Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-22 12:11:40 +00:00
Code Issues Packages Projects Releases Wiki Activity

i2c: npcm7xx: Allow 255 byte block SMBus transfers

Browse Source 
255 byte support has been tested on a npcm750 board

Signed-off-by: Matt Johnston <matt@codeconstruct.com.au>
Reviewed-by: Tali Perry <tali.perry1@gmail.com>
Reviewed-by: Patrick Venture <venture@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Matt Johnston 2021-11-15 10:49:24 +08:00 committed by David S. Miller
parent 1b2ba1f591
commit 3ef2de27a0
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/i2c/busses/i2c-npcm7xx.c
View File

@ -1399,7 +1399,7 @@ static void npcm_i2c_irq_master_handler_read(struct npcm_i2c *bus)
if (bus->read_block_use) {
/* first byte in block protocol is the size: */
data = npcm_i2c_rd_byte(bus);
data = clamp_val(data, 1, I2C_SMBUS_BLOCK_MAX);
data = clamp_val(data, 1, I2C_SMBUS_V3_BLOCK_MAX);
bus->rd_size = data + block_extra_bytes_size;
bus->rd_buf[bus->rd_ind++] = data;
@ -2187,6 +2187,7 @@ static u32 npcm_i2c_functionality(struct i2c_adapter *adap)
I2C_FUNC_SMBUS_EMUL |
I2C_FUNC_SMBUS_BLOCK_DATA |
I2C_FUNC_SMBUS_PEC |
I2C_FUNC_SMBUS_V3_BLOCK |
I2C_FUNC_SLAVE;
}