From: Billy Tsai <billy_tsai@aspeedtech.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
"jdelvare@suse.com" <jdelvare@suse.com>,
"linux@roeck-us.net" <linux@roeck-us.net>,
"robh+dt@kernel.org" <robh+dt@kernel.org>,
"krzysztof.kozlowski+dt@linaro.org"
<krzysztof.kozlowski+dt@linaro.org>,
"joel@jms.id.au" <joel@jms.id.au>,
"andrew@aj.id.au" <andrew@aj.id.au>,
"corbet@lwn.net" <corbet@lwn.net>,
"thierry.reding@gmail.com" <thierry.reding@gmail.com>,
"u.kleine-koenig@pengutronix.de" <u.kleine-koenig@pengutronix.de>,
"p.zabel@pengutronix.de" <p.zabel@pengutronix.de>,
"naresh.solanki@9elements.com" <naresh.solanki@9elements.com>,
"linux-hwmon@vger.kernel.org" <linux-hwmon@vger.kernel.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-aspeed@lists.ozlabs.org" <linux-aspeed@lists.ozlabs.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
"linux-pwm@vger.kernel.org" <linux-pwm@vger.kernel.org>,
BMC-SW <BMC-SW@aspeedtech.com>,
"patrick@stwcx.xyz" <patrick@stwcx.xyz>
Subject: Re: [PATCH v12 1/3] dt-bindings: hwmon: fan: Add fan binding to schema
Date: Tue, 16 Jan 2024 03:09:59 +0000 [thread overview]
Message-ID: <OSQPR06MB72520F546A22DE55532A33E78B732@OSQPR06MB7252.apcprd06.prod.outlook.com> (raw)
In-Reply-To: <54929342-7e06-4e39-a7e9-e5dc787406ce@linaro.org>
> > + pwms:
> > + description:
> > + PWM provider.
> > + maxItems: 1
> > +
> > + "#cooling-cells":
> > + const: 2
> > +
> > + cooling-levels:
> > + description:
> > + The control value which correspond to thermal cooling states.
> > + $ref: /schemas/types.yaml#/definitions/uint32-array
> > +
> > + tach-ch:
> > + description:
> > + The tach channel used for the fan.
> > + $ref: /schemas/types.yaml#/definitions/uint8-array
> What is the tach-channel and why is it different from pwm specifier?
Hi Krzysztof,
Using the Aspeed SoC as an example, our SoC features 16 PWMs and 16 tachometer channels that can be employed to control and monitor fans.
The "tach-ch" parameter is utilized to specify which tachometer channel is being used to monitor a specific fan.
The "pwms" parameter is utilized to specify which pwm channel is being used to control a specific fan.
Thanks
Best regards,
Billy Tsai
next prev parent reply other threads:[~2024-01-16 3:10 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-08 7:43 [PATCH v12 0/3] Support pwm/tach driver for aspeed ast26xx Billy Tsai
2024-01-08 7:43 ` [PATCH v12 1/3] dt-bindings: hwmon: fan: Add fan binding to schema Billy Tsai
2024-01-13 1:55 ` Rob Herring
2024-01-15 9:25 ` Krzysztof Kozlowski
2024-01-16 3:09 ` Billy Tsai [this message]
2024-01-08 7:43 ` [PATCH v12 2/3] dt-bindings: hwmon: Support Aspeed g6 PWM TACH Control Billy Tsai
2024-01-13 1:55 ` Rob Herring
2024-01-15 7:05 ` Billy Tsai
2024-01-15 7:56 ` Krzysztof Kozlowski
2024-01-15 8:43 ` Billy Tsai
2024-01-15 9:26 ` Krzysztof Kozlowski
2024-01-08 7:43 ` [PATCH v12 3/3] hwmon: (aspeed-g6-pwm-tacho): Support for ASPEED g6 PWM/Fan tach Billy Tsai
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