mfd: da9062: Supply core driver
Add MFD core driver support for DA9062
Signed-off-by: Steve Twiss <stwiss.opensource@diasemi.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
diff --git a/drivers/mfd/da9062-core.c b/drivers/mfd/da9062-core.c
new file mode 100644
index 0000000..4cf0643
--- /dev/null
+++ b/drivers/mfd/da9062-core.c
@@ -0,0 +1,512 @@
+/*
+ * Core, IRQ and I2C device driver for DA9062 PMIC
+ * Copyright (C) 2015 Dialog Semiconductor Ltd.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/regmap.h>
+#include <linux/irq.h>
+#include <linux/mfd/core.h>
+#include <linux/i2c.h>
+#include <linux/mfd/da9062/core.h>
+#include <linux/mfd/da9062/registers.h>
+#include <linux/regulator/of_regulator.h>
+
+#define DA9062_REG_EVENT_A_OFFSET 0
+#define DA9062_REG_EVENT_B_OFFSET 1
+#define DA9062_REG_EVENT_C_OFFSET 2
+
+static struct regmap_irq da9062_irqs[] = {
+ /* EVENT A */
+ [DA9062_IRQ_ONKEY] = {
+ .reg_offset = DA9062_REG_EVENT_A_OFFSET,
+ .mask = DA9062AA_M_NONKEY_MASK,
+ },
+ [DA9062_IRQ_ALARM] = {
+ .reg_offset = DA9062_REG_EVENT_A_OFFSET,
+ .mask = DA9062AA_M_ALARM_MASK,
+ },
+ [DA9062_IRQ_TICK] = {
+ .reg_offset = DA9062_REG_EVENT_A_OFFSET,
+ .mask = DA9062AA_M_TICK_MASK,
+ },
+ [DA9062_IRQ_WDG_WARN] = {
+ .reg_offset = DA9062_REG_EVENT_A_OFFSET,
+ .mask = DA9062AA_M_WDG_WARN_MASK,
+ },
+ [DA9062_IRQ_SEQ_RDY] = {
+ .reg_offset = DA9062_REG_EVENT_A_OFFSET,
+ .mask = DA9062AA_M_SEQ_RDY_MASK,
+ },
+ /* EVENT B */
+ [DA9062_IRQ_TEMP] = {
+ .reg_offset = DA9062_REG_EVENT_B_OFFSET,
+ .mask = DA9062AA_M_TEMP_MASK,
+ },
+ [DA9062_IRQ_LDO_LIM] = {
+ .reg_offset = DA9062_REG_EVENT_B_OFFSET,
+ .mask = DA9062AA_M_LDO_LIM_MASK,
+ },
+ [DA9062_IRQ_DVC_RDY] = {
+ .reg_offset = DA9062_REG_EVENT_B_OFFSET,
+ .mask = DA9062AA_M_DVC_RDY_MASK,
+ },
+ [DA9062_IRQ_VDD_WARN] = {
+ .reg_offset = DA9062_REG_EVENT_B_OFFSET,
+ .mask = DA9062AA_M_VDD_WARN_MASK,
+ },
+ /* EVENT C */
+ [DA9062_IRQ_GPI0] = {
+ .reg_offset = DA9062_REG_EVENT_C_OFFSET,
+ .mask = DA9062AA_M_GPI0_MASK,
+ },
+ [DA9062_IRQ_GPI1] = {
+ .reg_offset = DA9062_REG_EVENT_C_OFFSET,
+ .mask = DA9062AA_M_GPI1_MASK,
+ },
+ [DA9062_IRQ_GPI2] = {
+ .reg_offset = DA9062_REG_EVENT_C_OFFSET,
+ .mask = DA9062AA_M_GPI2_MASK,
+ },
+ [DA9062_IRQ_GPI3] = {
+ .reg_offset = DA9062_REG_EVENT_C_OFFSET,
+ .mask = DA9062AA_M_GPI3_MASK,
+ },
+ [DA9062_IRQ_GPI4] = {
+ .reg_offset = DA9062_REG_EVENT_C_OFFSET,
+ .mask = DA9062AA_M_GPI4_MASK,
+ },
+};
+
+static struct regmap_irq_chip da9062_irq_chip = {
+ .name = "da9062-irq",
+ .irqs = da9062_irqs,
+ .num_irqs = DA9062_NUM_IRQ,
+ .num_regs = 3,
+ .status_base = DA9062AA_EVENT_A,
+ .mask_base = DA9062AA_IRQ_MASK_A,
+ .ack_base = DA9062AA_EVENT_A,
