Re: [PATCH v2 09/17] mfd: Support for ROHM BD71815 PMIC core

From: Lee Jones
Date: Tue Jan 26 2021 - 01:32:45 EST

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On Tue, 19 Jan 2021, Matti Vaittinen wrote:

> Add core support for ROHM BD71815 Power Management IC.
>
> The IC integrates regulators, a battery charger with a coulomb counter,
> a real-time clock (RTC), clock gate and general-purpose outputs (GPO).
>
> Signed-off-by: Matti Vaittinen <matti.vaittinen@xxxxxxxxxxxxxxxxx>
> ---
> Changes since v1:
> - Used BIT() for better readability
> - removed some unused definitions
>
> drivers/mfd/Kconfig | 15 +-
> drivers/mfd/rohm-bd71828.c | 416 +++++++++++++++++++++--
> include/linux/mfd/rohm-bd71815.h | 561 +++++++++++++++++++++++++++++++
> include/linux/mfd/rohm-bd71828.h | 3 +
> 4 files changed, 952 insertions(+), 43 deletions(-)
> create mode 100644 include/linux/mfd/rohm-bd71815.h
>
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index bdfce7b15621..59bfacb91898 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -1984,19 +1984,20 @@ config MFD_ROHM_BD70528
> charger.
>
> config MFD_ROHM_BD71828
> - tristate "ROHM BD71828 Power Management IC"
> + tristate "ROHM BD71828 and BD71815 Power Management IC"
> depends on I2C=y
> depends on OF
> select REGMAP_I2C
> select REGMAP_IRQ
> select MFD_CORE
> help
> - Select this option to get support for the ROHM BD71828 Power
> - Management IC. BD71828GW is a single-chip power management IC for
> - battery-powered portable devices. The IC integrates 7 buck
> - converters, 7 LDOs, and a 1500 mA single-cell linear charger.
> - Also included is a Coulomb counter, a real-time clock (RTC), and
> - a 32.768 kHz clock gate.
> + Select this option to get support for the ROHM BD71828 and BD71815
> + Power Management ICs. BD71828GW and BD71815AGW are single-chip power
> + management ICs mainly for battery-powered portable devices.
> + The BD71828 integrates 7 buck converters and 7 LDOs. The BD71815
> + has 5 bucks, 7 LDOs, and a boost for driving LEDs. Both ICs provide
> + also a single-cell linear charger, a Coulomb counter, a real-time
> + clock (RTC), GPIOs and a 32.768 kHz clock gate.
>
> config MFD_STM32_LPTIMER
> tristate "Support for STM32 Low-Power Timer"
> diff --git a/drivers/mfd/rohm-bd71828.c b/drivers/mfd/rohm-bd71828.c
> index 210261d026f2..28b82477ce4c 100644
> --- a/drivers/mfd/rohm-bd71828.c
> +++ b/drivers/mfd/rohm-bd71828.c
> @@ -2,7 +2,7 @@
> //
> // Copyright (C) 2019 ROHM Semiconductors
> //
> -// ROHM BD71828 PMIC driver
> +// ROHM BD71828/BD71815 PMIC driver
>
> #include <linux/gpio_keys.h>
> #include <linux/i2c.h>
> @@ -11,7 +11,9 @@
> #include <linux/ioport.h>
> #include <linux/irq.h>
> #include <linux/mfd/core.h>
> +#include <linux/mfd/rohm-bd71815.h>
> #include <linux/mfd/rohm-bd71828.h>
> +#include <linux/mfd/rohm-generic.h>
> #include <linux/module.h>
> #include <linux/of_device.h>
> #include <linux/regmap.h>
> @@ -29,12 +31,102 @@ static struct gpio_keys_platform_data bd71828_powerkey_data = {
> .name = "bd71828-pwrkey",
> };
>
> -static const struct resource rtc_irqs[] = {
> +static const struct resource bd71815_rtc_irqs[] = {
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_RTC0, "bd71815-rtc-alm-0"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_RTC1, "bd71815-rtc-alm-1"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_RTC2, "bd71815-rtc-alm-2"),
> +};
> +
> +static const struct resource bd71828_rtc_irqs[] = {
> DEFINE_RES_IRQ_NAMED(BD71828_INT_RTC0, "bd71828-rtc-alm-0"),
> DEFINE_RES_IRQ_NAMED(BD71828_INT_RTC1, "bd71828-rtc-alm-1"),
> DEFINE_RES_IRQ_NAMED(BD71828_INT_RTC2, "bd71828-rtc-alm-2"),
> };
>
> +static struct resource bd71815_power_irqs[] = {
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_DCIN_RMV, "bd71815-dcin-rmv"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_CLPS_OUT, "bd71815-clps-out"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_CLPS_IN, "bd71815-clps-in"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_DCIN_OVP_RES, "bd71815-dcin-ovp-res"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_DCIN_OVP_DET, "bd71815-dcin-ovp-det"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_DCIN_MON_RES, "bd71815-dcin-mon-res"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_DCIN_MON_DET, "bd71815-dcin-mon-det"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_VSYS_UV_RES, "bd71815-vsys-uv-res"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_VSYS_UV_DET, "bd71815-vsys-uv-det"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_VSYS_LOW_RES, "bd71815-vsys-low-res"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_VSYS_LOW_DET, "bd71815-vsys-low-det"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_VSYS_MON_RES, "bd71815-vsys-mon-res"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_VSYS_MON_RES, "bd71815-vsys-mon-det"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_CHG_WDG_TEMP, "bd71815-chg-wdg-temp"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_CHG_WDG_TIME, "bd71815-chg-wdg"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_CHG_RECHARGE_RES, "bd71815-rechg-res"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_CHG_RECHARGE_DET, "bd71815-rechg-det"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_CHG_RANGED_TEMP_TRANSITION,
> + "bd71815-ranged-temp-transit"),

