next_pwrst(struct powerdomain *pwrdm)
 {
+	int ret = -EINVAL;
+
 	if (!pwrdm)
 		return -EINVAL;
 
-	return prm_read_mod_bits_shift(pwrdm->prcm_offs,
-				 pwrstctrl_reg_offs, OMAP_POWERSTATE_MASK);
+	if (arch_pwrdm && arch_pwrdm->pwrdm_read_next_pwrst)
+		ret = arch_pwrdm->pwrdm_read_next_pwrst(pwrdm);
+
+	return ret;
 }
 
 /**
@@ -482,11 +487,15 @@ int pwrdm_read_next_pwrst(struct powerdomain *pwrdm)
  */
 int pwrdm_read_pwrst(struct powerdomain *pwrdm)
 {
+	int ret = -EINVAL;
+
 	if (!pwrdm)
 		return -EINVAL;
 
-	return prm_read_mod_bits_shift(pwrdm->prcm_offs,
-				 pwrstst_reg_offs, OMAP_POWERSTATEST_MASK);
+	if (arch_pwrdm && arch_pwrdm->pwrdm_read_pwrst)
+		ret = arch_pwrdm->pwrdm_read_pwrst(pwrdm);
+
+	return ret;
 }
 
 /**
@@ -499,11 +508,15 @@ int pwrdm_read_pwrst(struct powerdomain *pwrdm)
  */
 int pwrdm_read_prev_pwrst(struct powerdomain *pwrdm)
 {
+	int ret = -EINVAL;
+
 	if (!pwrdm)
 		return -EINVAL;
 
-	return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP3430_PM_PREPWSTST,
-					OMAP3430_LASTPOWERSTATEENTERED_MASK);
+	if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_pwrst)
+		ret = arch_pwrdm->pwrdm_read_prev_pwrst(pwrdm);
+
+	return ret;
 }
 
 /**

arch/arm/mach-omap2/powerdomain2xxx_3xxx.c

@@ -0,0 +1,62 @@
+/*
+ * OMAP2 and OMAP3 powerdomain control
+ *
+ * Copyright (C) 2009-2010 Texas Instruments, Inc.
+ * Copyright (C) 2007-2009 Nokia Corporation
+ *
+ * Derived from mach-omap2/powerdomain.c written by 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
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/io.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <plat/prcm.h>
+#include "prm.h"
+#include "prm-regbits-34xx.h"
+#include "powerdomains.h"
+
+/* Common functions across OMAP2 and OMAP3 */
+static int omap2_pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst)
+{
+	prm_rmw_mod_reg_bits(OMAP_POWERSTATE_MASK,
+				(pwrst << OMAP_POWERSTATE_SHIFT),
+				pwrdm->prcm_offs, OMAP2_PM_PWSTCTRL);
+	return 0;
+}
+
+static int omap2_pwrdm_read_next_pwrst(struct powerdomain *pwrdm)
+{
+	return prm_read_mod_bits_shift(pwrdm->prcm_offs,
+				OMAP2_PM_PWSTCTRL, OMAP_POWERSTATE_MASK);
+}
+
+static int omap2_pwrdm_read_pwrst(struct powerdomain *pwrdm)
+{
+	return prm_read_mod_bits_shift(pwrdm->prcm_offs,
+				OMAP2_PM_PWSTST, OMAP_POWERSTATEST_MASK);
+}
+
+/* Applicable only for OMAP3. Not supported on OMAP2 */
+static int omap3_pwrdm_read_prev_pwrst(struct powerdomain *pwrdm)
+{
+	return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP3430_PM_PREPWSTST,
+				OMAP3430_LASTPOWERSTATEENTERED_MASK);
+}
+
+struct pwrdm_ops omap2_pwrdm_operations = {
+	.pwrdm_set_next_pwrst	= omap2_pwrdm_set_next_pwrst,
+	.pwrdm_read_next_pwrst	= omap2_pwrdm_read_next_pwrst,
+	.pwrdm_read_pwrst	= omap2_pwrdm_read_pwrst,
+};
+
+struct pwrdm_ops omap3_pwrdm_operations = {
+	.pwrdm_set_next_pwrst	= omap2_pwrdm_set_next_pwrst,
+	.pwrdm_read_next_pwrst	= omap2_pwrdm_read_next_pwrst,
+	.pwrdm_read_pwrst	= omap2_pwrdm_read_pwrst,
+	.pwrdm_read_prev_pwrst	= omap3_pwrdm_read_prev_pwrst,
+};

