Re: [PATCH 2/4] mfd: Add initial MFD driver for ATC260x PMICs

Lee Jones
2019-06-26T06:57:08Z

On Mon, 17 Jun 2019, Manivannan Sadhasivam wrote:

> Add initial MFD driver for Actions Semi ATC260x PMICs. ATC260x series
> PMICs integrates Audio Codec, Power management, Clock generation, and GPIO
> controller blocks. This driver only supports Regulator functionality on
> ATC2609A PMIC variant for now.

Until you supply other functionality, this is not an MFD.

Please add additional support for more child devices.

> Since the PMICs can be accessed using both I2C and SPI busses, following
> driver structure has been adapted:
>
> ----->atc260x-core.c (Implements core funtionalities)
> /
> ATC260x--------->atc260x-i2c.c (Implements I2C interface)
> \
> ----->atc2609a-helpers.c (Implements ATC2609A specific helpers)
>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> ---
> drivers/mfd/Kconfig | 22 +++
> drivers/mfd/Makefile | 7 +
> drivers/mfd/atc2609a-helpers.c | 91 +++++++++
> drivers/mfd/atc260x-core.c | 85 ++++++++
> drivers/mfd/atc260x-i2c.c | 98 ++++++++++

Taking this set on it's own merits alone, I don't see a good reason to
split these up. Please either supply the SPI interface within this
patch-set or amalgamate them into a single file.

> drivers/mfd/atc260x.h | 22 +++
> include/linux/mfd/atc260x/atc2609a_regs.h | 228 ++++++++++++++++++++++
> include/linux/mfd/atc260x/core.h | 64 ++++++
> 8 files changed, 617 insertions(+)
> create mode 100644 drivers/mfd/atc2609a-helpers.c
> create mode 100644 drivers/mfd/atc260x-core.c
> create mode 100644 drivers/mfd/atc260x-i2c.c
> create mode 100644 drivers/mfd/atc260x.h
> create mode 100644 include/linux/mfd/atc260x/atc2609a_regs.h
> create mode 100644 include/linux/mfd/atc260x/core.h
>
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index a17d275bf1d4..eb388505357b 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -1945,6 +1945,28 @@ config MFD_STMFX
> additional drivers must be enabled in order to use the functionality
> of the device.
>
> +config MFD_ATC260X
> + tristate "Actions Semi ATC260x PMICs"
> + select MFD_CORE
> + select REGMAP
> + select REGMAP_IRQ
> + help
> + Support for the Actions Semi ATC260x PMICs.
> +
> +config MFD_ATC260X_I2C
> + tristate "Actions Semi ATC260x PMICs with I2C"
> + depends on MFD_ATC260X
> + depends on I2C
> + select REGMAP_I2C
> + help
> + Support for the Actions Semi ATC260x PMICs controlled via I2C.
> +
> +config MFD_ATC2609A
> + bool "Actions Semi ATC2609A PMIC"
> + depends on MFD_ATC260X
> + help
> + Support for Actions Semi ATC2609A PMIC
> +
> menu "Multimedia Capabilities Port drivers"
> depends on ARCH_SA1100
>
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index 52b1a90ff515..a87e7ed55a02 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -249,3 +249,10 @@ obj-$(CONFIG_MFD_SC27XX_PMIC) += sprd-sc27xx-spi.o
> obj-$(CONFIG_RAVE_SP_CORE) += rave-sp.o
> obj-$(CONFIG_MFD_ROHM_BD718XX) += rohm-bd718x7.o
> obj-$(CONFIG_MFD_STMFX) += stmfx.o
> +
> +atc260x-objs := atc260x-core.o
> +ifeq ($(CONFIG_MFD_ATC2609A),y)
> +atc260x-objs += atc2609a-helpers.o
> +endif
> +obj-$(CONFIG_MFD_ATC260X) += atc260x.o
> +obj-$(CONFIG_MFD_ATC260X_I2C) += atc260x-i2c.o
> diff --git a/drivers/mfd/atc2609a-helpers.c b/drivers/mfd/atc2609a-helpers.c
> new file mode 100644
> index 000000000000..6d304ea61552
> --- /dev/null
> +++ b/drivers/mfd/atc2609a-helpers.c
> @@ -0,0 +1,91 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Helper functions for ATC2609A PMIC
> + *
> + * Copyright (C) 2019 Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> + */
> +
> +#include <linux/mfd/atc260x/core.h>
> +#include <linux/mfd/core.h>
> +#include <linux/of.h>
> +#include <linux/regmap.h>
> +
> +#include "atc260x.h"
> +
> +const struct regmap_config atc2609a_regmap_config = {
> + .reg_bits = 8,
> + .val_bits = 16,
> + .max_register = ATC2609A_SADDR,
> + .cache_type = REGCACHE_NONE,
> +};
> +
> +const struct regmap_irq atc2609a_irqs[] = {
> + [ATC2609A_IRQ_AUDIO] = {
> + .reg_offset = 0,
> + .mask = BIT(0),
> + },
> + [ATC2609A_IRQ_OV] = {
> + .reg_offset = 0,
> + .mask = BIT(1),
> + },
> + [ATC2609A_IRQ_OC] = {
> + .reg_offset = 0,
> + .mask = BIT(2),
> + },
> + [ATC2609A_IRQ_OT] = {
> + .reg_offset = 0,
> + .mask = BIT(3),
> + },
> + [ATC2609A_IRQ_UV] = {
> + .reg_offset = 0,
> + .mask = BIT(4),
> + },
> + [ATC2609A_IRQ_ALARM] = {
> + .reg_offset = 0,
> + .mask = BIT(5),
> + },
> + [ATC2609A_IRQ_ONOFF] = {
> + .reg_offset = 0,
> + .mask = BIT(6),
> + },
> + [ATC2609A_IRQ_WKUP] = {
> + .reg_offset = 0,
> + .mask = BIT(7),
> + },
> + [ATC2609A_IRQ_IR] = {
> + .reg_offset = 0,
> + .mask = BIT(8),
> + },
> + [ATC2609A_IRQ_REMCON] = {
> + .reg_offset = 0,
> + .mask = BIT(9),
> + },
> + [ATC2609A_IRQ_POWER_IN] = {
> + .reg_offset = 0,
> + .mask = BIT(10),
> + },
> +};

