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i2c: Introduce common module to instantiate CCGx UCSI 

Introduce a common module to provide an API to instantiate UCSI device
for Cypress CCGx Type-C controller. Individual bus drivers need to select
this one on demand.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Andy Shevchenko 2022-01-05 16:19:31 +02:00 committed by Wolfram Sang
parent 9c02d4011e
commit 4ebf4987c0
4 changed files with 51 additions and 0 deletions
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7
drivers/i2c/busses/Kconfig
View File

@ -9,6 +9,13 @@ menu "I2C Hardware Bus support"
comment "PC SMBus host controller drivers"
depends on PCI
config I2C_CCGX_UCSI
tristate
help
A common module to provide an API to instantiate UCSI device
for Cypress CCGx Type-C controller. Individual bus drivers
need to select this one on demand.
config I2C_ALI1535
tristate "ALI 1535"
depends on PCI

3
drivers/i2c/busses/Makefile
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@ -6,6 +6,9 @@
# ACPI drivers
obj-$(CONFIG_I2C_SCMI) += i2c-scmi.o
# Auxiliary I2C/SMBus modules
obj-$(CONFIG_I2C_CCGX_UCSI) += i2c-ccgx-ucsi.o
# PC SMBus host controller drivers
obj-$(CONFIG_I2C_ALI1535) += i2c-ali1535.o
obj-$(CONFIG_I2C_ALI1563) += i2c-ali1563.o

30
drivers/i2c/busses/i2c-ccgx-ucsi.c Normal file
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@ -0,0 +1,30 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Instantiate UCSI device for Cypress CCGx Type-C controller.
* Derived from i2c-designware-pcidrv.c and i2c-nvidia-gpu.c.
*/
#include <linux/i2c.h>
#include <linux/export.h>
#include <linux/module.h>
#include <linux/string.h>
#include "i2c-ccgx-ucsi.h"
struct software_node;
struct i2c_client *i2c_new_ccgx_ucsi(struct i2c_adapter *adapter, int irq,
const struct software_node *swnode)
{
struct i2c_board_info info = {};
strscpy(info.type, "ccgx-ucsi", sizeof(info.type));
info.addr = 0x08;
info.irq = irq;
info.swnode = swnode;
return i2c_new_client_device(adapter, &info);
}
EXPORT_SYMBOL_GPL(i2c_new_ccgx_ucsi);
MODULE_LICENSE("GPL");

11
drivers/i2c/busses/i2c-ccgx-ucsi.h Normal file
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@ -0,0 +1,11 @@
/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef __I2C_CCGX_UCSI_H_
#define __I2C_CCGX_UCSI_H_
struct i2c_adapter;
struct i2c_client;
struct software_node;
struct i2c_client *i2c_new_ccgx_ucsi(struct i2c_adapter *adapter, int irq,
const struct software_node *swnode);
#endif /* __I2C_CCGX_UCSI_H_ */