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Date: Mon, 19 Oct 2015 11:03:52 -0500
From: "Andrew F. Davis" <afd@...com>
To: Lee Jones <lee.jones@...aro.org>
CC: Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
Mark Rutland <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>,
Mark Brown <broonie@...nel.org>,
Alexandre Courbot <gnurou@...il.com>,
Grygorii Strashko <grygorii.strashko@...com>,
<linux-gpio@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/4] mfd: tps65086: Add driver for the TPS65086 PMIC
On 10/19/2015 04:23 AM, Lee Jones wrote:
> On Fri, 16 Oct 2015, Andrew F. Davis wrote:
>
>> Add support for the TPS65912 device. It provides communication
>> through I2C and contains the following components:
>>
>> - Regulators
>> - Load switches
>> - GPO controller
>
> What's a GPO controller?
>
General Purpose Output, this controller only has output control, it's
listed in the data-sheet this way, and other drivers have used this term.
>> Signed-off-by: Andrew F. Davis <afd@...com>
>> ---
>> drivers/mfd/Kconfig | 13 ++++
>> drivers/mfd/Makefile | 1 +
>> drivers/mfd/tps65086.c | 145 +++++++++++++++++++++++++++++++++++++++++++
>> include/linux/mfd/tps65086.h | 120 +++++++++++++++++++++++++++++++++++
>> 4 files changed, 279 insertions(+)
>> create mode 100644 drivers/mfd/tps65086.c
>> create mode 100644 include/linux/mfd/tps65086.h
>>
>> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
>> index 99d6367..ab3b392 100644
>> --- a/drivers/mfd/Kconfig
>> +++ b/drivers/mfd/Kconfig
>> @@ -1093,6 +1093,19 @@ config TPS6507X
>> This driver can also be built as a module. If so, the module
>> will be called tps6507x.
>>
>> +config MFD_TPS65086
>> + tristate "TI TPS65086x Power Management chips"
>
> Use the full name:
>
> "TI TPS65086x Power Management Integrated Chips (PMICs)"
>
>> + select REGMAP
>> + select REGMAP_IRQ
>> + select REGMAP_I2C
>> + depends on I2C
>
> REGMAP_I2C already depends on I2C.
>
So if I force REGMAP_I2C to =y without depending on I2C then couldn't
REGMAP_I2C get selected without I2C enabled? Selecting doesn't force
the selected item's dependencies still right?
>> + depends on OF || COMPILE_TEST
>> + help
>> + If you say yes here you get support for the TPS65086 series of
>> + Power Management chips.
>
> I'd remove the line break.
>
>> + These include voltage regulators, GPO and other features
>
> GPIO?
>
>> + that are often used in portable devices.
>
> This is meant to be a 'help', so instead of staying "and some other
> stuff", please list them.
>
This seems to be what other devices do, I'll change it to something
else then.
>> config TPS65911_COMPARATOR
>> tristate
>>
>> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
>> index a59e3fc..7adb902 100644
>> --- a/drivers/mfd/Makefile
>> +++ b/drivers/mfd/Makefile
>> @@ -66,6 +66,7 @@ obj-$(CONFIG_MFD_WM8994) += wm8994-core.o wm8994-irq.o wm8994-regmap.o
>> obj-$(CONFIG_TPS6105X) += tps6105x.o
>> obj-$(CONFIG_TPS65010) += tps65010.o
>> obj-$(CONFIG_TPS6507X) += tps6507x.o
>> +obj-$(CONFIG_MFD_TPS65086) += tps65086.o
>> obj-$(CONFIG_MFD_TPS65217) += tps65217.o
>> obj-$(CONFIG_MFD_TPS65218) += tps65218.o
>> obj-$(CONFIG_MFD_TPS65910) += tps65910.o
>> diff --git a/drivers/mfd/tps65086.c b/drivers/mfd/tps65086.c
>> new file mode 100644
>> index 0000000..be6d678
>> --- /dev/null
>> +++ b/drivers/mfd/tps65086.c
>> @@ -0,0 +1,145 @@
>> +/*
>> + * Driver for TI TPS65086x PMICs
>
> I'd suggest removing the driver part. We know it's a driver.
