Initial import

1 files changed, 513 insertions, 0 deletions

diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c
new file mode 100644
index 000000000..4a69afb42
--- /dev/null
+++ b/drivers/mfd/sec-core.c
@@ -0,0 +1,513 @@
+/*
+ * sec-core.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd
+ *              http://www.samsung.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/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/interrupt.h>
+#include <linux/pm_runtime.h>
+#include <linux/mutex.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/samsung/core.h>
+#include <linux/mfd/samsung/irq.h>
+#include <linux/mfd/samsung/s2mpa01.h>
+#include <linux/mfd/samsung/s2mps11.h>
+#include <linux/mfd/samsung/s2mps13.h>
+#include <linux/mfd/samsung/s2mps14.h>
+#include <linux/mfd/samsung/s2mpu02.h>
+#include <linux/mfd/samsung/s5m8763.h>
+#include <linux/mfd/samsung/s5m8767.h>
+#include <linux/regmap.h>
+
+static const struct mfd_cell s5m8751_devs[] = {
+	{
+		.name = "s5m8751-pmic",
+	}, {
+		.name = "s5m-charger",
+	}, {
+		.name = "s5m8751-codec",
+	},
+};
+
+static const struct mfd_cell s5m8763_devs[] = {
+	{
+		.name = "s5m8763-pmic",
+	}, {
+		.name = "s5m-rtc",
+	}, {
+		.name = "s5m-charger",
+	},
+};
+
+static const struct mfd_cell s5m8767_devs[] = {
+	{
+		.name = "s5m8767-pmic",
+	}, {
+		.name = "s5m-rtc",
+	}, {
+		.name = "s5m8767-clk",
+		.of_compatible = "samsung,s5m8767-clk",
+	}
+};
+
+static const struct mfd_cell s2mps11_devs[] = {
+	{
+		.name = "s2mps11-pmic",
+	}, {
+		.name = "s2mps14-rtc",
+	}, {
+		.name = "s2mps11-clk",
+		.of_compatible = "samsung,s2mps11-clk",
+	}
+};
+
+static const struct mfd_cell s2mps13_devs[] = {
+	{ .name = "s2mps13-pmic", },
+	{ .name = "s2mps13-rtc", },
+	{
+		.name = "s2mps13-clk",
+		.of_compatible = "samsung,s2mps13-clk",
+	},
+};
+
+static const struct mfd_cell s2mps14_devs[] = {
+	{
+		.name = "s2mps14-pmic",
+	}, {
+		.name = "s2mps14-rtc",
+	}, {
+		.name = "s2mps14-clk",
+		.of_compatible = "samsung,s2mps14-clk",
+	}
+};
+
+static const struct mfd_cell s2mpa01_devs[] = {
+	{
+		.name = "s2mpa01-pmic",
+	},
+};
+
+static const struct mfd_cell s2mpu02_devs[] = {
+	{ .name = "s2mpu02-pmic", },
+	{ .name = "s2mpu02-rtc", },
+	{
+		.name = "s2mpu02-clk",
+		.of_compatible = "samsung,s2mpu02-clk",
+	}
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id sec_dt_match[] = {
+	{	.compatible = "samsung,s5m8767-pmic",
+		.data = (void *)S5M8767X,
+	}, {
+		.compatible = "samsung,s2mps11-pmic",
+		.data = (void *)S2MPS11X,
+	}, {
+		.compatible = "samsung,s2mps13-pmic",
+		.data = (void *)S2MPS13X,
+	}, {
+		.compatible = "samsung,s2mps14-pmic",
+		.data = (void *)S2MPS14X,
+	}, {
+		.compatible = "samsung,s2mpa01-pmic",
+		.data = (void *)S2MPA01,
+	}, {
+		.compatible = "samsung,s2mpu02-pmic",
+		.data = (void *)S2MPU02,
+	}, {
+		/* Sentinel */
+	},
+};
+#endif
+
+static bool s2mpa01_volatile(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case S2MPA01_REG_INT1M:
+	case S2MPA01_REG_INT2M:
+	case S2MPA01_REG_INT3M:
+		return false;
+	default:
+		return true;
+	}
+}
+
+static bool s2mps11_volatile(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case S2MPS11_REG_INT1M:
+	case S2MPS11_REG_INT2M:
+	case S2MPS11_REG_INT3M:
+		return false;
+	default:
+		return true;
+	}
+}
+
+static bool s2mpu02_volatile(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case S2MPU02_REG_INT1M:
+	case S2MPU02_REG_INT2M:
+	case S2MPU02_REG_INT3M:
+		return false;
+	default:
+		return true;
+	}
+}
+
+static bool s5m8763_volatile(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case S5M8763_REG_IRQM1:
+	case S5M8763_REG_IRQM2:
+	case S5M8763_REG_IRQM3:
+	case S5M8763_REG_IRQM4:
+		return false;
+	default:
+		return true;
+	}
+}
+
+static const struct regmap_config sec_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+};
+
