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[Qemu-devel] [PATCH 18/19] i2c:smbus_eeprom: Add a reset function to smb
From: |
minyard |
Subject: |
[Qemu-devel] [PATCH 18/19] i2c:smbus_eeprom: Add a reset function to smbus_eeprom |
Date: |
Wed, 20 Feb 2019 07:59:55 -0600 |
From: Corey Minyard <address@hidden>
Reset the contents to init data and reset the offset on a machine
reset.
Signed-off-by: Corey Minyard <address@hidden>
Reviewed-by: Philippe Mathieu-Daudé <address@hidden>
---
hw/i2c/smbus_eeprom.c | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)
diff --git a/hw/i2c/smbus_eeprom.c b/hw/i2c/smbus_eeprom.c
index c0a0c4d501..44887b4a27 100644
--- a/hw/i2c/smbus_eeprom.c
+++ b/hw/i2c/smbus_eeprom.c
@@ -106,7 +106,17 @@ static const VMStateDescription vmstate_smbus_eeprom = {
}
};
-static void smbus_eeprom_realize(DeviceState *dev, Error **errp)
+/*
+ * Reset the EEPROM contents to the initial state on a reset. This
+ * isn't really how an EEPROM works, of course, but the general
+ * principle of QEMU is to restore function on reset to what it would
+ * be if QEMU was stopped and started.
+ *
+ * The proper thing to do would be to have a backing blockdev to hold
+ * the contents and restore that on startup, and not do this on reset.
+ * But until that time, act as if we had been stopped and restarted.
+ */
+static void smbus_eeprom_reset(DeviceState *dev)
{
SMBusEEPROMDevice *eeprom = SMBUS_EEPROM(dev);
@@ -114,6 +124,11 @@ static void smbus_eeprom_realize(DeviceState *dev, Error
**errp)
eeprom->offset = 0;
}
+static void smbus_eeprom_realize(DeviceState *dev, Error **errp)
+{
+ smbus_eeprom_reset(dev);
+}
+
static Property smbus_eeprom_properties[] = {
DEFINE_PROP_PTR("data", SMBusEEPROMDevice, init_data),
DEFINE_PROP_END_OF_LIST(),
@@ -125,6 +140,7 @@ static void smbus_eeprom_class_initfn(ObjectClass *klass,
void *data)
SMBusDeviceClass *sc = SMBUS_DEVICE_CLASS(klass);
dc->realize = smbus_eeprom_realize;
+ dc->reset = smbus_eeprom_reset;
sc->receive_byte = eeprom_receive_byte;
sc->write_data = eeprom_write_data;
dc->props = smbus_eeprom_properties;
--
2.17.1
- [Qemu-devel] [PATCH 05/19] i2c:smbus: Correct the working of quick commands, (continued)
- [Qemu-devel] [PATCH 05/19] i2c:smbus: Correct the working of quick commands, minyard, 2019/02/20
- [Qemu-devel] [PATCH 17/19] i2c:smbus_eeprom: Add vmstate handling to the smbus eeprom, minyard, 2019/02/20
- [Qemu-devel] [PATCH 11/19] i2c:pm_smbus: Fix pm_smbus handling of I2C block read, minyard, 2019/02/20
- [Qemu-devel] [PATCH 03/19] arm:i2c: Don't mask return from i2c_recv(), minyard, 2019/02/20
- [Qemu-devel] [PATCH 09/19] i2c:smbus: Make white space in switch statements consistent, minyard, 2019/02/20
- [Qemu-devel] [PATCH 12/19] migration: Add a VMSTATE_BOOL_TEST() macro, minyard, 2019/02/20
- [Qemu-devel] [PATCH 16/19] i2c:smbus_eeprom: Add a size constant for the smbus_eeprom size, minyard, 2019/02/20
- [Qemu-devel] [PATCH 01/19] i2c: Split smbus into parts, minyard, 2019/02/20
- [Qemu-devel] [PATCH 02/19] i2c: have I2C receive operation return uint8_t, minyard, 2019/02/20
- [Qemu-devel] [PATCH 08/19] i2c:smbus_eeprom: Get rid of the quick command, minyard, 2019/02/20
- [Qemu-devel] [PATCH 18/19] i2c:smbus_eeprom: Add a reset function to smbus_eeprom,
minyard <=
- [Qemu-devel] [PATCH 13/19] i2c:pm_smbus: Fix state transfer, minyard, 2019/02/20
- [Qemu-devel] [PATCH 14/19] i2c:smbus_slave: Add an SMBus vmstate structure, minyard, 2019/02/20
- [Qemu-devel] [PATCH 06/19] i2c:smbus: Simplify write operation, minyard, 2019/02/20