[PATCH v9 0/3] mfd: lp873x: Add lp873x PMIC support

[PATCH v9 0/3] mfd: lp873x: Add lp873x PMIC support

[Keerthy]

The LP873X chip is a power management IC for Portable Navigation Systems
    and Tablet Computing devices. It contains the following components:

     - Regulators.
     - Configurable General Purpose Output Signals(GPO).

PMIC interacts with the main processor through i2c. PMIC has
couple of LDOs(Linear Regulators), couple of BUCKs (Step-Down DC-DC
Converter Cores) and GPOs(General Purpose Output Signals).

The regulator patch is already queued:
http://marc.info/?l=linux-kernel&m=146298767110771&w=2

DT patch also queued.

Hence posting the remaining patches of the series with
the comments fixed on mfd driver.

Changes in v9:

Fixed comments on spacing, indentation and '\n' adding in the mfd
driver patch.
 
Changes in v8:

Defined Macros for hardcoded bit definitions in gpio driver.
Added Mark's ack for the regulator config change patch.

Chages in v7:

Reverted the dependency on http://www.gossamer-threads.com/lists/linux/kernel/2457552.

Changes in v6:

Series depends on: http://www.gossamer-threads.com/lists/linux/kernel/2457552
probe_new used.

Chnages in v4:

Added GPO driver support.

Keerthy (3):
  mfd: lp873x: Add lp873x PMIC support
  gpio: lp873x: Add support for General Purpose Outputs
  regulator: lp873x: Change the MFD config option as per latest naming

 drivers/gpio/Kconfig       |  10 ++
 drivers/gpio/Makefile      |   1 +
 drivers/gpio/gpio-lp873x.c | 193 ++++++++++++++++++++++++++++++++
 drivers/mfd/Kconfig        |  14 +++
 drivers/mfd/Makefile       |   2 +
 drivers/mfd/lp873x.c       |  99 +++++++++++++++++
 drivers/regulator/Kconfig  |   2 +-
 include/linux/mfd/lp873x.h | 269 +++++++++++++++++++++++++++++++++++++++++++++
 8 files changed, 589 insertions(+), 1 deletion(-)
 create mode 100644 drivers/gpio/gpio-lp873x.c
 create mode 100644 drivers/mfd/lp873x.c
 create mode 100644 include/linux/mfd/lp873x.h

-- 
1.9.1

[PATCH v9 0/3] mfd: lp873x: Add lp873x PMIC support

[Keerthy]

The LP873X chip is a power management IC for Portable Navigation Systems
    and Tablet Computing devices. It contains the following components:

     - Regulators.
     - Configurable General Purpose Output Signals(GPO).

PMIC interacts with the main processor through i2c. PMIC has
couple of LDOs(Linear Regulators), couple of BUCKs (Step-Down DC-DC
Converter Cores) and GPOs(General Purpose Output Signals).

The regulator patch is already queued:
http://marc.info/?l=linux-kernel&m=146298767110771&w=2

DT patch also queued.

Hence posting the remaining patches of the series with
the comments fixed on mfd driver.

Changes in v9:

Fixed comments on spacing, indentation and '\n' adding in the mfd
driver patch.
 
Changes in v8:

Defined Macros for hardcoded bit definitions in gpio driver.
Added Mark's ack for the regulator config change patch.

Chages in v7:

Reverted the dependency on http://www.gossamer-threads.com/lists/linux/kernel/2457552.

Changes in v6:

Series depends on: http://www.gossamer-threads.com/lists/linux/kernel/2457552
probe_new used.

Chnages in v4:

Added GPO driver support.

Keerthy (3):
  mfd: lp873x: Add lp873x PMIC support
  gpio: lp873x: Add support for General Purpose Outputs
  regulator: lp873x: Change the MFD config option as per latest naming

 drivers/gpio/Kconfig       |  10 ++
 drivers/gpio/Makefile      |   1 +
 drivers/gpio/gpio-lp873x.c | 193 ++++++++++++++++++++++++++++++++
 drivers/mfd/Kconfig        |  14 +++
 drivers/mfd/Makefile       |   2 +
 drivers/mfd/lp873x.c       |  99 +++++++++++++++++
 drivers/regulator/Kconfig  |   2 +-
 include/linux/mfd/lp873x.h | 269 +++++++++++++++++++++++++++++++++++++++++++++
 8 files changed, 589 insertions(+), 1 deletion(-)
 create mode 100644 drivers/gpio/gpio-lp873x.c
 create mode 100644 drivers/mfd/lp873x.c
 create mode 100644 include/linux/mfd/lp873x.h

-- 
1.9.1

[PATCH v9 1/3] mfd: lp873x: Add lp873x PMIC support

[Keerthy]

The LP873X chip is a power management IC for Portable Navigation Systems
    and Tablet Computing devices. It contains the following components:

     - Regulators.
     - Configurable General Purpose Output Signals (GPO).

PMIC interacts with the main processor through i2c. PMIC has
couple of LDOs (Linear Regulators), couple of BUCKs (Step-Down DC-DC
Converter Cores) and GPOs (General Purpose Output Signals).

Signed-off-by: Keerthy <j-keerthy@ti.com>
---
 drivers/mfd/Kconfig        |  14 +++
 drivers/mfd/Makefile       |   2 +
 drivers/mfd/lp873x.c       |  99 +++++++++++++++++
 include/linux/mfd/lp873x.h | 269 +++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 384 insertions(+)
 create mode 100644 drivers/mfd/lp873x.c
 create mode 100644 include/linux/mfd/lp873x.h

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 2d1fb64..69e51d0 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1224,6 +1224,20 @@ config MFD_TPS65217
 	  This driver can also be built as a module.  If so, the module
 	  will be called tps65217.
 
+config MFD_TI_LP873X
+	tristate "TI LP873X Power Management IC"
+	depends on I2C
+	select MFD_CORE
+	select REGMAP_I2C
+	help
+	  If you say yes here then you get support for the LP873X series of
+	  Power Management Integrated Circuits (PMIC).
+	  These include voltage regulators, thermal protection, configurable
+	  General Purpose Outputs (GPO) that are used in portable devices.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called lp873x.
+
 config MFD_TPS65218
 	tristate "TI TPS65218 Power Management chips"
 	depends on I2C
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 2ba3ba3..42acbcd 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -22,6 +22,8 @@ obj-$(CONFIG_HTC_EGPIO)		+= htc-egpio.o
 obj-$(CONFIG_HTC_PASIC3)	+= htc-pasic3.o
 obj-$(CONFIG_HTC_I2CPLD)	+= htc-i2cpld.o
 
