diff mbox

[v2] gpio: rcar: Add r8a7793 and r8a7794 support

Message ID 1415361248-24610-1-git-send-email-ykaneko0929@gmail.com
State Accepted
Headers show

Commit Message

Yoshihiro Kaneko Nov. 7, 2014, 11:54 a.m. UTC 
From: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com>

The device tree probing for R-Car M2-N (r8a7793) and R-Car E2 (r8a7794)
is added.

Signed-off-by: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com>
Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
---

This patch is based on for-next branch of Linus Walleij's gpio tree.

v2 [Yoshihiro Kaneko]
* As suggested by Geert Uytterhoeven
  - clean up 4 identical copies of struct gpio_rcar_info.

 .../devicetree/bindings/gpio/renesas,gpio-rcar.txt |  4 +++-
 drivers/gpio/gpio-rcar.c                           | 27 ++++++++++++++--------
 2 files changed, 21 insertions(+), 10 deletions(-)

Comments

Linus Walleij Nov. 14, 2014, 10:04 a.m. UTC | #1 
On Fri, Nov 7, 2014 at 12:54 PM, Yoshihiro Kaneko <ykaneko0929@gmail.com> wrote:

> From: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com>
>
> The device tree probing for R-Car M2-N (r8a7793) and R-Car E2 (r8a7794)
> is added.
>
> Signed-off-by: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com>
> Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
> ---
>
> This patch is based on for-next branch of Linus Walleij's gpio tree.
>
> v2 [Yoshihiro Kaneko]
> * As suggested by Geert Uytterhoeven
>   - clean up 4 identical copies of struct gpio_rcar_info.

Patch applied.

As mentions in another thread I want someone to work on using
GPIOLIB_IRQCHIP for the Rcar driver.

Yours,
Linus Walleij
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Laurent Pinchart Dec. 12, 2014, 7:17 p.m. UTC | #2 
On Friday 07 November 2014 20:54:08 Yoshihiro Kaneko wrote:
> From: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com>
> 
> The device tree probing for R-Car M2-N (r8a7793) and R-Car E2 (r8a7794)
> is added.
> 
> Signed-off-by: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com>
> Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
> ---
> 
> This patch is based on for-next branch of Linus Walleij's gpio tree.
> 
> v2 [Yoshihiro Kaneko]
> * As suggested by Geert Uytterhoeven
>   - clean up 4 identical copies of struct gpio_rcar_info.
> 
>  .../devicetree/bindings/gpio/renesas,gpio-rcar.txt |  4 +++-
>  drivers/gpio/gpio-rcar.c                           | 27 ++++++++++++-------
>  2 files changed, 21 insertions(+), 10 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt
> b/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt index
> 941a26a..38fb86f 100644
> --- a/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt
> +++ b/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt
> @@ -6,7 +6,9 @@ Required Properties:
>      - "renesas,gpio-r8a7778": for R8A7778 (R-Mobile M1) compatible GPIO
> controller.
>      - "renesas,gpio-r8a7779": for R8A7779 (R-Car H1) compatible GPIO
> controller.
>      - "renesas,gpio-r8a7790": for R8A7790 (R-Car H2) compatible GPIO
> controller.
> -    - "renesas,gpio-r8a7791": for R8A7791 (R-Car M2) compatible GPIO
> controller.
> +    - "renesas,gpio-r8a7791": for R8A7791 (R-Car M2-W) compatible GPIO
> controller.
> +    - "renesas,gpio-r8a7793": for R8A7793 (R-Car M2-N) compatible GPIO
> controller.
> +    - "renesas,gpio-r8a7794": for R8A7794 (R-Car E2) compatible GPIO
> controller.
>      - "renesas,gpio-rcar": for generic R-Car GPIO controller.
> 
>    - reg: Base address and length of each memory resource used by the GPIO
> diff --git a/drivers/gpio/gpio-rcar.c b/drivers/gpio/gpio-rcar.c
> index ef71ca8..24f0343 100644
> --- a/drivers/gpio/gpio-rcar.c
> +++ b/drivers/gpio/gpio-rcar.c
> @@ -1,6 +1,7 @@
>  /*
>   * Renesas R-Car GPIO Support
>   *
> + *  Copyright (C) 2014 Renesas Electronics Corporation
>   *  Copyright (C) 2013 Magnus Damm
>   *
>   * This program is free software; you can redistribute it and/or modify
> @@ -315,22 +316,30 @@ struct gpio_rcar_info {
>  	bool has_both_edge_trigger;
>  };
> 
> +static const struct gpio_rcar_info gpio_rcar_info_gen1 = {
> +	.has_both_edge_trigger = false,
> +};
> +
> +static const struct gpio_rcar_info gpio_rcar_info_gen2 = {
> +	.has_both_edge_trigger = true,
> +};

Seriously, doesn't this call for a "renesas,gpio-rcar-gen2" compatible string 
?

