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hw/misc: add an EMC141{3,4} device model

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Largely inspired by the TMP421 temperature sensor, here is a model for
the EMC1413/EMC1414 temperature sensors.

Specs can be found here :
  20005274A.pdf

Signed-off-by: John Wang <wangzhiqiang.bj@bytedance.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20201122105134.671-1-wangzhiqiang.bj@bytedance.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This commit is contained in:
John Wang 2020-12-10 12:11:03 +01:00 • committed by Cédric Le Goater
parent 5e7b204dbf
commit 5e623f2bf1
7 changed files with 451 additions and 0 deletions
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81
tests/qtest/emc141x-test.c Normal file
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/*
* QTest testcase for the EMC141X temperature sensor
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "libqtest-single.h"
#include "libqos/qgraph.h"
#include "libqos/i2c.h"
#include "qapi/qmp/qdict.h"
#include "hw/misc/emc141x_regs.h"
#define EMC1414_TEST_ID "emc1414-test"
static int qmp_emc1414_get_temperature(const char *id)
{
QDict *response;
int ret;
response = qmp("{ 'execute': 'qom-get', 'arguments': { 'path': %s, "
"'property': 'temperature0' } }", id);
g_assert(qdict_haskey(response, "return"));
ret = qdict_get_int(response, "return");
qobject_unref(response);
return ret;
}
static void qmp_emc1414_set_temperature(const char *id, int value)
{
QDict *response;
response = qmp("{ 'execute': 'qom-set', 'arguments': { 'path': %s, "
"'property': 'temperature0', 'value': %d } }", id, value);
g_assert(qdict_haskey(response, "return"));
qobject_unref(response);
}
static void send_and_receive(void *obj, void *data, QGuestAllocator *alloc)
{
uint16_t value;
QI2CDevice *i2cdev = (QI2CDevice *)obj;
value = qmp_emc1414_get_temperature(EMC1414_TEST_ID);
g_assert_cmpuint(value, ==, 0);
value = i2c_get8(i2cdev, EMC141X_TEMP_HIGH0);
g_assert_cmphex(value, ==, 0);
/* The default max value is 85C, 0x55=85 */
value = i2c_get8(i2cdev, EMC141X_TEMP_MAX_HIGH0);
g_assert_cmphex(value, ==, 0x55);
value = i2c_get8(i2cdev, EMC141X_TEMP_MIN_HIGH0);
g_assert_cmphex(value, ==, 0);
/* 3000mc = 30C */
qmp_emc1414_set_temperature(EMC1414_TEST_ID, 30000);
value = qmp_emc1414_get_temperature(EMC1414_TEST_ID);
g_assert_cmpuint(value, ==, 30000);
value = i2c_get8(i2cdev, EMC141X_TEMP_HIGH0);
g_assert_cmphex(value, ==, 30);
}
static void emc1414_register_nodes(void)
{
QOSGraphEdgeOptions opts = {
.extra_device_opts = "id=" EMC1414_TEST_ID ",address=0x70"
};
add_qi2c_address(&opts, &(QI2CAddress) { 0x70 });
qos_node_create_driver("emc1414", i2c_device_create);
qos_node_consumes("emc1414", "i2c-bus", &opts);
qos_add_test("tx-rx", "emc1414", send_and_receive, NULL);
}
libqos_init(emc1414_register_nodes);