[RESEND][PATCH V2 1/4] mfd: Add ROHM BD9571MWV-M PMIC DT bindings

[RESEND][PATCH V2 1/4] mfd: Add ROHM BD9571MWV-M PMIC DT bindings

[Marek Vasut]

Add DT bindings for the ROHM BD9571MWV-M PMIC. This PMIC has
the following features:
- multiple voltage monitors for 1V8, 2V5, 3V3 voltage rail
- one voltage regulator for DVFS
- two GPIOs

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: devicetree@vger.kernel.org
Cc: Rob Herring <robh@kernel.org>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: linux-renesas-soc@vger.kernel.org
---
V2: - Drop the compatible = "regulator-fixed" from the binding example,
      it should not be there.
    - List the VD09 regulator
---
 .../devicetree/bindings/mfd/bd9571mwv.txt          | 49 ++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/bd9571mwv.txt

diff --git a/Documentation/devicetree/bindings/mfd/bd9571mwv.txt b/Documentation/devicetree/bindings/mfd/bd9571mwv.txt
new file mode 100644
index 000000000000..ce24231edd7d
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/bd9571mwv.txt
@@ -0,0 +1,49 @@
+* ROHM BD9571MWV Power Management Integrated Circuit (PMIC) bindings
+
+Required properties:
+ - compatible		: Should be "rohm,bd9571mwv".
+ - reg			: I2C slave address.
+ - interrupt-parent	: Phandle to the parent interrupt controller.
+ - interrupts		: The interrupt line the device is connected to.
+ - interrupt-controller	: Marks the device node as an interrupt controller.
+ - #interrupt-cells	: The number of cells to describe an IRQ, should be 2.
+			    The first cell is the IRQ number.
+			    The second cell is the flags, encoded as trigger
+			    masks from ../interrupt-controller/interrupts.txt.
+ - 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.
+ - regulators:          : List of child nodes that specify the regulator
+                            initialization data. Child nodes must be named
+                            after their hardware counterparts:
+			     - vd09
+			     - vd18
+			     - vd25
+			     - vd33
+			     - dvfs
+			    Each child node is defined using the standard
+			    binding for regulators.
+
+Example:
+
+	pmic: bd9571mwv@30 {
+		compatible = "rohm,bd9571mwv";
+		reg = <0x30>;
+		interrupt-parent = <&gpio2>;
+		interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		gpio-controller;
+		#gpio-cells = <2>;
+
+		regulators {
+			dvfs: dvfs {
+				regulator-name = "dvfs";
+				regulator-min-microvolt = <750000>;
+				regulator-max-microvolt = <1030000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+		};
+	};
-- 
2.11.0

[RESEND][PATCH V2 2/4] mfd: Add ROHM BD9571MWV-M MFD PMIC driver

[Marek Vasut]

Add the MFD part of the ROHM BD9571MWV-M PMIC driver and MAINTAINERS
entry. The MFD part only specifies the regmap bits for the PMIC and
binds the subdevs together.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: linux-kernel@vger.kernel.org
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Lee Jones <lee.jones@linaro.org>
---
V2: - Change BD9571MWV_AVS_VD09_VID0,1,2,3 to BD9571MWV_AVS_VD09_VID(n)
    - Change BD9571MWV_AVS_DVFS_VID0,1,2,3 to BD9571MWV_AVS_DVFS_VID(n)
    - Make the AVS_VD09 range RW, so it can be used by the regulator
      driver for the VD09 regulator
    - Report the regmap read return values when attempting to read ID
      registers fails
---
 MAINTAINERS                   |  11 ++
 drivers/mfd/Kconfig           |  13 +++
 drivers/mfd/Makefile          |   1 +
 drivers/mfd/bd9571mwv.c       | 230 ++++++++++++++++++++++++++++++++++++++++++
 include/linux/mfd/bd9571mwv.h | 115 +++++++++++++++++++++
 5 files changed, 370 insertions(+)
 create mode 100644 drivers/mfd/bd9571mwv.c
 create mode 100644 include/linux/mfd/bd9571mwv.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 67280051e30a..6f19aa08375d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -10917,6 +10917,17 @@ L:	linux-serial@vger.kernel.org
 S:	Odd Fixes
 F:	drivers/tty/serial/rp2.*
 
+ROHM MULTIFUNCTION BD9571MWV-M PMIC DEVICE DRIVERS
+M:	Marek Vasut <marek.vasut+renesas@gmail.com>
+L:	linux-kernel@vger.kernel.org
+L:	linux-renesas-soc@vger.kernel.org
+S:	Supported
+F:	drivers/mfd/bd9571mwv.c
+F:	drivers/regulator/bd9571mwv-regulator.c
+F:	drivers/gpio/gpio-bd9571mwv.c
+F:	include/linux/mfd/bd9571mwv.h
+F:	Documentation/devicetree/bindings/mfd/bd9571mwv.txt
+
 ROSE NETWORK LAYER
 M:	Ralf Baechle <ralf@linux-mips.org>
 L:	linux-hams@vger.kernel.org
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index de68b5ba8741..fa1f41ef5332 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -133,6 +133,19 @@ config MFD_BCM590XX
 	help
 	  Support for the BCM590xx PMUs from Broadcom
 
