mfd: tps65912: Add new mfd device
The tps65912 chip is a power management IC. It contains the following
components:
- Regulators
- GPIO controller
The core driver is registered as a platform driver, it provides communication
through I2C and SPI interfaces.
Signed-off-by: Margarita Olaya Cabrera <magi@slimlogic.co.uk>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 1e2c9f03..f94036a 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -171,6 +171,28 @@
This driver can also be built as a module. If so, the module
will be called tps6586x.
+config MFD_TPS65912
+ bool "TPS65912 PMIC"
+ depends on GPIOLIB
+
+config MFD_TPS65912_I2C
+ bool "TPS95612 Power Management chip with I2C"
+ select MFD_CORE
+ select MFD_TPS65912
+ depends on I2C=y && GPIOLIB
+ help
+ If you say yes here you get support for the TPS65912 series of
+ PM chips with I2C interface.
+
+config MFD_TPS65912_SPI
+ bool "TPS65912 Power Management chip with SPI"
+ select MFD_CORE
+ select MFD_TPS65912
+ depends on SPI_MASTER && GPIOLIB
+ help
+ If you say yes here you get support for the TPS65912 series of
+ PM chips with SPI interface.
+
config MENELAUS
bool "Texas Instruments TWL92330/Menelaus PM chip"
depends on I2C=y && ARCH_OMAP2
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 0889f53..c9925e5 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -36,6 +36,10 @@
obj-$(CONFIG_TPS6105X) += tps6105x.o
obj-$(CONFIG_TPS65010) += tps65010.o
obj-$(CONFIG_TPS6507X) += tps6507x.o
+tps65912-objs := tps65912-core.o
+obj-$(CONFIG_MFD_TPS65912) += tps65912.o
+obj-$(CONFIG_MFD_TPS65912_I2C) += tps65912-i2c.o
+obj-$(CONFIG_MFD_TPS65912_SPI) += tps65912-spi.o
obj-$(CONFIG_MENELAUS) += menelaus.o
obj-$(CONFIG_TWL4030_CORE) += twl-core.o twl4030-irq.o twl6030-irq.o
diff --git a/drivers/mfd/tps65912-core.c b/drivers/mfd/tps65912-core.c
new file mode 100644
index 0000000..10baf76
--- /dev/null
+++ b/drivers/mfd/tps65912-core.c
@@ -0,0 +1,164 @@
+/*
+ * tps65912-core.c -- TI TPS65912x
+ *
+ * Copyright 2011 Texas Instruments Inc.
+ *
+ * Author: Margarita Olaya Cabrera <magi@slimlogic.co.uk>
+ *
+ * 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 driver is based on wm8350 implementation.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/tps65912.h>
+
+static struct mfd_cell tps65912s[] = {
+ {
+ .name = "tps65912-pmic",
+ },
+};
+
+int tps65912_set_bits(struct tps65912 *tps65912, u8 reg, u8 mask)
+{
+ u8 data;
+ int err;
+
+ mutex_lock(&tps65912->io_mutex);
+
+ err = tps65912->read(tps65912, reg, 1, &data);
+ if (err) {
+ dev_err(tps65912->dev, "Read from reg 0x%x failed\n", reg);
+ goto out;
+ }
+
+ data |= mask;
+ err = tps65912->write(tps65912, reg, 1, &data);
+ if (err)
+ dev_err(tps65912->dev, "Write to reg 0x%x failed\n", reg);
+
+out:
+ mutex_unlock(&tps65912->io_mutex);
+ return err;
+}
+EXPORT_SYMBOL_GPL(tps65912_set_bits);
+
