linux-kernel - Re: [PATCH v3 3/3] arm64: dts: ti: k3-pinctrl: Add the remaining macros

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Message-ID: <f2e60ec2-5a1f-4cff-a8ee-c2555d835946@ti.com>
Date: Thu, 4 Sep 2025 18:06:50 +0530
From: "Kumar, Udit" <u-kumar1@...com>
To: Akashdeep Kaur <a-kaur@...com>, <praneeth@...com>, <nm@...com>,
        <afd@...com>, <vigneshr@...com>, <d-gole@...com>, <kristo@...nel.org>,
        <robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC: <vishalm@...com>, <sebin.francis@...com>, <u-kumar1@...com>
Subject: Re: [PATCH v3 3/3] arm64: dts: ti: k3-pinctrl: Add the remaining
 macros


On 9/4/2025 5:09 PM, Akashdeep Kaur wrote:
> Hi Udit,
>
> On 04/09/25 14:27, Kumar, Udit wrote:
>> Hello Akashdeep,
>>
>> On 9/2/2025 12:49 PM, Akashdeep Kaur wrote:
>>> Add the drive stregth, schmitt trigger enable macros to pinctrl file.
>>> Add the missing macros for DeepSleep configuration control referenced
>>> from "Table 14-6172. Description Of The Pad Configuration Register 
>>> Bits"
>>> in AM625 TRM[0].
>>> Add some DeepSleep macros to provide combinations that can be used
>>> directly in device tree files example PIN_DS_OUTPUT_LOW that
>>> configures pin to be output and also sets its value to 0.
>>>
>>> [0] https://www.ti.com/lit/ug/spruiv7b/spruiv7b.pdf
> ...
>>>   #define PULLTYPESEL_SHIFT    (17)
>>>   #define RXACTIVE_SHIFT        (18)
>>> +#define DRV_STR_SHIFT           (19)
>>
>> referring to above TRM mentioned in commit message
>>
>> Bit 20-19 are for DRV_STR, and description says
>>
>> 0 - Default
>> 1 - Reserved
>> 2 - Reserved
>> 3 - Reserved
>>
>> Not sure, is there some additional document to be referred for 
>> PIN_DRIVE_STRENGTH
>
> This information will be updated in TRM in coming cycles.


Sorry ,

can not ack before TRM update



>>
>>
>>> +#define DS_ISO_OVERRIDE_SHIFT   (22)
>>> +#define DS_ISO_BYPASS_EN_SHIFT  (23)
>>
>> Please follow same convention as for rest of bit fields
>
> Updated.
>
>>
>> DS_ISO_OVERRIDE_SHIFT  to ISO_OVR_SHIFT and
>> DS_ISO_BYPASS_EN_SHIFT to ISO_BYP_SHIFT
>>
>>
>>
>>>   #define DEBOUNCE_SHIFT        (11)
>>>   #define FORCE_DS_EN_SHIFT    (15)
>>>   #define DS_EN_SHIFT        (24)
>>> @@ -19,6 +24,7 @@
>>>   #define DS_OUT_VAL_SHIFT    (26)
>>>   #define DS_PULLUD_EN_SHIFT    (27)
>>>   #define DS_PULLTYPE_SEL_SHIFT    (28)
>>> +#define WKUP_EN_SHIFT           (29)
>>>   /* Schmitt trigger configuration */
>>>   #define ST_DISABLE        (0 << ST_EN_SHIFT)
>>> @@ -33,6 +39,26 @@
>>>   #define INPUT_EN        (1 << RXACTIVE_SHIFT)
>>>   #define INPUT_DISABLE        (0 << RXACTIVE_SHIFT)
>>> +#define DS_PULL_DISABLE         (1 << DS_PULLUD_EN_SHIFT)
>>> +#define DS_PULL_ENABLE          (0 << DS_PULLUD_EN_SHIFT)
>>
>> what is purpose of shifting zero,
> This is added for consistency across the entire file.
>>
>>
>>> +
>>> +#define DS_PULL_UP              (1 << DS_PULLTYPE_SEL_SHIFT | 
> ...
>>> +#define PIN_DS_OUT_DISABLE DS_INPUT_EN
>>>   #define PIN_DS_OUT_VALUE_ZERO        (0 << DS_OUT_VAL_SHIFT)
>>>   #define PIN_DS_OUT_VALUE_ONE        (1 << DS_OUT_VAL_SHIFT)
>>>   #define PIN_DS_PULLUD_ENABLE        (0 << DS_PULLUD_EN_SHIFT)
>>>   #define PIN_DS_PULLUD_DISABLE        (1 << DS_PULLUD_EN_SHIFT)
>>>   #define PIN_DS_PULL_DOWN        (0 << DS_PULLTYPE_SEL_SHIFT)
>>>   #define PIN_DS_PULL_UP            (1 << DS_PULLTYPE_SEL_SHIFT)
>>> +#define PIN_DS_ISO_BYPASS               (1 << DS_ISO_BYPASS_EN_SHIFT)
>>> +#define PIN_DS_ISO_BYPASS_DISABLE       (0 << DS_ISO_BYPASS_EN_SHIFT)
>>> +
>>> +#define DS_STATE_VAL                    (1 << DS_EN_SHIFT)
>>> +#define ACTIVE_STATE_VAL                (0 << DS_EN_SHIFT)
>>> +
>>
>> Please do not mix PIN_x #define with other internal defines
>
> Moved these to appropriate location.
>
>>
>>> +#define PIN_DS_OUTPUT_LOW (DS_STATE_VAL | DS_INPUT_DISABLE | 
>>> DS_OUT_VALUE_ZERO)
>>> +#define PIN_DS_OUTPUT_HIGH              (DS_STATE_VAL | 
>>> DS_INPUT_DISABLE | DS_OUT_VALUE_ONE)
>>> +#define PIN_DS_INPUT                    (DS_STATE_VAL | DS_INPUT_EN 
>>> | DS_PULL_DISABLE)
>>> +#define PIN_DS_INPUT_PULLUP             (DS_STATE_VAL | DS_INPUT_EN 
>>> | DS_PULL_UP)
>>> +#define PIN_DS_INPUT_PULLDOWN           (DS_STATE_VAL | DS_INPUT_EN 
>>> | DS_PULL_DOWN)
>>> +
>>> +#define PIN_WKUP_EN_EDGE                (WKUP_ENABLE | WKUP_ON_EDGE)
>>> +#define PIN_WKUP_EN_LEVEL_LOW           (WKUP_ENABLE | 
>>> WKUP_ON_LEVEL | WKUP_LEVEL_LOW)
>>> +#define PIN_WKUP_EN_LEVEL_HIGH          (WKUP_ENABLE | 
>>> WKUP_ON_LEVEL | WKUP_LEVEL_HIGH)
>>> +#define PIN_WKUP_EN                     WKUP_EN_EDGE
>>
>> what is difference between PIN_WKUP_EN_EDGE and PIN_WKUP_EN
> Combined the macros to have default wakeup on edge
>>
>>
>>>   /* Default mux configuration for gpio-ranges to use with pinctrl */
>>>   #define PIN_GPIO_RANGE_IOPAD    (PIN_INPUT | 7)
>
> Regards,
> Akashdeep Kaur