+obj-$(CONFIG_MFD_TI_LP873X)	+= lp873x.o
+
 obj-$(CONFIG_MFD_DAVINCI_VOICECODEC)	+= davinci_voicecodec.o
 obj-$(CONFIG_MFD_DM355EVM_MSP)	+= dm355evm_msp.o
 obj-$(CONFIG_MFD_TI_AM335X_TSCADC)	+= ti_am335x_tscadc.o
diff --git a/drivers/mfd/lp873x.c b/drivers/mfd/lp873x.c
new file mode 100644
index 0000000..4ab2401
--- /dev/null
+++ b/drivers/mfd/lp873x.c
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * Author: Keerthy <j-keerthy@ti.com>
+ *
+ * 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 version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+
+#include <linux/mfd/lp873x.h>
+
+static const struct regmap_config lp873x_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = LP873X_REG_MAX,
+};
+
+static const struct mfd_cell lp873x_cells[] = {
+	{ .name = "lp873x-regulator", },
+	{ .name = "lp873x-gpio", },
+};
+
+static int lp873x_probe(struct i2c_client *client,
+			const struct i2c_device_id *ids)
+{
+	struct lp873x *lp873;
+	int ret;
+	unsigned int otpid;
+
+	lp873 = devm_kzalloc(&client->dev, sizeof(*lp873), GFP_KERNEL);
+	if (!lp873)
+		return -ENOMEM;
+
+	lp873->dev = &client->dev;
+
+	lp873->regmap = devm_regmap_init_i2c(client, &lp873x_regmap_config);
+	if (IS_ERR(lp873->regmap)) {
+		ret = PTR_ERR(lp873->regmap);
+		dev_err(lp873->dev,
+			"Failed to initialize register map: %d\n", ret);
+		return ret;
+	}
+
+	mutex_init(&lp873->lock);
+
+	ret = regmap_read(lp873->regmap, LP873X_REG_OTP_REV, &otpid);
+	if (ret) {
+		dev_err(lp873->dev, "Failed to read OTP ID\n");
+		return ret;
+	}
+
+	lp873->rev = otpid & LP873X_OTP_REV_OTP_ID;
+
+	i2c_set_clientdata(client, lp873);
+
+	ret = mfd_add_devices(lp873->dev, PLATFORM_DEVID_AUTO, lp873x_cells,
+			      ARRAY_SIZE(lp873x_cells), NULL, 0, NULL);
+
+	return ret;
+}
+
+static const struct of_device_id of_lp873x_match_table[] = {
+	{ .compatible = "ti,lp8733", },
+	{ .compatible = "ti,lp8732", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, of_lp873x_match_table);
+
+static const struct i2c_device_id lp873x_id_table[] = {
+	{ "lp873x", 0 },
+	{ },
+};
+MODULE_DEVICE_TABLE(i2c, lp873x_id_table);
+
+static struct i2c_driver lp873x_driver = {
+	.driver	= {
+		.name	= "lp873x",
+		.of_match_table = of_lp873x_match_table,
+	},
+	.probe		= lp873x_probe,
+	.id_table	= lp873x_id_table,
+};
+module_i2c_driver(lp873x_driver);
+
+MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
+MODULE_DESCRIPTION("LP873X chip family Multi-Function Device driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mfd/lp873x.h b/include/linux/mfd/lp873x.h
new file mode 100644
index 0000000..fc46f8a
--- /dev/null
+++ b/include/linux/mfd/lp873x.h
@@ -0,0 +1,269 @@
+/*
+ * Functions to access LP873X power management chip.
+ *
+ * Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * 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 version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __LINUX_MFD_LP873X_H
+#define __LINUX_MFD_LP873X_H
+
+#include <linux/i2c.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+
+/* LP873x chip id list */
+#define LP873X			0x00
+
+/* All register addresses */
+#define LP873X_REG_DEV_REV		0X00
+#define LP873X_REG_OTP_REV		0X01
+#define LP873X_REG_BUCK0_CTRL_1		0X02
+#define LP873X_REG_BUCK0_CTRL_2		0X03
+#define LP873X_REG_BUCK1_CTRL_1		0X04
+#define LP873X_REG_BUCK1_CTRL_2		0X05
+#define LP873X_REG_BUCK0_VOUT		0X06
+#define LP873X_REG_BUCK1_VOUT		0X07
+#define LP873X_REG_LDO0_CTRL		0X08
+#define LP873X_REG_LDO1_CTRL            0X09
+#define LP873X_REG_LDO0_VOUT		0X0A
+#define LP873X_REG_LDO1_VOUT		0X0B
+#define LP873X_REG_BUCK0_DELAY		0X0C
+#define LP873X_REG_BUCK1_DELAY		0X0D
+#define LP873X_REG_LDO0_DELAY		0X0E
+#define LP873X_REG_LDO1_DELAY		0X0F
+#define LP873X_REG_GPO_DELAY		0X10
+#define LP873X_REG_GPO2_DELAY		0X11
+#define LP873X_REG_GPO_CTRL		0X12
+#define LP873X_REG_CONFIG		0X13
+#define LP873X_REG_PLL_CTRL		0X14
+#define LP873X_REG_PGOOD_CTRL1		0X15
+#define LP873X_REG_PGOOD_CTRL2		0X16
+#define LP873X_REG_PG_FAULT		0X17
+#define LP873X_REG_RESET		0X18
+#define LP873X_REG_INT_TOP_1		0X19
+#define LP873X_REG_INT_TOP_2		0X1A
+#define LP873X_REG_INT_BUCK		0X1B
+#define LP873X_REG_INT_LDO		0X1C
+#define LP873X_REG_TOP_STAT		0X1D
+#define LP873X_REG_BUCK_STAT		0X1E
+#define LP873X_REG_LDO_STAT		0x1F
+#define LP873X_REG_TOP_MASK_1		0x20
+#define LP873X_REG_TOP_MASK_2		0x21
+#define LP873X_REG_BUCK_MASK		0x22
+#define LP873X_REG_LDO_MASK		0x23
+#define LP873X_REG_SEL_I_LOAD		0x24
+#define LP873X_REG_I_LOAD_2		0x25
+#define LP873X_REG_I_LOAD_1		0x26
+
+#define LP873X_REG_MAX			LP873X_REG_I_LOAD_1
+
+/* Register field definitions */
+#define LP873X_DEV_REV_DEV_ID			0xC0
+#define LP873X_DEV_REV_ALL_LAYER		0x30
+#define LP873X_DEV_REV_METAL_LAYER		0x0F
+
+#define LP873X_OTP_REV_OTP_ID			0xFF
+
+#define LP873X_BUCK0_CTRL_1_BUCK0_FPWM		BIT(3)
+#define LP873X_BUCK0_CTRL_1_BUCK0_RDIS_EN	BIT(2)
+#define LP873X_BUCK0_CTRL_1_BUCK0_EN_PIN_CTRL	BIT(1)
+#define LP873X_BUCK0_CTRL_1_BUCK0_EN		BIT(0)
+
+#define LP873X_BUCK0_CTRL_2_BUCK0_ILIM		0x38
+#define LP873X_BUCK0_CTRL_2_BUCK0_SLEW_RATE	0x07
+
+#define LP873X_BUCK1_CTRL_1_BUCK1_FPWM		BIT(3)
+#define LP873X_BUCK1_CTRL_1_BUCK1_RDIS_EN	BIT(2)
+#define LP873X_BUCK1_CTRL_1_BUCK1_EN_PIN_CTRL	BIT(1)
+#define LP873X_BUCK1_CTRL_1_BUCK1_EN		BIT(0)
+
+#define LP873X_BUCK1_CTRL_2_BUCK1_ILIM		0x38
+#define LP873X_BUCK1_CTRL_2_BUCK1_SLEW_RATE	0x07
+
+#define LP873X_BUCK0_VOUT_BUCK0_VSET		0xFF
+
+#define LP873X_BUCK1_VOUT_BUCK1_VSET		0xFF
+
+#define LP873X_LDO0_CTRL_LDO0_RDIS_EN		BIT(2)
+#define LP873X_LDO0_CTRL_LDO0_EN_PIN_CTRL	BIT(1)
+#define LP873X_LDO0_CTRL_LDO0_EN		BIT(0)
+
+#define LP873X_LDO1_CTRL_LDO1_RDIS_EN		BIT(2)
+#define LP873X_LDO1_CTRL_LDO1_EN_PIN_CTRL	BIT(1)
+#define LP873X_LDO1_CTRL_LDO1_EN		BIT(0)
+
+#define LP873X_LDO0_VOUT_LDO0_VSET		0x1F
+
+#define LP873X_LDO1_VOUT_LDO1_VSET		0x1F
+
+#define LP873X_BUCK0_DELAY_BUCK0_SD_DELAY	0xF0
+#define LP873X_BUCK0_DELAY_BUCK0_SU_DELAY	0x0F
+
+#define LP873X_BUCK1_DELAY_BUCK1_SD_DELAY	0xF0
+#define LP873X_BUCK1_DELAY_BUCK1_SU_DELAY	0x0F
+
+#define LP873X_LDO0_DELAY_LDO0_SD_DELAY	0xF0
+#define LP873X_LDO0_DELAY_LDO0_SU_DELAY	0x0F
+
+#define LP873X_LDO1_DELAY_LDO1_SD_DELAY	0xF0
+#define LP873X_LDO1_DELAY_LDO1_SU_DELAY	0x0F
+
+#define LP873X_GPO_DELAY_GPO_SD_DELAY		0xF0
+#define LP873X_GPO_DELAY_GPO_SU_DELAY		0x0F
+
+#define LP873X_GPO2_DELAY_GPO2_SD_DELAY	0xF0
+#define LP873X_GPO2_DELAY_GPO2_SU_DELAY	0x0F
+
+#define LP873X_GPO_CTRL_GPO2_OD		BIT(6)
+#define LP873X_GPO_CTRL_GPO2_EN_PIN_CTRL	BIT(5)
+#define LP873X_GPO_CTRL_GPO2_EN		BIT(4)
+#define LP873X_GPO_CTRL_GPO_OD			BIT(2)
+#define LP873X_GPO_CTRL_GPO_EN_PIN_CTRL	BIT(1)
+#define LP873X_GPO_CTRL_GPO_EN			BIT(0)
+
+#define LP873X_CONFIG_SU_DELAY_SEL		BIT(6)
+#define LP873X_CONFIG_SD_DELAY_SEL		BIT(5)
+#define LP873X_CONFIG_CLKIN_PIN_SEL		BIT(4)
+#define LP873X_CONFIG_CLKIN_PD			BIT(3)
+#define LP873X_CONFIG_EN_PD			BIT(2)
+#define LP873X_CONFIG_TDIE_WARN_LEVEL		BIT(1)
+#define LP873X_EN_SPREAD_SPEC			BIT(0)
+
+#define LP873X_PLL_CTRL_EN_PLL			BIT(6)
+#define LP873X_EXT_CLK_FREQ			0x1F
+
+#define LP873X_PGOOD_CTRL1_PGOOD_POL		BIT(7)
+#define LP873X_PGOOD_CTRL1_PGOOD_OD		BIT(6)
+#define LP873X_PGOOD_CTRL1_PGOOD_WINDOW_LDO	BIT(5)
+#define LP873X_PGOOD_CTRL1_PGOOD_WINDOWN_BUCK	BIT(4)
+#define LP873X_PGOOD_CTRL1_PGOOD_EN_PGOOD_LDO1	BIT(3)
+#define LP873X_PGOOD_CTRL1_PGOOD_EN_PGOOD_LDO0	BIT(2)
+#define LP873X_PGOOD_CTRL1_PGOOD_EN_PGOOD_BUCK1	BIT(1)
+#define LP873X_PGOOD_CTRL1_PGOOD_EN_PGOOD_BUCK0	BIT(0)
+
+#define LP873X_PGOOD_CTRL2_EN_PGOOD_TWARN	BIT(2)
+#define LP873X_PGOOD_CTRL2_EN_PG_FAULT_GATE	BIT(1)
+#define LP873X_PGOOD_CTRL2_PGOOD_MODE		BIT(0)
+
+#define LP873X_PG_FAULT_PG_FAULT_LDO1		BIT(3)
+#define LP873X_PG_FAULT_PG_FAULT_LDO0		BIT(2)
+#define LP873X_PG_FAULT_PG_FAULT_BUCK1		BIT(1)
+#define LP873X_PG_FAULT_PG_FAULT_BUCK0		BIT(0)
+
+#define LP873X_RESET_SW_RESET			BIT(0)
+
+#define LP873X_INT_TOP_1_PGOOD_INT		BIT(7)
+#define LP873X_INT_TOP_1_LDO_INT		BIT(6)
+#define LP873X_INT_TOP_1_BUCK_INT		BIT(5)
+#define LP873X_INT_TOP_1_SYNC_CLK_INT		BIT(4)
+#define LP873X_INT_TOP_1_TDIE_SD_INT		BIT(3)
+#define LP873X_INT_TOP_1_TDIE_WARN_INT		BIT(2)
+#define LP873X_INT_TOP_1_OVP_INT		BIT(1)
+#define LP873X_INT_TOP_1_I_MEAS_INT		BIT(0)
+
+#define LP873X_INT_TOP_2_RESET_REG_INT		BIT(0)
+
+#define LP873X_INT_BUCK_BUCK1_PG_INT		BIT(6)
+#define LP873X_INT_BUCK_BUCK1_SC_INT		BIT(5)
+#define LP873X_INT_BUCK_BUCK1_ILIM_INT		BIT(4)
+#define LP873X_INT_BUCK_BUCK0_PG_INT		BIT(2)
+#define LP873X_INT_BUCK_BUCK0_SC_INT		BIT(1)
+#define LP873X_INT_BUCK_BUCK0_ILIM_INT		BIT(0)
+
+#define LP873X_INT_LDO_LDO1_PG_INT		BIT(6)
+#define LP873X_INT_LDO_LDO1_SC_INT		BIT(5)
+#define LP873X_INT_LDO_LDO1_ILIM_INT		BIT(4)
+#define LP873X_INT_LDO_LDO0_PG_INT		BIT(2)
+#define LP873X_INT_LDO_LDO0_SC_INT		BIT(1)
+#define LP873X_INT_LDO_LDO0_ILIM_INT		BIT(0)
+
+#define LP873X_TOP_STAT_PGOOD_STAT		BIT(7)
+#define LP873X_TOP_STAT_SYNC_CLK_STAT		BIT(4)
+#define LP873X_TOP_STAT_TDIE_SD_STAT		BIT(3)
+#define LP873X_TOP_STAT_TDIE_WARN_STAT		BIT(2)
+#define LP873X_TOP_STAT_OVP_STAT		BIT(1)
+
+#define LP873X_BUCK_STAT_BUCK1_STAT		BIT(7)
+#define LP873X_BUCK_STAT_BUCK1_PG_STAT		BIT(6)
+#define LP873X_BUCK_STAT_BUCK1_ILIM_STAT	BIT(4)
+#define LP873X_BUCK_STAT_BUCK0_STAT		BIT(3)
+#define LP873X_BUCK_STAT_BUCK0_PG_STAT		BIT(2)
+#define LP873X_BUCK_STAT_BUCK0_ILIM_STAT	BIT(0)
+
+#define LP873X_LDO_STAT_LDO1_STAT		BIT(7)
+#define LP873X_LDO_STAT_LDO1_PG_STAT		BIT(6)
+#define LP873X_LDO_STAT_LDO1_ILIM_STAT		BIT(4)
+#define LP873X_LDO_STAT_LDO0_STAT		BIT(3)
+#define LP873X_LDO_STAT_LDO0_PG_STAT		BIT(2)
+#define LP873X_LDO_STAT_LDO0_ILIM_STAT		BIT(0)
+
+#define LP873X_TOP_MASK_1_PGOOD_INT_MASK	BIT(7)
+#define LP873X_TOP_MASK_1_SYNC_CLK_MASK	BIT(4)
+#define LP873X_TOP_MASK_1_TDIE_WARN_MASK	BIT(2)
+#define LP873X_TOP_MASK_1_I_MEAS_MASK		BIT(0)
+
+#define LP873X_TOP_MASK_2_RESET_REG_MASK	BIT(0)
+
+#define LP873X_BUCK_MASK_BUCK1_PGF_MASK	BIT(7)
+#define LP873X_BUCK_MASK_BUCK1_PGR_MASK	BIT(6)
+#define LP873X_BUCK_MASK_BUCK1_ILIM_MASK	BIT(4)
+#define LP873X_BUCK_MASK_BUCK0_PGF_MASK	BIT(3)
+#define LP873X_BUCK_MASK_BUCK0_PGR_MASK	BIT(2)
+#define LP873X_BUCK_MASK_BUCK0_ILIM_MASK	BIT(0)
+
+#define LP873X_LDO_MASK_LDO1_PGF_MASK		BIT(7)
+#define LP873X_LDO_MASK_LDO1_PGR_MASK		BIT(6)
+#define LP873X_LDO_MASK_LDO1_ILIM_MASK		BIT(4)
+#define LP873X_LDO_MASK_LDO0_PGF_MASK		BIT(3)
+#define LP873X_LDO_MASK_LDO0_PGR_MASK		BIT(2)
+#define LP873X_LDO_MASK_LDO0_ILIM_MASK		BIT(0)
+
+#define LP873X_SEL_I_LOAD_CURRENT_BUCK_SELECT	BIT(0)
+
+#define LP873X_I_LOAD_2_BUCK_LOAD_CURRENT	BIT(0)
+
+#define LP873X_I_LOAD_1_BUCK_LOAD_CURRENT	0xFF
+
+#define LP873X_MAX_REG_ID		LP873X_LDO_1
+
+/* Number of step-down converters available */
+#define LP873X_NUM_BUCK		2
+/* Number of LDO voltage regulators available */
+#define LP873X_NUM_LDO		2
+/* Number of total regulators available */
+#define LP873X_NUM_REGULATOR		(LP873X_NUM_BUCK + LP873X_NUM_LDO)
+
+enum lp873x_regulator_id {
+	/* BUCK's */
+	LP873X_BUCK_0,
+	LP873X_BUCK_1,
+	/* LDOs */
+	LP873X_LDO_0,
+	LP873X_LDO_1,
+};
+
+/**
+ * struct lp873x - state holder for the lp873x driver
+ * @dev: struct device pointer for MFD device
+ * @rev: revision of the lp873x
+ * @lock: lock guarding the data structure
+ * @regmap: register map of the lp873x PMIC
+ *
+ * Device data may be used to access the LP873X chip
+ */
+struct lp873x {
+	struct device *dev;
+	u8 rev;
+	struct mutex lock;	/* lock guarding the data structure */
+	struct regmap *regmap;
+};
+#endif /* __LINUX_MFD_LP873X_H */
-- 
1.9.1

[PATCH v9 1/3] mfd: lp873x: Add lp873x PMIC support

[Keerthy]

The LP873X chip is a power management IC for Portable Navigation Systems
    and Tablet Computing devices. It contains the following components:

     - Regulators.
     - Configurable General Purpose Output Signals (GPO).

PMIC interacts with the main processor through i2c. PMIC has
couple of LDOs (Linear Regulators), couple of BUCKs (Step-Down DC-DC
Converter Cores) and GPOs (General Purpose Output Signals).

Signed-off-by: Keerthy <j-keerthy@ti.com>
---
 drivers/mfd/Kconfig        |  14 +++
 drivers/mfd/Makefile       |   2 +
 drivers/mfd/lp873x.c       |  99 +++++++++++++++++
 include/linux/mfd/lp873x.h | 269 +++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 384 insertions(+)
 create mode 100644 drivers/mfd/lp873x.c
 create mode 100644 include/linux/mfd/lp873x.h

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 2d1fb64..69e51d0 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1224,6 +1224,20 @@ config MFD_TPS65217
 	  This driver can also be built as a module.  If so, the module
 	  will be called tps65217.
 
+config MFD_TI_LP873X
+	tristate "TI LP873X Power Management IC"
+	depends on I2C
+	select MFD_CORE
+	select REGMAP_I2C
+	help
+	  If you say yes here then you get support for the LP873X series of
+	  Power Management Integrated Circuits (PMIC).
+	  These include voltage regulators, thermal protection, configurable
+	  General Purpose Outputs (GPO) that are used in portable devices.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called lp873x.
+
 config MFD_TPS65218
 	tristate "TI TPS65218 Power Management chips"
 	depends on I2C
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 2ba3ba3..42acbcd 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -22,6 +22,8 @@ obj-$(CONFIG_HTC_EGPIO)		+= htc-egpio.o
 obj-$(CONFIG_HTC_PASIC3)	+= htc-pasic3.o
 obj-$(CONFIG_HTC_I2CPLD)	+= htc-i2cpld.o
 