+config MFD_BD9571MWV
+	tristate "ROHM BD9571MWV PMIC"
+	select MFD_CORE
+	select REGMAP_I2C
+	depends on I2C
+	help
+	  Support for the ROHM BD9571MWV PMIC, which contains single
+	  voltage regulator, voltage sampling units, GPIO block and
+	  watchdog block.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called bd9571mwv.
+
 config MFD_AC100
 	tristate "X-Powers AC100"
 	select MFD_CORE
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index fa86dbe65e52..e2c82d2b108d 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_MFD_ACT8945A)	+= act8945a.o
 obj-$(CONFIG_MFD_SM501)		+= sm501.o
 obj-$(CONFIG_MFD_ASIC3)		+= asic3.o tmio_core.o
 obj-$(CONFIG_MFD_BCM590XX)	+= bcm590xx.o
+obj-$(CONFIG_MFD_BD9571MWV)	+= bd9571mwv.o
 cros_ec_core-objs		:= cros_ec.o
 cros_ec_core-$(CONFIG_ACPI)	+= cros_ec_acpi_gpe.o
 obj-$(CONFIG_MFD_CROS_EC)	+= cros_ec_core.o
diff --git a/drivers/mfd/bd9571mwv.c b/drivers/mfd/bd9571mwv.c
new file mode 100644
index 000000000000..64e088dfe7b0
--- /dev/null
+++ b/drivers/mfd/bd9571mwv.c
@@ -0,0 +1,230 @@
+/*
+ * ROHM BD9571MWV-M MFD driver
+ *
+ * Copyright (C) 2017 Marek Vasut <marek.vasut+renesas@gmail.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 by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether expressed or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License version 2 for more details.
+ *
+ * Based on the TPS65086 driver
+ */
+
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+
+#include <linux/mfd/bd9571mwv.h>
+
+static const struct mfd_cell bd9571mwv_cells[] = {
+	{ .name = "bd9571mwv-regulator", },
+	{ .name = "bd9571mwv-gpio", },
+};
+
+static const struct regmap_range bd9571mwv_readable_yes_ranges[] = {
+	regmap_reg_range(BD9571MWV_VENDOR_CODE, BD9571MWV_PRODUCT_REVISION),
+	regmap_reg_range(BD9571MWV_AVS_SET_MONI, BD9571MWV_AVS_DVFS_VID(3)),
+	regmap_reg_range(BD9571MWV_VD18_VID, BD9571MWV_VD33_VID),
+	regmap_reg_range(BD9571MWV_DVFS_VINIT, BD9571MWV_DVFS_VINIT),
+	regmap_reg_range(BD9571MWV_DVFS_SETVMAX, BD9571MWV_DVFS_MONIVDAC),
+	regmap_reg_range(BD9571MWV_GPIO_IN, BD9571MWV_GPIO_IN),
+	regmap_reg_range(BD9571MWV_GPIO_INT, BD9571MWV_GPIO_INTMASK),
+	regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTMASK),
+};
+
+static const struct regmap_access_table bd9571mwv_readable_table = {
+	.yes_ranges	= bd9571mwv_readable_yes_ranges,
+	.n_yes_ranges	= ARRAY_SIZE(bd9571mwv_readable_yes_ranges),
+};
+
+static const struct regmap_range bd9571mwv_writable_yes_ranges[] = {
+	regmap_reg_range(BD9571MWV_AVS_VD09_VID(0), BD9571MWV_AVS_VD09_VID(3)),
+	regmap_reg_range(BD9571MWV_DVFS_SETVID, BD9571MWV_DVFS_SETVID),
+	regmap_reg_range(BD9571MWV_GPIO_DIR, BD9571MWV_GPIO_OUT),
+	regmap_reg_range(BD9571MWV_GPIO_INT_SET, BD9571MWV_GPIO_INTMASK),
+	regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTMASK),
+};
+
+static const struct regmap_access_table bd9571mwv_writable_table = {
+	.yes_ranges	= bd9571mwv_writable_yes_ranges,
+	.n_yes_ranges	= ARRAY_SIZE(bd9571mwv_writable_yes_ranges),
+};
+
+static const struct regmap_range bd9571mwv_volatile_yes_ranges[] = {
+	regmap_reg_range(BD9571MWV_GPIO_IN, BD9571MWV_GPIO_IN),
+	regmap_reg_range(BD9571MWV_GPIO_INT, BD9571MWV_GPIO_INT),
+	regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTREQ),
+};
+
+static const struct regmap_access_table bd9571mwv_volatile_table = {
+	.yes_ranges	= bd9571mwv_volatile_yes_ranges,
+	.n_yes_ranges	= ARRAY_SIZE(bd9571mwv_volatile_yes_ranges),
+};
+
+static const struct regmap_config bd9571mwv_regmap_config = {
+	.reg_bits	= 8,
+	.val_bits	= 8,
+	.cache_type	= REGCACHE_RBTREE,
+	.rd_table	= &bd9571mwv_readable_table,
+	.wr_table	= &bd9571mwv_writable_table,
+	.volatile_table	= &bd9571mwv_volatile_table,
+	.max_register	= 0xff,
+};
+
+static const struct regmap_irq bd9571mwv_irqs[] = {