The new line limit is 100. Feel free to run these out.

> + DEFINE_RES_IRQ_NAMED(BD71815_INT_CHG_STATE_TRANSITION,
> + "bd71815-chg-state-change"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_BAT_TEMP_NORMAL,
> + "bd71815-bat-temp-normal"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_BAT_TEMP_ERANGE,
> + "bd71815-bat-temp-erange"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_BAT_REMOVED, "bd71815-bat-rmv"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_BAT_DETECTED, "bd71815-bat-det"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_THERM_REMOVED, "bd71815-therm-rmv"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_THERM_DETECTED, "bd71815-therm-det"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_BAT_DEAD, "bd71815-bat-dead"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_BAT_SHORTC_RES,
> + "bd71815-bat-short-res"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_BAT_SHORTC_DET,
> + "bd71815-bat-short-det"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_BAT_LOW_VOLT_RES,
> + "bd71815-bat-low-res"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_BAT_LOW_VOLT_DET,
> + "bd71815-bat-low-det"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_BAT_OVER_VOLT_RES,
> + "bd71815-bat-over-res"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_BAT_OVER_VOLT_DET,
> + "bd71815-bat-over-det"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_BAT_MON_RES, "bd71815-bat-mon-res"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_BAT_MON_DET, "bd71815-bat-mon-det"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_BAT_CC_MON1, "bd71815-bat-cc-mon1"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_BAT_CC_MON2, "bd71815-bat-cc-mon2"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_BAT_CC_MON3, "bd71815-bat-cc-mon3"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_BAT_OVER_CURR_1_RES,
> + "bd71815-bat-oc1-res"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_BAT_OVER_CURR_1_DET,
> + "bd71815-bat-oc1-det"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_BAT_OVER_CURR_2_RES,
> + "bd71815-bat-oc2-res"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_BAT_OVER_CURR_2_DET,
> + "bd71815-bat-oc2-det"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_BAT_OVER_CURR_3_RES,
> + "bd71815-bat-oc3-res"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_BAT_OVER_CURR_3_DET,
> + "bd71815-bat-oc3-det"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_TEMP_BAT_LOW_RES,
> + "bd71815-bat-low-res"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_TEMP_BAT_LOW_DET,
> + "bd71815-bat-low-det"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_TEMP_BAT_HI_RES, "bd71815-bat-hi-res"),
> + DEFINE_RES_IRQ_NAMED(BD71815_INT_TEMP_BAT_HI_DET, "bd71815-bat-hi-det"),
> +};

[...]

> +static const struct regmap_irq bd71815_irqs[] = {

[...]

> + REGMAP_IRQ_REG(BD71815_INT_TEMP_CHIP_OVER_VF_DET, 10,
> + BD71815_INT_TEMP_CHIP_OVER_VF_DET_MASK),

As above.

> + /* RTC Alarm */
> + REGMAP_IRQ_REG(BD71815_INT_RTC0, 11, BD71815_INT_RTC0_MASK),
> + REGMAP_IRQ_REG(BD71815_INT_RTC1, 11, BD71815_INT_RTC1_MASK),
> + REGMAP_IRQ_REG(BD71815_INT_RTC2, 11, BD71815_INT_RTC2_MASK),
> +};

[...]

