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Message-ID: <CAKew6eVZcW4NHJZAqmb940D3MKREUpLLc4gJfqSn3sMF2ZCHkA@mail.gmail.com>
Date: Tue, 22 May 2012 19:17:24 +0530
From: Yadwinder Singh Brar <yadi.brar01@...il.com>
To: Samuel Ortiz <sameo@...ux.intel.com>, linux-kernel@...r.kernel.org
Cc: linux-samsung-soc@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
Mark Brown <broonie@...nsource.wolfsonmicro.com>,
Liam Girdwood <lrg@...com>,
Yadwinder Singh Brar <yadi.brar@...sung.com>
Subject: Re: [PATCH v3 1/2] mfd: Add support for MAX77686.
CC' ing to maintainer.
(I forget to add maintainer in cc, sorry for noise).
On Tue, May 22, 2012 at 11:26 AM, <yadi.brar01@...il.com> wrote:
> From: Yadwinder Singh Brar <yadi.brar@...sung.com>
>
> MAX77686 is a mulitifunction device with PMIC, RTC and Charger on chip. Th
> driver provides common support for accessing the device. This is initial
> version of this driver that supports to enable the chip with its primary I
> bus.It also includes IRQ and device tree support for MAX77686 chip.
>
> Signed-off-by: Yadwinder Singh Brar <yadi.brar@...sung.com>
> Reviewed-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>
> ---
> Documentation/devicetree/bindings/mfd/max77686.txt | 61 ++++
> drivers/mfd/Kconfig | 21 ++
> drivers/mfd/Makefile | 1 +
> drivers/mfd/max77686-irq.c | 255 ++++++++++++++++
> drivers/mfd/max77686.c | 322 ++++++++++++++++++++
> include/linux/mfd/max77686-private.h | 282 +++++++++++++++++
> include/linux/mfd/max77686.h | 100 ++++++
> 7 files changed, 1042 insertions(+), 0 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/mfd/max77686.txt
> create mode 100644 drivers/mfd/max77686-irq.c
> create mode 100644 drivers/mfd/max77686.c
> create mode 100644 include/linux/mfd/max77686-private.h
> create mode 100644 include/linux/mfd/max77686.h
>
> diff --git a/Documentation/devicetree/bindings/mfd/max77686.txt b/Documentation/devicetree/bindings/mfd/max77686.txt
> new file mode 100644
> index 0000000..78a47bd
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/max77686.txt
> @@ -0,0 +1,61 @@
> +Maxim MAX77686 multi-function device
> +
> +MAX77686 is a Mulitifunction device with PMIC, RTC and Charger on chip. It is
> +interfaced to host controller using i2c interface. PMIC and Charger submodules
> +are addressed using same i2c slave address where as RTC submodule uses
> +different slave address,presently for which we are statically creating i2c
> +client while probing.This document describes the binding for mfd device and
> +PMIC submodule.
> +
> +Required properties:
> +- compatible : Must be "maxim,max77686";
> +- reg : Specifiec the i2c slave address of PMIC block.
> +- interrupts : This i2c device has an IRQ line connected to the main SoC.
> +- interrupt-parent : The parent interrupt controller.
> +
> +Optional node:
> +- max77686,buck_ramp_delay : Ramp delay to be setup for buck2,3&4.
> +
> +- voltage-regulators : The regulators of max77686 have to be instantiated
> + under subnode named "voltage-regulators" uing the following format.
> +
> + regulator_name {
> + standard regulator constraints....
> + };
> + refer Documentation/devicetree/bindings/regulator/regulator.txt
> +
> + The names of regulator should be as follow:
> +
> + -LDOn : for LDOs, where n can lie in range 1 to 26.
> + example: LDO1, LDO2, LDO26.
> + -BUCKn : for BUCKs, where n can lie in range 1 to 9.
> + example: BUCK1, BUCK5, BUCK9.
> +
> +
> +Example:
> +
> + max77686_pmic@09 {
> + compatible = "maxim,max77686";
> + interrupt-parent = <&wakeup_eint>;
> + interrupts = <26 0>;
> + reg = <0x09>;
> +
> + max77686,buck_ramp_delay = <2>; /* default */
> +
> + voltage-regulators {
> + ldo11_reg: LDO11 {
> + regulator-name = "vdd_ldo11";
> + regulator-min-microvolt = <1900000>;
> + regulator-max-microvolt = <1900000>;
> + regulator-always-on;
> + };
> +
> + buck1_reg: BUCK1 {
> + regulator-name = "vdd_mif";
> + regulator-min-microvolt = <950000>;
> + regulator-max-microvolt = <1300000>;
> + regulator-always-on;
> + regulator-boot-on;
> + };
> + }
> +
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index a4fd173..d8285e5 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -442,6 +442,27 @@ config MFD_MAX8998
> additional drivers must be enabled in order to use the functionality
> of the device.
>
> +config MFD_MAX77686
> + bool "Maxim Semiconductor MAX77686 PMIC Support"
> + depends on I2C=y && GENERIC_HARDIRQS
> + select MFD_CORE
> + select REGMAP_I2C
> + help
> + Say yes here to support for Maxim Semiconductor MAX77686.
> + This is a Power Management IC with RTC on chip.
> + This driver provides common support for accessing the device;
> + additional drivers must be enabled in order to use the functionality
> + of the device.
> +
> +config DEBUG_MAX77686
> + bool "MAX77686 PMIC debugging"
> + depends on MFD_MAX77686
> + help
> + Say yes, if you need enable debug messages in
> + MFD_MAX77686 driver.
> + Further for enabling/disabling particular type of debug
> + messages set max77686_debug_mask accordingly.
> +
> config MFD_S5M_CORE
> bool "SAMSUNG S5M Series Support"
> depends on I2C=y && GENERIC_HARDIRQS
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index 05fa538..19ecca9 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -79,6 +79,7 @@ max8925-objs := max8925-core.o max8925-i2c.o
> obj-$(CONFIG_MFD_MAX8925) += max8925.o
> obj-$(CONFIG_MFD_MAX8997) += max8997.o max8997-irq.o
> obj-$(CONFIG_MFD_MAX8998) += max8998.o max8998-irq.o
> +obj-$(CONFIG_MFD_MAX77686) += max77686.o max77686-irq.o
>
> pcf50633-objs := pcf50633-core.o pcf50633-irq.o
> obj-$(CONFIG_MFD_PCF50633) += pcf50633.o
> diff --git a/drivers/mfd/max77686-irq.c b/drivers/mfd/max77686-irq.c
> new file mode 100644
> index 0000000..f57b96e
> --- /dev/null
> +++ b/drivers/mfd/max77686-irq.c
> @@ -0,0 +1,255 @@
> +/*
> + * max77686-irq.c - Interrupt controller support for MAX77686
> + *
> + * Copyright (C) 2012 Samsung Electronics Co.Ltd
> + * Chiwoong Byun <woong.byun@...sung.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; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> + *
> + * This driver is based on max8997-irq.c
> + */
> +
> +#include <linux/err.h>
> +#include <linux/irq.h>
> +#include <linux/interrupt.h>
> +#include <linux/mfd/max77686.h>
> +#include <linux/mfd/max77686-private.h>
> +#include <linux/irqdomain.h>
> +
> +#define IRQ_GRP (data->hwirq >> 3)
> +#define IRQ_MASK (1 << (data->hwirq & 7))
> +
> +int max77686_debug_mask = MAX77686_DEBUG_INFO; /* enable debug prints */
> +
> +static const int max77686_mask_reg[] = {
> + [PMIC_INT1] = MAX77686_REG_INT1MSK,
> + [PMIC_INT2] = MAX77686_REG_INT2MSK,
> + [RTC_INT] = MAX77686_RTC_INTM,
> +};
> +
> +static struct i2c_client *max77686_get_i2c(struct max77686_dev *max77686,
> + enum max77686_irq_source src)
> +{
> + switch (src) {
> + case PMIC_INT1...PMIC_INT2:
> + return max77686->i2c;
> + case RTC_INT:
> + return max77686->rtc;
> + default:
> + return ERR_PTR(-EINVAL);
> + }
> +}
> +
> +static void max77686_irq_lock(struct irq_data *data)
> +{
> + struct max77686_dev *max77686 = irq_get_chip_data(data->irq);
> +
> + mutex_lock(&max77686->irqlock);
> +}
> +
> +static void max77686_irq_sync_unlock(struct irq_data *data)
> +{
> + struct max77686_dev *max77686 = irq_get_chip_data(data->irq);
> + int i;
> +
> + for (i = 0; i < MAX77686_IRQ_GROUP_NR; i++) {
> + int mask_reg = max77686_mask_reg[i];
> + struct i2c_client *i2c = max77686_get_i2c(max77686, i);
> +
> + dbg_mask("%s: mask_reg[%d]=0x%x, cur=0x%x\n",
> + __func__, i, mask_reg, max77686->irq_masks_cur[i]);
> +
> + if (mask_reg == MAX77686_REG_INVALID || IS_ERR_OR_NULL(i2c))
> + continue;
> +
> + max77686->irq_masks_cache[i] = max77686->irq_masks_cur[i];
> +
> + max77686_write_reg(i2c, max77686_mask_reg[i],
> + max77686->irq_masks_cur[i]);
> + }
> +
> + mutex_unlock(&max77686->irqlock);
> +}
> +
> +static void max77686_irq_mask(struct irq_data *data)
> +{
> + struct max77686_dev *max77686 = irq_get_chip_data(data->irq);
> +
> + max77686->irq_masks_cur[IRQ_GRP] |= IRQ_MASK;
> + dbg_mask("%s: group=%x, cur=0x%x\n",
> + __func__, IRQ_GRP,
> + max77686->irq_masks_cur[IRQ_GRP]);
> +
> +}
> +
> +static void max77686_irq_unmask(struct irq_data *data)
> +{
> + struct max77686_dev *max77686 = irq_get_chip_data(data->irq);
> +
> + max77686->irq_masks_cur[IRQ_GRP] &= ~IRQ_MASK;
> + dbg_mask("%s: group=%x, cur=0x%x\n",
> + __func__, IRQ_GRP,
> + max77686->irq_masks_cur[IRQ_GRP]);
> +
> +}
> +
> +static struct irq_chip max77686_irq_chip = {
> + .name = "max77686",
> + .irq_bus_lock = max77686_irq_lock,
> + .irq_bus_sync_unlock = max77686_irq_sync_unlock,
> + .irq_mask = max77686_irq_mask,
> + .irq_unmask = max77686_irq_unmask,
> +};
> +
> +static irqreturn_t max77686_irq_thread(int irq, void *data)
