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Subject[PATCH v6 1/3] mfd: Add new mfd device TPS68470
Date
The TPS68470 device is an advanced power management
unit that powers a Compact Camera Module (CCM),
generates clocks for image sensors, drives a dual
LED for Flash and incorporates two LED drivers for
general purpose indicators.

This patch adds support for TPS68470 mfd device.

Signed-off-by: Rajmohan Mani <rajmohan.mani@intel.com>
---
drivers/mfd/Kconfig | 18 ++++++++
drivers/mfd/Makefile | 1 +
drivers/mfd/tps68470.c | 106 +++++++++++++++++++++++++++++++++++++++++++
include/linux/mfd/tps68470.h | 97 +++++++++++++++++++++++++++++++++++++++
4 files changed, 222 insertions(+)
create mode 100644 drivers/mfd/tps68470.c
create mode 100644 include/linux/mfd/tps68470.h

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 94ad2c1..74f41a1 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1337,6 +1337,24 @@ config MFD_TPS65217
This driver can also be built as a module. If so, the module
will be called tps65217.

+config MFD_TPS68470
+ bool "TI TPS68470 Power Management / LED chips"
+ depends on ACPI && I2C=y
+ select MFD_CORE
+ select REGMAP_I2C
+ select I2C_DESIGNWARE_PLATFORM
+ help
+ If you say yes here you get support for the TPS68470 series of
+ Power Management / LED chips.
+
+ These include voltage regulators, LEDs and other features
+ that are often used in portable devices.
+
+ This option is a bool as it provides an ACPI operation
+ region, which must be available before any of the devices
+ using this are probed. This option also configures the
+ designware-i2c driver to be built-in, for the same reason.
+
config MFD_TI_LP873X
tristate "TI LP873X Power Management IC"
depends on I2C
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 080793b..0b1fd82 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -83,6 +83,7 @@ obj-$(CONFIG_MFD_TPS65910) += tps65910.o
obj-$(CONFIG_MFD_TPS65912) += tps65912-core.o
obj-$(CONFIG_MFD_TPS65912_I2C) += tps65912-i2c.o
obj-$(CONFIG_MFD_TPS65912_SPI) += tps65912-spi.o
+obj-$(CONFIG_MFD_TPS68470) += tps68470.o
obj-$(CONFIG_MFD_TPS80031) += tps80031.o
obj-$(CONFIG_MENELAUS) += menelaus.o