+	REGMAP_IRQ_REG(BD9571MWV_IRQ_MD1, 0,
+		       BD9571MWV_INT_INTREQ_MD1_INT),
+	REGMAP_IRQ_REG(BD9571MWV_IRQ_MD2_E1, 0,
+		       BD9571MWV_INT_INTREQ_MD2_E1_INT),
+	REGMAP_IRQ_REG(BD9571MWV_IRQ_MD2_E2, 0,
+		       BD9571MWV_INT_INTREQ_MD2_E2_INT),
+	REGMAP_IRQ_REG(BD9571MWV_IRQ_PROT_ERR, 0,
+		       BD9571MWV_INT_INTREQ_PROT_ERR_INT),
+	REGMAP_IRQ_REG(BD9571MWV_IRQ_GP, 0,
+		       BD9571MWV_INT_INTREQ_GP_INT),
+	REGMAP_IRQ_REG(BD9571MWV_IRQ_128H_OF, 0,
+		       BD9571MWV_INT_INTREQ_128H_OF_INT),
+	REGMAP_IRQ_REG(BD9571MWV_IRQ_WDT_OF, 0,
+		       BD9571MWV_INT_INTREQ_WDT_OF_INT),
+	REGMAP_IRQ_REG(BD9571MWV_IRQ_BKUP_TRG, 0,
+		       BD9571MWV_INT_INTREQ_BKUP_TRG_INT),
+};
+
+static struct regmap_irq_chip bd9571mwv_irq_chip = {
+	.name		= "bd9571mwv",
+	.status_base	= BD9571MWV_INT_INTREQ,
+	.mask_base	= BD9571MWV_INT_INTMASK,
+	.ack_base	= BD9571MWV_INT_INTREQ,
+	.init_ack_masked = true,
+	.num_regs	= 1,
+	.irqs		= bd9571mwv_irqs,
+	.num_irqs	= ARRAY_SIZE(bd9571mwv_irqs),
+};
+
+static int bd9571mwv_identify(struct bd9571mwv *bd)
+{
+	struct device *dev = bd->dev;
+	unsigned int value;
+	int ret;
+
+	ret = regmap_read(bd->regmap, BD9571MWV_VENDOR_CODE, &value);
+	if (ret) {
+		dev_err(dev, "Failed to read vendor code register (ret=%i)\n",
+			ret);
+		return ret;
+	}
+
+	if (value != BD9571MWV_VENDOR_CODE_VAL) {
+		dev_err(dev, "Invalid vendor code ID %02x (expected %02x)\n",
+			value, BD9571MWV_VENDOR_CODE_VAL);
+		return -EINVAL;
+	}
+
+	ret = regmap_read(bd->regmap, BD9571MWV_PRODUCT_CODE, &value);
+	if (ret) {
+		dev_err(dev, "Failed to read product code register (ret=%i)\n",
+			ret);
+		return ret;
+	}
+
+	if (value != BD9571MWV_PRODUCT_CODE_VAL) {
+		dev_err(dev, "Invalid product code ID %02x (expected %02x)\n",
+			value, BD9571MWV_PRODUCT_CODE_VAL);
+		return -EINVAL;
+	}
+
+	ret = regmap_read(bd->regmap, BD9571MWV_PRODUCT_REVISION, &value);
+	if (ret) {
+		dev_err(dev, "Failed to read revision register (ret=%i)\n",
+			ret);
+		return ret;
+	}
+
+	dev_info(dev, "Device: BD9571MWV rev. %d\n", value & 0xff);
+
+	return 0;
+}
+
+static int bd9571mwv_probe(struct i2c_client *client,
+			  const struct i2c_device_id *ids)
+{
+	struct bd9571mwv *bd;
+	int ret;
+
+	bd = devm_kzalloc(&client->dev, sizeof(*bd), GFP_KERNEL);
+	if (!bd)
+		return -ENOMEM;
+
+	i2c_set_clientdata(client, bd);
+	bd->dev = &client->dev;
+	bd->irq = client->irq;
+
+	bd->regmap = devm_regmap_init_i2c(client, &bd9571mwv_regmap_config);
+	if (IS_ERR(bd->regmap)) {
+		dev_err(bd->dev, "Failed to initialize register map\n");
+		return PTR_ERR(bd->regmap);
+	}
+
+	ret = bd9571mwv_identify(bd);
+	if (ret)
+		return ret;
+
+	ret = regmap_add_irq_chip(bd->regmap, bd->irq, IRQF_ONESHOT, 0,
+				  &bd9571mwv_irq_chip, &bd->irq_data);
+	if (ret) {
+		dev_err(bd->dev, "Failed to register IRQ chip\n");
+		return ret;
+	}
+
+	ret = mfd_add_devices(bd->dev, PLATFORM_DEVID_AUTO, bd9571mwv_cells,
+			      ARRAY_SIZE(bd9571mwv_cells), NULL, 0,
+			      regmap_irq_get_domain(bd->irq_data));
+	if (ret) {
+		regmap_del_irq_chip(bd->irq, bd->irq_data);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int bd9571mwv_remove(struct i2c_client *client)
+{
+	struct bd9571mwv *bd = i2c_get_clientdata(client);
+
+	regmap_del_irq_chip(bd->irq, bd->irq_data);
+
+	return 0;
+}
+
+static const struct of_device_id bd9571mwv_of_match_table[] = {
+	{ .compatible = "rohm,bd9571mwv", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, bd9571mwv_of_match_table);
+
+static const struct i2c_device_id bd9571mwv_id_table[] = {
+	{ "bd9571mwv", 0 },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(i2c, bd9571mwv_id_table);
+
+static struct i2c_driver bd9571mwv_driver = {
+	.driver		= {
+		.name	= "bd9571mwv",
+		.of_match_table = bd9571mwv_of_match_table,
+	},
