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Sat, 4 Nov 2023 14:47:21 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.101.107]) by APP4 (Coremail) with SMTP id gCh0CgDnfd3z6EVlglQtEw--.50758S8; Sat, 04 Nov 2023 14:47:21 +0800 (CST) From: Zhang Xiaoxu To: zhangxiaoxu5@huawei.com, weiyongjun1@huawei.com, broonie@kernel.org, rostedt@goodmis.org, mingo@redhat.com, frowand.list@gmail.com, linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 -next 4/5] spi: mockup: Add speed and flags attribute support Date: Sat, 4 Nov 2023 14:46:49 +0800 Message-Id: <20231104064650.972687-5-zhangxiaoxu@huaweicloud.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231104064650.972687-1-zhangxiaoxu@huaweicloud.com> References: <20231104064650.972687-1-zhangxiaoxu@huaweicloud.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: gCh0CgDnfd3z6EVlglQtEw--.50758S8 X-Coremail-Antispam: 1UD129KBjvJXoWxCF18Kw1xCw4DJF4fZr1UJrb_yoWrJF43pF WUAFy5t3y8JFn8WF43J3yku345Arn5KrWUGa4akr1Fk3s8KrykX3Z7JF15tan5JFWDCF4j vFWIvF40kF4Ivr7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUvEb4IE77IF4wAFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k2 6cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUAV Cq3wA2048vs2IY020Ec7CjxVAFwI0_Xr0E3s1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0 rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVWDJVCq3wA2z4x0Y4vE2Ix0cI8IcVCY1x0267 AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E 14v26rxl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7 xfMcIj6xIIjxv20xvE14v26r1Y6r17McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Y z7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41l42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7 v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF 1VAY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Gr0_Xr1lIx AIcVC0I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI 42IY6I8E87Iv67AKxVW8JVWxJwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWI evJa73UjIFyTuYvjxUrCJmUUUUU X-CM-SenderInfo: x2kd0wp0ld053x6k3tpzhluzxrxghudrp/ Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Zhang Xiaoxu This enable configure the spi speed and flags through configfs: echo 40000 > /sys/kernel/config/spi-mockup/spi0/min_speed echo 25000000 > /sys/kernel/config/spi-mockup/spi0/max_speed echo 0 > /sys/kernel/config/spi-mockup/spi0/flags echo 8 > /sys/kernel/config/spi-mockup/spi0/num_cs Then enable the device can use the special config: echo 1 > /sys/kernel/config/spi-mockup/spi0/enable Signed-off-by: Zhang Xiaoxu --- drivers/spi/spi-mockup.c | 55 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) diff --git a/drivers/spi/spi-mockup.c b/drivers/spi/spi-mockup.c index b449a2b7cdd4..06848504d144 100644 --- a/drivers/spi/spi-mockup.c +++ b/drivers/spi/spi-mockup.c @@ -207,11 +207,19 @@ static int spi_mockup_transfer(struct spi_controller = *ctrl, return ret; } =20 +struct spi_mockup_priv_data { + u32 min_speed; + u32 max_speed; + u16 flags; + u16 num_cs; +}; + static int spi_mockup_probe(struct platform_device *pdev) { int ret; struct mockup_spi *mock; struct spi_controller *ctrl; + struct spi_mockup_priv_data *data; =20 ctrl =3D spi_alloc_host(&pdev->dev, sizeof(struct mockup_spi)); if (!ctrl) { @@ -228,6 +236,14 @@ static int spi_mockup_probe(struct platform_device *pd= ev) ctrl->bus_num =3D pdev->id; ctrl->transfer_one_message =3D spi_mockup_transfer; =20 + data =3D dev_get_platdata(&pdev->dev); + if (data) { + ctrl->min_speed_hz =3D data->min_speed; + ctrl->max_speed_hz =3D data->max_speed; + ctrl->flags =3D data->flags; + ctrl->num_chipselect =3D data->num_cs; + } + mock =3D spi_controller_get_devdata(ctrl); mutex_init(&mock->lock); =20 @@ -259,6 +275,7 @@ struct spi_mockup_device { unsigned int bus_nr; struct mutex lock; struct platform_device *pdev; + struct spi_mockup_priv_data data; }; =20 static struct spi_mockup_device *to_spi_mockup_dev(struct config_item *ite= m) @@ -283,6 +300,9 @@ spi_mockup_enable_store(struct config_item *item, const= char *page, size_t len) =20 pdevinfo.name =3D "spi-mockup"; pdevinfo.id =3D dev->bus_nr; + pdevinfo.data =3D &dev->data; + pdevinfo.size_data =3D sizeof(dev->data); + dev->pdev =3D platform_device_register_full(&pdevinfo); if (IS_ERR(dev->pdev)) { ret =3D PTR_ERR(dev->pdev); @@ -315,9 +335,43 @@ spi_mockup_disable_store(struct config_item *item, con= st char *page, size_t len) } CONFIGFS_ATTR_WO(spi_mockup_, disable); =20 +#define SPI_MOCKUP_ATTR(type, name) \ +static ssize_t spi_mockup_ ## name ## _store(struct config_item *item, \ + const char *page, size_t len) \ +{ \ + int ret; \ + type val; \ + struct spi_mockup_device *dev =3D to_spi_mockup_dev(item); \ + \ + mutex_lock(&dev->lock); \ + if (dev->pdev) { \ + ret =3D -EBUSY; \ + goto out; \ + } \ + \ + ret =3D kstrto ## type(page, 0, &val); \ + if (ret) \ + goto out; \ + \ + dev->data.name =3D val; \ +out: \ + mutex_unlock(&dev->lock); \ + return ret ? ret : len; \ +} \ +CONFIGFS_ATTR_WO(spi_mockup_, name) \ + +SPI_MOCKUP_ATTR(u32, min_speed) +SPI_MOCKUP_ATTR(u32, max_speed) +SPI_MOCKUP_ATTR(u16, flags) +SPI_MOCKUP_ATTR(u16, num_cs) + static struct configfs_attribute *spi_mockup_configfs_attrs[] =3D { &spi_mockup_attr_enable, &spi_mockup_attr_disable, + &spi_mockup_attr_min_speed, + &spi_mockup_attr_max_speed, + &spi_mockup_attr_flags, + &spi_mockup_attr_num_cs, NULL, }; =20 @@ -342,6 +396,7 @@ spi_mockup_config_make_device_group(struct config_group= *group, if (!dev) return ERR_PTR(-ENOMEM); =20 + dev->data.num_cs =3D MOCKUP_CHIPSELECT_MAX; dev->bus_nr =3D nr; mutex_init(&dev->lock); =20 --=20 2.34.1