linux-kernel - Re: [PATCH v2 2/6] MFD: TPS6594x: Add new PMIC device driver for TPS6594x chips

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Message-ID: <Yw5t4G6hbn+mSD8y@ubuntu>
Date:   Tue, 30 Aug 2022 13:09:14 -0700
From:   Matt Ranostay <mranostay@...com>
To:     Lee Jones <lee@...nel.org>
CC:     <nm@...com>, <j-keerthy@...com>, <linux-kernel@...r.kernel.org>,
        <linux-rtc@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 2/6] MFD: TPS6594x: Add new PMIC device driver for
 TPS6594x chips

On Fri, Aug 12, 2022 at 08:01:04AM +0100, Lee Jones wrote:
> On Thu, 11 Aug 2022, Matt Ranostay wrote:
> 
> > From: Keerthy <j-keerthy@...com>
> > 
> > The TPS6594x chip is a PMIC, and contains the following components:
> > 
> > - Regulators
> > - GPIO controller
> > - RTC
> > 
> > However initially only RTC is supported.
> > 
> > Signed-off-by: Keerthy <j-keerthy@...com>
> > Signed-off-by: Matt Ranostay <mranostay@...com>
> > ---
> >  drivers/mfd/Kconfig          |  14 ++++
> >  drivers/mfd/Makefile         |   1 +
> >  drivers/mfd/tps6594x.c       | 121 +++++++++++++++++++++++++++++++++++
> >  include/linux/mfd/tps6594x.h |  84 ++++++++++++++++++++++++
> >  4 files changed, 220 insertions(+)
> >  create mode 100644 drivers/mfd/tps6594x.c
> >  create mode 100644 include/linux/mfd/tps6594x.h
> > 
> > diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> > index abb58ab1a1a4..4845683ae1d0 100644
> > --- a/drivers/mfd/Kconfig
> > +++ b/drivers/mfd/Kconfig
> > @@ -1547,6 +1547,20 @@ config MFD_TI_LP873X
> >  	  This driver can also be built as a module. If so, the module
> >  	  will be called lp873x.
> >  
> > +config MFD_TPS6594X
> > +	tristate "TI TPS6594X Power Management IC"
> > +	depends on I2C && OF
> > +	select MFD_CORE
> > +	select REGMAP_I2C
> > +	help
> > +	  If you say yes here then you get support for the TPS6594X series of
> > +	  Power Management Integrated Circuits (PMIC).
> > +	  These include voltage regulators, RTS, configurable
> > +	  General Purpose Outputs (GPO) that are used in portable devices.
> > +
> > +	  This driver can also be built as a module. If so, the module
> > +	  will be called tps6594x.
> > +
> >  config MFD_TI_LP87565
> >  	tristate "TI LP87565 Power Management IC"
> >  	depends on I2C && OF
> > diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> > index 858cacf659d6..7ff6a8a57d55 100644
> > --- a/drivers/mfd/Makefile
> > +++ b/drivers/mfd/Makefile
> > @@ -105,6 +105,7 @@ obj-$(CONFIG_MFD_TPS65910)	+= tps65910.o
> >  obj-$(CONFIG_MFD_TPS65912)	+= tps65912-core.o
> >  obj-$(CONFIG_MFD_TPS65912_I2C)	+= tps65912-i2c.o
> >  obj-$(CONFIG_MFD_TPS65912_SPI)  += tps65912-spi.o
> > +obj-$(CONFIG_MFD_TPS6594X)	+= tps6594x.o
> >  obj-$(CONFIG_MENELAUS)		+= menelaus.o
> >  
> >  obj-$(CONFIG_TWL4030_CORE)	+= twl-core.o twl4030-irq.o twl6030-irq.o
> > diff --git a/drivers/mfd/tps6594x.c b/drivers/mfd/tps6594x.c
> > new file mode 100644
> > index 000000000000..ff265b91db3e
> > --- /dev/null
> > +++ b/drivers/mfd/tps6594x.c
> > @@ -0,0 +1,121 @@
> > +// SPDX-License-Identifier: GPL-2.0-or-later
> > +/*
> > + * Driver for tps6594x PMIC chips
> > + *
> > + * Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com/
> > + * Author: Keerthy <j-keerthy@...com>
> > + */
> > +
> > +#include <linux/of.h>
> > +#include <linux/of_device.h>
> > +#include <linux/mfd/core.h>
> > +#include <linux/mfd/tps6594x.h>
> > +#include <linux/module.h>
> > +#include <linux/i2c.h>
> > +#include <linux/regmap.h>
> > +
> > +static const struct regmap_config tps6594x_regmap_config = {
> > +	.reg_bits = 8,
> > +	.val_bits = 8,
> > +	.max_register = TPS6594X_REG_MAX,
> > +};
> > +
> > +static const struct mfd_cell tps6594x_cells[] = {
> > +	{ .name = "tps6594x-gpio" },
> > +	{ .name = "tps6594x-regulator" },
> > +	{ .name = "tps6594x-rtc" },
> > +};
> 
> Where are the device drivers for these?
>

They currently don't exist. Would these need to be merged/developed
before the acceptance of the mfd driver?

- Matt

> -- 
> Lee Jones [李琼斯]