imx6: add pfuze100 regulator support

- backport driver
- apply patch to allow misprogrammed parts
- enable driver in kernel

Signed-off-by: Tim Harvey <tharvey@gateworks.com>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38422 3c298f89-4303-0410-b956-a3cf2f4a3e73

3 files changed, 543 insertions, 0 deletions

diff --git a/target/linux/imx6/config-3.10 b/target/linux/imx6/config-3.10
index 883695a6a8..0df9fabf7f 100644
--- a/target/linux/imx6/config-3.10
+++ b/target/linux/imx6/config-3.10
@@ -293,6 +293,7 @@ CONFIG_REGULATOR=y
 CONFIG_REGULATOR_ANATOP=y
 # CONFIG_REGULATOR_DEBUG is not set
 # CONFIG_REGULATOR_DUMMY is not set
+CONFIG_REGULATOR_PFUZE100=y
 # CONFIG_REGULATOR_USERSPACE_CONSUMER is not set
 # CONFIG_RFKILL_REGULATOR is not set
 CONFIG_RFS_ACCEL=y
diff --git a/target/linux/imx6/patches-3.10/0020-pfuze100-regulator.patch b/target/linux/imx6/patches-3.10/0020-pfuze100-regulator.patch
new file mode 100644
index 0000000000..1e1294a443
--- /dev/null
+++ b/target/linux/imx6/patches-3.10/0020-pfuze100-regulator.patch
@@ -0,0 +1,522 @@
+--- a/drivers/regulator/Kconfig
++++ b/drivers/regulator/Kconfig
+@@ -300,6 +300,14 @@ config REGULATOR_PCF50633
+ 	 Say Y here to support the voltage regulators and convertors
+ 	 on PCF50633
+ 
++config REGULATOR_PFUZE100
++	tristate "Support regulators on Freescale PFUZE100 PMIC"
++	depends on I2C
++	select REGMAP_I2C
++	help
++	  Say y here to support the regulators found on the Freescale PFUZE100
++	  PMIC.
++
+ config REGULATOR_RC5T583
+ 	tristate "RICOH RC5T583 Power regulators"
+ 	depends on MFD_RC5T583
+--- a/drivers/regulator/Makefile
++++ b/drivers/regulator/Makefile
+@@ -45,6 +45,7 @@ obj-$(CONFIG_REGULATOR_MC13783) += mc137
+ obj-$(CONFIG_REGULATOR_MC13892) += mc13892-regulator.o
+ obj-$(CONFIG_REGULATOR_MC13XXX_CORE) +=  mc13xxx-regulator-core.o
+ obj-$(CONFIG_REGULATOR_PALMAS) += palmas-regulator.o
++obj-$(CONFIG_REGULATOR_PFUZE100) += pfuze100-regulator.o
+ obj-$(CONFIG_REGULATOR_TPS51632) += tps51632-regulator.o
+ obj-$(CONFIG_REGULATOR_PCAP) += pcap-regulator.o
+ obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o
+--- /dev/null
++++ b/drivers/regulator/pfuze100-regulator.c
+@@ -0,0 +1,445 @@
++/*
++ * Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * 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/kernel.h>
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/err.h>
++#include <linux/of.h>
++#include <linux/of_device.h>
++#include <linux/regulator/of_regulator.h>
++#include <linux/platform_device.h>
++#include <linux/regulator/driver.h>
++#include <linux/regulator/machine.h>
++#include <linux/regulator/pfuze100.h>
++#include <linux/i2c.h>
++#include <linux/slab.h>
++#include <linux/regmap.h>
++
++#define PFUZE_NUMREGS		128
++#define PFUZE100_VOL_OFFSET	0
++#define PFUZE100_STANDBY_OFFSET	1
++#define PFUZE100_MODE_OFFSET	3
++#define PFUZE100_CONF_OFFSET	4
++
++#define PFUZE100_DEVICEID	0x0
++#define PFUZE100_REVID		0x3
++#define PFUZE100_FABID		0x3
++
++#define PFUZE100_SW1ABVOL	0x20
++#define PFUZE100_SW1CVOL	0x2e
++#define PFUZE100_SW2VOL		0x35
++#define PFUZE100_SW3AVOL	0x3c
++#define PFUZE100_SW3BVOL	0x43
++#define PFUZE100_SW4VOL		0x4a
++#define PFUZE100_SWBSTCON1	0x66
++#define PFUZE100_VREFDDRCON	0x6a
++#define PFUZE100_VSNVSVOL	0x6b
