OMAP2+: voltage: start towards a new voltagedomain layer

Start cleaning up the voltage layer to have a voltage domain layer
that resembles the structure of the existing clock and power domain
layers.  To that end:

- move the 'struct voltagedomain' out of 'struct omap_vdd_info' to
  become the primary data structure.

- convert any functions taking a pointer to struct omap_vdd_info into
  functions taking a struct voltagedomain pointer.

- convert the register & initialize of voltage domains to look like
  that of powerdomains

- convert omap_voltage_domain_lookup() to voltdm_lookup(), modeled
  after the current powerdomain and clockdomain lookup functions.

- omap_voltage_late_init(): only configure VDD info when
  the vdd_info struct is non-NULL
Signed-off-by: Kevin Hilman <khilman@ti.com>

arch/arm/mach-omap2/io.c

@@ -38,6 +38,7 @@
 #include "io.h"
 
 #include <plat/omap-pm.h>
+#include "voltage.h"
 #include "powerdomain.h"
 
 #include "clockdomain.h"
@@ -349,10 +350,12 @@ void __init omap2_init_common_infrastructure(void)
 		omap243x_clockdomains_init();
 		omap2430_hwmod_init();
 	} else if (cpu_is_omap34xx()) {
+		omap3xxx_voltagedomains_init();
 		omap3xxx_powerdomains_init();
 		omap3xxx_clockdomains_init();
 		omap3xxx_hwmod_init();
 	} else if (cpu_is_omap44xx()) {
+		omap44xx_voltagedomains_init();
 		omap44xx_powerdomains_init();
 		omap44xx_clockdomains_init();
 		omap44xx_hwmod_init();

arch/arm/mach-omap2/omap_twl.c

@@ -250,13 +250,13 @@ int __init omap4_twl_init(void)
 	if (!cpu_is_omap44xx())
 		return -ENODEV;
 
-	voltdm = omap_voltage_domain_lookup("mpu");
+	voltdm = voltdm_lookup("mpu");
 	omap_voltage_register_pmic(voltdm, &omap4_mpu_volt_info);
 
-	voltdm = omap_voltage_domain_lookup("iva");
+	voltdm = voltdm_lookup("iva");
 	omap_voltage_register_pmic(voltdm, &omap4_iva_volt_info);
 
-	voltdm = omap_voltage_domain_lookup("core");
+	voltdm = voltdm_lookup("core");
 	omap_voltage_register_pmic(voltdm, &omap4_core_volt_info);
 
 	return 0;
@@ -288,10 +288,10 @@ int __init omap3_twl_init(void)
 	if (!twl_sr_enable_autoinit)
 		omap3_twl_set_sr_bit(true);
 
-	voltdm = omap_voltage_domain_lookup("mpu");
+	voltdm = voltdm_lookup("mpu");
 	omap_voltage_register_pmic(voltdm, &omap3_mpu_volt_info);
 
-	voltdm = omap_voltage_domain_lookup("core");
+	voltdm = voltdm_lookup("core");
 	omap_voltage_register_pmic(voltdm, &omap3_core_volt_info);
 
 	return 0;

arch/arm/mach-omap2/pm.c

@@ -181,7 +181,7 @@ static int __init omap2_set_init_voltage(char *vdd_name, char *clk_name,
 		goto exit;
 	}
 
-	voltdm = omap_voltage_domain_lookup(vdd_name);
+	voltdm = voltdm_lookup(vdd_name);
 	if (IS_ERR(voltdm)) {
 		printk(KERN_ERR "%s: Unable to get vdd pointer for vdd_%s\n",
 			__func__, vdd_name);

arch/arm/mach-omap2/sr_device.c

@@ -102,7 +102,7 @@ static int sr_dev_init(struct omap_hwmod *oh, void *user)
 	sr_data->senn_mod = 0x1;
 	sr_data->senp_mod = 0x1;
 
-	sr_data->voltdm = omap_voltage_domain_lookup(oh->vdd_name);
+	sr_data->voltdm = voltdm_lookup(oh->vdd_name);
 	if (IS_ERR(sr_data->voltdm)) {
 		pr_err("%s: Unable to get voltage domain pointer for VDD %s\n",
 			__func__, oh->vdd_name);

arch/arm/mach-omap2/voltage.h

@@ -31,6 +31,8 @@
 #define OMAP3_VOLTOFFSET	0xff
 #define OMAP3_VOLTSETUP2	0xff
 
+struct omap_vdd_info;
+
 /**
  * struct omap_vfsm_instance_data - per-voltage manager FSM register/bitfield
  * data
@@ -50,11 +52,14 @@ struct omap_vfsm_instance_data {
 
