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linux-next/drivers/mfd/da9063-core.c
Marek Vasut c2ffec5e4b mfd: da9063: Register RTC only on DA9063L 
The DA9063L does not contain RTC block, unlike the full DA9063.
Split the RTC block into separate mfd cell and register it only
on DA9063.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2018-07-04 07:17:02 +01:00

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/*
* da9063-core.c: Device access for Dialog DA9063 modules
*
* Copyright 2012 Dialog Semiconductors Ltd.
* Copyright 2013 Philipp Zabel, Pengutronix
*
* Author: Krystian Garbaciak, Dialog Semiconductor
* Author: Michal Hajduk, Dialog Semiconductor
*
* 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.
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/mutex.h>
#include <linux/mfd/core.h>
#include <linux/regmap.h>
#include <linux/mfd/da9063/core.h>
#include <linux/mfd/da9063/pdata.h>
#include <linux/mfd/da9063/registers.h>
#include <linux/proc_fs.h>
#include <linux/kthread.h>
#include <linux/uaccess.h>
static struct resource da9063_regulators_resources[] = {
{
.name = "LDO_LIM",
.start = DA9063_IRQ_LDO_LIM,
.end = DA9063_IRQ_LDO_LIM,
.flags = IORESOURCE_IRQ,
},
};
static struct resource da9063_rtc_resources[] = {
{
.name = "ALARM",
.start = DA9063_IRQ_ALARM,
.end = DA9063_IRQ_ALARM,
.flags = IORESOURCE_IRQ,
},
{
.name = "TICK",
.start = DA9063_IRQ_TICK,
.end = DA9063_IRQ_TICK,
.flags = IORESOURCE_IRQ,
}
};
static struct resource da9063_onkey_resources[] = {
{
.name = "ONKEY",
.start = DA9063_IRQ_ONKEY,
.end = DA9063_IRQ_ONKEY,
.flags = IORESOURCE_IRQ,
},
};
static struct resource da9063_hwmon_resources[] = {
{
.start = DA9063_IRQ_ADC_RDY,
.end = DA9063_IRQ_ADC_RDY,
.flags = IORESOURCE_IRQ,
},
};
static const struct mfd_cell da9063_common_devs[] = {
{
.name = DA9063_DRVNAME_REGULATORS,
.num_resources = ARRAY_SIZE(da9063_regulators_resources),
.resources = da9063_regulators_resources,
},
{
.name = DA9063_DRVNAME_LEDS,
},
{
.name = DA9063_DRVNAME_WATCHDOG,
.of_compatible = "dlg,da9063-watchdog",
},
{
.name = DA9063_DRVNAME_HWMON,
.num_resources = ARRAY_SIZE(da9063_hwmon_resources),
.resources = da9063_hwmon_resources,
},
{
.name = DA9063_DRVNAME_ONKEY,
.num_resources = ARRAY_SIZE(da9063_onkey_resources),
.resources = da9063_onkey_resources,
.of_compatible = "dlg,da9063-onkey",
},
{
.name = DA9063_DRVNAME_VIBRATION,
},
};
/* Only present on DA9063 , not on DA9063L */
static const struct mfd_cell da9063_devs[] = {
{
.name = DA9063_DRVNAME_RTC,
.num_resources = ARRAY_SIZE(da9063_rtc_resources),
.resources = da9063_rtc_resources,
.of_compatible = "dlg,da9063-rtc",
},
};
static int da9063_clear_fault_log(struct da9063 *da9063)
{
int ret = 0;
int fault_log = 0;
ret = regmap_read(da9063->regmap, DA9063_REG_FAULT_LOG, &fault_log);
if (ret < 0) {
dev_err(da9063->dev, "Cannot read FAULT_LOG.\n");
return -EIO;
}
if (fault_log) {
if (fault_log & DA9063_TWD_ERROR)
dev_dbg(da9063->dev,
"Fault log entry detected: DA9063_TWD_ERROR\n");
if (fault_log & DA9063_POR)
dev_dbg(da9063->dev,