>
Again this is what almost every other driver does, I'm not sure how
else to describe this file without using the word driver.
>> + * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
>> + *
>> + * Author: Andrew F. Davis <afd@...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 TPS65912 driver
>> + */
>> +
>> +#include <linux/i2c.h>
>> +#include <linux/interrupt.h>
>> +#include <linux/module.h>
>> +#include <linux/of_device.h>
>> +
>> +#include <linux/mfd/tps65086.h>
>> +
>> +static const struct regmap_range tps65086_yes_ranges[] = {
>> + regmap_reg_range(TPS65086_IRQ, TPS65086_IRQ),
>> + regmap_reg_range(TPS65086_PMICSTAT, TPS65086_SHUTDNSRC),
>> + regmap_reg_range(TPS65086_GPOCTRL, TPS65086_GPOCTRL),
>> + regmap_reg_range(TPS65086_PG_STATUS1, TPS65086_OC_STATUS),
>> +};
>> +
>> +static const struct regmap_access_table tps65086_volatile_table = {
>> + .yes_ranges = tps65086_yes_ranges,
>> + .n_yes_ranges = ARRAY_SIZE(tps65086_yes_ranges),
>> +};
>> +
>> +static const struct regmap_config tps65086_regmap_config = {
>> + .reg_bits = 8,
>> + .val_bits = 8,
>> + .cache_type = REGCACHE_RBTREE,
>> + .volatile_table = &tps65086_volatile_table,
>> +};
>> +
>> +static const struct regmap_irq tps65086_irqs[] = {
>> + REGMAP_IRQ_REG(TPS65086_IRQ_DIETEMP, 0, TPS65086_IRQ_DIETEMP_MASK),
>> + REGMAP_IRQ_REG(TPS65086_IRQ_SHUTDN, 0, TPS65086_IRQ_SHUTDN_MASK),
>> + REGMAP_IRQ_REG(TPS65086_IRQ_FAULT, 0, TPS65086_IRQ_FAULT_MASK),
>> +};
>> +
>> +static struct regmap_irq_chip tps65086_irq_chip = {
>> + .name = "tps65086",
>> + .status_base = TPS65086_IRQ,
>> + .mask_base = TPS65086_IRQ_MASK,
>> + .ack_base = TPS65086_IRQ,
>> + .init_ack_masked = true,
>> + .num_regs = 1,
>> + .irqs = tps65086_irqs,
>> + .num_irqs = ARRAY_SIZE(tps65086_irqs),
>> +};
>> +
>> +static const struct of_device_id tps65086_of_match_table[] = {
>> + { .compatible = "ti,tps65086", },
>> + { /* sentinel */ }
>> +};
>> +
>> +static int tps65086_probe(struct i2c_client *client,
>> + const struct i2c_device_id *ids)
>> +{
>> + struct tps65086 *tps;
>> + unsigned int version;
>> + int ret;
>> +
>> + tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
>> + if (!tps)
>> + return -ENOMEM;
>> +
>> + i2c_set_clientdata(client, tps);
>> + tps->dev = &client->dev;
>> + tps->irq = client->irq;
>> +
>> + tps->regmap = devm_regmap_init_i2c(client, &tps65086_regmap_config);
>> + if (IS_ERR(tps->regmap)) {
>> + dev_err(tps->dev, "Failed to initialize register map\n");
>> + return PTR_ERR(tps->regmap);
>> + }
>> +
>> + ret = regmap_read(tps->regmap, TPS65086_DEVICEID, &version);
>> + if (ret < 0) {
>> + dev_err(tps->dev, "Failed to read revision register\n");
>> + return ret;