+};
+
+static struct resource da9062_core_resources[] = {
+ DEFINE_RES_NAMED(DA9062_IRQ_VDD_WARN, 1, "VDD_WARN", IORESOURCE_IRQ),
+};
+
+static struct resource da9062_regulators_resources[] = {
+ DEFINE_RES_NAMED(DA9062_IRQ_LDO_LIM, 1, "LDO_LIM", IORESOURCE_IRQ),
+};
+
+static struct resource da9062_thermal_resources[] = {
+ DEFINE_RES_NAMED(DA9062_IRQ_TEMP, 1, "THERMAL", IORESOURCE_IRQ),
+};
+
+static struct resource da9062_wdt_resources[] = {
+ DEFINE_RES_NAMED(DA9062_IRQ_WDG_WARN, 1, "WD_WARN", IORESOURCE_IRQ),
+};
+
+static const struct mfd_cell da9062_devs[] = {
+ {
+ .name = "da9062-core",
+ .num_resources = ARRAY_SIZE(da9062_core_resources),
+ .resources = da9062_core_resources,
+ },
+ {
+ .name = "da9062-regulators",
+ .num_resources = ARRAY_SIZE(da9062_regulators_resources),
+ .resources = da9062_regulators_resources,
+ },
+ {
+ .name = "da9062-watchdog",
+ .num_resources = ARRAY_SIZE(da9062_wdt_resources),
+ .resources = da9062_wdt_resources,
+ .of_compatible = "dlg,da9062-wdt",
+ },
+ {
+ .name = "da9062-thermal",
+ .num_resources = ARRAY_SIZE(da9062_thermal_resources),
+ .resources = da9062_thermal_resources,
+ .of_compatible = "dlg,da9062-thermal",
+ },
+};
+
+static int da9062_clear_fault_log(struct da9062 *chip)
+{
+ int ret;
+ int fault_log;
+
+ ret = regmap_read(chip->regmap, DA9062AA_FAULT_LOG, &fault_log);
+ if (ret < 0)
+ return ret;
+
+ if (fault_log) {
+ if (fault_log & DA9062AA_TWD_ERROR_MASK)
+ dev_dbg(chip->dev, "Fault log entry detected: TWD_ERROR\n");
+ if (fault_log & DA9062AA_POR_MASK)
+ dev_dbg(chip->dev, "Fault log entry detected: POR\n");
+ if (fault_log & DA9062AA_VDD_FAULT_MASK)
+ dev_dbg(chip->dev, "Fault log entry detected: VDD_FAULT\n");
+ if (fault_log & DA9062AA_VDD_START_MASK)
+ dev_dbg(chip->dev, "Fault log entry detected: VDD_START\n");
+ if (fault_log & DA9062AA_TEMP_CRIT_MASK)
+ dev_dbg(chip->dev, "Fault log entry detected: TEMP_CRIT\n");
+ if (fault_log & DA9062AA_KEY_RESET_MASK)
+ dev_dbg(chip->dev, "Fault log entry detected: KEY_RESET\n");
+ if (fault_log & DA9062AA_NSHUTDOWN_MASK)
+ dev_dbg(chip->dev, "Fault log entry detected: NSHUTDOWN\n");
+ if (fault_log & DA9062AA_WAIT_SHUT_MASK)
+ dev_dbg(chip->dev, "Fault log entry detected: WAIT_SHUT\n");
+
+ ret = regmap_write(chip->regmap, DA9062AA_FAULT_LOG,
+ fault_log);
+ }
+
+ return ret;
+}
+
+int get_device_type(struct da9062 *chip)
+{
+ int device_id, variant_id, variant_mrc;
+ int ret;
+
+ ret = regmap_read(chip->regmap, DA9062AA_DEVICE_ID, &device_id);
+ if (ret < 0) {
+ dev_err(chip->dev, "Cannot read chip ID.\n");
+ return -EIO;
+ }
+ if (device_id != DA9062_PMIC_DEVICE_ID) {
+ dev_err(chip->dev, "Invalid device ID: 0x%02x\n", device_id);