+	.probe		= bd9571mwv_probe,
+	.remove		= bd9571mwv_remove,
+	.id_table       = bd9571mwv_id_table,
+};
+module_i2c_driver(bd9571mwv_driver);
+
+MODULE_AUTHOR("Marek Vasut <marek.vasut+renesas@gmail.com>");
+MODULE_DESCRIPTION("BD9571MWV PMIC Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mfd/bd9571mwv.h b/include/linux/mfd/bd9571mwv.h
new file mode 100644
index 000000000000..f0708ba4cbba
--- /dev/null
+++ b/include/linux/mfd/bd9571mwv.h
@@ -0,0 +1,115 @@
+/*
+ * ROHM BD9571MWV-M driver
+ *
+ * Copyright (C) 2017 Marek Vasut <marek.vasut+renesas@gmail.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 by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether expressed or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License version 2 for more details.
+ *
+ * Based on the TPS65086 driver
+ */
+
+#ifndef __LINUX_MFD_BD9571MWV_H
+#define __LINUX_MFD_BD9571MWV_H
+
+#include <linux/device.h>
+#include <linux/regmap.h>
+
+/* List of registers for BD9571MWV */
+#define BD9571MWV_VENDOR_CODE			0x00
+#define BD9571MWV_VENDOR_CODE_VAL		0xdb
+#define BD9571MWV_PRODUCT_CODE			0x01
+#define BD9571MWV_PRODUCT_CODE_VAL		0x60
+#define BD9571MWV_PRODUCT_REVISION		0x02
+
+#define BD9571MWV_I2C_FUSA_MODE			0x10
+#define BD9571MWV_I2C_MD2_E1_BIT_1		0x11
+#define BD9571MWV_I2C_MD2_E1_BIT_2		0x12
+
+#define BD9571MWV_BKUP_MODE_CNT			0x20
+#define BD9571MWV_BKUP_MODE_STATUS		0x21
+#define BD9571MWV_BKUP_RECOVERY_CNT		0x22
+#define BD9571MWV_BKUP_CTRL_TIM_CNT		0x23
+#define BD9571MWV_WAITBKUP_WDT_CNT		0x24
+#define BD9571MWV_128H_TIM_CNT			0x26
+#define BD9571MWV_QLLM_CNT			0x27
+
+#define BD9571MWV_AVS_SET_MONI			0x31
+#define BD9571MWV_AVS_SET_MONI_MASK		0x3
+#define BD9571MWV_AVS_VD09_VID(n)		(0x32 + (n))
+#define BD9571MWV_AVS_DVFS_VID(n)		(0x36 + (n))
+
+#define BD9571MWV_VD18_VID			0x42
+#define BD9571MWV_VD25_VID			0x43
+#define BD9571MWV_VD33_VID			0x44
+
+#define BD9571MWV_DVFS_VINIT			0x50
+#define BD9571MWV_DVFS_SETVMAX			0x52
+#define BD9571MWV_DVFS_BOOSTVID			0x53
+#define BD9571MWV_DVFS_SETVID			0x54
+#define BD9571MWV_DVFS_MONIVDAC			0x55
+#define BD9571MWV_DVFS_PGD_CNT			0x56
+
+#define BD9571MWV_GPIO_DIR			0x60
+#define BD9571MWV_GPIO_OUT			0x61
+#define BD9571MWV_GPIO_IN			0x62
+#define BD9571MWV_GPIO_DEB			0x63
+#define BD9571MWV_GPIO_INT_SET			0x64
+#define BD9571MWV_GPIO_INT			0x65
+#define BD9571MWV_GPIO_INTMASK			0x66
+
+#define BD9571MWV_REG_KEEP(n)			(0x70 + (n))
+
+#define BD9571MWV_PMIC_INTERNAL_STATUS		0x80
+#define BD9571MWV_PROT_ERROR_STATUS0		0x81
+#define BD9571MWV_PROT_ERROR_STATUS1		0x82
+#define BD9571MWV_PROT_ERROR_STATUS2		0x83
+#define BD9571MWV_PROT_ERROR_STATUS3		0x84
+#define BD9571MWV_PROT_ERROR_STATUS4		0x85
+
+#define BD9571MWV_INT_INTREQ			0x90
+#define BD9571MWV_INT_INTREQ_MD1_INT		BIT(0)
+#define BD9571MWV_INT_INTREQ_MD2_E1_INT		BIT(1)
+#define BD9571MWV_INT_INTREQ_MD2_E2_INT		BIT(2)
+#define BD9571MWV_INT_INTREQ_PROT_ERR_INT	BIT(3)
+#define BD9571MWV_INT_INTREQ_GP_INT		BIT(4)
+#define BD9571MWV_INT_INTREQ_128H_OF_INT	BIT(5)
+#define BD9571MWV_INT_INTREQ_WDT_OF_INT		BIT(6)
+#define BD9571MWV_INT_INTREQ_BKUP_TRG_INT	BIT(7)
+#define BD9571MWV_INT_INTMASK			0x91
+
+#define BD9571MWV_ACCESS_KEY			0xff
+
+/* Define the BD9571MWV IRQ numbers */
+enum bd9571mwv_irqs {
+	BD9571MWV_IRQ_MD1,
+	BD9571MWV_IRQ_MD2_E1,
+	BD9571MWV_IRQ_MD2_E2,
+	BD9571MWV_IRQ_PROT_ERR,
+	BD9571MWV_IRQ_GP,
+	BD9571MWV_IRQ_128H_OF,
+	BD9571MWV_IRQ_WDT_OF,
+	BD9571MWV_IRQ_BKUP_TRG,
+};
+
+/**
+ * struct bd9571mwv - state holder for the bd9571mwv driver
+ *
+ * Device data may be used to access the BD9571MWV chip
+ */
+struct bd9571mwv {
+	struct device *dev;
+	struct regmap *regmap;
+
+	/* IRQ Data */
+	int irq;
+	struct regmap_irq_chip_data *irq_data;
+};
+
+#endif /* __LINUX_MFD_BD9571MWV_H */
-- 
2.11.0