> +{
> + struct max77686_dev *max77686 = data;
> + int irq_reg[MAX77686_IRQ_GROUP_NR] = { };
> + int irq_src;
> + int ret, grp, i, cur_irq;
> +
> + ret = max77686_read_reg(max77686->i2c, MAX77686_REG_INTSRC, &irq_src);
> + if (ret < 0) {
> + dev_err(max77686->dev, "Failed to read interrupt source: %d\n",
> + ret);
> + return IRQ_NONE;
> + }
> +
> + ret = max77686_bulk_read(max77686->i2c, MAX77686_REG_INT1,
> + 2, irq_reg);
> + if (ret < 0) {
> + dev_err(max77686->dev,
> + "Failed to read pmic interrupt: %d\n", ret);
> + return IRQ_NONE;
> + }
> +
> + dbg_int("%s: int1=0x%x, int2=0x%x\n", __func__,
> + irq_reg[PMIC_INT1], irq_reg[PMIC_INT2]);
> +
> + if (irq_src & MAX77686_IRQSRC_RTC) {
> + ret = max77686_read_reg(max77686->rtc, MAX77686_RTC_INT,
> + &irq_reg[RTC_INT]);
> + if (ret < 0) {
> + dev_err(max77686->dev,
> + "Failed to read rtc interrupt: %d\n", ret);
> + return IRQ_NONE;
> + }
> + dbg_int("%s: rtc int=0x%x\n", __func__,
> + irq_reg[RTC_INT]);
> +
> + }
> +
> + for (grp = 0; grp < MAX77686_IRQ_GROUP_NR; grp++) {
> + irq_reg[grp] &= ~max77686->irq_masks_cur[grp];
> + i = 0;
> + while (irq_reg[grp]) {
> + if (irq_reg[grp] & (1 << i)) {
> + cur_irq = irq_find_mapping(max77686->irq_domain,
> + grp*8 + i);
> + if (cur_irq)
> + handle_nested_irq(cur_irq);
> +
> + irq_reg[grp] &= ~(1 << i);
> + dbg_int("%s: Handled irq:%x from group:%x\n",
> + __func__, i, grp);
> + }
> + i++;
> + }
> + }
> +
> + dbg_info("%s returning\n", __func__);
> +
> + return IRQ_HANDLED;
> +}
> +
> +int max77686_irq_resume(struct max77686_dev *max77686)
> +{
> + if (max77686->irq && max77686->irq_domain)
> + max77686_irq_thread(0, max77686);
> +
> + return 0;
> +}
> +
> +static int max77686_irq_domain_map(struct irq_domain *d, unsigned int irq,
> + irq_hw_number_t hw)
> +{
> + struct max77686_dev *max77686 = d->host_data;
> +
> + irq_set_chip_data(irq, max77686);
> + irq_set_chip_and_handler(irq, &max77686_irq_chip, handle_edge_irq);
> + irq_set_nested_thread(irq, 1);
> + set_irq_flags(irq, IRQF_VALID);
> + return 0;
> +}
> +
> +static struct irq_domain_ops max77686_irq_domain_ops = {
> + .map = max77686_irq_domain_map,
> +};
> +
> +int max77686_irq_init(struct max77686_dev *max77686)
> +{
> + int i, ret;
> + struct irq_domain *domain;
> +
> + if (!max77686->irq) {
> + dev_err(max77686->dev,
> + "No interrupt specified.\n");
> + return -ENODEV;
> + }
> +
> + mutex_init(&max77686->irqlock);
> +
> + /* Mask individual interrupt sources */
> + for (i = 0; i < MAX77686_IRQ_GROUP_NR; i++) {
> + struct i2c_client *i2c;
> +
> + max77686->irq_masks_cur[i] = 0xff;
> + max77686->irq_masks_cache[i] = 0xff;
> + i2c = max77686_get_i2c(max77686, i);
> +
> + if (IS_ERR_OR_NULL(i2c))
> + continue;
> + if (max77686_mask_reg[i] == MAX77686_REG_INVALID)
> + continue;
> +
> + max77686_write_reg(i2c, max77686_mask_reg[i], 0xff);
> + }
> +
> + domain = irq_domain_add_linear(NULL, MAX77686_IRQ_NR,
> + &max77686_irq_domain_ops, &max77686);
> + if (!domain) {
> + dev_err(max77686->dev, "could not create irq domain\n");
> + return -ENODEV;
> + }
> +
> + ret = request_threaded_irq(max77686->irq, NULL, max77686_irq_thread,
> + IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
> + "max77686-irq", max77686);
> + if (ret) {
> + dev_err(max77686->dev, "Failed to request IRQ %d: %d\n",
> + max77686->irq, ret);
> + return ret;
> + }
> +
> + dbg_info("%s : done\n", __func__);
> +
> + return 0;
> +}
> +
> +void max77686_irq_exit(struct max77686_dev *max77686)
> +{
> + if (max77686->irq)
> + free_irq(max77686->irq, max77686);
> +}
> diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
> new file mode 100644
> index 0000000..e36fb9b
> --- /dev/null
> +++ b/drivers/mfd/max77686.c
> @@ -0,0 +1,322 @@
> +/*
> + * max77686.c - mfd core driver for the Maxim 77686
> + *
> + * Copyright (C) 2012 Samsung Electronics Co.Ltd.
