| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <CAKmqyKNs+Ebvd5MwtoKfKhNrMJVhTsBLjDhLXRuK8C+gs5MCcQ@mail.gmail.com>
Date: Thu, 17 Jun 2021 08:01:49 +1000
From: Alistair Francis <alistair23@...il.com>
To: Lee Jones <lee.jones@...aro.org>
Cc: Alistair Francis <alistair@...stair23.me>,
Rob Herring <robh+dt@...nel.org>, lgirdwood@...il.com,
Mark Brown <broonie@...nel.org>,
dl-linux-imx <linux-imx@....com>,
Sascha Hauer <kernel@...gutronix.de>,
devicetree <devicetree@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 2/5] mfd: sy7636a: Initial commit
On Wed, Jun 16, 2021 at 8:56 PM Lee Jones <lee.jones@...aro.org> wrote:
>
> On Tue, 15 Jun 2021, Alistair Francis wrote:
>
> > Initial support for the Silergy SY7636A Power Management chip.
> >
> > Signed-off-by: Alistair Francis <alistair@...stair23.me>
> > ---
> > drivers/mfd/Kconfig | 9 ++++
> > drivers/mfd/Makefile | 1 +
> > drivers/mfd/sy7636a.c | 82 +++++++++++++++++++++++++++++++++++++
> > include/linux/mfd/sy7636a.h | 47 +++++++++++++++++++++
> > 4 files changed, 139 insertions(+)
> > create mode 100644 drivers/mfd/sy7636a.c
> > create mode 100644 include/linux/mfd/sy7636a.h
> >
> > diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> > index 5c7f2b100191..7d6cf32b1549 100644
> > --- a/drivers/mfd/Kconfig
> > +++ b/drivers/mfd/Kconfig
> > @@ -1339,6 +1339,15 @@ config MFD_SYSCON
> > Select this option to enable accessing system control registers
> > via regmap.
> >
> > +config MFD_SY7636A
> > + tristate "Silergy SY7636A Power Management chip"
> > + select MFD_CORE
> > + select REGMAP_I2C
> > + depends on I2C
> > + help
> > + Select this option to enable support for the Silergy SY7636A
> > + Power Management chip.
> > +
> > config MFD_DAVINCI_VOICECODEC
> > tristate
> > select MFD_CORE
> > diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> > index 4f6d2b8a5f76..f95e1e725a95 100644
> > --- a/drivers/mfd/Makefile
> > +++ b/drivers/mfd/Makefile
> > @@ -265,6 +265,7 @@ obj-$(CONFIG_MFD_STMFX) += stmfx.o
> > obj-$(CONFIG_MFD_KHADAS_MCU) += khadas-mcu.o
> > obj-$(CONFIG_MFD_ACER_A500_EC) += acer-ec-a500.o
> >
> > +obj-$(CONFIG_MFD_SY7636A) += sy7636a.o
> > obj-$(CONFIG_SGI_MFD_IOC3) += ioc3.o
> > obj-$(CONFIG_MFD_SIMPLE_MFD_I2C) += simple-mfd-i2c.o
> > obj-$(CONFIG_MFD_INTEL_M10_BMC) += intel-m10-bmc.o
> > diff --git a/drivers/mfd/sy7636a.c b/drivers/mfd/sy7636a.c
> > new file mode 100644
> > index 000000000000..e08f29ea63f8
> > --- /dev/null
> > +++ b/drivers/mfd/sy7636a.c
> > @@ -0,0 +1,82 @@
> > +// SPDX-License-Identifier: GPL-2.0+
> > +//
>
> Only the SPDX with C++ style comments please.
>
> > +// MFD parent driver for SY7636A chip
>
> Drop the MFD part. It's a Linuxisum that doesn't really exist.
>
> > +// Copyright (C) 2021 reMarkable AS - http://www.remarkable.com/
> > +//
> > +// Authors: Lars Ivar Miljeteig <lars.ivar.miljeteig@...arkable.com>
> > +// Alistair Francis <alistair@...stair23.me>
> > +//
> > +// Based on the lp87565 driver by Keerthy <j-keerthy@...com>
> > +
> > +#include <linux/interrupt.h>
> > +#include <linux/mfd/core.h>
> > +#include <linux/module.h>
> > +#include <linux/of_device.h>
> > +
> > +#include <linux/mfd/sy7636a.h>
> > +
> > +static const struct regmap_config sy7636a_regmap_config = {
> > + .reg_bits = 8,
> > + .val_bits = 8,
> > +};
> > +
> > +static const struct mfd_cell sy7636a_cells[] = {
> > + { .name = "sy7636a-regulator", },
> > + { .name = "sy7636a-temperature", },
> > + { .name = "sy7636a-thermal", },
> > +};
> > +
> > +static const struct of_device_id of_sy7636a_match_table[] = {
> > + { .compatible = "silergy,sy7636a", },
> > + {}
> > +};
> > +MODULE_DEVICE_TABLE(of, of_sy7636a_match_table);
>
> Hold on. This driver doesn't really do anything. If you create OF
> nodes for all the sub-devices, you can use simple-mfd-i2c.
>
> Any reason you can't do that?
Just to confirm, you mean something like this?
diff --git a/arch/arm/boot/dts/imx7d-remarkable2.dts
b/arch/arm/boot/dts/imx7d-remarkable2.dts
index 9327d1c06c96..3577104b3853 100644
--- a/arch/arm/boot/dts/imx7d-remarkable2.dts
+++ b/arch/arm/boot/dts/imx7d-remarkable2.dts
@@ -382,6 +382,21 @@ epd_pmic: sy7636a@62 {
pinctrl-0 = <&pinctrl_epdpmic>;
#thermal-sensor-cells = <0>;
+ regulator@0 {
+ compatible = "sy7636a-regulator";
+ reg = <0>;
+ };
+
+ temperature@0 {
+ compatible = "sy7636a-temperature";
+ reg = <0>;
+ };
+
+ thermal@0 {
+ compatible = "sy7636a-thermal";
+ reg = <0>;
+ };
+
regulators {
compatible = "silergy,sy7636a-regulator";
diff --git a/drivers/mfd/simple-mfd-i2c.c b/drivers/mfd/simple-mfd-i2c.c
index 87f684cff9a1..622a05318cff 100644
--- a/drivers/mfd/simple-mfd-i2c.c
+++ b/drivers/mfd/simple-mfd-i2c.c
@@ -39,6 +39,7 @@ static int simple_mfd_i2c_probe(struct i2c_client *i2c)
static const struct of_device_id simple_mfd_i2c_of_match[] = {
{ .compatible = "kontron,sl28cpld" },
+ { .compatible = "silergy,sy7636a" },
{}
};
MODULE_DEVICE_TABLE(of, simple_mfd_i2c_of_match);
Alistair
>
> --
> Lee Jones [李琼斯]
> Senior Technical Lead - Developer Services
> Linaro.org │ Open source software for Arm SoCs
> Follow Linaro: Facebook | Twitter | Blog
Powered by blists - more mailing lists