| Message ID | 20220124121009.108649-6-alistair@alistair23.me (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add support for the silergy,sy7636a | expand |
Hi Alistair, On Mon, Jan 24, 2022 at 1:25 PM Alistair Francis <alistair@alistair23.me> wrote: > This is a multi-function device to interface with the sy7636a > EPD PMIC chip from Silergy. > > Signed-off-by: Alistair Francis <alistair@alistair23.me> > Acked-by: Guenter Roeck <linux@roeck-us.net> Thanks for your patch, which is now commit de34a40532507814 ("hwmon: sy7636a: Add temperature driver for sy7636a") in mfd/for-mfd-next. > --- a/drivers/hwmon/Kconfig > +++ b/drivers/hwmon/Kconfig > @@ -1672,6 +1672,15 @@ config SENSORS_SIS5595 > This driver can also be built as a module. If so, the module > will be called sis5595. > > +config SENSORS_SY7636A > + tristate "Silergy SY7636A" > + help > + If you say yes here you get support for the thermistor readout of > + the Silergy SY7636A PMIC. As this is an i2c mfd device, you do need a dependency on MFD and I2C, or some other symbol, unless compile-testing? > + > + This driver can also be built as a module. If so, the module > + will be called sy7636a-hwmon. > + Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
On Tue, Mar 8, 2022 at 9:21 PM Geert Uytterhoeven <geert@linux-m68k.org> wrote: > > Hi Alistair, > > On Mon, Jan 24, 2022 at 1:25 PM Alistair Francis <alistair@alistair23.me> wrote: > > This is a multi-function device to interface with the sy7636a > > EPD PMIC chip from Silergy. > > > > Signed-off-by: Alistair Francis <alistair@alistair23.me> > > Acked-by: Guenter Roeck <linux@roeck-us.net> > > Thanks for your patch, which is now commit de34a40532507814 ("hwmon: > sy7636a: Add temperature driver for sy7636a") in mfd/for-mfd-next. > > > --- a/drivers/hwmon/Kconfig > > +++ b/drivers/hwmon/Kconfig > > @@ -1672,6 +1672,15 @@ config SENSORS_SIS5595 > > This driver can also be built as a module. If so, the module > > will be called sis5595. > > > > +config SENSORS_SY7636A > > + tristate "Silergy SY7636A" > > + help > > + If you say yes here you get support for the thermistor readout of > > + the Silergy SY7636A PMIC. > > As this is an i2c mfd device, you do need a dependency on MFD and I2C, > or some other symbol, unless compile-testing? It doesn't depend on either to build though. It can be built independently. Alistair > > > + > > + This driver can also be built as a module. If so, the module > > + will be called sy7636a-hwmon. > > + > > Gr{oetje,eeting}s, > > Geert > > -- > Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org > > In personal conversations with technical people, I call myself a hacker. But > when I'm talking to journalists I just say "programmer" or something like that. > -- Linus Torvalds
Hi Alistair, On Mon, Mar 21, 2022 at 8:35 AM Alistair Francis <alistair23@gmail.com> wrote: > On Tue, Mar 8, 2022 at 9:21 PM Geert Uytterhoeven <geert@linux-m68k.org> wrote: > > On Mon, Jan 24, 2022 at 1:25 PM Alistair Francis <alistair@alistair23.me> wrote: > > > This is a multi-function device to interface with the sy7636a > > > EPD PMIC chip from Silergy. > > > > > > Signed-off-by: Alistair Francis <alistair@alistair23.me> > > > Acked-by: Guenter Roeck <linux@roeck-us.net> > > > > Thanks for your patch, which is now commit de34a40532507814 ("hwmon: > > sy7636a: Add temperature driver for sy7636a") in mfd/for-mfd-next. > > > > > --- a/drivers/hwmon/Kconfig > > > +++ b/drivers/hwmon/Kconfig > > > @@ -1672,6 +1672,15 @@ config SENSORS_SIS5595 > > > This driver can also be built as a module. If so, the module > > > will be called sis5595. > > > > > > +config SENSORS_SY7636A > > > + tristate "Silergy SY7636A" > > > + help > > > + If you say yes here you get support for the thermistor readout of > > > + the Silergy SY7636A PMIC. > > > > As this is an i2c mfd device, you do need a dependency on MFD and I2C, > > or some other symbol, unless compile-testing? > > It doesn't depend on either to build though. It can be built independently. That is true. But do you think all users configuring their kernel should be asked about all (thousands) of config symbols for drivers that can be built, but won't work or are irrelevant otherwise? Please read https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/kbuild/kconfig-language.rst#n541 Thanks! Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index df20022c741f..6e0906ef5d25 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -185,6 +185,7 @@ Hardware Monitoring Kernel Drivers smsc47m1 sparx5-temp stpddc60 + sy7636a-hwmon tc654 tc74 thmc50 diff --git a/Documentation/hwmon/sy7636a-hwmon.rst b/Documentation/hwmon/sy7636a-hwmon.rst new file mode 100644 index 000000000000..5612079397d5 --- /dev/null +++ b/Documentation/hwmon/sy7636a-hwmon.rst @@ -0,0 +1,26 @@ +.. SPDX-License-Identifier: GPL-2.0-or-later + +Kernel driver sy7636a-hwmon +========================= + +Supported chips: + + * Silergy SY7636A PMIC + + +Description +----------- + +This driver adds hardware temperature reading support for +the Silergy SY7636A PMIC. + +The following sensors are supported + + * Temperature + - SoC on-die temperature in milli-degree C + +sysfs-Interface +--------------- + +temp0_input + - SoC on-die temperature (milli-degree C) diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 8df25f1079ba..aa5785e657a4 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -1672,6 +1672,15 @@ config SENSORS_SIS5595 This driver can also be built as a module. If so, the module will be called sis5595. +config SENSORS_SY7636A + tristate "Silergy SY7636A" + help + If you say yes here you get support for the thermistor readout of + the Silergy SY7636A PMIC. + + This driver can also be built as a module. If so, the module + will be called sy7636a-hwmon. + config SENSORS_DME1737 tristate "SMSC DME1737, SCH311x and compatibles" depends on I2C && !PPC diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index 185f946d698b..fe54a3dfdb03 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -186,6 +186,7 @@ obj-$(CONFIG_SENSORS_SMSC47M1) += smsc47m1.o obj-$(CONFIG_SENSORS_SMSC47M192)+= smsc47m192.o obj-$(CONFIG_SENSORS_SPARX5) += sparx5-temp.o obj-$(CONFIG_SENSORS_STTS751) += stts751.o +obj-$(CONFIG_SENSORS_SY7636A) += sy7636a-hwmon.o obj-$(CONFIG_SENSORS_AMC6821) += amc6821.o obj-$(CONFIG_SENSORS_TC74) += tc74.o obj-$(CONFIG_SENSORS_THMC50) += thmc50.o diff --git a/drivers/hwmon/sy7636a-hwmon.c b/drivers/hwmon/sy7636a-hwmon.c new file mode 100644 index 000000000000..6dd9c2a0f0e0 --- /dev/null +++ b/drivers/hwmon/sy7636a-hwmon.c @@ -0,0 +1,106 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Functions to access SY3686A power management chip temperature + * + * Copyright (C) 2021 reMarkable AS - http://www.remarkable.com/ + * + * Authors: Lars Ivar Miljeteig <lars.ivar.miljeteig@remarkable.com> + * Alistair Francis <alistair@alistair23.me> + */ + +#include <linux/err.h> +#include <linux/hwmon.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/regulator/machine.h> + +#include <linux/mfd/sy7636a.h> + +static int sy7636a_read(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long *temp) +{ + struct regmap *regmap = dev_get_drvdata(dev); + int ret, reg_val; + + ret = regmap_read(regmap, + SY7636A_REG_TERMISTOR_READOUT, ®_val); + if (ret) + return ret; + + *temp = reg_val * 1000; + + return 0; +} + +static umode_t sy7636a_is_visible(const void *data, + enum hwmon_sensor_types type, + u32 attr, int channel) +{ + if (type != hwmon_temp) + return 0; + + if (attr != hwmon_temp_input) + return 0; + + return 0444; +} + +static const struct hwmon_ops sy7636a_hwmon_ops = { + .is_visible = sy7636a_is_visible, + .read = sy7636a_read, +}; + +static const struct hwmon_channel_info *sy7636a_info[] = { + HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ), + HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT), + NULL +}; + +static const struct hwmon_chip_info sy7636a_chip_info = { + .ops = &sy7636a_hwmon_ops, + .info = sy7636a_info, +}; + +static int sy7636a_sensor_probe(struct platform_device *pdev) +{ + struct regmap *regmap = dev_get_regmap(pdev->dev.parent, NULL); + struct regulator *regulator; + struct device *hwmon_dev; + int err; + + if (!regmap) + return -EPROBE_DEFER; + + regulator = devm_regulator_get(&pdev->dev, "vcom"); + if (IS_ERR(regulator)) + return PTR_ERR(regulator); + + err = regulator_enable(regulator); + if (err) + return err; + + hwmon_dev = devm_hwmon_device_register_with_info(&pdev->dev, + "sy7636a_temperature", regmap, + &sy7636a_chip_info, NULL); + + if (IS_ERR(hwmon_dev)) { + err = PTR_ERR(hwmon_dev); + dev_err(&pdev->dev, "Unable to register hwmon device, returned %d\n", err); + return err; + } + + return 0; +} + +static struct platform_driver sy7636a_sensor_driver = { + .probe = sy7636a_sensor_probe, + .driver = { + .name = "sy7636a-temperature", + }, +}; +module_platform_driver(sy7636a_sensor_driver); + +MODULE_DESCRIPTION("SY7636A sensor driver"); +MODULE_LICENSE("GPL");