[RESEND][PATCH V2 3/4] gpio: Add ROHM BD9571MWV-M PMIC GPIO driver

[Marek Vasut]

Add driver for the GPIO block in the ROHM BD9571MWV-W MFD PMIC.
This block is pretty trivial and supports setting GPIO direction
as Input/Output and in case of Output, supports setting value.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: linux-gpio@vger.kernel.org
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
---
V2: Use linux/gpio/driver.h instead of linux/gpio.h
---
 drivers/gpio/Kconfig          |  11 ++++
 drivers/gpio/Makefile         |   1 +
 drivers/gpio/gpio-bd9571mwv.c | 144 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 156 insertions(+)
 create mode 100644 drivers/gpio/gpio-bd9571mwv.c

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 63ceed246b6f..62f810a8663c 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -844,6 +844,17 @@ config GPIO_ARIZONA
 	help
 	  Support for GPIOs on Wolfson Arizona class devices.
 
+config GPIO_BD9571MWV
+	tristate "ROHM BD9571 GPIO support"
+	depends on MFD_BD9571MWV
+	help
+	  Support for GPIOs on ROHM BD9571 PMIC. There are two GPIOs
+	  available on the ROHM PMIC in total, both of which can also
+	  generate interrupts.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called gpio-bd9571mwv.
+
 config GPIO_CRYSTAL_COVE
 	tristate "GPIO support for Crystal Cove PMIC"
 	depends on (X86 || COMPILE_TEST) && INTEL_SOC_PMIC
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 095598e856ca..68b96277d9fa 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -33,6 +33,7 @@ obj-$(CONFIG_GPIO_ATH79)	+= gpio-ath79.o
 obj-$(CONFIG_GPIO_ASPEED)	+= gpio-aspeed.o
 obj-$(CONFIG_GPIO_AXP209)	+= gpio-axp209.o
 obj-$(CONFIG_GPIO_BCM_KONA)	+= gpio-bcm-kona.o
+obj-$(CONFIG_GPIO_BD9571MWV)	+= gpio-bd9571mwv.o
 obj-$(CONFIG_GPIO_BRCMSTB)	+= gpio-brcmstb.o
 obj-$(CONFIG_GPIO_BT8XX)	+= gpio-bt8xx.o
 obj-$(CONFIG_GPIO_CLPS711X)	+= gpio-clps711x.o
diff --git a/drivers/gpio/gpio-bd9571mwv.c b/drivers/gpio/gpio-bd9571mwv.c
new file mode 100644
index 000000000000..5224a946e8ab
--- /dev/null
+++ b/drivers/gpio/gpio-bd9571mwv.c
@@ -0,0 +1,144 @@
+/*
+ * ROHM BD9571MWV-M GPIO driver
+ *
+ * Copyright (C) 2017 Marek Vasut <marek.vasut+renesas@gmail.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 by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether expressed or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License version 2 for more details.
+ *
+ * Based on the TPS65086 driver
+ *
+ * NOTE: Interrupts are not supported yet.
+ */
+
+#include <linux/gpio/driver.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <linux/mfd/bd9571mwv.h>
+
+struct bd9571mwv_gpio {
+	struct gpio_chip chip;
+	struct bd9571mwv *bd;
+};
+
+static int bd9571mwv_gpio_get_direction(struct gpio_chip *chip,
+				       unsigned int offset)
+{
+	struct bd9571mwv_gpio *gpio = gpiochip_get_data(chip);
+	int ret, val;
+
+	ret = regmap_read(gpio->bd->regmap, BD9571MWV_GPIO_DIR, &val);
+	if (ret < 0)
+		return ret;
+
+	return val & BIT(offset);
+}
+
+static int bd9571mwv_gpio_direction_input(struct gpio_chip *chip,
+					 unsigned int offset)
+{
+	struct bd9571mwv_gpio *gpio = gpiochip_get_data(chip);
+
+	regmap_update_bits(gpio->bd->regmap, BD9571MWV_GPIO_DIR,
+			   BIT(offset), 0);
+
+	return 0;
+}
+
+static int bd9571mwv_gpio_direction_output(struct gpio_chip *chip,
+					  unsigned int offset, int value)
+{
+	struct bd9571mwv_gpio *gpio = gpiochip_get_data(chip);
+
+	/* Set the initial value */
+	regmap_update_bits(gpio->bd->regmap, BD9571MWV_GPIO_OUT,
+			   BIT(offset), value ? BIT(offset) : 0);
+	regmap_update_bits(gpio->bd->regmap, BD9571MWV_GPIO_DIR,
+			   BIT(offset), BIT(offset));
+
+	return 0;
+}
+
+static int bd9571mwv_gpio_get(struct gpio_chip *chip, unsigned int offset)
+{
+	struct bd9571mwv_gpio *gpio = gpiochip_get_data(chip);
+	int ret, val;
+
+	ret = regmap_read(gpio->bd->regmap, BD9571MWV_GPIO_IN, &val);
+	if (ret < 0)
+		return ret;
+
+	return val & BIT(offset);
+}
+
+static void bd9571mwv_gpio_set(struct gpio_chip *chip, unsigned int offset,
+			      int value)
+{
+	struct bd9571mwv_gpio *gpio = gpiochip_get_data(chip);
+
+	regmap_update_bits(gpio->bd->regmap, BD9571MWV_GPIO_OUT,
+			   BIT(offset), value ? BIT(offset) : 0);
+}
+
+static const struct gpio_chip template_chip = {
+	.label			= "bd9571mwv-gpio",
+	.owner			= THIS_MODULE,
+	.get_direction		= bd9571mwv_gpio_get_direction,
+	.direction_input	= bd9571mwv_gpio_direction_input,
+	.direction_output	= bd9571mwv_gpio_direction_output,
+	.get			= bd9571mwv_gpio_get,
+	.set			= bd9571mwv_gpio_set,
+	.base			= -1,
+	.ngpio			= 2,
+	.can_sleep		= true,
+};
+
+static int bd9571mwv_gpio_probe(struct platform_device *pdev)
+{
+	struct bd9571mwv_gpio *gpio;
+	int ret;
+
+	gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
+	if (!gpio)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, gpio);
+
+	gpio->bd = dev_get_drvdata(pdev->dev.parent);
+	gpio->chip = template_chip;
+	gpio->chip.parent = gpio->bd->dev;
+
+	ret = devm_gpiochip_add_data(&pdev->dev, &gpio->chip, gpio);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static const struct platform_device_id bd9571mwv_gpio_id_table[] = {
+	{ "bd9571mwv-gpio", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, bd9571mwv_gpio_id_table);
+
+static struct platform_driver bd9571mwv_gpio_driver = {
+	.driver = {
+		.name = "bd9571mwv-gpio",
+	},
+	.probe = bd9571mwv_gpio_probe,
+	.id_table = bd9571mwv_gpio_id_table,
+};
+module_platform_driver(bd9571mwv_gpio_driver);
+
+MODULE_AUTHOR("Marek Vasut <marek.vasut+renesas@gmail.com>");
+MODULE_DESCRIPTION("BD9571MWV GPIO driver");
+MODULE_LICENSE("GPL v2");
-- 
2.11.0