 /**
  * struct voltagedomain - omap voltage domain global structure.
- * @name:	Name of the voltage domain which can be used as a unique
- *		identifier.
+ * @name: Name of the voltage domain which can be used as a unique identifier.
+ * @node: list_head linking all voltage domains
+ * @vdd: to be removed
  */
 struct voltagedomain {
 	char *name;
+	struct list_head node;
+	struct omap_vdd_info *vdd;
 };
 
 /**
@@ -116,7 +121,6 @@ struct omap_volt_pmic_info {
  * @vc_data		: structure containing various various vc registers,
  *			  shifts, masks etc.
  * @vfsm                : voltage manager FSM data
- * @voltdm		: pointer to the voltage domain structure
  * @debug_dir		: debug directory for this voltage domain.
  * @curr_volt		: current voltage for this vdd.
  * @prm_irqst_mod       : PRM module id used for PRM IRQ status register access
@@ -130,7 +134,6 @@ struct omap_vdd_info {
 	struct omap_vp_runtime_data vp_rt_data;
 	struct omap_vc_instance_data *vc_data;
 	const struct omap_vfsm_instance_data *vfsm;
-	struct voltagedomain voltdm;
 	struct dentry *debug_dir;
 	u32 curr_volt;
 	bool vp_enabled;
@@ -139,7 +142,7 @@ struct omap_vdd_info {
 	u8 prm_irqst_reg;
 	u32 (*read_reg) (u16 mod, u8 offset);
 	void (*write_reg) (u32 val, u16 mod, u8 offset);
-	int (*volt_scale) (struct omap_vdd_info *vdd,
+	int (*volt_scale) (struct voltagedomain *voltdm,
 		unsigned long target_volt);
 };
 
@@ -155,16 +158,11 @@ struct omap_volt_data *omap_voltage_get_voltdata(struct voltagedomain *voltdm,
 		unsigned long volt);
 unsigned long omap_voltage_get_nom_volt(struct voltagedomain *voltdm);
 struct dentry *omap_voltage_get_dbgdir(struct voltagedomain *voltdm);
-int __init omap_voltage_early_init(struct omap_vdd_info *omap_vdd_array[],
-				   u8 omap_vdd_count);
 #ifdef CONFIG_PM
 int omap_voltage_register_pmic(struct voltagedomain *voltdm,
 		struct omap_volt_pmic_info *pmic_info);
 void omap_change_voltscale_method(struct voltagedomain *voltdm,
 		int voltscale_method);
-/* API to get the voltagedomain pointer */
-struct voltagedomain *omap_voltage_domain_lookup(char *name);
-
 int omap_voltage_late_init(void);
 #else
 static inline int omap_voltage_register_pmic(struct voltagedomain *voltdm,
@@ -178,10 +176,11 @@ static inline int omap_voltage_late_init(void)
 {
 	return -EINVAL;
 }
-static inline struct voltagedomain *omap_voltage_domain_lookup(char *name)
-{
-	return ERR_PTR(-EINVAL);
-}
 #endif
 
+extern void omap3xxx_voltagedomains_init(void);
+extern void omap44xx_voltagedomains_init(void);
+
+struct voltagedomain *voltdm_lookup(const char *name);
+void voltdm_init(struct voltagedomain **voltdm_list);
 #endif

arch/arm/mach-omap2/voltagedomains3xxx_data.c

@@ -43,9 +43,6 @@ static struct omap_vdd_info omap3_vdd1_info = {
 	.vp_data = &omap3_vp1_data,
 	.vc_data = &omap3_vc1_data,
 	.vfsm = &omap3_vdd1_vfsm_data,
-	.voltdm = {
-		.name = "mpu",
-	},
 };
 
 static const struct omap_vfsm_instance_data omap3_vdd2_vfsm_data = {
@@ -60,23 +57,26 @@ static struct omap_vdd_info omap3_vdd2_info = {
 	.vp_data = &omap3_vp2_data,
 	.vc_data = &omap3_vc2_data,
 	.vfsm = &omap3_vdd2_vfsm_data,
-	.voltdm = {
-		.name = "core",
-	},
 };
 