+int tps65912_clear_bits(struct tps65912 *tps65912, u8 reg, u8 mask)
+{
+ u8 data;
+ int err;
+
+ mutex_lock(&tps65912->io_mutex);
+ err = tps65912->read(tps65912, reg, 1, &data);
+ if (err) {
+ dev_err(tps65912->dev, "Read from reg 0x%x failed\n", reg);
+ goto out;
+ }
+
+ data &= ~mask;
+ err = tps65912->write(tps65912, reg, 1, &data);
+ if (err)
+ dev_err(tps65912->dev, "Write to reg 0x%x failed\n", reg);
+
+out:
+ mutex_unlock(&tps65912->io_mutex);
+ return err;
+}
+EXPORT_SYMBOL_GPL(tps65912_clear_bits);
+
+static inline int tps65912_read(struct tps65912 *tps65912, u8 reg)
+{
+ u8 val;
+ int err;
+
+ err = tps65912->read(tps65912, reg, 1, &val);
+ if (err < 0)
+ return err;
+
+ return val;
+}
+
+static inline int tps65912_write(struct tps65912 *tps65912, u8 reg, u8 val)
+{
+ return tps65912->write(tps65912, reg, 1, &val);
+}
+
+int tps65912_reg_read(struct tps65912 *tps65912, u8 reg)
+{
+ int data;
+
+ mutex_lock(&tps65912->io_mutex);
+
+ data = tps65912_read(tps65912, reg);
+ if (data < 0)
+ dev_err(tps65912->dev, "Read from reg 0x%x failed\n", reg);
+
+ mutex_unlock(&tps65912->io_mutex);
+ return data;
+}
+EXPORT_SYMBOL_GPL(tps65912_reg_read);
+
+int tps65912_reg_write(struct tps65912 *tps65912, u8 reg, u8 val)
+{
+ int err;
+
+ mutex_lock(&tps65912->io_mutex);
+
+ err = tps65912_write(tps65912, reg, val);
+ if (err < 0)
+ dev_err(tps65912->dev, "Write for reg 0x%x failed\n", reg);
+
+ mutex_unlock(&tps65912->io_mutex);
+ return err;
+}
+EXPORT_SYMBOL_GPL(tps65912_reg_write);
+
+int tps65912_device_init(struct tps65912 *tps65912)
+{
+ struct tps65912_board *pmic_plat_data = tps65912->dev->platform_data;
+ int ret, dcdc_avs, value;
+
+ mutex_init(&tps65912->io_mutex);
+ dev_set_drvdata(tps65912->dev, tps65912);
+
+ dcdc_avs = (pmic_plat_data->is_dcdc1_avs << 0 |
+ pmic_plat_data->is_dcdc2_avs << 1 |
+ pmic_plat_data->is_dcdc3_avs << 2 |
+ pmic_plat_data->is_dcdc4_avs << 3);
+ if (dcdc_avs) {
+ tps65912->read(tps65912, TPS65912_I2C_SPI_CFG, 1, &value);
+ dcdc_avs |= value;
+ tps65912->write(tps65912, TPS65912_I2C_SPI_CFG, 1, &dcdc_avs);
+ }
+
+ ret = mfd_add_devices(tps65912->dev, -1,
+ tps65912s, ARRAY_SIZE(tps65912s),
+ NULL, 0);
+ if (ret < 0)
+ goto err;
+
+ return ret;
+
+err:
+ mfd_remove_devices(tps65912->dev);
+ kfree(tps65912);
+ return ret;
+}
+
+void tps65912_device_exit(struct tps65912 *tps65912)
+{
+ mfd_remove_devices(tps65912->dev);
+ kfree(tps65912);
+}
+
+MODULE_AUTHOR("Margarita Olaya <magi@slimlogic.co.uk>");
+MODULE_DESCRIPTION("TPS65912x chip family multi-function driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/mfd/tps65912-i2c.c b/drivers/mfd/tps65912-i2c.c
new file mode 100644
index 0000000..9ed123a
--- /dev/null
+++ b/drivers/mfd/tps65912-i2c.c
@@ -0,0 +1,139 @@
+/*
+ * tps65912-i2c.c -- I2C access for TI TPS65912x PMIC
+ *
+ * Copyright 2011 Texas Instruments Inc.