+obj-$(CONFIG_MFD_TI_LP873X)	+= lp873x.o
+
 obj-$(CONFIG_MFD_DAVINCI_VOICECODEC)	+= davinci_voicecodec.o
 obj-$(CONFIG_MFD_DM355EVM_MSP)	+= dm355evm_msp.o
 obj-$(CONFIG_MFD_TI_AM335X_TSCADC)	+= ti_am335x_tscadc.o
diff --git a/drivers/mfd/lp873x.c b/drivers/mfd/lp873x.c
new file mode 100644
index 0000000..4ab2401
--- /dev/null
+++ b/drivers/mfd/lp873x.c
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * Author: Keerthy <j-keerthy@ti.com>
+ *
+ * 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 version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+
+#include <linux/mfd/lp873x.h>
+
+static const struct regmap_config lp873x_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = LP873X_REG_MAX,
+};
+
+static const struct mfd_cell lp873x_cells[] = {
+	{ .name = "lp873x-regulator", },
+	{ .name = "lp873x-gpio", },
+};
+
+static int lp873x_probe(struct i2c_client *client,
+			const struct i2c_device_id *ids)
+{
+	struct lp873x *lp873;
+	int ret;
+	unsigned int otpid;
+
+	lp873 = devm_kzalloc(&client->dev, sizeof(*lp873), GFP_KERNEL);
+	if (!lp873)
+		return -ENOMEM;
+
+	lp873->dev = &client->dev;
+
+	lp873->regmap = devm_regmap_init_i2c(client, &lp873x_regmap_config);
+	if (IS_ERR(lp873->regmap)) {
+		ret = PTR_ERR(lp873->regmap);
+		dev_err(lp873->dev,
+			"Failed to initialize register map: %d\n", ret);
+		return ret;
+	}
+
+	mutex_init(&lp873->lock);
+
+	ret = regmap_read(lp873->regmap, LP873X_REG_OTP_REV, &otpid);
+	if (ret) {
+		dev_err(lp873->dev, "Failed to read OTP ID\n");
+		return ret;
+	}
+
+	lp873->rev = otpid & LP873X_OTP_REV_OTP_ID;
+
+	i2c_set_clientdata(client, lp873);
+
+	ret = mfd_add_devices(lp873->dev, PLATFORM_DEVID_AUTO, lp873x_cells,
+			      ARRAY_SIZE(lp873x_cells), NULL, 0, NULL);
+
+	return ret;
+}
+
+static const struct of_device_id of_lp873x_match_table[] = {
+	{ .compatible = "ti,lp8733", },
+	{ .compatible = "ti,lp8732", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, of_lp873x_match_table);
+
+static const struct i2c_device_id lp873x_id_table[] = {
+	{ "lp873x", 0 },
+	{ },
+};
+MODULE_DEVICE_TABLE(i2c, lp873x_id_table);
+
+static struct i2c_driver lp873x_driver = {
+	.driver	= {
+		.name	= "lp873x",
+		.of_match_table = of_lp873x_match_table,
+	},
+	.probe		= lp873x_probe,
+	.id_table	= lp873x_id_table,
+};
+module_i2c_driver(lp873x_driver);
+
+MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
+MODULE_DESCRIPTION("LP873X chip family Multi-Function Device driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mfd/lp873x.h b/include/linux/mfd/lp873x.h
new file mode 100644
index 0000000..fc46f8a
--- /dev/null
+++ b/include/linux/mfd/lp873x.h
@@ -0,0 +1,269 @@
+/*
+ * Functions to access LP873X power management chip.
+ *
+ * Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * 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 version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __LINUX_MFD_LP873X_H
+#define __LINUX_MFD_LP873X_H
+
+#include <linux/i2c.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+
+/* LP873x chip id list */
+#define LP873X			0x00
+
+/* All register addresses */
+#define LP873X_REG_DEV_REV		0X00
+#define LP873X_REG_OTP_REV		0X01
+#define LP873X_REG_BUCK0_CTRL_1		0X02
+#define LP873X_REG_BUCK0_CTRL_2		0X03
+#define LP873X_REG_BUCK1_CTRL_1		0X04
+#define LP873X_REG_BUCK1_CTRL_2		0X05
+#define LP873X_REG_BUCK0_VOUT		0X06
+#define LP873X_REG_BUCK1_VOUT		0X07
+#define LP873X_REG_LDO0_CTRL		0X08
+#define LP873X_REG_LDO1_CTRL            0X09
+#define LP873X_REG_LDO0_VOUT		0X0A
+#define LP873X_REG_LDO1_VOUT		0X0B
+#define LP873X_REG_BUCK0_DELAY		0X0C
+#define LP873X_REG_BUCK1_DELAY		0X0D
+#define LP873X_REG_LDO0_DELAY		0X0E
+#define LP873X_REG_LDO1_DELAY		0X0F
+#define LP873X_REG_GPO_DELAY		0X10
+#define LP873X_REG_GPO2_DELAY		0X11
+#define LP873X_REG_GPO_CTRL		0X12
+#define LP873X_REG_CONFIG		0X13
+#define LP873X_REG_PLL_CTRL		0X14
+#define LP873X_REG_PGOOD_CTRL1		0X15
+#define LP873X_REG_PGOOD_CTRL2		0X16
+#define LP873X_REG_PG_FAULT		0X17
+#define LP873X_REG_RESET		0X18
+#define LP873X_REG_INT_TOP_1		0X19
+#define LP873X_REG_INT_TOP_2		0X1A
+#define LP873X_REG_INT_BUCK		0X1B
+#define LP873X_REG_INT_LDO		0X1C
+#define LP873X_REG_TOP_STAT		0X1D
+#define LP873X_REG_BUCK_STAT		0X1E
+#define LP873X_REG_LDO_STAT		0x1F
+#define LP873X_REG_TOP_MASK_1		0x20
+#define LP873X_REG_TOP_MASK_2		0x21
+#define LP873X_REG_BUCK_MASK		0x22
+#define LP873X_REG_LDO_MASK		0x23
+#define LP873X_REG_SEL_I_LOAD		0x24
+#define LP873X_REG_I_LOAD_2		0x25
+#define LP873X_REG_I_LOAD_1		0x26
+
+#define LP873X_REG_MAX			LP873X_REG_I_LOAD_1
+
+/* Register field definitions */
+#define LP873X_DEV_REV_DEV_ID			0xC0
+#define LP873X_DEV_REV_ALL_LAYER		0x30
+#define LP873X_DEV_REV_METAL_LAYER		0x0F
+
+#define LP873X_OTP_REV_OTP_ID			0xFF
+
+#define LP873X_BUCK0_CTRL_1_BUCK0_FPWM		BIT(3)
+#define LP873X_BUCK0_CTRL_1_BUCK0_RDIS_EN	BIT(2)
+#define LP873X_BUCK0_CTRL_1_BUCK0_EN_PIN_CTRL	BIT(1)
+#define LP873X_BUCK0_CTRL_1_BUCK0_EN		BIT(0)
+
+#define LP873X_BUCK0_CTRL_2_BUCK0_ILIM		0x38
+#define LP873X_BUCK0_CTRL_2_BUCK0_SLEW_RATE	0x07
+
+#define LP873X_BUCK1_CTRL_1_BUCK1_FPWM		BIT(3)
+#define LP873X_BUCK1_CTRL_1_BUCK1_RDIS_EN	BIT(2)
+#define LP873X_BUCK1_CTRL_1_BUCK1_EN_PIN_CTRL	BIT(1)
+#define LP873X_BUCK1_CTRL_1_BUCK1_EN		BIT(0)
+
+#define LP873X_BUCK1_CTRL_2_BUCK1_ILIM		0x38
+#define LP873X_BUCK1_CTRL_2_BUCK1_SLEW_RATE	0x07
+
+#define LP873X_BUCK0_VOUT_BUCK0_VSET		0xFF
+
+#define LP873X_BUCK1_VOUT_BUCK1_VSET		0xFF
+
+#define LP873X_LDO0_CTRL_LDO0_RDIS_EN		BIT(2)
+#define LP873X_LDO0_CTRL_LDO0_EN_PIN_CTRL	BIT(1)
+#define LP873X_LDO0_CTRL_LDO0_EN		BIT(0)
+
+#define LP873X_LDO1_CTRL_LDO1_RDIS_EN		BIT(2)
+#define LP873X_LDO1_CTRL_LDO1_EN_PIN_CTRL	BIT(1)
+#define LP873X_LDO1_CTRL_LDO1_EN		BIT(0)
+
+#define LP873X_LDO0_VOUT_LDO0_VSET		0x1F
+
+#define LP873X_LDO1_VOUT_LDO1_VSET		0x1F
+
+#define LP873X_BUCK0_DELAY_BUCK0_SD_DELAY	0xF0
+#define LP873X_BUCK0_DELAY_BUCK0_SU_DELAY	0x0F
+
+#define LP873X_BUCK1_DELAY_BUCK1_SD_DELAY	0xF0
+#define LP873X_BUCK1_DELAY_BUCK1_SU_DELAY	0x0F
+
+#define LP873X_LDO0_DELAY_LDO0_SD_DELAY	0xF0
+#define LP873X_LDO0_DELAY_LDO0_SU_DELAY	0x0F
+
+#define LP873X_LDO1_DELAY_LDO1_SD_DELAY	0xF0
+#define LP873X_LDO1_DELAY_LDO1_SU_DELAY	0x0F
+
+#define LP873X_GPO_DELAY_GPO_SD_DELAY		0xF0
+#define LP873X_GPO_DELAY_GPO_SU_DELAY		0x0F
+
+#define LP873X_GPO2_DELAY_GPO2_SD_DELAY	0xF0
+#define LP873X_GPO2_DELAY_GPO2_SU_DELAY	0x0F
+
+#define LP873X_GPO_CTRL_GPO2_OD		BIT(6)
+#define LP873X_GPO_CTRL_GPO2_EN_PIN_CTRL	BIT(5)
+#define LP873X_GPO_CTRL_GPO2_EN		BIT(4)
+#define LP873X_GPO_CTRL_GPO_OD			BIT(2)
+#define LP873X_GPO_CTRL_GPO_EN_PIN_CTRL	BIT(1)
+#define LP873X_GPO_CTRL_GPO_EN			BIT(0)
+
+#define LP873X_CONFIG_SU_DELAY_SEL		BIT(6)
+#define LP873X_CONFIG_SD_DELAY_SEL		BIT(5)
+#define LP873X_CONFIG_CLKIN_PIN_SEL		BIT(4)
+#define LP873X_CONFIG_CLKIN_PD			BIT(3)
+#define LP873X_CONFIG_EN_PD			BIT(2)
+#define LP873X_CONFIG_TDIE_WARN_LEVEL		BIT(1)
+#define LP873X_EN_SPREAD_SPEC			BIT(0)
+
+#define LP873X_PLL_CTRL_EN_PLL			BIT(6)
+#define LP873X_EXT_CLK_FREQ			0x1F
+
+#define LP873X_PGOOD_CTRL1_PGOOD_POL		BIT(7)
+#define LP873X_PGOOD_CTRL1_PGOOD_OD		BIT(6)
+#define LP873X_PGOOD_CTRL1_PGOOD_WINDOW_LDO	BIT(5)
+#define LP873X_PGOOD_CTRL1_PGOOD_WINDOWN_BUCK	BIT(4)
+#define LP873X_PGOOD_CTRL1_PGOOD_EN_PGOOD_LDO1	BIT(3)
+#define LP873X_PGOOD_CTRL1_PGOOD_EN_PGOOD_LDO0	BIT(2)
+#define LP873X_PGOOD_CTRL1_PGOOD_EN_PGOOD_BUCK1	BIT(1)
+#define LP873X_PGOOD_CTRL1_PGOOD_EN_PGOOD_BUCK0	BIT(0)
+
+#define LP873X_PGOOD_CTRL2_EN_PGOOD_TWARN	BIT(2)
+#define LP873X_PGOOD_CTRL2_EN_PG_FAULT_GATE	BIT(1)
+#define LP873X_PGOOD_CTRL2_PGOOD_MODE		BIT(0)
+
+#define LP873X_PG_FAULT_PG_FAULT_LDO1		BIT(3)
+#define LP873X_PG_FAULT_PG_FAULT_LDO0		BIT(2)
+#define LP873X_PG_FAULT_PG_FAULT_BUCK1		BIT(1)
+#define LP873X_PG_FAULT_PG_FAULT_BUCK0		BIT(0)
+
+#define LP873X_RESET_SW_RESET			BIT(0)
+
+#define LP873X_INT_TOP_1_PGOOD_INT		BIT(7)
+#define LP873X_INT_TOP_1_LDO_INT		BIT(6)
+#define LP873X_INT_TOP_1_BUCK_INT		BIT(5)
+#define LP873X_INT_TOP_1_SYNC_CLK_INT		BIT(4)
+#define LP873X_INT_TOP_1_TDIE_SD_INT		BIT(3)
+#define LP873X_INT_TOP_1_TDIE_WARN_INT		BIT(2)
+#define LP873X_INT_TOP_1_OVP_INT		BIT(1)
+#define LP873X_INT_TOP_1_I_MEAS_INT		BIT(0)
+
+#define LP873X_INT_TOP_2_RESET_REG_INT		BIT(0)
+
+#define LP873X_INT_BUCK_BUCK1_PG_INT		BIT(6)
+#define LP873X_INT_BUCK_BUCK1_SC_INT		BIT(5)
+#define LP873X_INT_BUCK_BUCK1_ILIM_INT		BIT(4)
+#define LP873X_INT_BUCK_BUCK0_PG_INT		BIT(2)
+#define LP873X_INT_BUCK_BUCK0_SC_INT		BIT(1)
+#define LP873X_INT_BUCK_BUCK0_ILIM_INT		BIT(0)
+
+#define LP873X_INT_LDO_LDO1_PG_INT		BIT(6)
+#define LP873X_INT_LDO_LDO1_SC_INT		BIT(5)
+#define LP873X_INT_LDO_LDO1_ILIM_INT		BIT(4)
+#define LP873X_INT_LDO_LDO0_PG_INT		BIT(2)
+#define LP873X_INT_LDO_LDO0_SC_INT		BIT(1)
+#define LP873X_INT_LDO_LDO0_ILIM_INT		BIT(0)
+
+#define LP873X_TOP_STAT_PGOOD_STAT		BIT(7)
+#define LP873X_TOP_STAT_SYNC_CLK_STAT		BIT(4)
+#define LP873X_TOP_STAT_TDIE_SD_STAT		BIT(3)
+#define LP873X_TOP_STAT_TDIE_WARN_STAT		BIT(2)
+#define LP873X_TOP_STAT_OVP_STAT		BIT(1)
+
+#define LP873X_BUCK_STAT_BUCK1_STAT		BIT(7)
+#define LP873X_BUCK_STAT_BUCK1_PG_STAT		BIT(6)
+#define LP873X_BUCK_STAT_BUCK1_ILIM_STAT	BIT(4)
+#define LP873X_BUCK_STAT_BUCK0_STAT		BIT(3)
+#define LP873X_BUCK_STAT_BUCK0_PG_STAT		BIT(2)
+#define LP873X_BUCK_STAT_BUCK0_ILIM_STAT	BIT(0)
+
+#define LP873X_LDO_STAT_LDO1_STAT		BIT(7)
+#define LP873X_LDO_STAT_LDO1_PG_STAT		BIT(6)
+#define LP873X_LDO_STAT_LDO1_ILIM_STAT		BIT(4)
+#define LP873X_LDO_STAT_LDO0_STAT		BIT(3)
+#define LP873X_LDO_STAT_LDO0_PG_STAT		BIT(2)
+#define LP873X_LDO_STAT_LDO0_ILIM_STAT		BIT(0)
+
+#define LP873X_TOP_MASK_1_PGOOD_INT_MASK	BIT(7)
+#define LP873X_TOP_MASK_1_SYNC_CLK_MASK	BIT(4)
+#define LP873X_TOP_MASK_1_TDIE_WARN_MASK	BIT(2)
+#define LP873X_TOP_MASK_1_I_MEAS_MASK		BIT(0)
+
+#define LP873X_TOP_MASK_2_RESET_REG_MASK	BIT(0)
+
+#define LP873X_BUCK_MASK_BUCK1_PGF_MASK	BIT(7)
+#define LP873X_BUCK_MASK_BUCK1_PGR_MASK	BIT(6)
+#define LP873X_BUCK_MASK_BUCK1_ILIM_MASK	BIT(4)
+#define LP873X_BUCK_MASK_BUCK0_PGF_MASK	BIT(3)
+#define LP873X_BUCK_MASK_BUCK0_PGR_MASK	BIT(2)
+#define LP873X_BUCK_MASK_BUCK0_ILIM_MASK	BIT(0)
+
+#define LP873X_LDO_MASK_LDO1_PGF_MASK		BIT(7)
+#define LP873X_LDO_MASK_LDO1_PGR_MASK		BIT(6)
+#define LP873X_LDO_MASK_LDO1_ILIM_MASK		BIT(4)
+#define LP873X_LDO_MASK_LDO0_PGF_MASK		BIT(3)
+#define LP873X_LDO_MASK_LDO0_PGR_MASK		BIT(2)
+#define LP873X_LDO_MASK_LDO0_ILIM_MASK		BIT(0)
+
+#define LP873X_SEL_I_LOAD_CURRENT_BUCK_SELECT	BIT(0)
+
+#define LP873X_I_LOAD_2_BUCK_LOAD_CURRENT	BIT(0)
+
+#define LP873X_I_LOAD_1_BUCK_LOAD_CURRENT	0xFF
+
+#define LP873X_MAX_REG_ID		LP873X_LDO_1
+
+/* Number of step-down converters available */
+#define LP873X_NUM_BUCK		2
+/* Number of LDO voltage regulators available */
+#define LP873X_NUM_LDO		2
+/* Number of total regulators available */
+#define LP873X_NUM_REGULATOR		(LP873X_NUM_BUCK + LP873X_NUM_LDO)
+
+enum lp873x_regulator_id {
+	/* BUCK's */
+	LP873X_BUCK_0,
+	LP873X_BUCK_1,
+	/* LDOs */
+	LP873X_LDO_0,
+	LP873X_LDO_1,
+};
+
+/**
+ * struct lp873x - state holder for the lp873x driver
+ * @dev: struct device pointer for MFD device
+ * @rev: revision of the lp873x
+ * @lock: lock guarding the data structure
+ * @regmap: register map of the lp873x PMIC
+ *
+ * Device data may be used to access the LP873X chip
+ */
+struct lp873x {
+	struct device *dev;
+	u8 rev;
+	struct mutex lock;	/* lock guarding the data structure */
+	struct regmap *regmap;
+};
+#endif /* __LINUX_MFD_LP873X_H */
-- 
1.9.1

[PATCH v9 2/3] gpio: lp873x: Add support for General Purpose Outputs

[Keerthy]

Add driver for lp873x PMIC family GPOs. Two GPOs are supported
and can be configured in Open-drain output or Push-pull output.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Keerthy <j-keerthy@ti.com>
---
 drivers/gpio/Kconfig       |  10 +++
 drivers/gpio/Makefile      |   1 +
 drivers/gpio/gpio-lp873x.c | 193 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 204 insertions(+)
 create mode 100644 drivers/gpio/gpio-lp873x.c

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 30c5373..c489f50 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -880,6 +880,16 @@ config GPIO_LP3943
 	  LP3943 can be used as a GPIO expander which provides up to 16 GPIOs.
 	  Open drain outputs are required for this usage.
 
