mach-ux500: voltage domain regulators for DB8500

The DB8500 has ePOD:s (electronic power domains) which are possible
to switch on/off to deactivate silicon blocks on the DB8500 SoC
by cutting their power without retention. We model these as simple
regulators with one bit on/off settings.
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
Signed-off-by: Sundar Iyer <sundar.iyer@stericsson.com>
Signed-off-by: Jonas Aberg <jonas.aberg@stericsson.com>
Signed-off-by: Virupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com>
Signed-off-by: Martin Persson <martin.persson@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/mach-ux500/Kconfig

@@ -17,6 +17,7 @@ config UX500_SOC_DB5500
 config UX500_SOC_DB8500
 	bool "DB8500"
 	select MFD_DB8500_PRCMU
+	select REGULATOR_DB8500_PRCMU
 
 endmenu
 

drivers/mfd/db8500-prcmu.c

@@ -28,6 +28,8 @@
 #include <linux/uaccess.h>
 #include <linux/mfd/core.h>
 #include <linux/mfd/db8500-prcmu.h>
+#include <linux/regulator/db8500-prcmu.h>
+#include <linux/regulator/machine.h>
 #include <mach/hardware.h>
 #include <mach/irqs.h>
 #include <mach/db8500-regs.h>
@@ -1824,9 +1826,186 @@ void __init prcmu_early_init(void)
 	}
 }
 
+/*
+ * Power domain switches (ePODs) modeled as regulators for the DB8500 SoC
+ */
+static struct regulator_consumer_supply db8500_vape_consumers[] = {
+	REGULATOR_SUPPLY("v-ape", NULL),
+	REGULATOR_SUPPLY("v-i2c", "nmk-i2c.0"),
+	REGULATOR_SUPPLY("v-i2c", "nmk-i2c.1"),
+	REGULATOR_SUPPLY("v-i2c", "nmk-i2c.2"),
+	REGULATOR_SUPPLY("v-i2c", "nmk-i2c.3"),
+	/* "v-mmc" changed to "vcore" in the mainline kernel */
+	REGULATOR_SUPPLY("vcore", "sdi0"),
+	REGULATOR_SUPPLY("vcore", "sdi1"),
+	REGULATOR_SUPPLY("vcore", "sdi2"),
+	REGULATOR_SUPPLY("vcore", "sdi3"),
+	REGULATOR_SUPPLY("vcore", "sdi4"),
+	REGULATOR_SUPPLY("v-dma", "dma40.0"),
+	REGULATOR_SUPPLY("v-ape", "ab8500-usb.0"),
+	/* "v-uart" changed to "vcore" in the mainline kernel */
+	REGULATOR_SUPPLY("vcore", "uart0"),
+	REGULATOR_SUPPLY("vcore", "uart1"),
+	REGULATOR_SUPPLY("vcore", "uart2"),
+	REGULATOR_SUPPLY("v-ape", "nmk-ske-keypad.0"),
+};
+
+static struct regulator_consumer_supply db8500_vsmps2_consumers[] = {
+	/* CG2900 and CW1200 power to off-chip peripherals */
+	REGULATOR_SUPPLY("gbf_1v8", "cg2900-uart.0"),
+	REGULATOR_SUPPLY("wlan_1v8", "cw1200.0"),
+	REGULATOR_SUPPLY("musb_1v8", "ab8500-usb.0"),
+	/* AV8100 regulator */
+	REGULATOR_SUPPLY("hdmi_1v8", "0-0070"),
+};
+
+static struct regulator_consumer_supply db8500_b2r2_mcde_consumers[] = {
+	REGULATOR_SUPPLY("vsupply", "b2r2.0"),
+	REGULATOR_SUPPLY("vsupply", "mcde.0"),
+};
+
+static struct regulator_init_data db8500_regulators[DB8500_NUM_REGULATORS] = {
+	[DB8500_REGULATOR_VAPE] = {
+		.constraints = {
+			.name = "db8500-vape",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+		.consumer_supplies = db8500_vape_consumers,
+		.num_consumer_supplies = ARRAY_SIZE(db8500_vape_consumers),
+	},
+	[DB8500_REGULATOR_VARM] = {
+		.constraints = {
+			.name = "db8500-varm",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_VMODEM] = {
+		.constraints = {
+			.name = "db8500-vmodem",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_VPLL] = {
+		.constraints = {
+			.name = "db8500-vpll",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_VSMPS1] = {
+		.constraints = {
+			.name = "db8500-vsmps1",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_VSMPS2] = {
+		.constraints = {
+			.name = "db8500-vsmps2",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+		.consumer_supplies = db8500_vsmps2_consumers,
+		.num_consumer_supplies = ARRAY_SIZE(db8500_vsmps2_consumers),
+	},
+	[DB8500_REGULATOR_VSMPS3] = {
+		.constraints = {
+			.name = "db8500-vsmps3",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_VRF1] = {
+		.constraints = {
+			.name = "db8500-vrf1",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_SWITCH_SVAMMDSP] = {
+		.supply_regulator = "db8500-vape",
+		.constraints = {
+			.name = "db8500-sva-mmdsp",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_SWITCH_SVAMMDSPRET] = {
+		.constraints = {
+			/* "ret" means "retention" */
+			.name = "db8500-sva-mmdsp-ret",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_SWITCH_SVAPIPE] = {
+		.supply_regulator = "db8500-vape",
+		.constraints = {
+			.name = "db8500-sva-pipe",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_SWITCH_SIAMMDSP] = {
+		.supply_regulator = "db8500-vape",
+		.constraints = {
+			.name = "db8500-sia-mmdsp",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_SWITCH_SIAMMDSPRET] = {
+		.constraints = {
+			.name = "db8500-sia-mmdsp-ret",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_SWITCH_SIAPIPE] = {
+		.supply_regulator = "db8500-vape",
+		.constraints = {
+			.name = "db8500-sia-pipe",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_SWITCH_SGA] = {
+		.supply_regulator = "db8500-vape",
+		.constraints = {
+			.name = "db8500-sga",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_SWITCH_B2R2_MCDE] = {
+		.supply_regulator = "db8500-vape",
+		.constraints = {
+			.name = "db8500-b2r2-mcde",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+		.consumer_supplies = db8500_b2r2_mcde_consumers,
+		.num_consumer_supplies = ARRAY_SIZE(db8500_b2r2_mcde_consumers),
+	},
+	[DB8500_REGULATOR_SWITCH_ESRAM12] = {
+		.supply_regulator = "db8500-vape",
+		.constraints = {
+			.name = "db8500-esram12",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_SWITCH_ESRAM12RET] = {
+		.constraints = {
+			.name = "db8500-esram12-ret",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_SWITCH_ESRAM34] = {
+		.supply_regulator = "db8500-vape",
+		.constraints = {
+			.name = "db8500-esram34",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_SWITCH_ESRAM34RET] = {
+		.constraints = {
+			.name = "db8500-esram34-ret",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+};
+
 static struct mfd_cell db8500_prcmu_devs[] = {
 	{
 		.name = "db8500-prcmu-regulators",
+		.mfd_data = &db8500_regulators,
 	},
 	{
 		.name = "cpufreq-u8500",