+ *
+ * Author: Margarita Olaya Cabrera <magi@slimlogic.co.uk>
+ *
+ * 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 driver is based on wm8350 implementation.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/i2c.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/tps65912.h>
+
+static int tps65912_i2c_read(struct tps65912 *tps65912, u8 reg,
+ int bytes, void *dest)
+{
+ struct i2c_client *i2c = tps65912->control_data;
+ struct i2c_msg xfer[2];
+ int ret;
+
+ /* Write register */
+ xfer[0].addr = i2c->addr;
+ xfer[0].flags = 0;
+ xfer[0].len = 1;
+ xfer[0].buf = ®
+
+ /* Read data */
+ xfer[1].addr = i2c->addr;
+ xfer[1].flags = I2C_M_RD;
+ xfer[1].len = bytes;
+ xfer[1].buf = dest;
+
+ ret = i2c_transfer(i2c->adapter, xfer, 2);
+ if (ret == 2)
+ ret = 0;
+ else if (ret >= 0)
+ ret = -EIO;
+ return ret;
+}
+
+static int tps65912_i2c_write(struct tps65912 *tps65912, u8 reg,
+ int bytes, void *src)
+{
+ struct i2c_client *i2c = tps65912->control_data;
+ /* we add 1 byte for device register */
+ u8 msg[TPS6591X_MAX_REGISTER + 1];
+ int ret;
+
+ if (bytes > (TPS6591X_MAX_REGISTER + 1))
+ return -EINVAL;
+
+ msg[0] = reg;
+ memcpy(&msg[1], src, bytes);
+
+ ret = i2c_master_send(i2c, msg, bytes + 1);
+ if (ret < 0)
+ return ret;
+ if (ret != bytes + 1)
+ return -EIO;
+
+ return 0;
+}
+
+static int tps65912_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct tps65912 *tps65912;
+
+ tps65912 = kzalloc(sizeof(struct tps65912), GFP_KERNEL);
+ if (tps65912 == NULL)
+ return -ENOMEM;
+
+ i2c_set_clientdata(i2c, tps65912);
+ tps65912->dev = &i2c->dev;
+ tps65912->control_data = i2c;
+ tps65912->read = tps65912_i2c_read;
+ tps65912->write = tps65912_i2c_write;
+
+ return tps65912_device_init(tps65912);
+}
+
+static int tps65912_i2c_remove(struct i2c_client *i2c)
+{
+ struct tps65912 *tps65912 = i2c_get_clientdata(i2c);
+
+ tps65912_device_exit(tps65912);
+
+ return 0;
+}
+
+static const struct i2c_device_id tps65912_i2c_id[] = {
+ {"tps65912", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, tps65912_i2c_id);
+
+static struct i2c_driver tps65912_i2c_driver = {
+ .driver = {
+ .name = "tps65912",
+ .owner = THIS_MODULE,
+ },
+ .probe = tps65912_i2c_probe,
+ .remove = tps65912_i2c_remove,
+ .id_table = tps65912_i2c_id,
+};
+
+static int __init tps65912_i2c_init(void)
+{
+ int ret;
+
+ ret = i2c_add_driver(&tps65912_i2c_driver);
+ if (ret != 0)
+ pr_err("Failed to register TPS65912 I2C driver: %d\n", ret);
+
+ return ret;
+}
+/* init early so consumer devices can complete system boot */
+subsys_initcall(tps65912_i2c_init);
+
+static void __exit tps65912_i2c_exit(void)
+{
+ i2c_del_driver(&tps65912_i2c_driver);
+}
+module_exit(tps65912_i2c_exit);
+
+MODULE_AUTHOR("Margarita Olaya <magi@slimlogic.co.uk>");
+MODULE_DESCRIPTION("TPS6591x chip family multi-function driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/mfd/tps65912-spi.c b/drivers/mfd/tps65912-spi.c
new file mode 100644
index 0000000..6d71e0d
--- /dev/null
+++ b/drivers/mfd/tps65912-spi.c
@@ -0,0 +1,142 @@
+/*
+ * tps65912-spi.c -- SPI access for TI TPS65912x PMIC
+ *
+ * Copyright 2011 Texas Instruments Inc.
