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Date: Wed, 07 Oct 2015 16:59:04 +0900
From: Chanwoo Choi <cw00.choi@...sung.com>
To: Roger Quadros <rogerq@...com>, linux-kernel@...r.kernel.org
Cc: k.kozlowski@...sung.com, ckeepax@...nsource.wolfsonmicro.com,
gregkh@...uxfoundation.org, ramakrishna.pallala@...el.com,
patches@...nsource.wolfsonmicro.com, myungjoo.ham@...sung.com
Subject: Re: [PATCH v3] extcon: Modify the id and name of external connector
On 2015년 10월 07일 16:50, Roger Quadros wrote:
> On 07/10/15 10:42, Chanwoo Choi wrote:
>> On 2015년 10월 07일 16:33, Roger Quadros wrote:
>>> On 07/10/15 03:48, Chanwoo Choi wrote:
>>>> This patch modifies the id and name of external connector with the
>>>> additional prefix to clarify both attribute and meaning of external
>>>> connector as following:
>>>> - EXTCON_CHG_* mean the charger connector.
>>>> - EXTCON_JACK_* mean the jack connector.
>>>> - EXTCON_DISP_* mean the display port connector.
>>>>
>>>> Following table show the new name of external connector with old name:
>>>> --------------------------------------------------
>>>> Old extcon name | New extcon name |
>>>> --------------------------------------------------
>>>> EXTCON_TA | EXTCON_CHG_USB_DCP |
>>>> EXTCON_CHARGE_DOWNSTREAM| EXTCON_CHG_USB_CDP |
>>>> EXTCON_FAST_CHARGER | EXTCON_CHG_USB_DCP_FAST|
>>>> EXTCON_SLOW_CHARGER | EXTCON_CHG_USB_DCP_SLOW|
>>>
>>> I still have some concerns regarding the name DCP_FAST and DCP_SLOW.
>>> If I see the charger IC drivers that use FAST & SLOW, they either call it
>>> APPLE_500MA/1A or SPECIAL_500MA/1A.
>>
>> Right.
>>
>>>
>>> They are probably not compliant with USB DCP specification and hence
>>> the special name.
>>>
>>> So, should we call them EXTCON_CHG_USB_SPECIAL_FAST/SLOW instead?
>>
>> I don't prefer to use "SPECIAL" adjective for connector name.
>> I prefer following name at the first patch.
>> - EXTCON_CHG_USB_FAST
>> - EXTCON_CHG_USB_SLOW
>
> OK, that is fine with me.
>>
>>>
>>>> --------------------------------------------------
>>>> EXTCON_MICROPHONE | EXTCON_JACK_MICROPHONE |
>>>> EXTCON_HEADPHONE | EXTCON_JACK_HEADPHONE |
>>>> EXTCON_LINE_IN | EXTCON_JACK_LINE_IN |
>>>> EXTCON_LINE_OUT | EXTCON_JACK_LINE_OUT |
>>>> EXTCON_VIDEO_IN | EXTCON_JACK_VIDEO_IN |
>>>> EXTCON_VIDEO_OUT | EXTCON_JACK_VIDEO_OUT |
>>>> EXTCON_SPDIF_IN | EXTCON_JACK_SPDIF_IN |
>>>> EXTCON_SPDIF_OUT | EXTCON_JACK_SPDIF_OUT |
>>>> --------------------------------------------------
>>>> EXTCON_HMDI | EXTCON_DISP_HDMI |
>>>> EXTCON_MHL | EXTCON_DISP_MHL |
>>>> EXTCON_DVI | EXTCON_DISP_DVI |
>>>> EXTCON_VGA | EXTCON_DISP_VGA |
>>>> --------------------------------------------------
>>>>
>>>> And, when altering the name of USB charger connector, EXTCON refers to the
>>>> "Battery Charging v1.2 Spec and Adopters Agreement"[1] to use the standard
>>>> name of USB charging port as following. Following name of USB charging port
>>>> are already used in power_supply subsystem. We chan check it on patch[2].
