linux-kernel - Re: [PATCH v2 1/5] pinctrl: sh-pfc: r8a7790: add pin definitions for the I2C3 interface

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Date:	Fri, 27 Sep 2013 02:09:38 +0200
From:	Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:	Guennadi Liakhovetski <g.liakhovetski@....de>
Cc:	linux-kernel@...r.kernel.org, Magnus Damm <magnus.damm@...il.com>,
	linux-sh@...r.kernel.org, Linus Walleij <linus.walleij@...aro.org>,
	Simon Horman <horms@...ge.net.au>,
	Guennadi Liakhovetski <g.liakhovetski+renesas@...il.com>
Subject: Re: [PATCH v2 1/5] pinctrl: sh-pfc: r8a7790: add pin definitions for the I2C3 interface

Hi Guennadi,

Thank you for the patch.

On Thursday 26 September 2013 19:20:56 Guennadi Liakhovetski wrote:
> There are four I2C interfaces on r8a7790, each of them can be connected to
> one of the two respective I2C controllers, e.g. interface #0 can be
> configured to work with I2C0 or with IIC0. Additionally some of those
> interfaces can also use one of several pin sets. Interface #3 is special,
> because it can be used in automatic mode for DVFS. It only has one set
> of pins available and those pins cannot be used for anything else, they
> also lack the GPIO function.
> 
> This patch uses the sh-pfc ability to configure pins, not associated with
> GPIOs and adds support for I2C3 to the r8a7790 PFC set up.
> 
> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@...il.com>

Acked-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

I've taken the patch in my tree and sent an update to my previous pull request 
for the pinctrl tree.

> ---
> 
> v2: s/16/31/ in pin number calculation, thanks to Laurent for pointing out.
> 
>  drivers/pinctrl/sh-pfc/pfc-r8a7790.c |   28 ++++++++++++++++++++++++++++
>  1 files changed, 28 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/pinctrl/sh-pfc/pfc-r8a7790.c
> b/drivers/pinctrl/sh-pfc/pfc-r8a7790.c index 5c2657b..72786fc 100644
> --- a/drivers/pinctrl/sh-pfc/pfc-r8a7790.c
> +++ b/drivers/pinctrl/sh-pfc/pfc-r8a7790.c
> @@ -781,6 +781,8 @@ enum {
>  	ADICS_SAMP_MARK, DU2_CDE_MARK, QPOLB_MARK, SCIFA2_RXD_B_MARK,
>  	USB1_PWEN_MARK, AUDIO_CLKOUT_D_MARK, USB1_OVC_MARK,
>  	TCLK1_B_MARK,
> +
> +	I2C3_SCL_MARK, I2C3_SDA_MARK,
>  	PINMUX_MARK_END,
>  };
> 
> @@ -1719,10 +1721,22 @@ static const u16 pinmux_data[] = {
>  	PINMUX_IPSR_DATA(IP16_6, AUDIO_CLKOUT_D),
>  	PINMUX_IPSR_DATA(IP16_7, USB1_OVC),
>  	PINMUX_IPSR_MODSEL_DATA(IP16_7, TCLK1_B, SEL_TMU1_1),
> +
> +	PINMUX_DATA(I2C3_SCL_MARK, FN_SEL_IICDVFS_1),
> +	PINMUX_DATA(I2C3_SDA_MARK, FN_SEL_IICDVFS_1),
>  };
> 
> +/* R8A7790 has 6 banks with 32 GPIOs in each = 192 GPIOs */
> +#define ROW_GROUP_A(r) ('Z' - 'A' + 1 + (r))
> +#define PIN_NUMBER(r, c) (((r) - 'A') * 31 + (c) + 200)
> +#define PIN_A_NUMBER(r, c) PIN_NUMBER(ROW_GROUP_A(r), c)
> +
>  static struct sh_pfc_pin pinmux_pins[] = {
>  	PINMUX_GPIO_GP_ALL(),
> +
> +	/* Pins not associated with a GPIO port */
> +	SH_PFC_PIN_NAMED(ROW_GROUP_A('J'), 15, AJ15),
> +	SH_PFC_PIN_NAMED(ROW_GROUP_A('H'), 15, AH15),
>  };
> 
>  /* - DU RGB
> ----------------------------------------------------------------- */ @@
> -2048,6 +2062,14 @@ static const unsigned int i2c2_e_pins[] = { static
> const unsigned int i2c2_e_mux[] = {
>  	I2C2_SCL_E_MARK, I2C2_SDA_E_MARK,
>  };
> +/* - I2C3
> ------------------------------------------------------------------- */
> +static const unsigned int i2c3_pins[] = {
> +	/* SCL, SDA */
> +	PIN_A_NUMBER('J', 15), PIN_A_NUMBER('H', 15),
> +};
> +static const unsigned int i2c3_mux[] = {
> +	I2C3_SCL_MARK, I2C3_SDA_MARK,
> +};
>  /* - INTC
> ------------------------------------------------------------------- */
> static const unsigned int intc_irq0_pins[] = {
>  	/* IRQ */
> @@ -3113,6 +3135,7 @@ static const struct sh_pfc_pin_group pinmux_groups[] =
> { SH_PFC_PIN_GROUP(i2c2_c),
>  	SH_PFC_PIN_GROUP(i2c2_d),
>  	SH_PFC_PIN_GROUP(i2c2_e),
> +	SH_PFC_PIN_GROUP(i2c3),
>  	SH_PFC_PIN_GROUP(intc_irq0),
>  	SH_PFC_PIN_GROUP(intc_irq1),
>  	SH_PFC_PIN_GROUP(intc_irq2),
> @@ -3323,6 +3346,10 @@ static const char * const i2c2_groups[] = {
>  	"i2c2_e",
>  };
> 
> +static const char * const i2c3_groups[] = {
> +	"i2c3",
> +};
> +
>  static const char * const intc_groups[] = {
>  	"intc_irq0",
>  	"intc_irq1",
> @@ -3551,6 +3578,7 @@ static const struct sh_pfc_function pinmux_functions[]
> = { SH_PFC_FUNCTION(hscif1),
>  	SH_PFC_FUNCTION(i2c1),
>  	SH_PFC_FUNCTION(i2c2),
> +	SH_PFC_FUNCTION(i2c3),
>  	SH_PFC_FUNCTION(intc),
>  	SH_PFC_FUNCTION(mmc0),
>  	SH_PFC_FUNCTION(mmc1),
-- 
Regards,

Laurent Pinchart

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