[PATCH 0/3] usb: ohci: jz4740: Add DT support and a fix

[PATCH 0/3] usb: ohci: jz4740: Add DT support and a fix

[Zubair Lutfullah Kakakhel]

Hi,

Here are a few simple patches for the jz4740.

First adds a simple DT binding.
Seconds adds DT support.
Third is a minor fix in clock enabling.

Patches are based on 3.19-rc6. Quite disjoint and stay within jz4740 
so should apply easily on other trees.

If you would like to have them rebased to a different tree, please tell.

Thank-you

ZubairLK

Paul Burton (3):
  dt: usb: jz4740: Add DT binding document for OHCI
  usb: ohci: jz4740: add DT support
  usb: ohci: jz4740: prepare the clock before enabling it

 .../bindings/usb/ingenic,jz47xx-ohci.txt           | 28 ++++++++++++++++++++++
 drivers/usb/host/ohci-jz4740.c                     | 11 ++++++++-
 2 files changed, 38 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/usb/ingenic,jz47xx-ohci.txt

-- 
1.9.1

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[PATCH 1/3] dt: usb: jz4740: Add DT binding document for OHCI

[Zubair Lutfullah Kakakhel]

From: Paul Burton <paul.burton-1AXoQHu6uovQT0dZR+AlfA@public.gmane.org>

Add the binding documentation for the JZ47xx OHCI controller.

Signed-off-by: Paul Burton <paul.burton-1AXoQHu6uovQT0dZR+AlfA@public.gmane.org>
Signed-off-by: Zubair Lutfullah Kakakhel <Zubair.Kakakhel-1AXoQHu6uovQT0dZR+AlfA@public.gmane.org>

---
The jz4740 is platform only at the moment.

But DT support is being added

See http://patchwork.linux-mips.org/bundle/paulburton/ci20-v3.20/

jz47xx is used because jz4780 will also use this driver
---
 .../bindings/usb/ingenic,jz47xx-ohci.txt           | 28 ++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/ingenic,jz47xx-ohci.txt

diff --git a/Documentation/devicetree/bindings/usb/ingenic,jz47xx-ohci.txt b/Documentation/devicetree/bindings/usb/ingenic,jz47xx-ohci.txt
new file mode 100644
index 0000000..2fada8b
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/ingenic,jz47xx-ohci.txt
@@ -0,0 +1,28 @@
+Ingenic JZ47XX SoC OHCI controller binding
+
+The Ingenic JZ47XX SoC includes an OHCI compliant USB host controller
+interface for use with USB 1.1 devices.
+
+Required properties:
+ - compatible: Should be "ingenic,jz4740-ohci"
+ - reg: Should contain the address & size of the OHCI controller registers.
+ - interrupt-parent: Should be the phandle of the interrupt controller that
+   delivers interrupts to the OHCI block.
+ - interrupts: Should specify the interrupt provided by interrupt-parent.
+ - clocks: Should contain a single clock specifier for the SoC UHC clock.
+
+Example SoC include file for jz4780:
+
+/ {
+	ohci: jz4780-ohci@0x134a0000 {
+		compatible = "ingenic,jz4780-ohci";
+		reg = <0x134a0000 0x10000>;
+
+		interrupt-parent = <&intc>;
+		interrupts = <5>;
+
+		clocks = <&cgu JZ4780_CLK_UHC>;
+		clock-names = "uhc";
+	};
+};
+
-- 
1.9.1

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Re: [PATCH 1/3] dt: usb: jz4740: Add DT binding document for OHCI

[Sergei Shtylyov]

Hello.

On 01/27/2015 04:47 PM, Zubair Lutfullah Kakakhel wrote:

> From: Paul Burton <paul.burton-1AXoQHu6uovQT0dZR+AlfA@public.gmane.org>

> Add the binding documentation for the JZ47xx OHCI controller.

> Signed-off-by: Paul Burton <paul.burton-1AXoQHu6uovQT0dZR+AlfA@public.gmane.org>
> Signed-off-by: Zubair Lutfullah Kakakhel <Zubair.Kakakhel-1AXoQHu6uovQT0dZR+AlfA@public.gmane.org>

> ---
> The jz4740 is platform only at the moment.

