[PATCH 1/3] mfd: lp87565: Add lp87565 PMIC support

Keerthy
2017-05-19T12:42:17Z

The LP87565 chip is a power management IC for Portable Navigation Systems
and Tablet Computing devices. It contains the following components:

- Configurable Bucks(Single and multi-phase).
- Configurable General Purpose Output Signals (GPO).

The LP87565-Q1 variant device uses two 2-phase outputs configuration,
Buck0 is master for Buck0/1 output and Buck2 is master for Buck2/3
output.

Signed-off-by: Keerthy <j-keerthy@ti.com>
---
Documentation/devicetree/bindings/mfd/lp87565.txt | 44 ++++
drivers/mfd/Kconfig | 14 ++
drivers/mfd/Makefile | 1 +
drivers/mfd/lp87565.c | 103 ++++++++
include/linux/mfd/lp87565.h | 275 ++++++++++++++++++++++
5 files changed, 437 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mfd/lp87565.txt
create mode 100644 drivers/mfd/lp87565.c
create mode 100644 include/linux/mfd/lp87565.h

diff --git a/Documentation/devicetree/bindings/mfd/lp87565.txt b/Documentation/devicetree/bindings/mfd/lp87565.txt
new file mode 100644
index 0000000..38a00a1
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/lp87565.txt
@@ -0,0 +1,44 @@
+TI LP873565 PMIC MFD driver
+
+Required properties:
+ - compatible: "ti,lp87565", "ti,lp87565-q1"
+ - reg: I2C slave address.
+ - gpio-controller: Marks the device node as a GPIO Controller.
+ - #gpio-cells: Should be two. The first cell is the pin number and
+ the second cell is used to specify flags.
+ See ../gpio/gpio.txt for more information.
+ - xxx-in-supply: Phandle to parent supply node of each regulator
+ populated under regulators node. xxx should match
+ the supply_name populated in driver.
+ - regulators: List of child nodes that specify the regulator
+ initialization data.
+Example:
+
+lp87565: lp87565@60 {
+ compatible = "ti,lp87565-q1";
+ reg = <0x60>;
+ gpio-controller;
+ #gpio-cells = <2>;
+
+ buck10-in-supply =<&vsys_3v3>;
+ buck23-in-supply =<&vsys_3v3>;
+ regulators: regulators {
+ buck10_reg: buck10 {
+ /*VDD_MPU*/
+ regulator-name = "buck10";
+ regulator-min-microvolt = <850000>;
+ regulator-max-microvolt = <1250000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+
+ buck23_reg: buck23 {
+ /* VDD_GPU*/
+ regulator-name = "buck23";
+ regulator-min-microvolt = <850000>;
+ regulator-max-microvolt = <1250000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ };
+};
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 3eb5c93..5e884f3 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1325,6 +1325,20 @@ config MFD_TI_LP873X
This driver can also be built as a module. If so, the module
will be called lp873x.

+config MFD_TI_LP87565
+ tristate "TI LP87565 Power Management IC"
+ depends on I2C
+ select MFD_CORE
+ select REGMAP_I2C
+ help
+ If you say yes here then you get support for the LP87565 series of
+ Power Management Integrated Circuits (PMIC).
+ These include voltage regulators, thermal protection, configurable
+ General Purpose Outputs (GPO) that are used in portable devices.
+
+ This driver can also be built as a module. If so, the module
+ will be called lp87565.
+
config MFD_TPS65218
tristate "TI TPS65218 Power Management chips"
depends on I2C
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index c16bf1e..7edbe1b 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -25,6 +25,7 @@ obj-$(CONFIG_HTC_PASIC3) += htc-pasic3.o
obj-$(CONFIG_HTC_I2CPLD) += htc-i2cpld.o

obj-$(CONFIG_MFD_TI_LP873X) += lp873x.o
+obj-$(CONFIG_MFD_TI_LP87565) += lp87565.o

