[PATCHv4 0/3] ARM: dts: socfpga: fix booting with SD/MMC

[PATCHv4 0/3] ARM: dts: socfpga: fix booting with SD/MMC

[dinguyen-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx]

From: Dinh Nguyen <dinguyen-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org>

The SOCFPGA dev kit was hanging during bootup on the SD/MMC driver loading.
The first patch fixes the booting and the 2nd patch adds a regulator node
for the SD/MMC driver to use.

v4 diff(s):
- Add a new patch to rename the GPIO IP DTS node
- Use &gpio1 to set status="okay"
- Update the cd-gpios to use &portb

v3 diff(s): Thanks to Doug Anderson, the real issue was that the GPIO bank used
by cd-gpios did not have status="okay" in the node. This cause the GPIO to not
get probed correctly.

In fact, prior to patch 3cf890fc42b "mmc: dw_mmc: Pass back errors from
mmc_of_parse()", the error was being masked, so it was not being detected.

v2 diff(s): Patch 2/2 ARM: dts: socfpga: Add a 3.3V fixed regulator node
        - Move the regulator nodes to their respective board dts file and
          correctly rename the regulator to match the schematic

Dinh Nguyen (3):
  ARM: dts: socfpga: rename gpio nodes
  ARM: dts: socfpga: Fix SD card detect
  ARM: dts: socfpga: Add a 3.3V fixed regulator node

 arch/arm/boot/dts/socfpga.dtsi                | 12 ++++++------
 arch/arm/boot/dts/socfpga_arria5.dtsi         |  2 +-
 arch/arm/boot/dts/socfpga_arria5_socdk.dts    | 12 ++++++++++++
 arch/arm/boot/dts/socfpga_cyclone5_socdk.dts  | 15 ++++++++++++++-
 arch/arm/boot/dts/socfpga_cyclone5_sockit.dts | 12 ++++++++++++
 5 files changed, 45 insertions(+), 8 deletions(-)

-- 
2.0.3

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[PATCHv4 1/3] ARM: dts: socfpga: rename gpio nodes

[dinguyen-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx]

From: Dinh Nguyen <dinguyen-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org>

Since the Synopsys GPIO IP can support multiple ports of varying widths, it
would make more sense to have the GPIO node DTS entry as this:

gpio0: gpio@ff708000{
	porta{
	};
};

Also, this is documented in the snps-dwapb-gpio.txt.

Suggested-by: Doug Anderson <dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
Signed-off-by: Dinh Nguyen <dinguyen-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org>
---
 arch/arm/boot/dts/socfpga.dtsi | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/arm/boot/dts/socfpga.dtsi b/arch/arm/boot/dts/socfpga.dtsi
index 45fce2c..4472fd9 100644
--- a/arch/arm/boot/dts/socfpga.dtsi
+++ b/arch/arm/boot/dts/socfpga.dtsi
@@ -547,7 +547,7 @@
 			status = "disabled";
 		};
 
-		gpio@ff708000 {
+		gpio0: gpio@ff708000 {
 			#address-cells = <1>;
 			#size-cells = <0>;
 			compatible = "snps,dw-apb-gpio";
@@ -555,7 +555,7 @@
 			clocks = <&per_base_clk>;
 			status = "disabled";
 
-			gpio0: gpio-controller@0 {
+			porta: gpio-controller@0 {
 				compatible = "snps,dw-apb-gpio-port";
 				gpio-controller;
 				#gpio-cells = <2>;
@@ -567,7 +567,7 @@
 			};
 		};
 
-		gpio@ff709000 {
+		gpio1: gpio@ff709000 {
 			#address-cells = <1>;
 			#size-cells = <0>;
 			compatible = "snps,dw-apb-gpio";
@@ -575,7 +575,7 @@
 			clocks = <&per_base_clk>;
 			status = "disabled";
 
-			gpio1: gpio-controller@0 {
+			portb: gpio-controller@0 {
 				compatible = "snps,dw-apb-gpio-port";
 				gpio-controller;
 				#gpio-cells = <2>;
@@ -587,7 +587,7 @@
 			};
 		};
 
-		gpio@ff70a000 {
+		gpio2: gpio@ff70a000 {
 			#address-cells = <1>;
 			#size-cells = <0>;
 			compatible = "snps,dw-apb-gpio";
@@ -595,7 +595,7 @@
 			clocks = <&per_base_clk>;
 			status = "disabled";
 
