[PATCH 0/3] MFD: TWL4030: Support for dynamic power switching

[PATCH 0/3] MFD: TWL4030: Support for dynamic power switching

[Amit Kucheria]

From: Amit Kucheria <amit.kucheria@verdurent.com>

The TWL4030/5030 family of multifunction devices allow dynamic power
switching based on board-specific applications through power 'scripts'.

Add board-independent core support for this feature and add support for
the RX51 board based on OMAP3.

Amit Kucheria (3):
  MFD: TWL4030: Add support for TWL4030/5030 dynamic power switching
  MFD: TWL4030: print warning for out-of-order script loading
  MFD: TWL4030: OMAP: Board-specifc DPS scripts for RX51 board

 arch/arm/mach-omap2/board-rx51-peripherals.c |  122 +++++++-
 drivers/mfd/Kconfig                          |   13 +
 drivers/mfd/Makefile                         |    1 +
 drivers/mfd/twl4030-core.c                   |   10 +
 drivers/mfd/twl4030-power.c                  |  472 ++++++++++++++++++++++++++
 include/linux/i2c/twl4030.h                  |   94 +++++-
 6 files changed, 700 insertions(+), 12 deletions(-)
 create mode 100644 drivers/mfd/twl4030-power.c

[PATCH 1/3] MFD: TWL4030: Add support for TWL4030/5030 dynamic power switching

[Amit Kucheria]

The TWL4030/5030 family of multifunction devices allows board-specific
control of the the various regulators, clock and reset lines through
'scripts' that are loaded into its memory. This allows for Dynamic Power
Switching (DPS).

Implement board-independent core support for DPS that is then used by
board-specific code to load custom DPS scripts.

Signed-off-by: Amit Kucheria <amit.kucheria@verdurent.com>
Cc: sameo@linux.intel.com
Cc: dbrownell@users.sourceforge.net
Cc: linux-omap@vger.kernel.org
---
 drivers/mfd/Kconfig         |   13 ++
 drivers/mfd/Makefile        |    1 +
 drivers/mfd/twl4030-core.c  |   10 +
 drivers/mfd/twl4030-power.c |  466 +++++++++++++++++++++++++++++++++++++++++++
 include/linux/i2c/twl4030.h |   94 ++++++++-
 5 files changed, 574 insertions(+), 10 deletions(-)
 create mode 100644 drivers/mfd/twl4030-power.c

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 491ac0f..94fa9a0 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -108,6 +108,19 @@ config TWL4030_CORE
 	  high speed USB OTG transceiver, an audio codec (on most
 	  versions) and many other features.
 
+config TWL4030_POWER
+	bool "Support power resources on TWL4030 family chips"
+	depends on TWL4030_CORE
+	help
+	  Say yes here if you want to use the power resources on the
+	  TWL4030 family chips.  Most of these resources are regulators,
+	  which have a separate driver; some are control signals, such
+	  as clock request handshaking.
+
+	  This driver uses board-specific data to initialize the resources
+	  and load scripts controling which resources are switched off/on
+	  or reset when a sleep, wakeup or warm reset event occurs.
+
 config MFD_TMIO
 	bool
 	default n
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 6f8a9a1..84b9eda 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -23,6 +23,7 @@ obj-$(CONFIG_TPS65010)		+= tps65010.o
 obj-$(CONFIG_MENELAUS)		+= menelaus.o
 
 obj-$(CONFIG_TWL4030_CORE)	+= twl4030-core.o twl4030-irq.o
+obj-$(CONFIG_TWL4030_POWER)    += twl4030-power.o
 
 obj-$(CONFIG_MFD_CORE)		+= mfd-core.o
 
diff --git a/drivers/mfd/twl4030-core.c b/drivers/mfd/twl4030-core.c
index ca54996..28a45a3 100644
--- a/drivers/mfd/twl4030-core.c
+++ b/drivers/mfd/twl4030-core.c
@@ -89,6 +89,12 @@
 #define twl_has_madc()	false
 #endif
 
+#ifdef CONFIG_TWL4030_POWER
+#define twl_has_power()        true
+#else
+#define twl_has_power()        false
+#endif
+
 #if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
 #define twl_has_rtc()	true
 #else
@@ -788,6 +794,10 @@ twl4030_probe(struct i2c_client *client, const struct i2c_device_id *id)
 	/* setup clock framework */
 	clocks_init(&client->dev);
 
+	/* load power event scripts */
+	if (twl_has_power() && pdata->power)
+		twl4030_power_init(pdata->power);
+
 	/* Maybe init the T2 Interrupt subsystem */
 	if (client->irq
 			&& pdata->irq_base
diff --git a/drivers/mfd/twl4030-power.c b/drivers/mfd/twl4030-power.c
new file mode 100644
index 0000000..e7688b0
--- /dev/null
+++ b/drivers/mfd/twl4030-power.c
@@ -0,0 +1,466 @@
+/*
+ * linux/drivers/i2c/chips/twl4030-power.c
+ *
+ * Handle TWL4030 Power initialization
+ *
+ * Copyright (C) 2008 Nokia Corporation
+ * Copyright (C) 2006 Texas Instruments, Inc
+ *
+ * Written by 	Kalle Jokiniemi
+ *		Peter De Schrijver <peter.de-schrijver@nokia.com>
+ * Several fixes by Amit Kucheria <amit.kucheria@verdurent.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License. See the file "COPYING" in the main directory of this
+ * archive for more details.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/module.h>
+#include <linux/pm.h>
+#include <linux/i2c/twl4030.h>
+#include <linux/platform_device.h>
+
+#include <asm/mach-types.h>
+
+static u8 twl4030_start_script_address = 0x2b;
+
+#define PWR_P1_SW_EVENTS	0x10
+#define PWR_DEVOFF	(1<<0)
+
+#define PHY_TO_OFF_PM_MASTER(p)		(p - 0x36)
+#define PHY_TO_OFF_PM_RECEIVER(p)	(p - 0x5b)
+
+/* resource - hfclk */
+#define R_HFCLKOUT_DEV_GRP 	PHY_TO_OFF_PM_RECEIVER(0xe6)
+
+/* PM events */
+#define R_P1_SW_EVENTS		PHY_TO_OFF_PM_MASTER(0x46)
+#define R_P2_SW_EVENTS		PHY_TO_OFF_PM_MASTER(0x47)
+#define R_P3_SW_EVENTS		PHY_TO_OFF_PM_MASTER(0x48)
+#define R_CFG_P1_TRANSITION	PHY_TO_OFF_PM_MASTER(0x36)
+#define R_CFG_P2_TRANSITION	PHY_TO_OFF_PM_MASTER(0x37)
+#define R_CFG_P3_TRANSITION	PHY_TO_OFF_PM_MASTER(0x38)
+
+#define LVL_WAKEUP	0x08
+
+#define ENABLE_WARMRESET (1<<4)
+
+#define END_OF_SCRIPT		0x3f
+
+#define R_SEQ_ADD_A2S		PHY_TO_OFF_PM_MASTER(0x55)
+#define R_SEQ_ADD_S2A12		PHY_TO_OFF_PM_MASTER(0x56)
+#define	R_SEQ_ADD_S2A3		PHY_TO_OFF_PM_MASTER(0x57)
+#define	R_SEQ_ADD_WARM		PHY_TO_OFF_PM_MASTER(0x58)
+#define R_MEMORY_ADDRESS	PHY_TO_OFF_PM_MASTER(0x59)
+#define R_MEMORY_DATA		PHY_TO_OFF_PM_MASTER(0x5a)
+
+#define R_PROTECT_KEY		0x0E
+#define KEY_1			0xC0
+#define KEY_2			0x0C
+
+/* resource configuration registers */
+
+#define DEVGROUP_OFFSET		0
+#define TYPE_OFFSET		1
+
+/* Bit positions */
+#define DEVGROUP_SHIFT		5
+#define DEVGROUP_MASK		(7 << DEVGROUP_SHIFT)
+#define TYPE_SHIFT		0
+#define TYPE_MASK		(7 << TYPE_SHIFT)
+#define TYPE2_SHIFT		3
+#define TYPE2_MASK		(3 << TYPE2_SHIFT)
+
+static u8 res_config_addrs[] = {
+	[RES_VAUX1]	= 0x17,
+	[RES_VAUX2]	= 0x1b,
+	[RES_VAUX3]	= 0x1f,
+	[RES_VAUX4]	= 0x23,
+	[RES_VMMC1]	= 0x27,
+	[RES_VMMC2]	= 0x2b,
+	[RES_VPLL1]	= 0x2f,
+	[RES_VPLL2]	= 0x33,
+	[RES_VSIM]	= 0x37,
+	[RES_VDAC]	= 0x3b,
+	[RES_VINTANA1]	= 0x3f,
+	[RES_VINTANA2]	= 0x43,
+	[RES_VINTDIG]	= 0x47,
+	[RES_VIO]	= 0x4b,
+	[RES_VDD1]	= 0x55,
+	[RES_VDD2]	= 0x63,
+	[RES_VUSB_1V5]	= 0x71,
+	[RES_VUSB_1V8]	= 0x74,
+	[RES_VUSB_3V1]	= 0x77,
+	[RES_VUSBCP]	= 0x7a,
+	[RES_REGEN]	= 0x7f,
+	[RES_NRES_PWRON] = 0x82,
+	[RES_CLKEN]	= 0x85,
+	[RES_SYSEN]	= 0x88,
+	[RES_HFCLKOUT]	= 0x8b,
+	[RES_32KCLKOUT]	= 0x8e,
+	[RES_RESET]	= 0x91,
+	[RES_Main_Ref]	= 0x94,
+};
+
+static int __init twl4030_write_script_byte(u8 address, u8 byte)
+{
+	int err;
+
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
+				R_MEMORY_ADDRESS);
+	if (err)
+		goto out;
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, byte,
+				R_MEMORY_DATA);
+out:
+	return err;
+}
+
+static int __init twl4030_write_script_ins(u8 address, u16 pmb_message,
+					   u8 delay, u8 next)
+{
+	int err;
+
+	address *= 4;
+	err = twl4030_write_script_byte(address++, pmb_message >> 8);
+	if (err)
+		goto out;
+	err = twl4030_write_script_byte(address++, pmb_message & 0xff);
+	if (err)
+		goto out;
+	err = twl4030_write_script_byte(address++, delay);
+	if (err)
+		goto out;
+	err = twl4030_write_script_byte(address++, next);
+out:
+	return err;
+}
+
+static int __init twl4030_write_script(u8 address, struct twl4030_ins *script,
+				       int len)
+{
+	int err;
+
+	for (; len; len--, address++, script++) {
+		if (len == 1) {
+			err = twl4030_write_script_ins(address,
+						script->pmb_message,
+						script->delay,
+						END_OF_SCRIPT);
+			if (err)
+				break;
+		} else {
+			err = twl4030_write_script_ins(address,
+						script->pmb_message,
+						script->delay,
+						address + 1);
+			if (err)
+				break;
+		}
+	}
+	return err;
+}
+
+static int __init twl4030_config_wakeup3_sequence(u8 address)
+{
+	int err;
+	u8 data;
+
+	/* Set SLEEP to ACTIVE SEQ address for P3 */
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
+				R_SEQ_ADD_S2A3);
+	if (err)
+		goto out;
+
+	/* P3 LVL_WAKEUP should be on LEVEL */
+	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data,
+				R_P3_SW_EVENTS);
+	if (err)
+		goto out;
+	data |= LVL_WAKEUP;
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data,
+				R_P3_SW_EVENTS);
+out:
+	if (err)
+		pr_err("TWL4030 wakeup sequence for P3 config error\n");
+	return err;
+}
+
+static int __init twl4030_config_wakeup12_sequence(u8 address)
+{
+	int err = 0;
+	u8 data;
+
+	/* Set SLEEP to ACTIVE SEQ address for P1 and P2 */
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
+				R_SEQ_ADD_S2A12);
+	if (err)
+		goto out;
+
+	/* P1/P2 LVL_WAKEUP should be on LEVEL */
+	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data,
+				R_P1_SW_EVENTS);
+	if (err)
+		goto out;
+
+	data |= LVL_WAKEUP;
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data,
+				R_P1_SW_EVENTS);
+	if (err)
+		goto out;
+
+	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data,
+				R_P2_SW_EVENTS);
+	if (err)
+		goto out;
+
+	data |= LVL_WAKEUP;
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data,
+				R_P2_SW_EVENTS);
+	if (err)
+		goto out;
+
+	if (machine_is_omap_3430sdp() || machine_is_omap_ldp()) {
+		/* Disabling AC charger effect on sleep-active transitions */
+		err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data,
+					R_CFG_P1_TRANSITION);
+		if (err)
+			goto out;
+		data &= ~(1<<1);
+		err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data ,
+					R_CFG_P1_TRANSITION);
+		if (err)
+			goto out;
+	}
+
+out:
+	if (err)
+		pr_err("TWL4030 wakeup sequence for P1 and P2" \
+			"config error\n");
+	return err;
+}
+
+static int __init twl4030_config_sleep_sequence(u8 address)
+{
+	int err;
+
+	/* Set ACTIVE to SLEEP SEQ address in T2 memory*/
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
+				R_SEQ_ADD_A2S);
+
+	if (err)
+		pr_err("TWL4030 sleep sequence config error\n");
+
+	return err;
+}
+
+static int __init twl4030_config_warmreset_sequence(u8 address)
+{
+	int err;
+	u8 rd_data;
+
+	/* Set WARM RESET SEQ address for P1 */
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
+				R_SEQ_ADD_WARM);
+	if (err)
+		goto out;
+
+	/* P1/P2/P3 enable WARMRESET */
+	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &rd_data,
+				R_P1_SW_EVENTS);
+	if (err)
+		goto out;
+
+	rd_data |= ENABLE_WARMRESET;
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, rd_data,
+				R_P1_SW_EVENTS);
+	if (err)
+		goto out;
+
+	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &rd_data,
+				R_P2_SW_EVENTS);
+	if (err)
+		goto out;
+
+	rd_data |= ENABLE_WARMRESET;
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, rd_data,
+				R_P2_SW_EVENTS);
+	if (err)
+		goto out;
+
+	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &rd_data,
+				R_P3_SW_EVENTS);
+	if (err)
+		goto out;
+
+	rd_data |= ENABLE_WARMRESET;
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, rd_data,
+				R_P3_SW_EVENTS);
+out:
+	if (err)
+		pr_err("TWL4030 warmreset seq config error\n");
+	return err;
+}
+
+static int __init twl4030_configure_resource(struct twl4030_resconfig *rconfig)
+{
+	int rconfig_addr;
+	int err;
+	u8 type;
+	u8 grp;
+
+	if (rconfig->resource > TOTAL_RESOURCES) {
+		pr_err("TWL4030 Resource %d does not exist\n",
+			rconfig->resource);
+		return -EINVAL;
+	}
+
+	rconfig_addr = res_config_addrs[rconfig->resource];
+
+	/* Set resource group */
+	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &grp,
+				rconfig_addr + DEVGROUP_OFFSET);
+	if (err) {
+		pr_err("TWL4030 Resource %d group could not be read\n",
+			rconfig->resource);
+		return err;
+	}
+
+	if (rconfig->devgroup >= 0) {
+		grp &= ~DEVGROUP_MASK;
+		grp |= rconfig->devgroup << DEVGROUP_SHIFT;
+		err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
+					grp, rconfig_addr + DEVGROUP_OFFSET);
+		if (err < 0) {
+			pr_err("TWL4030 failed to program devgroup\n");
+			return err;
+		}
+	}
+
+	/* Set resource types */
+	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &type,
+				rconfig_addr + TYPE_OFFSET);
+	if (err < 0) {
+		pr_err("TWL4030 Resource %d type could not be read\n",
+			rconfig->resource);
+		return err;
+	}
+
+	if (rconfig->type >= 0) {
+		type &= ~TYPE_MASK;
+		type |= rconfig->type << TYPE_SHIFT;
+	}
+
+	if (rconfig->type2 >= 0) {
+		type &= ~TYPE2_MASK;
+		type |= rconfig->type2 << TYPE2_SHIFT;
+	}
+
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
+				type, rconfig_addr + TYPE_OFFSET);
+	if (err < 0) {
+		pr_err("TWL4030 failed to program resource type\n");
+		return err;
+	}
+
+	return 0;
+}
+
+static int __init load_twl4030_script(struct twl4030_script *tscript,
+	       u8 address)
+{
+	int err;
+
+	/* Make sure the script isn't going beyond last valid address (0x3f) */
+	if ((address + tscript->size) > END_OF_SCRIPT) {
+		pr_err("TWL4030 scripts too big error\n");
+		return -EINVAL;
+	}
+
+	err = twl4030_write_script(address, tscript->script, tscript->size);
+	if (err)
+		goto out;
+
+	if (tscript->flags & TWL4030_WRST_SCRIPT) {
+		err = twl4030_config_warmreset_sequence(address);
+		if (err)
+			goto out;
+	}
+	if (tscript->flags & TWL4030_WAKEUP12_SCRIPT) {
+		err = twl4030_config_wakeup12_sequence(address);
+		if (err)
+			goto out;
+	}
+	if (tscript->flags & TWL4030_WAKEUP3_SCRIPT) {
+		err = twl4030_config_wakeup3_sequence(address);
+		if (err)
+			goto out;
+	}
+	if (tscript->flags & TWL4030_SLEEP_SCRIPT)
+		err = twl4030_config_sleep_sequence(address);
+out:
+	return err;
+}
+
+void __init twl4030_power_init(struct twl4030_power_data *twl4030_scripts)
+{
+	int err = 0;
+	int i;
+	struct twl4030_resconfig *resconfig;
+	u8 address = twl4030_start_script_address;
+
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_1,
+				R_PROTECT_KEY);
+	if (err)
+		goto unlock;
+
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_2,
+				R_PROTECT_KEY);
+	if (err)
+		goto unlock;
+
+	for (i = 0; i < twl4030_scripts->num; i++) {
+		err = load_twl4030_script(twl4030_scripts->scripts[i], address);
+		if (err)
+			goto load;
+		address += twl4030_scripts->scripts[i]->size;
+	}
+
+	resconfig = twl4030_scripts->resource_config;
+	if (resconfig) {
+		while (resconfig->resource) {
+			err = twl4030_configure_resource(resconfig);
+			if (err)
+				goto resource;
+			resconfig++;
+
+		}
+	}
+
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0, R_PROTECT_KEY);
+	if (err)
+		pr_err("TWL4030 Unable to relock registers\n");
+	return;
+
+unlock:
+	if (err)
+		pr_err("TWL4030 Unable to unlock registers\n");
+	return;
+load:
+	if (err)
+		pr_err("TWL4030 failed to load scripts\n");
+	return;
+resource:
+	if (err)
+		pr_err("TWL4030 failed to configure resource\n");
+	return;
+}
diff --git a/include/linux/i2c/twl4030.h b/include/linux/i2c/twl4030.h
index 0dc80ef..d0c24ad 100644
--- a/include/linux/i2c/twl4030.h
+++ b/include/linux/i2c/twl4030.h
@@ -220,19 +220,28 @@ int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes);
 