Please use REGMAP_IRQ_REG()

> +const struct regmap_irq_chip atc2609a_regmap_irq_chip = {
> + .name = "atc2609a",
> + .irqs = atc2609a_irqs,
> + .num_irqs = ARRAY_SIZE(atc2609a_irqs),
> + .num_regs = 1,
> + .status_base = ATC2609A_INTS_PD,
> + .mask_base = ATC2609A_INTS_MSK,
> + .mask_invert = true,
> +};
> +
> +int atc2609a_dev_init(struct atc260x *atc260x)
> +{
> + /* Initialize interrupt block */
> + atc260x_cmu_reset(atc260x, ATC2609A_CMU_DEVRST, ATC260X_CMU_INTS,
> + ATC260X_CMU_INTS);
> +
> + /* Disable all interrupt sources */
> + regmap_write(atc260x->regmap, ATC2609A_INTS_MSK, 0);
> +
> + /* Enable EXTIRQ pad */
> + return regmap_update_bits(atc260x->regmap, ATC2609A_PAD_EN,
> + BIT(0), BIT(0));
> +}

No need for this to be in a separate file. We can support multiple
chips from a single source file. Only split them out when the level
of complexity makes it difficult to read/maintain.

> diff --git a/drivers/mfd/atc260x-core.c b/drivers/mfd/atc260x-core.c
> new file mode 100644
> index 000000000000..e65f1cb2648b
> --- /dev/null
> +++ b/drivers/mfd/atc260x-core.c
> @@ -0,0 +1,85 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Core MFD support for ATC260x PMICs
> + *
> + * Copyright (C) 2019 Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> + */
> +
> +#include <linux/interrupt.h>
> +#include <linux/mfd/atc260x/core.h>
> +#include <linux/mfd/core.h>
> +#include <linux/of.h>
> +#include <linux/regmap.h>
> +
> +#include "atc260x.h"
> +
> +void atc260x_cmu_reset(struct atc260x *atc260x, u32 reg, u8 mask, u32 bit)
> +{
> + /* Assert reset */
> + regmap_update_bits(atc260x->regmap, reg, mask, ~bit);
> +
> + /* De-assert reset */
> + regmap_update_bits(atc260x->regmap, reg, mask, bit);
> +}

I only see one call-site. Are you planning on reusing this?

