Re: [PATCH v4 2/8] pinctrl: sh-pfc: r8a7790: Implement voltage switching for SDHI

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Hi Laurent

Sorry for replying to old patch.
But, it seems Ben is waiting your answer about this patch
(This patch-set is not yet upstreamed)

> On Fri, 2015-07-03 at 00:21 +0100, Ben Hutchings wrote:
> > On Wed, 2015-07-01 at 10:37 +0300, Laurent Pinchart wrote:
> > [...]
> > > > +#define PIN_IO_VOLTAGE(bank, _pin, _name, sfx)		\
> > > > +	[RCAR_GP_PIN(bank, _pin)].configs = SH_PFC_PIN_CFG_IO_VOLTAGE
> > > > +
> > > >  static const struct sh_pfc_pin pinmux_pins[] = {
> > > >  	PINMUX_GPIO_GP_ALL(),
> > > > 
> > > > -	/* Pins not associated with a GPIO port */
> > > > +	/*
> > > > +	 * All pins assigned to GPIO bank 3 can be used for SD interfaces
> > > > +	 * in which case they support both 3.3V and 1.8V signalling.
> > > > +	 */
> > > > +	PORT_GP_32(3, PIN_IO_VOLTAGE, unused),
> > > > +
> > > > +	/* Pins not associated with a GPIO port, placed after all the GPIOs */
> > > > +	[RCAR_GP_PIN(5, 31) + 1] =
> > > 
> > > I'm sorry but I still don't like this. gcc outputs a warning when overriding 
> > > an initializer if you enable -Wextra, which leads me to believe this construct 
> > > is dubious. It should at least be tested with LLVM.
> > > 
> > > I'd much prefer replacing PINMUX_GPIO_GP_ALL() with a version that will 
> > > initialize the pins correctly right away.
> > [...]
> > 
> > Something like this?
> 
> Laurent, please can you answer whether this is the right way to go.
> 
> Ben.
> 
> > diff --git a/drivers/pinctrl/sh-pfc/pfc-emev2.c b/drivers/pinctrl/sh-pfc/pfc-emev2.c
> > index 849c6943ed30..ad1a8281a91b 100644
> > --- a/drivers/pinctrl/sh-pfc/pfc-emev2.c
> > +++ b/drivers/pinctrl/sh-pfc/pfc-emev2.c
> > @@ -228,7 +228,7 @@ enum {
> >  
> >  /* Expand to a list of sh_pfc_pin entries (named PORT#).
> >   * NOTE: No config are recorded since the driver do not handle pinconf. */
> > -#define __PIN_CFG(pn, pfx, sfx)  SH_PFC_PIN_CFG(pfx, 0)
> > +#define __PIN_CFG(pn, pfx, sfx)  SH_PFC_PORT_CFG(pfx, 0)
> >  #define PINMUX_EMEV_GPIO_ALL()	  CPU_ALL_PORT(__PIN_CFG, , unused)
> >  
> >  static const struct sh_pfc_pin pinmux_pins[] = {
> > diff --git a/drivers/pinctrl/sh-pfc/pfc-r8a73a4.c b/drivers/pinctrl/sh-pfc/pfc-r8a73a4.c
> > index 280a56f97786..ca1538371563 100644
> > --- a/drivers/pinctrl/sh-pfc/pfc-r8a73a4.c
> > +++ b/drivers/pinctrl/sh-pfc/pfc-r8a73a4.c
> > @@ -1272,8 +1272,8 @@ static const u16 pinmux_data[] = {
> >  #define __IO	(SH_PFC_PIN_CFG_INPUT | SH_PFC_PIN_CFG_OUTPUT)
> >  #define __PUD	(SH_PFC_PIN_CFG_PULL_DOWN | SH_PFC_PIN_CFG_PULL_UP)
> >  
> > -#define R8A73A4_PIN_IO_PU_PD(pin)       SH_PFC_PIN_CFG(pin, __IO | __PUD)
