[6/6] ARM: shmobile: lager: Enable UHS-I SDR-50

Add the "1v8" pinctrl state and sd-uhs-sdr50 property to SDHI{0,2}.

Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
---
None of the states includes the CD pins, as they can't be allocated both
through pinctrl and as GPIOs.  But the Lager manual shows these signals
being pulled up to the same variable voltage as the other signals.  This
might possibly lead to spurious card detect interrupts after switching
to 1.8V signalling.

Ben.

 arch/arm/boot/dts/r8a7790-lager.dts |   18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

[CC Morimoto-san]

On Sun, May 17, 2015 at 01:39:44AM +0100, Ben Hutchings wrote:
> Add the "1v8" pinctrl state and sd-uhs-sdr50 property to SDHI{0,2}.
> 
> Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
> ---
> None of the states includes the CD pins, as they can't be allocated both
> through pinctrl and as GPIOs.  But the Lager manual shows these signals
> being pulled up to the same variable voltage as the other signals.  This
> might possibly lead to spurious card detect interrupts after switching
> to 1.8V signalling.

Morimoto-san,

I would appreciate your opinion on this change.

Thanks.

>  arch/arm/boot/dts/r8a7790-lager.dts |   18 ++++++++++++++++--
>  1 file changed, 16 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/r8a7790-lager.dts b/arch/arm/boot/dts/r8a7790-lager.dts
> index 343ec0ccc8df..5584e835d0f5 100644
> --- a/arch/arm/boot/dts/r8a7790-lager.dts
> +++ b/arch/arm/boot/dts/r8a7790-lager.dts
> @@ -314,11 +314,21 @@
>  		renesas,function = "sdhi0";
>  	};
>  
> +	sdhi0_pins_1v8: sd0_1v8 {
> +		renesas,groups = "sdhi0_data4", "sdhi0_ctrl";
> +		renesas,function = "sdhi0_1v8";
> +	};
> +
>  	sdhi2_pins: sd2 {
>  		renesas,groups = "sdhi2_data4", "sdhi2_ctrl";
>  		renesas,function = "sdhi2";
>  	};
>  
> +	sdhi2_pins_1v8: sd2_1v8 {
> +		renesas,groups = "sdhi2_data4", "sdhi2_ctrl";
> +		renesas,function = "sdhi2_1v8";
> +	};
> +
>  	mmc1_pins: mmc1 {
>  		renesas,groups = "mmc1_data8", "mmc1_ctrl";
>  		renesas,function = "mmc1";
> @@ -491,7 +501,8 @@
>  
>  &sdhi0 {
>  	pinctrl-0 = <&sdhi0_pins>;
> -	pinctrl-names = "default";
> +	pinctrl-1 = <&sdhi0_pins_1v8>;
> +	pinctrl-names = "default", "1v8";
>  
>  	assigned-clocks = <&mstp3_clks R8A7790_CLK_SDHI0>;
>  	assigned-clock-rates = <156000000>;
> @@ -499,12 +510,14 @@
>  	vmmc-supply = <&vcc_sdhi0>;
>  	vqmmc-supply = <&vccq_sdhi0>;
>  	cd-gpios = <&gpio3 6 GPIO_ACTIVE_LOW>;
> +	sd-uhs-sdr50;
>  	status = "okay";
>  };
>  
>  &sdhi2 {
>  	pinctrl-0 = <&sdhi2_pins>;
> -	pinctrl-names = "default";
> +	pinctrl-1 = <&sdhi2_pins_1v8>;
> +	pinctrl-names = "default", "1v8";
>  
>  	assigned-clocks = <&mstp3_clks R8A7790_CLK_SDHI2>;
>  	assigned-clock-rates = <97500000>;
> @@ -512,6 +525,7 @@
>  	vmmc-supply = <&vcc_sdhi2>;
>  	vqmmc-supply = <&vccq_sdhi2>;
>  	cd-gpios = <&gpio3 22 GPIO_ACTIVE_LOW>;
> +	sd-uhs-sdr50;
>  	status = "okay";
>  };
>  
> -- 
> 1.7.10.4
> 
> 
> 
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Hi Simon

> On Sun, May 17, 2015 at 01:39:44AM +0100, Ben Hutchings wrote:
> > Add the "1v8" pinctrl state and sd-uhs-sdr50 property to SDHI{0,2}.
> > 
> > Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
> > ---
> > None of the states includes the CD pins, as they can't be allocated both
> > through pinctrl and as GPIOs.  But the Lager manual shows these signals
> > being pulled up to the same variable voltage as the other signals.  This
> > might possibly lead to spurious card detect interrupts after switching
> > to 1.8V signalling.
> 
> Morimoto-san,
> 
> I would appreciate your opinion on this change.

Ben will send new version patch set if my understanding is correct


Best regards
---
Kuninori Morimoto
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On Mon, May 25, 2015 at 04:00:11AM +0000, Kuninori Morimoto wrote:
> 
> Hi Simon
> 
> > On Sun, May 17, 2015 at 01:39:44AM +0100, Ben Hutchings wrote:
> > > Add the "1v8" pinctrl state and sd-uhs-sdr50 property to SDHI{0,2}.
> > > 
> > > Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
> > > ---
> > > None of the states includes the CD pins, as they can't be allocated both
> > > through pinctrl and as GPIOs.  But the Lager manual shows these signals
> > > being pulled up to the same variable voltage as the other signals.  This
> > > might possibly lead to spurious card detect interrupts after switching
> > > to 1.8V signalling.
> > 
> > Morimoto-san,
> > 
> > I would appreciate your opinion on this change.
> 
> Ben will send new version patch set if my understanding is correct

Thanks, got it.
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