"Fault log entry detected: DA9063_POR\n");
if (fault_log & DA9063_VDD_FAULT)
dev_dbg(da9063->dev,
"Fault log entry detected: DA9063_VDD_FAULT\n");
if (fault_log & DA9063_VDD_START)
dev_dbg(da9063->dev,
"Fault log entry detected: DA9063_VDD_START\n");
if (fault_log & DA9063_TEMP_CRIT)
dev_dbg(da9063->dev,
"Fault log entry detected: DA9063_TEMP_CRIT\n");
if (fault_log & DA9063_KEY_RESET)
dev_dbg(da9063->dev,
"Fault log entry detected: DA9063_KEY_RESET\n");
if (fault_log & DA9063_NSHUTDOWN)
dev_dbg(da9063->dev,
"Fault log entry detected: DA9063_NSHUTDOWN\n");
if (fault_log & DA9063_WAIT_SHUT)
dev_dbg(da9063->dev,
"Fault log entry detected: DA9063_WAIT_SHUT\n");
}
ret = regmap_write(da9063->regmap,
DA9063_REG_FAULT_LOG,
fault_log);
if (ret < 0)
dev_err(da9063->dev,
"Cannot reset FAULT_LOG values %d\n", ret);
return ret;
}
int da9063_device_init(struct da9063 *da9063, unsigned int irq)
{
struct da9063_pdata *pdata = da9063->dev->platform_data;
int model, variant_id, variant_code;
int ret;
ret = da9063_clear_fault_log(da9063);
if (ret < 0)
dev_err(da9063->dev, "Cannot clear fault log\n");
if (pdata) {
da9063->flags = pdata->flags;
da9063->irq_base = pdata->irq_base;
} else {
da9063->flags = 0;
da9063->irq_base = -1;
}
da9063->chip_irq = irq;
if (pdata && pdata->init != NULL) {
ret = pdata->init(da9063);
if (ret != 0) {
dev_err(da9063->dev,
"Platform initialization failed.\n");
return ret;
}
}
ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_ID, &model);
if (ret < 0) {
dev_err(da9063->dev, "Cannot read chip model id.\n");
return -EIO;
}
if (model != PMIC_CHIP_ID_DA9063) {
dev_err(da9063->dev, "Invalid chip model id: 0x%02x\n", model);
return -ENODEV;
}
ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_VARIANT, &variant_id);
if (ret < 0) {
dev_err(da9063->dev, "Cannot read chip variant id.\n");
return -EIO;
}
variant_code = variant_id >> DA9063_CHIP_VARIANT_SHIFT;
dev_info(da9063->dev,
"Device detected (chip-ID: 0x%02X, var-ID: 0x%02X)\n",
model, variant_id);
if (variant_code < PMIC_DA9063_BB && variant_code != PMIC_DA9063_AD) {
dev_err(da9063->dev,
"Cannot support variant code: 0x%02X\n", variant_code);
return -ENODEV;
}
da9063->variant_code = variant_code;
ret = da9063_irq_init(da9063);
if (ret) {
dev_err(da9063->dev, "Cannot initialize interrupts.\n");
return ret;
}
da9063->irq_base = regmap_irq_chip_get_base(da9063->regmap_irq);
ret = devm_mfd_add_devices(da9063->dev, PLATFORM_DEVID_NONE,
da9063_common_devs,
ARRAY_SIZE(da9063_common_devs),
NULL, da9063->irq_base, NULL);
if (ret) {
dev_err(da9063->dev, "Failed to add child devices\n");
return ret;
}
if (da9063->type == PMIC_TYPE_DA9063) {
ret = devm_mfd_add_devices(da9063->dev, PLATFORM_DEVID_NONE,
da9063_devs, ARRAY_SIZE(da9063_devs),
NULL, da9063->irq_base, NULL);
if (ret) {
dev_err(da9063->dev, "Failed to add child devices\n");
return ret;
}
}
return ret;
}
MODULE_DESCRIPTION("PMIC driver for Dialog DA9063");
MODULE_AUTHOR("Krystian Garbaciak");
MODULE_AUTHOR("Michal Hajduk");
MODULE_LICENSE("GPL");
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