ARM: OMAP2+: CM: move SoC specific init calls within a generic API

This gets rid of need for some exported driver APIs, and simplifies the
initialization of the CM driver. Done in preparation to make CM a
separate driver. The init data is now also passed to the SoC specific
implementations, allowing future expansion to add feature flags etc.

Signed-off-by: Tero Kristo <t-kristo@ti.com>

arch/arm/mach-omap2/cm2xxx.c

@@ -393,9 +393,8 @@ static struct cm_ll_data omap2xxx_cm_ll_data = {
 	.wait_module_ready	= &omap2xxx_cm_wait_module_ready,
 };
 
-int __init omap2xxx_cm_init(void)
+int __init omap2xxx_cm_init(const struct omap_prcm_init_data *data)
 {
-	omap2_cm_base_init();
 	return cm_register(&omap2xxx_cm_ll_data);
 }
 

arch/arm/mach-omap2/cm2xxx.h

@@ -63,7 +63,7 @@ extern u32 omap2xxx_cm_get_core_pll_config(void);
 extern void omap2xxx_cm_set_mod_dividers(u32 mpu, u32 dsp, u32 gfx, u32 core,
 					 u32 mdm);
 
-extern int __init omap2xxx_cm_init(void);
+int __init omap2xxx_cm_init(const struct omap_prcm_init_data *data);
 
 #endif
 

arch/arm/mach-omap2/cm33xx.c

@@ -352,9 +352,8 @@ static struct cm_ll_data am33xx_cm_ll_data = {
 	.module_disable		= &am33xx_cm_module_disable,
 };
 
-int __init am33xx_cm_init(void)
+int __init am33xx_cm_init(const struct omap_prcm_init_data *data)
 {
-	omap2_cm_base_init();
 	return cm_register(&am33xx_cm_ll_data);
 }
 

arch/arm/mach-omap2/cm33xx.h

@@ -19,6 +19,7 @@
 
 #include "cm.h"
 #include "cm-regbits-33xx.h"
+#include "prcm-common.h"
 
 /* CM base address */
 #define AM33XX_CM_BASE		0x44e00000
@@ -374,6 +375,6 @@
 
 
 #ifndef __ASSEMBLER__
-int am33xx_cm_init(void);
+int am33xx_cm_init(const struct omap_prcm_init_data *data);
 #endif /* ASSEMBLER */
 #endif

arch/arm/mach-omap2/cm3xxx.c

@@ -671,10 +671,9 @@ static struct cm_ll_data omap3xxx_cm_ll_data = {
 	.wait_module_ready	= &omap3xxx_cm_wait_module_ready,
 };
 
-int __init omap3xxx_cm_init(void)
+int __init omap3xxx_cm_init(const struct omap_prcm_init_data *data)
 {
 	omap2_clk_legacy_provider_init(TI_CLKM_CM, cm_base + OMAP3430_IVA2_MOD);
-	omap2_cm_base_init();
 	return cm_register(&omap3xxx_cm_ll_data);
 }
 

arch/arm/mach-omap2/cm3xxx.h

@@ -72,7 +72,7 @@ extern void omap3_cm_save_context(void);
 extern void omap3_cm_restore_context(void);
 extern void omap3_cm_save_scratchpad_contents(u32 *ptr);
 
-extern int __init omap3xxx_cm_init(void);
+int __init omap3xxx_cm_init(const struct omap_prcm_init_data *data);
 
 #endif
 

arch/arm/mach-omap2/cm44xx.h

@@ -23,6 +23,6 @@
 #define OMAP4_CM_CLKSTCTRL				0x0000
 #define OMAP4_CM_STATICDEP				0x0004
 
-int omap4_cm_init(void);
+int omap4_cm_init(const struct omap_prcm_init_data *data);
 
 #endif

arch/arm/mach-omap2/cm_common.c

@@ -20,6 +20,7 @@
 
 #include "cm2xxx.h"
 #include "cm3xxx.h"
+#include "cm33xx.h"
 #include "cm44xx.h"
 #include "clock.h"
 
@@ -37,6 +38,7 @@ void __iomem *cm_base;
 void __iomem *cm2_base;
 
 #define CM_NO_CLOCKS		0x1
+#define CM_SINGLE_INSTANCE	0x2
 
 /**
  * omap2_set_globals_cm - set the CM/CM2 base addresses (for early use)
@@ -218,21 +220,32 @@ int cm_unregister(struct cm_ll_data *cld)
 	return 0;
 }
 
