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Date: Mon, 19 Oct 2015 10:23:36 +0100
From: Lee Jones <lee.jones@...aro.org>
To: "Andrew F. Davis" <afd@...com>
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 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?
> 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.
> + 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.
> 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.
> + * 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)
> + 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)
> + 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 */
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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