> +int atc260x_core_init(struct atc260x *atc260x)
> +{
> + struct device *dev = atc260x->dev;
> + unsigned int chip_rev;
> + int ret;
> +
> + if (!atc260x->irq) {
> + dev_err(dev, "No interrupt support\n");
> + return -EINVAL;
> + }
> +
> + /* Initialize the hardware */
> + atc260x->dev_init(atc260x);

I don't think we need to mess around with pointers to functions in
this simple driver.

> + ret = regmap_read(atc260x->regmap, atc260x->rev_reg, &chip_rev);
> + if (ret) {
> + dev_err(dev, "Failed to read revision register\n");

End users don't care about registers.

"Failed to obtain chip revision"

> + return ret;
> + }
> +
> + if (chip_rev < 0 || chip_rev > 31) {

Do you really support 32 revisions?

> + dev_err(dev, "Unknown chip revision: %d\n", ret);
> + return -EINVAL;
> + }
> +
> + chip_rev = __ffs(chip_rev + 1U);

1 bit per revision? That is highly inefficient.

> + dev_info(dev, "%s chip revision: %d\n", atc260x->type_name, chip_rev);
> +
> + ret = regmap_add_irq_chip(atc260x->regmap, atc260x->irq,
> + IRQF_ONESHOT, -1,
> + atc260x->regmap_irq_chip, &atc260x->irq_data);
> + if (ret) {
> + dev_err(dev, "Failed to add irq_chip %d\n", ret);

"Failed to add IRQ Chip"

> + return ret;
> + }
> +
> + ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,
> + atc260x->cells, atc260x->nr_cells, NULL, 0,
> + regmap_irq_get_domain(atc260x->irq_data));
> + if (ret) {
> + dev_err(dev, "Failed to add MFD devices %d\n", ret);

"Failed to add child devices"

> + goto err_irq;
> + }
> +
> + return 0;
> +
> +err_irq:
> + regmap_del_irq_chip(atc260x->irq, atc260x->irq_data);
> +
> + return ret;
> +}
> +EXPORT_SYMBOL_GPL(atc260x_core_init);
> +
> +int atc260x_core_exit(struct atc260x *atc260x)
> +{
> + regmap_del_irq_chip(atc260x->irq, atc260x->irq_data);
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(atc260x_core_exit);
> diff --git a/drivers/mfd/atc260x-i2c.c b/drivers/mfd/atc260x-i2c.c
> new file mode 100644
> index 000000000000..3b7e8c1f5ac5
> --- /dev/null
> +++ b/drivers/mfd/atc260x-i2c.c
> @@ -0,0 +1,98 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * I2C bus interface for ATC260x PMICs
> + *
> + * Copyright (C) 2019 Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> + */
> +
> +#include <linux/i2c.h>
> +#include <linux/mfd/atc260x/core.h>
> +#include <linux/mfd/core.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +#include <linux/regmap.h>
> +
> +#include "atc260x.h"
> +
> +const struct mfd_cell atc2609a_mfd_cells[] = {
> + { .name = "atc260x-regulator", },
> +};

What other child devices are there?

Please add more, or this is not an MFD.

> +static int atc260x_i2c_probe(struct i2c_client *client,
> + const struct i2c_device_id *id)
> +{
> + struct atc260x *atc260x;
> + const void *of_data;
> + unsigned long atc260x_type;
> +
> + atc260x = devm_kzalloc(&client->dev, sizeof(*atc260x), GFP_KERNEL);
> + if (!atc260x)
> + return -ENOMEM;
> +
> + of_data = of_device_get_match_data(&client->dev);
> + if (!of_data)
> + return -ENODEV;
> +
> + atc260x_type = (unsigned long)of_data;
> +
> + switch (atc260x_type) {
> + case ATC2609A:

How many more models are you expecting to support?