drivers/regulator/Kconfig

@@ -274,6 +274,13 @@ config REGULATOR_AB8500
 	  This driver supports the regulators found on the ST-Ericsson mixed
 	  signal AB8500 PMIC
 
+config REGULATOR_DB8500_PRCMU
+	bool "ST-Ericsson DB8500 Voltage Domain Regulators"
+	depends on MFD_DB8500_PRCMU
+	help
+	  This driver supports the voltage domain regulators controlled by the
+	  DB8500 PRCMU
+
 config REGULATOR_TPS6586X
 	tristate "TI TPS6586X Power regulators"
 	depends on MFD_TPS6586X

drivers/regulator/Makefile

@@ -41,5 +41,6 @@ obj-$(CONFIG_REGULATOR_TPS6524X) += tps6524x-regulator.o
 obj-$(CONFIG_REGULATOR_88PM8607) += 88pm8607.o
 obj-$(CONFIG_REGULATOR_ISL6271A) += isl6271a-regulator.o
 obj-$(CONFIG_REGULATOR_AB8500)	+= ab8500.o
+obj-$(CONFIG_REGULATOR_DB8500_PRCMU) += db8500-prcmu.o
 
 ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG

include/linux/regulator/db8500-prcmu.h

+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * License Terms: GNU General Public License v2
+ *
+ * Author: Bengt Jonsson <bengt.g.jonsson@stericsson.com> for ST-Ericsson
+ *
+ * Interface to power domain regulators on DB8500
+ */
+
+#ifndef __REGULATOR_H__
+#define __REGULATOR_H__
+
+/* Number of DB8500 regulators and regulator enumeration */
+enum db8500_regulator_id {
+	DB8500_REGULATOR_VAPE,
+	DB8500_REGULATOR_VARM,
+	DB8500_REGULATOR_VMODEM,
+	DB8500_REGULATOR_VPLL,
+	DB8500_REGULATOR_VSMPS1,
+	DB8500_REGULATOR_VSMPS2,
+	DB8500_REGULATOR_VSMPS3,
+	DB8500_REGULATOR_VRF1,
+	DB8500_REGULATOR_SWITCH_SVAMMDSP,
+	DB8500_REGULATOR_SWITCH_SVAMMDSPRET,
+	DB8500_REGULATOR_SWITCH_SVAPIPE,
+	DB8500_REGULATOR_SWITCH_SIAMMDSP,
+	DB8500_REGULATOR_SWITCH_SIAMMDSPRET,
+	DB8500_REGULATOR_SWITCH_SIAPIPE,
+	DB8500_REGULATOR_SWITCH_SGA,
+	DB8500_REGULATOR_SWITCH_B2R2_MCDE,
+	DB8500_REGULATOR_SWITCH_ESRAM12,
+	DB8500_REGULATOR_SWITCH_ESRAM12RET,
+	DB8500_REGULATOR_SWITCH_ESRAM34,
+	DB8500_REGULATOR_SWITCH_ESRAM34RET,
+	DB8500_NUM_REGULATORS
+};
+
+/*
+ * Exported interface for CPUIdle only. This function is called with all
+ * interrupts turned off.
+ */
+int power_state_active_is_enabled(void);
+
+#endif