+ return -ENODEV;
+ }
+
+ ret = regmap_read(chip->regmap, DA9062AA_VARIANT_ID, &variant_id);
+ if (ret < 0) {
+ dev_err(chip->dev, "Cannot read chip variant id.\n");
+ return -EIO;
+ }
+
+ dev_info(chip->dev,
+ "Device detected (device-ID: 0x%02X, var-ID: 0x%02X)\n",
+ device_id, variant_id);
+
+ variant_mrc = (variant_id & DA9062AA_MRC_MASK) >> DA9062AA_MRC_SHIFT;
+
+ if (variant_mrc < DA9062_PMIC_VARIANT_MRC_AA) {
+ dev_err(chip->dev,
+ "Cannot support variant MRC: 0x%02X\n", variant_mrc);
+ return -ENODEV;
+ }
+
+ return ret;
+}
+
+static const struct regmap_range da9062_aa_readable_ranges[] = {
+ {
+ .range_min = DA9062AA_PAGE_CON,
+ .range_max = DA9062AA_STATUS_B,
+ }, {
+ .range_min = DA9062AA_STATUS_D,
+ .range_max = DA9062AA_EVENT_C,
+ }, {
+ .range_min = DA9062AA_IRQ_MASK_A,
+ .range_max = DA9062AA_IRQ_MASK_C,
+ }, {
+ .range_min = DA9062AA_CONTROL_A,
+ .range_max = DA9062AA_GPIO_4,
+ }, {
+ .range_min = DA9062AA_GPIO_WKUP_MODE,
+ .range_max = DA9062AA_BUCK4_CONT,
+ }, {
+ .range_min = DA9062AA_BUCK3_CONT,
+ .range_max = DA9062AA_BUCK3_CONT,
+ }, {
+ .range_min = DA9062AA_LDO1_CONT,
+ .range_max = DA9062AA_LDO4_CONT,
+ }, {
+ .range_min = DA9062AA_DVC_1,
+ .range_max = DA9062AA_DVC_1,
+ }, {
+ .range_min = DA9062AA_COUNT_S,
+ .range_max = DA9062AA_SECOND_D,
+ }, {
+ .range_min = DA9062AA_SEQ,
+ .range_max = DA9062AA_ID_4_3,
+ }, {
+ .range_min = DA9062AA_ID_12_11,
+ .range_max = DA9062AA_ID_16_15,
+ }, {
+ .range_min = DA9062AA_ID_22_21,
+ .range_max = DA9062AA_ID_32_31,
+ }, {
+ .range_min = DA9062AA_SEQ_A,
+ .range_max = DA9062AA_BUCK3_CFG,
+ }, {
+ .range_min = DA9062AA_VBUCK2_A,
+ .range_max = DA9062AA_VBUCK4_A,
+ }, {
+ .range_min = DA9062AA_VBUCK3_A,
+ .range_max = DA9062AA_VBUCK3_A,
+ }, {
+ .range_min = DA9062AA_VLDO1_A,
+ .range_max = DA9062AA_VLDO4_A,
+ }, {
+ .range_min = DA9062AA_VBUCK2_B,
+ .range_max = DA9062AA_VBUCK4_B,
+ }, {
+ .range_min = DA9062AA_VBUCK3_B,
+ .range_max = DA9062AA_VBUCK3_B,
+ }, {
+ .range_min = DA9062AA_VLDO1_B,
+ .range_max = DA9062AA_VLDO4_B,
+ }, {
+ .range_min = DA9062AA_BBAT_CONT,
+ .range_max = DA9062AA_BBAT_CONT,
+ }, {
+ .range_min = DA9062AA_INTERFACE,
+ .range_max = DA9062AA_CONFIG_E,
+ }, {
+ .range_min = DA9062AA_CONFIG_G,
+ .range_max = DA9062AA_CONFIG_K,
+ }, {
+ .range_min = DA9062AA_CONFIG_M,
+ .range_max = DA9062AA_CONFIG_M,
+ }, {
+ .range_min = DA9062AA_TRIM_CLDR,
+ .range_max = DA9062AA_GP_ID_19,
+ }, {
+ .range_min = DA9062AA_DEVICE_ID,
+ .range_max = DA9062AA_CONFIG_ID,
+ },
+};
+
+static const struct regmap_range da9062_aa_writeable_ranges[] = {
+ {
+ .range_min = DA9062AA_PAGE_CON,
+ .range_max = DA9062AA_PAGE_CON,
+ }, {
+ .range_min = DA9062AA_FAULT_LOG,
