On 02/11/2013 02:00 PM, Mark Rutland wrote:
> On Thu, Feb 07, 2013 at 04:02:49PM +0000, Roger Quadros wrote:
>> Allows the OMAP HS USB host controller to be specified
>> via device tree.
>>
>> CC: Samuel Ortiz <sameo@xxxxxxxxxxxxxxx>
>> Signed-off-by: Roger Quadros <rogerq@xxxxxx>
>> ---
>> .../devicetree/bindings/mfd/omap-usb-host.txt | 80 ++++++++++
>> drivers/mfd/omap-usb-host.c | 160 +++++++++++++++++++-
>> 2 files changed, 234 insertions(+), 6 deletions(-)
>> create mode 100644 Documentation/devicetree/bindings/mfd/omap-usb-host.txt
>>
>> diff --git a/Documentation/devicetree/bindings/mfd/omap-usb-host.txt b/Documentation/devicetree/bindings/mfd/omap-usb-host.txt
>> new file mode 100644
>> index 0000000..b381fa6
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/mfd/omap-usb-host.txt
>> @@ -0,0 +1,80 @@
>> +OMAP HS USB Host
>> +
>> +Required properties:
>> +
>> +- compatible: should be "ti,usbhs-host"
>> +- reg: should contain one register range i.e. start and length
>> +- ti,hwmods: must contain "usb_host_hs"
>> +
>> +Optional properties:
>> +
>> +- num-ports: number of USB ports. Usually this is automatically detected
>> + from the IP's revision register but can be overridden by specifying
>> + this property. A maximum of 3 ports are supported at the moment.
>> +
>> +- portN-mode: String specifying the port mode for port N, where N can be
>> + from 1 to 3. If the port mode is not specified, that port is treated
>> + as unused. When specified, it must be one of the following.
>> + "ehci-phy",
>> + "ehci-tll",
>> + "ehci-hsic",
>> + "ohci-phy-6pin-datse0",
>> + "ohci-phy-6pin-dpdm",
>> + "ohci-phy-3pin-datse0",
>> + "ohci-phy-4pin-dpdm",
>> + "ohci-tll-6pin-datse0",
>> + "ohci-tll-6pin-dpdm",
>> + "ohci-tll-3pin-datse0",
>> + "ohci-tll-4pin-dpdm",
>> + "ohci-tll-2pin-datse0",
>> + "ohci-tll-2pin-dpdm",
>> +
>
> [...]
>
>> +/**
>> + * Map 'enum usbhs_omap_port_mode' found in <linux/platform_data/usb-omap.h>
>> + * to the device tree binding portN-mode found in
>> + * 'Documentation/devicetree/bindings/mfd/omap-usb-host.txt'
>> + */
>> +static const char *port_modes[] = {
>> + [OMAP_USBHS_PORT_MODE_UNUSED] = "",
>> + [OMAP_EHCI_PORT_MODE_PHY] = "ehci-phy",
>> + [OMAP_EHCI_PORT_MODE_TLL] = "ehci-tll",
>> + [OMAP_EHCI_PORT_MODE_HSIC] = "ehci-hsic",
>> + [OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0] = "ohci-phy-6pin-datse0",
>> + [OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM] = "ohci-phy-6pin-dpdm",
>> + [OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0] = "ohci-phy-3pin-datse0",
>> + [OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM] = "ohci-phy-4pin-dpdm",
>> + [OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0] = "ohci-tll-6pin-datse0",
>> + [OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM] = "ohci-tll-6pin-dpdm",
>> + [OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0] = "ohci-tll-3pin-datse0",
>> + [OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM] = "ohci-tll-4pin-dpdm",
>> + [OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0] = "ohci-tll-2pin-datse0",
>> + [OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM] = "ohci-tll-2pin-dpdm",
>> +};
>> +
>> +/**
>> + * omap_usbhs_get_dt_port_mode - Get the 'enum usbhs_omap_port_mode'
>> + * from the port mode string.
>> + * @mode: The port mode string, usually obtained from device tree.
>> + *
>> + * The function returns the 'enum usbhs_omap_port_mode' that matches the
>> + * provided port mode string as per the port_modes table.
>> + * If no match is found it returns -ENODEV
>> + */
>> +static const int omap_usbhs_get_dt_port_mode(const char *mode)
>> +{
>> + int i;
>> +
>> + for (i = 0; i < ARRAY_SIZE(port_modes); i++) {
>> + if (!strcasecmp(mode, port_modes[i]))
>> + return i;
>> + }
>
> Any reason for using strcasecmp rather than strcmp? The binding only specified
> lower case versions, and this allows people to write "oHcI-PhY-6PiN-DaTsE0"
> with impunity.
:). No specific reason. I'll change it to strcmp.
>
> Otherwise, this looks fine to me.
Thanks.
cheers,
-roger
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