-static struct omap_prcm_init_data cm_data = {
+#if defined(CONFIG_ARCH_OMAP4) || defined(CONFIG_SOC_OMAP5) || \
+	defined(CONFIG_SOC_DRA7XX)
+static struct omap_prcm_init_data cm_data __initdata = {
 	.index = TI_CLKM_CM,
+	.init = omap4_cm_init,
 };
 
-static struct omap_prcm_init_data cm2_data = {
+static struct omap_prcm_init_data cm2_data __initdata = {
 	.index = TI_CLKM_CM2,
+	.init = omap4_cm_init,
 };
+#endif
 
-static struct omap_prcm_init_data omap2_prcm_data = {
+#ifdef CONFIG_ARCH_OMAP2
+static struct omap_prcm_init_data omap2_prcm_data __initdata = {
 	.index = TI_CLKM_CM,
-	.flags = CM_NO_CLOCKS,
+	.init = omap2xxx_cm_init,
+	.flags = CM_NO_CLOCKS | CM_SINGLE_INSTANCE,
 };
+#endif
 
-static struct omap_prcm_init_data omap3_cm_data = {
+#ifdef CONFIG_ARCH_OMAP3
+static struct omap_prcm_init_data omap3_cm_data __initdata = {
 	.index = TI_CLKM_CM,
+	.init = omap3xxx_cm_init,
+	.flags = CM_SINGLE_INSTANCE,
 
 	/*
 	 * IVA2 offset is a negative value, must offset the cm_base address
@@ -240,28 +253,53 @@ static struct omap_prcm_init_data omap3_cm_data = {
 	 */
 	.offset = -OMAP3430_IVA2_MOD,
 };
+#endif
 
-static struct omap_prcm_init_data am3_prcm_data = {
+#if defined(CONFIG_SOC_AM33XX) || defined(CONFIG_SOC_TI81XX)
+static struct omap_prcm_init_data am3_prcm_data __initdata = {
 	.index = TI_CLKM_CM,
-	.flags = CM_NO_CLOCKS,
+	.flags = CM_NO_CLOCKS | CM_SINGLE_INSTANCE,
+	.init = am33xx_cm_init,
 };
+#endif
 
-static struct omap_prcm_init_data am4_prcm_data = {
+#ifdef CONFIG_SOC_AM43XX
+static struct omap_prcm_init_data am4_prcm_data __initdata = {
 	.index = TI_CLKM_CM,
-	.flags = CM_NO_CLOCKS,
+	.flags = CM_NO_CLOCKS | CM_SINGLE_INSTANCE,
+	.init = omap4_cm_init,
 };
+#endif
 
-static const struct of_device_id omap_cm_dt_match_table[] = {
+static const struct of_device_id omap_cm_dt_match_table[] __initconst = {
+#ifdef CONFIG_ARCH_OMAP2
 	{ .compatible = "ti,omap2-prcm", .data = &omap2_prcm_data },
+#endif
+#ifdef CONFIG_ARCH_OMAP3
 	{ .compatible = "ti,omap3-cm", .data = &omap3_cm_data },
+#endif
+#ifdef CONFIG_ARCH_OMAP4
 	{ .compatible = "ti,omap4-cm1", .data = &cm_data },
 	{ .compatible = "ti,omap4-cm2", .data = &cm2_data },
+#endif
+#ifdef CONFIG_SOC_OMAP5
 	{ .compatible = "ti,omap5-cm-core-aon", .data = &cm_data },
 	{ .compatible = "ti,omap5-cm-core", .data = &cm2_data },
+#endif
+#ifdef CONFIG_SOC_DRA7XX
 	{ .compatible = "ti,dra7-cm-core-aon", .data = &cm_data },
 	{ .compatible = "ti,dra7-cm-core", .data = &cm2_data },
+#endif
+#ifdef CONFIG_SOC_AM33XX
 	{ .compatible = "ti,am3-prcm", .data = &am3_prcm_data },
+#endif
+#ifdef CONFIG_SOC_AM43XX
 	{ .compatible = "ti,am4-prcm", .data = &am4_prcm_data },
+#endif
+#ifdef CONFIG_SOC_TI81XX
+	{ .compatible = "ti,dm814-prcm", .data = &am3_prcm_data },
+	{ .compatible = "ti,dm816-prcm", .data = &am3_prcm_data },
+#endif
 	{ }
 };
 
@@ -293,6 +331,12 @@ int __init omap2_cm_base_init(void)
 			cm2_base = mem + data->offset;
 
 		data->mem = mem;
+
+		data->np = np;
+
+		if (data->init && (data->flags & CM_SINGLE_INSTANCE ||
+				   (cm_base && cm2_base)))
+			data->init(data);
 	}
 
 	return 0;

arch/arm/mach-omap2/cminst44xx.c

@@ -514,9 +514,8 @@ static struct cm_ll_data omap4xxx_cm_ll_data = {
 	.module_disable		= &omap4_cminst_module_disable,
 };
 