obj-$(CONFIG_MFD_DAVINCI_VOICECODEC) += davinci_voicecodec.o
obj-$(CONFIG_MFD_DM355EVM_MSP) += dm355evm_msp.o
diff --git a/drivers/mfd/lp87565.c b/drivers/mfd/lp87565.c
new file mode 100644
index 0000000..dff882f
--- /dev/null
+++ b/drivers/mfd/lp87565.c
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * Author: Keerthy <j-keerthy@ti.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/interrupt.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+
+#include <linux/mfd/lp87565.h>
+
+static const struct regmap_config lp87565_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = LP87565_REG_MAX,
+};
+
+static const struct mfd_cell lp87565_cells[] = {
+ { .name = "lp87565-q1-regulator", },
+ { .name = "lp87565-q1-gpio", },
+};
+
+static const struct of_device_id of_lp87565_match_table[] = {
+ {
+ .compatible = "ti,lp87565-q1",
+ .data = (void *)LP87565_DEVICE_TYPE_LP87565_Q1,
+ },
+ {}
+};
+MODULE_DEVICE_TABLE(of, of_lp87565_match_table);
+
+static int lp87565_probe(struct i2c_client *client,
+ const struct i2c_device_id *ids)
+{
+ struct lp87565 *lp87565;
+ const struct of_device_id *of_id;
+ int ret;
+ unsigned int otpid;
+
+ lp87565 = devm_kzalloc(&client->dev, sizeof(*lp87565), GFP_KERNEL);
+ if (!lp87565)
+ return -ENOMEM;
+
+ lp87565->dev = &client->dev;
+
+ lp87565->regmap = devm_regmap_init_i2c(client, &lp87565_regmap_config);
+ if (IS_ERR(lp87565->regmap)) {
+ ret = PTR_ERR(lp87565->regmap);
+ dev_err(lp87565->dev,
+ "Failed to initialize register map: %d\n", ret);
+ return ret;
+ }
+
+ ret = regmap_read(lp87565->regmap, LP87565_REG_OTP_REV, &otpid);
+ if (ret) {
+ dev_err(lp87565->dev, "Failed to read OTP ID\n");
+ return ret;
+ }
+
+ lp87565->rev = otpid & LP87565_OTP_REV_OTP_ID;
+ of_id = of_match_device(of_lp87565_match_table, &client->dev);
+ if (of_id)
+ lp87565->dev_type = (enum lp87565_device_type)of_id->data;
+
+ i2c_set_clientdata(client, lp87565);
+
+ ret = mfd_add_devices(lp87565->dev, PLATFORM_DEVID_AUTO, lp87565_cells,
+ ARRAY_SIZE(lp87565_cells), NULL, 0, NULL);
+
+ return ret;
+}
+
+static const struct i2c_device_id lp87565_id_table[] = {
+ { "lp87565-q1", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, lp87565_id_table);
+
+static struct i2c_driver lp87565_driver = {
+ .driver = {
+ .name = "lp87565",
+ .of_match_table = of_lp87565_match_table,
+ },
+ .probe = lp87565_probe,
+ .id_table = lp87565_id_table,
+};
+module_i2c_driver(lp87565_driver);
+
+MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
+MODULE_DESCRIPTION("lp87565 chip family Multi-Function Device driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mfd/lp87565.h b/include/linux/mfd/lp87565.h