+config GPIO_LP873X
+	tristate "TI LP873X GPO"
+	depends on MFD_TI_LP873X
+	help
+	  This driver supports the GPO on TI Lp873x PMICs. 2 GPOs are present
+	  on LP873X PMICs.
+
+	  This driver can also be built as a module. If so, the module will be
+          called gpio-lp873x.
+
 config GPIO_MAX77620
 	tristate "GPIO support for PMIC MAX77620 and MAX20024"
 	depends on MFD_MAX77620
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 691fb3a..b313fee 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -58,6 +58,7 @@ obj-$(CONFIG_GPIO_LOONGSON)	+= gpio-loongson.o
 obj-$(CONFIG_GPIO_LP3943)	+= gpio-lp3943.o
 obj-$(CONFIG_GPIO_LPC18XX)	+= gpio-lpc18xx.o
 obj-$(CONFIG_ARCH_LPC32XX)	+= gpio-lpc32xx.o
+obj-$(CONFIG_GPIO_LP873X)	+= gpio-lp873x.o
 obj-$(CONFIG_GPIO_LYNXPOINT)	+= gpio-lynxpoint.o
 obj-$(CONFIG_GPIO_MAX730X)	+= gpio-max730x.o
 obj-$(CONFIG_GPIO_MAX7300)	+= gpio-max7300.o
diff --git a/drivers/gpio/gpio-lp873x.c b/drivers/gpio/gpio-lp873x.c
new file mode 100644
index 0000000..f10d49d
--- /dev/null
+++ b/drivers/gpio/gpio-lp873x.c
@@ -0,0 +1,193 @@
+/*
+ * Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.com/
+ *	Keerthy <j-keerthy@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether expressed or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License version 2 for more details.
+ *
+ * Based on the TPS65218 driver
+ */
+
+#include <linux/gpio.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include <linux/mfd/lp873x.h>
+
+#define BITS_PER_GPO		0x4
+#define LP873X_GPO_CTRL_OD	0x2
+
+struct lp873x_gpio {
+	struct gpio_chip chip;
+	struct lp873x *lp873;
+};
+
+static int lp873x_gpio_get_direction(struct gpio_chip *chip,
+				     unsigned int offset)
+{
+	/* This device is output only */
+	return 0;
+}
+
+static int lp873x_gpio_direction_input(struct gpio_chip *chip,
+				       unsigned int offset)
+{
+	/* This device is output only */
+	return -EINVAL;
+}
+
+static int lp873x_gpio_direction_output(struct gpio_chip *chip,
+					unsigned int offset, int value)
+{
+	struct lp873x_gpio *gpio = gpiochip_get_data(chip);
+
+	/* Set the initial value */
+	return regmap_update_bits(gpio->lp873->regmap, LP873X_REG_GPO_CTRL,
+				  BIT(offset * BITS_PER_GPO),
+				  value ? BIT(offset * BITS_PER_GPO) : 0);
+}
+
+static int lp873x_gpio_get(struct gpio_chip *chip, unsigned int offset)
+{
+	struct lp873x_gpio *gpio = gpiochip_get_data(chip);
+	int ret, val;
+
+	ret = regmap_read(gpio->lp873->regmap, LP873X_REG_GPO_CTRL, &val);
+	if (ret < 0)
+		return ret;
+
+	return val & BIT(offset * BITS_PER_GPO);
+}
+
+static void lp873x_gpio_set(struct gpio_chip *chip, unsigned int offset,
+			    int value)
+{
+	struct lp873x_gpio *gpio = gpiochip_get_data(chip);
+
+	regmap_update_bits(gpio->lp873->regmap, LP873X_REG_GPO_CTRL,
+			   BIT(offset * BITS_PER_GPO),
+			   value ? BIT(offset * BITS_PER_GPO) : 0);
+}
+
+static int lp873x_gpio_request(struct gpio_chip *gc, unsigned int offset)
+{
+	struct lp873x_gpio *gpio = gpiochip_get_data(gc);
+	int ret;
+
+	switch (offset) {
+	case 0:
+		/* No MUX Set up Needed for GPO */
+		break;
+	case 1:
+		/* Setup the CLKIN_PIN_SEL MUX to GPO2 */
+		ret = regmap_update_bits(gpio->lp873->regmap, LP873X_REG_CONFIG,
+					 LP873X_CONFIG_CLKIN_PIN_SEL, 0);
+		if (ret)
+			return ret;
+
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int lp873x_gpio_set_single_ended(struct gpio_chip *gc,
+					unsigned int offset,
+					enum single_ended_mode mode)
+{
+	struct lp873x_gpio *gpio = gpiochip_get_data(gc);
+
+	switch (mode) {
+	case LINE_MODE_OPEN_DRAIN:
+		return regmap_update_bits(gpio->lp873->regmap,
+					  LP873X_REG_GPO_CTRL,
+					  BIT(offset * BITS_PER_GPO +
+					  LP873X_GPO_CTRL_OD),
+					  BIT(offset * BITS_PER_GPO +
+					  LP873X_GPO_CTRL_OD));
+	case LINE_MODE_PUSH_PULL:
+		return regmap_update_bits(gpio->lp873->regmap,
+					  LP873X_REG_GPO_CTRL,
+					  BIT(offset * BITS_PER_GPO +
+					  LP873X_GPO_CTRL_OD), 0);
+	default:
+		return -ENOTSUPP;
+	}
+}
+
+static struct gpio_chip template_chip = {
+	.label			= "lp873x-gpio",
+	.owner			= THIS_MODULE,
+	.request		= lp873x_gpio_request,
+	.get_direction		= lp873x_gpio_get_direction,
+	.direction_input	= lp873x_gpio_direction_input,
+	.direction_output	= lp873x_gpio_direction_output,
+	.get			= lp873x_gpio_get,
+	.set			= lp873x_gpio_set,
+	.set_single_ended	= lp873x_gpio_set_single_ended,
+	.base			= -1,
+	.ngpio			= 2,
+	.can_sleep		= true,
+};
+
+static int lp873x_gpio_probe(struct platform_device *pdev)
+{
+	struct lp873x_gpio *gpio;
+	int ret;
+
+	gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
+	if (!gpio)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, gpio);
+
+	gpio->lp873 = dev_get_drvdata(pdev->dev.parent);
+	gpio->chip = template_chip;
+	gpio->chip.parent = gpio->lp873->dev;
+
+	ret = gpiochip_add_data(&gpio->chip, gpio);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int lp873x_gpio_remove(struct platform_device *pdev)
+{
+	struct lp873x_gpio *gpio = platform_get_drvdata(pdev);
+
+	gpiochip_remove(&gpio->chip);
+
+	return 0;
+}
+
+static const struct platform_device_id lp873x_gpio_id_table[] = {
+	{ "lp873x-gpio", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, lp873x_gpio_id_table);
+
+static struct platform_driver lp873x_gpio_driver = {
+	.driver = {
+		.name = "lp873x-gpio",
+	},
+	.probe = lp873x_gpio_probe,
+	.remove = lp873x_gpio_remove,
+	.id_table = lp873x_gpio_id_table,
+};
+module_platform_driver(lp873x_gpio_driver);
+
+MODULE_AUTHOR("Keerthy <j-keerthy@ti.com>");
+MODULE_DESCRIPTION("LP873X GPIO driver");
+MODULE_LICENSE("GPL v2");
-- 
1.9.1

[PATCH v9 2/3] gpio: lp873x: Add support for General Purpose Outputs

[Keerthy]

Add driver for lp873x PMIC family GPOs. Two GPOs are supported
and can be configured in Open-drain output or Push-pull output.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Keerthy <j-keerthy@ti.com>
---
 drivers/gpio/Kconfig       |  10 +++
 drivers/gpio/Makefile      |   1 +
 drivers/gpio/gpio-lp873x.c | 193 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 204 insertions(+)
 create mode 100644 drivers/gpio/gpio-lp873x.c

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 30c5373..c489f50 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -880,6 +880,16 @@ config GPIO_LP3943
 	  LP3943 can be used as a GPIO expander which provides up to 16 GPIOs.
 	  Open drain outputs are required for this usage.
 
+config GPIO_LP873X
+	tristate "TI LP873X GPO"
+	depends on MFD_TI_LP873X
+	help
+	  This driver supports the GPO on TI Lp873x PMICs. 2 GPOs are present
+	  on LP873X PMICs.
+
+	  This driver can also be built as a module. If so, the module will be
+          called gpio-lp873x.
+
 config GPIO_MAX77620
 	tristate "GPIO support for PMIC MAX77620 and MAX20024"
 	depends on MFD_MAX77620
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 691fb3a..b313fee 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -58,6 +58,7 @@ obj-$(CONFIG_GPIO_LOONGSON)	+= gpio-loongson.o
 obj-$(CONFIG_GPIO_LP3943)	+= gpio-lp3943.o
 obj-$(CONFIG_GPIO_LPC18XX)	+= gpio-lpc18xx.o
 obj-$(CONFIG_ARCH_LPC32XX)	+= gpio-lpc32xx.o
+obj-$(CONFIG_GPIO_LP873X)	+= gpio-lp873x.o
 obj-$(CONFIG_GPIO_LYNXPOINT)	+= gpio-lynxpoint.o
 obj-$(CONFIG_GPIO_MAX730X)	+= gpio-max730x.o
 obj-$(CONFIG_GPIO_MAX7300)	+= gpio-max7300.o
diff --git a/drivers/gpio/gpio-lp873x.c b/drivers/gpio/gpio-lp873x.c
new file mode 100644
index 0000000..f10d49d
--- /dev/null
+++ b/drivers/gpio/gpio-lp873x.c
@@ -0,0 +1,193 @@
+/*
+ * Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.com/
+ *	Keerthy <j-keerthy@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether expressed or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License version 2 for more details.
+ *
+ * Based on the TPS65218 driver
+ */
+
+#include <linux/gpio.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include <linux/mfd/lp873x.h>
+
+#define BITS_PER_GPO		0x4
+#define LP873X_GPO_CTRL_OD	0x2
+
+struct lp873x_gpio {
+	struct gpio_chip chip;
+	struct lp873x *lp873;
+};
+
+static int lp873x_gpio_get_direction(struct gpio_chip *chip,
+				     unsigned int offset)
+{
+	/* This device is output only */
+	return 0;
+}
+
+static int lp873x_gpio_direction_input(struct gpio_chip *chip,
+				       unsigned int offset)
+{
+	/* This device is output only */
+	return -EINVAL;
+}
+
+static int lp873x_gpio_direction_output(struct gpio_chip *chip,
+					unsigned int offset, int value)
+{
+	struct lp873x_gpio *gpio = gpiochip_get_data(chip);
+
+	/* Set the initial value */
+	return regmap_update_bits(gpio->lp873->regmap, LP873X_REG_GPO_CTRL,
+				  BIT(offset * BITS_PER_GPO),
+				  value ? BIT(offset * BITS_PER_GPO) : 0);
+}
+
+static int lp873x_gpio_get(struct gpio_chip *chip, unsigned int offset)
+{
+	struct lp873x_gpio *gpio = gpiochip_get_data(chip);
+	int ret, val;
+
+	ret = regmap_read(gpio->lp873->regmap, LP873X_REG_GPO_CTRL, &val);
+	if (ret < 0)
+		return ret;
+
+	return val & BIT(offset * BITS_PER_GPO);
+}
+
+static void lp873x_gpio_set(struct gpio_chip *chip, unsigned int offset,
+			    int value)
+{
+	struct lp873x_gpio *gpio = gpiochip_get_data(chip);
+
+	regmap_update_bits(gpio->lp873->regmap, LP873X_REG_GPO_CTRL,
+			   BIT(offset * BITS_PER_GPO),
+			   value ? BIT(offset * BITS_PER_GPO) : 0);
+}
+
+static int lp873x_gpio_request(struct gpio_chip *gc, unsigned int offset)
+{
+	struct lp873x_gpio *gpio = gpiochip_get_data(gc);
+	int ret;
+
+	switch (offset) {
+	case 0:
+		/* No MUX Set up Needed for GPO */
+		break;
+	case 1:
+		/* Setup the CLKIN_PIN_SEL MUX to GPO2 */
+		ret = regmap_update_bits(gpio->lp873->regmap, LP873X_REG_CONFIG,
+					 LP873X_CONFIG_CLKIN_PIN_SEL, 0);
+		if (ret)
+			return ret;
+
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int lp873x_gpio_set_single_ended(struct gpio_chip *gc,
+					unsigned int offset,
+					enum single_ended_mode mode)
+{
+	struct lp873x_gpio *gpio = gpiochip_get_data(gc);
+
+	switch (mode) {
+	case LINE_MODE_OPEN_DRAIN:
+		return regmap_update_bits(gpio->lp873->regmap,
+					  LP873X_REG_GPO_CTRL,
+					  BIT(offset * BITS_PER_GPO +
+					  LP873X_GPO_CTRL_OD),
+					  BIT(offset * BITS_PER_GPO +
+					  LP873X_GPO_CTRL_OD));
+	case LINE_MODE_PUSH_PULL:
+		return regmap_update_bits(gpio->lp873->regmap,
+					  LP873X_REG_GPO_CTRL,
+					  BIT(offset * BITS_PER_GPO +
+					  LP873X_GPO_CTRL_OD), 0);
+	default:
+		return -ENOTSUPP;
+	}
+}
+
+static struct gpio_chip template_chip = {
+	.label			= "lp873x-gpio",
+	.owner			= THIS_MODULE,
+	.request		= lp873x_gpio_request,
+	.get_direction		= lp873x_gpio_get_direction,
+	.direction_input	= lp873x_gpio_direction_input,
+	.direction_output	= lp873x_gpio_direction_output,
+	.get			= lp873x_gpio_get,
+	.set			= lp873x_gpio_set,
+	.set_single_ended	= lp873x_gpio_set_single_ended,
+	.base			= -1,
+	.ngpio			= 2,
+	.can_sleep		= true,
+};
+
+static int lp873x_gpio_probe(struct platform_device *pdev)
+{
+	struct lp873x_gpio *gpio;
+	int ret;
+
+	gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
+	if (!gpio)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, gpio);
+
+	gpio->lp873 = dev_get_drvdata(pdev->dev.parent);
+	gpio->chip = template_chip;
+	gpio->chip.parent = gpio->lp873->dev;
+
+	ret = gpiochip_add_data(&gpio->chip, gpio);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int lp873x_gpio_remove(struct platform_device *pdev)
+{
+	struct lp873x_gpio *gpio = platform_get_drvdata(pdev);
+
+	gpiochip_remove(&gpio->chip);
+
+	return 0;
+}
+
+static const struct platform_device_id lp873x_gpio_id_table[] = {
+	{ "lp873x-gpio", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, lp873x_gpio_id_table);
+
+static struct platform_driver lp873x_gpio_driver = {
+	.driver = {
+		.name = "lp873x-gpio",
+	},
+	.probe = lp873x_gpio_probe,
+	.remove = lp873x_gpio_remove,
+	.id_table = lp873x_gpio_id_table,
+};
+module_platform_driver(lp873x_gpio_driver);
+
+MODULE_AUTHOR("Keerthy <j-keerthy@ti.com>");
+MODULE_DESCRIPTION("LP873X GPIO driver");
+MODULE_LICENSE("GPL v2");
-- 
1.9.1

