nv-tegra-mirror/linux-nv-oot
1
0
Fork 0
mirror of git://nv-tegra.nvidia.com/linux-nv-oot.git synced 2025-12-22 17:25:35 +03:00
Code Issues Packages Projects Releases Wiki Activity

virtual i2c mux support for other Hawks

Browse Source 
* Add virtual i2c bus support for 2nd, 3rd
& 4th Hawks to read/write EEPROM data
while streaming
* Move MAX96712 function declarations to
a proper header file instead of using extern
declarations in .c files. This fixes checkpatch
warnings about externs in .c files and improves
code organization

Bug 4807682

Change-Id: Ie4e7f7b9adc6fe6255a517cd5f076afdc754384a
Signed-off-by: Praveen AC <pac@nvidia.com>
(cherry picked from commit 57dc20f5a8)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3365540
Reviewed-by: Narendra Kondapalli <nkondapalli@nvidia.com>
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-by: Ankur Pawar <ankurp@nvidia.com>
This commit is contained in:
Praveen AC
2024-09-09 18:58:23 +00:00
committed by Jon Hunter
parent 5de17f758a
commit 459e781d79
2 changed files with 59 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/media/i2c/max96712.h Normal file
View File

@@ -0,0 +1,15 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/* SPDX-FileCopyrightText: Copyright (c) 2023-2025 NVIDIA CORPORATION & AFFILIATES.
* All rights reserved.
*/
/*
* MAX96712 deserializer driver header
*/
#ifndef __MAX96712_H__
#define __MAX96712_H__
int max96712_write_reg_Dser(int slaveAddr, int channel, u16 addr, u8 val);
int max96712_read_reg_Dser(int slaveAddr, int channel, u16 addr, unsigned int *val);
#endif /* __MAX96712_H__ */

67
drivers/media/i2c/virtual_i2c_mux.c
View File

@@ -1,5 +1,5 @@
// SPDX-License-Identifier: GPL-2.0-only
// SPDX-FileCopyrightText: Copyright (c) 2023-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
// SPDX-FileCopyrightText: Copyright (c) 2023-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
/*
* virtual_i2c_mux.c - virtual i2c mux driver for P3762 & P3783 GMSL boards.
*/
@@ -13,25 +13,47 @@
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/version.h>
#include "max96712.h"
#define DESER_A (0)
#define ENABLE_IMU (0xFE)
#define ENABLE_CC1 (0xFE)
#define ENABLE_CC2 (0xFB)
#define ENABLE_CC3 (0xEF)
#define ENABLE_CC4 (0xBF)
#define ENABLE_ALL_CC (0xAA)
#define DESER_ADDR (0x52)
#define DESER_CC_REG (0x0003)
extern int max96712_write_reg_Dser(int slaveAddr,int channel,
u16 addr, u8 val);
static int virtual_i2c_mux_select(struct i2c_mux_core *muxc, u32 chan)
{
int ret = 0;
/* Do select 1st channel, to access IMUs from 1st Hawk */
if (!chan) {
ret = max96712_write_reg_Dser(DESER_ADDR, DESER_A, DESER_CC_REG, ENABLE_IMU);
switch (chan) {
case 0:
ret = max96712_write_reg_Dser(DESER_ADDR, DESER_A, DESER_CC_REG, ENABLE_CC1);
if (ret)
pr_err("%s: Failed to do i2c address trans for IMUs\n",__func__);
pr_err("%s: Failed to do i2c address trans for CC1\n", __func__);
break;
case 1:
ret = max96712_write_reg_Dser(DESER_ADDR, DESER_A, DESER_CC_REG, ENABLE_CC2);
if (ret)
pr_err("%s: Failed to do i2c address trans for CC2\n", __func__);
break;
case 2:
ret = max96712_write_reg_Dser(DESER_ADDR, DESER_A, DESER_CC_REG, ENABLE_CC3);
if (ret)
pr_err("%s: Failed to do i2c address trans for CC3\n", __func__);
break;
case 3:
ret = max96712_write_reg_Dser(DESER_ADDR, DESER_A, DESER_CC_REG, ENABLE_CC4);
if (ret)
pr_err("%s: Failed to do i2c address trans for CC4\n", __func__);
break;
default:
pr_err("%s: No channels matched chan = %d\n", __func__, chan);
ret = -EINVAL;
break;
}
return ret;
}
@@ -41,11 +63,10 @@ static int virtual_i2c_mux_deselect(struct i2c_mux_core *muxc, u32 chan)
int ret = 0;
/* Enable all control channels */
if (!chan) {
ret = max96712_write_reg_Dser(DESER_ADDR, DESER_A, DESER_CC_REG, ENABLE_ALL_CC);
if (ret)
pr_err("%s: Failed to do i2c address trans for IMUs\n",__func__);
}
ret = max96712_write_reg_Dser(DESER_ADDR, DESER_A, DESER_CC_REG, ENABLE_ALL_CC);
if (ret)
pr_err("%s: Failed to do i2c address trans for IMUs\n", __func__);
return ret;
}
@@ -53,7 +74,7 @@ static int virtual_i2c_mux_deselect(struct i2c_mux_core *muxc, u32 chan)
static int virtual_i2c_mux_probe(struct i2c_client *client)
#else
static int virtual_i2c_mux_probe(struct i2c_client *client,
const struct i2c_device_id *id)
const struct i2c_device_id *id)
#endif
{
struct device *dev = &client->dev;
@@ -75,7 +96,7 @@ static int virtual_i2c_mux_probe(struct i2c_client *client,
"failed to get i2c parent adapter\n");
children = of_get_child_count(np);
dev_info(dev, "No of children = %d\n",children);
dev_info(dev, "No of children = %d\n", children);
muxc = i2c_mux_alloc(parent, dev, children, 0, I2C_MUX_LOCKED,
virtual_i2c_mux_select, virtual_i2c_mux_deselect);
@@ -86,7 +107,7 @@ static int virtual_i2c_mux_probe(struct i2c_client *client,
i2c_set_clientdata(client, muxc);
for (chan = 0; chan < children; chan++) {
pr_info("%s: chan = %d\n",__func__, chan);
pr_info("%s: chan = %d\n", __func__, chan);
#if defined(NV_I2C_MUX_ADD_ADAPTER_HAS_NO_CLASS_ARG)
ret = i2c_mux_add_adapter(muxc, 0, chan);
#else
@@ -96,7 +117,7 @@ static int virtual_i2c_mux_probe(struct i2c_client *client,
goto err_children;
}
dev_info(dev, "Probde is successful!!! \n");
dev_info(dev, "Probde is successful!!!\n");
dev_info(dev, "%d-port mux on %s adapter\n", children, parent->name);
return 0;
@@ -126,14 +147,14 @@ static void virtual_i2c_mux_remove(struct i2c_client *client)
}
static const struct of_device_id virtual_i2c_mux_of_match[] = {
{ .compatible = "nvidia,virtual-i2c-mux", },
{},
{ .compatible = "nvidia,virtual-i2c-mux", },
{},
};
MODULE_DEVICE_TABLE(of, virtual_i2c_mux_of_match);
static const struct i2c_device_id virt_i2c_mux_id[] = {
{ "virtual-i2c-mux", 0 },
{ },
{ "virtual-i2c-mux", 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, virt_i2c_mux_id);
@@ -143,8 +164,8 @@ static struct i2c_driver virtual_i2c_mux_driver = {
.id_table = virt_i2c_mux_id,
.driver = {
.name = "virtual-i2c-mux",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(virtual_i2c_mux_of_match),
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(virtual_i2c_mux_of_match),
},
};