> +static int set_clk_mode(struct device *dev, struct regmap *regmap,
> + int clkmode_reg)
> +{
> + int ret;
> + const char *mode;
> +
> + ret = of_property_read_string_index(dev->of_node, "rohm,clkout-mode", 0,
> + &mode);
> + if (ret) {
> + if (ret == -EINVAL)
> + return 0;
> + return ret;
> + }
> + if (!strncmp(mode, "open-drain", 10)) {
> + dev_dbg(dev, "configuring clk32kout as open-drain");

Do you *really* need these?

> + ret = regmap_update_bits(regmap, clkmode_reg, OUT32K_MODE,
> + OUT32K_MODE_OPEN_DRAIN);
> + } else if (!strncmp(mode, "cmos", 4)) {
> + dev_dbg(dev, "configuring clk32kout as cmos");
> + ret = regmap_update_bits(regmap, clkmode_reg, OUT32K_MODE,
> + OUT32K_MODE_CMOS);
> + } else {
> + dev_err(dev, "bad clk32kout mode configuration");
> + return -EINVAL;
> + }
> + return ret;
> +}
> +
> static int bd71828_i2c_probe(struct i2c_client *i2c)
> {
> - struct rohm_regmap_dev *chip;
> struct regmap_irq_chip_data *irq_data;
> int ret;
> + struct regmap *regmap;
> + const struct regmap_config *regmap_config;
> + struct regmap_irq_chip *irqchip;
> + unsigned int chip_type;
> + struct mfd_cell *mfd;
> + int cells;
> + int button_irq;
> + int clkmode_reg;
>
> if (!i2c->irq) {
> dev_err(&i2c->dev, "No IRQ configured\n");
> return -EINVAL;
> }
>
> - chip = devm_kzalloc(&i2c->dev, sizeof(*chip), GFP_KERNEL);
> - if (!chip)
> - return -ENOMEM;
> -
> - dev_set_drvdata(&i2c->dev, chip);
> + chip_type = (unsigned int)(uintptr_t)
> + of_device_get_match_data(&i2c->dev);
> + switch (chip_type) {
> + case ROHM_CHIP_TYPE_BD71828:
> + mfd = bd71828_mfd_cells;
> + cells = ARRAY_SIZE(bd71828_mfd_cells);
> + regmap_config = &bd71828_regmap;
> + irqchip = &bd71828_irq_chip;
> + clkmode_reg = BD71815_REG_OUT32K;
> + button_irq = BD71828_INT_SHORTPUSH;
> + dev_info(&i2c->dev, "BD71828 found\n");
> + break;
> + case ROHM_CHIP_TYPE_BD71815:
> + mfd = bd71815_mfd_cells;
> + cells = ARRAY_SIZE(bd71815_mfd_cells);
> + regmap_config = &bd71815_regmap;
> + irqchip = &bd71815_irq_chip;
> + clkmode_reg = BD71828_REG_OUT32K;
> + /*
> + * If BD71817 support is needed we should be able to handle it
> + * with proper DT configs + BD71815 drivers + power-button.
> + * BD71815 data-sheet does not list the power-button IRQ so we
> + * don't use it.
> + */
> + button_irq = 0;
> + dev_info(&i2c->dev, "BD71815 found\n");

Again, are these *really* useful to you and/or your users?

Besides, this device not *found* i.e. scanned/read and instantiated,
it has simply been matched from the local DTB. It can still be
wrong. You can probably omit them.

[...]

> diff --git a/include/linux/mfd/rohm-bd71815.h b/include/linux/mfd/rohm-bd71815.h
> new file mode 100644
> index 000000000000..8ee5874a5b73
> --- /dev/null
> +++ b/include/linux/mfd/rohm-bd71815.h
> @@ -0,0 +1,561 @@
> +/* SPDX-License-Identifier: GPL-2.0-or-later */
> +/*
> + * Copyright 2014 Embest Technology Co. Ltd. Inc.

Jeeze! Is this for the Amiga?

> + * Author: yanglsh@xxxxxxxxxxxxxxx
> + *
> + * 2020, 2021 Heavily modified by:

You should probably add a proper copyright.

> + * Matti Vaittinen <matti.vaittinen@xxxxxxxxxxxxxxxxx>
> + */
> +
> +#ifndef _MFD_BD71815_H
> +#define _MFD_BD71815_H
> +
> +#include <linux/regmap.h>

[...]

--
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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Next in thread: Matti Vaittinen: "Re: [PATCH v2 09/17] mfd: Support for ROHM BD71815 PMIC core"
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