[PATCH v9 3/3] regulator: lp873x: Change the MFD config option as per latest naming

[Keerthy]

Change the MFD config option as per latest naming

Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Keerthy <j-keerthy@ti.com>
---
 drivers/regulator/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 4c2631a..06c7518 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -323,7 +323,7 @@ config REGULATOR_LP872X
 
 config REGULATOR_LP873X
 	tristate "TI LP873X Power regulators"
-	depends on MFD_LP873X && OF
+	depends on MFD_TI_LP873X && OF
 	help
 	  This driver supports LP873X voltage regulator chips. LP873X
 	  provides two step-down converters and two general-purpose LDO
-- 
1.9.1

[PATCH v9 3/3] regulator: lp873x: Change the MFD config option as per latest naming

[Keerthy]

Change the MFD config option as per latest naming

Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Keerthy <j-keerthy@ti.com>
---
 drivers/regulator/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 4c2631a..06c7518 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -323,7 +323,7 @@ config REGULATOR_LP872X
 
 config REGULATOR_LP873X
 	tristate "TI LP873X Power regulators"
-	depends on MFD_LP873X && OF
+	depends on MFD_TI_LP873X && OF
 	help
 	  This driver supports LP873X voltage regulator chips. LP873X
 	  provides two step-down converters and two general-purpose LDO
-- 
1.9.1

Re: [PATCH v9 1/3] mfd: lp873x: Add lp873x PMIC support

[Lee Jones]

On Wed, 31 Aug 2016, Keerthy wrote:

> The LP873X chip is a power management IC for Portable Navigation Systems
>     and Tablet Computing devices. It contains the following components:
> 
>      - Regulators.
>      - Configurable General Purpose Output Signals (GPO).
> 
> PMIC interacts with the main processor through i2c. PMIC has
> couple of LDOs (Linear Regulators), couple of BUCKs (Step-Down DC-DC
> Converter Cores) and GPOs (General Purpose Output Signals).
> 
> Signed-off-by: Keerthy <j-keerthy-l0cyMroinI0@public.gmane.org>
> ---
>  drivers/mfd/Kconfig        |  14 +++
>  drivers/mfd/Makefile       |   2 +
>  drivers/mfd/lp873x.c       |  99 +++++++++++++++++
>  include/linux/mfd/lp873x.h | 269 +++++++++++++++++++++++++++++++++++++++++++++
>  4 files changed, 384 insertions(+)
>  create mode 100644 drivers/mfd/lp873x.c
>  create mode 100644 include/linux/mfd/lp873x.h

For my own reference:
  Acked-by: Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>

> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 2d1fb64..69e51d0 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -1224,6 +1224,20 @@ config MFD_TPS65217
>  	  This driver can also be built as a module.  If so, the module
>  	  will be called tps65217.
>  
> +config MFD_TI_LP873X
> +	tristate "TI LP873X Power Management IC"
> +	depends on I2C
> +	select MFD_CORE
> +	select REGMAP_I2C
> +	help
> +	  If you say yes here then you get support for the LP873X series of
> +	  Power Management Integrated Circuits (PMIC).
> +	  These include voltage regulators, thermal protection, configurable
> +	  General Purpose Outputs (GPO) that are used in portable devices.
> +
> +	  This driver can also be built as a module. If so, the module
> +	  will be called lp873x.
> +
>  config MFD_TPS65218
>  	tristate "TI TPS65218 Power Management chips"
>  	depends on I2C
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index 2ba3ba3..42acbcd 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -22,6 +22,8 @@ obj-$(CONFIG_HTC_EGPIO)		+= htc-egpio.o
>  obj-$(CONFIG_HTC_PASIC3)	+= htc-pasic3.o
>  obj-$(CONFIG_HTC_I2CPLD)	+= htc-i2cpld.o
>  
> +obj-$(CONFIG_MFD_TI_LP873X)	+= lp873x.o
> +
>  obj-$(CONFIG_MFD_DAVINCI_VOICECODEC)	+= davinci_voicecodec.o
>  obj-$(CONFIG_MFD_DM355EVM_MSP)	+= dm355evm_msp.o
>  obj-$(CONFIG_MFD_TI_AM335X_TSCADC)	+= ti_am335x_tscadc.o
> diff --git a/drivers/mfd/lp873x.c b/drivers/mfd/lp873x.c
> new file mode 100644
> index 0000000..4ab2401
> --- /dev/null
> +++ b/drivers/mfd/lp873x.c
> @@ -0,0 +1,99 @@
> +/*
> + * Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.com/
> + *
> + * Author: Keerthy <j-keerthy-l0cyMroinI0@public.gmane.org>
> + *
> + * 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 version 2.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether express or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <linux/interrupt.h>
> +#include <linux/mfd/core.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include <linux/regmap.h>
> +
> +#include <linux/mfd/lp873x.h>
> +
> +static const struct regmap_config lp873x_regmap_config = {
> +	.reg_bits = 8,
> +	.val_bits = 8,
> +	.max_register = LP873X_REG_MAX,
> +};
> +
> +static const struct mfd_cell lp873x_cells[] = {
> +	{ .name = "lp873x-regulator", },
> +	{ .name = "lp873x-gpio", },
> +};
> +
> +static int lp873x_probe(struct i2c_client *client,
> +			const struct i2c_device_id *ids)
> +{
> +	struct lp873x *lp873;
> +	int ret;
> +	unsigned int otpid;
> +
> +	lp873 = devm_kzalloc(&client->dev, sizeof(*lp873), GFP_KERNEL);
> +	if (!lp873)
> +		return -ENOMEM;
> +
> +	lp873->dev = &client->dev;
> +
> +	lp873->regmap = devm_regmap_init_i2c(client, &lp873x_regmap_config);
> +	if (IS_ERR(lp873->regmap)) {
> +		ret = PTR_ERR(lp873->regmap);
> +		dev_err(lp873->dev,
> +			"Failed to initialize register map: %d\n", ret);
> +		return ret;
> +	}
> +
> +	mutex_init(&lp873->lock);
> +
> +	ret = regmap_read(lp873->regmap, LP873X_REG_OTP_REV, &otpid);
> +	if (ret) {
> +		dev_err(lp873->dev, "Failed to read OTP ID\n");
> +		return ret;
> +	}
> +
> +	lp873->rev = otpid & LP873X_OTP_REV_OTP_ID;
> +
> +	i2c_set_clientdata(client, lp873);
> +
> +	ret = mfd_add_devices(lp873->dev, PLATFORM_DEVID_AUTO, lp873x_cells,
> +			      ARRAY_SIZE(lp873x_cells), NULL, 0, NULL);
> +
> +	return ret;
> +}
> +
> +static const struct of_device_id of_lp873x_match_table[] = {
> +	{ .compatible = "ti,lp8733", },
> +	{ .compatible = "ti,lp8732", },
> +	{}
> +};
> +MODULE_DEVICE_TABLE(of, of_lp873x_match_table);
> +
> +static const struct i2c_device_id lp873x_id_table[] = {
> +	{ "lp873x", 0 },
> +	{ },
> +};
> +MODULE_DEVICE_TABLE(i2c, lp873x_id_table);
> +
> +static struct i2c_driver lp873x_driver = {
> +	.driver	= {
> +		.name	= "lp873x",
> +		.of_match_table = of_lp873x_match_table,
> +	},
> +	.probe		= lp873x_probe,
> +	.id_table	= lp873x_id_table,
> +};
> +module_i2c_driver(lp873x_driver);
> +
> +MODULE_AUTHOR("J Keerthy <j-keerthy-l0cyMroinI0@public.gmane.org>");
> +MODULE_DESCRIPTION("LP873X chip family Multi-Function Device driver");
> +MODULE_LICENSE("GPL v2");
> diff --git a/include/linux/mfd/lp873x.h b/include/linux/mfd/lp873x.h
> new file mode 100644
> index 0000000..fc46f8a
> --- /dev/null
> +++ b/include/linux/mfd/lp873x.h
> @@ -0,0 +1,269 @@
> +/*
> + * Functions to access LP873X power management chip.
> + *
> + * Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.com/
> + *
> + * 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 version 2.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether express or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +#ifndef __LINUX_MFD_LP873X_H
> +#define __LINUX_MFD_LP873X_H
> +
> +#include <linux/i2c.h>
> +#include <linux/regulator/driver.h>
> +#include <linux/regulator/machine.h>
> +
> +/* LP873x chip id list */
> +#define LP873X			0x00
> +
> +/* All register addresses */
> +#define LP873X_REG_DEV_REV		0X00
> +#define LP873X_REG_OTP_REV		0X01
> +#define LP873X_REG_BUCK0_CTRL_1		0X02
> +#define LP873X_REG_BUCK0_CTRL_2		0X03
> +#define LP873X_REG_BUCK1_CTRL_1		0X04
> +#define LP873X_REG_BUCK1_CTRL_2		0X05
> +#define LP873X_REG_BUCK0_VOUT		0X06
> +#define LP873X_REG_BUCK1_VOUT		0X07
> +#define LP873X_REG_LDO0_CTRL		0X08
> +#define LP873X_REG_LDO1_CTRL            0X09
> +#define LP873X_REG_LDO0_VOUT		0X0A
> +#define LP873X_REG_LDO1_VOUT		0X0B
> +#define LP873X_REG_BUCK0_DELAY		0X0C
> +#define LP873X_REG_BUCK1_DELAY		0X0D
> +#define LP873X_REG_LDO0_DELAY		0X0E
> +#define LP873X_REG_LDO1_DELAY		0X0F
> +#define LP873X_REG_GPO_DELAY		0X10
> +#define LP873X_REG_GPO2_DELAY		0X11
> +#define LP873X_REG_GPO_CTRL		0X12
> +#define LP873X_REG_CONFIG		0X13
