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Commit 3a63e37c authored by Chris Lew's avatar Chris Lew Committed by Gerrit - the friendly Code Review server
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rpmsg: Introduce GLINK SPI driver 



Add support for the GLINK SPI driver to communicate to the codec
processor. This driver uses the wdsp spi interface to send and receive
messages on a SPI bus.

Change-Id: I50c0f0023d26e547afa9baf64d0715002ced7347
Signed-off-by: default avatarChris Lew <clew@codeaurora.org>
parent c9e61f28

drivers/rpmsg/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -50,6 +50,15 @@ config RPMSG_QCOM_GLINK_SPSS 
	  region with the remote proc by writing the smem descriptor location

	  and size into shared registers.



config RPMSG_QCOM_GLINK_SPI

	tristate "Qualcomm SPI Glink driver"

	help

	  Say y here to enable support for the GLINK SPI communication driver,

	  which provides support for using the GLINK communication protocol

	  over SPI. This transport performs marshaling of GLINK commands and

	  data to the appropriate SPI bus wire format and allows for GLINK

	  communication with remote subsystems that are external to the SoC.



config RPMSG_QCOM_SMD

	tristate "Qualcomm Shared Memory Driver (SMD)"

	depends on QCOM_SMEM

drivers/rpmsg/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -5,5 +5,6 @@ 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

obj-$(CONFIG_RPMSG_QCOM_GLINK_SPSS) += qcom_glink_spss.o

obj-$(CONFIG_RPMSG_QCOM_GLINK_SPI) += qcom_glink_spi.o

obj-$(CONFIG_RPMSG_QCOM_SMD)	+= qcom_smd.o

obj-$(CONFIG_RPMSG_VIRTIO)	+= virtio_rpmsg_bus.o

drivers/rpmsg/qcom_glink_spi.c

0 → 100644
+2473 −0

File added.

Preview size limit exceeded, changes collapsed.

include/linux/rpmsg/qcom_glink.h

+21 −0
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ 
#include <linux/device.h>



struct qcom_glink;

struct glink_spi;



#if IS_ENABLED(CONFIG_RPMSG_QCOM_GLINK_SMEM)
@@ -44,4 +45,24 @@ static inline void qcom_glink_spss_unregister(struct qcom_glink *glink) {} 


#endif





#if IS_ENABLED(CONFIG_RPMSG_QCOM_GLINK_SPI)



struct glink_spi *qcom_glink_spi_register(struct device *parent,

					       struct device_node *node);

void qcom_glink_spi_unregister(struct glink_spi *glink);



#else



static inline struct glink_spi *

qcom_glink_spi_register(struct device *parent, struct device_node *node)

{

	return NULL;

}



static inline void qcom_glink_spi_unregister(struct glink_spi *glink) {}



#endif





#endif