> + atc260x->regmap_cfg = &atc2609a_regmap_config;
> + atc260x->regmap_irq_chip = &atc2609a_regmap_irq_chip;
> + atc260x->cells = atc2609a_mfd_cells;
> + atc260x->nr_cells = ARRAY_SIZE(atc2609a_mfd_cells);
> + atc260x->type_name = "atc2609a";
> + atc260x->rev_reg = ATC2609A_CHIP_VER;
> + atc260x->dev_init = atc2609a_dev_init;
> + break;
> + default:
> + dev_err(&client->dev,
> + "Unsupported ATC260x I2C device type %ld\n",
> + atc260x_type);
> + return -EINVAL;
> + }

I'd assume you'd have to replicate all of this for SPI too. That does
not sound like a good idea. Please find a better, more succinct way
to handle this i.e. in the core driver.

> + atc260x->regmap = devm_regmap_init_i2c(client, atc260x->regmap_cfg);
> + if (IS_ERR(atc260x->regmap)) {
> + dev_err(&client->dev, "regmap initialization failed\n");
> + return PTR_ERR(atc260x->regmap);
> + }
> +
> + i2c_set_clientdata(client, atc260x);
> + atc260x->type = atc260x_type;

> + atc260x->dev = &client->dev;
> + atc260x->irq = client->irq;

You already have 'dev' and 'irq' stored in 'client', which you need in
order retrieve them back anyway. So why store them again?

> + return atc260x_core_init(atc260x);
> +}
> +
> +static int atc260x_i2c_remove(struct i2c_client *client)
> +{
> + struct atc260x *atc260x = dev_get_drvdata(&client->dev);
> +
> + atc260x_core_exit(atc260x);
> +
> + return 0;
> +}
> +
> +const struct of_device_id atc260x_of_match[] = {
> + { .compatible = "actions,atc2609a", .data = (void *)ATC2609A },

Is there no way to dynamically request chip ID from the H/W?

> + { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(i2c, atc260x_of_match);
> +
> +static struct i2c_driver atc260x_i2c_driver = {
> + .driver = {
> + .name = "atc260x",
> + .of_match_table = of_match_ptr(atc260x_of_match),
> + },
> + .probe = atc260x_i2c_probe,
> + .remove = atc260x_i2c_remove,
> +};
> +
> +module_i2c_driver(atc260x_i2c_driver);
> +
> +MODULE_DESCRIPTION("ATC260x PMICs I2C bus interface");
> +MODULE_AUTHOR("Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>");
> +MODULE_LICENSE("GPL v2");
> diff --git a/drivers/mfd/atc260x.h b/drivers/mfd/atc260x.h
> new file mode 100644
> index 000000000000..30fc66dfba04
> --- /dev/null
> +++ b/drivers/mfd/atc260x.h
> @@ -0,0 +1,22 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * MFD internals for ATC260x PMICs
> + *
> + * Copyright (C) 2019 Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> + */
> +
> +#ifndef ATC260X_MFD_H
> +#define ATC260X_MFD_H
> +
> +extern const struct of_device_id atc260x_of_match[];
> +int atc260x_core_init(struct atc260x *atc260x);
> +int atc260x_core_exit(struct atc260x *atc260x);
> +void atc260x_cmu_reset(struct atc260x *atc260x, u32 reg, u8 mask, u32 bit);
> +
> +extern const struct regmap_config atc2609a_regmap_config;
> +extern const struct mfd_cell atc2609a_mfd_cells[];
> +extern const struct regmap_irq_chip atc2609a_regmap_irq_chip;
> +extern const struct regmap_irq atc2609a_irqs[];

Yuck! Please don't do this. Please put this stuff in one file.

