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Commit 375c1eca authored by Prudhvi Yarlagadda's avatar Prudhvi Yarlagadda
Browse files

slimbus: Add snapshot of slimbus driver 



This snapshot is taken as of msm-4.19 'commit <f08e34e48e72>
(Merge "defconfig: enable dcvs configs for bengal target")'.

Change-Id: I2f187a74814b1b04fa447a5664c5b170d075ffa4
Signed-off-by: default avatarPrudhvi Yarlagadda <pyarlaga@codeaurora.org>
parent 2cfd8943

drivers/of/Kconfig

+6 −0
Original line number Diff line number Diff line
@@ -99,6 +99,12 @@ config OF_RESERVED_MEM_CHECK 
config OF_RESOLVE

	bool



config OF_SLIMBUS

	def_tristate SLIMBUS

	depends on SLIMBUS

	help

	  OpenFirmware SLIMBUS accessors



config OF_OVERLAY

	bool "Device Tree overlays"

	select OF_DYNAMIC

drivers/of/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ obj-$(CONFIG_OF_UNITTEST) += unittest.o 
obj-$(CONFIG_OF_MDIO)	+= of_mdio.o

obj-$(CONFIG_OF_RESERVED_MEM) += of_reserved_mem.o

obj-$(CONFIG_OF_RESOLVE)  += resolver.o

obj-$(CONFIG_OF_SLIMBUS) += of_slimbus.o

obj-$(CONFIG_OF_OVERLAY) += overlay.o

obj-$(CONFIG_OF_NUMA) += of_numa.o

drivers/of/of_slimbus.c

0 → 100644
+85 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright (c) 2016-2019, The Linux Foundation. All rights reserved.

 */



/* OF helpers for SLIMbus */

#include <linux/slimbus/slimbus.h>

#include <linux/irq.h>

#include <linux/slab.h>

#include <linux/of.h>

#include <linux/of_irq.h>

#include <linux/of_slimbus.h>



int of_register_slim_devices(struct slim_controller *ctrl)

{

	struct device_node *node;

	struct slim_boardinfo *binfo = NULL;

	struct slim_boardinfo *temp;

	int n = 0;

	int ret = 0;



	if (!ctrl->dev.of_node)

		return -EINVAL;



	for_each_available_child_of_node(ctrl->dev.of_node, node) {

		struct property *prop;

		struct slim_device *slim;

		char *name;



		prop = of_find_property(node, "elemental-addr", NULL);

		if (!prop || prop->length != 6) {

			dev_err(&ctrl->dev, "of_slim: invalid E-addr\n");

			continue;

		}

		name = kzalloc(SLIMBUS_NAME_SIZE, GFP_KERNEL);

		if (!name) {

			ret = -ENOMEM;

			of_node_put(node);

			goto of_slim_err;

		}

		if (of_modalias_node(node, name, SLIMBUS_NAME_SIZE) < 0) {

			dev_err(&ctrl->dev, "of_slim: modalias failure on %s\n",

				node->full_name);

			kfree(name);

			continue;

		}

		slim = kzalloc(sizeof(struct slim_device), GFP_KERNEL);

		if (!slim) {

			ret = -ENOMEM;

			kfree(name);

			of_node_put(node);

			goto of_slim_err;

		}

		memcpy(slim->e_addr, prop->value, 6);



		temp = krealloc(binfo, (n + 1) * sizeof(struct slim_boardinfo),

					GFP_KERNEL);

		if (!temp) {

			kfree(name);

			kfree(slim);

			ret = -ENOMEM;

			of_node_put(node);

			goto of_slim_err;

		}

		binfo = temp;



		slim->dev.of_node = of_node_get(node);

		slim->name = (const char *)name;

		binfo[n].bus_num = ctrl->nr;

		binfo[n].slim_slave = slim;

		n++;

	}

	ret = slim_register_board_info(binfo, n);

	if (!ret)

		goto of_slim_ret;

of_slim_err:

	while (n-- > 0) {

		kfree(binfo[n].slim_slave->name);

		kfree(binfo[n].slim_slave);

	}

of_slim_ret:

	kfree(binfo);

	return ret;

}

EXPORT_SYMBOL(of_register_slim_devices);

drivers/slimbus/Kconfig

+23 −5
Original line number Diff line number Diff line
@@ -3,12 +3,12 @@ 
# SLIMbus driver configuration

#

menuconfig SLIMBUS

	tristate "SLIMbus support"

	bool "SLIMbus support"

	depends on HAS_IOMEM

	help

	  SLIMbus is standard interface between System-on-Chip and audio codec,

	  and other peripheral components in typical embedded systems.



	  If unsure, choose N.

	  Slimbus is standard interface between baseband and

	  application processors and peripheral components in mobile

	  terminals.



if SLIMBUS
@@ -32,4 +32,22 @@ config SLIM_QCOM_NGD_CTRL 
	  communicating with slave HW directly over the bus using messaging

	  interface, and communicating with master component residing on ADSP

	  for bandwidth and data-channel management.



config SLIMBUS_MSM_CTRL

	tristate "QTI SLIMbus Master Component"

	help

	  Select driver for Qualcomm Technologies, Inc. (QTI) Slimbus

	  Master Component. This driver is responsible for configuring

	  SLIMbus and performing bus administration, administration of

	  components on the bus and dynamic channel allocation.



config SLIMBUS_MSM_NGD

	tristate "QTI Slimbus Satellite Component"

	help

	  Select driver for Qualcomm Technologies, Inc. (QTI) Slimbus

	  Satellite Component. This is light-weight slimbus controller

	  driver responsible for communicating with slave HW directly over

	  the bus using messaging interface, and communicating with master

	  component residing on ADSP for bandwidth and data-channel

	  management.

endif

drivers/slimbus/Makefile

+4 −8
Original line number Diff line number Diff line
@@ -3,11 +3,7 @@ 
# Makefile for kernel SLIMbus framework.

#

obj-$(CONFIG_SLIMBUS)			+= slimbus.o

slimbus-y				:= core.o messaging.o sched.o stream.o



#Controllers

obj-$(CONFIG_SLIM_QCOM_CTRL)		+= slim-qcom-ctrl.o

slim-qcom-ctrl-y			:= qcom-ctrl.o



obj-$(CONFIG_SLIM_QCOM_NGD_CTRL)	+= slim-qcom-ngd-ctrl.o

slim-qcom-ngd-ctrl-y			:= qcom-ngd-ctrl.o
 
obj-$(CONFIG_SLIMBUS_MSM_CTRL)		+= slim-msm.o

slim-msm-y				:= slim-msm-ctrl.o

obj-$(CONFIG_SLIMBUS_MSM_NGD)		+= slim-msm.o

slim-msm-y				:= slim-msm-ngd.o