linux-kernel - Re: [RFC PATCH v5 2/3] virtio-spi: Add virtio-spi.h

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Message-ID: <1382320e-e5ae-47c4-be82-ab438032eac4@quicinc.com>
Date: Mon, 30 Jun 2025 12:29:25 +0530
From: Mukesh Kumar Savaliya <quic_msavaliy@...cinc.com>
To: Haixu Cui <quic_haixcui@...cinc.com>, <broonie@...nel.org>,
        <virtio-dev@...ts.linux.dev>, <viresh.kumar@...aro.org>,
        <linux-spi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <hdanton@...a.com>, <qiang4.zhang@...ux.intel.com>,
        <alex.bennee@...aro.org>
CC: <quic_ztu@...cinc.com>
Subject: Re: [RFC PATCH v5 2/3] virtio-spi: Add virtio-spi.h



On 6/20/2025 9:42 AM, Haixu Cui wrote:
> Add virtio-spi.h header for virtio SPI.
> 
> Signed-off-by: Haixu Cui <quic_haixcui@...cinc.com>
> ---
>   include/uapi/linux/virtio_spi.h | 185 ++++++++++++++++++++++++++++++++
>   1 file changed, 185 insertions(+)
>   create mode 100644 include/uapi/linux/virtio_spi.h
> 

[...]

> + * @max_cs_setup_ns: the maximum delay supported after chipselect is asserted,
And before clock start. may also sound good, if we can write "delay 
between CS assert to clock start"
> + *   in ns unit, 0 means delay is not supported to introduce after chipselect is
> + *   asserted.
> + * @max_cs_hold_ns: the maximum delay supported before chipselect is deasserted,
> + *   in ns unit, 0 means delay is not supported to introduce before chipselect
> + *   is deasserted.
> + * @max_cs_incative_ns: maximum delay supported after chipselect is deasserted,
> + *   in ns unit, 0 means delay is not supported to introduce after chipselect is
> + *   deasserted.
> + */