> +#define LP873X_REG_PLL_CTRL		0X14
> +#define LP873X_REG_PGOOD_CTRL1		0X15
> +#define LP873X_REG_PGOOD_CTRL2		0X16
> +#define LP873X_REG_PG_FAULT		0X17
> +#define LP873X_REG_RESET		0X18
> +#define LP873X_REG_INT_TOP_1		0X19
> +#define LP873X_REG_INT_TOP_2		0X1A
> +#define LP873X_REG_INT_BUCK		0X1B
> +#define LP873X_REG_INT_LDO		0X1C
> +#define LP873X_REG_TOP_STAT		0X1D
> +#define LP873X_REG_BUCK_STAT		0X1E
> +#define LP873X_REG_LDO_STAT		0x1F
> +#define LP873X_REG_TOP_MASK_1		0x20
> +#define LP873X_REG_TOP_MASK_2		0x21
> +#define LP873X_REG_BUCK_MASK		0x22
> +#define LP873X_REG_LDO_MASK		0x23
> +#define LP873X_REG_SEL_I_LOAD		0x24
> +#define LP873X_REG_I_LOAD_2		0x25
> +#define LP873X_REG_I_LOAD_1		0x26
> +
> +#define LP873X_REG_MAX			LP873X_REG_I_LOAD_1
> +
> +/* Register field definitions */
> +#define LP873X_DEV_REV_DEV_ID			0xC0
> +#define LP873X_DEV_REV_ALL_LAYER		0x30
> +#define LP873X_DEV_REV_METAL_LAYER		0x0F
> +
> +#define LP873X_OTP_REV_OTP_ID			0xFF
> +
> +#define LP873X_BUCK0_CTRL_1_BUCK0_FPWM		BIT(3)
> +#define LP873X_BUCK0_CTRL_1_BUCK0_RDIS_EN	BIT(2)
> +#define LP873X_BUCK0_CTRL_1_BUCK0_EN_PIN_CTRL	BIT(1)
> +#define LP873X_BUCK0_CTRL_1_BUCK0_EN		BIT(0)
> +
> +#define LP873X_BUCK0_CTRL_2_BUCK0_ILIM		0x38
> +#define LP873X_BUCK0_CTRL_2_BUCK0_SLEW_RATE	0x07
> +
> +#define LP873X_BUCK1_CTRL_1_BUCK1_FPWM		BIT(3)
> +#define LP873X_BUCK1_CTRL_1_BUCK1_RDIS_EN	BIT(2)
> +#define LP873X_BUCK1_CTRL_1_BUCK1_EN_PIN_CTRL	BIT(1)
> +#define LP873X_BUCK1_CTRL_1_BUCK1_EN		BIT(0)
> +
> +#define LP873X_BUCK1_CTRL_2_BUCK1_ILIM		0x38
> +#define LP873X_BUCK1_CTRL_2_BUCK1_SLEW_RATE	0x07
> +
> +#define LP873X_BUCK0_VOUT_BUCK0_VSET		0xFF
> +
> +#define LP873X_BUCK1_VOUT_BUCK1_VSET		0xFF
> +
> +#define LP873X_LDO0_CTRL_LDO0_RDIS_EN		BIT(2)
> +#define LP873X_LDO0_CTRL_LDO0_EN_PIN_CTRL	BIT(1)
> +#define LP873X_LDO0_CTRL_LDO0_EN		BIT(0)
> +
> +#define LP873X_LDO1_CTRL_LDO1_RDIS_EN		BIT(2)
> +#define LP873X_LDO1_CTRL_LDO1_EN_PIN_CTRL	BIT(1)
> +#define LP873X_LDO1_CTRL_LDO1_EN		BIT(0)
> +
> +#define LP873X_LDO0_VOUT_LDO0_VSET		0x1F
> +
> +#define LP873X_LDO1_VOUT_LDO1_VSET		0x1F
> +
> +#define LP873X_BUCK0_DELAY_BUCK0_SD_DELAY	0xF0
> +#define LP873X_BUCK0_DELAY_BUCK0_SU_DELAY	0x0F
> +
> +#define LP873X_BUCK1_DELAY_BUCK1_SD_DELAY	0xF0
> +#define LP873X_BUCK1_DELAY_BUCK1_SU_DELAY	0x0F
> +
> +#define LP873X_LDO0_DELAY_LDO0_SD_DELAY	0xF0
> +#define LP873X_LDO0_DELAY_LDO0_SU_DELAY	0x0F
> +
> +#define LP873X_LDO1_DELAY_LDO1_SD_DELAY	0xF0
> +#define LP873X_LDO1_DELAY_LDO1_SU_DELAY	0x0F
> +
> +#define LP873X_GPO_DELAY_GPO_SD_DELAY		0xF0
> +#define LP873X_GPO_DELAY_GPO_SU_DELAY		0x0F
> +
> +#define LP873X_GPO2_DELAY_GPO2_SD_DELAY	0xF0
> +#define LP873X_GPO2_DELAY_GPO2_SU_DELAY	0x0F
> +
> +#define LP873X_GPO_CTRL_GPO2_OD		BIT(6)
> +#define LP873X_GPO_CTRL_GPO2_EN_PIN_CTRL	BIT(5)
> +#define LP873X_GPO_CTRL_GPO2_EN		BIT(4)
> +#define LP873X_GPO_CTRL_GPO_OD			BIT(2)
> +#define LP873X_GPO_CTRL_GPO_EN_PIN_CTRL	BIT(1)
> +#define LP873X_GPO_CTRL_GPO_EN			BIT(0)
> +
> +#define LP873X_CONFIG_SU_DELAY_SEL		BIT(6)
> +#define LP873X_CONFIG_SD_DELAY_SEL		BIT(5)
> +#define LP873X_CONFIG_CLKIN_PIN_SEL		BIT(4)
> +#define LP873X_CONFIG_CLKIN_PD			BIT(3)
> +#define LP873X_CONFIG_EN_PD			BIT(2)
> +#define LP873X_CONFIG_TDIE_WARN_LEVEL		BIT(1)
> +#define LP873X_EN_SPREAD_SPEC			BIT(0)
> +
> +#define LP873X_PLL_CTRL_EN_PLL			BIT(6)
> +#define LP873X_EXT_CLK_FREQ			0x1F
> +
> +#define LP873X_PGOOD_CTRL1_PGOOD_POL		BIT(7)
> +#define LP873X_PGOOD_CTRL1_PGOOD_OD		BIT(6)
> +#define LP873X_PGOOD_CTRL1_PGOOD_WINDOW_LDO	BIT(5)
> +#define LP873X_PGOOD_CTRL1_PGOOD_WINDOWN_BUCK	BIT(4)
> +#define LP873X_PGOOD_CTRL1_PGOOD_EN_PGOOD_LDO1	BIT(3)
> +#define LP873X_PGOOD_CTRL1_PGOOD_EN_PGOOD_LDO0	BIT(2)
> +#define LP873X_PGOOD_CTRL1_PGOOD_EN_PGOOD_BUCK1	BIT(1)
> +#define LP873X_PGOOD_CTRL1_PGOOD_EN_PGOOD_BUCK0	BIT(0)
> +
> +#define LP873X_PGOOD_CTRL2_EN_PGOOD_TWARN	BIT(2)
> +#define LP873X_PGOOD_CTRL2_EN_PG_FAULT_GATE	BIT(1)
> +#define LP873X_PGOOD_CTRL2_PGOOD_MODE		BIT(0)
> +
> +#define LP873X_PG_FAULT_PG_FAULT_LDO1		BIT(3)
> +#define LP873X_PG_FAULT_PG_FAULT_LDO0		BIT(2)
> +#define LP873X_PG_FAULT_PG_FAULT_BUCK1		BIT(1)
> +#define LP873X_PG_FAULT_PG_FAULT_BUCK0		BIT(0)
> +
> +#define LP873X_RESET_SW_RESET			BIT(0)
> +
> +#define LP873X_INT_TOP_1_PGOOD_INT		BIT(7)
> +#define LP873X_INT_TOP_1_LDO_INT		BIT(6)
> +#define LP873X_INT_TOP_1_BUCK_INT		BIT(5)
> +#define LP873X_INT_TOP_1_SYNC_CLK_INT		BIT(4)
> +#define LP873X_INT_TOP_1_TDIE_SD_INT		BIT(3)
> +#define LP873X_INT_TOP_1_TDIE_WARN_INT		BIT(2)
> +#define LP873X_INT_TOP_1_OVP_INT		BIT(1)
> +#define LP873X_INT_TOP_1_I_MEAS_INT		BIT(0)
> +
> +#define LP873X_INT_TOP_2_RESET_REG_INT		BIT(0)
> +
> +#define LP873X_INT_BUCK_BUCK1_PG_INT		BIT(6)
> +#define LP873X_INT_BUCK_BUCK1_SC_INT		BIT(5)
> +#define LP873X_INT_BUCK_BUCK1_ILIM_INT		BIT(4)
> +#define LP873X_INT_BUCK_BUCK0_PG_INT		BIT(2)
> +#define LP873X_INT_BUCK_BUCK0_SC_INT		BIT(1)
> +#define LP873X_INT_BUCK_BUCK0_ILIM_INT		BIT(0)
> +
> +#define LP873X_INT_LDO_LDO1_PG_INT		BIT(6)
> +#define LP873X_INT_LDO_LDO1_SC_INT		BIT(5)
> +#define LP873X_INT_LDO_LDO1_ILIM_INT		BIT(4)
> +#define LP873X_INT_LDO_LDO0_PG_INT		BIT(2)
> +#define LP873X_INT_LDO_LDO0_SC_INT		BIT(1)
> +#define LP873X_INT_LDO_LDO0_ILIM_INT		BIT(0)
> +
> +#define LP873X_TOP_STAT_PGOOD_STAT		BIT(7)
> +#define LP873X_TOP_STAT_SYNC_CLK_STAT		BIT(4)
> +#define LP873X_TOP_STAT_TDIE_SD_STAT		BIT(3)
> +#define LP873X_TOP_STAT_TDIE_WARN_STAT		BIT(2)
> +#define LP873X_TOP_STAT_OVP_STAT		BIT(1)
> +
> +#define LP873X_BUCK_STAT_BUCK1_STAT		BIT(7)
> +#define LP873X_BUCK_STAT_BUCK1_PG_STAT		BIT(6)
> +#define LP873X_BUCK_STAT_BUCK1_ILIM_STAT	BIT(4)
> +#define LP873X_BUCK_STAT_BUCK0_STAT		BIT(3)
> +#define LP873X_BUCK_STAT_BUCK0_PG_STAT		BIT(2)
> +#define LP873X_BUCK_STAT_BUCK0_ILIM_STAT	BIT(0)
> +
> +#define LP873X_LDO_STAT_LDO1_STAT		BIT(7)
> +#define LP873X_LDO_STAT_LDO1_PG_STAT		BIT(6)
> +#define LP873X_LDO_STAT_LDO1_ILIM_STAT		BIT(4)
> +#define LP873X_LDO_STAT_LDO0_STAT		BIT(3)
> +#define LP873X_LDO_STAT_LDO0_PG_STAT		BIT(2)
> +#define LP873X_LDO_STAT_LDO0_ILIM_STAT		BIT(0)
> +
> +#define LP873X_TOP_MASK_1_PGOOD_INT_MASK	BIT(7)
> +#define LP873X_TOP_MASK_1_SYNC_CLK_MASK	BIT(4)
> +#define LP873X_TOP_MASK_1_TDIE_WARN_MASK	BIT(2)
> +#define LP873X_TOP_MASK_1_I_MEAS_MASK		BIT(0)
> +
> +#define LP873X_TOP_MASK_2_RESET_REG_MASK	BIT(0)
> +
> +#define LP873X_BUCK_MASK_BUCK1_PGF_MASK	BIT(7)
> +#define LP873X_BUCK_MASK_BUCK1_PGR_MASK	BIT(6)
> +#define LP873X_BUCK_MASK_BUCK1_ILIM_MASK	BIT(4)
> +#define LP873X_BUCK_MASK_BUCK0_PGF_MASK	BIT(3)
> +#define LP873X_BUCK_MASK_BUCK0_PGR_MASK	BIT(2)
> +#define LP873X_BUCK_MASK_BUCK0_ILIM_MASK	BIT(0)
> +
> +#define LP873X_LDO_MASK_LDO1_PGF_MASK		BIT(7)
> +#define LP873X_LDO_MASK_LDO1_PGR_MASK		BIT(6)
> +#define LP873X_LDO_MASK_LDO1_ILIM_MASK		BIT(4)
> +#define LP873X_LDO_MASK_LDO0_PGF_MASK		BIT(3)
> +#define LP873X_LDO_MASK_LDO0_PGR_MASK		BIT(2)
> +#define LP873X_LDO_MASK_LDO0_ILIM_MASK		BIT(0)
> +
> +#define LP873X_SEL_I_LOAD_CURRENT_BUCK_SELECT	BIT(0)
> +
> +#define LP873X_I_LOAD_2_BUCK_LOAD_CURRENT	BIT(0)
> +
> +#define LP873X_I_LOAD_1_BUCK_LOAD_CURRENT	0xFF
> +
> +#define LP873X_MAX_REG_ID		LP873X_LDO_1
> +
> +/* Number of step-down converters available */
> +#define LP873X_NUM_BUCK		2
> +/* Number of LDO voltage regulators available */
> +#define LP873X_NUM_LDO		2
> +/* Number of total regulators available */
> +#define LP873X_NUM_REGULATOR		(LP873X_NUM_BUCK + LP873X_NUM_LDO)
> +
> +enum lp873x_regulator_id {
> +	/* BUCK's */
> +	LP873X_BUCK_0,
> +	LP873X_BUCK_1,
> +	/* LDOs */
> +	LP873X_LDO_0,
> +	LP873X_LDO_1,
> +};
> +
> +/**
> + * struct lp873x - state holder for the lp873x driver
> + * @dev: struct device pointer for MFD device
> + * @rev: revision of the lp873x
> + * @lock: lock guarding the data structure
> + * @regmap: register map of the lp873x PMIC
> + *
> + * Device data may be used to access the LP873X chip
> + */
> +struct lp873x {
> +	struct device *dev;
> +	u8 rev;
> +	struct mutex lock;	/* lock guarding the data structure */
> +	struct regmap *regmap;
> +};
> +#endif /* __LINUX_MFD_LP873X_H */