++#define PFUZE100_VGEN1VOL	0x6c
++#define PFUZE100_VGEN2VOL	0x6d
++#define PFUZE100_VGEN3VOL	0x6e
++#define PFUZE100_VGEN4VOL	0x6f
++#define PFUZE100_VGEN5VOL	0x70
++#define PFUZE100_VGEN6VOL	0x71
++
++struct pfuze_regulator {
++	struct regulator_desc desc;
++	unsigned char stby_reg;
++	unsigned char stby_mask;
++};
++
++struct pfuze_chip {
++	struct regmap *regmap;
++	struct device *dev;
++	struct pfuze_regulator regulator_descs[PFUZE100_MAX_REGULATOR];
++	struct regulator_dev *regulators[PFUZE100_MAX_REGULATOR];
++};
++
++static const int pfuze100_swbst[] = {
++	5000000, 5050000, 5100000, 5150000,
++};
++
++static const int pfuze100_vsnvs[] = {
++	1000000, 1100000, 1200000, 1300000, 1500000, 1800000, 3000000,
++};
++
++static const struct i2c_device_id pfuze_device_id[] = {
++	{.name = "pfuze100"},
++	{},
++};
++MODULE_DEVICE_TABLE(i2c, pfuze_device_id);
++
++static const struct of_device_id pfuze_dt_ids[] = {
++	{ .compatible = "fsl,pfuze100" },
++	{},
++};
++MODULE_DEVICE_TABLE(of, pfuze_dt_ids);
++
++static int pfuze100_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
++{
++	struct pfuze_chip *pfuze100 = rdev_get_drvdata(rdev);
++	int id = rdev->desc->id;
++	unsigned int ramp_bits;
++	int ret;
++
++	if (id < PFUZE100_SWBST) {
++		ramp_delay = 12500 / ramp_delay;
++		ramp_bits = (ramp_delay >> 1) - (ramp_delay >> 3);
++		ret = regmap_update_bits(pfuze100->regmap,
++					 rdev->desc->vsel_reg + 4,
++					 0xc0, ramp_bits << 6);
++		if (ret < 0)
++			dev_err(pfuze100->dev, "ramp failed, err %d\n", ret);
++	} else
++		ret = -EACCES;
++
++	return ret;
++}
++
++static struct regulator_ops pfuze100_ldo_regulator_ops = {
++	.enable = regulator_enable_regmap,
++	.disable = regulator_disable_regmap,
++	.is_enabled = regulator_is_enabled_regmap,
++	.list_voltage = regulator_list_voltage_linear,
++	.set_voltage_sel = regulator_set_voltage_sel_regmap,
++	.get_voltage_sel = regulator_get_voltage_sel_regmap,
++};
++
++static struct regulator_ops pfuze100_fixed_regulator_ops = {
++	.list_voltage = regulator_list_voltage_linear,
++};
++
++static struct regulator_ops pfuze100_sw_regulator_ops = {
++	.list_voltage = regulator_list_voltage_linear,
++	.set_voltage_sel = regulator_set_voltage_sel_regmap,
++	.get_voltage_sel = regulator_get_voltage_sel_regmap,
++	.set_voltage_time_sel = regulator_set_voltage_time_sel,
++	.set_ramp_delay = pfuze100_set_ramp_delay,
++};
++
++static struct regulator_ops pfuze100_swb_regulator_ops = {
++	.list_voltage = regulator_list_voltage_table,
++	.map_voltage = regulator_map_voltage_ascend,
++	.set_voltage_sel = regulator_set_voltage_sel_regmap,
++	.get_voltage_sel = regulator_get_voltage_sel_regmap,
++
++};
++
++#define PFUZE100_FIXED_REG(_name, base, voltage)	\
++	[PFUZE100_ ## _name] = {	\
++		.desc = {	\
++			.name = #_name,	\
++			.n_voltages = 1,	\
++			.ops = &pfuze100_fixed_regulator_ops,	\
++			.type = REGULATOR_VOLTAGE,	\
++			.id = PFUZE100_ ## _name,	\
++			.owner = THIS_MODULE,	\
++			.min_uV = (voltage),	\
++			.enable_reg = (base),	\
++			.enable_mask = 0x10,	\
++		},	\
++	}
++
++#define PFUZE100_SW_REG(_name, base, min, max, step)	\
++	[PFUZE100_ ## _name] = {	\
++		.desc = {	\
++			.name = #_name,\
++			.n_voltages = ((max) - (min)) / (step) + 1,	\
++			.ops = &pfuze100_sw_regulator_ops,	\
