mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-08-26 10:49:33 +00:00
Code Issues Releases Wiki Activity

i2c: ismt: Adding support for I2C_SMBUS_BLOCK_PROC_CALL

Browse source 
Expand the driver to support I2C_SMBUS_BLOCK_PROC_CALL since
HW supports it already.

Co-developed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mario Alejandro Posso Escobar <mario.posso.escobar@intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Mario Alejandro Posso Escobar 2020-11-16 17:32:45 +02:00 committed by Wolfram Sang
parent dc4e10b626
commit 5e9a97b1f4
1 changed files with 17 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

19
drivers/i2c/busses/i2c-ismt.c
View file

@ -53,7 +53,7 @@
* Features supported by this driver:
* Hardware PEC yes
* Block buffer yes
* Block process call transaction no
* Block process call transaction yes
* Slave mode no
*/
@ -332,7 +332,8 @@ static int ismt_process_desc(const struct ismt_desc *desc,
if (desc->status & ISMT_DESC_SCS) {
if (read_write == I2C_SMBUS_WRITE &&
size != I2C_SMBUS_PROC_CALL)
size != I2C_SMBUS_PROC_CALL &&
size != I2C_SMBUS_BLOCK_PROC_CALL)
return 0;
switch (size) {
@ -345,6 +346,7 @@ static int ismt_process_desc(const struct ismt_desc *desc,
data->word = dma_buffer[0] | (dma_buffer[1] << 8);
break;
case I2C_SMBUS_BLOCK_DATA:
case I2C_SMBUS_BLOCK_PROC_CALL:
if (desc->rxbytes != dma_buffer[0] + 1)
return -EMSGSIZE;
@ -518,6 +520,18 @@ static int ismt_access(struct i2c_adapter *adap, u16 addr,
}
break;
case I2C_SMBUS_BLOCK_PROC_CALL:
dev_dbg(dev, "I2C_SMBUS_BLOCK_PROC_CALL\n");
dma_size = I2C_SMBUS_BLOCK_MAX;
desc->tgtaddr_rw = ISMT_DESC_ADDR_RW(addr, 1);
desc->wr_len_cmd = data->block[0] + 1;
desc->rd_len = dma_size;
desc->control |= ISMT_DESC_BLK;
dma_direction = DMA_BIDIRECTIONAL;
dma_buffer[0] = command;
memcpy(&dma_buffer[1], &data->block[1], data->block[0]);
break;
case I2C_SMBUS_I2C_BLOCK_DATA:
/* Make sure the length is valid */
if (data->block[0] < 1)
@ -624,6 +638,7 @@ static u32 ismt_func(struct i2c_adapter *adap)
I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_WORD_DATA |
I2C_FUNC_SMBUS_PROC_CALL |
I2C_FUNC_SMBUS_BLOCK_PROC_CALL |
I2C_FUNC_SMBUS_BLOCK_DATA |
I2C_FUNC_SMBUS_I2C_BLOCK |
I2C_FUNC_SMBUS_PEC;