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

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Message-ID: <c5dd1c02-8538-4b9f-a453-d18e7a30ae30@ti.com>
Date: Thu, 4 Sep 2025 11:32:40 +0530
From: Sebin Francis <sebin.francis@...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>
Subject: Re: [PATCH v3 3/3] arm64: dts: ti: k3-pinctrl: Add the remaining
 macros

Hi Akash,

On 02/09/25 12:49, 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
> 
> Signed-off-by: Akashdeep Kaur <a-kaur@...com>
...
> +#define DS_OUT_VALUE_ZERO       (0 << DS_OUT_VAL_SHIFT)
> +#define DS_OUT_VALUE_ONE        (1 << DS_OUT_VAL_SHIFT)
> +
> +#define WKUP_ENABLE             (1 << WKUP_EN_SHIFT)
> +#define WKUP_ON_LEVEL           (1 << WKUP_LVL_EN_SHIFT)
> +#define WKUP_ON_EDGE            (0 << WKUP_LVL_EN_SHIFT)
> +#define WKUP_LEVEL_LOW          (0 << WKUP_LVL_POL_SHIFT)
> +#define WKUP_LEVEL_HIGH         (1 << WKUP_LVL_POL_SHIFT)
> +
> +#define WKUP_DISABLE            (0 << WKUP_EN_SHIFT)

This can be moved below WKUP_ENABLE macro to be consistent

> +
>   /* Only these macros are expected be used directly in device tree files */
>   #define PIN_OUTPUT		(INPUT_DISABLE | PULL_DISABLE)
>   #define PIN_OUTPUT_PULLUP	(INPUT_DISABLE | PULL_UP)
> @@ -53,18 +79,41 @@
>   #define PIN_DEBOUNCE_CONF5	(5 << DEBOUNCE_SHIFT)
>   #define PIN_DEBOUNCE_CONF6	(6 << DEBOUNCE_SHIFT)
>   
> +#define PIN_DRIVE_STRENGTH_NOMINAL      (0 << DRV_STR_SHIFT)
> +#define PIN_DRIVE_STRENGTH_SLOW         (1 << DRV_STR_SHIFT)
> +#define PIN_DRIVE_STRENGTH_FAST         (2 << DRV_STR_SHIFT)
...
> +#define DS_STATE_VAL                    (1 << DS_EN_SHIFT)
> +#define ACTIVE_STATE_VAL                (0 << DS_EN_SHIFT)

These can be moved to the top before PIN_* and can be renamed to 
DS_STATE_EN and DS_STATE_DIS

> +
> +#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

As EDGE wake is used commonly we can use the PIN_WKUP_EN_EDGE in this case

>   
>   /* Default mux configuration for gpio-ranges to use with pinctrl */
>   #define PIN_GPIO_RANGE_IOPAD	(PIN_INPUT | 7)

Thanks
Sebin