Message-ID: <20160517104912.GH17238@dell>
Date:	Tue, 17 May 2016 11:49:12 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Keerthy <a0393675@...com>
Cc:	Keerthy <j-keerthy@...com>, broonie@...nel.org, tony@...mide.com,
	robh+dt@...nel.org, mark.rutland@....com,
	linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH v3 2/2] mfd: lp873x: Add lp873x PMIC support

On Tue, 17 May 2016, Keerthy wrote:

> 
> 
> On Friday 13 May 2016 09:18 AM, 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).
> 
> Hi Lee Jones,
> 
> I fixed your comments on v2 and posted this version last week.

I can see it.  It's marked as "to-review" in my Inbox.

Sending pings will not speed up the process.

... and the merge window is open too.

> >Signed-off-by: Keerthy <j-keerthy@...com>
> >---
> >
> >Changes in v3:
> >
> >   * Reordered the probe code.
> >   * Fixed Typo in Kconfig description.
> >   * Removed unused member from struct lp873x.
> >
> >  drivers/mfd/Kconfig        |  14 +++
> >  drivers/mfd/Makefile       |   2 +
> >  drivers/mfd/lp873x.c       |  96 +++++++++++++++++
> >  include/linux/mfd/lp873x.h | 264 +++++++++++++++++++++++++++++++++++++++++++++
> >  4 files changed, 376 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 eea61e3..a7e48e7 100644
> >--- a/drivers/mfd/Kconfig
> >+++ b/drivers/mfd/Kconfig
> >@@ -1185,6 +1185,20 @@ config MFD_TPS65217
> >  	  This driver can also be built as a module.  If so, the module
> >  	  will be called tps65217.
> >
> >+config MFD_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 5eaa6465d..617c688 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_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..ba49d56
> >--- /dev/null
> >+++ b/drivers/mfd/lp873x.c
> >@@ -0,0 +1,96 @@
> >+/*
> >+ * 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.
> >+ */
> >+
> >+#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", },
> >+};
> >+
> >+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->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", LP873X },
> >+	{ "lp8732", LP873X },
> >+	{ "lp8733", LP873X },
> >+	{ },
> >+};
> >+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@...com>");
> >+MODULE_DESCRIPTION("LP873X chip family multi-function 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..fb7ec55
> >--- /dev/null
> >+++ b/include/linux/mfd/lp873x.h
> >@@ -0,0 +1,264 @@
> >+/*
> >+ * 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
> >+ * Device data may be used to access the LP873X chip
> >+ */
> >+struct lp873x {
> >+	struct device *dev;
> >+	u8 rev;
> >+	struct mutex lp873_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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