linux-kernel - Re: [PATCH 2/2] pinctrl: qcom: Add QDU1000/QRU1000 pinctrl driver

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Message-ID: <2f9237cf-1ce2-47ed-4aea-b7b3a890da16@quicinc.com>
Date:   Wed, 12 Oct 2022 11:54:20 -0700
From:   Melody Olvera <quic_molvera@...cinc.com>
To:     Bjorn Andersson <andersson@...nel.org>
CC:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        <linux-arm-msm@...r.kernel.org>, <linux-gpio@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] pinctrl: qcom: Add QDU1000/QRU1000 pinctrl driver



On 10/5/2022 6:50 PM, Bjorn Andersson wrote:
> On Fri, Sep 30, 2022 at 08:05:46PM -0700, Melody Olvera wrote:
> [..]
>> diff --git a/drivers/pinctrl/qcom/pinctrl-qdru1000.c b/drivers/pinctrl/qcom/pinctrl-qdru1000.c
>> new file mode 100644
>> index 000000000000..8b931ff80bb4
>> --- /dev/null
>> +++ b/drivers/pinctrl/qcom/pinctrl-qdru1000.c
>> @@ -0,0 +1,59 @@
>> +// SPDX-License-Identifier: GPL-2.0-only
>> +/*
>> + * Copyright (c) 2021, The Linux Foundation. All rights reserved.
>> + * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
>> + */
>> +
>> +#include <linux/module.h>
>> +#include <linux/of.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/pinctrl/pinctrl.h>
>> +
>> +#include "pinctrl-msm.h"
>> +#include "pinctrl-qdru1000.h"
>> +
>> +static const struct msm_pinctrl_soc_data qdru1000_tlmm = {
>> +	.pins = qdru1000_pins,
>> +	.npins = ARRAY_SIZE(qdru1000_pins),
>> +	.functions = qdru1000_functions,
>> +	.nfunctions = ARRAY_SIZE(qdru1000_functions),
>> +	.groups = qdru1000_groups,
>> +	.ngroups = ARRAY_SIZE(qdru1000_groups),
>> +	.ngpios = 151,
>> +};
>> +
>> +static int qdru1000_tlmm_probe(struct platform_device *pdev)
>> +{
>> +	return msm_pinctrl_probe(pdev, &qdru1000_tlmm);
>> +}
>> +
>> +static const struct of_device_id qdru1000_tlmm_of_match[] = {
>> +	{ .compatible = "qcom,qdu1000-tlmm", },
>> +	{ .compatible = "qcom,qru1000-tlmm", },
>> +	{ },
>> +};
>> +
>> +static struct platform_driver qdru1000_tlmm_driver = {
>> +	.driver = {
>> +		.name = "qdru1000-tlmm",
>> +		.of_match_table = qdru1000_tlmm_of_match,
>> +	},
>> +	.probe = qdru1000_tlmm_probe,
>> +	.remove = msm_pinctrl_remove,
>> +};
>> +
>> +static int __init qdru1000_tlmm_init(void)
>> +{
>> +	return platform_driver_register(&qdru1000_tlmm_driver);
>> +}
>> +arch_initcall(qdru1000_tlmm_init);
>> +
>> +static void __exit qdru1000_tlmm_exit(void)
>> +{
>> +	platform_driver_unregister(&qdru1000_tlmm_driver);
>> +}
>> +module_exit(qdru1000_tlmm_exit);
>> +
>> +MODULE_DESCRIPTION("QTI QDRU1000 TLMM driver");
>> +MODULE_LICENSE("GPL v2");
> "GPL" only please.
Ack.
>
>> +MODULE_DEVICE_TABLE(of, qdru1000_tlmm_of_match);
> Please add this next to qdru1000_tlmm_of_match.
Ack.
>
>> diff --git a/drivers/pinctrl/qcom/pinctrl-qdru1000.h b/drivers/pinctrl/qcom/pinctrl-qdru1000.h
> I'm not able to see why this is in a header file and the commit message
> doesn't give a clue. Please align with the customary form, or motivate
> your choice.
Will use customary form instead of header file.
>
> [..]
>> +
>> +enum qdru1000_functions {
>> +	msm_mux_gpio,
>> +	msm_mux_CMO_PRI,
>> +	msm_mux_SI5518_INT,
>> +	msm_mux_atest_char_start,
>> +	msm_mux_atest_char_status0,
>> +	msm_mux_atest_char_status1,
>> +	msm_mux_atest_char_status2,
>> +	msm_mux_atest_char_status3,
> For anything that denotes different pins in one function, please drop
> the suffix and make this a list of functions.
Got it.
>
> [..]
>> +	msm_mux_qspi_data_0,
>> +	msm_mux_qspi_data_1,
>> +	msm_mux_qspi_data_2,
>> +	msm_mux_qspi_data_3,
>> +	msm_mux_qup0_se0_l0,
> E.g. msm_mux_qup0_se0 is enough, giving each pin its own function means
> that we need to define each pin separate in DT.
Going to switch to qupN format per another thread.
> Regards,
> Bjorn
Thanks,
Melody