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From: Sudeep Holla <sudeep.holla@arm.com>
To: Guenter Roeck <linux@roeck-us.net>
Cc: linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	Cristian Marussi <cristian.marussi@arm.com>,
	Jean Delvare <jdelvare@suse.com>,
	linux-hwmon@vger.kernel.org, Sudeep Holla <sudeep.holla@arm.com>
Subject: Re: [PATCH 14/15] hwmon: (scmi-hwmon) Match scmi device by both name and protocol id
Date: Tue, 10 Dec 2019 18:20:11 +0000	[thread overview]
Message-ID: <20191210182011.GB20962@bogus> (raw)
In-Reply-To: <20191210180643.GA10944@roeck-us.net>

On Tue, Dec 10, 2019 at 10:06:43AM -0800, Guenter Roeck wrote:
> On Tue, Dec 10, 2019 at 02:53:44PM +0000, Sudeep Holla wrote:
> > The scmi bus now has support to match the driver with devices not only
> > based on their protocol id but also based on their device name if one is
> > available. This was added to cater the need to support multiple devices
> > and drivers for the same protocol.
> >
> > Let us add the name "hwmon" to scmi_device_id table in the driver so
> > that in matches only with device with the same name and protocol id
> > SCMI_PROTOCOL_SENSOR. This will help to add IIO support in parallel if
> > needed.
>
> If you are planning to re-implement the driver as iio driver, it would
> make more sense to drop the hwmon driver entirely and use the iio->hwmon
> bridge to access the sensors as hwmon devices if needed.
>

Ah, does it provides the same interface as hwmon to userspace ? Sorry but
I haven't spent much time looking at IIO yet, but since there are similar
needs to share protocol between subsystems in the kernel, this was just
an example that I listed as recently some requirement to add IIO SCMI
support had come up. If we can achieve hwmon kind of interface with iio->hwmon,
we should do that. We have other examples like devfreq and cpufreq, genpd
and regulators.

This patch is optional at least as of now (but good to have for completeness),
if the driver provides no name, we just match on protocol id only.

--
Regards,
Sudeep

  reply	other threads:[~2019-12-10 18:20 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-10 14:53 [PATCH 00/15] firmware: arm_scmi: Add support for multiple device per protocol Sudeep Holla
2019-12-10 14:53 ` [PATCH 01/15] " Sudeep Holla
2019-12-10 17:02   ` Cristian Marussi
2019-12-10 14:53 ` [PATCH 02/15] firmware: arm_scmi: Skip scmi mbox channel setup for addtional devices Sudeep Holla
2019-12-10 17:33   ` Cristian Marussi
2019-12-10 14:53 ` [PATCH 03/15] firmware: arm_scmi: Skip protocol initialisation for additional devices Sudeep Holla
2019-12-10 18:14   ` Cristian Marussi
2019-12-10 14:53 ` [PATCH 04/15] firmware: arm_scmi: Add names to scmi devices created Sudeep Holla
2019-12-10 18:26   ` Cristian Marussi
2019-12-10 14:53 ` [PATCH 05/15] firmware: arm_scmi: Add versions and identifier attributes using dev_groups Sudeep Holla
2019-12-11 13:21   ` Cristian Marussi
2019-12-10 14:53 ` [PATCH 06/15] firmware: arm_scmi: Update scmi_prot_init_fn_t to use device instead of handle Sudeep Holla
2019-12-11 17:34   ` Cristian Marussi
2019-12-10 14:53 ` [PATCH 07/15] firmware: arm_scmi: Stash version in protocol init functions Sudeep Holla
2019-12-11 17:35   ` Cristian Marussi
2019-12-10 14:53 ` [PATCH 08/15] firmware: arm_scmi: Add and initialise protocol version to scmi_device structure Sudeep Holla
2019-12-11 18:06   ` Cristian Marussi
2019-12-12 12:15     ` Sudeep Holla
2019-12-10 14:53 ` [PATCH 09/15] firmware: arm_scmi: Add scmi protocol version and id device attributes Sudeep Holla
2019-12-11 18:08   ` Cristian Marussi
2019-12-10 14:53 ` [PATCH 10/15] firmware: arm_scmi: Drop logging individual scmi protocol version Sudeep Holla
2019-12-11 18:09   ` Cristian Marussi
2019-12-10 14:53 ` [PATCH 11/15] firmware: arm_scmi: Match scmi device by both name and protocol id Sudeep Holla
2019-12-11 18:09   ` Cristian Marussi
2019-12-11 18:10   ` Cristian Marussi
2019-12-10 14:53 ` [PATCH 12/15] clk: scmi: " Sudeep Holla
2019-12-24  7:49   ` Stephen Boyd
2019-12-10 14:53 ` [PATCH 13/15] cpufreq: " Sudeep Holla
2019-12-11  2:39   ` Viresh Kumar
2019-12-11 10:13     ` Sudeep Holla
2019-12-11 10:30       ` Viresh Kumar
2019-12-10 14:53 ` [PATCH 14/15] hwmon: (scmi-hwmon) " Sudeep Holla
2019-12-10 18:06   ` Guenter Roeck
2019-12-10 18:20     ` Sudeep Holla [this message]
2019-12-10 14:53 ` [PATCH 15/15] reset: reset-scmi: " Sudeep Holla
2019-12-11  9:51   ` Philipp Zabel
2019-12-11 15:28     ` Sudeep Holla

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