 /* Power bus message definitions */
 
-#define DEV_GRP_NULL		0x0
-#define DEV_GRP_P1		0x1
-#define DEV_GRP_P2		0x2
-#define DEV_GRP_P3		0x4
+/* The TWL4030/5030 splits its power-management resources (the various
+ * regulators, clock and reset lines) into 3 processor groups - P1, P2 and
+ * P3. These groups can then be configured to transition between sleep, wait-on
+ * and active states by sending messages to the power bus.  See Section 5.4.2
+ * Power Resources of TWL4030 TRM
+ */
 
-#define RES_GRP_RES		0x0
-#define RES_GRP_PP		0x1
-#define RES_GRP_RC		0x2
+/* Processor groups */
+#define DEV_GRP_NULL		0x0
+#define DEV_GRP_P1		0x1	/* P1: all OMAP devices */
+#define DEV_GRP_P2		0x2	/* P2: all Modem devices */
+#define DEV_GRP_P3		0x4	/* P3: all peripheral devices */
+
+/* Resource groups */
+#define RES_GRP_RES		0x0	/* Reserved */
+#define RES_GRP_PP		0x1	/* Power providers */
+#define RES_GRP_RC		0x2	/* Reset and control */
 #define RES_GRP_PP_RC		0x3
-#define RES_GRP_PR		0x4
+#define RES_GRP_PR		0x4	/* Power references */
 #define RES_GRP_PP_PR		0x5
 #define RES_GRP_RC_PR		0x6
-#define RES_GRP_ALL		0x7
+#define RES_GRP_ALL		0x7	/* All resource groups */
 
 #define RES_TYPE2_R0		0x0
 
@@ -243,6 +252,41 @@ int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes);
 #define RES_STATE_SLEEP		0x8
 #define RES_STATE_OFF		0x0
 
+/* Power resources */
+
+/* Power providers */
+#define RES_VAUX1               1
+#define RES_VAUX2               2
+#define RES_VAUX3               3
+#define RES_VAUX4               4
+#define RES_VMMC1               5
+#define RES_VMMC2               6
+#define RES_VPLL1               7
+#define RES_VPLL2               8
+#define RES_VSIM                9
+#define RES_VDAC                10
+#define RES_VINTANA1            11
+#define RES_VINTANA2            12
+#define RES_VINTDIG             13
+#define RES_VIO                 14
+#define RES_VDD1                15
+#define RES_VDD2                16
+#define RES_VUSB_1V5            17
+#define RES_VUSB_1V8            18
+#define RES_VUSB_3V1            19
+#define RES_VUSBCP              20
+#define RES_REGEN               21
+/* Reset and control */
+#define RES_NRES_PWRON          22
+#define RES_CLKEN               23
+#define RES_SYSEN               24
+#define RES_HFCLKOUT            25
+#define RES_32KCLKOUT           26
+#define RES_RESET               27
+/* Power Reference */
+#define RES_Main_Ref            28
+
+#define TOTAL_RESOURCES		28
 /*
  * Power Bus Message Format ... these can be sent individually by Linux,
  * but are usually part of downloaded scripts that are run when various
@@ -320,6 +364,36 @@ struct twl4030_usb_data {
 	enum twl4030_usb_mode	usb_mode;
 };
 
+struct twl4030_ins {
+	u16 pmb_message;
+	u8 delay;
+};
+
+struct twl4030_script {
+	struct twl4030_ins *script;
+	unsigned size;
+	u8 flags;
+#define TWL4030_WRST_SCRIPT	(1<<0)
+#define TWL4030_WAKEUP12_SCRIPT	(1<<1)
+#define TWL4030_WAKEUP3_SCRIPT	(1<<2)
+#define TWL4030_SLEEP_SCRIPT	(1<<3)
+};
+
+struct twl4030_resconfig {
+	u8 resource;
+	u8 devgroup;	/* Processor group that Power resource belongs to */
+	u8 type;	/* Power resource addressed, 6 / broadcast message */
+	u8 type2;	/* Power resource addressed, 3 / broadcast message */
+};
+
+struct twl4030_power_data {
+	struct twl4030_script **scripts;
+	unsigned num;
+	struct twl4030_resconfig *resource_config;
+};
+
+extern void twl4030_power_init(struct twl4030_power_data *triton2_scripts);
+
 struct twl4030_platform_data {
 	unsigned				irq_base, irq_end;
 	struct twl4030_bci_platform_data	*bci;
@@ -327,6 +401,7 @@ struct twl4030_platform_data {
 	struct twl4030_madc_platform_data	*madc;
 	struct twl4030_keypad_data		*keypad;
 	struct twl4030_usb_data			*usb;
+	struct twl4030_power_data		*power;
 
 	/* LDO regulators */
 	struct regulator_init_data		*vdac;
@@ -357,7 +432,6 @@ int twl4030_sih_setup(int module);
 #define TWL4030_VAUX3_DEV_GRP		0x1F
 #define TWL4030_VAUX3_DEDICATED		0x22
 
-
 #if defined(CONFIG_TWL4030_BCI_BATTERY) || \
 	defined(CONFIG_TWL4030_BCI_BATTERY_MODULE)
 	extern int twl4030charger_usb_en(int enable);
-- 
1.6.3.3

[PATCH 2/3] MFD: TWL4030: print warning for out-of-order script loading

[Amit Kucheria]

When the sleep script is loaded before the wakeup script, there is a
chance that the system might go to sleep before the wakeup script
loading is completed. This will lead to a system that does not wakeup
and has been observed to cause non-booting boards.

Various options were considered to solve this problem, including
modification of the core twl4030 power code to be smart enough to
reorder the loading of the scripts. But it felt too over-engineered.

Hence this patch just warns the DPS script developer so that they may be
reordered in the board-code itself.

Signed-off-by: Amit Kucheria <amit.kucheria@verdurent.com>
Cc: sameo@linux.intel.com
Cc: dbrownell@users.sourceforge.net
Cc: linux-omap@vger.kernel.org
---
 drivers/mfd/twl4030-power.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/drivers/mfd/twl4030-power.c b/drivers/mfd/twl4030-power.c
index e7688b0..5284c7c 100644
--- a/drivers/mfd/twl4030-power.c
+++ b/drivers/mfd/twl4030-power.c
@@ -379,6 +379,7 @@ static int __init load_twl4030_script(struct twl4030_script *tscript,
 	       u8 address)
 {
 	int err;
+	static int order;
 
 	/* Make sure the script isn't going beyond last valid address (0x3f) */
 	if ((address + tscript->size) > END_OF_SCRIPT) {
@@ -399,6 +400,7 @@ static int __init load_twl4030_script(struct twl4030_script *tscript,
 		err = twl4030_config_wakeup12_sequence(address);
 		if (err)
 			goto out;
+		order = 1;
 	}
 	if (tscript->flags & TWL4030_WAKEUP3_SCRIPT) {
 		err = twl4030_config_wakeup3_sequence(address);
@@ -406,6 +408,10 @@ static int __init load_twl4030_script(struct twl4030_script *tscript,
 			goto out;
 	}
 	if (tscript->flags & TWL4030_SLEEP_SCRIPT)
+		if (order)
+			pr_warning("TWL4030: Bad order of scripts (sleep "\
+					"script before wakeup) Leads to boot"\
+					"failure on some boards\n");
 		err = twl4030_config_sleep_sequence(address);
 out:
 	return err;
-- 
1.6.3.3

[PATCH 3/3] MFD: TWL4030: OMAP: Board-specifc DPS scripts for RX51 board

[Amit Kucheria]

Add support for Dynamic Power Switching (DPS) for the RX51 board.

These scripts are still a work-in-progress. I'll keep sending patches to
update the scripts as they are optimised.