> > -#define R8A73A4_PIN_O(pin)              SH_PFC_PIN_CFG(pin, __O)
> > +#define R8A73A4_PIN_IO_PU_PD(pin)       SH_PFC_PORT_CFG(pin, __IO | __PUD)
> > +#define R8A73A4_PIN_O(pin)              SH_PFC_PORT_CFG(pin, __O)
> >  
> >  static const struct sh_pfc_pin pinmux_pins[] = {
> >  	R8A73A4_PIN_IO_PU_PD(0), R8A73A4_PIN_IO_PU_PD(1),
> > diff --git a/drivers/pinctrl/sh-pfc/pfc-r8a7740.c b/drivers/pinctrl/sh-pfc/pfc-r8a7740.c
> > index b486e9d20cc2..92939cbd7ad0 100644
> > --- a/drivers/pinctrl/sh-pfc/pfc-r8a7740.c
> > +++ b/drivers/pinctrl/sh-pfc/pfc-r8a7740.c
> > @@ -1535,15 +1535,15 @@ static const u16 pinmux_data[] = {
> >  #define __PU		(SH_PFC_PIN_CFG_PULL_UP)
> >  #define __PUD		(SH_PFC_PIN_CFG_PULL_DOWN | SH_PFC_PIN_CFG_PULL_UP)
> >  
> > -#define R8A7740_PIN_I_PD(pin)		SH_PFC_PIN_CFG(pin, __I | __PD)
> > -#define R8A7740_PIN_I_PU(pin)		SH_PFC_PIN_CFG(pin, __I | __PU)
> > -#define R8A7740_PIN_I_PU_PD(pin)	SH_PFC_PIN_CFG(pin, __I | __PUD)
> > -#define R8A7740_PIN_IO(pin)		SH_PFC_PIN_CFG(pin, __IO)
> > -#define R8A7740_PIN_IO_PD(pin)		SH_PFC_PIN_CFG(pin, __IO | __PD)
> > -#define R8A7740_PIN_IO_PU(pin)		SH_PFC_PIN_CFG(pin, __IO | __PU)
> > -#define R8A7740_PIN_IO_PU_PD(pin)	SH_PFC_PIN_CFG(pin, __IO | __PUD)
> > -#define R8A7740_PIN_O(pin)		SH_PFC_PIN_CFG(pin, __O)
> > -#define R8A7740_PIN_O_PU_PD(pin)	SH_PFC_PIN_CFG(pin, __O | __PUD)
> > +#define R8A7740_PIN_I_PD(pin)		SH_PFC_PORT_CFG(pin, __I | __PD)
> > +#define R8A7740_PIN_I_PU(pin)		SH_PFC_PORT_CFG(pin, __I | __PU)
> > +#define R8A7740_PIN_I_PU_PD(pin)	SH_PFC_PORT_CFG(pin, __I | __PUD)
> > +#define R8A7740_PIN_IO(pin)		SH_PFC_PORT_CFG(pin, __IO)
> > +#define R8A7740_PIN_IO_PD(pin)		SH_PFC_PORT_CFG(pin, __IO | __PD)
> > +#define R8A7740_PIN_IO_PU(pin)		SH_PFC_PORT_CFG(pin, __IO | __PU)
> > +#define R8A7740_PIN_IO_PU_PD(pin)	SH_PFC_PORT_CFG(pin, __IO | __PUD)
> > +#define R8A7740_PIN_O(pin)		SH_PFC_PORT_CFG(pin, __O)
> > +#define R8A7740_PIN_O_PU_PD(pin)	SH_PFC_PORT_CFG(pin, __O | __PUD)
> >  
> >  static const struct sh_pfc_pin pinmux_pins[] = {
> >  	/* Table 56-1 (I/O and Pull U/D) */
> > diff --git a/drivers/pinctrl/sh-pfc/pfc-r8a7790.c b/drivers/pinctrl/sh-pfc/pfc-r8a7790.c
> > index 1137bbc810cd..1e59e1775374 100644
> > --- a/drivers/pinctrl/sh-pfc/pfc-r8a7790.c
> > +++ b/drivers/pinctrl/sh-pfc/pfc-r8a7790.c
> > @@ -1740,20 +1740,23 @@ static const u16 pinmux_data[] = {
> >  #define PIN_NUMBER(r, c) (((r) - 'A') * 31 + (c) + 200)
> >  #define PIN_A_NUMBER(r, c) PIN_NUMBER(ROW_GROUP_A(r), c)
> >  
> > -#define PIN_IO_VOLTAGE(bank, _pin, _name, sfx)		\
> > -	[RCAR_GP_PIN(bank, _pin)].configs = SH_PFC_PIN_CFG_IO_VOLTAGE
> > +/*
> > + * All pins assigned to GPIO bank 3 can be used for SD interfaces in
> > + * which case they support both 3.3V and 1.8V signalling.
