linux-kernel - Re: [PATCH 1/6] pinctrl: qcom: Add ipq6018 pinctrl driver

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Date:   Fri, 7 Jun 2019 20:26:13 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Sricharan R <sricharan@...eaurora.org>
Cc:     robh+dt@...nel.org, sboyd@...eaurora.org, linus.walleij@...aro.org,
        agross@...nel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-gpio@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-soc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/6] pinctrl: qcom: Add ipq6018 pinctrl driver

On Wed 05 Jun 10:15 PDT 2019, Sricharan R wrote:

> Add initial pinctrl driver to support pin configuration with
> pinctrl framework for ipq6018.
> 
> Signed-off-by: Sricharan R <sricharan@...eaurora.org>
> Signed-off-by: Rajkumar Ayyasamy <arajkuma@...eaurora.org>
> Signed-off-by: speriaka <speriaka@...eaurora.org>

These should start with the author, then followed by each person that
handled the patch on its way to the list - so your name should probably
be last.  If you have more than one author add Co-developed-by, in
addition to the Signed-off-by.

And please spell our speriaka's first and last name.

[..]
> diff --git a/Documentation/devicetree/bindings/pinctrl/qcom,ipq6018-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/qcom,ipq6018-pinctrl.txt
[..]
> +- #gpio-cells:
> +	Usage: required
> +	Value type: <u32>
> +	Definition: must be 2. Specifying the pin number and flags, as defined
> +		    in <dt-bindings/gpio/gpio.h>

You're missing the required "gpio-ranges" property.

> +
[..]
> +- function:
> +	Usage: required
> +	Value type: <string>
> +	Definition: Specify the alternative function to be configured for the
> +		    specified pins. Functions are only valid for gpio pins.
> +		    Valid values are:
> +	adsp_ext, alsp_int, atest_bbrx0, atest_bbrx1, atest_char, atest_char0,

Please indent these.

[..]

The rest should be in a separate patch from the binding.

> diff --git a/drivers/pinctrl/qcom/Kconfig b/drivers/pinctrl/qcom/Kconfig
[..]
> +enum ipq6018_functions {
[..]
> +	msm_mux_NA,

I like when these are sorted, and if you make the last entry msm_mux__
the msm_pingroup array becomes easier to read.

> +};
[..]
> +static const struct msm_function ipq6018_functions[] = {
[..]
> +	FUNCTION(gcc_tlmm),

As above, please sort these.

> +};
> +
> +static const struct msm_pingroup ipq6018_groups[] = {
> +	PINGROUP(0, qpic_pad, wci20, qdss_traceclk_b, NA, burn0, NA, NA, NA,
> +		 NA),

Please ignore the 80-char and skip the line breaks.

> +	PINGROUP(1, qpic_pad, mac12, qdss_tracectl_b, NA, burn1, NA, NA, NA,
> +		 NA),
> +	PINGROUP(2, qpic_pad, wci20, qdss_tracedata_b, NA, NA, NA, NA, NA, NA),
> +	PINGROUP(3, qpic_pad, mac01, qdss_tracedata_b, NA, NA, NA, NA, NA, NA),
> +	PINGROUP(4, qpic_pad, mac01, qdss_tracedata_b, NA, NA, NA, NA, NA, NA),
> +	PINGROUP(5, qpic_pad4, mac21, qdss_tracedata_b, NA, NA, NA, NA, NA, NA),

Is there a reason to keep qpic_padN as separate functions from qpic_pad?

[..]
> +static struct platform_driver ipq6018_pinctrl_driver = {
> +	.driver = {
> +		.name = "ipq6018-pinctrl",
> +		.owner = THIS_MODULE,

.owner is populated automagically by platform_driver_register, so please
omit this.

> +		.of_match_table = ipq6018_pinctrl_of_match,
> +	},
> +	.probe = ipq6018_pinctrl_probe,
> +	.remove = msm_pinctrl_remove,
> +};

Regards,
Bjorn