248 lines
5.9 KiB
C
248 lines
5.9 KiB
C
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/*
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* da9063-core.c: Device access for Dialog DA9063 modules
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*
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* Copyright 2012 Dialog Semiconductors Ltd.
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* Copyright 2013 Philipp Zabel, Pengutronix
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*
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* Author: Krystian Garbaciak, Dialog Semiconductor
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* Author: Michal Hajduk, Dialog Semiconductor
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/device.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/mutex.h>
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#include <linux/mfd/core.h>
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#include <linux/regmap.h>
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#include <linux/mfd/da9063/core.h>
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#include <linux/mfd/da9063/pdata.h>
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#include <linux/mfd/da9063/registers.h>
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#include <linux/proc_fs.h>
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#include <linux/kthread.h>
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#include <linux/uaccess.h>
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static struct resource da9063_regulators_resources[] = {
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{
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.name = "LDO_LIM",
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.start = DA9063_IRQ_LDO_LIM,
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.end = DA9063_IRQ_LDO_LIM,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct resource da9063_rtc_resources[] = {
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{
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.name = "ALARM",
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.start = DA9063_IRQ_ALARM,
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.end = DA9063_IRQ_ALARM,
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.flags = IORESOURCE_IRQ,
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},
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{
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.name = "TICK",
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.start = DA9063_IRQ_TICK,
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.end = DA9063_IRQ_TICK,
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.flags = IORESOURCE_IRQ,
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}
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};
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static struct resource da9063_onkey_resources[] = {
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{
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.name = "ONKEY",
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.start = DA9063_IRQ_ONKEY,
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.end = DA9063_IRQ_ONKEY,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct resource da9063_hwmon_resources[] = {
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{
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.start = DA9063_IRQ_ADC_RDY,
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.end = DA9063_IRQ_ADC_RDY,
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.flags = IORESOURCE_IRQ,
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},
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};
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static const struct mfd_cell da9063_devs[] = {
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{
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.name = DA9063_DRVNAME_REGULATORS,
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.num_resources = ARRAY_SIZE(da9063_regulators_resources),
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.resources = da9063_regulators_resources,
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},
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{
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.name = DA9063_DRVNAME_LEDS,
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},
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{
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.name = DA9063_DRVNAME_WATCHDOG,
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.of_compatible = "dlg,da9063-watchdog",
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},
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{
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.name = DA9063_DRVNAME_HWMON,
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.num_resources = ARRAY_SIZE(da9063_hwmon_resources),
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.resources = da9063_hwmon_resources,
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},
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{
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.name = DA9063_DRVNAME_ONKEY,
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.num_resources = ARRAY_SIZE(da9063_onkey_resources),
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.resources = da9063_onkey_resources,
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.of_compatible = "dlg,da9063-onkey",
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},
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{
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.name = DA9063_DRVNAME_RTC,
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.num_resources = ARRAY_SIZE(da9063_rtc_resources),
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.resources = da9063_rtc_resources,
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.of_compatible = "dlg,da9063-rtc",
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},
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{
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.name = DA9063_DRVNAME_VIBRATION,
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},
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};
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static int da9063_clear_fault_log(struct da9063 *da9063)
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{
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int ret = 0;
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int fault_log = 0;
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ret = regmap_read(da9063->regmap, DA9063_REG_FAULT_LOG, &fault_log);
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if (ret < 0) {
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dev_err(da9063->dev, "Cannot read FAULT_LOG.\n");
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return -EIO;
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}
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if (fault_log) {
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if (fault_log & DA9063_TWD_ERROR)
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dev_dbg(da9063->dev,
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"Fault log entry detected: DA9063_TWD_ERROR\n");
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if (fault_log & DA9063_POR)
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dev_dbg(da9063->dev,
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"Fault log entry detected: DA9063_POR\n");
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if (fault_log & DA9063_VDD_FAULT)
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dev_dbg(da9063->dev,