> > + */
> > +#define GP_GPIO_IO_VOLTAGE(bank, _pin, _name, sfx)			\
> > +	[RCAR_GP_PIN(bank, _pin)] =					\
> > +		SH_PFC_GPIO_CFG(bank, _pin, _name, SH_PFC_PIN_CFG_IO_VOLTAGE)
> >  
> >  static const struct sh_pfc_pin pinmux_pins[] = {
> > -	PINMUX_GPIO_GP_ALL(),
> > -
> > -	/*
> > -	 * All pins assigned to GPIO bank 3 can be used for SD interfaces
> > -	 * in which case they support both 3.3V and 1.8V signalling.
> > -	 */
> > -	PORT_GP_32(3, PIN_IO_VOLTAGE, unused),
> > +	PORT_GP_32(0, _GP_GPIO, unused),
> > +	PORT_GP_32(1, _GP_GPIO, unused),
> > +	PORT_GP_32(2, _GP_GPIO, unused),
> > +	PORT_GP_32(3, GP_GPIO_IO_VOLTAGE, unused),
> > +	PORT_GP_32(4, _GP_GPIO, unused),
> > +	PORT_GP_32(5, _GP_GPIO, unused),
> >  
> >  	/* Pins not associated with a GPIO port, placed after all the GPIOs */
> > -	[RCAR_GP_PIN(5, 31) + 1] =
> >  	SH_PFC_PIN_NAMED(ROW_GROUP_A('F'), 15, AF15),
> >  	SH_PFC_PIN_NAMED(ROW_GROUP_A('G'), 15, AG15),
> >  	SH_PFC_PIN_NAMED(ROW_GROUP_A('H'), 15, AH15),
> > diff --git a/drivers/pinctrl/sh-pfc/pfc-sh73a0.c b/drivers/pinctrl/sh-pfc/pfc-sh73a0.c
> > index d2efbfb776ac..2c798550cd8c 100644
> > --- a/drivers/pinctrl/sh-pfc/pfc-sh73a0.c
> > +++ b/drivers/pinctrl/sh-pfc/pfc-sh73a0.c
> > @@ -1166,14 +1166,14 @@ static const u16 pinmux_data[] = {
> >  #define __PU		(SH_PFC_PIN_CFG_PULL_UP)
> >  #define __PUD		(SH_PFC_PIN_CFG_PULL_DOWN | SH_PFC_PIN_CFG_PULL_UP)
> >  
> > -#define SH73A0_PIN_I_PD(pin)		SH_PFC_PIN_CFG(pin, __I | __PD)
> > -#define SH73A0_PIN_I_PU(pin)		SH_PFC_PIN_CFG(pin, __I | __PU)
> > -#define SH73A0_PIN_I_PU_PD(pin)		SH_PFC_PIN_CFG(pin, __I | __PUD)
> > -#define SH73A0_PIN_IO(pin)		SH_PFC_PIN_CFG(pin, __IO)
> > -#define SH73A0_PIN_IO_PD(pin)		SH_PFC_PIN_CFG(pin, __IO | __PD)
> > -#define SH73A0_PIN_IO_PU(pin)		SH_PFC_PIN_CFG(pin, __IO | __PU)
> > -#define SH73A0_PIN_IO_PU_PD(pin)	SH_PFC_PIN_CFG(pin, __IO | __PUD)
> > -#define SH73A0_PIN_O(pin)		SH_PFC_PIN_CFG(pin, __O)
> > +#define SH73A0_PIN_I_PD(pin)		SH_PFC_PORT_CFG(pin, __I | __PD)
> > +#define SH73A0_PIN_I_PU(pin)		SH_PFC_PORT_CFG(pin, __I | __PU)