> + * Chiwoong Byun <woong.byun@...sung.com>
> + * Yadwinder Singh Brar <yadi.brar@...sung.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; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> + *
> + * This driver is based on max8997.c
> + */
> +
> +#include <linux/module.h>
> +#include <linux/slab.h>
> +#include <linux/i2c.h>
> +#include <linux/interrupt.h>
> +#include <linux/err.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/regmap.h>
> +#include <linux/mutex.h>
> +#include <linux/mfd/core.h>
> +#include <linux/mfd/max77686.h>
> +#include <linux/mfd/max77686-private.h>
> +
> +#define I2C_ADDR_RTC (0x0C >> 1)
> +
> +#ifdef CONFIG_OF
> +static struct of_device_id __devinitdata max77686_pmic_dt_match[] = {
> + {.compatible = "maxim,max77686", .data = 0},
> + {},
> +};
> +#endif
> +
> +static struct mfd_cell max77686_devs[] = {
> + {.name = "max77686-pmic",},
> + {.name = "max77686-rtc",},
> +};
> +
> +struct regmap_config pmic_regmap_config = {
> + .reg_bits = 8,
> + .val_bits = 8,
> + .max_register = MAX77686_REG_32KHZ,
> +};
> +
> +struct regmap_config rtc_regmap_config = {
> + .reg_bits = 8,
> + .val_bits = 8,
> + .max_register = MAX77686_ALARM2_DATE,
> +};
> +
> +int max77686_read_reg(struct i2c_client *i2c, int reg, int *buf)
> +{
> + struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
> +
> + if (i2c == max77686->i2c)
> + return regmap_read(max77686->regmap, reg, buf);
> + else
> + return regmap_read(max77686->rtc_regmap, reg, buf);
> +}
> +EXPORT_SYMBOL_GPL(max77686_read_reg);
> +
> +int max77686_bulk_read(struct i2c_client *i2c, int reg, int count,
> + int *buf)
> +{
> + struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
> +
> + if (i2c == max77686->i2c)
> + return regmap_bulk_read(max77686->regmap, reg, buf, count);
> + else
> + return regmap_bulk_read(max77686->rtc_regmap, reg, buf, count);
> +}
> +EXPORT_SYMBOL_GPL(max77686_bulk_read);
> +
> +int max77686_write_reg(struct i2c_client *i2c, int reg, int buf)
> +{
> + struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
> + if (i2c == max77686->i2c)
> + return regmap_write(max77686->regmap, reg, buf);
> + else
> + return regmap_write(max77686->rtc_regmap, reg, buf);
> +}
> +EXPORT_SYMBOL_GPL(max77686_write_reg);
> +
> +int max77686_bulk_write(struct i2c_client *i2c, int reg, int count,
> + int *buf)
> +{
> + struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
> +
> + if (i2c == max77686->i2c)
> + return regmap_bulk_write(max77686->regmap, reg, buf, count);
> + else
> + return regmap_bulk_write(max77686->rtc_regmap, reg, buf, count);
> +}
> +EXPORT_SYMBOL_GPL(max77686_bulk_write);
> +
> +int max77686_update_reg(struct i2c_client *i2c, int reg, int val, int mask)
> +{
> + struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
> + if (i2c == max77686->i2c)
> + return regmap_update_bits(max77686->regmap, reg, mask, val);
> + else
> + return regmap_update_bits(max77686->rtc_regmap, reg, mask, val);
> +}
> +EXPORT_SYMBOL_GPL(max77686_update_reg);
> +
> +#ifdef CONFIG_OF
> +static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device
> + *dev)
> +{
> + struct max77686_platform_data *pd;
> +
> + pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
> + if (!pd) {
> + dev_err(dev, "could not allocate memory for pdata\n");
> + return ERR_PTR(-ENOMEM);
> + }
> +
> + return pd;
> +}
> +#else
> +static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device
> + *dev)
> +{
> + return 0;
> +}
> +#endif
> +
> +static inline int max77686_i2c_get_driver_data(struct i2c_client *i2c,
> + const struct i2c_device_id *id)
> +{
> +#ifdef CONFIG_OF
> + if (i2c->dev.of_node) {
> + const struct of_device_id *match;
> + match = of_match_node(max77686_pmic_dt_match,
> + i2c->dev.of_node);
> + return (int)match->data;
> + }
> +#endif
> + return (int)id->driver_data;
> +}
> +