>>>> - EXTCON_CHG_USB_DCP /* Dedicated Charging Port */
>>>> - EXTCON_CHG_USB_CDP /* Charging Downstream Port */
>>>> - EXTCON_CHG_USB_ACA /* Accessory Charger Adapter */
>>>>
>>>> [1] www.usb.org/developers/docs/devclass_docs/BCv1.2_070312.zip
>>>> [2] commit 85efc8a18ced ("power_supply: Add types for USB chargers")
>>>>
>>>> Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
>>>> [ckeepax: For the Arizona changes]
>>>> Acked-by: Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
>>>> ---
>>>> Changes from v2:
>>>> (https://lkml.org/lkml/2015/10/6/239)
>>>> - Remove the EXTCON_CHG_USB type to remove the possible confusion according to
>>>> Roger's comment and drop patch2 about EXTCON_CHG_USB.
>>>> - Fix the warning issue provided by scripts/checkpatch.pl
>>>>
>>>> Changes from v1:
>>>> (https://lkml.org/lkml/2015/10/3/304)
>>>> - Add acked tag by Charles Keepax for arizona changes
>>>> - Modify the name of USB charger connector as following:
>>>> : EXTCON_CHG_USB_FAST -> EXTCON_CHG_USB_DCP_FAST
>>>> : EXTCON_CHG_USB_SLOW -> EXTCON_CHG_USB_DCP_SLOW
>>>> - Add the missing EXTCON_CHG_USB_ACA charger connector
>>>> - Add one more patch to support the EXTCON_CHG_USB when SDP port is connected
>>>> or not
>>>>
>>>> drivers/extcon/extcon-arizona.c | 18 ++++++------
>>>> drivers/extcon/extcon-axp288.c | 12 ++++----
>>>> drivers/extcon/extcon-max14577.c | 17 +++++------
>>>> drivers/extcon/extcon-max77693.c | 32 +++++++++++----------
>>>> drivers/extcon/extcon-max77843.c | 27 ++++++++++--------
>>>> drivers/extcon/extcon-max8997.c | 21 +++++++-------
>>>> drivers/extcon/extcon-rt8973a.c | 4 +--
>>>> drivers/extcon/extcon-sm5502.c | 4 +--
>>>> drivers/extcon/extcon.c | 60 ++++++++++++++++++++-------------------
>>>> include/linux/extcon.h | 61 +++++++++++++++++++++++-----------------
>>>> 10 files changed, 137 insertions(+), 119 deletions(-)
>>>>
>>>> diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
>>>> index a1ab0a56b798..e4890dd4fefd 100644
>>>> --- a/drivers/extcon/extcon-arizona.c
>>>> +++ b/drivers/extcon/extcon-arizona.c
>>>> @@ -137,9 +137,9 @@ static const int arizona_micd_levels[] = {
>>>>
>>>> static const unsigned int arizona_cable[] = {
>>>> EXTCON_MECHANICAL,
>>>> - EXTCON_MICROPHONE,
>>>> - EXTCON_HEADPHONE,
>>>> - EXTCON_LINE_OUT,
>>>> + EXTCON_JACK_MICROPHONE,
>>>> + EXTCON_JACK_HEADPHONE,
>>>> + EXTCON_JACK_LINE_OUT,
>>>> EXTCON_NONE,
>>>> };
>>>>
>>>> @@ -600,7 +600,7 @@ static irqreturn_t arizona_hpdet_irq(int irq, void *data)
>>>> struct arizona_extcon_info *info = data;
>>>> struct arizona *arizona = info->arizona;
>>>> int id_gpio = arizona->pdata.hpdet_id_gpio;
>>>> - unsigned int report = EXTCON_HEADPHONE;
>>>> + unsigned int report = EXTCON_JACK_HEADPHONE;
>>>> int ret, reading;
>>>> bool mic = false;
>>>>
>>>> @@ -645,9 +645,9 @@ static irqreturn_t arizona_hpdet_irq(int irq, void *data)
>>>>
>>>> /* Report high impedence cables as line outputs */
>>>> if (reading >= 5000)
>>>> - report = EXTCON_LINE_OUT;
>>>> + report = EXTCON_JACK_LINE_OUT;
>>>> else
>>>> - report = EXTCON_HEADPHONE;
>>>> + report = EXTCON_JACK_HEADPHONE;
>>>>
