[PATCH 1/4] mfd: enable max8925
Samuel Ortiz
sameo at linux.intel.com
Fri Jan 8 06:45:15 EST 2010
On Fri, Jan 08, 2010 at 05:34:45AM -0500, Haojian Zhuang wrote:
> On Thu, Jan 7, 2010 at 7:01 PM, Samuel Ortiz <sameo at linux.intel.com> wrote:
> > Hi Haojian,
> >
> > On Mon, Dec 21, 2009 at 07:45:27AM -0500, Haojian Zhuang wrote:
> >> From 567add422a0d2214e037c3ed1b424b21776dfe34 Mon Sep 17 00:00:00 2001
> >> From: Haojian Zhuang <haojian.zhuang at marvell.com>
> >> Date: Thu, 17 Dec 2009 12:30:16 -0500
> >> Subject: [PATCH] mfd: enable max8925
> >>
> >> Max8925 is a Power Management IC from Maxim Semiconductor.
> >>
> >> Do basic support on accessing MAX8925.
> > The patch looks quite good to me. I have some minor comments/suggestions
> > though:
> >
> >> obj-$(CONFIG_PMIC_DA903X) += da903x.o
> >> +max8925-objs := max8925-core.o max8925-i2c.o
> >> +obj-$(CONFIG_MFD_MAX8925) += max8925.o
> > No big deal, but it could just be:
> > obj-$(CONFIG_MFD_MAX8925) += max8925-core.o max8925-i2c.o
> >
>
> I prefer to still use this way. If I write it as your way, it will be
> built to max8925-core.ko and max8925-i2c.ko when built as module. I
> just want to make it built as max8925.ko.
>
> Others are updated. Since it impacts the second one, I upload both #1
> and #2 patches.
Many thanks, patchset applied.
Cheers,
Samuel.
> Thanks
> Haojian
> From 02c46ce4005e06ff41127d3edd3ebcadd109967e Mon Sep 17 00:00:00 2001
> From: Haojian Zhuang <haojian.zhuang at marvell.com>
> Date: Tue, 5 Jan 2010 04:13:00 -0500
> Subject: [PATCH] mfd: enable max8925
>
> Max8925 is a Power Management IC from Maxim Semiconductor.
>
> Do basic support on accessing MAX8925.
>
> Signed-off-by: Haojian Zhuang <haojian.zhuang at marvell.com>
> ---
> drivers/mfd/Kconfig | 9 ++
> drivers/mfd/Makefile | 2 +
> drivers/mfd/max8925-core.c | 262 +++++++++++++++++++++++++++++++++++++++++++
> drivers/mfd/max8925-i2c.c | 210 ++++++++++++++++++++++++++++++++++
> include/linux/mfd/max8925.h | 119 +++++++++++++++++++
> 5 files changed, 602 insertions(+), 0 deletions(-)
> create mode 100644 drivers/mfd/max8925-core.c
> create mode 100644 drivers/mfd/max8925-i2c.c
> create mode 100644 include/linux/mfd/max8925.h
>
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 8782978..a57e7ea 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -184,6 +184,15 @@ config PMIC_ADP5520
> individual components like LCD backlight, LEDs, GPIOs and Kepad
> under the corresponding menus.
>
> +config MFD_MAX8925
> + tristate "Maxim Semiconductor MAX8925 PMIC Support"
> + depends on I2C
> + help
> + Say yes here to support for Maxim Semiconductor MAX8925. This is
> + a Power Management IC. This driver provies common support for
> + accessing the device, additional drivers must be enabled in order
> + to use the functionality of the device.
> +
> config MFD_WM8400
> tristate "Support Wolfson Microelectronics WM8400"
> select MFD_CORE
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index ca2f2c4..86b435c 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -47,6 +47,8 @@ endif
> obj-$(CONFIG_UCB1400_CORE) += ucb1400_core.o
>
> obj-$(CONFIG_PMIC_DA903X) += da903x.o
> +max8925-objs := max8925-core.o max8925-i2c.o
> +obj-$(CONFIG_MFD_MAX8925) += max8925.o
>
> obj-$(CONFIG_MFD_PCF50633) += pcf50633-core.o
> obj-$(CONFIG_PCF50633_ADC) += pcf50633-adc.o
> diff --git a/drivers/mfd/max8925-core.c b/drivers/mfd/max8925-core.c
> new file mode 100644
> index 0000000..3e26267
> --- /dev/null
> +++ b/drivers/mfd/max8925-core.c
> @@ -0,0 +1,262 @@
> +/*
> + * Base driver for Maxim MAX8925
> + *
> + * Copyright (C) 2009 Marvell International Ltd.
> + * Haojian Zhuang <haojian.zhuang at marvell.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.