> But DT support is being added

> See http://patchwork.linux-mips.org/bundle/paulburton/ci20-v3.20/

> jz47xx is used because jz4780 will also use this driver
> ---
>   .../bindings/usb/ingenic,jz47xx-ohci.txt           | 28 ++++++++++++++++++++++
>   1 file changed, 28 insertions(+)
>   create mode 100644 Documentation/devicetree/bindings/usb/ingenic,jz47xx-ohci.txt

> diff --git a/Documentation/devicetree/bindings/usb/ingenic,jz47xx-ohci.txt b/Documentation/devicetree/bindings/usb/ingenic,jz47xx-ohci.txt
> new file mode 100644
> index 0000000..2fada8b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/ingenic,jz47xx-ohci.txt
> @@ -0,0 +1,28 @@
> +Ingenic JZ47XX SoC OHCI controller binding

    I think JZ47xx would look a bit better.

> +
> +The Ingenic JZ47XX SoC includes an OHCI compliant USB host controller
> +interface for use with USB 1.1 devices.
> +
> +Required properties:
> + - compatible: Should be "ingenic,jz4740-ohci"
> + - reg: Should contain the address & size of the OHCI controller registers.
> + - interrupt-parent: Should be the phandle of the interrupt controller that
> +   delivers interrupts to the OHCI block.

    This is never a required prop, it can be inherited from a parent node.

> + - interrupts: Should specify the interrupt provided by interrupt-parent.
> + - clocks: Should contain a single clock specifier for the SoC UHC clock.
> +
> +Example SoC include file for jz4780:
> +
> +/ {
> +	ohci: jz4780-ohci@0x134a0000 {

    The ePAPR standard says we shouldn't name the nodes after the chips used 
but use the generic names, which would be "usb" in this case. And please drop 
"0x" from the <unit-address> part of the name.

> +		compatible = "ingenic,jz4780-ohci";
> +		reg = <0x134a0000 0x10000>;
> +
> +		interrupt-parent = <&intc>;
> +		interrupts = <5>;
> +
> +		clocks = <&cgu JZ4780_CLK_UHC>;
> +		clock-names = "uhc";

    You forgot to mention this prop above.

[...]

WBR, Sergei

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[PATCH 2/3] usb: ohci: jz4740: add DT support

[Zubair Lutfullah Kakakhel]

From: Paul Burton <paul.burton@imgtec.com>

This is a simple matter of providing a match table, the probe code needs
no modification.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
---
 drivers/usb/host/ohci-jz4740.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/usb/host/ohci-jz4740.c b/drivers/usb/host/ohci-jz4740.c
index 8ddd8f5..bb69733 100644
--- a/drivers/usb/host/ohci-jz4740.c
+++ b/drivers/usb/host/ohci-jz4740.c
@@ -234,11 +234,20 @@ static int jz4740_ohci_remove(struct platform_device *pdev)
 	return 0;
 }
 
+#ifdef CONFIG_OF
+static struct of_device_id jz4740_ohci_of_match[] = {
+	{ .compatible = "ingenic,jz4740-ohci", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, jz4740_ohci_of_match);
+#endif
+
 static struct platform_driver ohci_hcd_jz4740_driver = {
 	.probe = jz4740_ohci_probe,
 	.remove = jz4740_ohci_remove,
 	.driver = {
 		.name = "jz4740-ohci",
+		.of_match_table = of_match_ptr(jz4740_ohci_of_match),
 		.owner = THIS_MODULE,
 	},
 };
-- 
1.9.1

[PATCH 3/3] usb: ohci: jz4740: prepare the clock before enabling it

[Zubair Lutfullah Kakakhel]

From: Paul Burton <paul.burton@imgtec.com>

The clock must have been prepared before enabling it.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
---
 drivers/usb/host/ohci-jz4740.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/ohci-jz4740.c b/drivers/usb/host/ohci-jz4740.c
index bb69733..1455a8b 100644
--- a/drivers/usb/host/ohci-jz4740.c
+++ b/drivers/usb/host/ohci-jz4740.c
@@ -189,7 +189,7 @@ static int jz4740_ohci_probe(struct platform_device *pdev)
 
 
 	clk_set_rate(jz4740_ohci->clk, 48000000);
-	clk_enable(jz4740_ohci->clk);
+	clk_prepare_enable(jz4740_ohci->clk);
 	if (jz4740_ohci->vbus)
 		ohci_jz4740_set_vbus_power(jz4740_ohci, true);
 
-- 
1.9.1