++			.type = REGULATOR_VOLTAGE,	\
++			.id = PFUZE100_ ## _name,	\
++			.owner = THIS_MODULE,	\
++			.min_uV = (min),	\
++			.uV_step = (step),	\
++			.vsel_reg = (base) + PFUZE100_VOL_OFFSET,	\
++			.vsel_mask = 0x3f,	\
++		},	\
++		.stby_reg = (base) + PFUZE100_STANDBY_OFFSET,	\
++		.stby_mask = 0x3f,	\
++	}
++
++#define PFUZE100_SWB_REG(_name, base, mask, voltages)	\
++	[PFUZE100_ ## _name] = {	\
++		.desc = {	\
++			.name = #_name,	\
++			.n_voltages = ARRAY_SIZE(voltages),	\
++			.ops = &pfuze100_swb_regulator_ops,	\
++			.type = REGULATOR_VOLTAGE,	\
++			.id = PFUZE100_ ## _name,	\
++			.owner = THIS_MODULE,	\
++			.volt_table = voltages,	\
++			.vsel_reg = (base),	\
++			.vsel_mask = (mask),	\
++		},	\
++	}
++
++#define PFUZE100_VGEN_REG(_name, base, min, max, step)	\
++	[PFUZE100_ ## _name] = {	\
++		.desc = {	\
++			.name = #_name,	\
++			.n_voltages = ((max) - (min)) / (step) + 1,	\
++			.ops = &pfuze100_ldo_regulator_ops,	\
++			.type = REGULATOR_VOLTAGE,	\
++			.id = PFUZE100_ ## _name,	\
++			.owner = THIS_MODULE,	\
++			.min_uV = (min),	\
++			.uV_step = (step),	\
++			.vsel_reg = (base),	\
++			.vsel_mask = 0xf,	\
++			.enable_reg = (base),	\
++			.enable_mask = 0x10,	\
++		},	\
++		.stby_reg = (base),	\
++		.stby_mask = 0x20,	\
++	}
++
++static struct pfuze_regulator pfuze100_regulators[] = {
++	PFUZE100_SW_REG(SW1AB, PFUZE100_SW1ABVOL, 300000, 1875000, 25000),
++	PFUZE100_SW_REG(SW1C, PFUZE100_SW1CVOL, 300000, 1875000, 25000),
++	PFUZE100_SW_REG(SW2, PFUZE100_SW2VOL, 400000, 1975000, 25000),
++	PFUZE100_SW_REG(SW3A, PFUZE100_SW3AVOL, 400000, 1975000, 25000),
++	PFUZE100_SW_REG(SW3B, PFUZE100_SW3BVOL, 400000, 1975000, 25000),
++	PFUZE100_SW_REG(SW4, PFUZE100_SW4VOL, 400000, 1975000, 25000),
++	PFUZE100_SWB_REG(SWBST, PFUZE100_SWBSTCON1, 0x3 , pfuze100_swbst),
++	PFUZE100_SWB_REG(VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
++	PFUZE100_FIXED_REG(VREFDDR, PFUZE100_VREFDDRCON, 750000),
++	PFUZE100_VGEN_REG(VGEN1, PFUZE100_VGEN1VOL, 800000, 1550000, 50000),
++	PFUZE100_VGEN_REG(VGEN2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
++	PFUZE100_VGEN_REG(VGEN3, PFUZE100_VGEN3VOL, 1800000, 3300000, 100000),
++	PFUZE100_VGEN_REG(VGEN4, PFUZE100_VGEN4VOL, 1800000, 3300000, 100000),
++	PFUZE100_VGEN_REG(VGEN5, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
++	PFUZE100_VGEN_REG(VGEN6, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
++};
++
++#ifdef CONFIG_OF
++static struct of_regulator_match pfuze100_matches[] = {
++	{ .name = "sw1ab",	},
++	{ .name = "sw1c",	},
++	{ .name = "sw2",	},
++	{ .name = "sw3a",	},
++	{ .name = "sw3b",	},
++	{ .name = "sw4",	},
++	{ .name = "swbst",	},
++	{ .name = "vsnvs",	},
++	{ .name = "vrefddr",	},
++	{ .name = "vgen1",	},
++	{ .name = "vgen2",	},
++	{ .name = "vgen3",	},
++	{ .name = "vgen4",	},
++	{ .name = "vgen5",	},
++	{ .name = "vgen6",	},
++};
++
++static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
++{
++	struct device *dev = chip->dev;
++	struct device_node *np, *parent;
++	int ret;
++
++	np = of_node_get(dev->parent->of_node);
++	if (!np)
++		return 0;
++
++	parent = of_find_node_by_name(np, "regulators");
++	if (!parent) {
++		dev_err(dev, "regulators node not found\n");
++		return -EINVAL;
++	}
++