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/i2c.h>
> +#include <linux/interrupt.h>
> +#include <linux/platform_device.h>
> +#include <linux/mfd/core.h>
> +#include <linux/mfd/max8925.h>
> +
> +#define IRQ_MODE_STATUS 0
> +#define IRQ_MODE_MASK 1
> +
> +static int __get_irq_offset(struct max8925_chip *chip, int irq, int mode,
> + int *offset, int *bit)
> +{
> + if (!offset || !bit)
> + return -EINVAL;
> +
> + switch (chip->chip_id) {
> + case MAX8925_GPM:
> + *bit = irq % BITS_PER_BYTE;
> + if (irq < (BITS_PER_BYTE << 1)) { /* irq = [0,15] */
> + *offset = (mode) ? MAX8925_CHG_IRQ1_MASK
> + : MAX8925_CHG_IRQ1;
> + if (irq >= BITS_PER_BYTE)
> + (*offset)++;
> + } else { /* irq = [16,31] */
> + *offset = (mode) ? MAX8925_ON_OFF_IRQ1_MASK
> + : MAX8925_ON_OFF_IRQ1;
> + if (irq >= (BITS_PER_BYTE * 3))
> + (*offset)++;
> + }
> + break;
> + case MAX8925_ADC:
> + *bit = irq % BITS_PER_BYTE;
> + *offset = (mode) ? MAX8925_TSC_IRQ_MASK : MAX8925_TSC_IRQ;
> + break;
> + default:
> + goto out;
> + }
> + return 0;
> +out:
> + dev_err(chip->dev, "Wrong irq #%d is assigned\n", irq);
> + return -EINVAL;
> +}
> +
> +static int __check_irq(int irq)
> +{
> + if ((irq < 0) || (irq >= MAX8925_NUM_IRQ))
> + return -EINVAL;
> + return 0;
> +}
> +
> +int max8925_mask_irq(struct max8925_chip *chip, int irq)
> +{
> + int offset, bit, ret;
> +
> + ret = __get_irq_offset(chip, irq, IRQ_MODE_MASK, &offset, &bit);
> + if (ret < 0)
> + return ret;
> + ret = max8925_set_bits(chip->i2c, offset, 1 << bit, 1 << bit);
> + return ret;
> +}
> +
> +int max8925_unmask_irq(struct max8925_chip *chip, int irq)
> +{
> + int offset, bit, ret;
> +
> + ret = __get_irq_offset(chip, irq, IRQ_MODE_MASK, &offset, &bit);
> + if (ret < 0)
> + return ret;
> + ret = max8925_set_bits(chip->i2c, offset, 1 << bit, 0);
> + return ret;
> +}
> +
> +#define INT_STATUS_NUM (MAX8925_NUM_IRQ / BITS_PER_BYTE)
> +
> +static irqreturn_t max8925_irq_thread(int irq, void *data)
> +{
> + struct max8925_chip *chip = data;
> + unsigned long irq_status[INT_STATUS_NUM];
> + unsigned char status_buf[INT_STATUS_NUM << 1];
> + int i, ret;
> +
> + memset(irq_status, 0, sizeof(unsigned long) * INT_STATUS_NUM);
> +
> + /* all these interrupt status registers are read-only */
> + switch (chip->chip_id) {
> + case MAX8925_GPM:
> + ret = max8925_bulk_read(chip->i2c, MAX8925_CHG_IRQ1,
> + 4, status_buf);
> + if (ret < 0)
> + goto out;
> + ret = max8925_bulk_read(chip->i2c, MAX8925_ON_OFF_IRQ1,
> + 2, &status_buf[4]);
> + if (ret < 0)
> + goto out;
> + ret = max8925_bulk_read(chip->i2c, MAX8925_ON_OFF_IRQ2,
> + 2, &status_buf[6]);
> + if (ret < 0)
> + goto out;
> + /* clear masked interrupt status */
> + status_buf[0] &= (~status_buf[2] & CHG_IRQ1_MASK);
> + irq_status[0] |= status_buf[0];
> + status_buf[1] &= (~status_buf[3] & CHG_IRQ2_MASK);
> + irq_status[0] |= (status_buf[1] << BITS_PER_BYTE);
> + status_buf[4] &= (~status_buf[5] & ON_OFF_IRQ1_MASK);
> + irq_status[0] |= (status_buf[4] << (BITS_PER_BYTE * 2));
> + status_buf[6] &= (~status_buf[7] & ON_OFF_IRQ2_MASK);
> + irq_status[0] |= (status_buf[6] << (BITS_PER_BYTE * 3));
> + break;
> + case MAX8925_ADC:
> + ret = max8925_bulk_read(chip->i2c, MAX8925_TSC_IRQ,
> + 2, status_buf);
> + if (ret < 0)
> + goto out;
> + /* clear masked interrupt status */
> + status_buf[0] &= (~status_buf[1] & TSC_IRQ_MASK);
> + irq_status[0] |= status_buf[0];
> + break;
> + default:
> + goto out;
> + }
> +
> + for_each_bit(i, &irq_status[0], MAX8925_NUM_IRQ) {
> + clear_bit(i, irq_status);
> + dev_dbg(chip->dev, "Servicing IRQ #%d in %s\n", i, chip->name);
> +
> + mutex_lock(&chip->irq_lock);
> + if (chip->irq[i].handler)