Signed-off-by: Amit Kucheria <amit.kucheria@verdurent.com>
Cc: sameo@linux.intel.com
Cc: tony@atomide.com
Cc: dbrownell@users.sourceforge.net
Cc: linux-omap@vger.kernel.org
---
 arch/arm/mach-omap2/board-rx51-peripherals.c |  122 +++++++++++++++++++++++++-
 1 files changed, 120 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-omap2/board-rx51-peripherals.c b/arch/arm/mach-omap2/board-rx51-peripherals.c
index 9a0bf67..8fc6dbf 100644
--- a/arch/arm/mach-omap2/board-rx51-peripherals.c
+++ b/arch/arm/mach-omap2/board-rx51-peripherals.c
@@ -1,5 +1,5 @@
 /*
- * linux/arch/arm/mach-omap2/board-rx51-flash.c
+ * linux/arch/arm/mach-omap2/board-rx51-peripherals.c
  *
  * Copyright (C) 2008-2009 Nokia
  *
@@ -278,7 +278,124 @@ static struct twl4030_gpio_platform_data rx51_gpio_data = {
 	.setup			= rx51_twlgpio_setup,
 };
 
-static struct twl4030_platform_data rx51_twldata = {
+static struct twl4030_ins sleep_on_seq[] __initdata = {
+/*
+ * Turn off VDD1 and VDD2.
+ */
+	{MSG_SINGULAR(DEV_GRP_P1, 0xf, RES_STATE_OFF), 4},
+	{MSG_SINGULAR(DEV_GRP_P1, 0x10, RES_STATE_OFF), 2},
+/*
+ * And also turn off the OMAP3 PLLs and the sysclk output.
+ */
+	{MSG_SINGULAR(DEV_GRP_P1, 0x7, RES_STATE_OFF), 3},
+	{MSG_SINGULAR(DEV_GRP_P1, 0x17, RES_STATE_OFF), 3},
+};
+
+static struct twl4030_script sleep_on_script __initdata = {
+	.script = sleep_on_seq,
+	.size   = ARRAY_SIZE(sleep_on_seq),
+	.flags  = TWL4030_SLEEP_SCRIPT,
+};
+
+static struct twl4030_ins wakeup_seq[] __initdata = {
+/*
+ * Reenable the OMAP3 PLLs.
+ * Wakeup VDD1 and VDD2.
+ * Reenable sysclk output.
+ */
+	{MSG_SINGULAR(DEV_GRP_P1, 0x7, RES_STATE_ACTIVE), 0x30},
+	{MSG_SINGULAR(DEV_GRP_P1, 0xf, RES_STATE_ACTIVE), 0x30},
+	{MSG_SINGULAR(DEV_GRP_P1, 0x10, RES_STATE_ACTIVE), 0x37},
+	{MSG_SINGULAR(DEV_GRP_P1, 0x19, RES_STATE_ACTIVE), 3},
+};
+
+static struct twl4030_script wakeup_script __initdata = {
+	.script	= wakeup_seq,
+	.size	= ARRAY_SIZE(wakeup_seq),
+	.flags	= TWL4030_WAKEUP12_SCRIPT,
+};
+
+static struct twl4030_ins wakeup_p3_seq[] __initdata = {
+/*
+ * Wakeup VDD1 (dummy to be able to insert a delay)
+ * Enable CLKEN
+ */
+	{MSG_SINGULAR(DEV_GRP_P1, 0x17, RES_STATE_ACTIVE), 3},
+};
+
+static struct twl4030_script wakeup_p3_script __initdata = {
+	.script	= wakeup_p3_seq,
+	.size	= ARRAY_SIZE(wakeup_p3_seq),
+	.flags	= TWL4030_WAKEUP3_SCRIPT,
+};
+
+static struct twl4030_ins wrst_seq[] __initdata = {
+/*
+ * Reset twl4030.
+ * Reset VDD1 regulator.
+ * Reset VDD2 regulator.
+ * Reset VPLL1 regulator.
+ * Enable sysclk output.
+ * Reenable twl4030.
+ */
+	{MSG_SINGULAR(DEV_GRP_NULL, RES_RESET, RES_STATE_OFF), 2},
+	{MSG_BROADCAST(DEV_GRP_NULL, RES_GRP_ALL, 0, 1, RES_STATE_ACTIVE),
+		0x13},
+	{MSG_BROADCAST(DEV_GRP_NULL, RES_GRP_PP, 0, 2, RES_STATE_WRST), 0x13},
+	{MSG_BROADCAST(DEV_GRP_NULL, RES_GRP_PP, 0, 3, RES_STATE_OFF), 0x13},
+	{MSG_SINGULAR(DEV_GRP_NULL, RES_VDD1, RES_STATE_WRST), 0x13},
+	{MSG_SINGULAR(DEV_GRP_NULL, RES_VDD2, RES_STATE_WRST), 0x13},
+	{MSG_SINGULAR(DEV_GRP_NULL, RES_VPLL1, RES_STATE_WRST), 0x35},
+	{MSG_SINGULAR(DEV_GRP_P1, RES_HFCLKOUT, RES_STATE_ACTIVE), 2},
+	{MSG_SINGULAR(DEV_GRP_NULL, RES_RESET, RES_STATE_ACTIVE), 2},
+};
+
+static struct twl4030_script wrst_script __initdata = {
+	.script = wrst_seq,
+	.size   = ARRAY_SIZE(wrst_seq),
+	.flags  = TWL4030_WRST_SCRIPT,
+};
+
+static struct twl4030_script *twl4030_scripts[] __initdata = {
+	/* wakeup12 script should be loaded before sleep script, otherwise a
+	   board might hit retention before loading of wakeup script is
+	   completed. This can cause boot failures depending on timing issues.
+	*/
+	&wakeup_script,
+	&sleep_on_script,
+	&wakeup_p3_script,
+	&wrst_script,
+};
+
+static struct twl4030_resconfig twl4030_rconfig[] __initdata = {
+	{ .resource = RES_VINTANA1, .devgroup = -1, .type = -1, .type2 = 1 },
+	{ .resource = RES_VINTANA2, .devgroup = -1, .type = -1, .type2 = 1 },
+	{ .resource = RES_VINTDIG, .devgroup = -1, .type = -1, .type2 = 1 },
+	{ .resource = RES_VMMC1, .devgroup = -1, .type = -1, .type2 = 3},
+	{ .resource = RES_VMMC2, .devgroup = DEV_GRP_NULL, .type = -1,
+	  .type2 = 3},
+	{ .resource = RES_VAUX1, .devgroup = -1, .type = -1, .type2 = 3},
+	{ .resource = RES_VAUX2, .devgroup = -1, .type = -1, .type2 = 3},
+	{ .resource = RES_VAUX3, .devgroup = -1, .type = -1, .type2 = 3},
+	{ .resource = RES_VAUX4, .devgroup = -1, .type = -1, .type2 = 3},
+	{ .resource = RES_VPLL2, .devgroup = -1, .type = -1, .type2 = 3},
+	{ .resource = RES_VDAC, .devgroup = -1, .type = -1, .type2 = 3},
+	{ .resource = RES_VSIM, .devgroup = DEV_GRP_NULL, .type = -1,
+	  .type2 = 3},
+	{ .resource = RES_CLKEN, .devgroup = DEV_GRP_P3, .type = -1,
+		.type2 = 1 },
+	{ 0, 0},
+};
+
+static struct twl4030_power_data rx51_t2scripts_data __initdata = {
+	.scripts        = twl4030_scripts,
+	.num = ARRAY_SIZE(twl4030_scripts),
+	.resource_config = twl4030_rconfig,
+};
+
+
+
+static struct twl4030_platform_data rx51_twldata __initdata = {
 	.irq_base		= TWL4030_IRQ_BASE,
 	.irq_end		= TWL4030_IRQ_END,
 
@@ -286,6 +403,7 @@ static struct twl4030_platform_data rx51_twldata = {
 	.gpio			= &rx51_gpio_data,
 	.keypad			= &rx51_kp_data,
 	.madc			= &rx51_madc_data,
+	.power			= &rx51_t2scripts_data,
 
 	.vaux1			= &rx51_vaux1,
 	.vaux2			= &rx51_vaux2,
-- 
1.6.3.3

Re: [PATCH 1/3] MFD: TWL4030: Add support for TWL4030/5030 dynamic power switching

[Samuel Ortiz]

Hi Amit,

On Mon, Aug 17, 2009 at 05:01:46PM +0300, Amit Kucheria wrote:
> +
> +#include <asm/mach-types.h>
You'll have to make your Kconfig entry depend on ARM if you want to include
this file. Too bad you need it just for the special sdp and ldp cases, but I
guess there's no other solution.

Cheers,
Samuel.

-- 
Intel Open Source Technology Centre
http://oss.intel.com/

Re: [PATCH 1/3] MFD: TWL4030: Add support for TWL4030/5030 dynamic power switching

[Amit Kucheria]

[-- Attachment #1: Type: text/plain, Size: 478 bytes --]

On Fri, Aug 28, 2009 at 8:47 PM, Samuel Ortiz<sameo@linux.intel.com> wrote:
> Hi Amit,
>
> On Mon, Aug 17, 2009 at 05:01:46PM +0300, Amit Kucheria wrote:
>> +
>> +#include <asm/mach-types.h>
> You'll have to make your Kconfig entry depend on ARM if you want to include
> this file. Too bad you need it just for the special sdp and ldp cases, but I
> guess there's no other solution.
>
> Cheers,
> Samuel.

Hi Samuel,

Modified patch with ARM dependency attached.

Regards,
Amit

[-- Attachment #2: 0001-MFD-TWL4030-Add-support-for-TWL4030-5030-dynamic-pow.patch --]
[-- Type: text/x-patch, Size: 19264 bytes --]

From ee0a4fefed7b1867234d96db6acbf62bbd60c0c0 Mon Sep 17 00:00:00 2001
From: Amit Kucheria <amit.kucheria@verdurent.com>
Date: Mon, 6 Jul 2009 16:42:37 +0300
Subject: [PATCH 1/3] MFD: TWL4030: Add support for TWL4030/5030 dynamic power switching

The TWL4030/5030 family of multifunction devices allows board-specific
control of the the various regulators, clock and reset lines through
'scripts' that are loaded into its memory. This allows for Dynamic Power
Switching (DPS).

Implement board-independent core support for DPS that is then used by
board-specific code to load custom DPS scripts.

Signed-off-by: Amit Kucheria <amit.kucheria@verdurent.com>
Cc: sameo@linux.intel.com
Cc: dbrownell@users.sourceforge.net
Cc: linux-kernel@vger.kernel.org
Cc: linux-omap@vger.kernel.org
---
 drivers/mfd/Kconfig         |   13 ++
 drivers/mfd/Makefile        |    1 +
 drivers/mfd/twl4030-core.c  |   10 +
 drivers/mfd/twl4030-power.c |  466 +++++++++++++++++++++++++++++++++++++++++++
 include/linux/i2c/twl4030.h |   94 ++++++++-
 5 files changed, 574 insertions(+), 10 deletions(-)
 create mode 100644 drivers/mfd/twl4030-power.c

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 491ac0f..c0f1695 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -108,6 +108,19 @@ config TWL4030_CORE
 	  high speed USB OTG transceiver, an audio codec (on most
 	  versions) and many other features.
 
+config TWL4030_POWER
+	bool "Support power resources on TWL4030 family chips"
+	depends on TWL4030_CORE && ARM
+	help
+	  Say yes here if you want to use the power resources on the
+	  TWL4030 family chips.  Most of these resources are regulators,
+	  which have a separate driver; some are control signals, such
+	  as clock request handshaking.
+
+	  This driver uses board-specific data to initialize the resources
+	  and load scripts controling which resources are switched off/on
+	  or reset when a sleep, wakeup or warm reset event occurs.
+
 config MFD_TMIO
 	bool
 	default n
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 6f8a9a1..84b9eda 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -23,6 +23,7 @@ obj-$(CONFIG_TPS65010)		+= tps65010.o
 obj-$(CONFIG_MENELAUS)		+= menelaus.o
 
 obj-$(CONFIG_TWL4030_CORE)	+= twl4030-core.o twl4030-irq.o
+obj-$(CONFIG_TWL4030_POWER)    += twl4030-power.o
 
 obj-$(CONFIG_MFD_CORE)		+= mfd-core.o
 
diff --git a/drivers/mfd/twl4030-core.c b/drivers/mfd/twl4030-core.c
index ca54996..28a45a3 100644
--- a/drivers/mfd/twl4030-core.c
+++ b/drivers/mfd/twl4030-core.c
@@ -89,6 +89,12 @@
 #define twl_has_madc()	false
 #endif
 
+#ifdef CONFIG_TWL4030_POWER
+#define twl_has_power()        true
+#else
+#define twl_has_power()        false
+#endif
+
 #if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
 #define twl_has_rtc()	true
 #else
@@ -788,6 +794,10 @@ twl4030_probe(struct i2c_client *client, const struct i2c_device_id *id)
 	/* setup clock framework */
 	clocks_init(&client->dev);
 