new file mode 100644
index 0000000..6112365
--- /dev/null
+++ b/include/linux/mfd/lp87565.h
@@ -0,0 +1,275 @@
+/*
+ * Functions to access LP87565 power management chip.
+ *
+ * Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.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.
+ */
+
+#ifndef __LINUX_MFD_LP87565_H
+#define __LINUX_MFD_LP87565_H
+
+#include <linux/i2c.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+
+enum lp87565_device_type {
+ LP87565_DEVICE_TYPE_UNKNOWN = 0,
+ LP87565_DEVICE_TYPE_LP87565_Q1,
+};
+
+/* All register addresses */
+#define LP87565_REG_DEV_REV 0X00
+#define LP87565_REG_OTP_REV 0X01
+#define LP87565_REG_BUCK0_CTRL_1 0X02
+#define LP87565_REG_BUCK0_CTRL_2 0X03
+
+#define LP87565_REG_BUCK1_CTRL_1 0X04
+#define LP87565_REG_BUCK1_CTRL_2 0X05
+
+#define LP87565_REG_BUCK2_CTRL_1 0X06
+#define LP87565_REG_BUCK2_CTRL_2 0X07
+
+#define LP87565_REG_BUCK3_CTRL_1 0X08
+#define LP87565_REG_BUCK3_CTRL_2 0X09
+
+#define LP87565_REG_BUCK0_VOUT 0X0A
+#define LP87565_REG_BUCK0_FLOOR_VOUT 0X0B
+
+#define LP87565_REG_BUCK1_VOUT 0X0C
+#define LP87565_REG_BUCK1_FLOOR_VOUT 0X0D
+
+#define LP87565_REG_BUCK2_VOUT 0X0E
+#define LP87565_REG_BUCK2_FLOOR_VOUT 0X0F
+
+#define LP87565_REG_BUCK3_VOUT 0X10
+#define LP87565_REG_BUCK3_FLOOR_VOUT 0X11
+
+#define LP87565_REG_BUCK0_DELAY 0X12
+#define LP87565_REG_BUCK1_DELAY 0X13
+
+#define LP87565_REG_BUCK2_DELAY 0X14
+#define LP87565_REG_BUCK3_DELAY 0X15
+
+#define LP87565_REG_GPO2_DELAY 0X16
+#define LP87565_REG_GPO3_DELAY 0X17
+#define LP87565_REG_RESET 0X18
+#define LP87565_REG_CONFIG 0X19
+
+#define LP87565_REG_INT_TOP_1 0X1A
+#define LP87565_REG_INT_TOP_2 0X1B
+
+#define LP87565_REG_INT_BUCK_0_1 0X1C
+#define LP87565_REG_INT_BUCK_2_3 0X1D
+#define LP87565_REG_TOP_STAT 0X1E
+#define LP87565_REG_BUCK_0_1_STAT 0X1F
+#define LP87565_REG_BUCK_2_3_STAT 0x20
+
+#define LP87565_REG_TOP_MASK_1 0x21
+#define LP87565_REG_TOP_MASK_2 0x22
+
+#define LP87565_REG_BUCK_0_1_MASK 0x23
+#define LP87565_REG_BUCK_2_3_MASK 0x24
+#define LP87565_REG_SEL_I_LOAD 0x25
+
+#define LP87565_REG_I_LOAD_2 0x26
+#define LP87565_REG_I_LOAD_1 0x27
+
+#define LP87565_REG_PGOOD_CTRL1 0x28
+#define LP87565_REG_PGOOD_CTRL2 0x29
+#define LP87565_REG_PGOOD_FLT 0x2A
+#define LP87565_REG_PLL_CTRL 0x2B
+#define LP87565_REG_PIN_FUNCTION 0x2C
+#define LP87565_REG_GPIO_CONFIG 0x2D
+#define LP87565_REG_GPIO_IN 0x2E
+#define LP87565_REG_GPIO_OUT 0x2F
+
+#define LP87565_REG_MAX LP87565_REG_GPIO_OUT
+
+/* Register field definitions */
+#define LP87565_DEV_REV_DEV_ID 0xC0
+#define LP87565_DEV_REV_ALL_LAYER 0x30