[RESEND][PATCH V2 4/4] regulator: Add ROHM BD9571MWV-M PMIC regulator driver

[Marek Vasut]

Add driver for the regulator block in the ROHM BD9571MWV-W MFD PMIC.
This block supports three voltage monitors, VD18, VD25, VD33 for the
1V8, 2V5, 3V3 voltage rails and a single voltage regulator for the
DVFS rail.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: linux-kernel@vger.kernel.org
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
---
V2: - Do not open-code the .is_enabled as the regulators are always enabled
    - Add the VD09 regulator
---
 drivers/regulator/Kconfig               |  11 ++
 drivers/regulator/Makefile              |   1 +
 drivers/regulator/bd9571mwv-regulator.c | 178 ++++++++++++++++++++++++++++++++
 3 files changed, 190 insertions(+)
 create mode 100644 drivers/regulator/bd9571mwv-regulator.c

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 290eeb88832c..b6e512df6df4 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -163,6 +163,17 @@ config REGULATOR_BCM590XX
 	  BCM590xx PMUs. This will enable support for the software
 	  controllable LDO/Switching regulators.
 
+config REGULATOR_BD9571MWV
+	tristate "ROHM BD9571MWV Regulators"
+	depends on MFD_BD9571MWV
+	help
+	  This driver provides support for the voltage regulators on the
+	  ROHM BD9571MWV PMIC. This will enable support for the software
+	  controllable regulator and voltage sampling units.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called bd9571mwv-regulator.
+
 config REGULATOR_CPCAP
 	tristate "Motorola CPCAP regulator"
 	depends on MFD_CPCAP
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index bf5ed7a9df99..c777c8493bf7 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -24,6 +24,7 @@ obj-$(CONFIG_REGULATOR_AS3711) += as3711-regulator.o
 obj-$(CONFIG_REGULATOR_AS3722) += as3722-regulator.o
 obj-$(CONFIG_REGULATOR_AXP20X) += axp20x-regulator.o
 obj-$(CONFIG_REGULATOR_BCM590XX) += bcm590xx-regulator.o
+obj-$(CONFIG_REGULATOR_BD9571MWV) += bd9571mwv-regulator.o
 obj-$(CONFIG_REGULATOR_DA903X)	+= da903x.o
 obj-$(CONFIG_REGULATOR_DA9052)	+= da9052-regulator.o
 obj-$(CONFIG_REGULATOR_DA9055)	+= da9055-regulator.o
diff --git a/drivers/regulator/bd9571mwv-regulator.c b/drivers/regulator/bd9571mwv-regulator.c
new file mode 100644
index 000000000000..8ba206fec31e
--- /dev/null
+++ b/drivers/regulator/bd9571mwv-regulator.c
@@ -0,0 +1,178 @@
+/*
+ * ROHM BD9571MWV-M regulator driver
+ *
+ * Copyright (C) 2017 Marek Vasut <marek.vasut+renesas@gmail.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 by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether expressed or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License version 2 for more details.
+ *
+ * Based on the TPS65086 driver
+ *
+ * NOTE: VD09 is missing
+ */
+
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+
+#include <linux/mfd/bd9571mwv.h>
+
+enum bd9571mwv_regulators { VD09, VD18, VD25, VD33, DVFS };
+
+#define BD9571MWV_REG(_name, _of, _id, _ops, _vr, _vm, _nv, _min, _step, _lmin)\
+	{							\
+		.name			= _name,		\
+		.of_match		= of_match_ptr(_of),	\
+		.regulators_node	= "regulators",		\
+		.id			= _id,			\
+		.ops			= &_ops,		\
+		.n_voltages		= _nv,			\
+		.type			= REGULATOR_VOLTAGE,	\
+		.owner			= THIS_MODULE,		\
+		.vsel_reg		= _vr,			\
+		.vsel_mask		= _vm,			\
+		.min_uV			= _min,			\
+		.uV_step		= _step,		\
+		.linear_min_sel		= _lmin,		\
+	}
+
+int bd9571mwv_avs_get_moni_state(struct regulator_dev *rdev)
+{
+	unsigned int val;
+	int ret;
+
+	ret = regmap_read(rdev->regmap, BD9571MWV_AVS_SET_MONI, &val);
+	if (ret != 0)
+		return ret;
+
+	return val & BD9571MWV_AVS_SET_MONI_MASK;
+}
+
+int bd9571mwv_avs_set_voltage_sel_regmap(struct regulator_dev *rdev,
+					 unsigned int sel)
+{
+	int ret;
+
+	ret = bd9571mwv_avs_get_moni_state(rdev);
+	if (ret < 0)
+		return ret;
+
+	return regmap_write_bits(rdev->regmap, BD9571MWV_AVS_VD09_VID(ret),
+				 rdev->desc->vsel_mask, sel);
+}
+
+int bd9571mwv_avs_get_voltage_sel_regmap(struct regulator_dev *rdev)
+{
+	unsigned int val;
+	int ret;
+
+	ret = bd9571mwv_avs_get_moni_state(rdev);
+	if (ret < 0)
+		return ret;
+
+	ret = regmap_read(rdev->regmap, BD9571MWV_AVS_VD09_VID(ret), &val);
+	if (ret != 0)
+		return ret;
+
+	val &= rdev->desc->vsel_mask;
+	val >>= ffs(rdev->desc->vsel_mask) - 1;
+
+	return val;
+}
+
+int bd9571mwv_reg_set_voltage_sel_regmap(struct regulator_dev *rdev,
+					 unsigned int sel)
+{
+	return regmap_write_bits(rdev->regmap, BD9571MWV_DVFS_SETVID,
+				 rdev->desc->vsel_mask, sel);
+}
+
+/* Operations permitted on AVS voltage regulator */
+static struct regulator_ops avs_ops = {
+	.set_voltage_sel	= bd9571mwv_avs_set_voltage_sel_regmap,
+	.map_voltage		= regulator_map_voltage_linear,
+	.get_voltage_sel	= bd9571mwv_avs_get_voltage_sel_regmap,
+	.list_voltage		= regulator_list_voltage_linear,
+};
+
+/* Operations permitted on voltage regulators */
+static struct regulator_ops reg_ops = {
+	.set_voltage_sel	= bd9571mwv_reg_set_voltage_sel_regmap,
+	.map_voltage		= regulator_map_voltage_linear,
+	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
+	.list_voltage		= regulator_list_voltage_linear,
+};
+
+/* Operations permitted on voltage monitors */
+static struct regulator_ops vid_ops = {
+	.map_voltage		= regulator_map_voltage_linear,
+	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
+	.list_voltage		= regulator_list_voltage_linear,
+};
+
+static struct regulator_desc regulators[] = {
+	BD9571MWV_REG("VD09", "vd09", VD09, avs_ops, 0, 0x7f,
+		      0x80, 600000, 10000, 0x3c),
+	BD9571MWV_REG("VD18", "vd18", VD18, vid_ops, BD9571MWV_VD18_VID, 0xf,
+		      16, 1625000, 25000, 0),
+	BD9571MWV_REG("VD25", "vd25", VD25, vid_ops, BD9571MWV_VD25_VID, 0xf,
+		      16, 2150000, 50000, 0),
+	BD9571MWV_REG("VD33", "vd33", VD33, vid_ops, BD9571MWV_VD33_VID, 0xf,
+		      11, 2800000, 100000, 0),
+	BD9571MWV_REG("DVFS", "dvfs", DVFS, reg_ops,
+		      BD9571MWV_DVFS_MONIVDAC, 0x7f,
+		      0x80, 600000, 10000, 0x3c),
+};
+
+static int bd9571mwv_regulator_probe(struct platform_device *pdev)
+{
+	struct bd9571mwv *bd = dev_get_drvdata(pdev->dev.parent);
+	struct regulator_config config = { };
+	struct regulator_dev *rdev;
+	int i;
+
+	platform_set_drvdata(pdev, bd);
+
+	config.dev = &pdev->dev;
+	config.dev->of_node = bd->dev->of_node;
+	config.driver_data = bd;
+	config.regmap = bd->regmap;
+
+	for (i = 0; i < ARRAY_SIZE(regulators); i++) {
+		rdev = devm_regulator_register(&pdev->dev, &regulators[i],
+					       &config);
+		if (IS_ERR(rdev)) {
+			dev_err(bd->dev, "failed to register %s regulator\n",
+				pdev->name);
+			return PTR_ERR(rdev);
+		}
+	}
+
+	return 0;
+}
+
+static const struct platform_device_id bd9571mwv_regulator_id_table[] = {
+	{ "bd9571mwv-regulator", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, bd9571mwv_regulator_id_table);
+
+static struct platform_driver bd9571mwv_regulator_driver = {
+	.driver = {
+		.name = "bd9571mwv-regulator",
+	},
+	.probe = bd9571mwv_regulator_probe,
+	.id_table = bd9571mwv_regulator_id_table,
+};
+module_platform_driver(bd9571mwv_regulator_driver);
+
+MODULE_AUTHOR("Marek Vasut <marek.vasut+renesas@gmail.com>");
+MODULE_DESCRIPTION("BD9571MWV Regulator driver");
+MODULE_LICENSE("GPL v2");
-- 
2.11.0