> +int atc2609a_dev_init(struct atc260x *atc260x);
> +
> +#endif /* ATC260X_MFD_H */
> diff --git a/include/linux/mfd/atc260x/atc2609a_regs.h b/include/linux/mfd/atc260x/atc2609a_regs.h
> new file mode 100644
> index 000000000000..851fb3dadd4f
> --- /dev/null
> +++ b/include/linux/mfd/atc260x/atc2609a_regs.h
> @@ -0,0 +1,228 @@
> +/* SPDX-License-Identifier: GPL-2.0+ */
> +/*
> + * ATC2609A PMIC register definitions
> + *
> + * Copyright (C) 2019 Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> + */
> +
> +#ifndef __ATC2609A_REGS_H__
> +#define __ATC2609A_REGS_H__
> +
> +enum atc2609a_irq_def {
> + ATC2609A_IRQ_AUDIO = 0,
> + ATC2609A_IRQ_OV = 1,
> + ATC2609A_IRQ_OC = 2,
> + ATC2609A_IRQ_OT = 3,
> + ATC2609A_IRQ_UV = 4,
> + ATC2609A_IRQ_ALARM = 5,
> + ATC2609A_IRQ_ONOFF = 6,
> + ATC2609A_IRQ_WKUP = 7,
> + ATC2609A_IRQ_IR = 8,
> + ATC2609A_IRQ_REMCON = 9,
> + ATC2609A_IRQ_POWER_IN = 10,
> +};
> +
> +/* PMU Register */
> +#define ATC2609A_PMU_SYS_CTL0 0x00
> +#define ATC2609A_PMU_SYS_CTL1 0x01
> +#define ATC2609A_PMU_SYS_CTL2 0x02
> +#define ATC2609A_PMU_SYS_CTL3 0x03
> +#define ATC2609A_PMU_SYS_CTL4 0x04
> +#define ATC2609A_PMU_SYS_CTL5 0x05
> +#define ATC2609A_PMU_SYS_CTL6 0x06
> +#define ATC2609A_PMU_SYS_CTL7 0x07
> +#define ATC2609A_PMU_SYS_CTL8 0x08
> +#define ATC2609A_PMU_SYS_CTL9 0x09
> +#define ATC2609A_PMU_BAT_CTL0 0x0A
> +#define ATC2609A_PMU_BAT_CTL1 0x0B
> +#define ATC2609A_PMU_VBUS_CTL0 0x0C
> +#define ATC2609A_PMU_VBUS_CTL1 0x0D
> +#define ATC2609A_PMU_WALL_CTL0 0x0E
> +#define ATC2609A_PMU_WALL_CTL1 0x0F
> +#define ATC2609A_PMU_SYS_PENDING 0x10
> +#define ATC2609A_PMU_APDS_CTL0 0x11
> +#define ATC2609A_PMU_APDS_CTL1 0x12
> +#define ATC2609A_PMU_APDS_CTL2 0x13
> +#define ATC2609A_PMU_CHARGER_CTL 0x14
> +#define ATC2609A_PMU_BAKCHARGER_CTL 0x15
> +#define ATC2609A_PMU_SWCHG_CTL0 0x16
> +#define ATC2609A_PMU_SWCHG_CTL1 0x17
> +#define ATC2609A_PMU_SWCHG_CTL2 0x18
> +#define ATC2609A_PMU_SWCHG_CTL3 0x19
> +#define ATC2609A_PMU_SWCHG_CTL4 0x1A
> +#define ATC2609A_PMU_DC_OSC 0x1B
> +#define ATC2609A_PMU_DC0_CTL0 0x1C
> +#define ATC2609A_PMU_DC0_CTL1 0x1D
> +#define ATC2609A_PMU_DC0_CTL2 0x1E
> +#define ATC2609A_PMU_DC0_CTL3 0x1F
> +#define ATC2609A_PMU_DC0_CTL4 0x20
> +#define ATC2609A_PMU_DC0_CTL5 0x21
> +#define ATC2609A_PMU_DC0_CTL6 0x22
> +#define ATC2609A_PMU_DC1_CTL0 0x23
> +#define ATC2609A_PMU_DC1_CTL1 0x24
> +#define ATC2609A_PMU_DC1_CTL2 0x25
> +#define ATC2609A_PMU_DC1_CTL3 0x26
> +#define ATC2609A_PMU_DC1_CTL4 0x27
> +#define ATC2609A_PMU_DC1_CTL5 0x28
> +#define ATC2609A_PMU_DC1_CTL6 0x29
> +#define ATC2609A_PMU_DC2_CTL0 0x2A
> +#define ATC2609A_PMU_DC2_CTL1 0x2B
> +#define ATC2609A_PMU_DC2_CTL2 0x2C
> +#define ATC2609A_PMU_DC2_CTL3 0x2D
> +#define ATC2609A_PMU_DC2_CTL4 0x2E
> +#define ATC2609A_PMU_DC2_CTL5 0x2F
> +#define ATC2609A_PMU_DC2_CTL6 0x30
> +#define ATC2609A_PMU_DC3_CTL0 0x31
> +#define ATC2609A_PMU_DC3_CTL1 0x32