>> + }
>> +
>> + dev_info(tps->dev, "Device: TPS65086%01lX, OTP: %c, Rev: %ld\n",
>> + (version & TPS65086_DEVICEID_PART_MASK),
>> + (char)((version & TPS65086_DEVICEID_OTP_MASK) >> 4) + 'A',
>> + (version & TPS65086_DEVICEID_REV_MASK) >> 6);
>> +
>> + ret = regmap_add_irq_chip(tps->regmap, tps->irq, IRQF_ONESHOT, 0,
>> + &tps65086_irq_chip, &tps->irq_data);
>> + if (ret < 0) {
>
> if (ret)
>
ACK
>> + dev_err(tps->dev, "Failed to register IRQ chip\n");
>> + return ret;
>> + }
>> +
>> + ret = of_platform_populate(tps->dev->of_node, NULL, NULL, tps->dev);
>> + if (ret < 0) {
>
> if (ret)
>
ACK
>> + regmap_del_irq_chip(tps->irq, tps->irq_data);
>> + return ret;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int tps65086_remove(struct i2c_client *client)
>> +{
>> + struct tps65086 *tps = i2c_get_clientdata(client);
>> +
>> + regmap_del_irq_chip(tps->irq, tps->irq_data);
>> +
>> + return 0;
>> +}
>> +
>> +static const struct i2c_device_id tps65086_id_table[] = {
>> + { "tps65086", 0 },
>> + { /* sentinel */ },
>> +};
>> +MODULE_DEVICE_TABLE(i2c, tps65086_id_table);
>> +
>> +static struct i2c_driver tps65086_driver = {
>> + .driver = {
>> + .name = "tps65086",
>> + .of_match_table = tps65086_of_match_table,
>> + },
>> + .probe = tps65086_probe,
>> + .remove = tps65086_remove,
>> + .id_table = tps65086_id_table,
>> +};
>> +
>> +module_i2c_driver(tps65086_driver);
>> +
>> +MODULE_AUTHOR("Andrew F. Davis <afd@...com>");
>> +MODULE_DESCRIPTION("TPS65086x PMIC Driver");
>> +MODULE_LICENSE("GPL v2");
>> diff --git a/include/linux/mfd/tps65086.h b/include/linux/mfd/tps65086.h
>> new file mode 100644
>> index 0000000..2a9e9dd
>> --- /dev/null
>> +++ b/include/linux/mfd/tps65086.h
>> @@ -0,0 +1,120 @@
>> +/*
>> + * TI TPS65086x
>> + *
>> + * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
>> + *
>> + * Author: Andrew F. Davis <afd@...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 TPS65912 driver
>> + */
>> +
>> +#ifndef __LINUX_MFD_TPS65086_H
>> +#define __LINUX_MFD_TPS65086_H
>> +
>> +#include <linux/device.h>
>> +#include <linux/regmap.h>
>> +
>> +/* List of registers for TPS65086 */
>> +#define TPS65086_DEVICEID 0x01
>> +#define TPS65086_IRQ 0x02
>> +#define TPS65086_IRQ_MASK 0x03
>> +#define TPS65086_PMICSTAT 0x04
>> +#define TPS65086_SHUTDNSRC 0x05
>> +#define TPS65086_BUCK1CTRL 0x20
>> +#define TPS65086_BUCK2CTRL 0x21
>> +#define TPS65086_BUCK3DECAY 0x22
>> +#define TPS65086_BUCK3VID 0x23
>> +#define TPS65086_BUCK3SLPCTRL 0x24
>> +#define TPS65086_BUCK4CTRL 0x25
>> +#define TPS65086_BUCK5CTRL 0x26
>> +#define TPS65086_BUCK6CTRL 0x27
>> +#define TPS65086_LDOA2CTRL 0x28
>> +#define TPS65086_LDOA3CTRL 0x29