+ *
+ * Author: Margarita Olaya Cabrera <magi@slimlogic.co.uk>
+ *
+ * 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 driver is based on wm8350 implementation.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/spi/spi.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/tps65912.h>
+
+static int tps65912_spi_write(struct tps65912 *tps65912, u8 addr,
+ int bytes, void *src)
+{
+ struct spi_device *spi = tps65912->control_data;
+ u8 *data = (u8 *) src;
+ int ret;
+ /* bit 23 is the read/write bit */
+ unsigned long spi_data = 1 << 23 | addr << 15 | *data;
+ struct spi_transfer xfer;
+ struct spi_message msg;
+ u32 tx_buf, rx_buf;
+
+ tx_buf = spi_data;
+ rx_buf = 0;
+
+ xfer.tx_buf = &tx_buf;
+ xfer.rx_buf = NULL;
+ xfer.len = sizeof(unsigned long);
+ xfer.bits_per_word = 24;
+
+ spi_message_init(&msg);
+ spi_message_add_tail(&xfer, &msg);
+
+ ret = spi_sync(spi, &msg);
+ return ret;
+}
+
+static int tps65912_spi_read(struct tps65912 *tps65912, u8 addr,
+ int bytes, void *dest)
+{
+ struct spi_device *spi = tps65912->control_data;
+ /* bit 23 is the read/write bit */
+ unsigned long spi_data = 0 << 23 | addr << 15;
+ struct spi_transfer xfer;
+ struct spi_message msg;
+ int ret;
+ u8 *data = (u8 *) dest;
+ u32 tx_buf, rx_buf;
+
+ tx_buf = spi_data;
+ rx_buf = 0;
+
+ xfer.tx_buf = &tx_buf;
+ xfer.rx_buf = &rx_buf;
+ xfer.len = sizeof(unsigned long);
+ xfer.bits_per_word = 24;
+
+ spi_message_init(&msg);
+ spi_message_add_tail(&xfer, &msg);
+
+ if (spi == NULL)
+ return 0;
+
+ ret = spi_sync(spi, &msg);
+ if (ret == 0)
+ *data = (u8) (rx_buf & 0xFF);
+ return ret;
+}
+
+static int __devinit tps65912_spi_probe(struct spi_device *spi)
+{
+ struct tps65912 *tps65912;
+
+ tps65912 = kzalloc(sizeof(struct tps65912), GFP_KERNEL);
+ if (tps65912 == NULL)
+ return -ENOMEM;
+
+ tps65912->dev = &spi->dev;
+ tps65912->control_data = spi;
+ tps65912->read = tps65912_spi_read;
+ tps65912->write = tps65912_spi_write;
+
+ spi_set_drvdata(spi, tps65912);
+
+ return tps65912_device_init(tps65912);
+}
+
+static int __devexit tps65912_spi_remove(struct spi_device *spi)
+{
+ struct tps65912 *tps65912 = spi_get_drvdata(spi);
+
+ tps65912_device_exit(tps65912);
+
+ return 0;
+}
+
+static struct spi_driver tps65912_spi_driver = {
+ .driver = {
+ .name = "tps65912",
+ .bus = &spi_bus_type,
+ .owner = THIS_MODULE,
+ },
+ .probe = tps65912_spi_probe,
+ .remove = __devexit_p(tps65912_spi_remove),
+};
+
+static int __init tps65912_spi_init(void)
+{
+ int ret;
+
+ ret = spi_register_driver(&tps65912_spi_driver);
+ if (ret != 0)
+ pr_err("Failed to register TPS65912 SPI driver: %d\n", ret);
+
+ return 0;
+}
+/* init early so consumer devices can complete system boot */
+subsys_initcall(tps65912_spi_init);
+
+static void __exit tps65912_spi_exit(void)
+{
+ spi_unregister_driver(&tps65912_spi_driver);
+}
+module_exit(tps65912_spi_exit);
+
+MODULE_AUTHOR("Margarita Olaya <magi@slimlogic.co.uk>");
+MODULE_DESCRIPTION("SPI support for TPS65912 chip family mfd");
+MODULE_LICENSE("GPL");