1 /* SPDX-License-Identifier: GPL-2.0-only */
2
3 #include <stdint.h>
4 #include <console/console.h>
5 #include <device/device.h>
6 #include <device/smbus.h>
7
get_pbus_smbus(struct device * dev)8 struct bus *get_pbus_smbus(struct device *dev)
9 {
10 struct bus *const pbus = i2c_link(dev);
11 if (!pbus->dev->ops->ops_smbus_bus)
12 die("%s Cannot find SMBus bus operations", dev_path(dev));
13 return pbus;
14 }
15
16 #define CHECK_PRESENCE(x) \
17 if (!ops_smbus_bus(get_pbus_smbus(dev))->x) { \
18 printk(BIOS_ERR, "%s missing " #x "\n", \
19 dev_path(dev)); \
20 return -1; \
21 }
22
smbus_block_read(struct device * dev,u8 cmd,u8 bytes,u8 * buffer)23 int smbus_block_read(struct device *dev, u8 cmd, u8 bytes, u8 *buffer)
24 {
25 CHECK_PRESENCE(block_read);
26
27 return ops_smbus_bus(get_pbus_smbus(dev))->block_read(dev, cmd,
28 bytes, buffer);
29 }
30
smbus_block_write(struct device * dev,u8 cmd,u8 bytes,const u8 * buffer)31 int smbus_block_write(struct device *dev, u8 cmd, u8 bytes, const u8 *buffer)
32 {
33 CHECK_PRESENCE(block_write);
34
35 return ops_smbus_bus(get_pbus_smbus(dev))->block_write(dev, cmd,
36 bytes, buffer);
37 }
38