>  static const struct of_device_id gpio_rcar_of_table[] = {
>  	{
>  		.compatible = "renesas,gpio-r8a7790",
> -		.data = (void *)&(const struct gpio_rcar_info) {
> -			.has_both_edge_trigger = true,
> -		},
> +		.data = &gpio_rcar_info_gen2,
>  	}, {
>  		.compatible = "renesas,gpio-r8a7791",
> -		.data = (void *)&(const struct gpio_rcar_info) {
> -			.has_both_edge_trigger = true,
> -		},
> +		.data = &gpio_rcar_info_gen2,
> +	}, {
> +		.compatible = "renesas,gpio-r8a7793",
> +		.data = &gpio_rcar_info_gen2,
> +	}, {
> +		.compatible = "renesas,gpio-r8a7794",
> +		.data = &gpio_rcar_info_gen2,
>  	}, {
>  		.compatible = "renesas,gpio-rcar",
> -		.data = (void *)&(const struct gpio_rcar_info) {
> -			.has_both_edge_trigger = false,
> -		},
> +		.data = &gpio_rcar_info_gen1,
>  	}, {
>  		/* Terminator */
>  	},
Magnus Damm Dec. 15, 2014, 2:03 a.m. UTC | #3 
Hi Geert,

On Sat, Dec 13, 2014 at 4:17 AM, Laurent Pinchart
<laurent.pinchart@ideasonboard.com> wrote:
> On Friday 07 November 2014 20:54:08 Yoshihiro Kaneko wrote:
>> From: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com>
>>
>> The device tree probing for R-Car M2-N (r8a7793) and R-Car E2 (r8a7794)
>> is added.
>>
>> Signed-off-by: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com>
>> Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
>> ---
>>
>> This patch is based on for-next branch of Linus Walleij's gpio tree.
>>
>> v2 [Yoshihiro Kaneko]
>> * As suggested by Geert Uytterhoeven
>>   - clean up 4 identical copies of struct gpio_rcar_info.
>>
>>  .../devicetree/bindings/gpio/renesas,gpio-rcar.txt |  4 +++-
>>  drivers/gpio/gpio-rcar.c                           | 27 ++++++++++++-------
>>  2 files changed, 21 insertions(+), 10 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt
>> b/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt index
>> 941a26a..38fb86f 100644
>> --- a/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt
>> +++ b/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt
>> @@ -6,7 +6,9 @@ Required Properties:
>>      - "renesas,gpio-r8a7778": for R8A7778 (R-Mobile M1) compatible GPIO
>> controller.
>>      - "renesas,gpio-r8a7779": for R8A7779 (R-Car H1) compatible GPIO
>> controller.
>>      - "renesas,gpio-r8a7790": for R8A7790 (R-Car H2) compatible GPIO
>> controller.
>> -    - "renesas,gpio-r8a7791": for R8A7791 (R-Car M2) compatible GPIO
>> controller.
>> +    - "renesas,gpio-r8a7791": for R8A7791 (R-Car M2-W) compatible GPIO
>> controller.
>> +    - "renesas,gpio-r8a7793": for R8A7793 (R-Car M2-N) compatible GPIO
>> controller.
>> +    - "renesas,gpio-r8a7794": for R8A7794 (R-Car E2) compatible GPIO
>> controller.
>>      - "renesas,gpio-rcar": for generic R-Car GPIO controller.
>>
>>    - reg: Base address and length of each memory resource used by the GPIO
>> diff --git a/drivers/gpio/gpio-rcar.c b/drivers/gpio/gpio-rcar.c
>> index ef71ca8..24f0343 100644
>> --- a/drivers/gpio/gpio-rcar.c
>> +++ b/drivers/gpio/gpio-rcar.c
>> @@ -1,6 +1,7 @@
>>  /*
>>   * Renesas R-Car GPIO Support
>>   *
>> + *  Copyright (C) 2014 Renesas Electronics Corporation
>>   *  Copyright (C) 2013 Magnus Damm
>>   *
>>   * This program is free software; you can redistribute it and/or modify
>> @@ -315,22 +316,30 @@ struct gpio_rcar_info {
>>       bool has_both_edge_trigger;
>>  };
>>
>> +static const struct gpio_rcar_info gpio_rcar_info_gen1 = {
>> +     .has_both_edge_trigger = false,
>> +};
>> +
>> +static const struct gpio_rcar_info gpio_rcar_info_gen2 = {
>> +     .has_both_edge_trigger = true,
>> +};
>
> Seriously, doesn't this call for a "renesas,gpio-rcar-gen2" compatible string
> ?

