Messages in this thread | | | Subject | Re: [PATCH] i2c: virtio: add a virtio i2c frontend driver | From | Jason Wang <> | Date | Wed, 9 Sep 2020 17:02:07 +0800 |
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On 2020/9/3 下午1:34, Jie Deng wrote: > --- a/drivers/i2c/busses/Makefile > +++ b/drivers/i2c/busses/Makefile > @@ -6,6 +6,9 @@ > # ACPI drivers > obj-$(CONFIG_I2C_SCMI) += i2c-scmi.o > > +# VIRTIO I2C host controller driver > +obj-$(CONFIG_I2C_VIRTIO) += i2c-virtio.o > + > # PC SMBus host controller drivers > obj-$(CONFIG_I2C_ALI1535) += i2c-ali1535.o > obj-$(CONFIG_I2C_ALI1563) += i2c-ali1563.o > diff --git a/drivers/i2c/busses/i2c-virtio.c b/drivers/i2c/busses/i2c-virtio.c > new file mode 100644 > index 0000000..47f9fd1 > --- /dev/null > +++ b/drivers/i2c/busses/i2c-virtio.c > @@ -0,0 +1,276 @@ > +// SPDX-License-Identifier: GPL-2.0-or-later > +/* > + * Virtio I2C Bus Driver > + * > + * Copyright (c) 2020 Intel Corporation. All rights reserved. > + */ > + > +#include <linux/acpi.h> > +#include <linux/completion.h> > +#include <linux/err.h> > +#include <linux/i2c.h> > +#include <linux/io.h> > +#include <linux/jiffies.h> > +#include <linux/kernel.h> > +#include <linux/module.h> > +#include <linux/platform_device.h> > +#include <linux/wait.h> > + > +#include <linux/virtio.h> > +#include <linux/virtio_ids.h> > +#include <linux/virtio_config.h> > + > +#define VIRTIO_I2C_MSG_OK 0 > +#define VIRTIO_I2C_MSG_ERR 1 > + > +/** > + * struct virtio_i2c_hdr - the virtio I2C message header structure > + * @addr: i2c_msg addr, the slave address > + * @flags: i2c_msg flags > + * @len: i2c_msg len > + */ > +struct virtio_i2c_hdr { > + __virtio16 addr; > + __virtio16 flags; > + __virtio16 len; > +} __packed;
Btw, this part should belong to uAPI, and you need to define the status in uAPI.
Thanks
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