From: Chen Yu <chenyu56@huawei.com>
To: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: <wangbinghui@hisilicon.com>, USB <linux-usb@vger.kernel.org>,
devicetree <devicetree@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Suzhuangluan <suzhuangluan@hisilicon.com>,
Kongfei <kongfei@hisilicon.com>, Arnd Bergmann <arnd@arndb.de>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
John Stultz <john.stultz@linaro.org>,
"Krogerus, Heikki" <heikki.krogerus@linux.intel.com>
Subject: Re: [PATCH v1 10/12] hikey960: Support usb functionality of Hikey960
Date: Tue, 4 Dec 2018 09:40:45 +0800 [thread overview]
Message-ID: <6810012e-9a77-dfdf-a738-14ce77a3027a@huawei.com> (raw)
In-Reply-To: <CAHp75VdSowHk4meQqqUamSjJJoVT59+pMZ1qjmmWd-W5nWBcUw@mail.gmail.com>
Hi,
On 2018/12/3 17:23, Andy Shevchenko wrote:
> On Mon, Dec 3, 2018 at 5:47 AM Yu Chen <chenyu56@huawei.com> wrote:
>>
>> This driver handles usb hub power on and typeC port event of HiKey960 board:
>> 1)DP&DM switching between usb hub and typeC port base on typeC port
>> state
>> 2)Control power of usb hub on Hikey960
>> 3)Control vbus of typeC port
>
>> +config HISI_HIKEY_USB
>> + tristate "USB functionality of HiSilicon Hikey Platform"
>> + depends on GPIOLIB
>
>> + default n
>
> No, Linus is not happy about this.
> Default n _is_ a default.
OK.
>
>> + help
>> + If you say yes here you get support for usb functionality of HiSilicon Hikey Platform.
>
>> +// SPDX-License-Identifier: GPL-2.0+
>> +/*
>> + * hisi_hikey_usb.c
>> + *
>> + * Copyright (c) Hisilicon Tech. Co., Ltd. All rights reserved.
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> + * it under the terms of the GNU General Public License as published by
>> + * the Free Software Foundation; either version 2 of the License, or
>> + * (at your option) any later version.
>> + *
>> + * This program is distributed in the hope that it will be useful,
>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
>> + * GNU General Public License for more details.
>> + *
>> + */
>
> Same comments to the above lines.
>
>> +#include <linux/module.h>
>> +#include <linux/kernel.h>
>> +#include <linux/slab.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/of.h>
>> +#include <linux/gpio/consumer.h>
>> +#include <linux/usb/role.h>
>> +#include <linux/notifier.h>
>
> Order?
>
>> + pr_debug("%s: set hub power %d\n", __func__, value);
>
> Noise.
>
>> + pr_debug("%s: switch to %s\n", __func__, switch_to_str);
>
> Noise.
>
>> + pr_debug("%s: set typec vbus gpio to %d\n", __func__, value);
>
> Noise.
>
>> + if (!nb)
>> + return -EINVAL;
>
> On which conditions this happen?
>
>> + pr_info("%s:set typec state to %lu\n", __func__, state);
>
> Noise!
>
> Guys, you perhaps can read about tracepoints and function tracer
> facilities in the kernel.
>
>> +static int hisi_hikey_usb_probe(struct platform_device *pdev)
>> +{
>
>> + pr_info("%s: typc_vbus_enable_val can't get\n", __func__);
>
> Noise!
OK.
>
>> + if (IS_ERR_OR_NULL(hisi_hikey_usb->typec_vbus)) {
>
> So, this check is redundant. You are repeating it below.
>
>> + if (!hisi_hikey_usb->typec_vbus)
>> + ret = -EINVAL;
>> + else
>> + ret = PTR_ERR(hisi_hikey_usb->typec_vbus);
>> + return ret;
>> + }
OK.
>
>> + if (IS_ERR_OR_NULL(hisi_hikey_usb->role_sw)) {
>
>> + pr_err("%s: usb_role_switch_get failed\n", __func__);
>
> Noise and same comment to the conditional check as above
>
>> + if (!hisi_hikey_usb->role_sw)
>> + ret = -ENOENT;
>> + else
>> + ret = PTR_ERR(hisi_hikey_usb->role_sw);
>> + return ret;
>> + }
>
>> + .of_match_table = of_match_ptr(id_table_hisi_hikey_usb),
>
> Does it compiles for non-OF case? Why macro is in use?