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"Fault log entry detected: DA9063_VDD_FAULT\n");
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if (fault_log & DA9063_VDD_START)
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dev_dbg(da9063->dev,
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"Fault log entry detected: DA9063_VDD_START\n");
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if (fault_log & DA9063_TEMP_CRIT)
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dev_dbg(da9063->dev,
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"Fault log entry detected: DA9063_TEMP_CRIT\n");
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if (fault_log & DA9063_KEY_RESET)
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dev_dbg(da9063->dev,
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"Fault log entry detected: DA9063_KEY_RESET\n");
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if (fault_log & DA9063_NSHUTDOWN)
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dev_dbg(da9063->dev,
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"Fault log entry detected: DA9063_NSHUTDOWN\n");
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if (fault_log & DA9063_WAIT_SHUT)
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dev_dbg(da9063->dev,
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"Fault log entry detected: DA9063_WAIT_SHUT\n");
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}
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ret = regmap_write(da9063->regmap,
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DA9063_REG_FAULT_LOG,
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fault_log);
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if (ret < 0)
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dev_err(da9063->dev,
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"Cannot reset FAULT_LOG values %d\n", ret);
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return ret;
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}
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int da9063_device_init(struct da9063 *da9063, unsigned int irq)
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{
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struct da9063_pdata *pdata = da9063->dev->platform_data;
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int model, variant_id, variant_code;
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int ret;
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ret = da9063_clear_fault_log(da9063);
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if (ret < 0)
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dev_err(da9063->dev, "Cannot clear fault log\n");
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if (pdata) {
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da9063->flags = pdata->flags;
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da9063->irq_base = pdata->irq_base;
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} else {
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da9063->flags = 0;
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da9063->irq_base = -1;
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}
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da9063->chip_irq = irq;
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if (pdata && pdata->init != NULL) {
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ret = pdata->init(da9063);
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if (ret != 0) {
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dev_err(da9063->dev,
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"Platform initialization failed.\n");
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return ret;
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}
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}
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ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_ID, &model);
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if (ret < 0) {
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dev_err(da9063->dev, "Cannot read chip model id.\n");
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return -EIO;
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}
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if (model != PMIC_DA9063) {
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dev_err(da9063->dev, "Invalid chip model id: 0x%02x\n", model);
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return -ENODEV;
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}
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ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_VARIANT, &variant_id);
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if (ret < 0) {
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dev_err(da9063->dev, "Cannot read chip variant id.\n");
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return -EIO;
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}
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variant_code = variant_id >> DA9063_CHIP_VARIANT_SHIFT;
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dev_info(da9063->dev,
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"Device detected (chip-ID: 0x%02X, var-ID: 0x%02X)\n",
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model, variant_id);
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if (variant_code < PMIC_DA9063_BB && variant_code != PMIC_DA9063_AD) {
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dev_err(da9063->dev,
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"Cannot support variant code: 0x%02X\n", variant_code);
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return -ENODEV;
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}
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da9063->model = model;
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da9063->variant_code = variant_code;
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ret = da9063_irq_init(da9063);
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if (ret) {
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dev_err(da9063->dev, "Cannot initialize interrupts.\n");
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return ret;
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}
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da9063->irq_base = regmap_irq_chip_get_base(da9063->regmap_irq);
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ret = mfd_add_devices(da9063->dev, -1, da9063_devs,
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ARRAY_SIZE(da9063_devs), NULL, da9063->irq_base,
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NULL);
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if (ret)
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dev_err(da9063->dev, "Cannot add MFD cells\n");
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return ret;
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}
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void da9063_device_exit(struct da9063 *da9063)
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{
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mfd_remove_devices(da9063->dev);
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da9063_irq_exit(da9063);
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}
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MODULE_DESCRIPTION("PMIC driver for Dialog DA9063");
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MODULE_AUTHOR("Krystian Garbaciak");
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MODULE_AUTHOR("Michal Hajduk");
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MODULE_LICENSE("GPL");
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