Re: [RESEND][PATCH V2 4/4] regulator: Add ROHM BD9571MWV-M PMIC regulator driver

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 581 bytes --]

On Tue, Apr 25, 2017 at 08:32:10PM +0200, Marek Vasut wrote:
> Add driver for the regulator block in the ROHM BD9571MWV-W MFD PMIC.
> This block supports three voltage monitors, VD18, VD25, VD33 for the
> 1V8, 2V5, 3V3 voltage rails and a single voltage regulator for the
> DVFS rail.

Please do not submit new versions of already applied patches, please
submit incremental updates to the existing code.  Modifying existing
commits creates problems for other users building on top of those
commits so it's best practice to only change pubished git commits if
absolutely essential.

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 488 bytes --]

Re: [RESEND][PATCH V2 4/4] regulator: Add ROHM BD9571MWV-M PMIC regulator driver

[Marek Vasut]

On 04/26/2017 12:31 AM, Mark Brown wrote:
> On Tue, Apr 25, 2017 at 08:32:10PM +0200, Marek Vasut wrote:
>> Add driver for the regulator block in the ROHM BD9571MWV-W MFD PMIC.
>> This block supports three voltage monitors, VD18, VD25, VD33 for the
>> 1V8, 2V5, 3V3 voltage rails and a single voltage regulator for the
>> DVFS rail.
> 
> Please do not submit new versions of already applied patches, please
> submit incremental updates to the existing code.  Modifying existing
> commits creates problems for other users building on top of those
> commits so it's best practice to only change pubished git commits if
> absolutely essential.

I resubmitted this on Lee's request [1].

[1]
https://www.mail-archive.com/linux-renesas-soc@vger.kernel.org/msg13599.html

-- 
Best regards,
Marek Vasut

Re: [RESEND][PATCH V2 4/4] regulator: Add ROHM BD9571MWV-M PMIC regulator driver

[Lee Jones]

On Wed, 26 Apr 2017, Marek Vasut wrote:
> On 04/26/2017 12:31 AM, Mark Brown wrote:
> > On Tue, Apr 25, 2017 at 08:32:10PM +0200, Marek Vasut wrote:
> >> Add driver for the regulator block in the ROHM BD9571MWV-W MFD PMIC.
> >> This block supports three voltage monitors, VD18, VD25, VD33 for the
> >> 1V8, 2V5, 3V3 voltage rails and a single voltage regulator for the
> >> DVFS rail.
> > 
> > Please do not submit new versions of already applied patches, please
> > submit incremental updates to the existing code.  Modifying existing
> > commits creates problems for other users building on top of those
> > commits so it's best practice to only change pubished git commits if
> > absolutely essential.
> 
> I resubmitted this on Lee's request [1].