> + chip->irq[i].handler(i, chip->irq[i].data);
> + else {
> + max8925_mask_irq(chip, i);
> + dev_err(chip->dev, "Noboday cares IRQ #%d in %s. "
> + "Now mask it.\n", i, chip->name);
> + }
> + mutex_unlock(&chip->irq_lock);
> + }
> +out:
> + return IRQ_HANDLED;
> +}
> +
> +int max8925_request_irq(struct max8925_chip *chip, int irq,
> + irq_handler_t handler, void *data)
> +{
> + if ((__check_irq(irq) < 0) || !handler)
> + return -EINVAL;
> +
> + mutex_lock(&chip->irq_lock);
> + chip->irq[irq].handler = handler;
> + chip->irq[irq].data = data;
> + mutex_unlock(&chip->irq_lock);
> + return 0;
> +}
> +EXPORT_SYMBOL(max8925_request_irq);
> +
> +int max8925_free_irq(struct max8925_chip *chip, int irq)
> +{
> + if (__check_irq(irq) < 0)
> + return -EINVAL;
> +
> + mutex_lock(&chip->irq_lock);
> + chip->irq[irq].handler = NULL;
> + chip->irq[irq].data = NULL;
> + mutex_unlock(&chip->irq_lock);
> + return 0;
> +}
> +EXPORT_SYMBOL(max8925_free_irq);
> +
> +static int __devinit device_gpm_init(struct max8925_chip *chip,
> + struct i2c_client *i2c,
> + struct max8925_platform_data *pdata)
> +{
> + int ret;
> +
> + /* mask all IRQs */
> + ret = max8925_set_bits(i2c, MAX8925_CHG_IRQ1_MASK, 0x7, 0x7);
> + if (ret < 0)
> + goto out;
> + ret = max8925_set_bits(i2c, MAX8925_CHG_IRQ2_MASK, 0xff, 0xff);
> + if (ret < 0)
> + goto out;
> + ret = max8925_set_bits(i2c, MAX8925_ON_OFF_IRQ1_MASK, 0xff, 0xff);
> + if (ret < 0)
> + goto out;
> + ret = max8925_set_bits(i2c, MAX8925_ON_OFF_IRQ2_MASK, 0x3, 0x3);
> + if (ret < 0)
> + goto out;
> +
> + chip->name = "GPM";
> + memset(chip->irq, 0, sizeof(struct max8925_irq) * MAX8925_NUM_IRQ);
> + ret = request_threaded_irq(i2c->irq, NULL, max8925_irq_thread,
> + IRQF_ONESHOT | IRQF_TRIGGER_LOW,
> + "max8925-gpm", chip);
> + if (ret < 0) {
> + dev_err(chip->dev, "Failed to request IRQ #%d.\n", i2c->irq);
> + goto out;
> + }
> + chip->chip_irq = i2c->irq;
> +
> + /* enable hard-reset for ONKEY power-off */
> + max8925_set_bits(i2c, MAX8925_SYSENSEL, 0x80, 0x80);
> +out:
> + return ret;
> +}
> +
> +static int __devinit device_adc_init(struct max8925_chip *chip,
> + struct i2c_client *i2c,
> + struct max8925_platform_data *pdata)
> +{
> + int ret;
> +
> + /* mask all IRQs */
> + ret = max8925_set_bits(i2c, MAX8925_TSC_IRQ_MASK, 3, 3);
> +
> + chip->name = "ADC";
> + memset(chip->irq, 0, sizeof(struct max8925_irq) * MAX8925_NUM_IRQ);
> + ret = request_threaded_irq(i2c->irq, NULL, max8925_irq_thread,
> + IRQF_ONESHOT | IRQF_TRIGGER_LOW,
> + "max8925-adc", chip);
> + if (ret < 0) {
> + dev_err(chip->dev, "Failed to request IRQ #%d.\n", i2c->irq);
> + goto out;
> + }
> + chip->chip_irq = i2c->irq;
> +out:
> + return ret;
> +}
> +
> +int __devinit max8925_device_init(struct max8925_chip *chip,
> + struct max8925_platform_data *pdata)
> +{
> + switch (chip->chip_id) {
> + case MAX8925_GPM:
> + device_gpm_init(chip, chip->i2c, pdata);
> + break;
> + case MAX8925_ADC:
> + device_adc_init(chip, chip->i2c, pdata);
> + break;
> + }
> + return 0;
> +}
> +
> +void max8925_device_exit(struct max8925_chip *chip)
> +{
> + if (chip->chip_irq >= 0)
> + free_irq(chip->chip_irq, chip);
> +}
> +
> +MODULE_DESCRIPTION("PMIC Driver for Maxim MAX8925");
> +MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang at marvell.com");
> +MODULE_LICENSE("GPL");
> diff --git a/drivers/mfd/max8925-i2c.c b/drivers/mfd/max8925-i2c.c
> new file mode 100644
> index 0000000..3104c4f
> --- /dev/null
> +++ b/drivers/mfd/max8925-i2c.c
> @@ -0,0 +1,210 @@
> +/*
> + * I2C driver for Maxim MAX8925
> + *
> + * Copyright (C) 2009 Marvell International Ltd.
> + * Haojian Zhuang <haojian.zhuang at marvell.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.
