diff options
Diffstat (limited to 'drivers/mfd/da9063-core.c')
| -rw-r--r-- | drivers/mfd/da9063-core.c | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/drivers/mfd/da9063-core.c b/drivers/mfd/da9063-core.c new file mode 100644 index 000000000..df407c3af --- /dev/null +++ b/drivers/mfd/da9063-core.c @@ -0,0 +1,206 @@ +// 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 const struct resource da9063_regulators_resources[] = { + { + .name = "LDO_LIM", + .start = DA9063_IRQ_LDO_LIM, + .end = DA9063_IRQ_LDO_LIM, + .flags = IORESOURCE_IRQ, + }, +}; + +static const 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 const struct resource da9063_onkey_resources[] = { + { + .name = "ONKEY", + .start = DA9063_IRQ_ONKEY, + .end = DA9063_IRQ_ONKEY, + .flags = IORESOURCE_IRQ, + }, +}; + +static const 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"); |