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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Re: [PATCH v9 1/3] mfd: lp873x: Add lp873x PMIC support

[Lee Jones]

On Wed, 31 Aug 2016, Keerthy wrote:

> The LP873X chip is a power management IC for Portable Navigation Systems
>     and Tablet Computing devices. It contains the following components:
> 
>      - Regulators.
>      - Configurable General Purpose Output Signals (GPO).
> 
> PMIC interacts with the main processor through i2c. PMIC has
> couple of LDOs (Linear Regulators), couple of BUCKs (Step-Down DC-DC
> Converter Cores) and GPOs (General Purpose Output Signals).
> 
> Signed-off-by: Keerthy <j-keerthy@ti.com>
> ---
>  drivers/mfd/Kconfig        |  14 +++
>  drivers/mfd/Makefile       |   2 +
>  drivers/mfd/lp873x.c       |  99 +++++++++++++++++
>  include/linux/mfd/lp873x.h | 269 +++++++++++++++++++++++++++++++++++++++++++++
>  4 files changed, 384 insertions(+)
>  create mode 100644 drivers/mfd/lp873x.c
>  create mode 100644 include/linux/mfd/lp873x.h

For my own reference:
  Acked-by: Lee Jones <lee.jones@linaro.org>

> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 2d1fb64..69e51d0 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -1224,6 +1224,20 @@ config MFD_TPS65217
>  	  This driver can also be built as a module.  If so, the module
>  	  will be called tps65217.
>  
> +config MFD_TI_LP873X
> +	tristate "TI LP873X Power Management IC"
> +	depends on I2C
> +	select MFD_CORE
> +	select REGMAP_I2C
> +	help
> +	  If you say yes here then you get support for the LP873X series of
> +	  Power Management Integrated Circuits (PMIC).
> +	  These include voltage regulators, thermal protection, configurable
> +	  General Purpose Outputs (GPO) that are used in portable devices.
> +
> +	  This driver can also be built as a module. If so, the module
> +	  will be called lp873x.
> +
>  config MFD_TPS65218
>  	tristate "TI TPS65218 Power Management chips"
>  	depends on I2C
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index 2ba3ba3..42acbcd 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -22,6 +22,8 @@ obj-$(CONFIG_HTC_EGPIO)		+= htc-egpio.o
>  obj-$(CONFIG_HTC_PASIC3)	+= htc-pasic3.o
>  obj-$(CONFIG_HTC_I2CPLD)	+= htc-i2cpld.o
>  
> +obj-$(CONFIG_MFD_TI_LP873X)	+= lp873x.o
> +
>  obj-$(CONFIG_MFD_DAVINCI_VOICECODEC)	+= davinci_voicecodec.o
>  obj-$(CONFIG_MFD_DM355EVM_MSP)	+= dm355evm_msp.o
>  obj-$(CONFIG_MFD_TI_AM335X_TSCADC)	+= ti_am335x_tscadc.o
> diff --git a/drivers/mfd/lp873x.c b/drivers/mfd/lp873x.c
> new file mode 100644
> index 0000000..4ab2401
> --- /dev/null
> +++ b/drivers/mfd/lp873x.c
> @@ -0,0 +1,99 @@
> +/*
> + * Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.com/
> + *
> + * Author: Keerthy <j-keerthy@ti.com>
> + *
> + * 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 version 2.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether express or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <linux/interrupt.h>
> +#include <linux/mfd/core.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include <linux/regmap.h>
> +
> +#include <linux/mfd/lp873x.h>
> +
> +static const struct regmap_config lp873x_regmap_config = {
> +	.reg_bits = 8,
> +	.val_bits = 8,
> +	.max_register = LP873X_REG_MAX,
> +};
> +
> +static const struct mfd_cell lp873x_cells[] = {
> +	{ .name = "lp873x-regulator", },
> +	{ .name = "lp873x-gpio", },
> +};
> +
> +static int lp873x_probe(struct i2c_client *client,
> +			const struct i2c_device_id *ids)
> +{
> +	struct lp873x *lp873;
> +	int ret;
> +	unsigned int otpid;
> +
> +	lp873 = devm_kzalloc(&client->dev, sizeof(*lp873), GFP_KERNEL);
> +	if (!lp873)
> +		return -ENOMEM;
> +
> +	lp873->dev = &client->dev;
> +
> +	lp873->regmap = devm_regmap_init_i2c(client, &lp873x_regmap_config);
> +	if (IS_ERR(lp873->regmap)) {
> +		ret = PTR_ERR(lp873->regmap);
> +		dev_err(lp873->dev,
> +			"Failed to initialize register map: %d\n", ret);
> +		return ret;
> +	}
> +
> +	mutex_init(&lp873->lock);
> +
> +	ret = regmap_read(lp873->regmap, LP873X_REG_OTP_REV, &otpid);
> +	if (ret) {
> +		dev_err(lp873->dev, "Failed to read OTP ID\n");
> +		return ret;
> +	}
> +
> +	lp873->rev = otpid & LP873X_OTP_REV_OTP_ID;
> +
> +	i2c_set_clientdata(client, lp873);
> +
> +	ret = mfd_add_devices(lp873->dev, PLATFORM_DEVID_AUTO, lp873x_cells,
> +			      ARRAY_SIZE(lp873x_cells), NULL, 0, NULL);
> +
> +	return ret;
> +}
> +
> +static const struct of_device_id of_lp873x_match_table[] = {
> +	{ .compatible = "ti,lp8733", },
> +	{ .compatible = "ti,lp8732", },
> +	{}
> +};
> +MODULE_DEVICE_TABLE(of, of_lp873x_match_table);
> +
> +static const struct i2c_device_id lp873x_id_table[] = {
> +	{ "lp873x", 0 },
> +	{ },
> +};
> +MODULE_DEVICE_TABLE(i2c, lp873x_id_table);
> +
> +static struct i2c_driver lp873x_driver = {
> +	.driver	= {
> +		.name	= "lp873x",
> +		.of_match_table = of_lp873x_match_table,
> +	},
> +	.probe		= lp873x_probe,
> +	.id_table	= lp873x_id_table,
> +};
> +module_i2c_driver(lp873x_driver);
> +
> +MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
> +MODULE_DESCRIPTION("LP873X chip family Multi-Function Device driver");
> +MODULE_LICENSE("GPL v2");
> diff --git a/include/linux/mfd/lp873x.h b/include/linux/mfd/lp873x.h
> new file mode 100644
> index 0000000..fc46f8a
> --- /dev/null
> +++ b/include/linux/mfd/lp873x.h
> @@ -0,0 +1,269 @@
> +/*
> + * Functions to access LP873X power management chip.
> + *
> + * Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.com/
> + *
> + * 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 version 2.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether express or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +#ifndef __LINUX_MFD_LP873X_H
> +#define __LINUX_MFD_LP873X_H
> +
> +#include <linux/i2c.h>
> +#include <linux/regulator/driver.h>
> +#include <linux/regulator/machine.h>
> +
> +/* LP873x chip id list */
> +#define LP873X			0x00
> +
> +/* All register addresses */
> +#define LP873X_REG_DEV_REV		0X00
> +#define LP873X_REG_OTP_REV		0X01
> +#define LP873X_REG_BUCK0_CTRL_1		0X02
> +#define LP873X_REG_BUCK0_CTRL_2		0X03
> +#define LP873X_REG_BUCK1_CTRL_1		0X04
> +#define LP873X_REG_BUCK1_CTRL_2		0X05
> +#define LP873X_REG_BUCK0_VOUT		0X06
> +#define LP873X_REG_BUCK1_VOUT		0X07
> +#define LP873X_REG_LDO0_CTRL		0X08
> +#define LP873X_REG_LDO1_CTRL            0X09
> +#define LP873X_REG_LDO0_VOUT		0X0A
> +#define LP873X_REG_LDO1_VOUT		0X0B
> +#define LP873X_REG_BUCK0_DELAY		0X0C
> +#define LP873X_REG_BUCK1_DELAY		0X0D
> +#define LP873X_REG_LDO0_DELAY		0X0E
> +#define LP873X_REG_LDO1_DELAY		0X0F
> +#define LP873X_REG_GPO_DELAY		0X10
> +#define LP873X_REG_GPO2_DELAY		0X11
> +#define LP873X_REG_GPO_CTRL		0X12
> +#define LP873X_REG_CONFIG		0X13
> +#define LP873X_REG_PLL_CTRL		0X14
> +#define LP873X_REG_PGOOD_CTRL1		0X15
> +#define LP873X_REG_PGOOD_CTRL2		0X16
> +#define LP873X_REG_PG_FAULT		0X17
> +#define LP873X_REG_RESET		0X18
> +#define LP873X_REG_INT_TOP_1		0X19
> +#define LP873X_REG_INT_TOP_2		0X1A
> +#define LP873X_REG_INT_BUCK		0X1B
> +#define LP873X_REG_INT_LDO		0X1C
> +#define LP873X_REG_TOP_STAT		0X1D
> +#define LP873X_REG_BUCK_STAT		0X1E
> +#define LP873X_REG_LDO_STAT		0x1F
> +#define LP873X_REG_TOP_MASK_1		0x20
> +#define LP873X_REG_TOP_MASK_2		0x21
> +#define LP873X_REG_BUCK_MASK		0x22
> +#define LP873X_REG_LDO_MASK		0x23
> +#define LP873X_REG_SEL_I_LOAD		0x24
> +#define LP873X_REG_I_LOAD_2		0x25
> +#define LP873X_REG_I_LOAD_1		0x26
> +
> +#define LP873X_REG_MAX			LP873X_REG_I_LOAD_1
> +
> +/* Register field definitions */
> +#define LP873X_DEV_REV_DEV_ID			0xC0
> +#define LP873X_DEV_REV_ALL_LAYER		0x30
> +#define LP873X_DEV_REV_METAL_LAYER		0x0F
> +
> +#define LP873X_OTP_REV_OTP_ID			0xFF
> +
> +#define LP873X_BUCK0_CTRL_1_BUCK0_FPWM		BIT(3)
> +#define LP873X_BUCK0_CTRL_1_BUCK0_RDIS_EN	BIT(2)
> +#define LP873X_BUCK0_CTRL_1_BUCK0_EN_PIN_CTRL	BIT(1)
> +#define LP873X_BUCK0_CTRL_1_BUCK0_EN		BIT(0)
> +
> +#define LP873X_BUCK0_CTRL_2_BUCK0_ILIM		0x38
> +#define LP873X_BUCK0_CTRL_2_BUCK0_SLEW_RATE	0x07
> +
> +#define LP873X_BUCK1_CTRL_1_BUCK1_FPWM		BIT(3)
> +#define LP873X_BUCK1_CTRL_1_BUCK1_RDIS_EN	BIT(2)
> +#define LP873X_BUCK1_CTRL_1_BUCK1_EN_PIN_CTRL	BIT(1)
> +#define LP873X_BUCK1_CTRL_1_BUCK1_EN		BIT(0)
> +
> +#define LP873X_BUCK1_CTRL_2_BUCK1_ILIM		0x38
> +#define LP873X_BUCK1_CTRL_2_BUCK1_SLEW_RATE	0x07
> +
> +#define LP873X_BUCK0_VOUT_BUCK0_VSET		0xFF
> +
> +#define LP873X_BUCK1_VOUT_BUCK1_VSET		0xFF
> +
> +#define LP873X_LDO0_CTRL_LDO0_RDIS_EN		BIT(2)
> +#define LP873X_LDO0_CTRL_LDO0_EN_PIN_CTRL	BIT(1)
> +#define LP873X_LDO0_CTRL_LDO0_EN		BIT(0)
> +
> +#define LP873X_LDO1_CTRL_LDO1_RDIS_EN		BIT(2)
> +#define LP873X_LDO1_CTRL_LDO1_EN_PIN_CTRL	BIT(1)
> +#define LP873X_LDO1_CTRL_LDO1_EN		BIT(0)
> +
> +#define LP873X_LDO0_VOUT_LDO0_VSET		0x1F
> +
> +#define LP873X_LDO1_VOUT_LDO1_VSET		0x1F
> +
> +#define LP873X_BUCK0_DELAY_BUCK0_SD_DELAY	0xF0
> +#define LP873X_BUCK0_DELAY_BUCK0_SU_DELAY	0x0F
> +
> +#define LP873X_BUCK1_DELAY_BUCK1_SD_DELAY	0xF0
> +#define LP873X_BUCK1_DELAY_BUCK1_SU_DELAY	0x0F
> +
> +#define LP873X_LDO0_DELAY_LDO0_SD_DELAY	0xF0
> +#define LP873X_LDO0_DELAY_LDO0_SU_DELAY	0x0F
> +
> +#define LP873X_LDO1_DELAY_LDO1_SD_DELAY	0xF0
> +#define LP873X_LDO1_DELAY_LDO1_SU_DELAY	0x0F
> +
> +#define LP873X_GPO_DELAY_GPO_SD_DELAY		0xF0
> +#define LP873X_GPO_DELAY_GPO_SU_DELAY		0x0F
> +
> +#define LP873X_GPO2_DELAY_GPO2_SD_DELAY	0xF0
> +#define LP873X_GPO2_DELAY_GPO2_SU_DELAY	0x0F
> +
> +#define LP873X_GPO_CTRL_GPO2_OD		BIT(6)
> +#define LP873X_GPO_CTRL_GPO2_EN_PIN_CTRL	BIT(5)
> +#define LP873X_GPO_CTRL_GPO2_EN		BIT(4)
> +#define LP873X_GPO_CTRL_GPO_OD			BIT(2)
> +#define LP873X_GPO_CTRL_GPO_EN_PIN_CTRL	BIT(1)
> +#define LP873X_GPO_CTRL_GPO_EN			BIT(0)
> +
> +#define LP873X_CONFIG_SU_DELAY_SEL		BIT(6)
> +#define LP873X_CONFIG_SD_DELAY_SEL		BIT(5)
> +#define LP873X_CONFIG_CLKIN_PIN_SEL		BIT(4)
> +#define LP873X_CONFIG_CLKIN_PD			BIT(3)
> +#define LP873X_CONFIG_EN_PD			BIT(2)
> +#define LP873X_CONFIG_TDIE_WARN_LEVEL		BIT(1)
> +#define LP873X_EN_SPREAD_SPEC			BIT(0)
> +
> +#define LP873X_PLL_CTRL_EN_PLL			BIT(6)
> +#define LP873X_EXT_CLK_FREQ			0x1F
> +
> +#define LP873X_PGOOD_CTRL1_PGOOD_POL		BIT(7)
> +#define LP873X_PGOOD_CTRL1_PGOOD_OD		BIT(6)
> +#define LP873X_PGOOD_CTRL1_PGOOD_WINDOW_LDO	BIT(5)
> +#define LP873X_PGOOD_CTRL1_PGOOD_WINDOWN_BUCK	BIT(4)
> +#define LP873X_PGOOD_CTRL1_PGOOD_EN_PGOOD_LDO1	BIT(3)
> +#define LP873X_PGOOD_CTRL1_PGOOD_EN_PGOOD_LDO0	BIT(2)
> +#define LP873X_PGOOD_CTRL1_PGOOD_EN_PGOOD_BUCK1	BIT(1)
> +#define LP873X_PGOOD_CTRL1_PGOOD_EN_PGOOD_BUCK0	BIT(0)
> +
> +#define LP873X_PGOOD_CTRL2_EN_PGOOD_TWARN	BIT(2)
> +#define LP873X_PGOOD_CTRL2_EN_PG_FAULT_GATE	BIT(1)
> +#define LP873X_PGOOD_CTRL2_PGOOD_MODE		BIT(0)
> +
> +#define LP873X_PG_FAULT_PG_FAULT_LDO1		BIT(3)
> +#define LP873X_PG_FAULT_PG_FAULT_LDO0		BIT(2)
> +#define LP873X_PG_FAULT_PG_FAULT_BUCK1		BIT(1)
> +#define LP873X_PG_FAULT_PG_FAULT_BUCK0		BIT(0)
> +
> +#define LP873X_RESET_SW_RESET			BIT(0)
> +
> +#define LP873X_INT_TOP_1_PGOOD_INT		BIT(7)
> +#define LP873X_INT_TOP_1_LDO_INT		BIT(6)
> +#define LP873X_INT_TOP_1_BUCK_INT		BIT(5)
> +#define LP873X_INT_TOP_1_SYNC_CLK_INT		BIT(4)
> +#define LP873X_INT_TOP_1_TDIE_SD_INT		BIT(3)
> +#define LP873X_INT_TOP_1_TDIE_WARN_INT		BIT(2)
> +#define LP873X_INT_TOP_1_OVP_INT		BIT(1)
> +#define LP873X_INT_TOP_1_I_MEAS_INT		BIT(0)
> +
> +#define LP873X_INT_TOP_2_RESET_REG_INT		BIT(0)
> +
> +#define LP873X_INT_BUCK_BUCK1_PG_INT		BIT(6)
> +#define LP873X_INT_BUCK_BUCK1_SC_INT		BIT(5)
> +#define LP873X_INT_BUCK_BUCK1_ILIM_INT		BIT(4)
> +#define LP873X_INT_BUCK_BUCK0_PG_INT		BIT(2)
> +#define LP873X_INT_BUCK_BUCK0_SC_INT		BIT(1)
> +#define LP873X_INT_BUCK_BUCK0_ILIM_INT		BIT(0)
> +
> +#define LP873X_INT_LDO_LDO1_PG_INT		BIT(6)
> +#define LP873X_INT_LDO_LDO1_SC_INT		BIT(5)
> +#define LP873X_INT_LDO_LDO1_ILIM_INT		BIT(4)
> +#define LP873X_INT_LDO_LDO0_PG_INT		BIT(2)
> +#define LP873X_INT_LDO_LDO0_SC_INT		BIT(1)
> +#define LP873X_INT_LDO_LDO0_ILIM_INT		BIT(0)
> +
> +#define LP873X_TOP_STAT_PGOOD_STAT		BIT(7)
> +#define LP873X_TOP_STAT_SYNC_CLK_STAT		BIT(4)
> +#define LP873X_TOP_STAT_TDIE_SD_STAT		BIT(3)
> +#define LP873X_TOP_STAT_TDIE_WARN_STAT		BIT(2)
> +#define LP873X_TOP_STAT_OVP_STAT		BIT(1)
> +
> +#define LP873X_BUCK_STAT_BUCK1_STAT		BIT(7)
> +#define LP873X_BUCK_STAT_BUCK1_PG_STAT		BIT(6)
> +#define LP873X_BUCK_STAT_BUCK1_ILIM_STAT	BIT(4)
> +#define LP873X_BUCK_STAT_BUCK0_STAT		BIT(3)
> +#define LP873X_BUCK_STAT_BUCK0_PG_STAT		BIT(2)
> +#define LP873X_BUCK_STAT_BUCK0_ILIM_STAT	BIT(0)
> +
> +#define LP873X_LDO_STAT_LDO1_STAT		BIT(7)
> +#define LP873X_LDO_STAT_LDO1_PG_STAT		BIT(6)
> +#define LP873X_LDO_STAT_LDO1_ILIM_STAT		BIT(4)
> +#define LP873X_LDO_STAT_LDO0_STAT		BIT(3)
> +#define LP873X_LDO_STAT_LDO0_PG_STAT		BIT(2)
> +#define LP873X_LDO_STAT_LDO0_ILIM_STAT		BIT(0)
> +
> +#define LP873X_TOP_MASK_1_PGOOD_INT_MASK	BIT(7)
> +#define LP873X_TOP_MASK_1_SYNC_CLK_MASK	BIT(4)
> +#define LP873X_TOP_MASK_1_TDIE_WARN_MASK	BIT(2)
> +#define LP873X_TOP_MASK_1_I_MEAS_MASK		BIT(0)
> +
> +#define LP873X_TOP_MASK_2_RESET_REG_MASK	BIT(0)
> +
> +#define LP873X_BUCK_MASK_BUCK1_PGF_MASK	BIT(7)
> +#define LP873X_BUCK_MASK_BUCK1_PGR_MASK	BIT(6)
> +#define LP873X_BUCK_MASK_BUCK1_ILIM_MASK	BIT(4)
> +#define LP873X_BUCK_MASK_BUCK0_PGF_MASK	BIT(3)
> +#define LP873X_BUCK_MASK_BUCK0_PGR_MASK	BIT(2)
> +#define LP873X_BUCK_MASK_BUCK0_ILIM_MASK	BIT(0)
> +
> +#define LP873X_LDO_MASK_LDO1_PGF_MASK		BIT(7)
> +#define LP873X_LDO_MASK_LDO1_PGR_MASK		BIT(6)
> +#define LP873X_LDO_MASK_LDO1_ILIM_MASK		BIT(4)
> +#define LP873X_LDO_MASK_LDO0_PGF_MASK		BIT(3)
> +#define LP873X_LDO_MASK_LDO0_PGR_MASK		BIT(2)
> +#define LP873X_LDO_MASK_LDO0_ILIM_MASK		BIT(0)
> +
> +#define LP873X_SEL_I_LOAD_CURRENT_BUCK_SELECT	BIT(0)
> +
> +#define LP873X_I_LOAD_2_BUCK_LOAD_CURRENT	BIT(0)
> +
> +#define LP873X_I_LOAD_1_BUCK_LOAD_CURRENT	0xFF
> +
> +#define LP873X_MAX_REG_ID		LP873X_LDO_1
> +
> +/* Number of step-down converters available */
> +#define LP873X_NUM_BUCK		2
> +/* Number of LDO voltage regulators available */
> +#define LP873X_NUM_LDO		2
> +/* Number of total regulators available */
> +#define LP873X_NUM_REGULATOR		(LP873X_NUM_BUCK + LP873X_NUM_LDO)
> +
> +enum lp873x_regulator_id {
> +	/* BUCK's */
> +	LP873X_BUCK_0,
> +	LP873X_BUCK_1,
> +	/* LDOs */
> +	LP873X_LDO_0,
> +	LP873X_LDO_1,
> +};
> +
> +/**
> + * struct lp873x - state holder for the lp873x driver
> + * @dev: struct device pointer for MFD device
> + * @rev: revision of the lp873x
> + * @lock: lock guarding the data structure
> + * @regmap: register map of the lp873x PMIC
> + *
> + * Device data may be used to access the LP873X chip
> + */
> +struct lp873x {
> +	struct device *dev;
> +	u8 rev;
> +	struct mutex lock;	/* lock guarding the data structure */
> +	struct regmap *regmap;
> +};
> +#endif /* __LINUX_MFD_LP873X_H */

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

[GIT PULL] Immutable branch between MFD, GPIO and Regulator due for the v4.9 merge window

[Lee Jones]

Enjoy!