+static const struct regmap_config s2mpa01_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.max_register = S2MPA01_REG_LDO_OVCB4,
+	.volatile_reg = s2mpa01_volatile,
+	.cache_type = REGCACHE_FLAT,
+};
+
+static const struct regmap_config s2mps11_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.max_register = S2MPS11_REG_L38CTRL,
+	.volatile_reg = s2mps11_volatile,
+	.cache_type = REGCACHE_FLAT,
+};
+
+static const struct regmap_config s2mps13_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.max_register = S2MPS13_REG_LDODSCH5,
+	.volatile_reg = s2mps11_volatile,
+	.cache_type = REGCACHE_FLAT,
+};
+
+static const struct regmap_config s2mps14_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.max_register = S2MPS14_REG_LDODSCH3,
+	.volatile_reg = s2mps11_volatile,
+	.cache_type = REGCACHE_FLAT,
+};
+
+static const struct regmap_config s2mpu02_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.max_register = S2MPU02_REG_DVSDATA,
+	.volatile_reg = s2mpu02_volatile,
+	.cache_type = REGCACHE_FLAT,
+};
+
+static const struct regmap_config s5m8763_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.max_register = S5M8763_REG_LBCNFG2,
+	.volatile_reg = s5m8763_volatile,
+	.cache_type = REGCACHE_FLAT,
+};
+
+static const struct regmap_config s5m8767_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.max_register = S5M8767_REG_LDO28CTRL,
+	.volatile_reg = s2mps11_volatile,
+	.cache_type = REGCACHE_FLAT,
+};
+
+#ifdef CONFIG_OF
+/*
+ * Only the common platform data elements for s5m8767 are parsed here from the
+ * device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and
+ * others have to parse their own platform data elements from device tree.
+ *
+ * The s5m8767 platform data structure is instantiated here and the drivers for
+ * the sub-modules need not instantiate another instance while parsing their
+ * platform data.
+ */
+static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
+					struct device *dev)
+{
+	struct sec_platform_data *pd;
+
+	pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
+	if (!pd)
+		return ERR_PTR(-ENOMEM);
+
+	/*
+	 * ToDo: the 'wakeup' member in the platform data is more of a linux
+	 * specfic information. Hence, there is no binding for that yet and
+	 * not parsed here.
+	 */
+
+	return pd;
+}
+#else
+static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
+					struct device *dev)
+{
+	return NULL;
+}
+#endif
+
+static inline unsigned long sec_i2c_get_driver_data(struct i2c_client *i2c,
+						const struct i2c_device_id *id)
+{
+#ifdef CONFIG_OF
+	if (i2c->dev.of_node) {
+		const struct of_device_id *match;
+
+		match = of_match_node(sec_dt_match, i2c->dev.of_node);
+		return (unsigned long)match->data;
+	}
+#endif
+	return id->driver_data;
+}
+
+static int sec_pmic_probe(struct i2c_client *i2c,
+			    const struct i2c_device_id *id)
+{
+	struct sec_platform_data *pdata = dev_get_platdata(&i2c->dev);
+	const struct regmap_config *regmap;
+	const struct mfd_cell *sec_devs;
+	struct sec_pmic_dev *sec_pmic;
+	unsigned long device_type;
+	int ret, num_sec_devs;
+
+	sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev),
+				GFP_KERNEL);
+	if (sec_pmic == NULL)
+		return -ENOMEM;
+
+	i2c_set_clientdata(i2c, sec_pmic);
+	sec_pmic->dev = &i2c->dev;
+	sec_pmic->i2c = i2c;
+	sec_pmic->irq = i2c->irq;
+	device_type = sec_i2c_get_driver_data(i2c, id);
+
+	if (sec_pmic->dev->of_node) {
+		pdata = sec_pmic_i2c_parse_dt_pdata(sec_pmic->dev);
+		if (IS_ERR(pdata)) {
+			ret = PTR_ERR(pdata);
+			return ret;
+		}
+		pdata->device_type = device_type;
+	}
+	if (pdata) {
+		sec_pmic->device_type = pdata->device_type;
+		sec_pmic->irq_base = pdata->irq_base;
+		sec_pmic->wakeup = pdata->wakeup;
+		sec_pmic->pdata = pdata;
+	}
+
+	switch (sec_pmic->device_type) {
+	case S2MPA01:
+		regmap = &s2mpa01_regmap_config;
+		break;
+	case S2MPS11X:
+		regmap = &s2mps11_regmap_config;
+		break;
+	case S2MPS13X:
+		regmap = &s2mps13_regmap_config;
+		break;
+	case S2MPS14X:
