Hi, On Wed, Jul 18, 2012 at 12:00:38PM +0530, Kishon Vijay Abraham I wrote: > Adds a new driver *omap-ocp2scp*. This driver takes the responsibility of > creating all the devices that is connected to OCP2SCP. In the case of OMAP4, > USB2PHY is connected to ocp2scp. > > This also includes device tree support for ocp2scp driver and > the documentation with device tree binding information is updated. > > Cc: Felipe Balbi <balbi@xxxxxx> If you fix (or change my mind) on the comment below, you can add: Acked-by: Felipe Balbi <balbi@xxxxxx> Also, I wonder who should be the one to take this. Who will be queueing patches on this directory to mainline ? > Acked-by: Arnd Bergmann <arnd@xxxxxxxx> > Signed-off-by: Kishon Vijay Abraham I <kishon@xxxxxx> > --- > .../devicetree/bindings/bus/omap-ocp2scp.txt | 10 ++ > drivers/Kconfig | 2 + > drivers/Makefile | 2 + > drivers/bus/Kconfig | 15 +++ > drivers/bus/Makefile | 5 + > drivers/bus/omap-ocp2scp.c | 98 ++++++++++++++++++++ > 6 files changed, 132 insertions(+), 0 deletions(-) > create mode 100644 Documentation/devicetree/bindings/bus/omap-ocp2scp.txt > create mode 100644 drivers/bus/Kconfig > create mode 100644 drivers/bus/Makefile > create mode 100644 drivers/bus/omap-ocp2scp.c > > diff --git a/Documentation/devicetree/bindings/bus/omap-ocp2scp.txt b/Documentation/devicetree/bindings/bus/omap-ocp2scp.txt > new file mode 100644 > index 0000000..d2fe064 > --- /dev/null > +++ b/Documentation/devicetree/bindings/bus/omap-ocp2scp.txt > @@ -0,0 +1,10 @@ > +* OMAP OCP2SCP - ocp interface to scp interface > + > +properties: > +- compatible : Should be "ti,omap-ocp2scp" > +- #address-cells, #size-cells : Must be present if the device has sub-nodes > +- ranges : the child address space are mapped 1:1 onto the parent address space > +- ti,hwmods : must be "ocp2scp_usb_phy" > + > +Sub-nodes: > +All the devices connected to ocp2scp are described using sub-node to ocp2scp > diff --git a/drivers/Kconfig b/drivers/Kconfig > index bfc9186..4fe1e4c 100644 > --- a/drivers/Kconfig > +++ b/drivers/Kconfig > @@ -2,6 +2,8 @@ menu "Device Drivers" > > source "drivers/base/Kconfig" > > +source "drivers/bus/Kconfig" > + > source "drivers/connector/Kconfig" > > source "drivers/mtd/Kconfig" > diff --git a/drivers/Makefile b/drivers/Makefile > index 2ba29ff..cac3819 100644 > --- a/drivers/Makefile > +++ b/drivers/Makefile > @@ -5,6 +5,8 @@ > # Rewritten to use lists instead of if-statements. > # > > +obj-y += bus/ > + > # GPIO must come after pinctrl as gpios may need to mux pins etc > obj-y += pinctrl/ > obj-y += gpio/ > diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig > new file mode 100644 > index 0000000..6270415 > --- /dev/null > +++ b/drivers/bus/Kconfig > @@ -0,0 +1,15 @@ > +# > +# Bus Devices > +# > + > +menu "Bus devices" > + > +config OMAP_OCP2SCP > + tristate "OMAP OCP2SCP DRIVER" > + help > + Driver to enable ocp2scp module which transforms ocp interface > + protocol to scp protocol. In OMAP4, USB PHY is connected via > + OCP2SCP and in OMAP5, both USB PHY and SATA PHY is connected via > + OCP2SCP. > + > +endmenu > diff --git a/drivers/bus/Makefile b/drivers/bus/Makefile > new file mode 100644 > index 0000000..0ec50bc > --- /dev/null > +++ b/drivers/bus/Makefile > @@ -0,0 +1,5 @@ > +# > +# Makefile for the bus drivers. > +# > + > +obj-$(CONFIG_OMAP_OCP2SCP) += omap-ocp2scp.o > diff --git a/drivers/bus/omap-ocp2scp.c b/drivers/bus/omap-ocp2scp.c > new file mode 100644 > index 0000000..8c3db3a > --- /dev/null > +++ b/drivers/bus/omap-ocp2scp.c > @@ -0,0 +1,98 @@ > +/* > + * omap-ocp2scp.c - transform ocp interface protocol to scp protocol > + * > + * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License as published by > + * the Free Software Foundation; either version 2 of the License, or > + * (at your option) any later version. > + * > + * Author: Kishon Vijay Abraham I <kishon@xxxxxx> > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + * > + */ > + > +#include <linux/module.h> > +#include <linux/platform_device.h> > +#include <linux/err.h> > +#include <linux/pm_runtime.h> > +#include <linux/of.h> > +#include <linux/of_platform.h> > + > +static int ocp2scp_remove_devices(struct device *dev, void *c) > +{ > + struct platform_device *pdev = to_platform_device(dev); > + > + platform_device_unregister(pdev); > + > + return 0; > +} > + > +static int __devinit omap_ocp2scp_probe(struct platform_device *pdev) > +{ > + int ret; > + struct device_node *np = pdev->dev.of_node; > + > + if (np) { > + ret = of_platform_populate(np, NULL, NULL, &pdev->dev); > + if (ret) { > + dev_err(&pdev->dev, "failed to add resources for ocp2scp child\n"); > + goto err0; > + } > + } > + pm_runtime_enable(&pdev->dev); > + > + return 0; > + > +err0: > + device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices); > + > + return ret; > +} > + > +static int __devexit omap_ocp2scp_remove(struct platform_device *pdev) > +{ > + pm_runtime_disable(&pdev->dev); > + device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices); > + > + return 0; > +} > + > +#ifdef CONFIG_OF > +static const struct of_device_id omap_ocp2scp_id_table[] = { > + { .compatible = "ti,omap-ocp2scp" }, > + {} > +}; > +MODULE_DEVICE_TABLE(of, omap_usb2_id_table); > +#endif > + > +static struct platform_driver omap_ocp2scp_driver = { > + .probe = omap_ocp2scp_probe, > + .remove = __devexit_p(omap_ocp2scp_remove), > + .driver = { > + .name = "omap-ocp2scp", > + .owner = THIS_MODULE, > + .of_match_table = of_match_ptr(omap_ocp2scp_id_table), > + }, > +}; > + > +static int __init omap_ocp2scp_init(void) > +{ > + return platform_driver_register(&omap_ocp2scp_driver); > +} > +arch_initcall(omap_ocp2scp_init); I really think we should avoid this trickery and make dependent drivers return -EPROBE_DEFER case this isn't ready yet. -- balbi
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