+ .range_max = DA9062AA_EVENT_C,
+ }, {
+ .range_min = DA9062AA_IRQ_MASK_A,
+ .range_max = DA9062AA_IRQ_MASK_C,
+ }, {
+ .range_min = DA9062AA_CONTROL_A,
+ .range_max = DA9062AA_GPIO_4,
+ }, {
+ .range_min = DA9062AA_GPIO_WKUP_MODE,
+ .range_max = DA9062AA_BUCK4_CONT,
+ }, {
+ .range_min = DA9062AA_BUCK3_CONT,
+ .range_max = DA9062AA_BUCK3_CONT,
+ }, {
+ .range_min = DA9062AA_LDO1_CONT,
+ .range_max = DA9062AA_LDO4_CONT,
+ }, {
+ .range_min = DA9062AA_DVC_1,
+ .range_max = DA9062AA_DVC_1,
+ }, {
+ .range_min = DA9062AA_COUNT_S,
+ .range_max = DA9062AA_ALARM_Y,
+ }, {
+ .range_min = DA9062AA_SEQ,
+ .range_max = DA9062AA_ID_4_3,
+ }, {
+ .range_min = DA9062AA_ID_12_11,
+ .range_max = DA9062AA_ID_16_15,
+ }, {
+ .range_min = DA9062AA_ID_22_21,
+ .range_max = DA9062AA_ID_32_31,
+ }, {
+ .range_min = DA9062AA_SEQ_A,
+ .range_max = DA9062AA_BUCK3_CFG,
+ }, {
+ .range_min = DA9062AA_VBUCK2_A,
+ .range_max = DA9062AA_VBUCK4_A,
+ }, {
+ .range_min = DA9062AA_VBUCK3_A,
+ .range_max = DA9062AA_VBUCK3_A,
+ }, {
+ .range_min = DA9062AA_VLDO1_A,
+ .range_max = DA9062AA_VLDO4_A,
+ }, {
+ .range_min = DA9062AA_VBUCK2_B,
+ .range_max = DA9062AA_VBUCK4_B,
+ }, {
+ .range_min = DA9062AA_VBUCK3_B,
+ .range_max = DA9062AA_VBUCK3_B,
+ }, {
+ .range_min = DA9062AA_VLDO1_B,
+ .range_max = DA9062AA_VLDO4_B,
+ }, {
+ .range_min = DA9062AA_BBAT_CONT,
+ .range_max = DA9062AA_BBAT_CONT,
+ }, {
+ .range_min = DA9062AA_GP_ID_0,
+ .range_max = DA9062AA_GP_ID_19,
+ },
+};
+
+static const struct regmap_range da9062_aa_volatile_ranges[] = {
+ {
+ .range_min = DA9062AA_PAGE_CON,
+ .range_max = DA9062AA_STATUS_B,
+ }, {
+ .range_min = DA9062AA_STATUS_D,
+ .range_max = DA9062AA_EVENT_C,
+ }, {
+ .range_min = DA9062AA_CONTROL_F,
+ .range_max = DA9062AA_CONTROL_F,
+ }, {
+ .range_min = DA9062AA_COUNT_S,
+ .range_max = DA9062AA_SECOND_D,
+ },
+};
+
+static const struct regmap_access_table da9062_aa_readable_table = {
+ .yes_ranges = da9062_aa_readable_ranges,
+ .n_yes_ranges = ARRAY_SIZE(da9062_aa_readable_ranges),
+};
+
+static const struct regmap_access_table da9062_aa_writeable_table = {
+ .yes_ranges = da9062_aa_writeable_ranges,
+ .n_yes_ranges = ARRAY_SIZE(da9062_aa_writeable_ranges),
+};
+
+static const struct regmap_access_table da9062_aa_volatile_table = {
+ .yes_ranges = da9062_aa_volatile_ranges,
+ .n_yes_ranges = ARRAY_SIZE(da9062_aa_volatile_ranges),
+};
+
+static const struct regmap_range_cfg da9062_range_cfg[] = {
+ {
+ .range_min = DA9062AA_PAGE_CON,
+ .range_max = DA9062AA_CONFIG_ID,
+ .selector_reg = DA9062AA_PAGE_CON,
+ .selector_mask = 1 << DA9062_I2C_PAGE_SEL_SHIFT,
+ .selector_shift = DA9062_I2C_PAGE_SEL_SHIFT,
+ .window_start = 0,