Maybe, but only if we had a crystal ball and could predict that the IP
would be guaranteed not to change inside future Gen2 devices! =)

/ magnus
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Geert Uytterhoeven Dec. 15, 2014, 8:41 a.m. UTC | #4 
Hi Magnus,

On Mon, Dec 15, 2014 at 3:03 AM, Magnus Damm <magnus.damm@gmail.com> wrote:
> Hi Geert,

For the record, it's Laurent who's questioning this...

> On Sat, Dec 13, 2014 at 4:17 AM, Laurent Pinchart
> <laurent.pinchart@ideasonboard.com> wrote:

[...]

>> Seriously, doesn't this call for a "renesas,gpio-rcar-gen2" compatible string
>> ?
>
> Maybe, but only if we had a crystal ball and could predict that the IP
> would be guaranteed not to change inside future Gen2 devices! =)

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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Laurent Pinchart Dec. 15, 2014, 8:49 a.m. UTC | #5 
Hi Magnus,

On Monday 15 December 2014 11:03:49 Magnus Damm wrote:
> On Sat, Dec 13, 2014 at 4:17 AM, Laurent Pinchart wrote:
> > On Friday 07 November 2014 20:54:08 Yoshihiro Kaneko wrote:
> >> From: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com>
> >> 
> >> The device tree probing for R-Car M2-N (r8a7793) and R-Car E2 (r8a7794)
> >> is added.
> >> 
> >> Signed-off-by: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com>
> >> Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
> >> ---
> >> 
> >> This patch is based on for-next branch of Linus Walleij's gpio tree.
> >> 
> >> v2 [Yoshihiro Kaneko]
> >> * As suggested by Geert Uytterhoeven
> >> 
> >>   - clean up 4 identical copies of struct gpio_rcar_info.
> >>  
> >>  .../devicetree/bindings/gpio/renesas,gpio-rcar.txt |  4 +++-
> >>  drivers/gpio/gpio-rcar.c                           | 27 +++++++++-------
> >>  2 files changed, 21 insertions(+), 10 deletions(-)
> >> 
> >> diff --git a/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt
> >> b/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt index
> >> 941a26a..38fb86f 100644
> >> --- a/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt
> >> +++ b/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt
> >> 
> >> @@ -6,7 +6,9 @@ Required Properties:
> >>      - "renesas,gpio-r8a7778": for R8A7778 (R-Mobile M1) compatible GPIO
> >> controller.
> >>      - "renesas,gpio-r8a7779": for R8A7779 (R-Car H1) compatible GPIO
> >> controller.
> >>      - "renesas,gpio-r8a7790": for R8A7790 (R-Car H2) compatible GPIO
> >> controller.
> >> -    - "renesas,gpio-r8a7791": for R8A7791 (R-Car M2) compatible GPIO
> >> controller.
> >> +    - "renesas,gpio-r8a7791": for R8A7791 (R-Car M2-W) compatible GPIO
> >> controller.
> >> +    - "renesas,gpio-r8a7793": for R8A7793 (R-Car M2-N) compatible GPIO
> >> controller.
> >> +    - "renesas,gpio-r8a7794": for R8A7794 (R-Car E2) compatible GPIO
> >> controller.
> >> 
> >>      - "renesas,gpio-rcar": for generic R-Car GPIO controller.
> >>    
> >>    - reg: Base address and length of each memory resource used by the
> >>    GPIO
> >> 
> >> diff --git a/drivers/gpio/gpio-rcar.c b/drivers/gpio/gpio-rcar.c
> >> index ef71ca8..24f0343 100644
> >> --- a/drivers/gpio/gpio-rcar.c
> >> +++ b/drivers/gpio/gpio-rcar.c
> >> @@ -1,6 +1,7 @@
> >>  /*
> >>   * Renesas R-Car GPIO Support
> >>   *
> >> + *  Copyright (C) 2014 Renesas Electronics Corporation
> >>   *  Copyright (C) 2013 Magnus Damm
> >>   *
> >>   * This program is free software; you can redistribute it and/or modify
> >> @@ -315,22 +316,30 @@ struct gpio_rcar_info {
> >>       bool has_both_edge_trigger;
> >>  };
> >> 
> >> +static const struct gpio_rcar_info gpio_rcar_info_gen1 = {
> >> +     .has_both_edge_trigger = false,
> >> +};
> >> +
> >> +static const struct gpio_rcar_info gpio_rcar_info_gen2 = {
> >> +     .has_both_edge_trigger = true,
> >> +};
> > 
> > Seriously, doesn't this call for a "renesas,gpio-rcar-gen2" compatible
> > string ?
> 
> Maybe, but only if we had a crystal ball and could predict that the IP
> would be guaranteed not to change inside future Gen2 devices! =)

