linux/drivers/mfd/da9063-core.c
Adam Thomson 091c611086 mfd: da9063: Fix revision handling to correctly select reg tables
The current implementation performs checking in the i2c_probe()
function of the variant_code but does this immediately after the
containing struct has been initialised as all zero. This means the
check for variant code will always default to using the BB tables
and will never select AD. The variant code is subsequently set
by device_init() and later used by the RTC so really it's a little
fortunate this mismatch works.

This update adds raw I2C read access functionality to read the chip
and variant/revision information (common to all revisions) so that
it can subsequently correctly choose the proper regmap tables for
real initialisation.

Signed-off-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-08-13 07:49:47 +01:00

207 lines
4.8 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* 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
*
*/
#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/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)
{
int ret;
ret = da9063_clear_fault_log(da9063);
if (ret < 0)
dev_err(da9063->dev, "Cannot clear fault log\n");
da9063->flags = 0;
da9063->irq_base = -1;
da9063->chip_irq = irq;
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");