++	ret = of_regulator_match(dev, parent, pfuze100_matches,
++				 ARRAY_SIZE(pfuze100_matches));
++
++	of_node_put(parent);
++	if (ret < 0) {
++		dev_err(dev, "Error parsing regulator init data: %d\n",
++			ret);
++		return ret;
++	}
++
++	return 0;
++}
++
++static inline struct regulator_init_data *match_init_data(int index)
++{
++	return pfuze100_matches[index].init_data;
++}
++
++static inline struct device_node *match_of_node(int index)
++{
++	return pfuze100_matches[index].of_node;
++}
++#else
++static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
++{
++	return 0;
++}
++
++static inline struct regulator_init_data *match_init_data(int index)
++{
++	return NULL;
++}
++
++static inline struct device_node *match_of_node(int index)
++{
++	return NULL;
++}
++#endif
++
++static int pfuze_identify(struct pfuze_chip *pfuze_chip)
++{
++	unsigned int value;
++	int ret;
++
++	ret = regmap_read(pfuze_chip->regmap, PFUZE100_DEVICEID, &value);
++	if (ret)
++		return ret;
++
++	if (value & 0x0f) {
++		dev_warn(pfuze_chip->dev, "Illegal ID: %x\n", value);
++		return -ENODEV;
++	}
++
++	ret = regmap_read(pfuze_chip->regmap, PFUZE100_REVID, &value);
++	if (ret)
++		return ret;
++	dev_info(pfuze_chip->dev,
++		 "Full lay: %x, Metal lay: %x\n",
++		 (value & 0xf0) >> 4, value & 0x0f);
++
++	ret = regmap_read(pfuze_chip->regmap, PFUZE100_FABID, &value);
++	if (ret)
++		return ret;
++	dev_info(pfuze_chip->dev, "FAB: %x, FIN: %x\n",
++		 (value & 0xc) >> 2, value & 0x3);
++
++	return 0;
++}
++
++static const struct regmap_config pfuze_regmap_config = {
++	.reg_bits = 8,
++	.val_bits = 8,
++	.max_register = PFUZE_NUMREGS - 1,
++	.cache_type = REGCACHE_RBTREE,
++};
++
++static int pfuze100_regulator_probe(struct i2c_client *client,
++				    const struct i2c_device_id *id)
++{
++	struct pfuze_chip *pfuze_chip;
++	struct pfuze_regulator_platform_data *pdata =
++	    dev_get_platdata(&client->dev);
++	struct regulator_config config = { };
++	int i, ret;
++
++	pfuze_chip = devm_kzalloc(&client->dev, sizeof(*pfuze_chip),
++			GFP_KERNEL);
++	if (!pfuze_chip)
++		return -ENOMEM;
++
++	i2c_set_clientdata(client, pfuze_chip);
++
++	memcpy(pfuze_chip->regulator_descs, pfuze100_regulators,
++		sizeof(pfuze_chip->regulator_descs));
++
++	pfuze_chip->dev = &client->dev;
++
++	pfuze_chip->regmap = devm_regmap_init_i2c(client, &pfuze_regmap_config);
++	if (IS_ERR(pfuze_chip->regmap)) {
++		ret = PTR_ERR(pfuze_chip->regmap);
++		dev_err(&client->dev,
++			"regmap allocation failed with err %d\n", ret);
++		return ret;
++	}
++
++	ret = pfuze_identify(pfuze_chip);
++	if (ret) {
++		dev_err(&client->dev, "unrecognized pfuze chip ID!\n");
++		return ret;
++	}
++
++	ret = pfuze_parse_regulators_dt(pfuze_chip);
++	if (ret)
++		return ret;
++
++	for (i = 0; i < PFUZE100_MAX_REGULATOR; i++) {
++		struct regulator_init_data *init_data;
++		struct regulator_desc *desc;
++		int val;
++
++		desc = &pfuze_chip->regulator_descs[i].desc;
++
++		if (pdata)
++			init_data = pdata->init_data[i];
++		else
++			init_data = match_init_data(i);
++
++		/* SW2~SW4 high bit check and modify the voltage value table */
++		if (i > PFUZE100_SW1C && i < PFUZE100_SWBST) {
++			regmap_read(pfuze_chip->regmap, desc->vsel_reg, &val);
++			if (val & 0x40) {
++				desc->min_uV = 800000;
