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Date: Sat, 23 Nov 2013 17:04:16 +1100
From: dt.tangr@...il.com
To: linux-usb@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
linux-doc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux@....linux.org.uk, Daniel Tang <dt.tangr@...il.com>
Subject: [PATCH] usb: chipidea: add support for USB OTG controller on TI-NSPIRE
From: Daniel Tang <dt.tangr@...il.com>
The USB controller in TI-NSPIRE calculators are based
off either Freescale's USB OTG controller or the USB
controller found in the IMX233, both of which are
Chipidea compatible.
This patch adds a device tree binding for the controller.
Signed-off-by: Daniel Tang <dt.tangr@...il.com>
---
.../devicetree/bindings/usb/ci13xxx-nspire.txt | 17 +++++
drivers/usb/chipidea/Makefile | 1 +
drivers/usb/chipidea/ci_hdrc_nspire.c | 74 ++++++++++++++++++++++
3 files changed, 92 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/ci13xxx-nspire.txt
create mode 100644 drivers/usb/chipidea/ci_hdrc_nspire.c
diff --git a/Documentation/devicetree/bindings/usb/ci13xxx-nspire.txt b/Documentation/devicetree/bindings/usb/ci13xxx-nspire.txt
new file mode 100644
index 0000000..5ba8e90
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/ci13xxx-nspire.txt
@@ -0,0 +1,17 @@
+* TI-Nspire USB OTG Controller
+
+Required properties:
+- compatible: Should be "zevio,nspire-usb"
+- reg: Should contain registers location and length
+- interrupts: Should contain controller interrupt
+
+Recommended properies:
+- vbus-supply: regulator for vbus
+
+Examples:
+ usb0: usb@...00000 {
+ reg = <0xB0000000 0x1000>;
+ compatible = "zevio,nspire-usb";
+ interrupts = <8>;
+ vbus-supply = <&vbus_reg>;
+ };
diff --git a/drivers/usb/chipidea/Makefile b/drivers/usb/chipidea/Makefile
index a99d980..245ea4d 100644
--- a/drivers/usb/chipidea/Makefile
+++ b/drivers/usb/chipidea/Makefile
@@ -10,6 +10,7 @@ ci_hdrc-$(CONFIG_USB_CHIPIDEA_DEBUG) += debug.o
# Glue/Bridge layers go here
obj-$(CONFIG_USB_CHIPIDEA) += ci_hdrc_msm.o
+obj-$(CONFIG_USB_CHIPIDEA) += ci_hdrc_nspire.o
# PCI doesn't provide stubs, need to check
ifneq ($(CONFIG_PCI),)
diff --git a/drivers/usb/chipidea/ci_hdrc_nspire.c b/drivers/usb/chipidea/ci_hdrc_nspire.c
new file mode 100644
index 0000000..318761d
--- /dev/null
+++ b/drivers/usb/chipidea/ci_hdrc_nspire.c
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2013 Daniel Tang <tangrs@...grs.id.au>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2, as
+ * published by the Free Software Foundation.
+ *
+ * Based off drivers/usb/chipidea/ci_hdrc_msm.c
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/chipidea.h>
+
+#include "ci.h"
+
+static struct ci_hdrc_platform_data ci_hdrc_nspire_platdata = {
+ .name = "ci_hdrc_nspire",
+ .flags = CI_HDRC_REGS_SHARED,
+ .capoffset = DEF_CAPOFFSET,
+};
+
+static int ci_hdrc_nspire_probe(struct platform_device *pdev)
+{
+ struct platform_device *ci_pdev;
+
+ dev_dbg(&pdev->dev, "ci_hdrc_nspire_probe\n");
+
+ ci_pdev = ci_hdrc_add_device(&pdev->dev,
+ pdev->resource, pdev->num_resources,
+ &ci_hdrc_nspire_platdata);
+
+ if (IS_ERR(ci_pdev)) {
+ dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n");
+ return PTR_ERR(ci_pdev);
+ }
+
+ platform_set_drvdata(pdev, ci_pdev);
+
+ return 0;
+}
+
+static int ci_hdrc_nspire_remove(struct platform_device *pdev)
+{
+ struct platform_device *ci_pdev = platform_get_drvdata(pdev);
+
+ ci_hdrc_remove_device(ci_pdev);
+
+ return 0;
+}
+
+static const struct of_device_id ci_hdrc_nspire_dt_ids[] = {
+ { .compatible = "zevio,nspire-usb", },
+ { /* sentinel */ }
+};
+
+static struct platform_driver ci_hdrc_nspire_driver = {
+ .probe = ci_hdrc_nspire_probe,
+ .remove = ci_hdrc_nspire_remove,
+ .driver = {
+ .name = "nspire_usb",
+ .owner = THIS_MODULE,
+ .of_match_table = ci_hdrc_nspire_dt_ids,
+ },
+};
+
+MODULE_DEVICE_TABLE(of, ci_hdrc_nspire_dt_ids);
+module_platform_driver(ci_hdrc_nspire_driver);
+
+MODULE_ALIAS("platform:nspire_usb");
+MODULE_ALIAS("platform:ci13xxx_nspire");
+MODULE_LICENSE("GPL v2");
--
1.8.1.3
--
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