> +static int max77686_i2c_probe(struct i2c_client *i2c,
> + const struct i2c_device_id *id)
> +{
> + struct max77686_dev *max77686;
> + struct max77686_platform_data *pdata = i2c->dev.platform_data;
> + int ret = 0;
> + int data;
> +
> + max77686 = devm_kzalloc(&i2c->dev, sizeof(struct max77686_dev),
> + GFP_KERNEL);
> + if (max77686 == NULL) {
> + dev_err(max77686->dev, "could not allocate memory\n");
> + return -ENOMEM;
> + }
> +
> + max77686->dev = &i2c->dev;
> +
> + if (max77686->dev->of_node) {
> + pdata = max77686_i2c_parse_dt_pdata(max77686->dev);
> + if (IS_ERR(pdata)) {
> + dev_err(max77686->dev, "Unable to parse device tree\n");
> + return PTR_ERR(pdata);
> + }
> + }
> +
> + if (!pdata) {
> + dev_err(max77686->dev, "No platform data found\n");
> + return -ENODEV;
> + }
> +
> + i2c_set_clientdata(i2c, max77686);
> + max77686->i2c = i2c;
> + max77686->irq = i2c->irq;
> + max77686->type = max77686_i2c_get_driver_data(i2c, id);
> +
> + max77686->pdata = pdata;
> + max77686->regmap = devm_regmap_init_i2c(max77686->i2c,
> + &pmic_regmap_config);
> + if (IS_ERR(max77686->regmap)) {
> + dev_err(max77686->dev, "Failed to allocate register map: %d\n",
> + ret);
> + return PTR_ERR(max77686->regmap);
> + }
> +
> + max77686->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC);
> + i2c_set_clientdata(max77686->rtc, max77686);
> + max77686->rtc_regmap = devm_regmap_init_i2c(max77686->rtc,
> + &rtc_regmap_config);
> + if (IS_ERR(max77686->rtc_regmap)) {
> + dev_err(max77686->dev, "rtc register mapping failed %d\n", ret);
> + ret = PTR_ERR(max77686->rtc_regmap);
> + goto err_i2c;
> + }
> +
> + ret = max77686_read_reg(i2c, MAX77686_REG_DEVICE_ID, &data);
> + if (ret < 0) {
> + dev_err(max77686->dev, "device not found on this channel\n");
> + goto err_i2c;
> + } else
> + if (data & CHIP_REV)
> + dev_info(max77686->dev, "device found with id:0x%x\n"
> + , data);
> + else {
> + dev_err(max77686->dev, "inappropriate dev id\n");
> + goto err_i2c;
> + }
> +
> + ret = mfd_add_devices(max77686->dev, -1, max77686_devs,
> + ARRAY_SIZE(max77686_devs), NULL, 0);
> +
> + if (ret < 0) {
> + dev_err(max77686->dev, "mfd_add_devices failed\n");
> + goto err_i2c;
> + }
> +
> + ret = max77686_irq_init(max77686);
> + if (ret < 0) {
> + dev_err(max77686->dev, "max77686_irq_init failed\n");
> + goto err_mfd;
> + }
> +
> + pm_runtime_set_active(max77686->dev);
> + device_init_wakeup(max77686->dev, true);
> +
> + return ret;
> +
> + err_mfd:
> + mfd_remove_devices(max77686->dev);
> + err_i2c:
> + i2c_unregister_device(max77686->rtc);
> + return ret;
> +}
> +
> +static int max77686_i2c_remove(struct i2c_client *i2c)
> +{
> + struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
> +
> + device_init_wakeup(max77686->dev, 0);
> + pm_runtime_set_suspended(max77686->dev);
> + max77686_irq_exit(max77686);
> + mfd_remove_devices(max77686->dev);
> + i2c_unregister_device(max77686->rtc);
> + return 0;
> +}
> +
> +static const struct i2c_device_id max77686_i2c_id[] = {
> + {"max77686", 0},
> + {}
> +};
> +
> +MODULE_DEVICE_TABLE(i2c, max77686_i2c_id);
> +
> +static int max77686_suspend(struct device *dev)
> +{
> + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
> + struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
> +
> + if (device_may_wakeup(dev))
> + enable_irq_wake(max77686->irq);
> +
> + return 0;
> +}
> +
> +static int max77686_resume(struct device *dev)
> +{
> + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
> + struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
> +
> + if (device_may_wakeup(dev))
> + disable_irq_wake(max77686->irq);
> +
> + max77686_irq_resume(max77686);
> + return 0;
> +}
> +
> +const struct dev_pm_ops max77686_pm = {
> + .suspend = max77686_suspend,
> + .resume = max77686_resume,
> +};
> +
> +static struct i2c_driver max77686_i2c_driver = {
> + .driver = {
> + .name = "max77686",