+	/* load power event scripts */
+	if (twl_has_power() && pdata->power)
+		twl4030_power_init(pdata->power);
+
 	/* Maybe init the T2 Interrupt subsystem */
 	if (client->irq
 			&& pdata->irq_base
diff --git a/drivers/mfd/twl4030-power.c b/drivers/mfd/twl4030-power.c
new file mode 100644
index 0000000..e7688b0
--- /dev/null
+++ b/drivers/mfd/twl4030-power.c
@@ -0,0 +1,466 @@
+/*
+ * linux/drivers/i2c/chips/twl4030-power.c
+ *
+ * Handle TWL4030 Power initialization
+ *
+ * Copyright (C) 2008 Nokia Corporation
+ * Copyright (C) 2006 Texas Instruments, Inc
+ *
+ * Written by 	Kalle Jokiniemi
+ *		Peter De Schrijver <peter.de-schrijver@nokia.com>
+ * Several fixes by Amit Kucheria <amit.kucheria@verdurent.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License. See the file "COPYING" in the main directory of this
+ * archive for more details.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/module.h>
+#include <linux/pm.h>
+#include <linux/i2c/twl4030.h>
+#include <linux/platform_device.h>
+
+#include <asm/mach-types.h>
+
+static u8 twl4030_start_script_address = 0x2b;
+
+#define PWR_P1_SW_EVENTS	0x10
+#define PWR_DEVOFF	(1<<0)
+
+#define PHY_TO_OFF_PM_MASTER(p)		(p - 0x36)
+#define PHY_TO_OFF_PM_RECEIVER(p)	(p - 0x5b)
+
+/* resource - hfclk */
+#define R_HFCLKOUT_DEV_GRP 	PHY_TO_OFF_PM_RECEIVER(0xe6)
+
+/* PM events */
+#define R_P1_SW_EVENTS		PHY_TO_OFF_PM_MASTER(0x46)
+#define R_P2_SW_EVENTS		PHY_TO_OFF_PM_MASTER(0x47)
+#define R_P3_SW_EVENTS		PHY_TO_OFF_PM_MASTER(0x48)
+#define R_CFG_P1_TRANSITION	PHY_TO_OFF_PM_MASTER(0x36)
+#define R_CFG_P2_TRANSITION	PHY_TO_OFF_PM_MASTER(0x37)
+#define R_CFG_P3_TRANSITION	PHY_TO_OFF_PM_MASTER(0x38)
+
+#define LVL_WAKEUP	0x08
+
+#define ENABLE_WARMRESET (1<<4)
+
+#define END_OF_SCRIPT		0x3f
+
+#define R_SEQ_ADD_A2S		PHY_TO_OFF_PM_MASTER(0x55)
+#define R_SEQ_ADD_S2A12		PHY_TO_OFF_PM_MASTER(0x56)
+#define	R_SEQ_ADD_S2A3		PHY_TO_OFF_PM_MASTER(0x57)
+#define	R_SEQ_ADD_WARM		PHY_TO_OFF_PM_MASTER(0x58)
+#define R_MEMORY_ADDRESS	PHY_TO_OFF_PM_MASTER(0x59)
+#define R_MEMORY_DATA		PHY_TO_OFF_PM_MASTER(0x5a)
+
+#define R_PROTECT_KEY		0x0E
+#define KEY_1			0xC0
+#define KEY_2			0x0C
+
+/* resource configuration registers */
+
+#define DEVGROUP_OFFSET		0
+#define TYPE_OFFSET		1
+
+/* Bit positions */
+#define DEVGROUP_SHIFT		5
+#define DEVGROUP_MASK		(7 << DEVGROUP_SHIFT)
+#define TYPE_SHIFT		0
+#define TYPE_MASK		(7 << TYPE_SHIFT)
+#define TYPE2_SHIFT		3
+#define TYPE2_MASK		(3 << TYPE2_SHIFT)
+
+static u8 res_config_addrs[] = {
+	[RES_VAUX1]	= 0x17,
+	[RES_VAUX2]	= 0x1b,
+	[RES_VAUX3]	= 0x1f,
+	[RES_VAUX4]	= 0x23,
+	[RES_VMMC1]	= 0x27,
+	[RES_VMMC2]	= 0x2b,
+	[RES_VPLL1]	= 0x2f,
+	[RES_VPLL2]	= 0x33,
+	[RES_VSIM]	= 0x37,
+	[RES_VDAC]	= 0x3b,
+	[RES_VINTANA1]	= 0x3f,
+	[RES_VINTANA2]	= 0x43,
+	[RES_VINTDIG]	= 0x47,
+	[RES_VIO]	= 0x4b,
+	[RES_VDD1]	= 0x55,
+	[RES_VDD2]	= 0x63,
+	[RES_VUSB_1V5]	= 0x71,
+	[RES_VUSB_1V8]	= 0x74,
+	[RES_VUSB_3V1]	= 0x77,
+	[RES_VUSBCP]	= 0x7a,
+	[RES_REGEN]	= 0x7f,
+	[RES_NRES_PWRON] = 0x82,
+	[RES_CLKEN]	= 0x85,
+	[RES_SYSEN]	= 0x88,
+	[RES_HFCLKOUT]	= 0x8b,
+	[RES_32KCLKOUT]	= 0x8e,
+	[RES_RESET]	= 0x91,
+	[RES_Main_Ref]	= 0x94,
+};
+
+static int __init twl4030_write_script_byte(u8 address, u8 byte)
+{
+	int err;
+
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
+				R_MEMORY_ADDRESS);
+	if (err)
+		goto out;
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, byte,
+				R_MEMORY_DATA);
+out:
+	return err;
+}
+
+static int __init twl4030_write_script_ins(u8 address, u16 pmb_message,
+					   u8 delay, u8 next)
+{
+	int err;
+
+	address *= 4;
+	err = twl4030_write_script_byte(address++, pmb_message >> 8);
+	if (err)
+		goto out;
+	err = twl4030_write_script_byte(address++, pmb_message & 0xff);
+	if (err)
+		goto out;
+	err = twl4030_write_script_byte(address++, delay);
+	if (err)
+		goto out;
+	err = twl4030_write_script_byte(address++, next);
+out:
+	return err;
+}
+
+static int __init twl4030_write_script(u8 address, struct twl4030_ins *script,
+				       int len)
+{
+	int err;
+
+	for (; len; len--, address++, script++) {
+		if (len == 1) {
+			err = twl4030_write_script_ins(address,
+						script->pmb_message,
+						script->delay,
+						END_OF_SCRIPT);
+			if (err)
+				break;
+		} else {
+			err = twl4030_write_script_ins(address,
+						script->pmb_message,
+						script->delay,
+						address + 1);
+			if (err)
+				break;
+		}
+	}
+	return err;
+}
+
+static int __init twl4030_config_wakeup3_sequence(u8 address)
+{
+	int err;
+	u8 data;
+
+	/* Set SLEEP to ACTIVE SEQ address for P3 */
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
+				R_SEQ_ADD_S2A3);
+	if (err)
+		goto out;
+
+	/* P3 LVL_WAKEUP should be on LEVEL */
+	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data,
+				R_P3_SW_EVENTS);
+	if (err)
+		goto out;
+	data |= LVL_WAKEUP;
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data,
+				R_P3_SW_EVENTS);
+out:
+	if (err)
+		pr_err("TWL4030 wakeup sequence for P3 config error\n");
+	return err;
+}
+
+static int __init twl4030_config_wakeup12_sequence(u8 address)
+{
+	int err = 0;
+	u8 data;
+
+	/* Set SLEEP to ACTIVE SEQ address for P1 and P2 */
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
+				R_SEQ_ADD_S2A12);
+	if (err)
+		goto out;
+
+	/* P1/P2 LVL_WAKEUP should be on LEVEL */
+	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data,
+				R_P1_SW_EVENTS);
+	if (err)
+		goto out;
+
+	data |= LVL_WAKEUP;
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data,
+				R_P1_SW_EVENTS);
+	if (err)
+		goto out;
+
+	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data,
+				R_P2_SW_EVENTS);
+	if (err)
+		goto out;
+
+	data |= LVL_WAKEUP;
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data,
+				R_P2_SW_EVENTS);
+	if (err)
+		goto out;
+
+	if (machine_is_omap_3430sdp() || machine_is_omap_ldp()) {
+		/* Disabling AC charger effect on sleep-active transitions */
+		err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data,
+					R_CFG_P1_TRANSITION);
+		if (err)
+			goto out;
+		data &= ~(1<<1);
+		err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data ,
+					R_CFG_P1_TRANSITION);
+		if (err)
+			goto out;
+	}
+
+out:
+	if (err)
+		pr_err("TWL4030 wakeup sequence for P1 and P2" \
+			"config error\n");
+	return err;
+}
+
+static int __init twl4030_config_sleep_sequence(u8 address)
+{
+	int err;
+
+	/* Set ACTIVE to SLEEP SEQ address in T2 memory*/
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
+				R_SEQ_ADD_A2S);
+
+	if (err)
+		pr_err("TWL4030 sleep sequence config error\n");
+
+	return err;
+}
+
+static int __init twl4030_config_warmreset_sequence(u8 address)
+{
+	int err;
+	u8 rd_data;
+
+	/* Set WARM RESET SEQ address for P1 */
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
+				R_SEQ_ADD_WARM);
+	if (err)
+		goto out;
+
+	/* P1/P2/P3 enable WARMRESET */
+	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &rd_data,
+				R_P1_SW_EVENTS);
+	if (err)
+		goto out;
+
+	rd_data |= ENABLE_WARMRESET;
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, rd_data,
+				R_P1_SW_EVENTS);
+	if (err)
+		goto out;
+
+	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &rd_data,
+				R_P2_SW_EVENTS);
+	if (err)
+		goto out;
+
+	rd_data |= ENABLE_WARMRESET;
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, rd_data,
+				R_P2_SW_EVENTS);
+	if (err)
+		goto out;
+
+	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &rd_data,
+				R_P3_SW_EVENTS);
+	if (err)
+		goto out;
+
+	rd_data |= ENABLE_WARMRESET;
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, rd_data,
+				R_P3_SW_EVENTS);
+out:
+	if (err)
+		pr_err("TWL4030 warmreset seq config error\n");
+	return err;
+}
+
+static int __init twl4030_configure_resource(struct twl4030_resconfig *rconfig)
+{
+	int rconfig_addr;
+	int err;
+	u8 type;
+	u8 grp;
+
+	if (rconfig->resource > TOTAL_RESOURCES) {
+		pr_err("TWL4030 Resource %d does not exist\n",
+			rconfig->resource);
+		return -EINVAL;
+	}
+
+	rconfig_addr = res_config_addrs[rconfig->resource];
+
+	/* Set resource group */
+	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &grp,
+				rconfig_addr + DEVGROUP_OFFSET);
+	if (err) {
+		pr_err("TWL4030 Resource %d group could not be read\n",
+			rconfig->resource);
+		return err;
+	}
+
+	if (rconfig->devgroup >= 0) {
+		grp &= ~DEVGROUP_MASK;
+		grp |= rconfig->devgroup << DEVGROUP_SHIFT;
+		err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
+					grp, rconfig_addr + DEVGROUP_OFFSET);
+		if (err < 0) {
+			pr_err("TWL4030 failed to program devgroup\n");
+			return err;
+		}
+	}
+
+	/* Set resource types */
+	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &type,
+				rconfig_addr + TYPE_OFFSET);
+	if (err < 0) {
+		pr_err("TWL4030 Resource %d type could not be read\n",
+			rconfig->resource);
+		return err;
+	}
+
+	if (rconfig->type >= 0) {
+		type &= ~TYPE_MASK;
+		type |= rconfig->type << TYPE_SHIFT;
+	}
+
+	if (rconfig->type2 >= 0) {
+		type &= ~TYPE2_MASK;
+		type |= rconfig->type2 << TYPE2_SHIFT;
+	}
+
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
+				type, rconfig_addr + TYPE_OFFSET);
+	if (err < 0) {
+		pr_err("TWL4030 failed to program resource type\n");
+		return err;
+	}
+
+	return 0;
+}
+
+static int __init load_twl4030_script(struct twl4030_script *tscript,
+	       u8 address)
+{
+	int err;
+
+	/* Make sure the script isn't going beyond last valid address (0x3f) */
+	if ((address + tscript->size) > END_OF_SCRIPT) {
+		pr_err("TWL4030 scripts too big error\n");
+		return -EINVAL;
+	}
+
+	err = twl4030_write_script(address, tscript->script, tscript->size);
+	if (err)
+		goto out;
+
+	if (tscript->flags & TWL4030_WRST_SCRIPT) {
+		err = twl4030_config_warmreset_sequence(address);
+		if (err)
+			goto out;
+	}
+	if (tscript->flags & TWL4030_WAKEUP12_SCRIPT) {
+		err = twl4030_config_wakeup12_sequence(address);
+		if (err)
+			goto out;
+	}
+	if (tscript->flags & TWL4030_WAKEUP3_SCRIPT) {
+		err = twl4030_config_wakeup3_sequence(address);
+		if (err)
+			goto out;
+	}
+	if (tscript->flags & TWL4030_SLEEP_SCRIPT)
+		err = twl4030_config_sleep_sequence(address);
+out:
+	return err;
+}
+
+void __init twl4030_power_init(struct twl4030_power_data *twl4030_scripts)
+{
+	int err = 0;
+	int i;
+	struct twl4030_resconfig *resconfig;
+	u8 address = twl4030_start_script_address;
+
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_1,
+				R_PROTECT_KEY);
+	if (err)
+		goto unlock;
+
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_2,
+				R_PROTECT_KEY);
+	if (err)
+		goto unlock;
+
+	for (i = 0; i < twl4030_scripts->num; i++) {
+		err = load_twl4030_script(twl4030_scripts->scripts[i], address);
+		if (err)
+			goto load;
+		address += twl4030_scripts->scripts[i]->size;
+	}
+
+	resconfig = twl4030_scripts->resource_config;
+	if (resconfig) {
+		while (resconfig->resource) {
+			err = twl4030_configure_resource(resconfig);
+			if (err)
+				goto resource;
+			resconfig++;
+
+		}
+	}
+
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0, R_PROTECT_KEY);
+	if (err)
+		pr_err("TWL4030 Unable to relock registers\n");
+	return;
+
+unlock:
+	if (err)
+		pr_err("TWL4030 Unable to unlock registers\n");
+	return;
+load:
+	if (err)
+		pr_err("TWL4030 failed to load scripts\n");
+	return;
+resource:
+	if (err)
+		pr_err("TWL4030 failed to configure resource\n");
+	return;
+}
diff --git a/include/linux/i2c/twl4030.h b/include/linux/i2c/twl4030.h
index 0dc80ef..d0c24ad 100644
--- a/include/linux/i2c/twl4030.h
+++ b/include/linux/i2c/twl4030.h
@@ -220,19 +220,28 @@ int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes);
 
 /* Power bus message definitions */
 
-#define DEV_GRP_NULL		0x0
-#define DEV_GRP_P1		0x1
-#define DEV_GRP_P2		0x2
-#define DEV_GRP_P3		0x4
+/* The TWL4030/5030 splits its power-management resources (the various
+ * regulators, clock and reset lines) into 3 processor groups - P1, P2 and
+ * P3. These groups can then be configured to transition between sleep, wait-on
+ * and active states by sending messages to the power bus.  See Section 5.4.2
+ * Power Resources of TWL4030 TRM
+ */
 
