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);