-			gpio2: gpio-controller@0 {
+			portc: gpio-controller@0 {
 				compatible = "snps,dw-apb-gpio-port";
 				gpio-controller;
 				#gpio-cells = <2>;
-- 
2.0.3

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Re: [PATCHv4 1/3] ARM: dts: socfpga: rename gpio nodes

[Doug Anderson]

Dinh,

On Wed, Oct 22, 2014 at 12:07 PM,  <dinguyen-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org> wrote:
> From: Dinh Nguyen <dinguyen-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org>
>
> Since the Synopsys GPIO IP can support multiple ports of varying widths, it
> would make more sense to have the GPIO node DTS entry as this:
>
> gpio0: gpio@ff708000{
>         porta{
>         };
> };
>
> Also, this is documented in the snps-dwapb-gpio.txt.
>
> Suggested-by: Doug Anderson <dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
> Signed-off-by: Dinh Nguyen <dinguyen-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org>
> ---
>  arch/arm/boot/dts/socfpga.dtsi | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)

For this one patch the card detect is even more broken than it already
was, but I guess that's OK.  If it's not you could probably just
squash this patch with the next.

Reviewed-by: Doug Anderson <dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
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[PATCHv4 2/3] ARM: dts: socfpga: Fix SD card detect

[dinguyen-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx]

From: Dinh Nguyen <dinguyen-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org>

Without this patch, the booting the SOCFPGA platform would hang at the
SDMMC driver loading. The issue, debugged by Doug Anderson, turned out
to be that the GPIO bank used by the SD card-detect was not set to
status="okay".

Also update the cd-gpios to point to portb of the &gpio1 GPIO IP.

Suggested-by: Doug Anderson <dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
Signed-off-by: Dinh Nguyen <dinguyen-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org>
---
v4: Use &gpio1 to set status="okay" and update cd-gpio=&portb
v3: Correctly degugged the issue to be a gpio node not having status="okay"
---
 arch/arm/boot/dts/socfpga_cyclone5_socdk.dts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/socfpga_cyclone5_socdk.dts b/arch/arm/boot/dts/socfpga_cyclone5_socdk.dts
index d7296a5..d91c943 100644
--- a/arch/arm/boot/dts/socfpga_cyclone5_socdk.dts
+++ b/arch/arm/boot/dts/socfpga_cyclone5_socdk.dts
@@ -53,6 +53,10 @@
 	rxc-skew-ps = <2000>;
 };
 
+&gpio1 {
+	status = "okay";
+};
+
 &i2c0 {
 	status = "okay";
 
@@ -69,7 +73,7 @@
 };
 
 &mmc0 {
-	cd-gpios = <&gpio1 18 0>;
+	cd-gpios = <&portb 18 0>;
 };
 
 &usb1 {
-- 
2.0.3

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Re: [PATCHv4 2/3] ARM: dts: socfpga: Fix SD card detect

[Doug Anderson]

Dinh,

On Wed, Oct 22, 2014 at 12:07 PM,  <dinguyen-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org> wrote:
> From: Dinh Nguyen <dinguyen-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org>
>
> Without this patch, the booting the SOCFPGA platform would hang at the
> SDMMC driver loading. The issue, debugged by Doug Anderson, turned out
> to be that the GPIO bank used by the SD card-detect was not set to
> status="okay".
>
> Also update the cd-gpios to point to portb of the &gpio1 GPIO IP.
>
> Suggested-by: Doug Anderson <dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
> Signed-off-by: Dinh Nguyen <dinguyen-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org>
> ---
> v4: Use &gpio1 to set status="okay" and update cd-gpio=&portb
> v3: Correctly degugged the issue to be a gpio node not having status="okay"
> ---
>  arch/arm/boot/dts/socfpga_cyclone5_socdk.dts | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)

Reviewed-by: Doug Anderson <dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
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[PATCHv4 3/3] ARM: dts: socfpga: Add a 3.3V fixed regulator node

[dinguyen-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx]

From: Dinh Nguyen <dinguyen-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org>

Without the 3.3V regulator node, the SDMMC driver will give these warnings:

dw_mmc ff704000.dwmmc0: No vmmc regulator found
dw_mmc ff704000.dwmmc0: No vqmmc regulator found

This patch adds the regulator node, and points the SD/MMC to the regulator.