The following changes since commit 694d0d0bb2030d2e36df73e2d23d5770511dbc8d:

  Linux 4.8-rc2 (2016-08-14 19:11:36 -0700)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git ib-mfd-gpio-regulator-v4.9

for you to fetch changes up to f618ed218dc01207882a8f02b1310c7daaf5156a:

  regulator: lp873x: Change the MFD config option as per latest naming (2016-08-31 13:20:44 +0100)

----------------------------------------------------------------
Immutable branch between MFD, GPIO and Regulator due for the v4.9 merge window

----------------------------------------------------------------
Keerthy (3):
      mfd: lp873x: Add lp873x PMIC support
      gpio: lp873x: Add support for General Purpose Outputs
      regulator: lp873x: Change the MFD config option as per latest naming

 drivers/gpio/Kconfig       |  10 ++
 drivers/gpio/Makefile      |   1 +
 drivers/gpio/gpio-lp873x.c | 193 ++++++++++++++++++++++++++++++++
 drivers/mfd/Kconfig        |  14 +++
 drivers/mfd/Makefile       |   2 +
 drivers/mfd/lp873x.c       |  99 +++++++++++++++++
 drivers/regulator/Kconfig  |   2 +-
 include/linux/mfd/lp873x.h | 269 +++++++++++++++++++++++++++++++++++++++++++++
 8 files changed, 589 insertions(+), 1 deletion(-)
 create mode 100644 drivers/gpio/gpio-lp873x.c
 create mode 100644 drivers/mfd/lp873x.c
 create mode 100644 include/linux/mfd/lp873x.h

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [GIT PULL] Immutable branch between MFD, GPIO and Regulator due for the v4.9 merge window

[Keerthy]

On Wednesday 31 August 2016 05:54 PM, Lee Jones wrote:
> Enjoy!

Thanks! Just curious to know where to pull the below patch from:

https://patchwork.kernel.org/patch/9266665/

I checked in couple of other branches in your tree could not find the 
above patch.

Regards,
Keerthy

>
> The following changes since commit 694d0d0bb2030d2e36df73e2d23d5770511dbc8d:
>
>   Linux 4.8-rc2 (2016-08-14 19:11:36 -0700)
>
> are available in the git repository at:
>
>   git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git ib-mfd-gpio-regulator-v4.9
>
> for you to fetch changes up to f618ed218dc01207882a8f02b1310c7daaf5156a:
>
>   regulator: lp873x: Change the MFD config option as per latest naming (2016-08-31 13:20:44 +0100)
>
> ----------------------------------------------------------------
> Immutable branch between MFD, GPIO and Regulator due for the v4.9 merge window
>
> ----------------------------------------------------------------
> Keerthy (3):
>       mfd: lp873x: Add lp873x PMIC support
>       gpio: lp873x: Add support for General Purpose Outputs
>       regulator: lp873x: Change the MFD config option as per latest naming
>
>  drivers/gpio/Kconfig       |  10 ++
>  drivers/gpio/Makefile      |   1 +
>  drivers/gpio/gpio-lp873x.c | 193 ++++++++++++++++++++++++++++++++
>  drivers/mfd/Kconfig        |  14 +++
>  drivers/mfd/Makefile       |   2 +
>  drivers/mfd/lp873x.c       |  99 +++++++++++++++++
>  drivers/regulator/Kconfig  |   2 +-
>  include/linux/mfd/lp873x.h | 269 +++++++++++++++++++++++++++++++++++++++++++++
>  8 files changed, 589 insertions(+), 1 deletion(-)
>  create mode 100644 drivers/gpio/gpio-lp873x.c
>  create mode 100644 drivers/mfd/lp873x.c
>  create mode 100644 include/linux/mfd/lp873x.h
>
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Re: [GIT PULL] Immutable branch between MFD, GPIO and Regulator due for the v4.9 merge window

[Keerthy]

On Wednesday 31 August 2016 05:54 PM, Lee Jones wrote:
> Enjoy!

Thanks! Just curious to know where to pull the below patch from:

https://patchwork.kernel.org/patch/9266665/

I checked in couple of other branches in your tree could not find the 
above patch.

Regards,
Keerthy

>
> The following changes since commit 694d0d0bb2030d2e36df73e2d23d5770511dbc8d:
>
>   Linux 4.8-rc2 (2016-08-14 19:11:36 -0700)
>
> are available in the git repository at:
>
>   git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git ib-mfd-gpio-regulator-v4.9
>
> for you to fetch changes up to f618ed218dc01207882a8f02b1310c7daaf5156a:
>
>   regulator: lp873x: Change the MFD config option as per latest naming (2016-08-31 13:20:44 +0100)
>
> ----------------------------------------------------------------
> Immutable branch between MFD, GPIO and Regulator due for the v4.9 merge window
>
> ----------------------------------------------------------------
> Keerthy (3):
>       mfd: lp873x: Add lp873x PMIC support
>       gpio: lp873x: Add support for General Purpose Outputs
>       regulator: lp873x: Change the MFD config option as per latest naming
>
>  drivers/gpio/Kconfig       |  10 ++
>  drivers/gpio/Makefile      |   1 +
>  drivers/gpio/gpio-lp873x.c | 193 ++++++++++++++++++++++++++++++++
>  drivers/mfd/Kconfig        |  14 +++
>  drivers/mfd/Makefile       |   2 +
>  drivers/mfd/lp873x.c       |  99 +++++++++++++++++
>  drivers/regulator/Kconfig  |   2 +-
>  include/linux/mfd/lp873x.h | 269 +++++++++++++++++++++++++++++++++++++++++++++
>  8 files changed, 589 insertions(+), 1 deletion(-)
>  create mode 100644 drivers/gpio/gpio-lp873x.c
>  create mode 100644 drivers/mfd/lp873x.c
>  create mode 100644 include/linux/mfd/lp873x.h
>

Re: [GIT PULL] Immutable branch between MFD, GPIO and Regulator due for the v4.9 merge window

[Lee Jones]

On Wed, 31 Aug 2016, Keerthy wrote:

> On Wednesday 31 August 2016 05:54 PM, Lee Jones wrote:
> > Enjoy!
> 
> Thanks! Just curious to know where to pull the below patch from:
> 
> https://patchwork.kernel.org/patch/9266665/
> 
> I checked in couple of other branches in your tree could not find the above
> patch.

The name has changed.  Pull my MFD branch and look for:

  ea7f225 Documentation: mfd: Add DT bindings for the LP873X

> > The following changes since commit 694d0d0bb2030d2e36df73e2d23d5770511dbc8d:
> > 
> >   Linux 4.8-rc2 (2016-08-14 19:11:36 -0700)
> > 
> > are available in the git repository at:
> > 
> >   git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git ib-mfd-gpio-regulator-v4.9
> > 
> > for you to fetch changes up to f618ed218dc01207882a8f02b1310c7daaf5156a:
> > 
> >   regulator: lp873x: Change the MFD config option as per latest naming (2016-08-31 13:20:44 +0100)
> > 
> > ----------------------------------------------------------------
> > Immutable branch between MFD, GPIO and Regulator due for the v4.9 merge window
> > 
> > ----------------------------------------------------------------
> > Keerthy (3):
> >       mfd: lp873x: Add lp873x PMIC support
> >       gpio: lp873x: Add support for General Purpose Outputs
> >       regulator: lp873x: Change the MFD config option as per latest naming
> > 
> >  drivers/gpio/Kconfig       |  10 ++
> >  drivers/gpio/Makefile      |   1 +
> >  drivers/gpio/gpio-lp873x.c | 193 ++++++++++++++++++++++++++++++++
> >  drivers/mfd/Kconfig        |  14 +++
> >  drivers/mfd/Makefile       |   2 +
> >  drivers/mfd/lp873x.c       |  99 +++++++++++++++++
> >  drivers/regulator/Kconfig  |   2 +-
> >  include/linux/mfd/lp873x.h | 269 +++++++++++++++++++++++++++++++++++++++++++++
> >  8 files changed, 589 insertions(+), 1 deletion(-)
> >  create mode 100644 drivers/gpio/gpio-lp873x.c
> >  create mode 100644 drivers/mfd/lp873x.c
> >  create mode 100644 include/linux/mfd/lp873x.h
> > 

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [GIT PULL] Immutable branch between MFD, GPIO and Regulator due for the v4.9 merge window

[Linus Walleij]

On Wed, Aug 31, 2016 at 2:24 PM, Lee Jones <lee.jones@linaro.org> wrote:

> The following changes since commit 694d0d0bb2030d2e36df73e2d23d5770511dbc8d:
>
>   Linux 4.8-rc2 (2016-08-14 19:11:36 -0700)
>
> are available in the git repository at:
>
>   git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git ib-mfd-gpio-regulator-v4.9

Hm it is based on a later release candidate than my tree so I'll wait
and see if I
have to pull it (like if there are clashes in linux-next...)

Yours,
Linus Walleij

Re: [GIT PULL] Immutable branch between MFD, GPIO and Regulator due for the v4.9 merge window

[Lee Jones]

On Wed, 07 Sep 2016, Linus Walleij wrote:

> On Wed, Aug 31, 2016 at 2:24 PM, Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> wrote:
> 
> > The following changes since commit 694d0d0bb2030d2e36df73e2d23d5770511dbc8d:
> >
> >   Linux 4.8-rc2 (2016-08-14 19:11:36 -0700)
> >
> > are available in the git repository at:
> >
> >   git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git ib-mfd-gpio-regulator-v4.9
> 
> Hm it is based on a later release candidate than my tree so I'll wait
> and see if I
> have to pull it (like if there are clashes in linux-next...)

You use -rc1 as your base?  Crazy man. :)

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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Re: [GIT PULL] Immutable branch between MFD, GPIO and Regulator due for the v4.9 merge window

[Lee Jones]

On Wed, 07 Sep 2016, Linus Walleij wrote:

> On Wed, Aug 31, 2016 at 2:24 PM, Lee Jones <lee.jones@linaro.org> wrote:
> 
> > The following changes since commit 694d0d0bb2030d2e36df73e2d23d5770511dbc8d:
> >
> >   Linux 4.8-rc2 (2016-08-14 19:11:36 -0700)
> >
> > are available in the git repository at:
> >
> >   git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git ib-mfd-gpio-regulator-v4.9
> 
> Hm it is based on a later release candidate than my tree so I'll wait
> and see if I
> have to pull it (like if there are clashes in linux-next...)

You use -rc1 as your base?  Crazy man. :)

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [GIT PULL] Immutable branch between MFD, GPIO and Regulator due for the v4.9 merge window

[Mark Brown]

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On Thu, Sep 08, 2016 at 08:26:46AM +0100, Lee Jones wrote:
> On Wed, 07 Sep 2016, Linus Walleij wrote:

> > Hm it is based on a later release candidate than my tree so I'll wait
> > and see if I
> > have to pull it (like if there are clashes in linux-next...)

> You use -rc1 as your base?  Crazy man. :)

I do that too for the topic branches.  It's really helpful for cross
tree work as it avoids issues like the above - wherever it's being
merges it shouldn't pull in any extra dependencies so things are clearer
when reviewing diffs/logs and git has an easier time coping.

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Re: [GIT PULL] Immutable branch between MFD, GPIO and Regulator due for the v4.9 merge window

[Mark Brown]

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On Thu, Sep 08, 2016 at 08:26:46AM +0100, Lee Jones wrote:
> On Wed, 07 Sep 2016, Linus Walleij wrote:

> > Hm it is based on a later release candidate than my tree so I'll wait
> > and see if I
> > have to pull it (like if there are clashes in linux-next...)

> You use -rc1 as your base?  Crazy man. :)

I do that too for the topic branches.  It's really helpful for cross
tree work as it avoids issues like the above - wherever it's being
merges it shouldn't pull in any extra dependencies so things are clearer
when reviewing diffs/logs and git has an easier time coping.

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 473 bytes --]

Re: [GIT PULL] Immutable branch between MFD, GPIO and Regulator due for the v4.9 merge window

[Lee Jones]

On Fri, 09 Sep 2016, Mark Brown wrote:

> On Thu, Sep 08, 2016 at 08:26:46AM +0100, Lee Jones wrote:
> > On Wed, 07 Sep 2016, Linus Walleij wrote:
> 
> > > Hm it is based on a later release candidate than my tree so I'll wait
> > > and see if I
> > > have to pull it (like if there are clashes in linux-next...)
> 
> > You use -rc1 as your base?  Crazy man. :)
> 
> I do that too for the topic branches.  It's really helpful for cross
> tree work as it avoids issues like the above - wherever it's being
> merges it shouldn't pull in any extra dependencies so things are clearer
> when reviewing diffs/logs and git has an easier time coping.

I've always used -rc2 for everything.  It's usually more stable for
build-testing purposes.  But I'll bow down, and try to use -rc1 in
future, if it's preferred.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [GIT PULL] Immutable branch between MFD, GPIO and Regulator due for the v4.9 merge window

[Linus Walleij]

On Wed, Sep 7, 2016 at 10:03 PM, Linus Walleij <linus.walleij@linaro.org> wrote:
> On Wed, Aug 31, 2016 at 2:24 PM, Lee Jones <lee.jones@linaro.org> wrote:
>
>> The following changes since commit 694d0d0bb2030d2e36df73e2d23d5770511dbc8d:
>>
>>   Linux 4.8-rc2 (2016-08-14 19:11:36 -0700)
>>
>> are available in the git repository at:
>>
>>   git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git ib-mfd-gpio-regulator-v4.9
>
> Hm it is based on a later release candidate than my tree so I'll wait
> and see if I
> have to pull it (like if there are clashes in linux-next...)

Bah I'm getting patches for the GPIO driver so I caved in and
merged v4.8-rc1 and then pulled in this, all looks good.

Yours,
Linus Walleij