-#define RES_GRP_RES		0x0
-#define RES_GRP_PP		0x1
-#define RES_GRP_RC		0x2
+/* Processor groups */
+#define DEV_GRP_NULL		0x0
+#define DEV_GRP_P1		0x1	/* P1: all OMAP devices */
+#define DEV_GRP_P2		0x2	/* P2: all Modem devices */
+#define DEV_GRP_P3		0x4	/* P3: all peripheral devices */
+
+/* Resource groups */
+#define RES_GRP_RES		0x0	/* Reserved */
+#define RES_GRP_PP		0x1	/* Power providers */
+#define RES_GRP_RC		0x2	/* Reset and control */
 #define RES_GRP_PP_RC		0x3
-#define RES_GRP_PR		0x4
+#define RES_GRP_PR		0x4	/* Power references */
 #define RES_GRP_PP_PR		0x5
 #define RES_GRP_RC_PR		0x6
-#define RES_GRP_ALL		0x7
+#define RES_GRP_ALL		0x7	/* All resource groups */
 
 #define RES_TYPE2_R0		0x0
 
@@ -243,6 +252,41 @@ int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes);
 #define RES_STATE_SLEEP		0x8
 #define RES_STATE_OFF		0x0
 
+/* Power resources */
+
+/* Power providers */
+#define RES_VAUX1               1
+#define RES_VAUX2               2
+#define RES_VAUX3               3
+#define RES_VAUX4               4
+#define RES_VMMC1               5
+#define RES_VMMC2               6
+#define RES_VPLL1               7
+#define RES_VPLL2               8
+#define RES_VSIM                9
+#define RES_VDAC                10
+#define RES_VINTANA1            11
+#define RES_VINTANA2            12
+#define RES_VINTDIG             13
+#define RES_VIO                 14
+#define RES_VDD1                15
+#define RES_VDD2                16
+#define RES_VUSB_1V5            17
+#define RES_VUSB_1V8            18
+#define RES_VUSB_3V1            19
+#define RES_VUSBCP              20
+#define RES_REGEN               21
+/* Reset and control */
+#define RES_NRES_PWRON          22
+#define RES_CLKEN               23
+#define RES_SYSEN               24
+#define RES_HFCLKOUT            25
+#define RES_32KCLKOUT           26
+#define RES_RESET               27
+/* Power Reference */
+#define RES_Main_Ref            28
+
+#define TOTAL_RESOURCES		28
 /*
  * Power Bus Message Format ... these can be sent individually by Linux,
  * but are usually part of downloaded scripts that are run when various
@@ -320,6 +364,36 @@ struct twl4030_usb_data {
 	enum twl4030_usb_mode	usb_mode;
 };
 
+struct twl4030_ins {
+	u16 pmb_message;
+	u8 delay;
+};
+
+struct twl4030_script {
+	struct twl4030_ins *script;
+	unsigned size;
+	u8 flags;
+#define TWL4030_WRST_SCRIPT	(1<<0)
+#define TWL4030_WAKEUP12_SCRIPT	(1<<1)
+#define TWL4030_WAKEUP3_SCRIPT	(1<<2)
+#define TWL4030_SLEEP_SCRIPT	(1<<3)
+};
+
+struct twl4030_resconfig {
+	u8 resource;
+	u8 devgroup;	/* Processor group that Power resource belongs to */
+	u8 type;	/* Power resource addressed, 6 / broadcast message */
+	u8 type2;	/* Power resource addressed, 3 / broadcast message */
+};
+
+struct twl4030_power_data {
+	struct twl4030_script **scripts;
+	unsigned num;
+	struct twl4030_resconfig *resource_config;
+};
+
+extern void twl4030_power_init(struct twl4030_power_data *triton2_scripts);
+
 struct twl4030_platform_data {
 	unsigned				irq_base, irq_end;
 	struct twl4030_bci_platform_data	*bci;
@@ -327,6 +401,7 @@ struct twl4030_platform_data {
 	struct twl4030_madc_platform_data	*madc;
 	struct twl4030_keypad_data		*keypad;
 	struct twl4030_usb_data			*usb;
+	struct twl4030_power_data		*power;
 
 	/* LDO regulators */
 	struct regulator_init_data		*vdac;
@@ -357,7 +432,6 @@ int twl4030_sih_setup(int module);
 #define TWL4030_VAUX3_DEV_GRP		0x1F
 #define TWL4030_VAUX3_DEDICATED		0x22
 
-
 #if defined(CONFIG_TWL4030_BCI_BATTERY) || \
 	defined(CONFIG_TWL4030_BCI_BATTERY_MODULE)
 	extern int twl4030charger_usb_en(int enable);
-- 
1.6.3.3

Re: [PATCH 1/3] MFD: TWL4030: Add support for TWL4030/5030 dynamic power switching

[Amit Kucheria]

[-- Attachment #1: Type: text/plain, Size: 478 bytes --]

On Fri, Aug 28, 2009 at 8:47 PM, Samuel Ortiz<sameo@linux.intel.com> wrote:
> Hi Amit,
>
> On Mon, Aug 17, 2009 at 05:01:46PM +0300, Amit Kucheria wrote:
>> +
>> +#include <asm/mach-types.h>
> You'll have to make your Kconfig entry depend on ARM if you want to include
> this file. Too bad you need it just for the special sdp and ldp cases, but I
> guess there's no other solution.
>
> Cheers,
> Samuel.

Hi Samuel,

Modified patch with ARM dependency attached.

Regards,
Amit

[-- Attachment #2: 0001-MFD-TWL4030-Add-support-for-TWL4030-5030-dynamic-pow.patch --]
[-- Type: text/x-patch, Size: 19264 bytes --]

From ee0a4fefed7b1867234d96db6acbf62bbd60c0c0 Mon Sep 17 00:00:00 2001
From: Amit Kucheria <amit.kucheria@verdurent.com>
Date: Mon, 6 Jul 2009 16:42:37 +0300
Subject: [PATCH 1/3] MFD: TWL4030: Add support for TWL4030/5030 dynamic power switching

The TWL4030/5030 family of multifunction devices allows board-specific
control of the the various regulators, clock and reset lines through
'scripts' that are loaded into its memory. This allows for Dynamic Power
Switching (DPS).

Implement board-independent core support for DPS that is then used by
board-specific code to load custom DPS scripts.

Signed-off-by: Amit Kucheria <amit.kucheria@verdurent.com>
Cc: sameo@linux.intel.com
Cc: dbrownell@users.sourceforge.net
Cc: linux-kernel@vger.kernel.org
Cc: linux-omap@vger.kernel.org
---
 drivers/mfd/Kconfig         |   13 ++
 drivers/mfd/Makefile        |    1 +
 drivers/mfd/twl4030-core.c  |   10 +
 drivers/mfd/twl4030-power.c |  466 +++++++++++++++++++++++++++++++++++++++++++
 include/linux/i2c/twl4030.h |   94 ++++++++-
 5 files changed, 574 insertions(+), 10 deletions(-)
 create mode 100644 drivers/mfd/twl4030-power.c

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 491ac0f..c0f1695 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -108,6 +108,19 @@ config TWL4030_CORE
 	  high speed USB OTG transceiver, an audio codec (on most
 	  versions) and many other features.
 
+config TWL4030_POWER
+	bool "Support power resources on TWL4030 family chips"
+	depends on TWL4030_CORE && ARM
+	help
+	  Say yes here if you want to use the power resources on the
+	  TWL4030 family chips.  Most of these resources are regulators,
+	  which have a separate driver; some are control signals, such
+	  as clock request handshaking.
+
+	  This driver uses board-specific data to initialize the resources
+	  and load scripts controling which resources are switched off/on
+	  or reset when a sleep, wakeup or warm reset event occurs.
+
 config MFD_TMIO
 	bool
 	default n
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 6f8a9a1..84b9eda 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -23,6 +23,7 @@ obj-$(CONFIG_TPS65010)		+= tps65010.o
 obj-$(CONFIG_MENELAUS)		+= menelaus.o
 
 obj-$(CONFIG_TWL4030_CORE)	+= twl4030-core.o twl4030-irq.o
+obj-$(CONFIG_TWL4030_POWER)    += twl4030-power.o
 
 obj-$(CONFIG_MFD_CORE)		+= mfd-core.o
 
diff --git a/drivers/mfd/twl4030-core.c b/drivers/mfd/twl4030-core.c
index ca54996..28a45a3 100644
--- a/drivers/mfd/twl4030-core.c
+++ b/drivers/mfd/twl4030-core.c
@@ -89,6 +89,12 @@
 #define twl_has_madc()	false
 #endif
 
+#ifdef CONFIG_TWL4030_POWER
+#define twl_has_power()        true
+#else
+#define twl_has_power()        false
+#endif
+
 #if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
 #define twl_has_rtc()	true
 #else
@@ -788,6 +794,10 @@ twl4030_probe(struct i2c_client *client, const struct i2c_device_id *id)
 	/* setup clock framework */
 	clocks_init(&client->dev);
 
