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emul: emul_sbs_gauge read/write returns ret code

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To facilitate testing improper reads and writes on various registers,
enable the emul_sbs_gauge reg_read/write handlers to return custom exit
codes.

Signed-off-by: Aaron Massey <aaronmassey@google.com>
This commit is contained in:
Aaron Massey 2022-08-24 16:25:38 -06:00 committed by Carles Cufí
parent df42cf366e
commit 1cff6099f7
1 changed files with 12 additions and 10 deletions
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22
subsys/emul/i2c/emul_sbs_gauge.c
View file

@ -31,7 +31,7 @@ struct sbs_gauge_emul_cfg {
uint16_t addr;
};
static void reg_write(const struct emul *target, int reg, int val)
static int reg_write(const struct emul *target, int reg, int val)
{
ARG_UNUSED(target);
@ -39,13 +39,14 @@ static void reg_write(const struct emul *target, int reg, int val)
switch (reg) {
default:
LOG_INF("Unknown write %x", reg);
return -EIO;
}
return 0;
}
static int reg_read(const struct emul *target, int reg)
static int reg_read(const struct emul *target, int reg, int *val)
{
int val;
ARG_UNUSED(target);
switch (reg) {
@ -61,15 +62,15 @@ static int reg_read(const struct emul *target, int reg)
case SBS_GAUGE_CMD_CYCLE_COUNT:
case SBS_GAUGE_CMD_DESIGN_VOLTAGE:
/* Arbitrary stub value. */
val = 1;
*val = 1;
break;
default:
LOG_ERR("Unknown register 0x%x read", reg);
return -EIO;
}
LOG_INF("read 0x%x = 0x%x", reg, val);
LOG_INF("read 0x%x = 0x%x", reg, *val);
return val;
return 0;
}
static int sbs_gauge_emul_transfer_i2c(const struct emul *target, struct i2c_msg *msgs,
@ -79,6 +80,7 @@ static int sbs_gauge_emul_transfer_i2c(const struct emul *target, struct i2c_msg
struct sbs_gauge_emul_data *data;
unsigned int val;
int reg;
int rc;
data = target->data;
@ -102,7 +104,7 @@ static int sbs_gauge_emul_transfer_i2c(const struct emul *target, struct i2c_msg
if (msgs->flags & I2C_MSG_READ) {
switch (msgs->len - 1) {
case 1:
val = reg_read(target, reg);
rc = reg_read(target, reg, &val);
msgs->buf[0] = val;
break;
default:
@ -113,7 +115,7 @@ static int sbs_gauge_emul_transfer_i2c(const struct emul *target, struct i2c_msg
if (msgs->len != 1) {
LOG_ERR("Unexpected msg1 length %d", msgs->len);
}
reg_write(target, reg, msgs->buf[0]);
rc = reg_write(target, reg, msgs->buf[0]);
}
break;
default:
@ -121,7 +123,7 @@ static int sbs_gauge_emul_transfer_i2c(const struct emul *target, struct i2c_msg
return -EIO;
}
return 0;
return rc;
}
static const struct i2c_emul_api sbs_gauge_emul_api_i2c = {