> + */
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/i2c.h>
> +#include <linux/mfd/max8925.h>
> +
> +static inline int max8925_read_device(struct i2c_client *i2c,
> + int reg, int bytes, void *dest)
> +{
> + unsigned char data;
> + unsigned char *buf;
> + int ret;
> +
> + buf = kzalloc(bytes + 1, GFP_KERNEL);
> + if (!buf)
> + return -ENOMEM;
> +
> + data = (unsigned char)reg;
> + ret = i2c_master_send(i2c, &data, 1);
> + if (ret < 0)
> + return ret;
> +
> + ret = i2c_master_recv(i2c, buf, bytes + 1);
> + if (ret < 0)
> + return ret;
> + memcpy(dest, buf, bytes);
> + return 0;
> +}
> +
> +static inline int max8925_write_device(struct i2c_client *i2c,
> + int reg, int bytes, void *src)
> +{
> + unsigned char buf[bytes + 1];
> + int ret;
> +
> + buf[0] = (unsigned char)reg;
> + memcpy(&buf[1], src, bytes);
> +
> + ret = i2c_master_send(i2c, buf, bytes + 1);
> + if (ret < 0)
> + return ret;
> + return 0;
> +}
> +
> +int max8925_reg_read(struct i2c_client *i2c, int reg)
> +{
> + struct max8925_chip *chip = i2c_get_clientdata(i2c);
> + unsigned char data;
> + int ret;
> +
> + mutex_lock(&chip->io_lock);
> + ret = max8925_read_device(i2c, reg, 1, &data);
> + mutex_unlock(&chip->io_lock);
> +
> + if (ret < 0)
> + return ret;
> + else
> + return (int)data;
> +}
> +EXPORT_SYMBOL(max8925_reg_read);
> +
> +int max8925_reg_write(struct i2c_client *i2c, int reg,
> + unsigned char data)
> +{
> + struct max8925_chip *chip = i2c_get_clientdata(i2c);
> + int ret;
> +
> + mutex_lock(&chip->io_lock);
> + ret = max8925_write_device(i2c, reg, 1, &data);
> + mutex_unlock(&chip->io_lock);
> +
> + return ret;
> +}
> +EXPORT_SYMBOL(max8925_reg_write);
> +
> +int max8925_bulk_read(struct i2c_client *i2c, int reg,
> + int count, unsigned char *buf)
> +{
> + struct max8925_chip *chip = i2c_get_clientdata(i2c);
> + int ret;
> +
> + mutex_lock(&chip->io_lock);
> + ret = max8925_read_device(i2c, reg, count, buf);
> + mutex_unlock(&chip->io_lock);
> +
> + return ret;
> +}
> +EXPORT_SYMBOL(max8925_bulk_read);
> +
> +int max8925_bulk_write(struct i2c_client *i2c, int reg,
> + int count, unsigned char *buf)
> +{
> + struct max8925_chip *chip = i2c_get_clientdata(i2c);
> + int ret;
> +
> + mutex_lock(&chip->io_lock);
> + ret = max8925_write_device(i2c, reg, count, buf);
> + mutex_unlock(&chip->io_lock);
> +
> + return ret;
> +}
> +EXPORT_SYMBOL(max8925_bulk_write);
> +
> +int max8925_set_bits(struct i2c_client *i2c, int reg,
> + unsigned char mask, unsigned char data)
> +{
> + struct max8925_chip *chip = i2c_get_clientdata(i2c);
> + unsigned char value;
> + int ret;
> +
> + mutex_lock(&chip->io_lock);
> + ret = max8925_read_device(i2c, reg, 1, &value);
> + if (ret < 0)
> + goto out;
> + value &= ~mask;
> + value |= data;
> + ret = max8925_write_device(i2c, reg, 1, &value);
> +out:
> + mutex_unlock(&chip->io_lock);
> + return ret;
> +}
> +EXPORT_SYMBOL(max8925_set_bits);
> +
> +
> +static const struct i2c_device_id max8925_id_table[] = {
> + { "max8925", 0 },
> + {}
> +};
> +MODULE_DEVICE_TABLE(i2c, max8925_id_table);
> +
> +static int __devinit max8925_probe(struct i2c_client *client,
> + const struct i2c_device_id *id)
> +{
> + struct max8925_platform_data *pdata = client->dev.platform_data;
> + struct max8925_chip *chip;
> +
> + if (!pdata) {
> + pr_info("%s: platform data is missing\n", __func__);
> + return -EINVAL;
> + }
> + if ((pdata->chip_id <= MAX8925_INVALID)
> + || (pdata->chip_id >= MAX8925_MAX)) {
> + pr_info("#%s: wrong chip identification\n", __func__);
> + return -EINVAL;
> + }
> +
> + chip = kzalloc(sizeof(struct max8925_chip), GFP_KERNEL);
> + if (chip == NULL)
> + return -ENOMEM;
> + chip->i2c = client;
> + chip->chip_id = pdata->chip_id;
> + i2c_set_clientdata(client, chip);
> + chip->dev = &client->dev;
> + mutex_init(&chip->io_lock);
> + dev_set_drvdata(chip->dev, chip);
> + max8925_device_init(chip, pdata);
> +
> + return 0;
> +}
> +
> +static int __devexit max8925_remove(struct i2c_client *client)
> +{
> + struct max8925_chip *chip = i2c_get_clientdata(client);
> +
> + max8925_device_exit(chip);
> + i2c_set_clientdata(client, NULL);
> + kfree(chip);
> + return 0;
> +}
> +
> +static struct i2c_driver max8925_driver = {
> + .driver = {
> + .name = "max8925",
> + .owner = THIS_MODULE,
> + },
> + .probe = max8925_probe,
> + .remove = __devexit_p(max8925_remove),
> + .id_table = max8925_id_table,
> +};
> +
> +static int __init max8925_i2c_init(void)
> +{
> + int ret;
> +
> + ret = i2c_add_driver(&max8925_driver);
> + if (ret != 0)
> + pr_err("Failed to register MAX8925 I2C driver: %d\n", ret);
> + return ret;
> +}
> +subsys_initcall(max8925_i2c_init);
> +
> +static void __exit max8925_i2c_exit(void)
> +{
> + i2c_del_driver(&max8925_driver);
> +}
> +module_exit(max8925_i2c_exit);
> +
> +MODULE_DESCRIPTION("I2C Driver for Maxim 8925");
> +MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang at marvell.com>");
> +MODULE_LICENSE("GPL");
> diff --git a/include/linux/mfd/max8925.h b/include/linux/mfd/max8925.h
> new file mode 100644
> index 0000000..2326246
> --- /dev/null
> +++ b/include/linux/mfd/max8925.h
> @@ -0,0 +1,119 @@
> +/*
> + * Maxim8925 Interface
> + *
> + * Copyright (C) 2009 Marvell International Ltd.
> + * Haojian Zhuang <haojian.zhuang at marvell.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.
> + */
> +
> +#ifndef __LINUX_MFD_MAX8925_H
> +#define __LINUX_MFD_MAX8925_H
> +
> +#include <linux/interrupt.h>
> +
> +/* Charger registers */
> +#define MAX8925_CHG_IRQ1 (0x7e)
> +#define MAX8925_CHG_IRQ2 (0x7f)
> +#define MAX8925_CHG_IRQ1_MASK (0x80)
> +#define MAX8925_CHG_IRQ2_MASK (0x81)
> +
> +/* GPM registers */
> +#define MAX8925_SYSENSEL (0x00)
> +#define MAX8925_ON_OFF_IRQ1 (0x01)
> +#define MAX8925_ON_OFF_IRQ1_MASK (0x02)
> +#define MAX8925_ON_OFF_STAT (0x03)
> +#define MAX8925_ON_OFF_IRQ2 (0x0d)
> +#define MAX8925_ON_OFF_IRQ2_MASK (0x0e)
> +#define MAX8925_RESET_CNFG (0x0f)
> +
> +/* Touch registers */
> +#define MAX8925_TSC_IRQ (0x00)
> +#define MAX8925_TSC_IRQ_MASK (0x01)
> +
> +/* RTC registers */
> +#define MAX8925_RTC_STATUS (0x1a)
> +#define MAX8925_RTC_IRQ (0x1c)
> +#define MAX8925_RTC_IRQ_MASK (0x1d)
> +
> +/* bit definitions */
> +#define CHG_IRQ1_MASK (0x07)
> +#define CHG_IRQ2_MASK (0xff)
> +#define ON_OFF_IRQ1_MASK (0xff)
> +#define ON_OFF_IRQ2_MASK (0x03)
> +#define TSC_IRQ_MASK (0x03)
> +#define RTC_IRQ_MASK (0x0c)
> +
> +#define MAX8925_NUM_IRQ (32)
> +
> +#define MAX8925_NAME_SIZE (32)
> +
> +enum {
> + MAX8925_INVALID = 0,
> + MAX8925_RTC,
> + MAX8925_ADC,
> + MAX8925_GPM, /* general power management */
> + MAX8925_MAX,
> +};
> +
> +#define MAX8925_IRQ_VCHG_OVP (0)
> +#define MAX8925_IRQ_VCHG_F (1)
> +#define MAX8925_IRQ_VCHG_R (2)
> +#define MAX8925_IRQ_VCHG_THM_OK_R (8)
> +#define MAX8925_IRQ_VCHG_THM_OK_F (9)
> +#define MAX8925_IRQ_VCHG_BATTLOW_F (10)
> +#define MAX8925_IRQ_VCHG_BATTLOW_R (11)
> +#define MAX8925_IRQ_VCHG_RST (12)
> +#define MAX8925_IRQ_VCHG_DONE (13)
> +#define MAX8925_IRQ_VCHG_TOPOFF (14)
> +#define MAX8925_IRQ_VCHG_TMR_FAULT (15)
> +#define MAX8925_IRQ_GPM_RSTIN (16)
> +#define MAX8925_IRQ_GPM_MPL (17)
> +#define MAX8925_IRQ_GPM_SW_3SEC (18)
> +#define MAX8925_IRQ_GPM_EXTON_F (19)
> +#define MAX8925_IRQ_GPM_EXTON_R (20)
> +#define MAX8925_IRQ_GPM_SW_1SEC (21)
> +#define MAX8925_IRQ_GPM_SW_F (22)
> +#define MAX8925_IRQ_GPM_SW_R (23)
> +#define MAX8925_IRQ_GPM_SYSCKEN_F (24)
> +#define MAX8925_IRQ_GPM_SYSCKEN_R (25)
> +
> +#define MAX8925_IRQ_TSC_STICK (0)
> +#define MAX8925_IRQ_TSC_NSTICK (1)
> +
> +struct max8925_irq {
> + irq_handler_t handler;
> + void *data;
> +};
> +
> +struct max8925_chip {
> + struct device *dev;
> + struct mutex io_lock;
> + struct mutex irq_lock;
> + struct i2c_client *i2c;
> + struct max8925_irq irq[MAX8925_NUM_IRQ];
> +
> + const char *name;
> + int chip_id;
> + int chip_irq;
> +};
> +
> +struct max8925_platform_data {
> + int chip_id;
> + int chip_irq;
> +};
> +
> +extern int max8925_reg_read(struct i2c_client *, int);
> +extern int max8925_reg_write(struct i2c_client *, int, unsigned char);
> +extern int max8925_bulk_read(struct i2c_client *, int, int, unsigned char *);
> +extern int max8925_bulk_write(struct i2c_client *, int, int, unsigned char *);
> +extern int max8925_set_bits(struct i2c_client *, int, unsigned char,
> + unsigned char);
> +
> +extern int max8925_device_init(struct max8925_chip *,
> + struct max8925_platform_data *);
> +extern void max8925_device_exit(struct max8925_chip *);
> +#endif /* __LINUX_MFD_MAX8925_H */
> +
> --
> 1.5.6.5
>
> From de0217875722a19c9ec07848d1edac155d14ce95 Mon Sep 17 00:00:00 2001
> From: Haojian Zhuang <haojian.zhuang at marvell.com>
> Date: Fri, 8 Jan 2010 12:43:29 -0500
> Subject: [PATCH] mfd: add subdevs in max8925
>
> Add subdevs in MAX8925. MAX8925 includes regulator, backlight and touch
> components.