> > +#define SH73A0_PIN_I_PU_PD(pin)		SH_PFC_PORT_CFG(pin, __I | __PUD)
> > +#define SH73A0_PIN_IO(pin)		SH_PFC_PORT_CFG(pin, __IO)
> > +#define SH73A0_PIN_IO_PD(pin)		SH_PFC_PORT_CFG(pin, __IO | __PD)
> > +#define SH73A0_PIN_IO_PU(pin)		SH_PFC_PORT_CFG(pin, __IO | __PU)
> > +#define SH73A0_PIN_IO_PU_PD(pin)	SH_PFC_PORT_CFG(pin, __IO | __PUD)
> > +#define SH73A0_PIN_O(pin)		SH_PFC_PORT_CFG(pin, __O)
> >  
> >  /* Pin numbers for pins without a corresponding GPIO port number are computed
> >   * from the row and column numbers with a 1000 offset to avoid collisions with
> > diff --git a/drivers/pinctrl/sh-pfc/sh_pfc.h b/drivers/pinctrl/sh-pfc/sh_pfc.h
> > index 734f7a92229c..3eca740bba02 100644
> > --- a/drivers/pinctrl/sh-pfc/sh_pfc.h
> > +++ b/drivers/pinctrl/sh-pfc/sh_pfc.h
> > @@ -272,14 +272,18 @@ struct sh_pfc_soc_info {
> >  		.enum_id = _pin##_DATA,					\
> >  	}
> >  
> > -/* SH_PFC_PIN_CFG - Expand to a sh_pfc_pin entry (named PORT#) with config */
> > -#define SH_PFC_PIN_CFG(_pin, cfgs)					\
> > +/* SH_PFC_{PORT,GPIO}_CFG - Expand to a sh_pfc_pin entry with config */
> > +#define _SH_PFC_PIN_CFG(_pin, _name, cfgs)				\
> >  	{								\
> >  		.pin = _pin,						\
> > -		.name = __stringify(PORT##_pin),			\
> > -		.enum_id = PORT##_pin##_DATA,				\
> > +		.name = __stringify(_name),				\
> > +		.enum_id = _name##_DATA,				\
> >  		.configs = cfgs,					\
> >  	}
> > +#define SH_PFC_PORT_CFG(_pin, cfgs)				\
> > +	_SH_PFC_PIN_CFG(PORT##_pin, PORT##_pin, cfgs)
> > +#define SH_PFC_GPIO_CFG(bank, _pin, _name, cfgs)		\
> > +	_SH_PFC_PIN_CFG((bank * 32) + _pin, _name, cfgs)
> >  
> >  /* SH_PFC_PIN_NAMED - Expand to a sh_pfc_pin entry with the given name */
> >  #define SH_PFC_PIN_NAMED(row, col, _name)				\
> > --- END ---
> > 
> > If you're happy with that, I'll re-send the series (hopefully for the
> > last time!) with the r8a7790 changes squashed into "pinctrl: sh-pfc:
> > r8a7790: Implement voltage switching for SDHI" and the SH_PFC_PIN_CFG
> > macro change as a new patch before it.
> > 
> > Ben.
> > 
> 
> 


Best regards
---
Kuninori Morimoto
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