Merge remote-tracking branch 'local/ib-iio-scmi-5.12-rc2-take3' into togreg

Updated to use devm_iio_kfifo_buffer_setup() in place of now
removed devm_iio_kfifo_allocate()

Take3 branch because first 2 versions including wrong version of
patch.

MAINTAINERS

@@ -8691,6 +8691,12 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/iio/multiplexer/io-channel-mux.txt
 F:	drivers/iio/multiplexer/iio-mux.c
 
+IIO SCMI BASED DRIVER
+M:	Jyoti Bhayana <jbhayana@google.com>
+L:	linux-iio@vger.kernel.org
+S:	Maintained
+F:	drivers/iio/common/scmi_sensors/scmi_iio.c
+
 IIO SUBSYSTEM AND DRIVERS
 M:	Jonathan Cameron <jic23@kernel.org>
 R:	Lars-Peter Clausen <lars@metafoo.de>

drivers/firmware/arm_scmi/driver.c

@@ -741,7 +741,7 @@ static struct scmi_prot_devnames devnames[] = {
 	{ SCMI_PROTOCOL_SYSTEM, { "syspower" },},
 	{ SCMI_PROTOCOL_PERF,   { "cpufreq" },},
 	{ SCMI_PROTOCOL_CLOCK,  { "clocks" },},
-	{ SCMI_PROTOCOL_SENSOR, { "hwmon" },},
+	{ SCMI_PROTOCOL_SENSOR, { "hwmon", "iiodev" },},
 	{ SCMI_PROTOCOL_RESET,  { "reset" },},
 	{ SCMI_PROTOCOL_VOLTAGE,  { "regulator" },},
 };

drivers/iio/common/Kconfig

@@ -6,5 +6,6 @@
 source "drivers/iio/common/cros_ec_sensors/Kconfig"
 source "drivers/iio/common/hid-sensors/Kconfig"
 source "drivers/iio/common/ms_sensors/Kconfig"
+source "drivers/iio/common/scmi_sensors/Kconfig"
 source "drivers/iio/common/ssp_sensors/Kconfig"
 source "drivers/iio/common/st_sensors/Kconfig"

drivers/iio/common/Makefile

@@ -11,5 +11,6 @@
 obj-y += cros_ec_sensors/
 obj-y += hid-sensors/
 obj-y += ms_sensors/
+obj-y += scmi_sensors/
 obj-y += ssp_sensors/
 obj-y += st_sensors/

drivers/iio/common/scmi_sensors/Kconfig

+#
+# IIO over SCMI
+#
+# When adding new entries keep the list in alphabetical order
+
+menu "IIO SCMI Sensors"
+
+config IIO_SCMI
+	tristate "IIO SCMI"
+        depends on ARM_SCMI_PROTOCOL
+        select IIO_BUFFER
+        select IIO_KFIFO_BUF
+	help
+          Say yes here to build support for IIO SCMI Driver.
+          This provides ARM SCMI Protocol based IIO device.
+          This driver provides support for accelerometer and gyroscope
+          sensors available on SCMI based platforms.
+endmenu

drivers/iio/common/scmi_sensors/Makefile

+# SPDX - License - Identifier : GPL - 2.0 - only
+#
+# Makefile for the IIO over SCMI
+#
+obj-$(CONFIG_IIO_SCMI) += scmi_iio.o