I think you misunderstood.

Judging by what I've seen, I *assume* you want me to apply some
patches which would not normally come under my jurisdiction.  In order
for this to happen, you need to send those patches directly to me
(hyperlinks to some random representation of them somewhere on the
internets will not do), complete with Acks from their associated
Maintainer(s).  This is why I asked you for a [RESEND].  I made no
mention of resending patches which have already been applied into an
upstream tree.  There is seldom ever good reason to do this.

Moving forward I need you to do the following:

1. Remove any patches from the set which have already been applied
2. Apply all Acks you have collected to the patches
3. Resend only the ones you wish applied, not forgetting to Cc me

> [1]
> https://www.mail-archive.com/linux-renesas-soc@vger.kernel.org/msg13599.html

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [RESEND][PATCH V2 3/4] gpio: Add ROHM BD9571MWV-M PMIC GPIO driver

[Linus Walleij]

On Tue, Apr 25, 2017 at 8:32 PM, Marek Vasut <marek.vasut@gmail.com> wrote:

> Add driver for the GPIO block in the ROHM BD9571MWV-W MFD PMIC.
> This block is pretty trivial and supports setting GPIO direction
> as Input/Output and in case of Output, supports setting value.
>
> Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
> Cc: linux-gpio@vger.kernel.org
> Cc: Geert Uytterhoeven <geert+renesas@glider.be>
> Cc: Linus Walleij <linus.walleij@linaro.org>
> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
> ---
> V2: Use linux/gpio/driver.h instead of linux/gpio.h

I applied this for v4.12 to bring down the number of deps in
v4.13. The guarding symbol makes it not compile until the MFD
patch is there, the MFD_BD9571MWV is unlikely to change,
and Marek will certainly go through with the driver submission.

Yours,
Linus Walleij

Re: [RESEND][PATCH V2 3/4] gpio: Add ROHM BD9571MWV-M PMIC GPIO driver

[Lee Jones]

On Fri, 28 Apr 2017, Linus Walleij wrote:

> On Tue, Apr 25, 2017 at 8:32 PM, Marek Vasut <marek.vasut@gmail.com> wrote:
> 
> > Add driver for the GPIO block in the ROHM BD9571MWV-W MFD PMIC.
> > This block is pretty trivial and supports setting GPIO direction
> > as Input/Output and in case of Output, supports setting value.
> >
> > Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
> > Cc: linux-gpio@vger.kernel.org
> > Cc: Geert Uytterhoeven <geert+renesas@glider.be>
> > Cc: Linus Walleij <linus.walleij@linaro.org>
> > Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
> > ---
> > V2: Use linux/gpio/driver.h instead of linux/gpio.h
> 
> I applied this for v4.12 to bring down the number of deps in
> v4.13. The guarding symbol makes it not compile until the MFD
> patch is there, the MFD_BD9571MWV is unlikely to change,
> and Marek will certainly go through with the driver submission.

Works for me.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [RESEND][PATCH V2 1/4] mfd: Add ROHM BD9571MWV-M PMIC DT bindings

[Rob Herring]

On Tue, Apr 25, 2017 at 08:32:07PM +0200, Marek Vasut wrote:
> Add DT bindings for the ROHM BD9571MWV-M PMIC. This PMIC has
> the following features:
> - multiple voltage monitors for 1V8, 2V5, 3V3 voltage rail
> - one voltage regulator for DVFS
> - two GPIOs
> 
> Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
> Cc: devicetree@vger.kernel.org
> Cc: Rob Herring <robh@kernel.org>
> Cc: Geert Uytterhoeven <geert+renesas@glider.be>
> Cc: linux-renesas-soc@vger.kernel.org
> ---
> V2: - Drop the compatible = "regulator-fixed" from the binding example,
>       it should not be there.
>     - List the VD09 regulator
> ---
>  .../devicetree/bindings/mfd/bd9571mwv.txt          | 49 ++++++++++++++++++++++
>  1 file changed, 49 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mfd/bd9571mwv.txt
> 
> diff --git a/Documentation/devicetree/bindings/mfd/bd9571mwv.txt b/Documentation/devicetree/bindings/mfd/bd9571mwv.txt
> new file mode 100644
> index 000000000000..ce24231edd7d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/bd9571mwv.txt
> @@ -0,0 +1,49 @@
> +* ROHM BD9571MWV Power Management Integrated Circuit (PMIC) bindings
> +
> +Required properties:
> + - compatible		: Should be "rohm,bd9571mwv".
> + - reg			: I2C slave address.
> + - interrupt-parent	: Phandle to the parent interrupt controller.
> + - interrupts		: The interrupt line the device is connected to.
> + - interrupt-controller	: Marks the device node as an interrupt controller.
> + - #interrupt-cells	: The number of cells to describe an IRQ, should be 2.
> +			    The first cell is the IRQ number.
> +			    The second cell is the flags, encoded as trigger
> +			    masks from ../interrupt-controller/interrupts.txt.
> + - 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.
> + - regulators:          : List of child nodes that specify the regulator
> +                            initialization data. Child nodes must be named
> +                            after their hardware counterparts:
> +			     - vd09
> +			     - vd18
> +			     - vd25
> +			     - vd33
> +			     - dvfs
> +			    Each child node is defined using the standard
> +			    binding for regulators.
> +
> +Example:
> +
> +	pmic: bd9571mwv@30 {

pmic@30 ...

Otherwise,

Acked-by: Rob Herring <robh@kernel.org>