+	/* load power event scripts */
+	if (twl_has_power() && pdata->power)
+		twl4030_power_init(pdata->power);
+
 	/* Maybe init the T2 Interrupt subsystem */
 	if (client->irq
 			&& pdata->irq_base
diff --git a/drivers/mfd/twl4030-power.c b/drivers/mfd/twl4030-power.c
new file mode 100644
index 0000000..e7688b0
--- /dev/null
+++ b/drivers/mfd/twl4030-power.c
@@ -0,0 +1,466 @@
+/*
+ * linux/drivers/i2c/chips/twl4030-power.c
+ *
+ * Handle TWL4030 Power initialization
+ *
+ * Copyright (C) 2008 Nokia Corporation
+ * Copyright (C) 2006 Texas Instruments, Inc
+ *
+ * Written by 	Kalle Jokiniemi
+ *		Peter De Schrijver <peter.de-schrijver@nokia.com>
+ * Several fixes by Amit Kucheria <amit.kucheria@verdurent.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License. See the file "COPYING" in the main directory of this
+ * archive for more details.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/module.h>
+#include <linux/pm.h>
+#include <linux/i2c/twl4030.h>
+#include <linux/platform_device.h>
+
+#include <asm/mach-types.h>
+
+static u8 twl4030_start_script_address = 0x2b;
+
+#define PWR_P1_SW_EVENTS	0x10
+#define PWR_DEVOFF	(1<<0)
+
+#define PHY_TO_OFF_PM_MASTER(p)		(p - 0x36)
+#define PHY_TO_OFF_PM_RECEIVER(p)	(p - 0x5b)
+
+/* resource - hfclk */
+#define R_HFCLKOUT_DEV_GRP 	PHY_TO_OFF_PM_RECEIVER(0xe6)
+
+/* PM events */
+#define R_P1_SW_EVENTS		PHY_TO_OFF_PM_MASTER(0x46)
+#define R_P2_SW_EVENTS		PHY_TO_OFF_PM_MASTER(0x47)
+#define R_P3_SW_EVENTS		PHY_TO_OFF_PM_MASTER(0x48)
+#define R_CFG_P1_TRANSITION	PHY_TO_OFF_PM_MASTER(0x36)
+#define R_CFG_P2_TRANSITION	PHY_TO_OFF_PM_MASTER(0x37)
+#define R_CFG_P3_TRANSITION	PHY_TO_OFF_PM_MASTER(0x38)
+
+#define LVL_WAKEUP	0x08
+
+#define ENABLE_WARMRESET (1<<4)
+
+#define END_OF_SCRIPT		0x3f
+
+#define R_SEQ_ADD_A2S		PHY_TO_OFF_PM_MASTER(0x55)
+#define R_SEQ_ADD_S2A12		PHY_TO_OFF_PM_MASTER(0x56)
+#define	R_SEQ_ADD_S2A3		PHY_TO_OFF_PM_MASTER(0x57)
+#define	R_SEQ_ADD_WARM		PHY_TO_OFF_PM_MASTER(0x58)
+#define R_MEMORY_ADDRESS	PHY_TO_OFF_PM_MASTER(0x59)
+#define R_MEMORY_DATA		PHY_TO_OFF_PM_MASTER(0x5a)
+
+#define R_PROTECT_KEY		0x0E
+#define KEY_1			0xC0
+#define KEY_2			0x0C
+
+/* resource configuration registers */
+
+#define DEVGROUP_OFFSET		0
+#define TYPE_OFFSET		1
+
+/* Bit positions */
+#define DEVGROUP_SHIFT		5
+#define DEVGROUP_MASK		(7 << DEVGROUP_SHIFT)
+#define TYPE_SHIFT		0
+#define TYPE_MASK		(7 << TYPE_SHIFT)
+#define TYPE2_SHIFT		3
+#define TYPE2_MASK		(3 << TYPE2_SHIFT)
+
+static u8 res_config_addrs[] = {
+	[RES_VAUX1]	= 0x17,
+	[RES_VAUX2]	= 0x1b,
+	[RES_VAUX3]	= 0x1f,
+	[RES_VAUX4]	= 0x23,
+	[RES_VMMC1]	= 0x27,
+	[RES_VMMC2]	= 0x2b,
+	[RES_VPLL1]	= 0x2f,
+	[RES_VPLL2]	= 0x33,
+	[RES_VSIM]	= 0x37,
+	[RES_VDAC]	= 0x3b,
+	[RES_VINTANA1]	= 0x3f,
+	[RES_VINTANA2]	= 0x43,
+	[RES_VINTDIG]	= 0x47,
+	[RES_VIO]	= 0x4b,
+	[RES_VDD1]	= 0x55,
+	[RES_VDD2]	= 0x63,
+	[RES_VUSB_1V5]	= 0x71,
+	[RES_VUSB_1V8]	= 0x74,
+	[RES_VUSB_3V1]	= 0x77,
+	[RES_VUSBCP]	= 0x7a,
+	[RES_REGEN]	= 0x7f,
+	[RES_NRES_PWRON] = 0x82,
+	[RES_CLKEN]	= 0x85,
+	[RES_SYSEN]	= 0x88,
+	[RES_HFCLKOUT]	= 0x8b,
+	[RES_32KCLKOUT]	= 0x8e,
+	[RES_RESET]	= 0x91,
+	[RES_Main_Ref]	= 0x94,
+};
+
+static int __init twl4030_write_script_byte(u8 address, u8 byte)
+{
+	int err;
+
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
+				R_MEMORY_ADDRESS);
+	if (err)
+		goto out;
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, byte,
+				R_MEMORY_DATA);
+out:
+	return err;
+}
+
+static int __init twl4030_write_script_ins(u8 address, u16 pmb_message,
+					   u8 delay, u8 next)
+{
+	int err;
+
+	address *= 4;
+	err = twl4030_write_script_byte(address++, pmb_message >> 8);
+	if (err)
+		goto out;
+	err = twl4030_write_script_byte(address++, pmb_message & 0xff);
+	if (err)
+		goto out;
+	err = twl4030_write_script_byte(address++, delay);
+	if (err)
+		goto out;
+	err = twl4030_write_script_byte(address++, next);
+out:
+	return err;
+}
+
+static int __init twl4030_write_script(u8 address, struct twl4030_ins *script,
+				       int len)
+{
+	int err;
+
+	for (; len; len--, address++, script++) {
+		if (len == 1) {
+			err = twl4030_write_script_ins(address,
+						script->pmb_message,
+						script->delay,
+						END_OF_SCRIPT);
+			if (err)
+				break;
+		} else {
+			err = twl4030_write_script_ins(address,
+						script->pmb_message,
+						script->delay,
+						address + 1);
+			if (err)
+				break;
+		}
+	}
+	return err;
+}
+
+static int __init twl4030_config_wakeup3_sequence(u8 address)
+{
+	int err;
+	u8 data;
+
+	/* Set SLEEP to ACTIVE SEQ address for P3 */
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
+				R_SEQ_ADD_S2A3);
+	if (err)
+		goto out;
+
+	/* P3 LVL_WAKEUP should be on LEVEL */
+	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data,
+				R_P3_SW_EVENTS);
+	if (err)
+		goto out;
+	data |= LVL_WAKEUP;
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data,
+				R_P3_SW_EVENTS);
+out:
+	if (err)
+		pr_err("TWL4030 wakeup sequence for P3 config error\n");
+	return err;
+}
+
+static int __init twl4030_config_wakeup12_sequence(u8 address)
+{
+	int err = 0;
+	u8 data;
+
+	/* Set SLEEP to ACTIVE SEQ address for P1 and P2 */
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
+				R_SEQ_ADD_S2A12);
+	if (err)
+		goto out;
+
+	/* P1/P2 LVL_WAKEUP should be on LEVEL */
+	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data,
+				R_P1_SW_EVENTS);
+	if (err)
+		goto out;
+
+	data |= LVL_WAKEUP;
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data,
+				R_P1_SW_EVENTS);
+	if (err)
+		goto out;
+
+	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data,
+				R_P2_SW_EVENTS);
+	if (err)
+		goto out;
+
+	data |= LVL_WAKEUP;
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data,
+				R_P2_SW_EVENTS);
+	if (err)
+		goto out;
+
+	if (machine_is_omap_3430sdp() || machine_is_omap_ldp()) {
+		/* Disabling AC charger effect on sleep-active transitions */
+		err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data,
+					R_CFG_P1_TRANSITION);
+		if (err)
+			goto out;
+		data &= ~(1<<1);
+		err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data ,
+					R_CFG_P1_TRANSITION);
+		if (err)
+			goto out;
+	}
+
+out:
+	if (err)
+		pr_err("TWL4030 wakeup sequence for P1 and P2" \
+			"config error\n");
+	return err;
+}
+
+static int __init twl4030_config_sleep_sequence(u8 address)
+{
+	int err;
+
+	/* Set ACTIVE to SLEEP SEQ address in T2 memory*/
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
+				R_SEQ_ADD_A2S);
+
+	if (err)
+		pr_err("TWL4030 sleep sequence config error\n");
+
+	return err;
+}
+
+static int __init twl4030_config_warmreset_sequence(u8 address)
+{
+	int err;
+	u8 rd_data;
+
+	/* Set WARM RESET SEQ address for P1 */
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
+				R_SEQ_ADD_WARM);
+	if (err)
+		goto out;
+
+	/* P1/P2/P3 enable WARMRESET */
+	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &rd_data,
+				R_P1_SW_EVENTS);
+	if (err)
+		goto out;
+
+	rd_data |= ENABLE_WARMRESET;
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, rd_data,
+				R_P1_SW_EVENTS);
+	if (err)
+		goto out;
+
+	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &rd_data,
+				R_P2_SW_EVENTS);
+	if (err)
+		goto out;
+
+	rd_data |= ENABLE_WARMRESET;
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, rd_data,
+				R_P2_SW_EVENTS);
+	if (err)
+		goto out;
+
+	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &rd_data,
+				R_P3_SW_EVENTS);
+	if (err)
+		goto out;
+
+	rd_data |= ENABLE_WARMRESET;
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, rd_data,
+				R_P3_SW_EVENTS);
+out:
+	if (err)
+		pr_err("TWL4030 warmreset seq config error\n");
+	return err;
+}
+
+static int __init twl4030_configure_resource(struct twl4030_resconfig *rconfig)
+{
+	int rconfig_addr;
+	int err;
+	u8 type;
+	u8 grp;
+
+	if (rconfig->resource > TOTAL_RESOURCES) {
+		pr_err("TWL4030 Resource %d does not exist\n",
+			rconfig->resource);
+		return -EINVAL;
+	}
+
+	rconfig_addr = res_config_addrs[rconfig->resource];
+
+	/* Set resource group */
+	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &grp,
+				rconfig_addr + DEVGROUP_OFFSET);
+	if (err) {
+		pr_err("TWL4030 Resource %d group could not be read\n",
+			rconfig->resource);
+		return err;
+	}
+
+	if (rconfig->devgroup >= 0) {
+		grp &= ~DEVGROUP_MASK;
+		grp |= rconfig->devgroup << DEVGROUP_SHIFT;
+		err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
+					grp, rconfig_addr + DEVGROUP_OFFSET);
+		if (err < 0) {
+			pr_err("TWL4030 failed to program devgroup\n");
+			return err;
+		}
+	}
+
+	/* Set resource types */
+	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &type,
+				rconfig_addr + TYPE_OFFSET);
+	if (err < 0) {
+		pr_err("TWL4030 Resource %d type could not be read\n",
+			rconfig->resource);
+		return err;
+	}
+
+	if (rconfig->type >= 0) {
+		type &= ~TYPE_MASK;
+		type |= rconfig->type << TYPE_SHIFT;
+	}
+
+	if (rconfig->type2 >= 0) {
+		type &= ~TYPE2_MASK;
+		type |= rconfig->type2 << TYPE2_SHIFT;
+	}
+
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
+				type, rconfig_addr + TYPE_OFFSET);
+	if (err < 0) {
+		pr_err("TWL4030 failed to program resource type\n");
+		return err;
+	}
+
+	return 0;
+}
+
+static int __init load_twl4030_script(struct twl4030_script *tscript,
+	       u8 address)
+{
+	int err;
+
+	/* Make sure the script isn't going beyond last valid address (0x3f) */
+	if ((address + tscript->size) > END_OF_SCRIPT) {
+		pr_err("TWL4030 scripts too big error\n");
+		return -EINVAL;
+	}
+
+	err = twl4030_write_script(address, tscript->script, tscript->size);
+	if (err)
+		goto out;
+
+	if (tscript->flags & TWL4030_WRST_SCRIPT) {
+		err = twl4030_config_warmreset_sequence(address);
+		if (err)
+			goto out;
+	}
+	if (tscript->flags & TWL4030_WAKEUP12_SCRIPT) {
+		err = twl4030_config_wakeup12_sequence(address);
+		if (err)
+			goto out;
+	}
+	if (tscript->flags & TWL4030_WAKEUP3_SCRIPT) {
+		err = twl4030_config_wakeup3_sequence(address);
+		if (err)
+			goto out;
+	}
+	if (tscript->flags & TWL4030_SLEEP_SCRIPT)
+		err = twl4030_config_sleep_sequence(address);
+out:
+	return err;
+}
+
+void __init twl4030_power_init(struct twl4030_power_data *twl4030_scripts)
+{
+	int err = 0;
+	int i;
+	struct twl4030_resconfig *resconfig;
+	u8 address = twl4030_start_script_address;
+
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_1,
+				R_PROTECT_KEY);
+	if (err)
+		goto unlock;
+
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_2,
+				R_PROTECT_KEY);
+	if (err)
+		goto unlock;
+
+	for (i = 0; i < twl4030_scripts->num; i++) {
+		err = load_twl4030_script(twl4030_scripts->scripts[i], address);
+		if (err)
+			goto load;
+		address += twl4030_scripts->scripts[i]->size;
+	}
+
+	resconfig = twl4030_scripts->resource_config;
+	if (resconfig) {
+		while (resconfig->resource) {
+			err = twl4030_configure_resource(resconfig);
+			if (err)
+				goto resource;
+			resconfig++;
+
+		}
+	}
+
+	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0, R_PROTECT_KEY);
+	if (err)
+		pr_err("TWL4030 Unable to relock registers\n");
+	return;
+
+unlock:
+	if (err)
+		pr_err("TWL4030 Unable to unlock registers\n");
+	return;
+load:
+	if (err)
+		pr_err("TWL4030 failed to load scripts\n");
+	return;
+resource:
+	if (err)
+		pr_err("TWL4030 failed to configure resource\n");
+	return;
+}
diff --git a/include/linux/i2c/twl4030.h b/include/linux/i2c/twl4030.h
index 0dc80ef..d0c24ad 100644
--- a/include/linux/i2c/twl4030.h
+++ b/include/linux/i2c/twl4030.h
@@ -220,19 +220,28 @@ int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes);
 
 /* Power bus message definitions */
 
-#define DEV_GRP_NULL		0x0
-#define DEV_GRP_P1		0x1
-#define DEV_GRP_P2		0x2
-#define DEV_GRP_P3		0x4
+/* The TWL4030/5030 splits its power-management resources (the various
+ * regulators, clock and reset lines) into 3 processor groups - P1, P2 and
+ * P3. These groups can then be configured to transition between sleep, wait-on
+ * and active states by sending messages to the power bus.  See Section 5.4.2
+ * Power Resources of TWL4030 TRM
+ */
 
-#define RES_GRP_RES		0x0
-#define RES_GRP_PP		0x1
-#define RES_GRP_RC		0x2
+/* Processor groups */
+#define DEV_GRP_NULL		0x0
+#define DEV_GRP_P1		0x1	/* P1: all OMAP devices */
+#define DEV_GRP_P2		0x2	/* P2: all Modem devices */
+#define DEV_GRP_P3		0x4	/* P3: all peripheral devices */
+
+/* Resource groups */
+#define RES_GRP_RES		0x0	/* Reserved */
+#define RES_GRP_PP		0x1	/* Power providers */
+#define RES_GRP_RC		0x2	/* Reset and control */
 #define RES_GRP_PP_RC		0x3
-#define RES_GRP_PR		0x4
+#define RES_GRP_PR		0x4	/* Power references */
 #define RES_GRP_PP_PR		0x5
 #define RES_GRP_RC_PR		0x6
-#define RES_GRP_ALL		0x7
+#define RES_GRP_ALL		0x7	/* All resource groups */
 
 #define RES_TYPE2_R0		0x0
 
@@ -243,6 +252,41 @@ int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes);
 #define RES_STATE_SLEEP		0x8
 #define RES_STATE_OFF		0x0
 
+/* Power resources */
+
+/* Power providers */
+#define RES_VAUX1               1
+#define RES_VAUX2               2
+#define RES_VAUX3               3
+#define RES_VAUX4               4
+#define RES_VMMC1               5
+#define RES_VMMC2               6
+#define RES_VPLL1               7
+#define RES_VPLL2               8
+#define RES_VSIM                9
+#define RES_VDAC                10
+#define RES_VINTANA1            11
+#define RES_VINTANA2            12
+#define RES_VINTDIG             13
+#define RES_VIO                 14
+#define RES_VDD1                15
+#define RES_VDD2                16
+#define RES_VUSB_1V5            17
+#define RES_VUSB_1V8            18
+#define RES_VUSB_3V1            19
+#define RES_VUSBCP              20
+#define RES_REGEN               21
+/* Reset and control */
+#define RES_NRES_PWRON          22
+#define RES_CLKEN               23
+#define RES_SYSEN               24
+#define RES_HFCLKOUT            25
+#define RES_32KCLKOUT           26
+#define RES_RESET               27
+/* Power Reference */
+#define RES_Main_Ref            28
+
+#define TOTAL_RESOURCES		28
 /*
  * Power Bus Message Format ... these can be sent individually by Linux,
  * but are usually part of downloaded scripts that are run when various
@@ -320,6 +364,36 @@ struct twl4030_usb_data {
 	enum twl4030_usb_mode	usb_mode;
 };
 
