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Tue, 10 Oct 2023 19:56:15 +0000 (GMT) Message-ID: <1edb46238b58360d4e045cfff4d7c0b9c681a997.camel@linux.vnet.ibm.com> Subject: Re: [PATCH v2] misc/pca9552: Fix for pca9552 not getting reset From: Miles Glenn To: =?ISO-8859-1?Q?C=E9dric?= Le Goater , qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org, =?ISO-8859-1?Q?C=E9dric?= Le Goater , andrew@codeconstruct.com.au, Joel Stanley Date: Tue, 10 Oct 2023 14:56:15 -0500 In-Reply-To: References: <20231005211046.3609577-1-milesg@linux.vnet.ibm.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.28.5 (3.28.5-18.el8) Mime-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: TobQDlLaFfFfotX4mi9XKGBZqNh4Ljmq X-Proofpoint-ORIG-GUID: 54x7kzynpUFS8Phh0h84raFit7xCyQ_P X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.980,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-10-10_16,2023-10-10_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 malwarescore=0 impostorscore=0 clxscore=1015 priorityscore=1501 bulkscore=0 mlxlogscore=999 mlxscore=0 spamscore=0 adultscore=0 phishscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2309180000 definitions=main-2310100154 Received-SPF: none client-ip=148.163.156.1; envelope-from=milesg@linux.vnet.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org 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 > > --- > > 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;