> +#define ATC2609A_PMU_DC3_CTL2 0x33
> +#define ATC2609A_PMU_DC3_CTL3 0x34
> +#define ATC2609A_PMU_DC3_CTL4 0x35
> +#define ATC2609A_PMU_DC3_CTL5 0x36
> +#define ATC2609A_PMU_DC3_CTL6 0x37
> +#define ATC2609A_PMU_DC_ZR 0x38
> +#define ATC2609A_PMU_LDO0_CTL0 0x39
> +#define ATC2609A_PMU_LDO0_CTL1 0x3A
> +#define ATC2609A_PMU_LDO1_CTL0 0x3B
> +#define ATC2609A_PMU_LDO1_CTL1 0x3C
> +#define ATC2609A_PMU_LDO2_CTL0 0x3D
> +#define ATC2609A_PMU_LDO2_CTL1 0x3E
> +#define ATC2609A_PMU_LDO3_CTL0 0x3F
> +#define ATC2609A_PMU_LDO3_CTL1 0x40
> +#define ATC2609A_PMU_LDO4_CTL0 0x41
> +#define ATC2609A_PMU_LDO4_CTL1 0x42
> +#define ATC2609A_PMU_LDO5_CTL0 0x43
> +#define ATC2609A_PMU_LDO5_CTL1 0x44
> +#define ATC2609A_PMU_LDO6_CTL0 0x45
> +#define ATC2609A_PMU_LDO6_CTL1 0x46
> +#define ATC2609A_PMU_LDO7_CTL0 0x47
> +#define ATC2609A_PMU_LDO7_CTL1 0x48
> +#define ATC2609A_PMU_LDO8_CTL0 0x49
> +#define ATC2609A_PMU_LDO8_CTL1 0x4A
> +#define ATC2609A_PMU_LDO9_CTL 0x4B
> +#define ATC2609A_PMU_OV_INT_EN 0x4C
> +#define ATC2609A_PMU_OV_STATUS 0x4D
> +#define ATC2609A_PMU_UV_INT_EN 0x4E
> +#define ATC2609A_PMU_UV_STATUS 0x4F
> +#define ATC2609A_PMU_OC_INT_EN 0x50
> +#define ATC2609A_PMU_OC_STATUS 0x51
> +#define ATC2609A_PMU_OT_CTL 0x52
> +#define ATC2609A_PMU_CM_CTL0 0x53
> +#define ATC2609A_PMU_FW_USE0 0x54
> +#define ATC2609A_PMU_FW_USE1 0x55
> +#define ATC2609A_PMU_ADC12B_I 0x56
> +#define ATC2609A_PMU_ADC12B_V 0x57
> +#define ATC2609A_PMU_ADC12B_DUMMY 0x58
> +#define ATC2609A_PMU_AUXADC_CTL0 0x59
> +#define ATC2609A_PMU_AUXADC_CTL1 0x5A
> +#define ATC2609A_PMU_BATVADC 0x5B
> +#define ATC2609A_PMU_BATIADC 0x5C
> +#define ATC2609A_PMU_WALLVADC 0x5D
> +#define ATC2609A_PMU_WALLIADC 0x5E
> +#define ATC2609A_PMU_VBUSVADC 0x5F
> +#define ATC2609A_PMU_VBUSIADC 0x60
> +#define ATC2609A_PMU_SYSPWRADC 0x61
> +#define ATC2609A_PMU_REMCONADC 0x62
> +#define ATC2609A_PMU_SVCCADC 0x63
> +#define ATC2609A_PMU_CHGIADC 0x64
> +#define ATC2609A_PMU_IREFADC 0x65
> +#define ATC2609A_PMU_BAKBATADC 0x66
> +#define ATC2609A_PMU_ICTEMPADC 0x67
> +#define ATC2609A_PMU_AUXADC0 0x68
> +#define ATC2609A_PMU_AUXADC1 0x69
> +#define ATC2609A_PMU_AUXADC2 0x6A
> +#define ATC2609A_PMU_AUXADC3 0x6B
> +#define ATC2609A_PMU_ICTEMPADC_ADJ 0x6C
> +#define ATC2609A_PMU_BDG_CTL 0x6D
> +#define ATC2609A_RTC_CTL 0x6E
> +#define ATC2609A_RTC_MSALM 0x6F
> +#define ATC2609A_RTC_HALM 0x70
> +#define ATC2609A_RTC_YMDALM 0x71
> +#define ATC2609A_RTC_MS 0x72
> +#define ATC2609A_RTC_H 0x73
> +#define ATC2609A_RTC_DC 0x74
> +#define ATC2609A_RTC_YMD 0x75
> +#define ATC2609A_EFUSE_DAT 0x76
> +#define ATC2609A_EFUSECRTL1 0x77
> +#define ATC2609A_EFUSECRTL2 0x78
> +#define ATC2609A_PMU_DC4_CTL0 0x79
> +#define ATC2609A_PMU_DC4_CTL1 0x7A
> +#define ATC2609A_PMU_DC4_CTL2 0x7B
> +#define ATC2609A_PMU_DC4_CTL3 0x7C
> +#define ATC2609A_PMU_DC4_CTL4 0x7D
> +#define ATC2609A_PMU_DC4_CTL5 0x7E
> +#define ATC2609A_PMU_DC4_CTL6 0x7F