Do we expect future Gen2 devices ? And if they happen to be incompatible we 
could call them v2.5 ;-)
Magnus Damm Dec. 15, 2014, 9:39 a.m. UTC | #6 
Hi Laurent (not Geert, sorry!),

On Mon, Dec 15, 2014 at 5:49 PM, Laurent Pinchart
<laurent.pinchart@ideasonboard.com> wrote:
> Hi Magnus,
>
> On Monday 15 December 2014 11:03:49 Magnus Damm wrote:
>> On Sat, Dec 13, 2014 at 4:17 AM, Laurent Pinchart wrote:
>> > On Friday 07 November 2014 20:54:08 Yoshihiro Kaneko wrote:
>> >> From: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com>
>> >>
>> >> The device tree probing for R-Car M2-N (r8a7793) and R-Car E2 (r8a7794)
>> >> is added.
>> >>
>> >> Signed-off-by: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com>
>> >> Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
>> >> ---
>> >>
>> >> This patch is based on for-next branch of Linus Walleij's gpio tree.
>> >>
>> >> v2 [Yoshihiro Kaneko]
>> >> * As suggested by Geert Uytterhoeven
>> >>
>> >>   - clean up 4 identical copies of struct gpio_rcar_info.
>> >>
>> >>  .../devicetree/bindings/gpio/renesas,gpio-rcar.txt |  4 +++-
>> >>  drivers/gpio/gpio-rcar.c                           | 27 +++++++++-------
>> >>  2 files changed, 21 insertions(+), 10 deletions(-)
>> >>
>> >> diff --git a/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt
>> >> b/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt index
>> >> 941a26a..38fb86f 100644
>> >> --- a/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt
>> >> +++ b/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt
>> >>
>> >> @@ -6,7 +6,9 @@ Required Properties:
>> >>      - "renesas,gpio-r8a7778": for R8A7778 (R-Mobile M1) compatible GPIO
>> >> controller.
>> >>      - "renesas,gpio-r8a7779": for R8A7779 (R-Car H1) compatible GPIO
>> >> controller.
>> >>      - "renesas,gpio-r8a7790": for R8A7790 (R-Car H2) compatible GPIO
>> >> controller.
>> >> -    - "renesas,gpio-r8a7791": for R8A7791 (R-Car M2) compatible GPIO
>> >> controller.
>> >> +    - "renesas,gpio-r8a7791": for R8A7791 (R-Car M2-W) compatible GPIO
>> >> controller.
>> >> +    - "renesas,gpio-r8a7793": for R8A7793 (R-Car M2-N) compatible GPIO
>> >> controller.
>> >> +    - "renesas,gpio-r8a7794": for R8A7794 (R-Car E2) compatible GPIO
>> >> controller.
>> >>
>> >>      - "renesas,gpio-rcar": for generic R-Car GPIO controller.
>> >>
>> >>    - reg: Base address and length of each memory resource used by the
>> >>    GPIO
>> >>
>> >> diff --git a/drivers/gpio/gpio-rcar.c b/drivers/gpio/gpio-rcar.c
>> >> index ef71ca8..24f0343 100644
>> >> --- a/drivers/gpio/gpio-rcar.c
>> >> +++ b/drivers/gpio/gpio-rcar.c
>> >> @@ -1,6 +1,7 @@
>> >>  /*
>> >>   * Renesas R-Car GPIO Support
>> >>   *
>> >> + *  Copyright (C) 2014 Renesas Electronics Corporation
>> >>   *  Copyright (C) 2013 Magnus Damm
>> >>   *
>> >>   * This program is free software; you can redistribute it and/or modify
>> >> @@ -315,22 +316,30 @@ struct gpio_rcar_info {
>> >>       bool has_both_edge_trigger;
>> >>  };
>> >>
>> >> +static const struct gpio_rcar_info gpio_rcar_info_gen1 = {
>> >> +     .has_both_edge_trigger = false,
>> >> +};
>> >> +
>> >> +static const struct gpio_rcar_info gpio_rcar_info_gen2 = {
>> >> +     .has_both_edge_trigger = true,
>> >> +};
>> >
>> > Seriously, doesn't this call for a "renesas,gpio-rcar-gen2" compatible
>> > string ?
>>
>> Maybe, but only if we had a crystal ball and could predict that the IP
>> would be guaranteed not to change inside future Gen2 devices! =)
>
> Do we expect future Gen2 devices ? And if they happen to be incompatible we
> could call them v2.5 ;-)

