| Message ID | 20231005211046.3609577-1-milesg@linux.vnet.ibm.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v2] misc/pca9552: Fix for pca9552 not getting reset | expand |
Hello Glenn, On 10/5/23 23:10, Glenn Miles wrote: > Testing of the pca9552 device on the powernv platform > showed that the reset method was not being called when > an instance of the device was realized. This was causing > the INPUT0/INPUT1 POR values to be incorrect. > > Fixed by overriding the parent pca955x_realize method with a > new pca9552_realize method which first calls > the parent pca955x_realize method followed by the > pca9552_reset function. > > Signed-off-by: Glenn Miles <milesg@linux.vnet.ibm.com> > --- > hw/misc/pca9552.c | 8 +++++++- > 1 file changed, 7 insertions(+), 1 deletion(-) > > diff --git a/hw/misc/pca9552.c b/hw/misc/pca9552.c > index fff19e369a..bc12dced7f 100644 > --- a/hw/misc/pca9552.c > +++ b/hw/misc/pca9552.c > @@ -384,6 +384,12 @@ static void pca955x_realize(DeviceState *dev, Error **errp) > qdev_init_gpio_out(dev, s->gpio, k->pin_count); > } > > +static void pca9552_realize(DeviceState *dev, Error **errp) > +{ > + pca955x_realize(dev, errp); > + pca9552_reset(dev); > +} This looks wrong. You need both handlers, a realize and a reset. Thanks, C. > + > static Property pca955x_properties[] = { > DEFINE_PROP_STRING("description", PCA955xState, description), > DEFINE_PROP_END_OF_LIST(), > @@ -416,7 +422,7 @@ static void pca9552_class_init(ObjectClass *oc, void *data) > DeviceClass *dc = DEVICE_CLASS(oc); > PCA955xClass *pc = PCA955X_CLASS(oc); > > - dc->reset = pca9552_reset; > + dc->realize = pca9552_realize; > dc->vmsd = &pca9552_vmstate; > pc->max_reg = PCA9552_LS3; > pc->pin_count = 16;
On Mon, 2023-10-09 at 23:06 +0200, Cédric Le Goater wrote: > Hello Glenn, > > On 10/5/23 23:10, Glenn Miles wrote: > > Testing of the pca9552 device on the powernv platform > > showed that the reset method was not being called when > > an instance of the device was realized. This was causing > > the INPUT0/INPUT1 POR values to be incorrect. > > > > Fixed by overriding the parent pca955x_realize method with a > > new pca9552_realize method which first calls > > the parent pca955x_realize method followed by the > > pca9552_reset function. > > > > Signed-off-by: Glenn Miles <milesg@linux.vnet.ibm.com> > > --- > > hw/misc/pca9552.c | 8 +++++++- > > 1 file changed, 7 insertions(+), 1 deletion(-) > > > > diff --git a/hw/misc/pca9552.c b/hw/misc/pca9552.c > > index fff19e369a..bc12dced7f 100644 > > --- a/hw/misc/pca9552.c > > +++ b/hw/misc/pca9552.c > > @@ -384,6 +384,12 @@ static void pca955x_realize(DeviceState *dev, > > Error **errp) > > qdev_init_gpio_out(dev, s->gpio, k->pin_count); > > } > > > > +static void pca9552_realize(DeviceState *dev, Error **errp) > > +{ > > + pca955x_realize(dev, errp); > > + pca9552_reset(dev); > > +} > > This looks wrong. You need both handlers, a realize and a reset. > > Thanks, > > C. > Ok, sent version 3. Thanks, Glenn > > > + > > static Property pca955x_properties[] = { > > DEFINE_PROP_STRING("description", PCA955xState, description), > > DEFINE_PROP_END_OF_LIST(), > > @@ -416,7 +422,7 @@ static void pca9552_class_init(ObjectClass *oc, > > void *data) > > DeviceClass *dc = DEVICE_CLASS(oc); > > PCA955xClass *pc = PCA955X_CLASS(oc); > > > > - dc->reset = pca9552_reset; > > + dc->realize = pca9552_realize; > > dc->vmsd = &pca9552_vmstate; > > pc->max_reg = PCA9552_LS3; > > pc->pin_count = 16;
diff --git a/hw/misc/pca9552.c b/hw/misc/pca9552.c index fff19e369a..bc12dced7f 100644 --- a/hw/misc/pca9552.c +++ b/hw/misc/pca9552.c @@ -384,6 +384,12 @@ static void pca955x_realize(DeviceState *dev, Error **errp) qdev_init_gpio_out(dev, s->gpio, k->pin_count); } +static void pca9552_realize(DeviceState *dev, Error **errp) +{ + pca955x_realize(dev, errp); + pca9552_reset(dev); +} + static Property pca955x_properties[] = { DEFINE_PROP_STRING("description", PCA955xState, description), DEFINE_PROP_END_OF_LIST(), @@ -416,7 +422,7 @@ static void pca9552_class_init(ObjectClass *oc, void *data) DeviceClass *dc = DEVICE_CLASS(oc); PCA955xClass *pc = PCA955X_CLASS(oc); - dc->reset = pca9552_reset; + dc->realize = pca9552_realize; dc->vmsd = &pca9552_vmstate; pc->max_reg = PCA9552_LS3; pc->pin_count = 16;
Testing of the pca9552 device on the powernv platform showed that the reset method was not being called when an instance of the device was realized. This was causing the INPUT0/INPUT1 POR values to be incorrect. Fixed by overriding the parent pca955x_realize method with a new pca9552_realize method which first calls the parent pca955x_realize method followed by the pca9552_reset function. Signed-off-by: Glenn Miles <milesg@linux.vnet.ibm.com> --- hw/misc/pca9552.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)