arch/arm/mach-omap2/powerdomain44xx.c

@@ -0,0 +1,55 @@
+/*
+ * OMAP4 powerdomain control
+ *
+ * Copyright (C) 2009-2010 Texas Instruments, Inc.
+ * Copyright (C) 2007-2009 Nokia Corporation
+ *
+ * Derived from mach-omap2/powerdomain.c written by 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
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/io.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <plat/powerdomain.h>
+#include <plat/prcm.h>
+#include "prm.h"
+#include "prm-regbits-44xx.h"
+#include "powerdomains.h"
+
+static int omap4_pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst)
+{
+	prm_rmw_mod_reg_bits(OMAP_POWERSTATE_MASK,
+				(pwrst << OMAP_POWERSTATE_SHIFT),
+				pwrdm->prcm_offs, OMAP4_PM_PWSTCTRL);
+	return 0;
+}
+
+static int omap4_pwrdm_read_next_pwrst(struct powerdomain *pwrdm)
+{
+	return prm_read_mod_bits_shift(pwrdm->prcm_offs,
+				OMAP4_PM_PWSTCTRL, OMAP_POWERSTATE_MASK);
+}
+
+static int omap4_pwrdm_read_pwrst(struct powerdomain *pwrdm)
+{
+	return prm_read_mod_bits_shift(pwrdm->prcm_offs,
+				OMAP4_PM_PWSTST, OMAP_POWERSTATEST_MASK);
+}
+
+static int omap4_pwrdm_read_prev_pwrst(struct powerdomain *pwrdm)
+{
+	return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP4_PM_PWSTST,
+				OMAP4430_LASTPOWERSTATEENTERED_MASK);
+}
+
+struct pwrdm_ops omap4_pwrdm_operations = {
+	.pwrdm_set_next_pwrst	= omap4_pwrdm_set_next_pwrst,
+	.pwrdm_read_next_pwrst	= omap4_pwrdm_read_next_pwrst,
+	.pwrdm_read_pwrst	= omap4_pwrdm_read_pwrst,
+	.pwrdm_read_prev_pwrst	= omap4_pwrdm_read_prev_pwrst,
+};

arch/arm/mach-omap2/powerdomains.h

@@ -0,0 +1,22 @@
+/*
+ * OMAP2+ powerdomain prototypes
+ *
+ * Copyright (C) 2010 Texas Instruments, Inc.
+ *
+ * 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
+ * published by the Free Software Foundation.
+ */
+
+#ifndef ARCH_ARM_MACH_OMAP2_POWERDOMAINS
+#define ARCH_ARM_MACH_OMAP2_POWERDOMAINS
+
+#include <plat/powerdomain.h>
+
+extern struct pwrdm_ops omap2_pwrdm_operations;
+extern struct pwrdm_ops omap3_pwrdm_operations;
+extern struct pwrdm_ops omap4_pwrdm_operations;
+
+#endif /* ARCH_ARM_MACH_OMAP2_POWERDOMAINS */

arch/arm/mach-omap2/powerdomains_data.c

@@ -55,6 +55,7 @@
 #include "powerdomains24xx.h"
 #include "powerdomains34xx.h"
 #include "powerdomains44xx.h"
+#include "powerdomains.h"
 
 /* OMAP2/3-common powerdomains */
 
@@ -149,5 +150,10 @@ static struct powerdomain *powerdomains_omap[] __initdata = {
 
 void pwrdm_fw_init(void)
 {
-	pwrdm_init(powerdomains_omap, NULL);
+	if (cpu_is_omap24xx())
+		pwrdm_init(powerdomains_omap, &omap2_pwrdm_operations);
+	else if (cpu_is_omap34xx())
+		pwrdm_init(powerdomains_omap, &omap3_pwrdm_operations);
+	else if (cpu_is_omap44xx())
+		pwrdm_init(powerdomains_omap, &omap4_pwrdm_operations);
 }