[PATCH 1/2] x86/Kconfig: move and modify CONFIG_I8K

From: Mateusz Jończyk
Date: Mon Feb 07 2022 - 13:40:46 EST


In Kconfig, inside the "Processor type and features" menu, there is
the CONFIG_I8K option: "Dell i8k legacy laptop support". This is
very confusing - enabling CONFIG_I8K is not required for the kernel to
support old Dell laptops. This option is specific to the dell-smm-hwmon
driver, which mostly exports some hardware monitoring information and
allows the user to change fan speed.

This option is misplaced, so move CONFIG_I8K to drivers/hwmon/Kconfig,
where it belongs.

Also, modify the dependency order - change
select SENSORS_DELL_SMM
to
depends on SENSORS_DELL_SMM
as it is just a configuration option of dell-smm-hwmon. This includes
changing the option type from tristate to bool. It was tristate because
it could select CONFIG_SENSORS_DELL_SMM=m .

When running "make oldconfig" on configurations with
CONFIG_SENSORS_DELL_SMM enabled , this change will result in an
additional question (which could be printed several times during
bisecting). I think that tidying up the configuration is worth it,
though.

Next patch tweaks the description of CONFIG_I8K.

Signed-off-by: Mateusz Jończyk <mat.jonczyk@xxxxx>
Cc: Pali Rohár <pali@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Jean Delvare <jdelvare@xxxxxxxx>
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
Cc: Hans de Goede <hdegoede@xxxxxxxxxx>
Cc: Mark Gross <markgross@xxxxxxxxxx>
---
arch/x86/Kconfig | 17 -----------------
drivers/hwmon/Kconfig | 15 +++++++++++++++
2 files changed, 15 insertions(+), 17 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 9f5bd41bf660..71d4ddd48c02 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1275,23 +1275,6 @@ config TOSHIBA
Say Y if you intend to run this kernel on a Toshiba portable.
Say N otherwise.

-config I8K
- tristate "Dell i8k legacy laptop support"
- depends on HWMON
- depends on PROC_FS
- select SENSORS_DELL_SMM
- help
- This option enables legacy /proc/i8k userspace interface in hwmon
- dell-smm-hwmon driver. Character file /proc/i8k reports bios version,
- temperature and allows controlling fan speeds of Dell laptops via
- System Management Mode. For old Dell laptops (like Dell Inspiron 8000)
- it reports also power and hotkey status. For fan speed control is
- needed userspace package i8kutils.
-
- Say Y if you intend to run this kernel on old Dell laptops or want to
- use userspace package i8kutils.
- Say N otherwise.
-
config X86_REBOOTFIXUPS
bool "Enable X86 board specific fixups for reboot"
depends on X86_32
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 8df25f1079ba..dd244aa747ad 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -505,6 +505,21 @@ config SENSORS_DELL_SMM
When option I8K is also enabled this driver provides legacy /proc/i8k
userspace interface for i8kutils package.

+config I8K
+ bool "Dell i8k legacy laptop support"
+ depends on SENSORS_DELL_SMM
+ help
+ This option enables legacy /proc/i8k userspace interface in hwmon
+ dell-smm-hwmon driver. Character file /proc/i8k reports bios version,
+ temperature and allows controlling fan speeds of Dell laptops via
+ System Management Mode. For old Dell laptops (like Dell Inspiron 8000)
+ it reports also power and hotkey status. For fan speed control is
+ needed userspace package i8kutils.
+
+ Say Y if you intend to run this kernel on old Dell laptops or want to
+ use userspace package i8kutils.
+ Say N otherwise.
+
config SENSORS_DA9052_ADC
tristate "Dialog DA9052/DA9053 ADC"
depends on PMIC_DA9052
--
2.25.1