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Sun, 17 Sep 2023 10:40:54 +0200 Message-ID: <0d2fe28c-27e0-c85a-9bcf-69ee712161d0@gmx.net> Date: Sun, 17 Sep 2023 10:40:53 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.15.1 Subject: Re: [PATCH v11 1/5] staging: vc04_services: vchiq_arm: Add new bus type and device type Content-Language: en-US To: Umang Jain , linux-staging@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-rpi-kernel@lists.infradead.org, linux-media@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Stefan Wahren , Greg Kroah-Hartman , Florian Fainelli , Adrien Thierry , Dan Carpenter , Dave Stevenson , Kieran Bingham , Laurent Pinchart References: <20230913195354.835884-1-umang.jain@ideasonboard.com> <20230913195354.835884-2-umang.jain@ideasonboard.com> From: Stefan Wahren In-Reply-To: <20230913195354.835884-2-umang.jain@ideasonboard.com> X-Provags-ID: V03:K1:zvPPD55M2TMVbfHIL+92M8ef1dUkI76EKA/GjkzhSVxi1IVwaTM plbYW/sKFu9eC9b05n1/k4P8s3xnoMwZpQfBM24mLJ94e5L91FR2ZBudm0Dcer3fMXlc5dI aJ49E2s8W6DcZPCe5Ag625xqE0BxIEifh9bBfXZrdP+fGNanlszB/tVUUBKl2JXLrnEkuxN EIiqHu8OFRoq5jGQqHSOQ== UI-OutboundReport: notjunk:1;M01:P0:KcpKe48VCG8=;Nc+5w/Kk/BkQNcIobhTdowkhD2V OZq4+vBZOD93+bXCsqyzfVl7N67i6dMY/GkFh5JYr6XbSeCYs5gR7lDuKjKDrVRrMI0zV6wTR 3UYwC4uX1vQkL55Acq8SrbEu2MMBlv4xTcsdaaEsu2h14MojKvdnYMayAE6CG75W9lW3kT9rn 9d0cPCGyeOVDd941mrUjBh4ZDL4RVP1lciNduWL8/q1LZUQXb+wwJgzcqXvfnvu8gNalK9rPw VnMZrgY3Gq+XuSevaRibKQyG58E5B6TWMuywV9iRk5cLLNNSyI0Blyc7AB80jpGMUz+9yX0sI D97BmD3+PA4A9tO37Qpf+CQg8u74l5xAkNEbyjQ/VwAr6G6cebfWc5gI4spdQccLQKsJQXdx5 eq7R7bSACikMI4sbRW76PDCz3P4qdJh+BUXCtOXgyT6DVqnMLX5fsKR/yK1ez0DwJFusFG1Q3 ckE2QmWFLhOx82OU7XI3C8c045dJQq9TClLBiu0nxECCJ0OrW95wv+bJSJpNXnhchkelCeRf2 D3SE/39N3ruPqymVrP8hNdc/21qX8d+veYad78HLe4j0MsDYCMqWZ4u7W1sVlFpkYfr+OTeW4 iOnkn3W35j1hgPObTkaPcCke0PKloMIrJuyC5bVmBMOlPZp62GQ0mCDE71YJ5h1F0O1P0PPNJ XLMTqArmJflSKMzOzE9ot5ICzpU068R70Rd/xt3ALCX/9ah+7+BsAT8DxrLOLD9nXxNQFoEr5 o1ShndfhjguFSe+KVOimO/UKe9znzwLV6DcxO862NxvFkMHDSo2+WjvYaQdD14X0vU8S24gZM Z9EGDwrWsXTerwGcvv5FD40e67j09shwcHxDSiBjBb/Far6t6iqDDOloIxvXNObTqMNJnvYjL kfqLdiX9Ys4gxKZKIZHfPRBkEuDrVnb2BSmHfL/7MWlvbUphQbcvo57iG3rrzzzpolYXdHv3p 1cRs6Q== X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230917_014104_117527_8B632EE9 X-CRM114-Status: GOOD ( 22.00 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Umang, Am 13.09.23 um 21:53 schrieb Umang Jain: > The devices that the vchiq interface registers (bcm2835-audio, > bcm2835-camera) are implemented and exposed by the VC04 firmware. > The device tree describes the VC04 itself with the resources required > to communicate with it through a mailbox interface. However, the > vchiq interface registers these devices as platform devices. This > also means the specific drivers for these devices are getting > registered as platform drivers. This is not correct and a blatant > abuse of platform device/driver. > > Add a new bus type, vchiq_bus_type and device type (struct vchiq_device) > which will be used to migrate child devices that the vchiq interfaces > creates/registers from the platform device/driver. > > Signed-off-by: Umang Jain > --- > drivers/staging/vc04_services/Makefile | 1 + > .../interface/vchiq_arm/vchiq_device.c | 111 ++++++++++++++++++ > .../interface/vchiq_arm/vchiq_device.h | 54 +++++++++ > 3 files changed, 166 insertions(+) > create mode 100644 drivers/staging/vc04_services/interface/vchiq_arm/vchiq_device.c sorry for not noticing this before, but there is already a vchiq_dev.c file which represent the character device. In order to avoid confusion how about renaming vchiq_device.c to vchiq_bus.c ? This also matches the function names better. > create mode 100644 drivers/staging/vc04_services/interface/vchiq_arm/vchiq_device.h > > diff --git a/drivers/staging/vc04_services/Makefile b/drivers/staging/vc04_services/Makefile > index 44794bdf6173..2d071e55e175 100644 > --- a/drivers/staging/vc04_services/Makefile > +++ b/drivers/staging/vc04_services/Makefile > @@ -5,6 +5,7 @@ vchiq-objs := \ > interface/vchiq_arm/vchiq_core.o \ > interface/vchiq_arm/vchiq_arm.o \ > interface/vchiq_arm/vchiq_debugfs.o \ > + interface/vchiq_arm/vchiq_device.o \ > interface/vchiq_arm/vchiq_connected.o \ > > ifdef CONFIG_VCHIQ_CDEV > diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_device.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_device.c > new file mode 100644 > index 000000000000..aad55c461905 > --- /dev/null > +++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_device.c > @@ -0,0 +1,111 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * vchiq_device.c - VCHIQ generic device and bus-type > + * > + * Copyright (c) 2023 Ideas On Board Oy > + */ > + > +#include > +#include > +#include > +#include > +#include > + > +#include "vchiq_device.h" > + > +static int vchiq_bus_type_match(struct device *dev, struct device_driver *drv) > +{ > + if (dev->bus == &vchiq_bus_type && > + strcmp(dev_name(dev), drv->name) == 0) > + return 1; > + > + return 0; > +} > + > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel