ARM: OMAP4: PM: Refine the APIs to support OMAP4 features.

The proper Macros have to be used for platform specific calls and
some of the compiling requirements and init calls are taken care of.
Signed-off-by: NAbhijit Pagare <abhijitpagare@ti.com>
Signed-off-by: NPaul Walmsley <paul@pwsan.com>
Cc: Benoit Cousson <b-cousson@ti.com>
Cc: Rajendra Nayak <rnayak@ti.com>

arch/arm/mach-omap2/Makefile

@@ -13,7 +13,7 @@ clock-common				= clock.o clock_common_data.o clockdomain.o
 obj-$(CONFIG_ARCH_OMAP2) += $(omap-2-3-common) $(prcm-common) $(clock-common)
 obj-$(CONFIG_ARCH_OMAP3) += $(omap-2-3-common) $(prcm-common) $(clock-common) \
 			    $(omap-3-4-common)
-obj-$(CONFIG_ARCH_OMAP4) += $(omap-3-4-common) prcm.o clock.o
+obj-$(CONFIG_ARCH_OMAP4) += $(omap-3-4-common) $(prcm-common) clock.o
 
 obj-$(CONFIG_OMAP_MCBSP) += mcbsp.o
 

arch/arm/mach-omap2/io.c

@@ -312,12 +312,12 @@ void __init omap2_init_common_hw(struct omap_sdrc_params *sdrc_cs0,
 	else if (cpu_is_omap34xx())
 		hwmods = omap34xx_hwmods;
 
+	pwrdm_init(powerdomains_omap);
 #ifndef CONFIG_ARCH_OMAP4 /* FIXME: Remove this once the clkdev is ready */
 	/* The OPP tables have to be registered before a clk init */
 	omap_hwmod_init(hwmods);
 	omap2_mux_init();
 	omap_pm_if_early_init(mpu_opps, dsp_opps, l3_opps);
-	pwrdm_init(powerdomains_omap);
 	clkdm_init(clockdomains_omap, clkdm_pwrdm_autodeps);
 #endif
 	omap2_clk_init();

arch/arm/mach-omap2/powerdomain.c

@@ -6,6 +6,8 @@
  *
  * Written by Paul Walmsley
  *
+ * Added OMAP4 specific support by Abhijit Pagare <abhijitpagare@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.
@@ -26,8 +28,10 @@
 
 #include "cm.h"
 #include "cm-regbits-34xx.h"
+#include "cm-regbits-44xx.h"
 #include "prm.h"
 #include "prm-regbits-34xx.h"
+#include "prm-regbits-44xx.h"
 
 #include <plat/cpu.h>
 #include <plat/powerdomain.h>
@@ -40,6 +44,38 @@ enum {
 	PWRDM_STATE_PREV,
 };
 
+/* Variable holding value of the CPU dependent PWRSTCTRL Register Offset */
+static u16 pwrstctrl_reg_offs;
+
+/* Variable holding value of the CPU dependent PWRSTST Register Offset */
+static u16 pwrstst_reg_offs;
+
+/* OMAP3 and OMAP4 specific register bit initialisations
+ * Notice that the names here are not according to each power
+ * domain but the bit mapping used applies to all of them
+ */
+
+/* OMAP3 and OMAP4 Memory Onstate Masks (common across all power domains) */
+#define OMAP_MEM0_ONSTATE_MASK OMAP3430_SHAREDL1CACHEFLATONSTATE_MASK
+#define OMAP_MEM1_ONSTATE_MASK OMAP3430_L1FLATMEMONSTATE_MASK
+#define OMAP_MEM2_ONSTATE_MASK OMAP3430_SHAREDL2CACHEFLATONSTATE_MASK
+#define OMAP_MEM3_ONSTATE_MASK OMAP3430_L2FLATMEMONSTATE_MASK
+#define OMAP_MEM4_ONSTATE_MASK OMAP4430_OCP_NRET_BANK_ONSTATE_MASK
+
+/* OMAP3 and OMAP4 Memory Retstate Masks (common across all power domains) */
+#define OMAP_MEM0_RETSTATE_MASK OMAP3430_SHAREDL1CACHEFLATRETSTATE
+#define OMAP_MEM1_RETSTATE_MASK OMAP3430_L1FLATMEMRETSTATE
+#define OMAP_MEM2_RETSTATE_MASK OMAP3430_SHAREDL2CACHEFLATRETSTATE
+#define OMAP_MEM3_RETSTATE_MASK OMAP3430_L2FLATMEMRETSTATE
+#define OMAP_MEM4_RETSTATE_MASK OMAP4430_OCP_NRET_BANK_RETSTATE_MASK
+
+/* OMAP3 and OMAP4 Memory Status bits */
+#define OMAP_MEM0_STATEST_MASK OMAP3430_SHAREDL1CACHEFLATSTATEST_MASK
+#define OMAP_MEM1_STATEST_MASK OMAP3430_L1FLATMEMSTATEST_MASK
+#define OMAP_MEM2_STATEST_MASK OMAP3430_SHAREDL2CACHEFLATSTATEST_MASK
+#define OMAP_MEM3_STATEST_MASK OMAP3430_L2FLATMEMSTATEST_MASK
+#define OMAP_MEM4_STATEST_MASK OMAP4430_OCP_NRET_BANK_STATEST_MASK
+
 /* pwrdm_list contains all registered struct powerdomains */
 static LIST_HEAD(pwrdm_list);
 