> +#define ATC2609A_PMU_PWR_STATUS 0x80
> +#define ATC2609A_PMU_S2_PWR 0x81
> +#define ATC2609A_CLMT_CTL0 0x82
> +#define ATC2609A_CLMT_DATA0 0x83
> +#define ATC2609A_CLMT_DATA1 0x84
> +#define ATC2609A_CLMT_DATA2 0x85
> +#define ATC2609A_CLMT_DATA3 0x86
> +#define ATC2609A_CLMT_ADD0 0x87
> +#define ATC2609A_CLMT_ADD1 0x88
> +#define ATC2609A_CLMT_OCV_TABLE 0x89
> +#define ATC2609A_CLMT_R_TABLE 0x8A
> +#define ATC2609A_PMU_PWRON_CTL0 0x8D
> +#define ATC2609A_PMU_PWRON_CTL1 0x8E
> +#define ATC2609A_PMU_PWRON_CTL2 0x8F
> +#define ATC2609A_IRC_CTL 0x90
> +#define ATC2609A_IRC_STAT 0x91
> +#define ATC2609A_IRC_CC 0x92
> +#define ATC2609A_IRC_KDC 0x93
> +#define ATC2609A_IRC_WK 0x94
> +#define ATC2609A_IRC_RCC 0x95
> +
> +/* AUDIO_OUT Register */
> +#define ATC2609A_AUDIOINOUT_CTL 0xA0
> +#define ATC2609A_AUDIO_DEBUGOUTCTL 0xA1
> +#define ATC2609A_DAC_DIGITALCTL 0xA2
> +#define ATC2609A_DAC_VOLUMECTL0 0xA3
> +#define ATC2609A_DAC_ANALOG0 0xA4
> +#define ATC2609A_DAC_ANALOG1 0xA5
> +#define ATC2609A_DAC_ANALOG2 0xA6
> +#define ATC2609A_DAC_ANALOG3 0xA7
> +
> +/* AUDIO_IN Register */
> +#define ATC2609A_ADC_DIGITALCTL 0xA8
> +#define ATC2609A_ADC_HPFCTL 0xA9
> +#define ATC2609A_ADC_CTL 0xAA
> +#define ATC2609A_AGC_CTL0 0xAB
> +#define ATC2609A_AGC_CTL1 0xAC
> +#define ATC2609A_AGC_CTL2 0xAD
> +#define ATC2609A_ADC_ANALOG0 0xAE
> +#define ATC2609A_ADC_ANALOG1 0xAF
> +
> +/* PCM_IF Register */
> +#define ATC2609A_PCM0_CTL 0xB0
> +#define ATC2609A_PCM1_CTL 0xB1
> +#define ATC2609A_PCM2_CTL 0xB2
> +#define ATC2609A_PCMIF_CTL 0xB3
> +
> +/* CMU_CONTROL Register */
> +#define ATC2609A_CMU_DEVRST 0xC1
> +
> +/* INTS Register */
> +#define ATC2609A_INTS_PD 0xC8
> +#define ATC2609A_INTS_MSK 0xC9
> +
> +/* MFP Register */
> +#define ATC2609A_MFP_CTL 0xD0
> +#define ATC2609A_PAD_VSEL 0xD1
> +#define ATC2609A_GPIO_OUTEN 0xD2
> +#define ATC2609A_GPIO_INEN 0xD3
> +#define ATC2609A_GPIO_DAT 0xD4
> +#define ATC2609A_PAD_DRV 0xD5
> +#define ATC2609A_PAD_EN 0xD6
> +#define ATC2609A_DEBUG_SEL 0xD7
> +#define ATC2609A_DEBUG_IE 0xD8
> +#define ATC2609A_DEBUG_OE 0xD9
> +#define ATC2609A_CHIP_VER 0xDC
> +
> +/* PWSI Register */
> +#define ATC2609A_PWSI_CTL 0xF0
> +#define ATC2609A_PWSI_STATUS 0xF1
> +
> +/* TWSI Register */
> +#define ATC2609A_SADDR 0xFF
> +
> +#endif /* __ATC2609A_REGS_H__ */
> diff --git a/include/linux/mfd/atc260x/core.h b/include/linux/mfd/atc260x/core.h
> new file mode 100644
> index 000000000000..9d75eca731d4
> --- /dev/null
> +++ b/include/linux/mfd/atc260x/core.h
> @@ -0,0 +1,64 @@
> +/* SPDX-License-Identifier: GPL-2.0+ */
> +/*
> + * Core MFD defines for ATC260x PMICs
> + *
> + * Copyright (C) 2019 Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> + */
> +
> +#ifndef __ATC260X_CORE_H__
> +#define __ATC260X_CORE_H__
> +
> +#include <linux/mfd/atc260x/atc2609a_regs.h>
> +
> +enum atc260x_type {
> + ATC2603A = 0,
> + ATC2603C = 1,
> + ATC2609A = 2,