+#define LP87565_DEV_REV_METAL_LAYER 0x0F
+
+#define LP87565_OTP_REV_OTP_ID 0xFF
+
+#define LP87565_BUCK_CTRL_1_EN BIT(7)
+#define LP87565_BUCK_CTRL_1_EN_PIN_CTRL BIT(6)
+#define LP87565_BUCK_CTRL_1_PIN_SELECT_EN 0x30
+
+#define LP87565_BUCK_CTRL_1_ROOF_FLOOR_EN BIT(3)
+#define LP87565_BUCK_CTRL_1_RDIS_EN BIT(2)
+#define LP87565_BUCK_CTRL_1_FPWM BIT(1)
+/* Bit0 is reserved for BUCK1 and BUCK3 and valid only for BUCK0 and BUCK2 */
+#define LP87565_BUCK_CTRL_1_FPWM_MP_0_2 BIT(0)
+
+#define LP87565_BUCK_CTRL_2_ILIM 0x38
+#define LP87565_BUCK_CTRL_2_SLEW_RATE 0x07
+
+#define LP87565_BUCK_VSET 0xFF
+#define LP87565_BUCK_FLOOR_VSET 0xFF
+
+#define LP87565_BUCK_SHUTDOWN_DELAY 0xF0
+#define LP87565_BUCK_STARTUP_DELAY 0x0F
+
+#define LP87565_GPIO_SHUTDOWN_DELAY 0xF0
+#define LP87565_GPIO_STARTUP_DELAY 0x0F
+
+#define LP87565_RESET_SW_RESET BIT(0)
+
+#define LP87565_CONFIG_DOUBLE_DELAY BIT(7)
+#define LP87565_CONFIG_CLKIN_PD BIT(6)
+#define LP87565_CONFIG_EN4_PD BIT(5)
+#define LP87565_CONFIG_EN3_PD BIT(4)
+#define LP87565_CONFIG_TDIE_WARN_LEVEL BIT(3)
+#define LP87565_CONFIG_EN2_PD BIT(2)
+#define LP87565_CONFIG_EN1_PD BIT(1)
+
+#define LP87565_INT_GPIO BIT(7)
+#define LP87565_INT_BUCK23 BIT(6)
+#define LP87565_INT_BUCK01 BIT(5)
+#define LP87565_NO_SYNC_CLK BIT(4)
+#define LP87565_TDIE_SD BIT(3)
+#define LP87565_TDIE_WARN BIT(2)
+#define LP87565_INT_OVP BIT(1)
+#define LP87565_I_LOAD_READY BIT(0)
+
+#define LP87565_INT_TOP2_RESET_REG BIT(0)
+
+#define LP87565_BUCK1_PG_INT BIT(6)
+#define LP87565_BUCK1_SC_INT BIT(5)
+#define LP87565_BUCK1_ILIM_INT BIT(4)
+#define LP87565_BUCK0_PG_INT BIT(2)
+#define LP87565_BUCK0_SC_INT BIT(1)
+#define LP87565_BUCK0_ILIM_INT BIT(0)
+
+#define LP87565_BUCK3_PG_INT BIT(6)
+#define LP87565_BUCK3_SC_INT BIT(5)
+#define LP87565_BUCK3_ILIM_INT BIT(4)
+#define LP87565_BUCK2_PG_INT BIT(2)
+#define LP87565_BUCK2_SC_INT BIT(1)
+#define LP87565_BUCK2_ILIM_INT BIT(0)
+
+#define LP87565_SYNC_CLK_STAT BIT(4)
+#define LP87565_TDIE_SD_STAT BIT(3)
+#define LP87565_TDIE_WARN_STAT BIT(2)
+#define LP87565_OVP_STAT BIT(1)
+
+#define LP87565_BUCK1_STAT BIT(7)
+#define LP87565_BUCK1_PG_STAT BIT(6)
+#define LP87565_BUCK1_ILIM_STAT BIT(4)
+#define LP87565_BUCK0_STAT BIT(3)
+#define LP87565_BUCK0_PG_STAT BIT(2)
+#define LP87565_BUCK0_ILIM_STAT BIT(0)
+
+#define LP87565_BUCK3_STAT BIT(7)
+#define LP87565_BUCK3_PG_STAT BIT(6)
+#define LP87565_BUCK3_ILIM_STAT BIT(4)
+#define LP87565_BUCK2_STAT BIT(3)
+#define LP87565_BUCK2_PG_STAT BIT(2)
+#define LP87565_BUCK2_ILIM_STAT BIT(0)
+
+#define LPL87565_GPIO_MASK BIT(7)
+#define LPL87565_SYNC_CLK_MASK BIT(4)