diff --git a/drivers/mfd/tps68470.c b/drivers/mfd/tps68470.c
new file mode 100644
index 0000000..189efae
--- /dev/null
+++ b/drivers/mfd/tps68470.c
@@ -0,0 +1,106 @@
+/*
+ * TPS68470 chip Parent driver
+ *
+ * Copyright (C) 2017 Intel Corporation
+ *
+ * Authors:
+ * Rajmohan Mani <rajmohan.mani@intel.com>
+ * Tianshu Qiu <tian.shu.qiu@intel.com>
+ * Jian Xu Zheng <jian.xu.zheng@intel.com>
+ * Yuning Pu <yuning.pu@intel.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 version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/acpi.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/tps68470.h>
+#include <linux/regmap.h>
+
+static const struct mfd_cell tps68470s[] = {
+ { .name = "tps68470-gpio" },
+ { .name = "tps68470_pmic_opregion" },
+};
+
+static const struct regmap_config tps68470_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = TPS68470_REG_MAX,
+};
+
+static int tps68470_chip_init(struct device *dev, struct regmap *regmap)
+{
+ unsigned int version;
+ int ret;
+
+ /* Force software reset */
+ ret = regmap_write(regmap, TPS68470_REG_RESET, TPS68470_REG_RESET_MASK);
+ if (ret)
+ return ret;
+
+ ret = regmap_read(regmap, TPS68470_REG_REVID, &version);
+ if (ret) {
+ dev_err(dev, "Failed to read revision register: %d\n", ret);
+ return ret;
+ }
+
+ dev_info(dev, "TPS68470 REVID: 0x%x\n", version);
+
+ return 0;
+}
+
+static int tps68470_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct regmap *regmap;
+ int ret;
+
+ regmap = devm_regmap_init_i2c(client, &tps68470_regmap_config);
+ if (IS_ERR(regmap)) {
+ dev_err(dev, "devm_regmap_init_i2c Error %ld\n",
+ PTR_ERR(regmap));
+ return PTR_ERR(regmap);
+ }
+
+ i2c_set_clientdata(client, regmap);
+
+ ret = tps68470_chip_init(dev, regmap);
+ if (ret < 0) {
+ dev_err(dev, "TPS68470 Init Error %d\n", ret);
+ return ret;
+ }
+
+ ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, tps68470s,
+ ARRAY_SIZE(tps68470s), NULL, 0, NULL);
+ if (ret < 0) {
+ dev_err(dev, "devm_mfd_add_devices failed: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct acpi_device_id tps68470_acpi_ids[] = {
+ {"INT3472"},
+ {},
+};
+MODULE_DEVICE_TABLE(acpi, tps68470_acpi_ids);
+
+static struct i2c_driver tps68470_driver = {
+ .driver = {
+ .name = "tps68470",
+ .acpi_match_table = tps68470_acpi_ids,
+ },
+ .probe_new = tps68470_probe,
+};
+builtin_i2c_driver(tps68470_driver);
diff --git a/include/linux/mfd/tps68470.h b/include/linux/mfd/tps68470.h
new file mode 100644
index 0000000..44f9d9f
--- /dev/null
+++ b/include/linux/mfd/tps68470.h
@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2017 Intel Corporation
+ *
+ * Functions to access TPS68470 power management chip.
+ *
+ * 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 version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __LINUX_MFD_TPS68470_H
+#define __LINUX_MFD_TPS68470_H
+
+/* Register addresses */
+#define TPS68470_REG_POSTDIV2 0x06
+#define TPS68470_REG_BOOSTDIV 0x07
+#define TPS68470_REG_BUCKDIV 0x08
+#define TPS68470_REG_PLLSWR 0x09
+#define TPS68470_REG_XTALDIV 0x0A
+#define TPS68470_REG_PLLDIV 0x0B
+#define TPS68470_REG_POSTDIV 0x0C
+#define TPS68470_REG_PLLCTL 0x0D
+#define TPS68470_REG_PLLCTL2 0x0E
+#define TPS68470_REG_CLKCFG1 0x0F
+#define TPS68470_REG_CLKCFG2 0x10
+#define TPS68470_REG_GPCTL0A 0x14
+#define TPS68470_REG_GPCTL0B 0x15
+#define TPS68470_REG_GPCTL1A 0x16
+#define TPS68470_REG_GPCTL1B 0x17
+#define TPS68470_REG_GPCTL2A 0x18
+#define TPS68470_REG_GPCTL2B 0x19
+#define TPS68470_REG_GPCTL3A 0x1A
+#define TPS68470_REG_GPCTL3B 0x1B
+#define TPS68470_REG_GPCTL4A 0x1C
+#define TPS68470_REG_GPCTL4B 0x1D
+#define TPS68470_REG_GPCTL5A 0x1E
+#define TPS68470_REG_GPCTL5B 0x1F
+#define TPS68470_REG_GPCTL6A 0x20
+#define TPS68470_REG_GPCTL6B 0x21
+#define TPS68470_REG_SGPO 0x22
+#define TPS68470_REG_GPDI 0x26
+#define TPS68470_REG_GPDO 0x27
+#define TPS68470_REG_VCMVAL 0x3C
+#define TPS68470_REG_VAUX1VAL 0x3D
+#define TPS68470_REG_VAUX2VAL 0x3E
+#define TPS68470_REG_VIOVAL 0x3F
+#define TPS68470_REG_VSIOVAL 0x40
+#define TPS68470_REG_VAVAL 0x41
+#define TPS68470_REG_VDVAL 0x42
+#define TPS68470_REG_S_I2C_CTL 0x43
+#define TPS68470_REG_VCMCTL 0x44
+#define TPS68470_REG_VAUX1CTL 0x45
+#define TPS68470_REG_VAUX2CTL 0x46
+#define TPS68470_REG_VACTL 0x47
+#define TPS68470_REG_VDCTL 0x48
+#define TPS68470_REG_RESET 0x50
+#define TPS68470_REG_REVID 0xFF
+
+#define TPS68470_REG_MAX TPS68470_REG_REVID
+
+/* Register field definitions */
+
+#define TPS68470_REG_RESET_MASK GENMASK(7, 0)
+#define TPS68470_VAVAL_AVOLT_MASK GENMASK(6, 0)
+
+#define TPS68470_VDVAL_DVOLT_MASK GENMASK(5, 0)
+#define TPS68470_VCMVAL_VCVOLT_MASK GENMASK(6, 0)
+#define TPS68470_VIOVAL_IOVOLT_MASK GENMASK(6, 0)
+#define TPS68470_VSIOVAL_IOVOLT_MASK GENMASK(6, 0)
+#define TPS68470_VAUX1VAL_AUX1VOLT_MASK GENMASK(6, 0)
+#define TPS68470_VAUX2VAL_AUX2VOLT_MASK GENMASK(6, 0)
+
+#define TPS68470_VACTL_EN_MASK GENMASK(0, 0)
+#define TPS68470_VDCTL_EN_MASK GENMASK(0, 0)
+#define TPS68470_VCMCTL_EN_MASK GENMASK(0, 0)
+#define TPS68470_S_I2C_CTL_EN_MASK GENMASK(1, 0)
+#define TPS68470_VAUX1CTL_EN_MASK GENMASK(0, 0)
+#define TPS68470_VAUX2CTL_EN_MASK GENMASK(0, 0)
+#define TPS68470_PLL_EN_MASK GENMASK(0, 0)
+
+#define TPS68470_CLKCFG1_MODE_A_MASK GENMASK(1, 0)
+#define TPS68470_CLKCFG1_MODE_B_MASK GENMASK(3, 2)
+
+#define TPS68470_GPIO_CTL_REG_A(x) (TPS68470_REG_GPCTL0A + (x) * 2)
+#define TPS68470_GPIO_CTL_REG_B(x) (TPS68470_REG_GPCTL0B + (x) * 2)
+#define TPS68470_GPIO_MODE_MASK GENMASK(1, 0)
+#define TPS68470_GPIO_MODE_IN 0
+#define TPS68470_GPIO_MODE_IN_PULLUP 1
+#define TPS68470_GPIO_MODE_OUT_CMOS 2
+#define TPS68470_GPIO_MODE_OUT_ODRAIN 3
+
+#endif /* __LINUX_MFD_TPS68470_H */
--
1.9.1
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