> + .owner = THIS_MODULE,
> + .pm = &max77686_pm,
> + .of_match_table = of_match_ptr(max77686_pmic_dt_match),
> + },
> + .probe = max77686_i2c_probe,
> + .remove = max77686_i2c_remove,
> + .id_table = max77686_i2c_id,
> +};
> +
> +static int __init max77686_i2c_init(void)
> +{
> + return i2c_add_driver(&max77686_i2c_driver);
> +}
> +
> +static void __exit max77686_i2c_exit(void)
> +{
> + i2c_del_driver(&max77686_i2c_driver);
> +}
> +
> +subsys_initcall(max77686_i2c_init);
> +module_exit(max77686_i2c_exit);
> +
> +MODULE_DESCRIPTION("MAXIM 77686 multi-function core driver");
> +MODULE_AUTHOR("Chiwoong Byun <woong.byun@...sung.com>");
> +MODULE_AUTHOR("Yadwinder Singh Brar <yadi.brar@...sung.com>");
> +MODULE_LICENSE("GPL");
> diff --git a/include/linux/mfd/max77686-private.h b/include/linux/mfd/max77686-private.h
> new file mode 100644
> index 0000000..7abb331
> --- /dev/null
> +++ b/include/linux/mfd/max77686-private.h
> @@ -0,0 +1,282 @@
> +/*
> + * max77686.h - Voltage regulator driver for the Maxim 77686
> + *
> + * Copyright (C) 2011 Samsung Electrnoics
> + * Chiwoong Byun <woong.byun@...sung.com>
> + * Yadwinder Singh Brar <yadi.brar@...sung.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; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> + */
> +
> +#ifndef __LINUX_MFD_MAX77686_PRIV_H
> +#define __LINUX_MFD_MAX77686_PRIV_H
> +
> +#include <linux/i2c.h>
> +
> +#define MAX77686_REG_INVALID (0xff)
> +#define RAMP_MASK (0xc0)
> +#define CHIP_REV (0x03)
> +
> +enum max77686_pmic_reg {
> + MAX77686_REG_DEVICE_ID = 0x00,
> + MAX77686_REG_INTSRC = 0x01,
> + MAX77686_REG_INT1 = 0x02,
> + MAX77686_REG_INT2 = 0x03,
> +
> + MAX77686_REG_INT1MSK = 0x04,
> + MAX77686_REG_INT2MSK = 0x05,
> +
> + MAX77686_REG_STATUS1 = 0x06,
> + MAX77686_REG_STATUS2 = 0x07,
> +
> + MAX77686_REG_PWRON = 0x08,
> + MAX77686_REG_ONOFF_DELAY = 0x09,
> + MAX77686_REG_MRSTB = 0x0A,
> + /* Reserved: 0x0B-0x0F */
> +
> + MAX77686_REG_BUCK1CTRL = 0x10,
> + MAX77686_REG_BUCK1OUT = 0x11,
> + MAX77686_REG_BUCK2CTRL1 = 0x12,
> + MAX77686_REG_BUCK234FREQ = 0x13,
> + MAX77686_REG_BUCK2DVS1 = 0x14,
> + MAX77686_REG_BUCK2DVS2 = 0x15,
> + MAX77686_REG_BUCK2DVS3 = 0x16,
> + MAX77686_REG_BUCK2DVS4 = 0x17,
> + MAX77686_REG_BUCK2DVS5 = 0x18,
> + MAX77686_REG_BUCK2DVS6 = 0x19,
> + MAX77686_REG_BUCK2DVS7 = 0x1A,
> + MAX77686_REG_BUCK2DVS8 = 0x1B,
> + MAX77686_REG_BUCK3CTRL1 = 0x1C,
> + /* Reserved: 0x1D */
> + MAX77686_REG_BUCK3DVS1 = 0x1E,
> + MAX77686_REG_BUCK3DVS2 = 0x1F,
> + MAX77686_REG_BUCK3DVS3 = 0x20,
> + MAX77686_REG_BUCK3DVS4 = 0x21,
> + MAX77686_REG_BUCK3DVS5 = 0x22,
> + MAX77686_REG_BUCK3DVS6 = 0x23,
> + MAX77686_REG_BUCK3DVS7 = 0x24,
> + MAX77686_REG_BUCK3DVS8 = 0x25,
> + MAX77686_REG_BUCK4CTRL1 = 0x26,
> + /* Reserved: 0x27 */
> + MAX77686_REG_BUCK4DVS1 = 0x28,
> + MAX77686_REG_BUCK4DVS2 = 0x29,
> + MAX77686_REG_BUCK4DVS3 = 0x2A,
> + MAX77686_REG_BUCK4DVS4 = 0x2B,
> + MAX77686_REG_BUCK4DVS5 = 0x2C,
> + MAX77686_REG_BUCK4DVS6 = 0x2D,
> + MAX77686_REG_BUCK4DVS7 = 0x2E,
> + MAX77686_REG_BUCK4DVS8 = 0x2F,
> + MAX77686_REG_BUCK5CTRL = 0x30,
> + MAX77686_REG_BUCK5OUT = 0x31,
> + MAX77686_REG_BUCK6CTRL = 0x32,
> + MAX77686_REG_BUCK6OUT = 0x33,
> + MAX77686_REG_BUCK7CTRL = 0x34,
> + MAX77686_REG_BUCK7OUT = 0x35,
> + MAX77686_REG_BUCK8CTRL = 0x36,
> + MAX77686_REG_BUCK8OUT = 0x37,
> + MAX77686_REG_BUCK9CTRL = 0x38,
> + MAX77686_REG_BUCK9OUT = 0x39,
> + /* Reserved: 0x3A-0x3F */
> +
> + MAX77686_REG_LDO1CTRL1 = 0x40,
> + MAX77686_REG_LDO2CTRL1 = 0x41,
> + MAX77686_REG_LDO3CTRL1 = 0x42,
> + MAX77686_REG_LDO4CTRL1 = 0x43,
> + MAX77686_REG_LDO5CTRL1 = 0x44,
> + MAX77686_REG_LDO6CTRL1 = 0x45,
> + MAX77686_REG_LDO7CTRL1 = 0x46,
> + MAX77686_REG_LDO8CTRL1 = 0x47,
> + MAX77686_REG_LDO9CTRL1 = 0x48,
> + MAX77686_REG_LDO10CTRL1 = 0x49,
> + MAX77686_REG_LDO11CTRL1 = 0x4A,
> + MAX77686_REG_LDO12CTRL1 = 0x4B,
> + MAX77686_REG_LDO13CTRL1 = 0x4C,
