ARM: OMAP4+: PRM: determine prm_device_inst based on DT compatibility

PRM device instance offset is now provided through the prm_init_data.
This gets rid of some cpu_is_X / soc_is_X calls from PRM core code,
preparing for PRM to be its own separate driver.
Signed-off-by: Tero Kristo <t-kristo@ti.com>

arch/arm/mach-omap2/prcm-common.h

@@ -524,6 +524,7 @@ struct omap_prcm_irq_setup {
  * @mem: IO mem pointer for this module
  * @offset: module base address offset from the IO base
  * @flags: PRCM module init flags
+ * @device_inst_offset: device instance offset within the module address space
  * @init: low level PRCM init function for this module
  * @np: device node for this PRCM module
  */
@@ -532,6 +533,7 @@ struct omap_prcm_init_data {
 	void __iomem *mem;
 	s16 offset;
 	u16 flags;
+	s32 device_inst_offset;
 	int (*init)(const struct omap_prcm_init_data *data);
 	struct device_node *np;
 };

arch/arm/mach-omap2/prm44xx.c

@@ -713,6 +713,8 @@ int __init omap44xx_prm_init(const struct omap_prcm_init_data *data)
 	if (!soc_is_dra7xx())
 		prm_features |= PRM_HAS_VOLTAGE;
 
+	omap4_prminst_set_prm_dev_inst(data->device_inst_offset);
+
 	return prm_register(&omap44xx_prm_ll_data);
 }
 

arch/arm/mach-omap2/prm_common.c

@@ -34,6 +34,9 @@
 #include "prm3xxx.h"
 #include "prm33xx.h"
 #include "prm44xx.h"
+#include "prm54xx.h"
+#include "prm7xx.h"
+#include "prcm43xx.h"
 #include "common.h"
 #include "clock.h"
 #include "cm.h"
@@ -661,11 +664,35 @@ static struct omap_prcm_init_data am3_prm_data __initdata = {
 };
 #endif
 
-#if defined(CONFIG_ARCH_OMAP4) || defined(CONFIG_SOC_OMAP5) || \
-	defined(CONFIG_SOC_DRA7XX) || defined(CONFIG_SOC_AM43XX)
+#ifdef CONFIG_ARCH_OMAP4
 static struct omap_prcm_init_data omap4_prm_data __initdata = {
 	.index = TI_CLKM_PRM,
 	.init = omap44xx_prm_init,
+	.device_inst_offset = OMAP4430_PRM_DEVICE_INST,
+};
+#endif
+
+#ifdef CONFIG_SOC_OMAP5
+static struct omap_prcm_init_data omap5_prm_data __initdata = {
+	.index = TI_CLKM_PRM,
+	.init = omap44xx_prm_init,
+	.device_inst_offset = OMAP54XX_PRM_DEVICE_INST,
+};
+#endif
+
+#ifdef CONFIG_SOC_DRA7XX
+static struct omap_prcm_init_data dra7_prm_data __initdata = {
+	.index = TI_CLKM_PRM,
+	.init = omap44xx_prm_init,
+	.device_inst_offset = DRA7XX_PRM_DEVICE_INST,
+};
+#endif
+
+#ifdef CONFIG_SOC_AM43XX
+static struct omap_prcm_init_data am4_prm_data __initdata = {
+	.index = TI_CLKM_PRM,
+	.init = omap44xx_prm_init,
+	.device_inst_offset = AM43XX_PRM_DEVICE_INST,
 };
 #endif
 
@@ -680,7 +707,7 @@ static const struct of_device_id omap_prcm_dt_match_table[] __initconst = {
 	{ .compatible = "ti,am3-prcm", .data = &am3_prm_data },
 #endif
 #ifdef CONFIG_SOC_AM43XX
-	{ .compatible = "ti,am4-prcm", .data = &omap4_prm_data },
+	{ .compatible = "ti,am4-prcm", .data = &am4_prm_data },
 #endif
 #ifdef CONFIG_SOC_TI81XX
 	{ .compatible = "ti,dm814-prcm", .data = &am3_prm_data },
@@ -697,11 +724,11 @@ static const struct of_device_id omap_prcm_dt_match_table[] __initconst = {
 	{ .compatible = "ti,omap4-scrm", .data = &scrm_data },
 #endif
 #ifdef CONFIG_SOC_OMAP5
-	{ .compatible = "ti,omap5-prm", .data = &omap4_prm_data },
+	{ .compatible = "ti,omap5-prm", .data = &omap5_prm_data },
 	{ .compatible = "ti,omap5-scrm", .data = &scrm_data },
 #endif
 #ifdef CONFIG_SOC_DRA7XX
-	{ .compatible = "ti,dra7-prm", .data = &omap4_prm_data },
+	{ .compatible = "ti,dra7-prm", .data = &dra7_prm_data },
 #endif
 	{ }
 };

arch/arm/mach-omap2/prminst44xx.c

@@ -47,20 +47,12 @@ void omap_prm_base_init(void)
 
 s32 omap4_prmst_get_prm_dev_inst(void)
 {
-	if (prm_dev_inst != PRM_INSTANCE_UNKNOWN)
 	return prm_dev_inst;
+}
 
-	/* This cannot be done way early at boot.. as things are not setup */
-	if (cpu_is_omap44xx())
-		prm_dev_inst = OMAP4430_PRM_DEVICE_INST;
-	else if (soc_is_omap54xx())
-		prm_dev_inst = OMAP54XX_PRM_DEVICE_INST;
-	else if (soc_is_dra7xx())
-		prm_dev_inst = DRA7XX_PRM_DEVICE_INST;
-	else if (soc_is_am43xx())
-		prm_dev_inst = AM43XX_PRM_DEVICE_INST;
-
-	return prm_dev_inst;
+void omap4_prminst_set_prm_dev_inst(s32 dev_inst)
+{
+	prm_dev_inst = dev_inst;
 }
 
 /* Read a register in a PRM instance */

arch/arm/mach-omap2/prminst44xx.h

@@ -14,6 +14,7 @@
 
 #define PRM_INSTANCE_UNKNOWN	-1
 extern s32 omap4_prmst_get_prm_dev_inst(void);
+void omap4_prminst_set_prm_dev_inst(s32 dev_inst);
 
 /*
  * In an ideal world, we would not export these low-level functions,