+#define LPL87565_TDIE_WARN_MASK BIT(2)
+#define LPL87565_I_LOAD_READY_MASK BIT(0)
+
+#define LPL87565_RESET_REG_MASK BIT(0)
+
+#define LPL87565_BUCK1_PG_MASK BIT(6)
+#define LPL87565_BUCK1_ILIM_MASK BIT(4)
+#define LPL87565_BUCK0_PG_MASK BIT(2)
+#define LPL87565_BUCK0_ILIM_MASK BIT(0)
+
+#define LPL87565_BUCK3_PG_MASK BIT(6)
+#define LPL87565_BUCK3_ILIM_MASK BIT(4)
+#define LPL87565_BUCK2_PG_MASK BIT(2)
+#define LPL87565_BUCK2_ILIM_MASK BIT(0)
+
+#define LP87565_LOAD_CURRENT_BUCK_SELECT 0x3
+
+#define LP87565_I_LOAD2_BUCK_LOAD_CURRENT 0x3
+#define LP87565_I_LOAD1_BUCK_LOAD_CURRENT 0xFF
+
+#define LP87565_PG3_SEL 0xC0
+#define LP87565_PG2_SEL 0x30
+#define LP87565_PG1_SEL 0x0C
+#define LP87565_PG0_SEL 0x03
+
+#define LP87565_HALF_DAY BIT(7)
+#define LP87565_EN_PG0_NINT BIT(6)
+#define LP87565_PGOOD_SET_DELAY BIT(5)
+#define LP87565_EN_PGFLT_STAT BIT(4)
+#define LP87565_PGOOD_WINDOW BIT(2)
+#define LP87565_PGOOD_OD BIT(1)
+#define LP87565_PGOOD_POL BIT(0)
+
+#define LP87565_PG3_FLT BIT(3)
+#define LP87565_PG2_FLT BIT(2)
+#define LP87565_PG1_FLT BIT(1)
+#define LP87565_PG0_FLT BIT(0)
+
+#define LP87565_PLL_MODE 0xC0
+#define LP87565_EXT_CLK_FREQ 0x1F
+
+#define LP87565_EN_SPREAD_SPEC BIT(7)
+#define LP87565_EN_PIN_CTRL_GPIO3 BIT(6)
+#define LP87565_EN_PIN_SELECT_GPIO3 BIT(5)
+#define LP87565_EN_PIN_CTRL_GPIO2 BIT(4)
+#define LP87565_EN_PIN_SELECT_GPIO2 BIT(3)
+#define LP87565_GPIO3_SEL BIT(2)
+#define LP87565_GPIO2_SEL BIT(1)
+#define LP87565_GPIO1_SEL BIT(0)
+
+#define LP87565_GOIO3_OD BIT(6)
+#define LP87565_GOIO2_OD BIT(5)
+#define LP87565_GOIO1_OD BIT(4)
+#define LP87565_GOIO3_DIR BIT(2)
+#define LP87565_GOIO2_DIR BIT(1)
+#define LP87565_GOIO1_DIR BIT(0)
+
+#define LP87565_GOIO3_IN BIT(2)
+#define LP87565_GOIO2_IN BIT(1)
+#define LP87565_GOIO1_IN BIT(0)
+
+#define LP87565_GOIO3_OUT BIT(2)
+#define LP87565_GOIO2_OUT BIT(1)
+#define LP87565_GOIO1_OUT BIT(0)
+
+/* Number of step-down converters available */
+#define LP87565_NUM_BUCK 6
+
+enum LP87565_regulator_id {
+ /* BUCK's */
+ LP87565_BUCK_0,
+ LP87565_BUCK_1,
+ LP87565_BUCK_2,
+ LP87565_BUCK_3,
+ LP87565_BUCK_10,
+ LP87565_BUCK_23,
+};
+
+/**
+ * struct LP87565 - state holder for the LP87565 driver
+ * @dev: struct device pointer for MFD device
+ * @rev: revision of the LP87565
+ * @dev_type: The device type for example lp87565-q1
+ * @lock: lock guarding the data structure
+ * @regmap: register map of the LP87565 PMIC
+ *
+ * Device data may be used to access the LP87565 chip
+ */
+struct lp87565 {
+ struct device *dev;
+ u8 rev;
+ u8 dev_type;
+ struct regmap *regmap;
+};
+#endif /* __LINUX_MFD_LP87565_H */
--
1.9.1