++				desc->uV_step = 50000;
++				desc->n_voltages = 51;
++			}
++		}
++
++		config.dev = &client->dev;
++		config.init_data = init_data;
++		config.driver_data = pfuze_chip;
++		config.of_node = match_of_node(i);
++
++		pfuze_chip->regulators[i] = regulator_register(desc, &config);
++		if (IS_ERR(pfuze_chip->regulators[i])) {
++			dev_err(&client->dev, "register regulator%s failed\n",
++				pfuze100_regulators[i].desc.name);
++			ret = PTR_ERR(pfuze_chip->regulators[i]);
++			while (--i >= 0)
++				regulator_unregister(pfuze_chip->regulators[i]);
++			return ret;
++		}
++	}
++
++	return 0;
++}
++
++static int pfuze100_regulator_remove(struct i2c_client *client)
++{
++	int i;
++	struct pfuze_chip *pfuze_chip = i2c_get_clientdata(client);
++
++	for (i = 0; i < PFUZE100_MAX_REGULATOR; i++)
++		regulator_unregister(pfuze_chip->regulators[i]);
++
++	return 0;
++}
++
++static struct i2c_driver pfuze_driver = {
++	.id_table = pfuze_device_id,
++	.driver = {
++		.name = "pfuze100-regulator",
++		.owner = THIS_MODULE,
++		.of_match_table = pfuze_dt_ids,
++	},
++	.probe = pfuze100_regulator_probe,
++	.remove = pfuze100_regulator_remove,
++};
++module_i2c_driver(pfuze_driver);
++
++MODULE_AUTHOR("Robin Gong <b38343@freescale.com>");
++MODULE_DESCRIPTION("Regulator Driver for Freescale PFUZE100 PMIC");
++MODULE_LICENSE("GPL v2");
++MODULE_ALIAS("i2c:pfuze100-regulator");
+--- /dev/null
++++ b/include/linux/regulator/pfuze100.h
+@@ -0,0 +1,44 @@
++/*
++ * Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * 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.,
++ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
++ */
++#ifndef __LINUX_REG_PFUZE100_H
++#define __LINUX_REG_PFUZE100_H
++
++#define PFUZE100_SW1AB		0
++#define PFUZE100_SW1C		1
++#define PFUZE100_SW2		2
++#define PFUZE100_SW3A		3
++#define PFUZE100_SW3B		4
++#define PFUZE100_SW4		5
++#define PFUZE100_SWBST		6
++#define PFUZE100_VSNVS		7
++#define PFUZE100_VREFDDR	8
++#define PFUZE100_VGEN1		9
++#define PFUZE100_VGEN2		10
++#define PFUZE100_VGEN3		11
++#define PFUZE100_VGEN4		12
++#define PFUZE100_VGEN5		13
++#define PFUZE100_VGEN6		14
++#define PFUZE100_MAX_REGULATOR	15
++
++struct regulator_init_data;
++
++struct pfuze_regulator_platform_data {
++	struct regulator_init_data *init_data[PFUZE100_MAX_REGULATOR];
++};
++
++#endif /* __LINUX_REG_PFUZE100_H */
diff --git a/target/linux/imx6/patches-3.10/0021-pfuze100-allow-misprogrammed-id.patch b/target/linux/imx6/patches-3.10/0021-pfuze100-allow-misprogrammed-id.patch
new file mode 100644
index 0000000000..a9399a9297
--- /dev/null
+++ b/target/linux/imx6/patches-3.10/0021-pfuze100-allow-misprogrammed-id.patch
@@ -0,0 +1,20 @@
+--- a/drivers/regulator/pfuze100-regulator.c
++++ b/drivers/regulator/pfuze100-regulator.c
+@@ -308,9 +308,14 @@ static int pfuze_identify(struct pfuze_c
+ 	if (ret)
+ 		return ret;
+ 
+-	if (value & 0x0f) {
+-		dev_warn(pfuze_chip->dev, "Illegal ID: %x\n", value);
+-		return -ENODEV;
++	switch (value & 0xf) {
++		case 0x0:
++		/* Freescale misprogrammed 1-3% of parts prior to week 8 of 2013 as ID=8 */
++		case 0x8:
++			break;
++		default:
++			dev_warn(pfuze_chip->dev, "Illegal ID: %x\n", value);
++			return -ENODEV;
+ 	}
+ 
+ 	ret = regmap_read(pfuze_chip->regmap, PFUZE100_REVID, &value);