[PATCH 3/9] USB: add devicetree helpers for determining dr_mode and phy_type
Peter Chen
peter.chen at freescale.com
Wed Mar 13 05:43:31 EDT 2013
On Mon, Feb 04, 2013 at 02:24:29PM +0100, Sascha Hauer wrote:
> From: Michael Grzeschik <m.grzeschik at pengutronix.de>
>
> This adds two little devicetree helper functions for determining the
> dr_mode (host, peripheral, otg) and phy_type (utmi, ulpi,...) from
> the devicetree.
>
> Signed-off-by: Michael Grzeschik <m.grzeschik at pengutronix.de>
> Signed-off-by: Marc Kleine-Budde <mkl at pengutronix.de>
> Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
> ---
> drivers/usb/phy/Makefile | 1 +
> drivers/usb/phy/of.c | 47 ++++++++++++++++++++++++++++++++++++++++++++++
> drivers/usb/usb-common.c | 36 +++++++++++++++++++++++++++++++++++
> include/linux/usb/of.h | 27 ++++++++++++++++++++++++++
> include/linux/usb/otg.h | 7 +++++++
> include/linux/usb/phy.h | 9 +++++++++
> 6 files changed, 127 insertions(+)
> create mode 100644 drivers/usb/phy/of.c
> create mode 100644 include/linux/usb/of.h
>
> diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile
> index 9fa6327..e1be1e8 100644
> --- a/drivers/usb/phy/Makefile
> +++ b/drivers/usb/phy/Makefile
> @@ -5,6 +5,7 @@
> ccflags-$(CONFIG_USB_DEBUG) := -DDEBUG
>
> obj-$(CONFIG_USB_OTG_UTILS) += phy.o
> +obj-$(CONFIG_OF) += of.o
> obj-$(CONFIG_OMAP_USB2) += omap-usb2.o
> obj-$(CONFIG_OMAP_USB3) += omap-usb3.o
> obj-$(CONFIG_OMAP_CONTROL_USB) += omap-control-usb.o
> diff --git a/drivers/usb/phy/of.c b/drivers/usb/phy/of.c
> new file mode 100644
> index 0000000..e6f3b74
> --- /dev/null
> +++ b/drivers/usb/phy/of.c
> @@ -0,0 +1,47 @@
> +/*
> + * USB of helper code
> + *
> + * 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.
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/usb/of.h>
> +#include <linux/usb/otg.h>
> +
> +static const char *usbphy_modes[] = {
> + [USBPHY_INTERFACE_MODE_UNKNOWN] = "",
> + [USBPHY_INTERFACE_MODE_UTMI] = "utmi",
> + [USBPHY_INTERFACE_MODE_UTMIW] = "utmi_wide",
> + [USBPHY_INTERFACE_MODE_ULPI] = "ulpi",
> + [USBPHY_INTERFACE_MODE_SERIAL] = "serial",
> + [USBPHY_INTERFACE_MODE_HSIC] = "hsic",
> +};
> +
> +/**
> + * of_usb_get_phy_mode - Get phy mode for given device_node
> + * @np: Pointer to the given device_node
> + *
> + * The function gets phy interface string from property 'phy_type',
> + * and returns the correspondig enum usb_phy_interface
> + */
> +enum usb_phy_interface of_usb_get_phy_mode(struct device_node *np)
> +{
> + const char *phy_type;
> + int err, i;
> +
> + err = of_property_read_string(np, "phy_type", &phy_type);
> + if (err < 0)
> + return USBPHY_INTERFACE_MODE_UNKNOWN;
> +
> + for (i = 0; i < ARRAY_SIZE(usbphy_modes); i++)
> + if (!strcmp(phy_type, usbphy_modes[i]))
> + return i;
> +
> + return USBPHY_INTERFACE_MODE_UNKNOWN;
> +}
> +EXPORT_SYMBOL_GPL(of_usb_get_phy_mode);
> diff --git a/drivers/usb/usb-common.c b/drivers/usb/usb-common.c
> index d29503e..ad4d87d 100644
> --- a/drivers/usb/usb-common.c
> +++ b/drivers/usb/usb-common.c
> @@ -14,6 +14,9 @@
> #include <linux/kernel.h>
> #include <linux/module.h>
> #include <linux/usb/ch9.h>
> +#include <linux/of.h>
> +#include <linux/usb/of.h>
> +#include <linux/usb/otg.h>
>
> const char *usb_speed_string(enum usb_device_speed speed)
> {
> @@ -32,4 +35,37 @@ const char *usb_speed_string(enum usb_device_speed speed)
> }
> EXPORT_SYMBOL_GPL(usb_speed_string);
>
> +#ifdef CONFIG_OF
> +static const char *usb_dr_modes[] = {