Random stuff is being invented all the time. I went to an embedded
fair here in Japan a month or two ago and ran into some customer with
a board that included a Gen2-related SoC with a name I've never seen
before. I see them all the time. This particular one had super-many
camera sensors or something. Anyway, the hardware guys are not asking
for our permission before they "fork and modify". So following
well-known part numbers for DT ABI seems like a safe practice to me.

Cheers,

/ magnus
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diff mbox

Patch

diff --git a/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt b/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt
index 941a26a..38fb86f 100644
--- a/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt
+++ b/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt
@@ -6,7 +6,9 @@  Required Properties:
     - "renesas,gpio-r8a7778": for R8A7778 (R-Mobile M1) compatible GPIO controller.
     - "renesas,gpio-r8a7779": for R8A7779 (R-Car H1) compatible GPIO controller.
     - "renesas,gpio-r8a7790": for R8A7790 (R-Car H2) compatible GPIO controller.
-    - "renesas,gpio-r8a7791": for R8A7791 (R-Car M2) compatible GPIO controller.
+    - "renesas,gpio-r8a7791": for R8A7791 (R-Car M2-W) compatible GPIO controller.
+    - "renesas,gpio-r8a7793": for R8A7793 (R-Car M2-N) compatible GPIO controller.
+    - "renesas,gpio-r8a7794": for R8A7794 (R-Car E2) compatible GPIO controller.
     - "renesas,gpio-rcar": for generic R-Car GPIO controller.
 
   - reg: Base address and length of each memory resource used by the GPIO
diff --git a/drivers/gpio/gpio-rcar.c b/drivers/gpio/gpio-rcar.c
index ef71ca8..24f0343 100644
--- a/drivers/gpio/gpio-rcar.c
+++ b/drivers/gpio/gpio-rcar.c
@@ -1,6 +1,7 @@ 
 /*
  * Renesas R-Car GPIO Support
  *
+ *  Copyright (C) 2014 Renesas Electronics Corporation
  *  Copyright (C) 2013 Magnus Damm
  *
  * This program is free software; you can redistribute it and/or modify
@@ -315,22 +316,30 @@  struct gpio_rcar_info {
 	bool has_both_edge_trigger;
 };
 
+static const struct gpio_rcar_info gpio_rcar_info_gen1 = {
+	.has_both_edge_trigger = false,
+};
+
+static const struct gpio_rcar_info gpio_rcar_info_gen2 = {
+	.has_both_edge_trigger = true,
+};
+
 static const struct of_device_id gpio_rcar_of_table[] = {
 	{
 		.compatible = "renesas,gpio-r8a7790",
-		.data = (void *)&(const struct gpio_rcar_info) {
-			.has_both_edge_trigger = true,
-		},
+		.data = &gpio_rcar_info_gen2,
 	}, {
 		.compatible = "renesas,gpio-r8a7791",
-		.data = (void *)&(const struct gpio_rcar_info) {
-			.has_both_edge_trigger = true,
-		},
+		.data = &gpio_rcar_info_gen2,
+	}, {
+		.compatible = "renesas,gpio-r8a7793",
+		.data = &gpio_rcar_info_gen2,
+	}, {
+		.compatible = "renesas,gpio-r8a7794",
+		.data = &gpio_rcar_info_gen2,
 	}, {
 		.compatible = "renesas,gpio-rcar",
-		.data = (void *)&(const struct gpio_rcar_info) {
-			.has_both_edge_trigger = false,
-		},
+		.data = &gpio_rcar_info_gen1,
 	}, {
 		/* Terminator */
 	},