+struct twl4030_ins {
+	u16 pmb_message;
+	u8 delay;
+};
+
+struct twl4030_script {
+	struct twl4030_ins *script;
+	unsigned size;
+	u8 flags;
+#define TWL4030_WRST_SCRIPT	(1<<0)
+#define TWL4030_WAKEUP12_SCRIPT	(1<<1)
+#define TWL4030_WAKEUP3_SCRIPT	(1<<2)
+#define TWL4030_SLEEP_SCRIPT	(1<<3)
+};
+
+struct twl4030_resconfig {
+	u8 resource;
+	u8 devgroup;	/* Processor group that Power resource belongs to */
+	u8 type;	/* Power resource addressed, 6 / broadcast message */
+	u8 type2;	/* Power resource addressed, 3 / broadcast message */
+};
+
+struct twl4030_power_data {
+	struct twl4030_script **scripts;
+	unsigned num;
+	struct twl4030_resconfig *resource_config;
+};
+
+extern void twl4030_power_init(struct twl4030_power_data *triton2_scripts);
+
 struct twl4030_platform_data {
 	unsigned				irq_base, irq_end;
 	struct twl4030_bci_platform_data	*bci;
@@ -327,6 +401,7 @@ struct twl4030_platform_data {
 	struct twl4030_madc_platform_data	*madc;
 	struct twl4030_keypad_data		*keypad;
 	struct twl4030_usb_data			*usb;
+	struct twl4030_power_data		*power;
 
 	/* LDO regulators */
 	struct regulator_init_data		*vdac;
@@ -357,7 +432,6 @@ int twl4030_sih_setup(int module);
 #define TWL4030_VAUX3_DEV_GRP		0x1F
 #define TWL4030_VAUX3_DEDICATED		0x22
 
-
 #if defined(CONFIG_TWL4030_BCI_BATTERY) || \
 	defined(CONFIG_TWL4030_BCI_BATTERY_MODULE)
 	extern int twl4030charger_usb_en(int enable);
-- 
1.6.3.3

Re: [PATCH 1/3] MFD: TWL4030: Add support for TWL4030/5030 dynamic power switching

[Samuel Ortiz]

Hi Amit,

On Mon, Aug 31, 2009 at 01:53:32PM +0300, Amit Kucheria wrote:
> On Fri, Aug 28, 2009 at 8:47 PM, Samuel Ortiz<sameo@linux.intel.com> wrote:
> > Hi Amit,
> >
> > On Mon, Aug 17, 2009 at 05:01:46PM +0300, Amit Kucheria wrote:
> >> +
> >> +#include <asm/mach-types.h>
> > You'll have to make your Kconfig entry depend on ARM if you want to include
> > this file. Too bad you need it just for the special sdp and ldp cases, but I
> > guess there's no other solution.
> >
> > Cheers,
> > Samuel.
> 
> Hi Samuel,
> 
> Modified patch with ARM dependency attached.
Thanks. All 3 patches finally applied to my for-next branch, thanks for your
work.

Cheers,
Samuel.


