mfd: da9063: Add Dialog DA9063 core driver

This is MFD module providing access to registers and interrupts of DA906x
series PMIC. It is used by other functional modules, registered as MFD cells.
Driver uses regmap with paging to access extended register list. Register map
is divided into two pages, where the second page is used during initialisation.

This module provides support to following functional cells:
 - Regulators
 - RTC
 - HWMON
 - OnKey (power key misc input device)
 - Vibration (force-feedback input device)
 - Watchdog
 - LEDs

Signed-off-by: Krystian Garbaciak <krystian.garbaciak@diasemi.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 182 insertions, 0 deletions

diff --git a/drivers/mfd/da9063-i2c.c b/drivers/mfd/da9063-i2c.c
new file mode 100644
index 000000000000..8db5c805c64f
--- /dev/null
+++ b/drivers/mfd/da9063-i2c.c
@@ -0,0 +1,182 @@
+/* da9063-i2c.c: Interrupt support for Dialog DA9063
+ *
+ * Copyright 2012 Dialog Semiconductor Ltd.
+ * Copyright 2013 Philipp Zabel, Pengutronix
+ *
+ * Author: Krystian Garbaciak <krystian.garbaciak@diasemi.com>
+ *
+ *  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/i2c.h>
+#include <linux/regmap.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+
+#include <linux/mfd/core.h>
+#include <linux/mfd/da9063/core.h>
+#include <linux/mfd/da9063/pdata.h>
+#include <linux/mfd/da9063/registers.h>
+
+static const struct regmap_range da9063_readable_ranges[] = {
+	{
+		.range_min = DA9063_REG_PAGE_CON,
+		.range_max = DA9063_REG_SECOND_D,
+	}, {
+		.range_min = DA9063_REG_SEQ,
+		.range_max = DA9063_REG_ID_32_31,
+	}, {
+		.range_min = DA9063_REG_SEQ_A,
+		.range_max = DA9063_REG_AUTO3_LOW,
+	}, {
+		.range_min = DA9063_REG_T_OFFSET,
+		.range_max = DA9063_REG_GP_ID_19,
+	}, {
+		.range_min = DA9063_REG_CHIP_ID,
+		.range_max = DA9063_REG_CHIP_VARIANT,
+	},
+};
+
+static const struct regmap_range da9063_writeable_ranges[] = {
+	{
+		.range_min = DA9063_REG_PAGE_CON,
+		.range_max = DA9063_REG_PAGE_CON,
+	}, {
+		.range_min = DA9063_REG_FAULT_LOG,
+		.range_max = DA9063_REG_VSYS_MON,
+	}, {
+		.range_min = DA9063_REG_COUNT_S,
+		.range_max = DA9063_REG_ALARM_Y,
+	}, {
+		.range_min = DA9063_REG_SEQ,
+		.range_max = DA9063_REG_ID_32_31,
+	}, {
+		.range_min = DA9063_REG_SEQ_A,
+		.range_max = DA9063_REG_AUTO3_LOW,
+	}, {
+		.range_min = DA9063_REG_CONFIG_I,
+		.range_max = DA9063_REG_MON_REG_4,
+	}, {
+		.range_min = DA9063_REG_GP_ID_0,
+		.range_max = DA9063_REG_GP_ID_19,
+	},
+};
+
+static const struct regmap_range da9063_volatile_ranges[] = {
+	{
+		.range_min = DA9063_REG_STATUS_A,
+		.range_max = DA9063_REG_EVENT_D,
+	}, {
+		.range_min = DA9063_REG_CONTROL_F,
+		.range_max = DA9063_REG_CONTROL_F,
+	}, {
+		.range_min = DA9063_REG_ADC_MAN,
+		.range_max = DA9063_REG_ADC_MAN,
+	}, {
+		.range_min = DA9063_REG_ADC_RES_L,
+		.range_max = DA9063_REG_SECOND_D,
+	}, {
+		.range_min = DA9063_REG_MON_REG_5,
+		.range_max = DA9063_REG_MON_REG_6,
+	},
+};
+
+static const struct regmap_access_table da9063_readable_table = {
+	.yes_ranges = da9063_readable_ranges,
+	.n_yes_ranges = ARRAY_SIZE(da9063_readable_ranges),
+};
+
+static const struct regmap_access_table da9063_writeable_table = {
+	.yes_ranges = da9063_writeable_ranges,
+	.n_yes_ranges = ARRAY_SIZE(da9063_writeable_ranges),
+};
+
+static const struct regmap_access_table da9063_volatile_table = {
+	.yes_ranges = da9063_volatile_ranges,
+	.n_yes_ranges = ARRAY_SIZE(da9063_volatile_ranges),
+};
+
+static const struct regmap_range_cfg da9063_range_cfg[] = {
+	{
+		.range_min = DA9063_REG_PAGE_CON,
+		.range_max = DA9063_REG_CHIP_VARIANT,
+		.selector_reg = DA9063_REG_PAGE_CON,
+		.selector_mask = 1 << DA9063_I2C_PAGE_SEL_SHIFT,
+		.selector_shift = DA9063_I2C_PAGE_SEL_SHIFT,
+		.window_start = 0,
+		.window_len = 256,
+	}
+};
+
+static struct regmap_config da9063_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.ranges = da9063_range_cfg,
+	.num_ranges = ARRAY_SIZE(da9063_range_cfg),
+	.max_register = DA9063_REG_CHIP_VARIANT,
+
+	.cache_type = REGCACHE_RBTREE,
+
+	.rd_table = &da9063_readable_table,
+	.wr_table = &da9063_writeable_table,
+	.volatile_table = &da9063_volatile_table,
+};
+
+static int da9063_i2c_probe(struct i2c_client *i2c,
+	const struct i2c_device_id *id)
+{
+	struct da9063 *da9063;
+	int ret;
+
+	da9063 = devm_kzalloc(&i2c->dev, sizeof(struct da9063), GFP_KERNEL);
+	if (da9063 == NULL)
+		return -ENOMEM;
+
+	i2c_set_clientdata(i2c, da9063);
+	da9063->dev = &i2c->dev;
+	da9063->chip_irq = i2c->irq;
+
+	da9063->regmap = devm_regmap_init_i2c(i2c, &da9063_regmap_config);
+	if (IS_ERR(da9063->regmap)) {
+		ret = PTR_ERR(da9063->regmap);
+		dev_err(da9063->dev, "Failed to allocate register map: %d\n",
+			ret);
+		return ret;
+	}
+
+	return da9063_device_init(da9063, i2c->irq);
+}
+
+static int da9063_i2c_remove(struct i2c_client *i2c)
+{
+	struct da9063 *da9063 = i2c_get_clientdata(i2c);
+
+	da9063_device_exit(da9063);
+
+	return 0;
+}
+
+static const struct i2c_device_id da9063_i2c_id[] = {
+	{"da9063", PMIC_DA9063},
+	{},
+};
+MODULE_DEVICE_TABLE(i2c, da9063_i2c_id);
+
+static struct i2c_driver da9063_i2c_driver = {
+	.driver = {
+		.name = "da9063",
+		.owner = THIS_MODULE,
+	},
+	.probe    = da9063_i2c_probe,
+	.remove   = da9063_i2c_remove,
+	.id_table = da9063_i2c_id,
+};
+
+module_i2c_driver(da9063_i2c_driver);