mfd: rt5033: Add Richtek RT5033 driver core.
This patch adds a new driver for Richtek RT5033 driver.
RT5033 is a Multifunction device which includes battery charger, fuel gauge,
flash LED current source, LDO and synchronous Buck converter. It is interfaced
to host controller using I2C interface.
Signed-off-by: Beomho Seo <beomho.seo@samsung.com>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
diff --git a/drivers/mfd/rt5033.c b/drivers/mfd/rt5033.c
new file mode 100644
index 0000000..db395a6
--- /dev/null
+++ b/drivers/mfd/rt5033.c
@@ -0,0 +1,142 @@
+/*
+ * MFD core driver for the Richtek RT5033.
+ *
+ * RT5033 comprises multiple sub-devices switcing charger, fuel gauge,
+ * flash LED, current source, LDO and BUCK regulators.
+ *
+ * Copyright (C) 2014 Samsung Electronics, Co., Ltd.
+ * Author: Beomho Seo <beomho.seo@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published bythe Free Software Foundation.
+ */
+
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/of_device.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/rt5033.h>
+#include <linux/mfd/rt5033-private.h>
+
+static const struct regmap_irq rt5033_irqs[] = {
+ { .mask = RT5033_PMIC_IRQ_BUCKOCP, },
+ { .mask = RT5033_PMIC_IRQ_BUCKLV, },
+ { .mask = RT5033_PMIC_IRQ_SAFELDOLV, },
+ { .mask = RT5033_PMIC_IRQ_LDOLV, },
+ { .mask = RT5033_PMIC_IRQ_OT, },
+ { .mask = RT5033_PMIC_IRQ_VDDA_UV, },
+};
+
+static const struct regmap_irq_chip rt5033_irq_chip = {
+ .name = "rt5033",
+ .status_base = RT5033_REG_PMIC_IRQ_STAT,
+ .mask_base = RT5033_REG_PMIC_IRQ_CTRL,
+ .mask_invert = true,
+ .num_regs = 1,
+ .irqs = rt5033_irqs,
+ .num_irqs = ARRAY_SIZE(rt5033_irqs),
+};
+
+static const struct mfd_cell rt5033_devs[] = {
+ { .name = "rt5033-regulator", },
+ {
+ .name = "rt5033-charger",
+ .of_compatible = "richtek,rt5033-charger",
+ }, {
+ .name = "rt5033-battery",
+ .of_compatible = "richtek,rt5033-battery",
+ },
+};
+
+static const struct regmap_config rt5033_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = RT5033_REG_END,
+};
+
+static int rt5033_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct rt5033_dev *rt5033;
+ unsigned int dev_id;
+ int ret;
+
+ rt5033 = devm_kzalloc(&i2c->dev, sizeof(*rt5033), GFP_KERNEL);
+ if (!rt5033)
+ return -ENOMEM;
+
+ i2c_set_clientdata(i2c, rt5033);
+ rt5033->dev = &i2c->dev;
+ rt5033->irq = i2c->irq;
+ rt5033->wakeup = true;
+
+ rt5033->regmap = devm_regmap_init_i2c(i2c, &rt5033_regmap_config);
+ if (IS_ERR(rt5033->regmap)) {
+ dev_err(&i2c->dev, "Failed to allocate register map.\n");
+ return PTR_ERR(rt5033->regmap);
+ }
+
+ ret = regmap_read(rt5033->regmap, RT5033_REG_DEVICE_ID, &dev_id);
+ if (ret) {
+ dev_err(&i2c->dev, "Device not found\n");
+ return -ENODEV;
+ }
+ dev_info(&i2c->dev, "Device found Device ID: %04x\n", dev_id);
+
+ ret = regmap_add_irq_chip(rt5033->regmap, rt5033->irq,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ 0, &rt5033_irq_chip, &rt5033->irq_data);
+ if (ret) {
+ dev_err(&i2c->dev, "Failed to request IRQ %d: %d\n",
+ rt5033->irq, ret);
+ return ret;
+ }
+
+ ret = mfd_add_devices(rt5033->dev, -1, rt5033_devs,
+ ARRAY_SIZE(rt5033_devs), NULL, 0,
+ regmap_irq_get_domain(rt5033->irq_data));
+ if (ret < 0) {
+ dev_err(&i2c->dev, "Failed to add RT5033 child devices.\n");
+ return ret;
+ }
+
+ device_init_wakeup(rt5033->dev, rt5033->wakeup);
+
+ return 0;
+}
+
+static int rt5033_i2c_remove(struct i2c_client *i2c)
+{
+ mfd_remove_devices(&i2c->dev);
+
+ return 0;
+}
+
+static const struct i2c_device_id rt5033_i2c_id[] = {
+ { "rt5033", },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, rt5033_i2c_id);
+
+static const struct of_device_id rt5033_dt_match[] = {
+ { .compatible = "richtek,rt5033", },
+ { }
+};
+
+static struct i2c_driver rt5033_driver = {
+ .driver = {
+ .name = "rt5033",
+ .of_match_table = of_match_ptr(rt5033_dt_match),
+ },
+ .probe = rt5033_i2c_probe,
+ .remove = rt5033_i2c_remove,
+ .id_table = rt5033_i2c_id,
+};
+module_i2c_driver(rt5033_driver);
+
+MODULE_ALIAS("i2c:rt5033");
+MODULE_DESCRIPTION("Richtek RT5033 multi-function core driver");
+MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
+MODULE_LICENSE("GPL");