diff options
| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2021-02-09 14:19:27 +0300 |
|---|---|---|
| committer | Wolfram Sang <wsa@kernel.org> | 2021-02-12 13:11:04 +0300 |
| commit | b39ab96aa894e3f4a9a1cdfc070bd8ebefaeb9d8 (patch) | |
| tree | 942a3cc9d30798c64b161ed7ef2a9f29ca0d2613 /drivers/i2c/i2c-slave-testunit.c | |
| parent | bb3fe9ff5306d058af952f689f22448af286def8 (diff) | |
| download | linux-b39ab96aa894e3f4a9a1cdfc070bd8ebefaeb9d8.tar.xz | |
i2c: testunit: add support for block process calls
Devices offering SMBus block process calls are rare, so add it to the
testunit. This is also a good test case for testing proper
I2C_M_RECV_LEN flag handling of I2C bus masters emulating SMBus.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Diffstat (limited to 'drivers/i2c/i2c-slave-testunit.c')
| -rw-r--r-- | drivers/i2c/i2c-slave-testunit.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/i2c/i2c-slave-testunit.c b/drivers/i2c/i2c-slave-testunit.c index c288102de324..56dae08dfd48 100644 --- a/drivers/i2c/i2c-slave-testunit.c +++ b/drivers/i2c/i2c-slave-testunit.c @@ -19,6 +19,7 @@ enum testunit_cmds { TU_CMD_READ_BYTES = 1, /* save 0 for ABORT, RESET or similar */ TU_CMD_HOST_NOTIFY, + TU_CMD_SMBUS_BLOCK_PROC_CALL, TU_NUM_CMDS }; @@ -88,6 +89,8 @@ static int i2c_slave_testunit_slave_cb(struct i2c_client *client, enum i2c_slave_event event, u8 *val) { struct testunit_data *tu = i2c_get_clientdata(client); + bool is_proc_call = tu->reg_idx == 3 && tu->regs[TU_REG_DATAL] == 1 && + tu->regs[TU_REG_CMD] == TU_CMD_SMBUS_BLOCK_PROC_CALL; int ret = 0; switch (event) { @@ -118,12 +121,17 @@ static int i2c_slave_testunit_slave_cb(struct i2c_client *client, fallthrough; case I2C_SLAVE_WRITE_REQUESTED: + memset(tu->regs, 0, TU_NUM_REGS); tu->reg_idx = 0; break; - case I2C_SLAVE_READ_REQUESTED: case I2C_SLAVE_READ_PROCESSED: - *val = TU_CUR_VERSION; + if (is_proc_call && tu->regs[TU_REG_DATAH]) + tu->regs[TU_REG_DATAH]--; + fallthrough; + + case I2C_SLAVE_READ_REQUESTED: + *val = is_proc_call ? tu->regs[TU_REG_DATAH] : TU_CUR_VERSION; break; } |