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Message-ID: <CAFp+6iExOPunF=ND7_17PZXA217K_4im4ZJvR=mW2Ym_gnA0GQ@mail.gmail.com>
Date: Sat, 26 Oct 2013 15:11:29 +0530
From: Vivek Gautam <gautamvivek1987@...il.com>
To: Kamil Debski <k.debski@...sung.com>
Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-samsung-soc@...r.kernel.org"
<linux-samsung-soc@...r.kernel.org>,
Linux USB Mailing List <linux-usb@...r.kernel.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
linux-arm@...r.kernel.org,
Kyungmin Park <kyungmin.park@...sung.com>,
kishon <kishon@...com>, Tomasz Figa <t.figa@...sung.com>,
Sylwester Nawrocki <s.nawrocki@...sung.com>,
Marek Szyprowski <m.szyprowski@...sung.com>,
Vivek Gautam <gautam.vivek@...sung.com>, mat.krawczuk@...il.com
Subject: Re: [PATCH 4/5] usb: ehci-s5p: Change to use phy provided by the
generic phy framework
Hi Kamil,
On Fri, Oct 25, 2013 at 7:45 PM, Kamil Debski <k.debski@...sung.com> wrote:
> Change the phy provider used from the old usb phy specific to a new one
> using the generic phy framework.
>
> Signed-off-by: Kamil Debski <k.debski@...sung.com>
> Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>
> ---
> drivers/usb/host/ehci-s5p.c | 21 +++++++++++----------
> 1 file changed, 11 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/usb/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c
> index 7cc26e6..76606ff 100644
> --- a/drivers/usb/host/ehci-s5p.c
> +++ b/drivers/usb/host/ehci-s5p.c
> @@ -19,6 +19,7 @@
> #include <linux/module.h>
> #include <linux/of.h>
> #include <linux/of_gpio.h>
> +#include <linux/phy/phy.h>
> #include <linux/platform_device.h>
> #include <linux/platform_data/usb-ehci-s5p.h>
> #include <linux/usb/phy.h>
> @@ -45,7 +46,7 @@ static struct hc_driver __read_mostly s5p_ehci_hc_driver;
>
> struct s5p_ehci_hcd {
> struct clk *clk;
> - struct usb_phy *phy;
> + struct phy *phy;
> struct usb_otg *otg;
> struct s5p_ehci_platdata *pdata;
> };
> @@ -77,10 +78,11 @@ static int s5p_ehci_probe(struct platform_device *pdev)
> {
> struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
> struct s5p_ehci_hcd *s5p_ehci;
> + struct phy *phy;
just a nit here:
Lets keep the pointer to 'phy' and 'phy_name' together ?
and move this above phy_name ?
> struct usb_hcd *hcd;
> struct ehci_hcd *ehci;
> struct resource *res;
> - struct usb_phy *phy;
> + const char *phy_name;
> int irq;
> int err;
>
> @@ -103,14 +105,14 @@ static int s5p_ehci_probe(struct platform_device *pdev)
> return -ENOMEM;
> }
> s5p_ehci = to_s5p_ehci(hcd);
> -
> + phy_name = of_get_property(pdev->dev.of_node, "phy-names", NULL);
> + phy = devm_phy_get(&pdev->dev, phy_name);
Below check for exynos5440 was supposed to skip any request phy.
So shouldn't we place above two assignments to the original place
where devm_usb_get_phy()
was called ?
May be i am not getting you intention of changing the place.
> if (of_device_is_compatible(pdev->dev.of_node,
> "samsung,exynos5440-ehci")) {
> s5p_ehci->pdata = &empty_platdata;
> goto skip_phy;
> }
>
> - phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
> if (IS_ERR(phy)) {
> /* Fallback to pdata */
> if (!pdata) {
> @@ -122,7 +124,6 @@ static int s5p_ehci_probe(struct platform_device *pdev)
> }
> } else {
> s5p_ehci->phy = phy;
> - s5p_ehci->otg = phy->otg;
> }
>
> skip_phy:
> @@ -166,7 +167,7 @@ skip_phy:
> s5p_ehci->otg->set_host(s5p_ehci->otg, &hcd->self);
Lets remove this line and similar calls to 'set_host()' in the driver,
since we don't have
s5p_ehci->otg anymore after the same is removed above.
Anyways this was helping the old phy-samsung-usb2 driver, and not needed now.
>
> if (s5p_ehci->phy)
> - usb_phy_init(s5p_ehci->phy);
> + phy_power_on(s5p_ehci->phy);
> else if (s5p_ehci->pdata->phy_init)
> s5p_ehci->pdata->phy_init(pdev, USB_PHY_TYPE_HOST);
>
> @@ -188,7 +189,7 @@ skip_phy:
>
> fail_add_hcd:
> if (s5p_ehci->phy)
> - usb_phy_shutdown(s5p_ehci->phy);
> + phy_power_off(s5p_ehci->phy);
> else if (s5p_ehci->pdata->phy_exit)
> s5p_ehci->pdata->phy_exit(pdev, USB_PHY_TYPE_HOST);
> fail_io:
> @@ -209,7 +210,7 @@ static int s5p_ehci_remove(struct platform_device *pdev)
> s5p_ehci->otg->set_host(s5p_ehci->otg, &hcd->self);
ditto
>
> if (s5p_ehci->phy)
> - usb_phy_shutdown(s5p_ehci->phy);
> + phy_power_off(s5p_ehci->phy);
> else if (s5p_ehci->pdata->phy_exit)
> s5p_ehci->pdata->phy_exit(pdev, USB_PHY_TYPE_HOST);
>
> @@ -244,7 +245,7 @@ static int s5p_ehci_suspend(struct device *dev)
> s5p_ehci->otg->set_host(s5p_ehci->otg, &hcd->self);
ditto
>
> if (s5p_ehci->phy)
> - usb_phy_shutdown(s5p_ehci->phy);
> + phy_power_off(s5p_ehci->phy);
> else if (s5p_ehci->pdata->phy_exit)
> s5p_ehci->pdata->phy_exit(pdev, USB_PHY_TYPE_HOST);
>
> @@ -265,7 +266,7 @@ static int s5p_ehci_resume(struct device *dev)
> s5p_ehci->otg->set_host(s5p_ehci->otg, &hcd->self);
ditto
>
> if (s5p_ehci->phy)
> - usb_phy_init(s5p_ehci->phy);
> + phy_power_on(s5p_ehci->phy);
> else if (s5p_ehci->pdata->phy_init)
> s5p_ehci->pdata->phy_init(pdev, USB_PHY_TYPE_HOST);
>
[..] Rest looks good. :-)
--
Best Regards
Vivek
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