Signed-off-by: Dinh Nguyen <dinguyen-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org>
Reviewed-by: Doug Anderson <dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
---
v3: Rename nodes to have schematic-name_regulator and remove "boot-on" and
    "always-on"
v2: Move the regulator nodes to their respective board dts file and
    correctly rename them to match the schematic
---
 arch/arm/boot/dts/socfpga_arria5.dtsi         |  2 +-
 arch/arm/boot/dts/socfpga_arria5_socdk.dts    | 12 ++++++++++++
 arch/arm/boot/dts/socfpga_cyclone5_socdk.dts  |  9 +++++++++
 arch/arm/boot/dts/socfpga_cyclone5_sockit.dts | 12 ++++++++++++
 4 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/socfpga_arria5.dtsi b/arch/arm/boot/dts/socfpga_arria5.dtsi
index 03e8268..1907cc6 100644
--- a/arch/arm/boot/dts/socfpga_arria5.dtsi
+++ b/arch/arm/boot/dts/socfpga_arria5.dtsi
@@ -29,7 +29,7 @@
 			};
 		};
 
-		dwmmc0@ff704000 {
+		mmc0: dwmmc0@ff704000 {
 			num-slots = <1>;
 			broken-cd;
 			bus-width = <4>;
diff --git a/arch/arm/boot/dts/socfpga_arria5_socdk.dts b/arch/arm/boot/dts/socfpga_arria5_socdk.dts
index 27d551c..ccaf417 100644
--- a/arch/arm/boot/dts/socfpga_arria5_socdk.dts
+++ b/arch/arm/boot/dts/socfpga_arria5_socdk.dts
@@ -37,6 +37,13 @@
 		*/
 		ethernet0 = &gmac1;
 	};
+
+	regulator_3_3v: 3-3-v-regulator {
+		compatible = "regulator-fixed";
+		regulator-name = "3.3V";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+	};
 };
 
 &gmac1 {
@@ -68,6 +75,11 @@
 	};
 };
 
+&mmc0 {
+	vmmc-supply = <&regulator_3_3v>;
+	vqmmc-supply = <&regulator_3_3v>;
+};
+
 &usb1 {
 	status = "okay";
 };
diff --git a/arch/arm/boot/dts/socfpga_cyclone5_socdk.dts b/arch/arm/boot/dts/socfpga_cyclone5_socdk.dts
index d91c943..258865d 100644
--- a/arch/arm/boot/dts/socfpga_cyclone5_socdk.dts
+++ b/arch/arm/boot/dts/socfpga_cyclone5_socdk.dts
@@ -37,6 +37,13 @@
 		 */
 		ethernet0 = &gmac1;
 	};
+
+	regulator_3_3v: 3-3-v-regulator {
+		compatible = "regulator-fixed";
+		regulator-name = "3.3V";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+	};
 };
 
 &gmac1 {
@@ -74,6 +81,8 @@
 
 &mmc0 {
 	cd-gpios = <&portb 18 0>;
+	vmmc-supply = <&regulator_3_3v>;
+	vqmmc-supply = <&regulator_3_3v>;
 };
 
 &usb1 {
diff --git a/arch/arm/boot/dts/socfpga_cyclone5_sockit.dts b/arch/arm/boot/dts/socfpga_cyclone5_sockit.dts
index d26f155..16ea6f5 100644
--- a/arch/arm/boot/dts/socfpga_cyclone5_sockit.dts
+++ b/arch/arm/boot/dts/socfpga_cyclone5_sockit.dts
@@ -37,6 +37,13 @@
 		 */
 		ethernet0 = &gmac1;
 	};
+
+	regulator_3_3v: vcc3p3-regulator {
+		compatible = "regulator-fixed";
+		regulator-name = "VCC3P3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+	};
 };
 
 &gmac1 {
@@ -53,6 +60,11 @@
 	rxc-skew-ps = <2000>;
 };
 
+&mmc0 {
+	vmmc-supply = <&regulator_3_3v>;
+	vqmmc-supply = <&regulator_3_3v>;
+};
+
 &usb1 {
 	status = "okay";
 };
-- 
2.0.3

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