+		regmap = &s2mps14_regmap_config;
+		break;
+	case S5M8763X:
+		regmap = &s5m8763_regmap_config;
+		break;
+	case S5M8767X:
+		regmap = &s5m8767_regmap_config;
+		break;
+	case S2MPU02:
+		regmap = &s2mpu02_regmap_config;
+		break;
+	default:
+		regmap = &sec_regmap_config;
+		break;
+	}
+
+	sec_pmic->regmap_pmic = devm_regmap_init_i2c(i2c, regmap);
+	if (IS_ERR(sec_pmic->regmap_pmic)) {
+		ret = PTR_ERR(sec_pmic->regmap_pmic);
+		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
+			ret);
+		return ret;
+	}
+
+	if (pdata && pdata->cfg_pmic_irq)
+		pdata->cfg_pmic_irq();
+
+	sec_irq_init(sec_pmic);
+
+	pm_runtime_set_active(sec_pmic->dev);
+
+	switch (sec_pmic->device_type) {
+	case S5M8751X:
+		sec_devs = s5m8751_devs;
+		num_sec_devs = ARRAY_SIZE(s5m8751_devs);
+		break;
+	case S5M8763X:
+		sec_devs = s5m8763_devs;
+		num_sec_devs = ARRAY_SIZE(s5m8763_devs);
+		break;
+	case S5M8767X:
+		sec_devs = s5m8767_devs;
+		num_sec_devs = ARRAY_SIZE(s5m8767_devs);
+		break;
+	case S2MPA01:
+		sec_devs = s2mpa01_devs;
+		num_sec_devs = ARRAY_SIZE(s2mpa01_devs);
+		break;
+	case S2MPS11X:
+		sec_devs = s2mps11_devs;
+		num_sec_devs = ARRAY_SIZE(s2mps11_devs);
+		break;
+	case S2MPS13X:
+		sec_devs = s2mps13_devs;
+		num_sec_devs = ARRAY_SIZE(s2mps13_devs);
+		break;
+	case S2MPS14X:
+		sec_devs = s2mps14_devs;
+		num_sec_devs = ARRAY_SIZE(s2mps14_devs);
+		break;
+	case S2MPU02:
+		sec_devs = s2mpu02_devs;
+		num_sec_devs = ARRAY_SIZE(s2mpu02_devs);
+		break;
+	default:
+		/* If this happens the probe function is problem */
+		BUG();
+	}
+	ret = mfd_add_devices(sec_pmic->dev, -1, sec_devs, num_sec_devs, NULL,
+			      0, NULL);
+	if (ret)
+		goto err_mfd;
+
+	device_init_wakeup(sec_pmic->dev, sec_pmic->wakeup);
+
+	return ret;
+
+err_mfd:
+	sec_irq_exit(sec_pmic);
+	return ret;
+}
+
+static int sec_pmic_remove(struct i2c_client *i2c)
+{
+	struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
+
+	mfd_remove_devices(sec_pmic->dev);
+	sec_irq_exit(sec_pmic);
+	return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int sec_pmic_suspend(struct device *dev)
+{
+	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+	struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
+
+	if (device_may_wakeup(dev))
+		enable_irq_wake(sec_pmic->irq);
+	/*
+	 * PMIC IRQ must be disabled during suspend for RTC alarm
+	 * to work properly.
+	 * When device is woken up from suspend, an
+	 * interrupt occurs before resuming I2C bus controller.
+	 * The interrupt is handled by regmap_irq_thread which tries
+	 * to read RTC registers. This read fails (I2C is still
+	 * suspended) and RTC Alarm interrupt is disabled.
+	 */
+	disable_irq(sec_pmic->irq);
+
+	return 0;
+}
+
+static int sec_pmic_resume(struct device *dev)
+{
+	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+	struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
+
+	if (device_may_wakeup(dev))
+		disable_irq_wake(sec_pmic->irq);
+	enable_irq(sec_pmic->irq);
+
+	return 0;
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static SIMPLE_DEV_PM_OPS(sec_pmic_pm_ops, sec_pmic_suspend, sec_pmic_resume);
+
+static const struct i2c_device_id sec_pmic_id[] = {
+	{ "sec_pmic", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, sec_pmic_id);
+
+static struct i2c_driver sec_pmic_driver = {
+	.driver = {
+		   .name = "sec_pmic",
+		   .owner = THIS_MODULE,
+		   .pm = &sec_pmic_pm_ops,
+		   .of_match_table = of_match_ptr(sec_dt_match),
+	},
+	.probe = sec_pmic_probe,
+	.remove = sec_pmic_remove,
+	.id_table = sec_pmic_id,
+};
+
+static int __init sec_pmic_init(void)
+{
+	return i2c_add_driver(&sec_pmic_driver);
+}
+
+subsys_initcall(sec_pmic_init);
+
+static void __exit sec_pmic_exit(void)
+{
+	i2c_del_driver(&sec_pmic_driver);
+}
+module_exit(sec_pmic_exit);
+
+MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
+MODULE_DESCRIPTION("Core support for the S5M MFD");
+MODULE_LICENSE("GPL");