> + MAX77686_REG_LDO14CTRL1 = 0x4D,
> + MAX77686_REG_LDO15CTRL1 = 0x4E,
> + MAX77686_REG_LDO16CTRL1 = 0x4F,
> + MAX77686_REG_LDO17CTRL1 = 0x50,
> + MAX77686_REG_LDO18CTRL1 = 0x51,
> + MAX77686_REG_LDO19CTRL1 = 0x52,
> + MAX77686_REG_LDO20CTRL1 = 0x53,
> + MAX77686_REG_LDO21CTRL1 = 0x54,
> + MAX77686_REG_LDO22CTRL1 = 0x55,
> + MAX77686_REG_LDO23CTRL1 = 0x56,
> + MAX77686_REG_LDO24CTRL1 = 0x57,
> + MAX77686_REG_LDO25CTRL1 = 0x58,
> + MAX77686_REG_LDO26CTRL1 = 0x59,
> + /* Reserved: 0x5A-0x5F */
> + MAX77686_REG_LDO1CTRL2 = 0x60,
> + MAX77686_REG_LDO2CTRL2 = 0x61,
> + MAX77686_REG_LDO3CTRL2 = 0x62,
> + MAX77686_REG_LDO4CTRL2 = 0x63,
> + MAX77686_REG_LDO5CTRL2 = 0x64,
> + MAX77686_REG_LDO6CTRL2 = 0x65,
> + MAX77686_REG_LDO7CTRL2 = 0x66,
> + MAX77686_REG_LDO8CTRL2 = 0x67,
> + MAX77686_REG_LDO9CTRL2 = 0x68,
> + MAX77686_REG_LDO10CTRL2 = 0x69,
> + MAX77686_REG_LDO11CTRL2 = 0x6A,
> + MAX77686_REG_LDO12CTRL2 = 0x6B,
> + MAX77686_REG_LDO13CTRL2 = 0x6C,
> + MAX77686_REG_LDO14CTRL2 = 0x6D,
> + MAX77686_REG_LDO15CTRL2 = 0x6E,
> + MAX77686_REG_LDO16CTRL2 = 0x6F,
> + MAX77686_REG_LDO17CTRL2 = 0x70,
> + MAX77686_REG_LDO18CTRL2 = 0x71,
> + MAX77686_REG_LDO19CTRL2 = 0x72,
> + MAX77686_REG_LDO20CTRL2 = 0x73,
> + MAX77686_REG_LDO21CTRL2 = 0x74,
> + MAX77686_REG_LDO22CTRL2 = 0x75,
> + MAX77686_REG_LDO23CTRL2 = 0x76,
> + MAX77686_REG_LDO24CTRL2 = 0x77,
> + MAX77686_REG_LDO25CTRL2 = 0x78,
> + MAX77686_REG_LDO26CTRL2 = 0x79,
> + /* Reserved: 0x7A-0x7D */
> +
> + MAX77686_REG_BBAT_CHG = 0x7E,
> + MAX77686_REG_32KHZ = 0x7F,
> +
> + MAX77686_REG_PMIC_END = 0x80,
> +};
> +
> +enum max77686_rtc_reg {
> + MAX77686_RTC_INT = 0x00,
> + MAX77686_RTC_INTM = 0x01,
> + MAX77686_RTC_CONTROLM = 0x02,
> + MAX77686_RTC_CONTROL = 0x03,
> + MAX77686_RTC_UPDATE0 = 0x04,
> + /* Reserved: 0x5 */
> + MAX77686_WTSR_SMPL_CNTL = 0x06,
> + MAX77686_RTC_SEC = 0x07,
> + MAX77686_RTC_MIN = 0x08,
> + MAX77686_RTC_HOUR = 0x09,
> + MAX77686_RTC_WEEKDAY = 0x0A,
> + MAX77686_RTC_MONTH = 0x0B,
> + MAX77686_RTC_YEAR = 0x0C,
> + MAX77686_RTC_DATE = 0x0D,
> + MAX77686_ALARM1_SEC = 0x0E,
> + MAX77686_ALARM1_MIN = 0x0F,
> + MAX77686_ALARM1_HOUR = 0x10,
> + MAX77686_ALARM1_WEEKDAY = 0x11,
> + MAX77686_ALARM1_MONTH = 0x12,
> + MAX77686_ALARM1_YEAR = 0x13,
> + MAX77686_ALARM1_DATE = 0x14,
> + MAX77686_ALARM2_SEC = 0x15,
> + MAX77686_ALARM2_MIN = 0x16,
> + MAX77686_ALARM2_HOUR = 0x17,
> + MAX77686_ALARM2_WEEKDAY = 0x18,
> + MAX77686_ALARM2_MONTH = 0x19,
> + MAX77686_ALARM2_YEAR = 0x1A,
> + MAX77686_ALARM2_DATE = 0x1B,
> +};
> +
> +#define MAX77686_IRQSRC_PMIC (0)
> +#define MAX77686_IRQSRC_RTC (1 << 0)
> +
> +enum max77686_irq_source {
> + PMIC_INT1 = 0,
> + PMIC_INT2,
> + RTC_INT,
> +
> + MAX77686_IRQ_GROUP_NR,
> +};
> +
> +enum max77686_irq {
> + MAX77686_PMICIRQ_PWRONF = 0,
> + MAX77686_PMICIRQ_PWRONR,
> + MAX77686_PMICIRQ_JIGONBF,
> + MAX77686_PMICIRQ_JIGONBR,
> + MAX77686_PMICIRQ_ACOKBF,
> + MAX77686_PMICIRQ_ACOKBR,
> + MAX77686_PMICIRQ_ONKEY1S,
> + MAX77686_PMICIRQ_MRSTB,
> +
> + MAX77686_PMICIRQ_140C,
> + MAX77686_PMICIRQ_120C,
> +
> + MAX77686_RTCIRQ_RTC60S = 16,
> + MAX77686_RTCIRQ_RTCA1,
> + MAX77686_RTCIRQ_RTCA2,
> + MAX77686_RTCIRQ_SMPL,
> + MAX77686_RTCIRQ_RTC1S,
> + MAX77686_RTCIRQ_WTSR,
> +
> + MAX77686_IRQ_NR,
> +};
> +
> +struct max77686_dev {
> + struct device *dev;
> + struct i2c_client *i2c; /* 0xcc / PMIC, Battery Control, and FLASH */
> + struct i2c_client *rtc; /* slave addr 0x0c */
> + struct regmap *regmap;
> + struct regmap *rtc_regmap;
> + int type;
> + int irq;
> + struct mutex irqlock;
> + int irq_masks_cur[MAX77686_IRQ_GROUP_NR];
> + int irq_masks_cache[MAX77686_IRQ_GROUP_NR];
> + struct irq_domain *irq_domain;
> + struct max77686_platform_data *pdata;
> +};
> +
> +extern int max77686_irq_init(struct max77686_dev *max77686);
> +extern void max77686_irq_exit(struct max77686_dev *max77686);