+ .window_len = 256,
+ }
+};
+
+static struct regmap_config da9062_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .ranges = da9062_range_cfg,
+ .num_ranges = ARRAY_SIZE(da9062_range_cfg),
+ .max_register = DA9062AA_CONFIG_ID,
+ .cache_type = REGCACHE_RBTREE,
+ .rd_table = &da9062_aa_readable_table,
+ .wr_table = &da9062_aa_writeable_table,
+ .volatile_table = &da9062_aa_volatile_table,
+};
+
+static int da9062_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct da9062 *chip;
+ unsigned int irq_base;
+ int ret;
+
+ chip = devm_kzalloc(&i2c->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ i2c_set_clientdata(i2c, chip);
+ chip->dev = &i2c->dev;
+
+ if (!i2c->irq) {
+ dev_err(chip->dev, "No IRQ configured\n");
+ return -EINVAL;
+ }
+
+ chip->regmap = devm_regmap_init_i2c(i2c, &da9062_regmap_config);
+ if (IS_ERR(chip->regmap)) {
+ ret = PTR_ERR(chip->regmap);
+ dev_err(chip->dev, "Failed to allocate register map: %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = da9062_clear_fault_log(chip);
+ if (ret < 0)
+ dev_warn(chip->dev, "Cannot clear fault log\n");
+
+ ret = get_device_type(chip);
+ if (ret)
+ return ret;
+
+ ret = regmap_add_irq_chip(chip->regmap, i2c->irq,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
+ -1, &da9062_irq_chip,
+ &chip->regmap_irq);
+ if (ret) {
+ dev_err(chip->dev, "Failed to request IRQ %d: %d\n",
+ i2c->irq, ret);
+ return ret;
+ }
+
+ irq_base = regmap_irq_chip_get_base(chip->regmap_irq);
+
+ ret = mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE, da9062_devs,
+ ARRAY_SIZE(da9062_devs), NULL, irq_base,
+ NULL);
+ if (ret) {
+ dev_err(chip->dev, "Cannot register child devices\n");
+ regmap_del_irq_chip(i2c->irq, chip->regmap_irq);
+ return ret;
+ }
+
+ return ret;
+}
+
+static int da9062_i2c_remove(struct i2c_client *i2c)
+{
+ struct da9062 *chip = i2c_get_clientdata(i2c);
+
+ mfd_remove_devices(chip->dev);
+ regmap_del_irq_chip(i2c->irq, chip->regmap_irq);
+
+ return 0;
+}
+
+static const struct i2c_device_id da9062_i2c_id[] = {
+ { "da9062", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, da9062_i2c_id);
+
+static const struct of_device_id da9062_dt_ids[] = {
+ { .compatible = "dlg,da9062", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, da9062_dt_ids);
+
+static struct i2c_driver da9062_i2c_driver = {
+ .driver = {
+ .name = "da9062",
+ .of_match_table = of_match_ptr(da9062_dt_ids),
+ },
+ .probe = da9062_i2c_probe,
+ .remove = da9062_i2c_remove,
+ .id_table = da9062_i2c_id,
+};
+
+module_i2c_driver(da9062_i2c_driver);
+
+MODULE_DESCRIPTION("Core device driver for Dialog DA9062");
+MODULE_AUTHOR("Steve Twiss <stwiss.opensource@diasemi.com>");
+MODULE_LICENSE("GPL");