On Mon, May 02, 2022 at 06:31:56AM -0700, Guenter Roeck wrote: > On 5/2/22 04:00, Maxime Ripard wrote: > > Hi, > > > > On Thu, Apr 28, 2022 at 09:09:03PM +0000, Ruslan Zalata wrote: > > > Some Allwinner SoCs like A13, A20 or T2 are equipped with two-channel > > > low rate (6 bit) ADC that is often used for extra keys. There's a driver > > > for that already implementing standard input device, but it has these > > > limitations: 1) it cannot be used for general ADC data equisition, and > > > 2) it uses only one LRADC channel of two available. > > > > > > This driver provides basic hwmon interface to both channels of LRADC on > > > such Allwinner SoCs. > > > > > > Signed-off-by: Ruslan Zalata <rz@xxxxxxxxxxx> > > > --- > > > MAINTAINERS | 6 + > > > drivers/hwmon/Kconfig | 13 ++ > > > drivers/hwmon/Makefile | 1 + > > > drivers/hwmon/sun4i-lradc-hwmon.c | 280 ++++++++++++++++++++++++++++++ > > > 4 files changed, 300 insertions(+) > > > create mode 100644 drivers/hwmon/sun4i-lradc-hwmon.c > > > > > > diff --git a/MAINTAINERS b/MAINTAINERS > > > index 5e8c2f61176..d9c71e94133 100644 > > > --- a/MAINTAINERS > > > +++ b/MAINTAINERS > > > @@ -18861,6 +18861,12 @@ S: Maintained > > > F: Documentation/devicetree/bindings/input/allwinner,sun4i-a10-lradc-keys.yaml > > > F: drivers/input/keyboard/sun4i-lradc-keys.c > > > +SUN4I LOW RES ADC HWMON DRIVER > > > +M: Ruslan Zalata <rz@xxxxxxxxxxx> > > > +L: linux-hwmon@xxxxxxxxxxxxxxx > > > +S: Maintained > > > +F: drivers/hwmon/sun4i-lradc-hwmon.c > > > + > > > SUNDANCE NETWORK DRIVER > > > M: Denis Kirjanov <kda@xxxxxxxxxxxxxxxxx> > > > L: netdev@xxxxxxxxxxxxxxx > > > diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig > > > index 68a8a27ab3b..86776488a81 100644 > > > --- a/drivers/hwmon/Kconfig > > > +++ b/drivers/hwmon/Kconfig > > > @@ -1691,6 +1691,19 @@ config SENSORS_SIS5595 > > > This driver can also be built as a module. If so, the module > > > will be called sis5595. > > > +config SENSORS_SUN4I_LRADC > > > + tristate "Allwinner A13/A20 LRADC hwmon" > > > + depends on ARCH_SUNXI && !KEYBOARD_SUN4I_LRADC > > > + help > > > + Say y here to support the LRADC found in Allwinner A13/A20 SoCs. > > > + Both channels are supported. > > > + > > > + This driver can also be built as module. If so, the module > > > + will be called sun4i-lradc-hwmon. > > > + > > > + This option is not compatible with KEYBOARD_SUN4I_LRADC, one > > > + of these must be used at a time. > > > > How do you plan on enforcing that? > > > depends on ARCH_SUNXI && !KEYBOARD_SUN4I_LRADC Right, but that just doesn't fly for any generic distro / build-system. Maxime
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