>
> Signed-off-by: Haojian Zhuang <haojian.zhuang at marvell.com>
> ---
> drivers/mfd/Kconfig | 1 +
> drivers/mfd/max8925-core.c | 142 +++++++++++++++++++++++++++++++++++++++++++
> include/linux/mfd/max8925.h | 96 +++++++++++++++++++++++++++++
> 3 files changed, 239 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index a57e7ea..94e4d5e 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -187,6 +187,7 @@ config PMIC_ADP5520
> config MFD_MAX8925
> tristate "Maxim Semiconductor MAX8925 PMIC Support"
> depends on I2C
> + select MFD_CORE
> help
> Say yes here to support for Maxim Semiconductor MAX8925. This is
> a Power Management IC. This driver provies common support for
> diff --git a/drivers/mfd/max8925-core.c b/drivers/mfd/max8925-core.c
> index 3e26267..f36c494 100644
> --- a/drivers/mfd/max8925-core.c
> +++ b/drivers/mfd/max8925-core.c
> @@ -20,6 +20,109 @@
> #define IRQ_MODE_STATUS 0
> #define IRQ_MODE_MASK 1
>
> +static struct resource backlight_resources[] = {
> + {
> + .name = "max8925-backlight",
> + .start = MAX8925_WLED_MODE_CNTL,
> + .end = MAX8925_WLED_CNTL,
> + .flags = IORESOURCE_IO,
> + },
> +};
> +
> +static struct mfd_cell backlight_devs[] = {
> + {
> + .name = "max8925-backlight",
> + .num_resources = 1,
> + .resources = &backlight_resources[0],
> + .id = -1,
> + },
> +};
> +
> +static struct resource touch_resources[] = {
> + {
> + .name = "max8925-tsc",
> + .start = MAX8925_TSC_IRQ,
> + .end = MAX8925_ADC_RES_END,
> + .flags = IORESOURCE_IO,
> + },
> +};
> +
> +static struct mfd_cell touch_devs[] = {
> + {
> + .name = "max8925-touch",
> + .num_resources = 1,
> + .resources = &touch_resources[0],
> + .id = -1,
> + },
> +};
> +
> +#define MAX8925_REG_RESOURCE(_start, _end) \
> +{ \
> + .start = MAX8925_##_start, \
> + .end = MAX8925_##_end, \
> + .flags = IORESOURCE_IO, \
> +}
> +
> +static struct resource regulator_resources[] = {
> + MAX8925_REG_RESOURCE(SDCTL1, SDCTL1),
> + MAX8925_REG_RESOURCE(SDCTL2, SDCTL2),
> + MAX8925_REG_RESOURCE(SDCTL3, SDCTL3),
> + MAX8925_REG_RESOURCE(LDOCTL1, LDOCTL1),
> + MAX8925_REG_RESOURCE(LDOCTL2, LDOCTL2),
> + MAX8925_REG_RESOURCE(LDOCTL3, LDOCTL3),
> + MAX8925_REG_RESOURCE(LDOCTL4, LDOCTL4),
> + MAX8925_REG_RESOURCE(LDOCTL5, LDOCTL5),
> + MAX8925_REG_RESOURCE(LDOCTL6, LDOCTL6),
> + MAX8925_REG_RESOURCE(LDOCTL7, LDOCTL7),
> + MAX8925_REG_RESOURCE(LDOCTL8, LDOCTL8),
> + MAX8925_REG_RESOURCE(LDOCTL9, LDOCTL9),
> + MAX8925_REG_RESOURCE(LDOCTL10, LDOCTL10),
> + MAX8925_REG_RESOURCE(LDOCTL11, LDOCTL11),
> + MAX8925_REG_RESOURCE(LDOCTL12, LDOCTL12),
> + MAX8925_REG_RESOURCE(LDOCTL13, LDOCTL13),
> + MAX8925_REG_RESOURCE(LDOCTL14, LDOCTL14),
> + MAX8925_REG_RESOURCE(LDOCTL15, LDOCTL15),
> + MAX8925_REG_RESOURCE(LDOCTL16, LDOCTL16),
> + MAX8925_REG_RESOURCE(LDOCTL17, LDOCTL17),
> + MAX8925_REG_RESOURCE(LDOCTL18, LDOCTL18),
> + MAX8925_REG_RESOURCE(LDOCTL19, LDOCTL19),
> + MAX8925_REG_RESOURCE(LDOCTL20, LDOCTL20),
> +};
> +
> +#define MAX8925_REG_DEVS(_id) \
> +{ \
> + .name = "max8925-regulator", \
> + .num_resources = 1, \
> + .resources = ®ulator_resources[MAX8925_ID_##_id], \
> + .id = MAX8925_ID_##_id, \