-int __init omap4_cm_init(void)
+int __init omap4_cm_init(const struct omap_prcm_init_data *data)
 {
-	omap2_cm_base_init();
 	omap_cm_base_init();
 
 	return cm_register(&omap4xxx_cm_ll_data);

arch/arm/mach-omap2/io.c

@@ -387,7 +387,6 @@ void __init omap2420_init_early(void)
 	omap2_control_base_init();
 	omap2xxx_check_revision();
 	omap2_prcm_base_init();
-	omap2xxx_cm_init();
 	omap2xxx_voltagedomains_init();
 	omap242x_powerdomains_init();
 	omap242x_clockdomains_init();
@@ -414,7 +413,6 @@ void __init omap2430_init_early(void)
 	omap2_control_base_init();
 	omap2xxx_check_revision();
 	omap2_prcm_base_init();
-	omap2xxx_cm_init();
 	omap2xxx_voltagedomains_init();
 	omap243x_powerdomains_init();
 	omap243x_clockdomains_init();
@@ -454,8 +452,11 @@ void __init omap3_init_early(void)
 	omap3xxx_check_revision();
 	omap3xxx_check_features();
 	omap2_prcm_base_init();
-	omap3xxx_prm_init(NULL);
-	omap3xxx_cm_init();
+	/* XXX: remove these once OMAP3 is DT only */
+	if (!of_have_populated_dt()) {
+		omap3xxx_prm_init(NULL);
+		omap3xxx_cm_init(NULL);
+	}
 	omap3xxx_voltagedomains_init();
 	omap3xxx_powerdomains_init();
 	omap3xxx_clockdomains_init();
@@ -553,7 +554,6 @@ void __init ti814x_init_early(void)
 	omap3xxx_check_revision();
 	ti81xx_check_features();
 	omap2_prcm_base_init();
-	am33xx_cm_init();
 	omap3xxx_voltagedomains_init();
 	omap3xxx_powerdomains_init();
 	ti81xx_clockdomains_init();
@@ -571,7 +571,6 @@ void __init ti816x_init_early(void)
 	omap3xxx_check_revision();
 	ti81xx_check_features();
 	omap2_prcm_base_init();
-	am33xx_cm_init();
 	omap3xxx_voltagedomains_init();
 	omap3xxx_powerdomains_init();
 	ti81xx_clockdomains_init();
@@ -591,7 +590,6 @@ void __init am33xx_init_early(void)
 	omap3xxx_check_revision();
 	am33xx_check_features();
 	omap2_prcm_base_init();
-	am33xx_cm_init();
 	am33xx_powerdomains_init();
 	am33xx_clockdomains_init();
 	am33xx_hwmod_init();
@@ -614,7 +612,6 @@ void __init am43xx_init_early(void)
 	omap3xxx_check_revision();
 	am33xx_check_features();
 	omap2_prcm_base_init();
-	omap4_cm_init();
 	am43xx_powerdomains_init();
 	am43xx_clockdomains_init();
 	am43xx_hwmod_init();
@@ -640,7 +637,6 @@ void __init omap4430_init_early(void)
 	omap4xxx_check_revision();
 	omap4xxx_check_features();
 	omap2_prcm_base_init();
-	omap4_cm_init();
 	omap4_pm_init_early();
 	omap44xx_voltagedomains_init();
 	omap44xx_powerdomains_init();
@@ -670,7 +666,6 @@ void __init omap5_init_early(void)
 	omap4_pm_init_early();
 	omap2_prcm_base_init();
 	omap5xxx_check_revision();
-	omap4_cm_init();
 	omap54xx_voltagedomains_init();
 	omap54xx_powerdomains_init();
 	omap54xx_clockdomains_init();
@@ -697,7 +692,6 @@ void __init dra7xx_init_early(void)
 	omap4_pm_init_early();
 	omap2_prcm_base_init();
 	dra7xxx_check_revision();
-	omap4_cm_init();
 	dra7xx_powerdomains_init();
 	dra7xx_clockdomains_init();
 	dra7xx_hwmod_init();

arch/arm/mach-omap2/prm_common.c

@@ -770,7 +770,13 @@ int __init omap2_prm_base_init(void)
 
 int __init omap2_prcm_base_init(void)
 {
-	return omap2_prm_base_init();
+	int ret;
+
+	ret = omap2_prm_base_init();
+	if (ret)
+		return ret;
+
+	return omap2_cm_base_init();
 }
 
 /**