the general rpmsg drivers

MAINTAINERS

@@ -12102,6 +12102,13 @@ F:	Documentation/rpmsg.txt
 F:	include/linux/rpmsg.h
 F:	include/linux/rpmsg/
 
+RPMSG SERIAL DRIVERS
+M:	Xiang Xiao <xiaoxiang@xiaomi.com>
+L:	linux-remoteproc@vger.kernel.org
+L:	linux-serial@vger.kernel.org
+S:	Maintained
+F:	drivers/tty/rpmsg_tty.c
+
 RENESAS CLOCK DRIVERS
 M:	Geert Uytterhoeven <geert+renesas@glider.be>
 L:	linux-renesas-soc@vger.kernel.org

arch/arm/boot/dts/bcm2836-rpi-2-b.dts

@@ -4,6 +4,7 @@
 #include "bcm2835-rpi.dtsi"
 #include "bcm283x-rpi-smsc9514.dtsi"
 #include "bcm283x-rpi-usb-host.dtsi"
+//#include "bcm283x-rpi-sof.dtsi"
 
 / {
 	compatible = "raspberrypi,2-model-b", "brcm,bcm2836";

arch/arm/boot/dts/bcm283x-rpi-sof.dtsi

@@ -0,0 +1,17 @@
+// FIXME: which SPI bus is the card connected to?
+@spi {
+	status = "okay";
+
+	sue-creek: sof-sue-creek@0 {
+ reg = <0>;
+ compatible = "sof,spi-sue-creek";
+ // FIXME: frequency value
+ spi-max-frequency = <54000000>;
+ fw_filename = "intel/sof-spi.ri";
+ tplg_filename = "intel/sof-spi.tplg";
+ // FIXME: GPIO controller and IRQ number and sense
+ interrupt-parent = <&gpio1>;
+ interrupts = <9 IRQ_TYPE_EDGE_FALLING>;
+ irq-gpios = <&gpio1 9 GPIO_ACTIVE_HIGH>;
+	};
+};

drivers/acpi/blacklist.c

@@ -91,6 +91,7 @@ static int __init dmi_enable_rev_override(const struct dmi_system_id *d)
 
 static const struct dmi_system_id acpi_rev_dmi_table[] __initconst = {
 #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE
+#if !IS_ENABLED(CONFIG_SND_SOC_SOF_INTEL)
 	/*
  * DELL XPS 13 (2015) switches sound between HDA and I2S
  * depending on the ACPI _REV callback. If userspace supports
@@ -105,6 +106,7 @@ static const struct dmi_system_id acpi_rev_dmi_table[] __initconst = {
  DMI_MATCH(DMI_PRODUCT_NAME, "XPS 13 9343"),
  },
 	},
+#endif
 	{
  .callback = dmi_enable_rev_override,
  .ident = "DELL Precision 5520",

drivers/rpmsg/Kconfig

@@ -15,6 +15,57 @@ config RPMSG_CHAR
  in /dev. They make it possible for user-space programs to send and
  receive rpmsg packets.
 
+config RPMSG_CLK
+	tristate "RPMSG clock API redirection"
+	depends on COMMON_CLK
+	depends on RPMSG
+	help
+ Say Y here to redirect clock API from the remote processor.
+ With this driver, the remote processor could:
+ 1.Reuse the clock driver in the kernel side, or
+ 2.Form a hybrid(kernel plus RTOS) clock tree.
+
+config RPMSG_HOSTFS
+	bool "RPMSG fs API redirection"
+	depends on RPMSG
+	help
+ Say Y here to redirect fs API from the remote processor.
+ With this driver, the remote processor could:
+ 1.Save the tuning parameter during manufacture.
+ 2.Load the tuning parameter file in production.
+ 3.Save the dump to file for the tuning or debugging.
+ 4.Load the module from host dynamically.
+
+config RPMSG_RTC
+	tristate "RPMSG rtc API redirection"
+	depends on RPMSG
+	help
+ Say Y here to redirect rtc API from the remote processor.
+ With this driver, the remote processor could:
+ 1.Get the wall clock from kernel.
+ 2.Wake up from power off state.
+
+config RPMSG_SYSLOG
+	tristate "RPMSG syslog redirection"
+	depends on RPMSG
+	help
+ Say Y here to redirect the syslog/printf from remote processor into
+ the kernel log which is very useful to see what happen in the remote
+ side.
+
+ If the remote processor hang during bootup or panic at the runtime,
+ We can even cat /sys/kernel/debug/remoteproc/remoteprocX/trace0 to
+ get the last log which doesn't output yet.
+
+config RPMSG_USRSOCK
+	tristate "RPMSG socket API redirection"
+	depends on RPMSG
+	depends on NET
+	help
+ Say Y here to redirect sock API from the remote processor.
+ This driver could give the remote processor the capability
+ to access the internet through any host network interface.
+
 config RPMSG_QCOM_GLINK_NATIVE
 	tristate
 	select RPMSG

drivers/rpmsg/Makefile

@@ -1,6 +1,12 @@
 # SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_RPMSG) += rpmsg_core.o
 obj-$(CONFIG_RPMSG_CHAR)	+= rpmsg_char.o
+obj-$(CONFIG_RPMSG_CLK) += rpmsg_clk.o
+obj-$(CONFIG_RPMSG_HOSTFS)	+= rpmsg_hostfs.o
+CFLAGS_rpmsg_hostfs.o += -I$(srctree)
+obj-$(CONFIG_RPMSG_RTC) += rpmsg_rtc.o
+obj-$(CONFIG_RPMSG_SYSLOG)	+= rpmsg_syslog.o
+obj-$(CONFIG_RPMSG_USRSOCK)	+= rpmsg_usrsock.o
 obj-$(CONFIG_RPMSG_QCOM_GLINK_RPM) += qcom_glink_rpm.o
 obj-$(CONFIG_RPMSG_QCOM_GLINK_NATIVE) += qcom_glink_native.o
 obj-$(CONFIG_RPMSG_QCOM_GLINK_SMEM) += qcom_glink_smem.o