> +}
> +
> +static struct mfd_cell regulator_devs[] = {
> + MAX8925_REG_DEVS(SD1),
> + MAX8925_REG_DEVS(SD2),
> + MAX8925_REG_DEVS(SD3),
> + MAX8925_REG_DEVS(LDO1),
> + MAX8925_REG_DEVS(LDO2),
> + MAX8925_REG_DEVS(LDO3),
> + MAX8925_REG_DEVS(LDO4),
> + MAX8925_REG_DEVS(LDO5),
> + MAX8925_REG_DEVS(LDO6),
> + MAX8925_REG_DEVS(LDO7),
> + MAX8925_REG_DEVS(LDO8),
> + MAX8925_REG_DEVS(LDO9),
> + MAX8925_REG_DEVS(LDO10),
> + MAX8925_REG_DEVS(LDO11),
> + MAX8925_REG_DEVS(LDO12),
> + MAX8925_REG_DEVS(LDO13),
> + MAX8925_REG_DEVS(LDO14),
> + MAX8925_REG_DEVS(LDO15),
> + MAX8925_REG_DEVS(LDO16),
> + MAX8925_REG_DEVS(LDO17),
> + MAX8925_REG_DEVS(LDO18),
> + MAX8925_REG_DEVS(LDO19),
> + MAX8925_REG_DEVS(LDO20),
> +};
> +
> static int __get_irq_offset(struct max8925_chip *chip, int irq, int mode,
> int *offset, int *bit)
> {
> @@ -210,6 +313,30 @@ static int __devinit device_gpm_init(struct max8925_chip *chip,
>
> /* enable hard-reset for ONKEY power-off */
> max8925_set_bits(i2c, MAX8925_SYSENSEL, 0x80, 0x80);
> +
> + ret = mfd_add_devices(chip->dev, 0, ®ulator_devs[0],
> + ARRAY_SIZE(regulator_devs),
> + ®ulator_resources[0], 0);
> + if (ret < 0) {
> + dev_err(chip->dev, "Failed to add regulator subdev\n");
> + goto out_irq;
> + }
> +
> + if (pdata && pdata->backlight) {
> + ret = mfd_add_devices(chip->dev, 0, &backlight_devs[0],
> + ARRAY_SIZE(backlight_devs),
> + &backlight_resources[0], 0);
> + if (ret < 0) {
> + dev_err(chip->dev, "Failed to add backlight subdev\n");
> + goto out_dev;
> + }
> + }
> + return 0;
> +out_dev:
> + mfd_remove_devices(chip->dev);
> +out_irq:
> + if (chip->chip_irq)
> + free_irq(chip->chip_irq, chip);
> out:
> return ret;
> }
> @@ -233,6 +360,20 @@ static int __devinit device_adc_init(struct max8925_chip *chip,
> goto out;
> }
> chip->chip_irq = i2c->irq;
> +
> + if (pdata && pdata->touch) {
> + ret = mfd_add_devices(chip->dev, 0, &touch_devs[0],
> + ARRAY_SIZE(touch_devs),
> + &touch_resources[0], 0);
> + if (ret < 0) {
> + dev_err(chip->dev, "Failed to add touch subdev\n");
> + goto out_irq;
> + }
> + }
> + return 0;
> +out_irq:
> + if (chip->chip_irq)
> + free_irq(chip->chip_irq, chip);
> out:
> return ret;
> }
> @@ -255,6 +396,7 @@ void max8925_device_exit(struct max8925_chip *chip)
> {
> if (chip->chip_irq >= 0)
> free_irq(chip->chip_irq, chip);
> + mfd_remove_devices(chip->dev);
> }
>
> MODULE_DESCRIPTION("PMIC Driver for Maxim MAX8925");
> diff --git a/include/linux/mfd/max8925.h b/include/linux/mfd/max8925.h
> index 2326246..b72dbe1 100644
> --- a/include/linux/mfd/max8925.h
> +++ b/include/linux/mfd/max8925.h
> @@ -14,6 +14,33 @@
>
> #include <linux/interrupt.h>
>
> +/* Unified sub device IDs for MAX8925 */
> +enum {
> + MAX8925_ID_SD1,
> + MAX8925_ID_SD2,
> + MAX8925_ID_SD3,
> + MAX8925_ID_LDO1,
> + MAX8925_ID_LDO2,
> + MAX8925_ID_LDO3,
> + MAX8925_ID_LDO4,
> + MAX8925_ID_LDO5,
> + MAX8925_ID_LDO6,
> + MAX8925_ID_LDO7,
> + MAX8925_ID_LDO8,
> + MAX8925_ID_LDO9,
> + MAX8925_ID_LDO10,
> + MAX8925_ID_LDO11,
> + MAX8925_ID_LDO12,
> + MAX8925_ID_LDO13,
> + MAX8925_ID_LDO14,
> + MAX8925_ID_LDO15,
> + MAX8925_ID_LDO16,