> + [USB_DR_MODE_UNKNOWN] = "",
> + [USB_DR_MODE_HOST] = "host",
> + [USB_DR_MODE_PERIPHERAL] = "peripheral",
> + [USB_DR_MODE_OTG] = "otg",
> +};
> +
> +/**
> + * of_usb_get_dr_mode - Get dual role mode for given device_node
> + * @np: Pointer to the given device_node
> + *
> + * The function gets phy interface string from property 'dr_mode',
> + * and returns the correspondig enum usb_dr_mode
> + */
> +enum usb_dr_mode of_usb_get_dr_mode(struct device_node *np)
> +{
> + const char *dr_mode;
> + int err, i;
> +
> + err = of_property_read_string(np, "dr_mode", &dr_mode);
> + if (err < 0)
> + return USB_DR_MODE_UNKNOWN;
> +
> + for (i = 0; i < ARRAY_SIZE(usb_dr_modes); i++)
> + if (!strcmp(dr_mode, usb_dr_modes[i]))
> + return i;
> +
> + return USB_DR_MODE_UNKNOWN;
> +}
> +EXPORT_SYMBOL_GPL(of_usb_get_dr_mode);
> +#endif
> +
> MODULE_LICENSE("GPL");
> diff --git a/include/linux/usb/of.h b/include/linux/usb/of.h
> new file mode 100644
> index 0000000..4681a20
> --- /dev/null
> +++ b/include/linux/usb/of.h
> @@ -0,0 +1,27 @@
> +/*
> + * OF helpers for usb devices.
> + *
> + * This file is released under the GPLv2
> + */
> +
> +#ifndef __LINUX_USB_OF_H
> +#define __LINUX_USB_OF_H
> +
> +#include <linux/usb/phy.h>
Hi Michael,
When I use allmodconfig to build all usb module, I meet below
error. After changing #include <linux/usb/otg.h>, below
error is disappeared.
GEN /home/b29397/work/code/git/linus/linux-2.6/outout/all/Makefile
scripts/kconfig/conf --allmodconfig Kconfig
#
# configuration written to .config
#
/home/b29397/work/code/git/linus/linux-2.6/arch/x86/Makefile:92: stack protector enabled but no compiler support
/home/b29397/work/code/git/linus/linux-2.6/arch/x86/Makefile:107: CONFIG_X86_X32 enabled but no binutils support
GEN /home/b29397/work/code/git/linus/linux-2.6/outout/all/Makefile
scripts/kconfig/conf --silentoldconfig Kconfig
/home/b29397/work/code/git/linus/linux-2.6/arch/x86/Makefile:92: stack protector enabled but no compiler support
/home/b29397/work/code/git/linus/linux-2.6/arch/x86/Makefile:107: CONFIG_X86_X32 enabled but no binutils support
make[2]: Nothing to be done for `all'.
GEN /home/b29397/work/code/git/linus/linux-2.6/outout/all/Makefile
CHK include/generated/uapi/linux/version.h
make[2]: Nothing to be done for `relocs'.
Using /home/b29397/work/code/git/linus/linux-2.6 as source for kernel
CHK include/generated/utsrelease.h
CALL /home/b29397/work/code/git/linus/linux-2.6/scripts/checksyscalls.sh
CC [M] drivers/usb/usb-common.o
In file included from /home/b29397/work/code/git/linus/linux-2.6/drivers/usb/usb-common.c:18:
/home/b29397/work/code/git/linus/linux-2.6/include/linux/usb/of.h:22: error: return type is an incomplete type
/home/b29397/work/code/git/linus/linux-2.6/include/linux/usb/of.h: In function ‘of_usb_get_dr_mode’:
/home/b29397/work/code/git/linus/linux-2.6/include/linux/usb/of.h:23: error: ‘USB_DR_MODE_UNKNOWN’ undeclared (first use in this function)
/home/b29397/work/code/git/linus/linux-2.6/include/linux/usb/of.h:23: error: (Each undeclared identifier is reported only once
/home/b29397/work/code/git/linus/linux-2.6/include/linux/usb/of.h:23: error: for each function it appears in.)
/home/b29397/work/code/git/linus/linux-2.6/include/linux/usb/of.h:23: warning: ‘return’ with a value, in function returning void
make[2]: *** [drivers/usb/usb-common.o] Error 1
make[2]: *** Waiting for unfinished jobs....
--
Best Regards,
Peter Chen
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