-/* OMAP3 VDD structures */
-static struct omap_vdd_info *omap3_vdd_info[] = {
-	&omap3_vdd1_info,
-	&omap3_vdd2_info,
+static struct voltagedomain omap3_voltdm_mpu = {
+	.name = "mpu",
+	.vdd = &omap3_vdd1_info,
 };
 
-/* OMAP3 specific voltage init functions */
-static int __init omap3xxx_voltage_early_init(void)
-{
-	if (!cpu_is_omap34xx())
-		return 0;
+static struct voltagedomain omap3_voltdm_core = {
+	.name = "core",
+	.vdd = &omap3_vdd2_info,
+};
 
+static struct voltagedomain *voltagedomains_omap3[] __initdata = {
+	&omap3_voltdm_mpu,
+	&omap3_voltdm_core,
+	NULL,
+};
+
+void __init omap3xxx_voltagedomains_init(void)
+{
 	/*
 	 * XXX Will depend on the process, validation, and binning
 	 * for the currently-running IC
@@ -89,7 +89,5 @@ static int __init omap3xxx_voltage_early_init(void)
 		omap3_vdd2_info.volt_data = omap34xx_vddcore_volt_data;
 	}
 
-	return omap_voltage_early_init(omap3_vdd_info,
-				       ARRAY_SIZE(omap3_vdd_info));
+	voltdm_init(voltagedomains_omap3);
 };
-core_initcall(omap3xxx_voltage_early_init);

arch/arm/mach-omap2/voltagedomains44xx_data.c

@@ -42,9 +42,6 @@ static struct omap_vdd_info omap4_vdd_mpu_info = {
 	.vp_data = &omap4_vp_mpu_data,
 	.vc_data = &omap4_vc_mpu_data,
 	.vfsm = &omap4_vdd_mpu_vfsm_data,
-	.voltdm = {
-		.name = "mpu",
-	},
 };
 
 static const struct omap_vfsm_instance_data omap4_vdd_iva_vfsm_data = {
@@ -57,9 +54,6 @@ static struct omap_vdd_info omap4_vdd_iva_info = {
 	.vp_data = &omap4_vp_iva_data,
 	.vc_data = &omap4_vc_iva_data,
 	.vfsm = &omap4_vdd_iva_vfsm_data,
-	.voltdm = {
-		.name = "iva",
-	},
 };
 
 static const struct omap_vfsm_instance_data omap4_vdd_core_vfsm_data = {
@@ -72,24 +66,32 @@ static struct omap_vdd_info omap4_vdd_core_info = {
 	.vp_data = &omap4_vp_core_data,
 	.vc_data = &omap4_vc_core_data,
 	.vfsm = &omap4_vdd_core_vfsm_data,
-	.voltdm = {
-		.name = "core",
-	},
 };
 
-/* OMAP4 VDD structures */
-static struct omap_vdd_info *omap4_vdd_info[] = {
-	&omap4_vdd_mpu_info,
-	&omap4_vdd_iva_info,
-	&omap4_vdd_core_info,
+static struct voltagedomain omap4_voltdm_mpu = {
+	.name = "mpu",
+	.vdd = &omap4_vdd_mpu_info,
 };
 
-/* OMAP4 specific voltage init functions */
-static int __init omap44xx_voltage_early_init(void)
-{
-	if (!cpu_is_omap44xx())
-		return 0;
+static struct voltagedomain omap4_voltdm_iva = {
+	.name = "iva",
+	.vdd = &omap4_vdd_iva_info,
+};
+
+static struct voltagedomain omap4_voltdm_core = {
+	.name = "core",
+	.vdd = &omap4_vdd_core_info,
+};
 
+static struct voltagedomain *voltagedomains_omap4[] __initdata = {
+	&omap4_voltdm_mpu,
+	&omap4_voltdm_iva,
+	&omap4_voltdm_core,
+	NULL,
+};
+
+void __init omap44xx_voltagedomains_init(void)
+{
 	/*
 	 * XXX Will depend on the process, validation, and binning
 	 * for the currently-running IC
@@ -98,7 +100,5 @@ static int __init omap44xx_voltage_early_init(void)
 	omap4_vdd_iva_info.volt_data = omap44xx_vdd_iva_volt_data;
 	omap4_vdd_core_info.volt_data = omap44xx_vdd_core_volt_data;
 
-	return omap_voltage_early_init(omap4_vdd_info,
-				       ARRAY_SIZE(omap4_vdd_info));
+	voltdm_init(voltagedomains_omap4);
 };
-core_initcall(omap44xx_voltage_early_init);