>> +#define TPS65086_DISCHCTRL1 0x40
>> +#define TPS65086_DISCHCTRL2 0x41
>> +#define TPS65086_DISCHCTRL3 0x42
>> +#define TPS65086_PG_DELAY1 0x43
>> +#define TPS65086_FORCESHUTDN 0x91
>> +#define TPS65086_BUCK1SLPCTRL 0x92
>> +#define TPS65086_BUCK2SLPCTRL 0x93
>> +#define TPS65086_BUCK4VID 0x94
>> +#define TPS65086_BUCK4SLPVID 0x95
>> +#define TPS65086_BUCK5VID 0x96
>> +#define TPS65086_BUCK5SLPVID 0x97
>> +#define TPS65086_BUCK6VID 0x98
>> +#define TPS65086_BUCK6SLPVID 0x99
>> +#define TPS65086_LDOA2VID 0x9A
>> +#define TPS65086_LDOA3VID 0x9B
>> +#define TPS65086_BUCK123CTRL 0x9C
>> +#define TPS65086_PG_DELAY2 0x9D
>> +#define TPS65086_PIN_EN_MASK1 0x9E
>> +#define TPS65086_PIN_EN_MASK2 0x9F
>> +#define TPS65086_SWVTT_EN 0x9F
>> +#define TPS65086_PIN_EN_OVR1 0xA0
>> +#define TPS65086_PIN_EN_OVR2 0xA1
>> +#define TPS65086_GPOCTRL 0xA1
>> +#define TPS65086_PWR_FAULT_MASK1 0xA2
>> +#define TPS65086_PWR_FAULT_MASK2 0xA3
>> +#define TPS65086_GPO1PG_CTRL1 0xA4
>> +#define TPS65086_GPO1PG_CTRL2 0xA5
>> +#define TPS65086_GPO4PG_CTRL1 0xA6
>> +#define TPS65086_GPO4PG_CTRL2 0xA7
>> +#define TPS65086_GPO2PG_CTRL1 0xA8
>> +#define TPS65086_GPO2PG_CTRL2 0xA9
>> +#define TPS65086_GPO3PG_CTRL1 0xAA
>> +#define TPS65086_GPO3PG_CTRL2 0xAB
>> +#define TPS65086_LDOA1CTRL 0xAE
>> +#define TPS65086_PG_STATUS1 0xB0
>> +#define TPS65086_PG_STATUS2 0xB1
>> +#define TPS65086_PWR_FAULT_STATUS1 0xB2
>> +#define TPS65086_PWR_FAULT_STATUS2 0xB3
>> +#define TPS65086_TEMPCRIT 0xB4
>> +#define TPS65086_TEMPHOT 0xB5
>> +#define TPS65086_OC_STATUS 0xB6
>> +
>> +/* IRQ Register field definitions */
>> +#define TPS65086_IRQ_DIETEMP_MASK BIT(0)
>> +#define TPS65086_IRQ_SHUTDN_MASK BIT(3)
>> +#define TPS65086_IRQ_FAULT_MASK BIT(7)
>> +
>> +/* DEVICEID Register field definitions */
>> +#define TPS65086_DEVICEID_PART_MASK GENMASK(3, 0)
>> +#define TPS65086_DEVICEID_OTP_MASK GENMASK(5, 4)
>> +#define TPS65086_DEVICEID_REV_MASK GENMASK(7, 6)
>> +
>> +/* VID Masks */
>> +#define BUCK_VID_MASK GENMASK(7, 1)
>> +#define VDOA1_VID_MASK GENMASK(4, 1)
>> +#define VDOA23_VID_MASK GENMASK(3, 0)
>> +
>> +/* Define the TPS65086 IRQ numbers */
>> +enum tps65086_irqs {
>> + TPS65086_IRQ_DIETEMP,
>> + TPS65086_IRQ_SHUTDN,
>> + TPS65086_IRQ_FAULT,
>> +};
>> +
>> +/*
>> + * struct tps65086 - state holder for the tps65086 driver
>> + *
>> + * Device data may be used to access the TPS65086 chip
>> + */
>> +struct tps65086 {
>> + struct device *dev;
>> + struct regmap *regmap;
>> +
>> + /* IRQ Data */
>> + int irq;
>> + struct regmap_irq_chip_data *irq_data;
>> +};
>> +
>> +#endif /* __LINUX_MFD_TPS65086_H */
>
--
Andrew F. Davis
--
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