On Thursday 18 July 2013 12:51 PM, Greg KH wrote:
> On Thu, Jul 18, 2013 at 12:16:11PM +0530, Kishon Vijay Abraham I wrote:
>> Used the generic PHY framework API to create the PHY. Now the power off and
>> power on are done in omap_usb_power_off and omap_usb_power_on respectively.
>>
>> However using the old USB PHY library cannot be completely removed
>> because OTG is intertwined with PHY and moving to the new framework
>> will break OTG. Once we have a separate OTG state machine, we
>> can get rid of the USB PHY library.
>>
>> Signed-off-by: Kishon Vijay Abraham I <kishon@xxxxxx>
>> Reviewed-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
>> Acked-by: Felipe Balbi <balbi@xxxxxx>
>> ---
>> drivers/usb/phy/Kconfig | 1 +
>> drivers/usb/phy/phy-omap-usb2.c | 45 +++++++++++++++++++++++++++++++++++----
>> 2 files changed, 42 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
>> index 3622fff..cc55993 100644
>> --- a/drivers/usb/phy/Kconfig
>> +++ b/drivers/usb/phy/Kconfig
>> @@ -75,6 +75,7 @@ config OMAP_CONTROL_USB
>> config OMAP_USB2
>> tristate "OMAP USB2 PHY Driver"
>> depends on ARCH_OMAP2PLUS
>> + depends on GENERIC_PHY
>> select OMAP_CONTROL_USB
>> help
>> Enable this to support the transceiver that is part of SOC. This
>> diff --git a/drivers/usb/phy/phy-omap-usb2.c b/drivers/usb/phy/phy-omap-usb2.c
>> index 844ab68..751b30f 100644
>> --- a/drivers/usb/phy/phy-omap-usb2.c
>> +++ b/drivers/usb/phy/phy-omap-usb2.c
>> @@ -28,6 +28,7 @@
>> #include <linux/pm_runtime.h>
>> #include <linux/delay.h>
>> #include <linux/usb/omap_control_usb.h>
>> +#include <linux/phy/phy.h>
>>
>> /**
>> * omap_usb2_set_comparator - links the comparator present in the sytem with
>> @@ -119,10 +120,36 @@ static int omap_usb2_suspend(struct usb_phy *x, int suspend)
>> return 0;
>> }
>>
>> +static int omap_usb_power_off(struct phy *x)
>> +{
>> + struct omap_usb *phy = phy_get_drvdata(x);
>> +
>> + omap_control_usb_phy_power(phy->control_dev, 0);
>> +
>> + return 0;
>> +}
>> +
>> +static int omap_usb_power_on(struct phy *x)
>> +{
>> + struct omap_usb *phy = phy_get_drvdata(x);
>> +
>> + omap_control_usb_phy_power(phy->control_dev, 1);
>> +
>> + return 0;
>> +}
>> +
>> +static struct phy_ops ops = {
>> + .power_on = omap_usb_power_on,
>> + .power_off = omap_usb_power_off,
>> + .owner = THIS_MODULE,
>> +};
>> +
>> static int omap_usb2_probe(struct platform_device *pdev)
>> {
>> struct omap_usb *phy;
>> + struct phy *generic_phy;
>> struct usb_otg *otg;
>> + struct phy_provider *phy_provider;
>>
>> phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL);
>> if (!phy) {
>> @@ -144,6 +171,11 @@ static int omap_usb2_probe(struct platform_device *pdev)
>> phy->phy.otg = otg;
>> phy->phy.type = USB_PHY_TYPE_USB2;
>>
>> + phy_provider = devm_of_phy_provider_register(phy->dev,
>> + of_phy_simple_xlate);
>> + if (IS_ERR(phy_provider))
>> + return PTR_ERR(phy_provider);
>> +
>> phy->control_dev = omap_get_control_dev();
>> if (IS_ERR(phy->control_dev)) {
>> dev_dbg(&pdev->dev, "Failed to get control device\n");
>> @@ -159,6 +191,15 @@ static int omap_usb2_probe(struct platform_device *pdev)
>> otg->start_srp = omap_usb_start_srp;
>> otg->phy = &phy->phy;
>>
>> + platform_set_drvdata(pdev, phy);
>> + pm_runtime_enable(phy->dev);
>> +
>> + generic_phy = devm_phy_create(phy->dev, 0, &ops, "omap-usb2");
>> + if (IS_ERR(generic_phy))
>> + return PTR_ERR(generic_phy);
>
> So, if I have two of these controllers in my system, I can't create the
> second phy because the name for it will be identical to the first?
> That's why the phy core should handle the id, and not rely on the
> drivers to set it, as they have no idea how many they have in the
> system.
hmm.. for such cases I'll have something like PLATFORM_DEVID_AUTO.
Thanks
Kishon
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