> +extern int max77686_irq_resume(struct max77686_dev *max77686);
> +
> +extern int max77686_read_reg(struct i2c_client *i2c, int reg, int *dest);
> +extern int max77686_bulk_read(struct i2c_client *i2c, int reg, int count,
> + int *buf);
> +extern int max77686_write_reg(struct i2c_client *i2c, int reg, int value);
> +extern int max77686_bulk_write(struct i2c_client *i2c, int reg, int count,
> + int *buf);
> +extern int max77686_update_reg(struct i2c_client *i2c, int reg, int val,
> + int mask);
> +
> +extern int max77686_debug_mask; /* enables debug prints */
> +
> +enum {
> + MAX77686_DEBUG_INFO = 1 << 0,
> + MAX77686_DEBUG_MASK = 1 << 1,
> + MAX77686_DEBUG_INT = 1 << 2,
> +};
> +
> +#ifndef CONFIG_DEBUG_MAX77686
> +
> +#define dbg_mask(fmt, ...) do { } while (0)
> +#define dbg_info(fmt, ...) do { } while (0)
> +#define dbg_int(fmt, ...) do { } while (0)
> +
> +#else
> +
> +#define dbg_mask(fmt, ...) \
> +do { \
> + if (max77686_debug_mask & MAX77686_DEBUG_MASK) \
> + printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__); \
> +} while (0)
> +
> +#define dbg_info(fmt, ...) \
> +do { \
> + if (max77686_debug_mask & MAX77686_DEBUG_INFO) \
> + printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__); \
> +} while (0)
> +
> +#define dbg_int(fmt, ...) \
> +do { \
> + if (max77686_debug_mask & MAX77686_DEBUG_INT) \
> + printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__); \
> +} while (0)
> +#endif /* DEBUG_MAX77686 */
> +
> +#endif /* __LINUX_MFD_MAX77686_PRIV_H */
> diff --git a/include/linux/mfd/max77686.h b/include/linux/mfd/max77686.h
> new file mode 100644
> index 0000000..104cc82
> --- /dev/null
> +++ b/include/linux/mfd/max77686.h
> @@ -0,0 +1,100 @@
> +/*
> + * max77686.h - Driver for the Maxim 77686
> + *
> + * Copyright (C) 2011 Samsung Electrnoics
> + * Chiwoong Byun <woong.byun@...sung.com>
> + * Yadwinder Singh Brar <yadi.brar@...sung.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; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> + *
> + * This driver is based on max8997.h
> + *
> + * MAX77686 has PMIC, RTC devices.
> + * The devices share the same I2C bus and included in
> + * this mfd driver.
> + */
> +
> +#ifndef __LINUX_MFD_MAX77686_H
> +#define __LINUX_MFD_MAX77686_H
> +
> +#include <linux/regulator/consumer.h>
> +#include <linux/regulator/of_regulator.h>
> +
> +/* MAX77686 regulator IDs */
> +enum max77686_regulators {
> + MAX77686_LDO1 = 0,
> + MAX77686_LDO2,
> + MAX77686_LDO3,
> + MAX77686_LDO4,
> + MAX77686_LDO5,
> + MAX77686_LDO6,
> + MAX77686_LDO7,
> + MAX77686_LDO8,
> + MAX77686_LDO9,
> + MAX77686_LDO10,
> + MAX77686_LDO11,
> + MAX77686_LDO12,
> + MAX77686_LDO13,
> + MAX77686_LDO14,
> + MAX77686_LDO15,
> + MAX77686_LDO16,
> + MAX77686_LDO17,
> + MAX77686_LDO18,
> + MAX77686_LDO19,
> + MAX77686_LDO20,
> + MAX77686_LDO21,
> + MAX77686_LDO22,
> + MAX77686_LDO23,
> + MAX77686_LDO24,
> + MAX77686_LDO25,
> + MAX77686_LDO26,
> + MAX77686_BUCK1,
> + MAX77686_BUCK2,
> + MAX77686_BUCK3,
> + MAX77686_BUCK4,
> + MAX77686_BUCK5,
> + MAX77686_BUCK6,
> + MAX77686_BUCK7,
> + MAX77686_BUCK8,
> + MAX77686_BUCK9,
> + MAX77686_EN32KHZ_AP,
> + MAX77686_EN32KHZ_CP,
> + MAX77686_P32KH,
> +
> + MAX77686_REG_MAX,
> +};
> +
> +enum max77686_ramp_rate {
> + MAX77686_RAMP_RATE_13MV = 1,
> + MAX77686_RAMP_RATE_27MV, /* default */
> + MAX77686_RAMP_RATE_55MV,
> + MAX77686_RAMP_RATE_100MV,
> +};
> +
> +struct max77686_platform_data {
> + bool wakeup;
> + u8 ramp_delay;
> + struct of_regulator_match *regulators;
> + int num_regulators;
> + struct max77686_opmode_data *opmode_data;
> +
> + /*
> + * GPIO-DVS feature is not enabled with the current version of
> + * MAX77686 driver. Buck2/3/4_voltages[0] is used as the default
> + * voltage at probe.
> + */
> +};
> +
> +#endif /* __LINUX_MFD_MAX77686_H */
> --
> 1.7.0.4
>
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