> + MAX8925_ID_LDO17,
> + MAX8925_ID_LDO18,
> + MAX8925_ID_LDO19,
> + MAX8925_ID_LDO20,
> +};
> +
> /* Charger registers */
> #define MAX8925_CHG_IRQ1 (0x7e)
> #define MAX8925_CHG_IRQ2 (0x7f)
> @@ -32,12 +59,65 @@
> /* Touch registers */
> #define MAX8925_TSC_IRQ (0x00)
> #define MAX8925_TSC_IRQ_MASK (0x01)
> +#define MAX8925_ADC_RES_END (0x6f)
>
> /* RTC registers */
> #define MAX8925_RTC_STATUS (0x1a)
> #define MAX8925_RTC_IRQ (0x1c)
> #define MAX8925_RTC_IRQ_MASK (0x1d)
>
> +/* WLED registers */
> +#define MAX8925_WLED_MODE_CNTL (0x84)
> +#define MAX8925_WLED_CNTL (0x85)
> +
> +/* MAX8925 Registers */
> +#define MAX8925_SDCTL1 (0x04)
> +#define MAX8925_SDCTL2 (0x07)
> +#define MAX8925_SDCTL3 (0x0A)
> +#define MAX8925_SDV1 (0x06)
> +#define MAX8925_SDV2 (0x09)
> +#define MAX8925_SDV3 (0x0C)
> +#define MAX8925_LDOCTL1 (0x18)
> +#define MAX8925_LDOCTL2 (0x1C)
> +#define MAX8925_LDOCTL3 (0x20)
> +#define MAX8925_LDOCTL4 (0x24)
> +#define MAX8925_LDOCTL5 (0x28)
> +#define MAX8925_LDOCTL6 (0x2C)
> +#define MAX8925_LDOCTL7 (0x30)
> +#define MAX8925_LDOCTL8 (0x34)
> +#define MAX8925_LDOCTL9 (0x38)
> +#define MAX8925_LDOCTL10 (0x3C)
> +#define MAX8925_LDOCTL11 (0x40)
> +#define MAX8925_LDOCTL12 (0x44)
> +#define MAX8925_LDOCTL13 (0x48)
> +#define MAX8925_LDOCTL14 (0x4C)
> +#define MAX8925_LDOCTL15 (0x50)
> +#define MAX8925_LDOCTL16 (0x10)
> +#define MAX8925_LDOCTL17 (0x14)
> +#define MAX8925_LDOCTL18 (0x72)
> +#define MAX8925_LDOCTL19 (0x5C)
> +#define MAX8925_LDOCTL20 (0x9C)
> +#define MAX8925_LDOVOUT1 (0x1A)
> +#define MAX8925_LDOVOUT2 (0x1E)
> +#define MAX8925_LDOVOUT3 (0x22)
> +#define MAX8925_LDOVOUT4 (0x26)
> +#define MAX8925_LDOVOUT5 (0x2A)
> +#define MAX8925_LDOVOUT6 (0x2E)
> +#define MAX8925_LDOVOUT7 (0x32)
> +#define MAX8925_LDOVOUT8 (0x36)
> +#define MAX8925_LDOVOUT9 (0x3A)
> +#define MAX8925_LDOVOUT10 (0x3E)
> +#define MAX8925_LDOVOUT11 (0x42)
> +#define MAX8925_LDOVOUT12 (0x46)
> +#define MAX8925_LDOVOUT13 (0x4A)
> +#define MAX8925_LDOVOUT14 (0x4E)
> +#define MAX8925_LDOVOUT15 (0x52)
> +#define MAX8925_LDOVOUT16 (0x12)
> +#define MAX8925_LDOVOUT17 (0x16)
> +#define MAX8925_LDOVOUT18 (0x74)
> +#define MAX8925_LDOVOUT19 (0x5E)
> +#define MAX8925_LDOVOUT20 (0x9E)
> +
> /* bit definitions */
> #define CHG_IRQ1_MASK (0x07)
> #define CHG_IRQ2_MASK (0xff)
> @@ -83,6 +163,8 @@ enum {
> #define MAX8925_IRQ_TSC_STICK (0)
> #define MAX8925_IRQ_TSC_NSTICK (1)
>
> +#define MAX8925_MAX_REGULATOR (23)
> +
> struct max8925_irq {
> irq_handler_t handler;
> void *data;
> @@ -100,7 +182,21 @@ struct max8925_chip {
> int chip_irq;
> };
>
> +struct max8925_backlight_pdata {
> + int lxw_scl; /* 0/1 -- 0.8Ohm/0.4Ohm */
> + int lxw_freq; /* 700KHz ~ 1400KHz */
> + int dual_string; /* 0/1 -- single/dual string */
> +};
> +
> +struct max8925_touch_pdata {
> + unsigned int flags;
> +};
> +
> struct max8925_platform_data {
> + struct max8925_backlight_pdata *backlight;
> + struct max8925_touch_pdata *touch;
> + struct regulator_init_data *regulator[MAX8925_MAX_REGULATOR];
> +
> int chip_id;
> int chip_irq;
> };
> --
> 1.5.6.5
>
--
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