@@ -181,6 +217,18 @@ void pwrdm_init(struct powerdomain **pwrdm_list)
 {
 	struct powerdomain **p = NULL;
 
+	if (cpu_is_omap24xx() | cpu_is_omap34xx()) {
+		pwrstctrl_reg_offs = OMAP2_PM_PWSTCTRL;
+		pwrstst_reg_offs = OMAP2_PM_PWSTST;
+	} else if (cpu_is_omap44xx()) {
+		pwrstctrl_reg_offs = OMAP4_PM_PWSTCTRL;
+		pwrstst_reg_offs = OMAP4_PM_PWSTST;
+	} else {
+		printk(KERN_ERR "Power Domain struct not supported for " \
+							"this CPU\n");
+		return;
+	}
+
 	if (pwrdm_list) {
 		for (p = pwrdm_list; *p; p++) {
 			pwrdm_register(*p);
@@ -710,7 +758,7 @@ int 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);
+			     pwrdm->prcm_offs, pwrstctrl_reg_offs);
 
 	return 0;
 }
@@ -728,8 +776,8 @@ int pwrdm_read_next_pwrst(struct powerdomain *pwrdm)
 	if (!pwrdm)
 		return -EINVAL;
 
-	return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP2_PM_PWSTCTRL,
-					OMAP_POWERSTATE_MASK);
+	return prm_read_mod_bits_shift(pwrdm->prcm_offs,
+				 pwrstctrl_reg_offs, OMAP_POWERSTATE_MASK);
 }
 
 /**
@@ -745,8 +793,8 @@ int pwrdm_read_pwrst(struct powerdomain *pwrdm)
 	if (!pwrdm)
 		return -EINVAL;
 
-	return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP2_PM_PWSTST,
-					OMAP_POWERSTATEST_MASK);
+	return prm_read_mod_bits_shift(pwrdm->prcm_offs,
+				 pwrstst_reg_offs, OMAP_POWERSTATEST_MASK);
 }
 
 /**
@@ -796,7 +844,7 @@ int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst)
 	 */
 	prm_rmw_mod_reg_bits(OMAP3430_LOGICL1CACHERETSTATE,
 			     (pwrst << __ffs(OMAP3430_LOGICL1CACHERETSTATE)),
-			     pwrdm->prcm_offs, OMAP2_PM_PWSTCTRL);
+				 pwrdm->prcm_offs, pwrstctrl_reg_offs);
 
 	return 0;
 }
@@ -839,16 +887,19 @@ int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst)
 	 */
 	switch (bank) {
 	case 0:
-		m = OMAP3430_SHAREDL1CACHEFLATONSTATE_MASK;
+		m = OMAP_MEM0_ONSTATE_MASK;
 		break;
 	case 1:
-		m = OMAP3430_L1FLATMEMONSTATE_MASK;
+		m = OMAP_MEM1_ONSTATE_MASK;
 		break;
 	case 2:
-		m = OMAP3430_SHAREDL2CACHEFLATONSTATE_MASK;
+		m = OMAP_MEM2_ONSTATE_MASK;
 		break;
 	case 3:
-		m = OMAP3430_L2FLATMEMONSTATE_MASK;
+		m = OMAP_MEM3_ONSTATE_MASK;
+		break;
+	case 4:
+		m = OMAP_MEM4_ONSTATE_MASK;
 		break;
 	default:
 		WARN_ON(1); /* should never happen */
@@ -856,7 +907,7 @@ int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst)
 	}
 