Why don't you let the enum enumerate these numbers for you?

> +};
> +
> +enum atc260x_reg {
> + ATC2609A_ID_DCDC0,
> + ATC2609A_ID_DCDC1,
> + ATC2609A_ID_DCDC2,
> + ATC2609A_ID_DCDC3,
> + ATC2609A_ID_DCDC4,
> + ATC2609A_ID_LDO0,
> + ATC2609A_ID_LDO1,
> + ATC2609A_ID_LDO2,
> + ATC2609A_ID_LDO3,
> + ATC2609A_ID_LDO4,
> + ATC2609A_ID_LDO5,
> + ATC2609A_ID_LDO6,
> + ATC2609A_ID_LDO7,
> + ATC2609A_ID_LDO8,
> + ATC2609A_ID_LDO9,
> + ATC2609A_ID_MAX,
> +};
> +
> +enum atc260x_cmu_bits {
> + ATC260X_CMU_TP = 0,
> + ATC260X_CMU_MFP = 1,
> + ATC260X_CMU_INTS = 2,
> + ATC260X_CMU_ETHPHY = 3,
> + ATC260X_CMU_AUDIO = 4,
> + ATC260X_CMU_PWSI = 5,
> +};

Why don't you let the enum enumerate these numbers for you?

> +struct atc260x {
> + struct device *dev;
> + struct regmap_irq_chip_data *irq_data;
> + struct regmap *regmap;
> + const struct regmap_config *regmap_cfg;
> + const struct regmap_irq_chip *regmap_irq_chip;
> + const struct mfd_cell *cells;
> + int nr_cells;
> + int irq;
> +
> + enum atc260x_type type;
> + const char *type_name;
> + unsigned int rev_reg;
> +
> + int (*dev_init)(struct atc260x *atc260x);
> +};

If you do this right, you could probably remove this struct
completely.

> +#endif /* __ATC260X_CORE_H__ */

--
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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