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From: Peter Griffin <peter.griffin-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
To: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	maxime.coquelin-qxv4g6HH51o@public.gmane.org,
	patrice.chotard-qxv4g6HH51o@public.gmane.org,
	srinivas.kandagatla-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
	devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	balbi-l0cyMroinI0@public.gmane.org
Cc: peter.griffin-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
	lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
	linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	peppe.cavallaro-qxv4g6HH51o@public.gmane.org
Subject: [PATCH v4 2/3] usb: dwc3: dwc3-st: Add st-dwc3 devicetree bindings documentation
Date: Wed, 30 Jul 2014 16:28:10 +0100	[thread overview]
Message-ID: <1406734091-16202-3-git-send-email-peter.griffin@linaro.org> (raw)
In-Reply-To: <1406734091-16202-1-git-send-email-peter.griffin-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>

This patch documents the device tree documentation required for
the ST usb3 controller glue layer found in STiH407 devices.

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro-qxv4g6HH51o@public.gmane.org>
Signed-off-by: Peter Griffin <peter.griffin-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Acked-by: Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
---
 Documentation/devicetree/bindings/usb/dwc3-st.txt | 69 +++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/dwc3-st.txt

diff --git a/Documentation/devicetree/bindings/usb/dwc3-st.txt b/Documentation/devicetree/bindings/usb/dwc3-st.txt
new file mode 100644
index 0000000..de3fea3
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/dwc3-st.txt
@@ -0,0 +1,69 @@
+ST DWC3 glue logic
+
+This file documents the parameters for the dwc3-st driver.
+This driver controls the glue logic used to configure the dwc3 core on
+STiH407 based platforms.
+
+Required properties:
+ - compatible	: must be "st,stih407-dwc3"
+ - reg		: glue logic base address and USB syscfg ctrl register offset
+ - reg-names	: should be "reg-glue" and "syscfg-reg"
+ - st,syscon	: should be phandle to system configuration node which
+		  encompasses the glue registers
+ - resets	: list of phandle and reset specifier pairs. There should be two entries, one
+		  for the powerdown and softreset lines of the usb3 IP
+ - reset-names	: list of reset signal names. Names should be "powerdown" and "softreset"
+See: Documentation/devicetree/bindings/reset/st,sti-powerdown.txt
+See: Documentation/devicetree/bindings/reset/reset.txt
+
+ - #address-cells, #size-cells : should be '1' if the device has sub-nodes
+                                 with 'reg' property
+
+ - pinctl-names	: A pinctrl state named "default" must be defined
+See: Documentation/devicetree/bindings/pinctrl/pinctrl-binding.txt
+
+ - pinctrl-0	: Pin control group
+See: Documentation/devicetree/bindings/pinctrl/pinctrl-binding.txt
+
+ - ranges	: allows valid 1:1 translation between child's address space and
+		  parent's address space
+
+Sub-nodes:
+The dwc3 core should be added as subnode to ST DWC3 glue as shown in the
+example below. The DT binding details of dwc3 can be found in:
+Documentation/devicetree/bindings/usb/dwc3.txt
+
+NB: The dr_mode property described in [1] is NOT optional for this driver, as the default value
+is "otg", which isn't supported by this SoC. Valid dr_mode values for dwc3-st are either "host"
+or "device".
+
+[1] Documentation/devicetree/bindings/usb/generic.txt
+
+Example:
+
+st_dwc3: dwc3@8f94000 {
+	status		= "disabled";
+	compatible	= "st,stih407-dwc3";
+	reg		= <0x08f94000 0x1000>, <0x110 0x4>;
+	reg-names	= "reg-glue", "syscfg-reg";
+	st,syscfg	= <&syscfg_core>;
+	resets		= <&powerdown STIH407_USB3_POWERDOWN>;
+			  <&softreset STIH407_MIPHY2_SOFTRESET>;
+	reset-names	= "powerdown",
+			  "softreset";
+	#address-cells	= <1>;
+	#size-cells	= <1>;
+	pinctrl-names	= "default";
+	pinctrl-0	= <&pinctrl_usb3>;
+	ranges;
+
+	dwc3: dwc3@9900000 {
+		compatible	= "snps,dwc3";
+		reg		= <0x09900000 0x100000>;
+		interrupts	= <GIC_SPI 155 IRQ_TYPE_NONE>;
+		dr_mode		= "host"
+		usb-phy		= <&usb3_phy>;
+		phy-names	= "usb2-phy";
+		phys		= <&usb2_picophy2>;
+	};
+};
-- 
1.9.1

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  parent reply	other threads:[~2014-07-30 15:28 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-07-30 15:28 [PATCH v4 0/3] Add ST dwc3 glue layer driver Peter Griffin
2014-07-30 15:28 ` [PATCH v4 1/3] usb: dwc3: add ST dwc3 glue layer to manage dwc3 HC Peter Griffin
2014-08-20 18:08   ` Felipe Balbi
     [not found]     ` <20140820180850.GV24500-HgARHv6XitL9zxVx7UNMDg@public.gmane.org>
2014-09-02 11:18       ` Peter Griffin
2014-09-02 15:12         ` Felipe Balbi
     [not found] ` <1406734091-16202-1-git-send-email-peter.griffin-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2014-07-30 15:28   ` Peter Griffin [this message]
     [not found]     ` <1406734091-16202-3-git-send-email-peter.griffin-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2014-08-20 18:00       ` [PATCH v4 2/3] usb: dwc3: dwc3-st: Add st-dwc3 devicetree bindings documentation Felipe Balbi
2014-08-21 13:33         ` Peter Griffin
2014-08-21 13:56           ` Felipe Balbi
     [not found]             ` <20140821135620.GD9608-HgARHv6XitL9zxVx7UNMDg@public.gmane.org>
2014-08-21 14:03               ` Peter Griffin
2014-08-21 14:10                 ` Felipe Balbi
2014-07-30 15:28 ` [PATCH v4 3/3] MAINTAINERS: Add dwc3-st.c file to ARCH/STI architecture Peter Griffin
     [not found]   ` <1406734091-16202-4-git-send-email-peter.griffin-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2014-08-20 17:58     ` Felipe Balbi
     [not found]       ` <20140820175824.GT24500-HgARHv6XitL9zxVx7UNMDg@public.gmane.org>
2014-08-21 13:15         ` Peter Griffin

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