> Regards,
> Amit

> From ee0a4fefed7b1867234d96db6acbf62bbd60c0c0 Mon Sep 17 00:00:00 2001
> From: Amit Kucheria <amit.kucheria@verdurent.com>
> Date: Mon, 6 Jul 2009 16:42:37 +0300
> Subject: [PATCH 1/3] MFD: TWL4030: Add support for TWL4030/5030 dynamic power switching
> 
> The TWL4030/5030 family of multifunction devices allows board-specific
> control of the the various regulators, clock and reset lines through
> 'scripts' that are loaded into its memory. This allows for Dynamic Power
> Switching (DPS).
> 
> Implement board-independent core support for DPS that is then used by
> board-specific code to load custom DPS scripts.
> 
> Signed-off-by: Amit Kucheria <amit.kucheria@verdurent.com>
> Cc: sameo@linux.intel.com
> Cc: dbrownell@users.sourceforge.net
> Cc: linux-kernel@vger.kernel.org
> Cc: linux-omap@vger.kernel.org
> ---
>  drivers/mfd/Kconfig         |   13 ++
>  drivers/mfd/Makefile        |    1 +
>  drivers/mfd/twl4030-core.c  |   10 +
>  drivers/mfd/twl4030-power.c |  466 +++++++++++++++++++++++++++++++++++++++++++
>  include/linux/i2c/twl4030.h |   94 ++++++++-
>  5 files changed, 574 insertions(+), 10 deletions(-)
>  create mode 100644 drivers/mfd/twl4030-power.c
> 
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 491ac0f..c0f1695 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -108,6 +108,19 @@ config TWL4030_CORE
>  	  high speed USB OTG transceiver, an audio codec (on most
>  	  versions) and many other features.
>  
> +config TWL4030_POWER
> +	bool "Support power resources on TWL4030 family chips"
> +	depends on TWL4030_CORE && ARM
> +	help
> +	  Say yes here if you want to use the power resources on the
> +	  TWL4030 family chips.  Most of these resources are regulators,
> +	  which have a separate driver; some are control signals, such
> +	  as clock request handshaking.
> +
> +	  This driver uses board-specific data to initialize the resources
> +	  and load scripts controling which resources are switched off/on
> +	  or reset when a sleep, wakeup or warm reset event occurs.
> +
>  config MFD_TMIO
>  	bool
>  	default n
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index 6f8a9a1..84b9eda 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -23,6 +23,7 @@ obj-$(CONFIG_TPS65010)		+= tps65010.o
>  obj-$(CONFIG_MENELAUS)		+= menelaus.o
>  
>  obj-$(CONFIG_TWL4030_CORE)	+= twl4030-core.o twl4030-irq.o
> +obj-$(CONFIG_TWL4030_POWER)    += twl4030-power.o
>  
>  obj-$(CONFIG_MFD_CORE)		+= mfd-core.o
>  
> diff --git a/drivers/mfd/twl4030-core.c b/drivers/mfd/twl4030-core.c
> index ca54996..28a45a3 100644
> --- a/drivers/mfd/twl4030-core.c
> +++ b/drivers/mfd/twl4030-core.c
> @@ -89,6 +89,12 @@
>  #define twl_has_madc()	false
>  #endif
>  
> +#ifdef CONFIG_TWL4030_POWER
> +#define twl_has_power()        true
> +#else
> +#define twl_has_power()        false
> +#endif
> +
>  #if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
>  #define twl_has_rtc()	true
>  #else
> @@ -788,6 +794,10 @@ twl4030_probe(struct i2c_client *client, const struct i2c_device_id *id)
>  	/* setup clock framework */
>  	clocks_init(&client->dev);
>  
> +	/* load power event scripts */
> +	if (twl_has_power() && pdata->power)
> +		twl4030_power_init(pdata->power);
> +
>  	/* Maybe init the T2 Interrupt subsystem */
>  	if (client->irq
>  			&& pdata->irq_base
> diff --git a/drivers/mfd/twl4030-power.c b/drivers/mfd/twl4030-power.c
> new file mode 100644
> index 0000000..e7688b0
> --- /dev/null
> +++ b/drivers/mfd/twl4030-power.c
> @@ -0,0 +1,466 @@
> +/*
> + * linux/drivers/i2c/chips/twl4030-power.c
> + *
> + * Handle TWL4030 Power initialization
> + *
> + * Copyright (C) 2008 Nokia Corporation
> + * Copyright (C) 2006 Texas Instruments, Inc
> + *
> + * Written by 	Kalle Jokiniemi
> + *		Peter De Schrijver <peter.de-schrijver@nokia.com>
> + * Several fixes by Amit Kucheria <amit.kucheria@verdurent.com>
> + *
> + * This file is subject to the terms and conditions of the GNU General
> + * Public License. See the file "COPYING" in the main directory of this
> + * archive for more details.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
> + */
> +
> +#include <linux/module.h>
> +#include <linux/pm.h>
> +#include <linux/i2c/twl4030.h>
> +#include <linux/platform_device.h>
> +
> +#include <asm/mach-types.h>
> +
> +static u8 twl4030_start_script_address = 0x2b;
> +
> +#define PWR_P1_SW_EVENTS	0x10
> +#define PWR_DEVOFF	(1<<0)
> +
> +#define PHY_TO_OFF_PM_MASTER(p)		(p - 0x36)
> +#define PHY_TO_OFF_PM_RECEIVER(p)	(p - 0x5b)
> +
> +/* resource - hfclk */
> +#define R_HFCLKOUT_DEV_GRP 	PHY_TO_OFF_PM_RECEIVER(0xe6)
> +
> +/* PM events */
> +#define R_P1_SW_EVENTS		PHY_TO_OFF_PM_MASTER(0x46)
> +#define R_P2_SW_EVENTS		PHY_TO_OFF_PM_MASTER(0x47)
> +#define R_P3_SW_EVENTS		PHY_TO_OFF_PM_MASTER(0x48)
> +#define R_CFG_P1_TRANSITION	PHY_TO_OFF_PM_MASTER(0x36)
> +#define R_CFG_P2_TRANSITION	PHY_TO_OFF_PM_MASTER(0x37)
> +#define R_CFG_P3_TRANSITION	PHY_TO_OFF_PM_MASTER(0x38)
> +
> +#define LVL_WAKEUP	0x08
> +
> +#define ENABLE_WARMRESET (1<<4)
> +
> +#define END_OF_SCRIPT		0x3f
> +
> +#define R_SEQ_ADD_A2S		PHY_TO_OFF_PM_MASTER(0x55)
> +#define R_SEQ_ADD_S2A12		PHY_TO_OFF_PM_MASTER(0x56)
> +#define	R_SEQ_ADD_S2A3		PHY_TO_OFF_PM_MASTER(0x57)
> +#define	R_SEQ_ADD_WARM		PHY_TO_OFF_PM_MASTER(0x58)
> +#define R_MEMORY_ADDRESS	PHY_TO_OFF_PM_MASTER(0x59)
> +#define R_MEMORY_DATA		PHY_TO_OFF_PM_MASTER(0x5a)
> +
> +#define R_PROTECT_KEY		0x0E
> +#define KEY_1			0xC0
> +#define KEY_2			0x0C
> +
> +/* resource configuration registers */
> +
> +#define DEVGROUP_OFFSET		0
> +#define TYPE_OFFSET		1
> +
> +/* Bit positions */
> +#define DEVGROUP_SHIFT		5
> +#define DEVGROUP_MASK		(7 << DEVGROUP_SHIFT)
> +#define TYPE_SHIFT		0
> +#define TYPE_MASK		(7 << TYPE_SHIFT)
> +#define TYPE2_SHIFT		3
> +#define TYPE2_MASK		(3 << TYPE2_SHIFT)
> +
> +static u8 res_config_addrs[] = {
> +	[RES_VAUX1]	= 0x17,
> +	[RES_VAUX2]	= 0x1b,
> +	[RES_VAUX3]	= 0x1f,
> +	[RES_VAUX4]	= 0x23,
> +	[RES_VMMC1]	= 0x27,
> +	[RES_VMMC2]	= 0x2b,
> +	[RES_VPLL1]	= 0x2f,
> +	[RES_VPLL2]	= 0x33,
> +	[RES_VSIM]	= 0x37,
> +	[RES_VDAC]	= 0x3b,
> +	[RES_VINTANA1]	= 0x3f,
> +	[RES_VINTANA2]	= 0x43,
> +	[RES_VINTDIG]	= 0x47,
> +	[RES_VIO]	= 0x4b,
> +	[RES_VDD1]	= 0x55,
> +	[RES_VDD2]	= 0x63,
> +	[RES_VUSB_1V5]	= 0x71,
> +	[RES_VUSB_1V8]	= 0x74,
> +	[RES_VUSB_3V1]	= 0x77,
> +	[RES_VUSBCP]	= 0x7a,
> +	[RES_REGEN]	= 0x7f,
> +	[RES_NRES_PWRON] = 0x82,
> +	[RES_CLKEN]	= 0x85,
> +	[RES_SYSEN]	= 0x88,
> +	[RES_HFCLKOUT]	= 0x8b,
> +	[RES_32KCLKOUT]	= 0x8e,
> +	[RES_RESET]	= 0x91,
> +	[RES_Main_Ref]	= 0x94,
> +};
> +
> +static int __init twl4030_write_script_byte(u8 address, u8 byte)
> +{
> +	int err;
> +
> +	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
> +				R_MEMORY_ADDRESS);
> +	if (err)
> +		goto out;
> +	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, byte,
> +				R_MEMORY_DATA);
> +out:
> +	return err;
> +}
> +
> +static int __init twl4030_write_script_ins(u8 address, u16 pmb_message,
> +					   u8 delay, u8 next)
> +{
> +	int err;
> +
> +	address *= 4;
> +	err = twl4030_write_script_byte(address++, pmb_message >> 8);
> +	if (err)
> +		goto out;
> +	err = twl4030_write_script_byte(address++, pmb_message & 0xff);
> +	if (err)
> +		goto out;
> +	err = twl4030_write_script_byte(address++, delay);
> +	if (err)
> +		goto out;
> +	err = twl4030_write_script_byte(address++, next);
> +out:
> +	return err;
> +}
> +
> +static int __init twl4030_write_script(u8 address, struct twl4030_ins *script,
> +				       int len)
> +{
> +	int err;
> +
> +	for (; len; len--, address++, script++) {
> +		if (len == 1) {
> +			err = twl4030_write_script_ins(address,
> +						script->pmb_message,
> +						script->delay,
> +						END_OF_SCRIPT);
> +			if (err)
> +				break;
> +		} else {
> +			err = twl4030_write_script_ins(address,
> +						script->pmb_message,
> +						script->delay,
> +						address + 1);
> +			if (err)
> +				break;
> +		}
> +	}
> +	return err;
> +}
> +
> +static int __init twl4030_config_wakeup3_sequence(u8 address)
> +{
> +	int err;
> +	u8 data;
> +
> +	/* Set SLEEP to ACTIVE SEQ address for P3 */
> +	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
> +				R_SEQ_ADD_S2A3);
> +	if (err)
> +		goto out;
> +
> +	/* P3 LVL_WAKEUP should be on LEVEL */
> +	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data,
> +				R_P3_SW_EVENTS);
> +	if (err)
> +		goto out;
> +	data |= LVL_WAKEUP;
> +	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data,
> +				R_P3_SW_EVENTS);
> +out:
> +	if (err)
> +		pr_err("TWL4030 wakeup sequence for P3 config error\n");
> +	return err;
> +}
> +
> +static int __init twl4030_config_wakeup12_sequence(u8 address)
> +{
> +	int err = 0;
> +	u8 data;
> +
> +	/* Set SLEEP to ACTIVE SEQ address for P1 and P2 */
> +	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
> +				R_SEQ_ADD_S2A12);
> +	if (err)
> +		goto out;
> +
> +	/* P1/P2 LVL_WAKEUP should be on LEVEL */
> +	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data,
> +				R_P1_SW_EVENTS);
> +	if (err)
> +		goto out;
> +
> +	data |= LVL_WAKEUP;
> +	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data,
> +				R_P1_SW_EVENTS);
> +	if (err)
> +		goto out;
> +
> +	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data,
> +				R_P2_SW_EVENTS);
> +	if (err)
> +		goto out;
> +
> +	data |= LVL_WAKEUP;
> +	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data,
> +				R_P2_SW_EVENTS);
> +	if (err)
> +		goto out;
> +
> +	if (machine_is_omap_3430sdp() || machine_is_omap_ldp()) {
> +		/* Disabling AC charger effect on sleep-active transitions */
> +		err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data,
> +					R_CFG_P1_TRANSITION);
> +		if (err)
> +			goto out;
> +		data &= ~(1<<1);
> +		err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data ,
> +					R_CFG_P1_TRANSITION);
> +		if (err)
> +			goto out;
> +	}
> +
> +out:
> +	if (err)
> +		pr_err("TWL4030 wakeup sequence for P1 and P2" \
> +			"config error\n");
> +	return err;
> +}
> +
> +static int __init twl4030_config_sleep_sequence(u8 address)
> +{
> +	int err;
> +
> +	/* Set ACTIVE to SLEEP SEQ address in T2 memory*/
> +	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
> +				R_SEQ_ADD_A2S);
> +
> +	if (err)
> +		pr_err("TWL4030 sleep sequence config error\n");
> +
> +	return err;
> +}
> +
> +static int __init twl4030_config_warmreset_sequence(u8 address)
> +{
> +	int err;
> +	u8 rd_data;
> +
> +	/* Set WARM RESET SEQ address for P1 */
> +	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
> +				R_SEQ_ADD_WARM);
> +	if (err)
> +		goto out;
> +
> +	/* P1/P2/P3 enable WARMRESET */
> +	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &rd_data,
> +				R_P1_SW_EVENTS);
> +	if (err)
> +		goto out;
> +
> +	rd_data |= ENABLE_WARMRESET;
> +	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, rd_data,
> +				R_P1_SW_EVENTS);
> +	if (err)
> +		goto out;
> +
> +	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &rd_data,
> +				R_P2_SW_EVENTS);
> +	if (err)
> +		goto out;
> +
> +	rd_data |= ENABLE_WARMRESET;
> +	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, rd_data,
> +				R_P2_SW_EVENTS);
> +	if (err)
> +		goto out;
> +
> +	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &rd_data,
> +				R_P3_SW_EVENTS);
> +	if (err)
> +		goto out;
> +
> +	rd_data |= ENABLE_WARMRESET;
> +	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, rd_data,
> +				R_P3_SW_EVENTS);
> +out:
> +	if (err)
> +		pr_err("TWL4030 warmreset seq config error\n");
> +	return err;
> +}
> +
> +static int __init twl4030_configure_resource(struct twl4030_resconfig *rconfig)
> +{
> +	int rconfig_addr;
> +	int err;
> +	u8 type;
> +	u8 grp;
> +
> +	if (rconfig->resource > TOTAL_RESOURCES) {
> +		pr_err("TWL4030 Resource %d does not exist\n",
> +			rconfig->resource);
> +		return -EINVAL;
> +	}
> +
> +	rconfig_addr = res_config_addrs[rconfig->resource];
> +
> +	/* Set resource group */
> +	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &grp,
> +				rconfig_addr + DEVGROUP_OFFSET);
> +	if (err) {
> +		pr_err("TWL4030 Resource %d group could not be read\n",
> +			rconfig->resource);
> +		return err;
> +	}
> +
> +	if (rconfig->devgroup >= 0) {
> +		grp &= ~DEVGROUP_MASK;
> +		grp |= rconfig->devgroup << DEVGROUP_SHIFT;
> +		err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
> +					grp, rconfig_addr + DEVGROUP_OFFSET);
> +		if (err < 0) {
> +			pr_err("TWL4030 failed to program devgroup\n");
> +			return err;
> +		}
> +	}
> +
> +	/* Set resource types */
> +	err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &type,
> +				rconfig_addr + TYPE_OFFSET);
> +	if (err < 0) {
> +		pr_err("TWL4030 Resource %d type could not be read\n",
> +			rconfig->resource);
> +		return err;
> +	}
> +
> +	if (rconfig->type >= 0) {
> +		type &= ~TYPE_MASK;
> +		type |= rconfig->type << TYPE_SHIFT;
> +	}
> +
> +	if (rconfig->type2 >= 0) {
> +		type &= ~TYPE2_MASK;
> +		type |= rconfig->type2 << TYPE2_SHIFT;
> +	}
> +
> +	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
> +				type, rconfig_addr + TYPE_OFFSET);
> +	if (err < 0) {
> +		pr_err("TWL4030 failed to program resource type\n");
> +		return err;
> +	}
> +
> +	return 0;
> +}
> +
> +static int __init load_twl4030_script(struct twl4030_script *tscript,
> +	       u8 address)
> +{
> +	int err;
> +
> +	/* Make sure the script isn't going beyond last valid address (0x3f) */
> +	if ((address + tscript->size) > END_OF_SCRIPT) {
> +		pr_err("TWL4030 scripts too big error\n");
> +		return -EINVAL;
> +	}
> +
> +	err = twl4030_write_script(address, tscript->script, tscript->size);
> +	if (err)
> +		goto out;
> +
> +	if (tscript->flags & TWL4030_WRST_SCRIPT) {
> +		err = twl4030_config_warmreset_sequence(address);
> +		if (err)
> +			goto out;
> +	}
> +	if (tscript->flags & TWL4030_WAKEUP12_SCRIPT) {
> +		err = twl4030_config_wakeup12_sequence(address);
> +		if (err)
> +			goto out;
> +	}
> +	if (tscript->flags & TWL4030_WAKEUP3_SCRIPT) {
> +		err = twl4030_config_wakeup3_sequence(address);
> +		if (err)
> +			goto out;
> +	}
> +	if (tscript->flags & TWL4030_SLEEP_SCRIPT)
> +		err = twl4030_config_sleep_sequence(address);
> +out:
> +	return err;
> +}
> +
> +void __init twl4030_power_init(struct twl4030_power_data *twl4030_scripts)
> +{
> +	int err = 0;
> +	int i;
> +	struct twl4030_resconfig *resconfig;
> +	u8 address = twl4030_start_script_address;
> +
> +	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_1,
> +				R_PROTECT_KEY);
> +	if (err)
> +		goto unlock;
> +
> +	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_2,
> +				R_PROTECT_KEY);
> +	if (err)
> +		goto unlock;
> +
> +	for (i = 0; i < twl4030_scripts->num; i++) {
> +		err = load_twl4030_script(twl4030_scripts->scripts[i], address);
> +		if (err)
> +			goto load;
> +		address += twl4030_scripts->scripts[i]->size;
> +	}
> +
> +	resconfig = twl4030_scripts->resource_config;
> +	if (resconfig) {
> +		while (resconfig->resource) {
> +			err = twl4030_configure_resource(resconfig);
> +			if (err)
> +				goto resource;
> +			resconfig++;
> +
> +		}
> +	}
> +
> +	err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0, R_PROTECT_KEY);
> +	if (err)
> +		pr_err("TWL4030 Unable to relock registers\n");
> +	return;
> +
> +unlock:
> +	if (err)
> +		pr_err("TWL4030 Unable to unlock registers\n");
> +	return;
> +load:
> +	if (err)
> +		pr_err("TWL4030 failed to load scripts\n");
> +	return;
> +resource:
> +	if (err)
> +		pr_err("TWL4030 failed to configure resource\n");
> +	return;
> +}
> diff --git a/include/linux/i2c/twl4030.h b/include/linux/i2c/twl4030.h
> index 0dc80ef..d0c24ad 100644
> --- a/include/linux/i2c/twl4030.h
> +++ b/include/linux/i2c/twl4030.h
> @@ -220,19 +220,28 @@ int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes);
>  
>  /* Power bus message definitions */
>  
> -#define DEV_GRP_NULL		0x0
> -#define DEV_GRP_P1		0x1
> -#define DEV_GRP_P2		0x2
> -#define DEV_GRP_P3		0x4
> +/* The TWL4030/5030 splits its power-management resources (the various
> + * regulators, clock and reset lines) into 3 processor groups - P1, P2 and
> + * P3. These groups can then be configured to transition between sleep, wait-on
> + * and active states by sending messages to the power bus.  See Section 5.4.2
> + * Power Resources of TWL4030 TRM
> + */
>  
> -#define RES_GRP_RES		0x0
> -#define RES_GRP_PP		0x1
> -#define RES_GRP_RC		0x2
> +/* Processor groups */
> +#define DEV_GRP_NULL		0x0
> +#define DEV_GRP_P1		0x1	/* P1: all OMAP devices */
> +#define DEV_GRP_P2		0x2	/* P2: all Modem devices */
> +#define DEV_GRP_P3		0x4	/* P3: all peripheral devices */
> +
> +/* Resource groups */
> +#define RES_GRP_RES		0x0	/* Reserved */
> +#define RES_GRP_PP		0x1	/* Power providers */
> +#define RES_GRP_RC		0x2	/* Reset and control */
>  #define RES_GRP_PP_RC		0x3
> -#define RES_GRP_PR		0x4
> +#define RES_GRP_PR		0x4	/* Power references */
>  #define RES_GRP_PP_PR		0x5
>  #define RES_GRP_RC_PR		0x6
> -#define RES_GRP_ALL		0x7
> +#define RES_GRP_ALL		0x7	/* All resource groups */
>  
>  #define RES_TYPE2_R0		0x0
>  
> @@ -243,6 +252,41 @@ int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes);
>  #define RES_STATE_SLEEP		0x8
>  #define RES_STATE_OFF		0x0
>  
> +/* Power resources */
> +
> +/* Power providers */
> +#define RES_VAUX1               1
> +#define RES_VAUX2               2
> +#define RES_VAUX3               3
> +#define RES_VAUX4               4
> +#define RES_VMMC1               5
> +#define RES_VMMC2               6
> +#define RES_VPLL1               7
> +#define RES_VPLL2               8
> +#define RES_VSIM                9
> +#define RES_VDAC                10
> +#define RES_VINTANA1            11
> +#define RES_VINTANA2            12
> +#define RES_VINTDIG             13
> +#define RES_VIO                 14
> +#define RES_VDD1                15
> +#define RES_VDD2                16
> +#define RES_VUSB_1V5            17
> +#define RES_VUSB_1V8            18
> +#define RES_VUSB_3V1            19
> +#define RES_VUSBCP              20
> +#define RES_REGEN               21
> +/* Reset and control */
> +#define RES_NRES_PWRON          22
> +#define RES_CLKEN               23
> +#define RES_SYSEN               24
> +#define RES_HFCLKOUT            25
> +#define RES_32KCLKOUT           26
> +#define RES_RESET               27
> +/* Power Reference */
> +#define RES_Main_Ref            28
> +
> +#define TOTAL_RESOURCES		28
>  /*
>   * Power Bus Message Format ... these can be sent individually by Linux,
>   * but are usually part of downloaded scripts that are run when various
> @@ -320,6 +364,36 @@ struct twl4030_usb_data {
>  	enum twl4030_usb_mode	usb_mode;
>  };
>  
> +struct twl4030_ins {
> +	u16 pmb_message;
> +	u8 delay;
> +};
> +
> +struct twl4030_script {
> +	struct twl4030_ins *script;
> +	unsigned size;
> +	u8 flags;
> +#define TWL4030_WRST_SCRIPT	(1<<0)
> +#define TWL4030_WAKEUP12_SCRIPT	(1<<1)
> +#define TWL4030_WAKEUP3_SCRIPT	(1<<2)
> +#define TWL4030_SLEEP_SCRIPT	(1<<3)
> +};
> +
> +struct twl4030_resconfig {
> +	u8 resource;
> +	u8 devgroup;	/* Processor group that Power resource belongs to */
> +	u8 type;	/* Power resource addressed, 6 / broadcast message */
> +	u8 type2;	/* Power resource addressed, 3 / broadcast message */
> +};
> +
> +struct twl4030_power_data {
> +	struct twl4030_script **scripts;
> +	unsigned num;
> +	struct twl4030_resconfig *resource_config;
> +};
> +
> +extern void twl4030_power_init(struct twl4030_power_data *triton2_scripts);
> +
>  struct twl4030_platform_data {
>  	unsigned				irq_base, irq_end;
>  	struct twl4030_bci_platform_data	*bci;
> @@ -327,6 +401,7 @@ struct twl4030_platform_data {
>  	struct twl4030_madc_platform_data	*madc;
>  	struct twl4030_keypad_data		*keypad;
>  	struct twl4030_usb_data			*usb;
> +	struct twl4030_power_data		*power;
>  
>  	/* LDO regulators */
>  	struct regulator_init_data		*vdac;
> @@ -357,7 +432,6 @@ int twl4030_sih_setup(int module);
>  #define TWL4030_VAUX3_DEV_GRP		0x1F
>  #define TWL4030_VAUX3_DEDICATED		0x22
>  
> -
>  #if defined(CONFIG_TWL4030_BCI_BATTERY) || \
>  	defined(CONFIG_TWL4030_BCI_BATTERY_MODULE)
>  	extern int twl4030charger_usb_en(int enable);
> -- 
> 1.6.3.3
> 


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