 	prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)),
-			     pwrdm->prcm_offs, OMAP2_PM_PWSTCTRL);
+			     pwrdm->prcm_offs, pwrstctrl_reg_offs);
 
 	return 0;
 }
@@ -900,16 +951,19 @@ int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst)
 	 */
 	switch (bank) {
 	case 0:
-		m = OMAP3430_SHAREDL1CACHEFLATRETSTATE;
+		m = OMAP_MEM0_RETSTATE_MASK;
 		break;
 	case 1:
-		m = OMAP3430_L1FLATMEMRETSTATE;
+		m = OMAP_MEM1_RETSTATE_MASK;
 		break;
 	case 2:
-		m = OMAP3430_SHAREDL2CACHEFLATRETSTATE;
+		m = OMAP_MEM2_RETSTATE_MASK;
 		break;
 	case 3:
-		m = OMAP3430_L2FLATMEMRETSTATE;
+		m = OMAP_MEM3_RETSTATE_MASK;
+		break;
+	case 4:
+		m = OMAP_MEM4_RETSTATE_MASK;
 		break;
 	default:
 		WARN_ON(1); /* should never happen */
@@ -917,7 +971,7 @@ int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst)
 	}
 
 	prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)), pwrdm->prcm_offs,
-			     OMAP2_PM_PWSTCTRL);
+			     pwrstctrl_reg_offs);
 
 	return 0;
 }
@@ -936,8 +990,8 @@ int pwrdm_read_logic_pwrst(struct powerdomain *pwrdm)
 	if (!pwrdm)
 		return -EINVAL;
 
-	return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP2_PM_PWSTST,
-					OMAP3430_LOGICSTATEST);
+	return prm_read_mod_bits_shift(pwrdm->prcm_offs,
+				 pwrstst_reg_offs, OMAP3430_LOGICSTATEST);
 }
 
 /**
@@ -994,23 +1048,27 @@ int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
 	 */
 	switch (bank) {
 	case 0:
-		m = OMAP3430_SHAREDL1CACHEFLATSTATEST_MASK;
+		m = OMAP_MEM0_STATEST_MASK;
 		break;
 	case 1:
-		m = OMAP3430_L1FLATMEMSTATEST_MASK;
+		m = OMAP_MEM1_STATEST_MASK;
 		break;
 	case 2:
-		m = OMAP3430_SHAREDL2CACHEFLATSTATEST_MASK;
+		m = OMAP_MEM2_STATEST_MASK;
 		break;
 	case 3:
-		m = OMAP3430_L2FLATMEMSTATEST_MASK;
+		m = OMAP_MEM3_STATEST_MASK;
+		break;
+	case 4:
+		m = OMAP_MEM4_STATEST_MASK;
 		break;
 	default:
 		WARN_ON(1); /* should never happen */
 		return -EEXIST;
 	}
 
-	return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP2_PM_PWSTST, m);
+	return prm_read_mod_bits_shift(pwrdm->prcm_offs,
+					 pwrstst_reg_offs, m);
 }
 
 /**
@@ -1114,7 +1172,7 @@ int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm)
 		 pwrdm->name);
 
 	prm_rmw_mod_reg_bits(0, 1 << OMAP3430ES2_SAVEANDRESTORE_SHIFT,
-			     pwrdm->prcm_offs, OMAP2_PM_PWSTCTRL);
+			     pwrdm->prcm_offs, pwrstctrl_reg_offs);
 
 	return 0;
 }
@@ -1142,7 +1200,7 @@ int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm)
 		 pwrdm->name);
 
 	prm_rmw_mod_reg_bits(1 << OMAP3430ES2_SAVEANDRESTORE_SHIFT, 0,
-			     pwrdm->prcm_offs, OMAP2_PM_PWSTCTRL);
+			     pwrdm->prcm_offs, pwrstctrl_reg_offs);
 
 	return 0;
 }
@@ -1183,10 +1241,10 @@ int pwrdm_wait_transition(struct powerdomain *pwrdm)
 	 */
 
 	/* XXX Is this udelay() value meaningful? */
-	while ((prm_read_mod_reg(pwrdm->prcm_offs, OMAP2_PM_PWSTST) &
+	while ((prm_read_mod_reg(pwrdm->prcm_offs, pwrstst_reg_offs) &
 		OMAP_INTRANSITION) &&
 	       (c++ < PWRDM_TRANSITION_BAILOUT))
-		udelay(1);
+			udelay(1);
 
 	if (c > PWRDM_TRANSITION_BAILOUT) {
 		printk(KERN_ERR "powerdomain: waited too long for "