>
OK. I will add the "CONFIG_OF".
next prev parent reply other threads:[~2018-12-04 1:41 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-03 3:45 [PATCH v1 00/12] Add support for usb on Hikey960 Yu Chen
2018-12-03 3:45 ` [PATCH v1 01/12] dt-bindings: usb: add support for dwc3 controller on HiSilicon SoCs Yu Chen
2018-12-03 8:35 ` Sergei Shtylyov
2018-12-03 8:51 ` Chen Yu
2018-12-03 8:59 ` Sergei Shtylyov
2018-12-03 9:28 ` Chen Yu
2018-12-19 14:09 ` Rob Herring
2018-12-20 1:33 ` Chen Yu
2018-12-20 6:46 ` Felipe Balbi
2018-12-20 13:48 ` Rob Herring
2018-12-03 3:45 ` [PATCH v1 02/12] dt-bindings: phy: Add support for HiSilicon's hi3660 USB PHY Yu Chen
2018-12-19 14:14 ` Rob Herring
2018-12-20 1:52 ` Chen Yu
2018-12-03 3:45 ` [PATCH v1 03/12] dt-bindings: misc: Add bindings for HiSilicon usb hub and data role switch functionality on HiKey960 Yu Chen
2018-12-19 14:21 ` Rob Herring
2018-12-20 2:02 ` Chen Yu
2018-12-03 3:45 ` [PATCH v1 04/12] usb: dwc3: dwc3-hisi: Add code for dwc3 of Hisilicon Soc Platform Yu Chen
2018-12-03 8:12 ` Andy Shevchenko
2018-12-03 8:30 ` Chen Yu
2018-12-03 3:45 ` [PATCH v1 05/12] usb: dwc3: Add two quirks for Hisilicon Kirin " Yu Chen
2018-12-03 8:02 ` Andy Shevchenko
2018-12-03 8:23 ` Chen Yu
2018-12-03 3:45 ` [PATCH v1 06/12] phy: Add usb phy support for hi3660 Soc of Hisilicon Yu Chen
2018-12-03 8:14 ` Andy Shevchenko
2018-12-03 3:45 ` [PATCH v1 07/12] usb: roles: Find the usb role switch by also matching against the device node Yu Chen
2018-12-03 8:17 ` Andy Shevchenko
2018-12-03 12:25 ` Heikki Krogerus
2019-01-21 8:36 ` Chen Yu
2019-01-21 13:51 ` Heikki Krogerus
2019-01-25 12:35 ` Heikki Krogerus
2018-12-03 3:45 ` [PATCH v1 08/12] usb: roles: Add usb role switch notifier Yu Chen
2018-12-03 12:38 ` Heikki Krogerus
2018-12-04 1:07 ` Chen Yu
2018-12-03 3:45 ` [PATCH v1 09/12] usb: dwc3: Registering a role switch in the DRD code Yu Chen
2018-12-03 9:15 ` Andy Shevchenko
2018-12-03 9:30 ` Chen Yu
2018-12-03 12:43 ` Heikki Krogerus
2018-12-04 10:54 ` Heikki Krogerus
2018-12-05 0:56 ` Chen Yu
2018-12-03 3:45 ` [PATCH v1 10/12] hikey960: Support usb functionality of Hikey960 Yu Chen
2018-12-03 9:23 ` Andy Shevchenko
2018-12-04 1:40 ` Chen Yu [this message]
2018-12-04 17:47 ` Andy Shevchenko
2018-12-05 1:57 ` Chen Yu
2018-12-05 8:44 ` Andy Shevchenko
2018-12-03 3:45 ` [PATCH v1 11/12] usb: gadget: Add configfs attribuite for controling match_existing_only Yu Chen
2018-12-03 9:25 ` Andy Shevchenko
2018-12-04 1:22 ` Chen Yu
2018-12-03 9:53 ` Krzysztof Opasiak
2018-12-03 3:45 ` [PATCH v1 12/12] dts: hi3660: Add support for usb on Hikey960 Yu Chen
2018-12-04 12:45 ` Heikki Krogerus
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