>>>> ret = extcon_set_cable_state_(info->edev, report, true);
>>>> if (ret != 0)
>>>> @@ -732,7 +732,7 @@ err:
>>>> ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC);
>>>>
>>>> /* Just report headphone */
>>>> - ret = extcon_set_cable_state_(info->edev, EXTCON_HEADPHONE, true);
>>>> + ret = extcon_set_cable_state_(info->edev, EXTCON_JACK_HEADPHONE, true);
>>>> if (ret != 0)
>>>> dev_err(arizona->dev, "Failed to report headphone: %d\n", ret);
>>>>
>>>> @@ -789,7 +789,7 @@ err:
>>>> ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC);
>>>>
>>>> /* Just report headphone */
>>>> - ret = extcon_set_cable_state_(info->edev, EXTCON_HEADPHONE, true);
>>>> + ret = extcon_set_cable_state_(info->edev, EXTCON_JACK_HEADPHONE, true);
>>>> if (ret != 0)
>>>> dev_err(arizona->dev, "Failed to report headphone: %d\n", ret);
>>>>
>>>> @@ -915,7 +915,7 @@ static void arizona_micd_detect(struct work_struct *work)
>>>> arizona_identify_headphone(info);
>>>>
>>>> ret = extcon_set_cable_state_(info->edev,
>>>> - EXTCON_MICROPHONE, true);
>>>> + EXTCON_JACK_MICROPHONE, true);
>>>> if (ret != 0)
>>>> dev_err(arizona->dev, "Headset report failed: %d\n",
>>>> ret);
>>>> diff --git a/drivers/extcon/extcon-axp288.c b/drivers/extcon/extcon-axp288.c
>>>> index 9668d6a94e38..14e748051288 100644
>>>> --- a/drivers/extcon/extcon-axp288.c
>>>> +++ b/drivers/extcon/extcon-axp288.c
>>>> @@ -102,9 +102,9 @@ enum axp288_extcon_irq {
>>>> };
>>>>
>>>> static const unsigned int axp288_extcon_cables[] = {
>>>> - EXTCON_SLOW_CHARGER,
>>>> - EXTCON_CHARGE_DOWNSTREAM,
>>>> - EXTCON_FAST_CHARGER,
>>>> + EXTCON_CHG_USB_DCP_SLOW,
>>>> + EXTCON_CHG_USB_CDP,
>>>> + EXTCON_CHG_USB_DCP_FAST,
>>>> EXTCON_NONE,
>>>> };
>>>>
>>>> @@ -192,18 +192,18 @@ static int axp288_handle_chrg_det_event(struct axp288_extcon_info *info)
>>>> dev_dbg(info->dev, "sdp cable is connecetd\n");
>>>
>>> as per comment this seems to be SDP.
>>
>> This patch modifies the only connector name.
>> If some comment should be fixed, we need to implement on separate patch.
>
> Agreed.
>>
>>>
>>>> notify_otg = true;
>>>> notify_charger = true;
>>>> - cable = EXTCON_SLOW_CHARGER;
>>>> + cable = EXTCON_CHG_USB_DCP_SLOW;
>>>
>>> So shouldn't this be cable = EXTCON_USB?
>>
>> No, EXTCON_CHG_USB_*_SLOW is right.
>>
>>>
>>>> break;
>>>> case DET_STAT_CDP:
>>>> dev_dbg(info->dev, "cdp cable is connecetd\n");
>>>> notify_otg = true;
>>>> notify_charger = true;
>>>> - cable = EXTCON_CHARGE_DOWNSTREAM;
>>>> + cable = EXTCON_CHG_USB_CDP;
>>>> break;
>>>> case DET_STAT_DCP:
>>>> dev_dbg(info->dev, "dcp cable is connecetd\n");
>>>
>>> This looks like standard DCP.
>>
>> ditto. Need the separate patch to fix it.
>
> Agreed.
>
>>
>>>
>>>> notify_charger = true;
>>>> - cable = EXTCON_FAST_CHARGER;
>>>> + cable = EXTCON_CHG_USB_DCP_FAST;
>>>
>>> Shouldn't this be cable = EXTCON_CHG_USB_DCP?
>>
>> No, EXTCON_CHG_USB_*_FAST is right.
>
> Why? The case is DET_STAT_DCP.
You're right. I'll fix it as following:
case DET_STAT_SDP -> EXTCON_USB
case DET_STAT_CDP -> EXTCON_CHG_USB_CDP
case DET_STAT_DCP -> EXTCON_CHG_USB_DCP
Thanks,
Chanwoo Choi
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